Commit Graph

1755 Commits

Author SHA1 Message Date
Ingo Molnar
1180e01de5 x86: more cleanups in arch/x86/boot/compressed/misc.c
Before:
   total: 7 errors, 8 warnings, 471 lines checked
After:
   total: 5 errors, 5 warnings, 479 lines checked

( the rest cannot be eliminated due to zlib interface cruftiness. )

No code changed:

arch/x86/boot/compressed/misc.o:

   text	   data	    bss	    dec	    hex	filename
  10716	      8	   2152	  12876	   324c	misc.o.before
  10716	      8	   2152	  12876	   324c	misc.o.after

md5:
   2c20c903986a3c9bca44306c6646067e  misc.o.before.asm
   2c20c903986a3c9bca44306c6646067e  misc.o.after.asm

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:49 +02:00
Paolo Ciarrocchi
fd77c7cabd x86: coding style fixes to arch/x86/boot/compressed/misc.c
Fix lots of style errors and warnings.

Before:
   total: 58 errors, 9 warnings, 469 lines checked
After:
   total: 7 errors, 8 warnings, 471 lines checked

No code changed:

arch/x86/boot/compressed/misc.o:

   text	   data	    bss	    dec	    hex	filename
  10716	      8	   2152	  12876	   324c	misc.o.before
  10716	      8	   2152	  12876	   324c	misc.o.after

md5:
   2c20c903986a3c9bca44306c6646067e  misc.o.before.asm
   2c20c903986a3c9bca44306c6646067e  misc.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:49 +02:00
Paolo Ciarrocchi
48e6b7a050 x86: coding style fixes to arch/x86/kernel/cpu/umc.c
Before:
   total: 3 errors, 1 warnings, 23 lines checked
After:
   total: 0 errors, 0 warnings, 25 lines checked

No code changed:

arch/x86/kernel/cpu/umc.o:

   text	   data	    bss	    dec	    hex	filename
     24	    616	      0	    640	    280	umc.o.before
     24	    616	      0	    640	    280	umc.o.after

md5:
   e8daa3eaed0963a0cdd2e83c2e1f9823  umc.o.before.asm
   e8daa3eaed0963a0cdd2e83c2e1f9823  umc.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:49 +02:00
Paolo Ciarrocchi
2c5847837f x86: coding style fixes to arch/x86/kernel/cpu/mcheck/p6.c
Before:
   total: 16 errors, 13 warnings, 122 lines checked
After:
   total: 0 errors, 0 warnings, 122 lines checked

No code changed:

arch/x86/kernel/cpu/mcheck/p6.o:

   text	   data	    bss	    dec	    hex	filename
   1082	      0	      8	   1090	    442	p6.o.before
   1082	      0	      8	   1090	    442	p6.o.after

md5:
   4e283fbc1b68240f1724d9725007d379  p6.o.before.asm
   4e283fbc1b68240f1724d9725007d379  p6.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:49 +02:00
Hiroshi Shimamoto
eb19067d16 x86: unify cpu/proc|_64.c
Now cpu/proc.c and cpu/proc_64.c are same.
So cpu/proc_64.c can be removed.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Hiroshi Shimamoto
2aef77204e x86: cosmetic unification cpu/proc|_64.c
make cpu/proc.c and cpu/proc_64.c same.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Hiroshi Shimamoto
f84c3a429f x86: add power management line in /proc/cpuinfo
Change /proc/cpuinfo on 32-bit, it will look like on 64-bit.
'power management' line is added and power management information
will be printed at the line.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Hiroshi Shimamoto
a967ceac01 x86: make cpu/proc|_64.c similar
clean up for unification.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Hiroshi Shimamoto
8fa6878ffc x86: split cpuinfo from setup_64.c into cpu/proc_64.c
x86 /proc/cpuinfo code can be unified.
This is the first step of unification.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Paolo Ciarrocchi
637cba0261 x86: coding style fixes to arch/x86/mach-generic/bigsmp.c
arch/x86/mach-generic/bigsmp.o:
   text    data     bss     dec     hex filename
   1271     144       4    1419     58b bigsmp.o.before
   1271     144       4    1419     58b bigsmp.o.after
md5:
 b83aad375294c002c79b03c3a2e4be35  bigsmp.o.before.asm
 b83aad375294c002c79b03c3a2e4be35  bigsmp.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Paolo Ciarrocchi
c99aa3804e x86: coding style fixes to arch/x86/kernel/cpu/nexgen.c
arch/x86/kernel/cpu/nexgen.o:
   text    data     bss     dec     hex filename
    111     316       0     427     1ab nexgen.o.before
    111     316       0     427     1ab nexgen.o.after
md5:
 e796efefea9ebc6644338bad226599ee  nexgen.o.before.asm
 e796efefea9ebc6644338bad226599ee  nexgen.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Paolo Ciarrocchi
8108576a78 x86: coding style fixes to arch/x86/mach-generic/summit.c
File is now error/warning free.

arch/x86/mach-generic/summit.o:
   text    data     bss     dec     hex filename
   1481     140       0    1621     655 summit.o.before
   1481     140       0    1621     655 summit.o.after
md5:
 7b7dc1cbd381af7b9393da989da5b0fd  summit.o.before.asm
 7b7dc1cbd381af7b9393da989da5b0fd  summit.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Paolo Ciarrocchi
651bbe16d0 x86: coding style fixes to arch/x86/mach-generic/default.c
Just whitespace cleanups.

total: 0 errors, 0 warnings, 26 lines checked
arch/x86/mach-generic/default.c has no obvious style problems and is ready for submission.

arch/x86/mach-generic/default.o:
   text    data     bss     dec     hex filename
   1036     140       0    1176     498 default.o.before
   1036     140       0    1176     498 default.o.after
md5:
f283c53022c568f3162bbcde44f65762  default.o.before.asm
f283c53022c568f3162bbcde44f65762  default.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Paolo Ciarrocchi
9b0c502882 x86: coding style fixes to arch/x86/mach-generic/probe.c
The patch kills 20 errors and a few warnings.

arch/x86/mach-generic/probe.o:
   text    data     bss     dec     hex filename
    578      45       0     623     26f probe.o.before
    578      45       0     623     26f probe.o.after
md5:
86eb1c3e3cf37f81d37bcd9a0c9f14ad  probe.o.before.asm
86eb1c3e3cf37f81d37bcd9a0c9f14ad  probe.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Paolo Ciarrocchi
d4413732b5 x86: coding style fixes to arch/x86/oprofile/op_model_athlon.c
The patch fixes 33 errors and a few warnings reported by checkpatch.pl

arch/x86/oprofile/op_model_athlon.o:
   text    data     bss     dec     hex filename
   1691       0      32    1723     6bb op_model_athlon.o.before
   1691       0      32    1723     6bb op_model_athlon.o.after
md5:
c354bc2d7140e1e626c03390eddaa0a6  op_model_athlon.o.before.asm
c354bc2d7140e1e626c03390eddaa0a6  op_model_athlon.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Paolo Ciarrocchi
8b45b72b04 x86: coding style fixes to arch/x86/oprofile/op_model_ppro.c
no code changed:

arch/x86/oprofile/op_model_ppro.o:
   text    data     bss     dec     hex filename
   1765       0      16    1781     6f5 op_model_ppro.o.before
   1765       0      16    1781     6f5 op_model_ppro.o.after
md5:
71c7f68d2197d686e3d1121bc18a6b6e  op_model_ppro.o.before.asm
71c7f68d2197d686e3d1121bc18a6b6e  op_model_ppro.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Paolo Ciarrocchi
8000a83f43 x86: coding style fixes to arch/x86/kernel/x8664_ksyms_64.c
arch/x86/kernel/x8664_ksyms_64.o:
   text    data     bss     dec     hex filename
      0       0       0       0       0 x8664_ksyms_64.o.before
      0       0       0       0       0 x8664_ksyms_64.o.after
md5:
2dd2d82a2b440a3c29b9ac9ce3221994  x8664_ksyms_64.o.before.asm
2dd2d82a2b440a3c29b9ac9ce3221994  x8664_ksyms_64.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Paolo Ciarrocchi
1577720524 x86: coding style fixes to arch/x86/kernel/cpu/mcheck/p5.c
The patch make the file errors free.
Only 4 "WARNING: line over 80 characters" left.

arch/x86/kernel/cpu/mcheck/p5.o:
   text    data     bss     dec     hex filename
    452       0       4     456     1c8 p5.o.before
    452       0       4     456     1c8 p5.o.after
md5:
50c945ef150aa95bf0481cc3e1dc3315  p5.o.before.asm
50c945ef150aa95bf0481cc3e1dc3315  p5.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Paolo Ciarrocchi
8cf36d2bc5 x86: coding style fixes to arch/x86/lib/string_32.c
The patch kills 45 errors and a few warnings.

The file is now error/warning free:
total: 0 errors, 0 warnings, 237 lines checked
arch/x86/lib/string_32.c has no obvious style problems and is ready for submission.

no code changed:

arch/x86/lib/string_32.o:
   text    data     bss     dec     hex filename
    639       0       0     639     27f string_32.o.before
    639       0       0     639     27f string_32.o.after
md5:
2db1c48187cf5113bb595153ee1fc73d  string_32.o.before.asm
2db1c48187cf5113bb595153ee1fc73d  string_32.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Paolo Ciarrocchi
325f86ec6d x86: coding style fixes to arch/x86/kernel/syscall_64.c
After the patch:
total: 0 errors, 1 warnings, 29 lines checked

no code changed:

arch/x86/kernel/syscall_64.o:
   text    data     bss     dec     hex filename
   2304       0       0    2304     900 syscall_64.o.before
   2304       0       0    2304     900 syscall_64.o.after
md5:
0fdbb875cde8892296585226b92f4333  syscall_64.o.before.asm
0fdbb875cde8892296585226b92f4333  syscall_64.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Paolo Ciarrocchi
e940659788 x86: coding style fixes to arch/x86/lib/memmove_64.c
After the patch:

  total: 0 errors, 0 warnings, 21 lines checked

no code changed:

arch/x86/lib/memmove_64.o:
   text    data     bss     dec     hex filename
    116       0       0     116      74 memmove_64.o.before
    116       0       0     116      74 memmove_64.o.after
md5:
2d6b0951cafb86a11a222cdd70f6104f  memmove_64.o.before.asm
2d6b0951cafb86a11a222cdd70f6104f  memmove_64.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Ian Campbell
87253d1b4f x86: boot protocol updates
Also update field names to simply payload_{offset,length} so as to not rule
out uncompressed images.

Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:48 +02:00
Ian Campbell
c92a7a54d6 x86: reduce arch/x86/mm/ioremap.o size
> Don't we have a special section for page-aligned data so it doesn't
> waste most of two pages?

We have .bss.page_aligned and it seems appropriate to use it.

    text	   data	    bss	    dec	    hex	filename
    -   3388	   8236	      4	  11628	   2d6c	../build-32/arch/x86/mm/ioremap.o
    +   3388	     48	   4100	   7536	   1d70	../build-32/arch/x86/mm/ioremap.o

Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:47 +02:00
Ingo Molnar
edc05e6de3 x86: more coding style fixes in centaur.c
no code changed:

 arch/x86/kernel/cpu/centaur.o:
    text    data     bss     dec     hex filename
    1031     324       0    1355     54b centaur.o.before
    1031     324       0    1355     54b centaur.o.after

 md5:
  4f306a7f980b58eb69c4bdcfcde565f1  centaur.o.before.asm
  4f306a7f980b58eb69c4bdcfcde565f1  centaur.o.after.asm

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:47 +02:00
Paolo Ciarrocchi
29a9994bd8 x86: coding style fixes for arch/x86/kernel/cpu/centaur.c
Kills more than 150 errors/warnings

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:47 +02:00
Ingo Molnar
ca5d3f1491 x86: clean up mmx_32.c
checkpatch.pl --file cleanups:

  before:
    total: 74 errors, 3 warnings, 386 lines checked

  after:
    total: 0 errors, 0 warnings, 377 lines checked

no code changed:

arch/x86/lib/mmx_32.o:
   text    data     bss     dec     hex filename
   1323       0       8    1331     533 mmx_32.o.before
   1323       0       8    1331     533 mmx_32.o.after

md5:
   4cc39f1017dc40a5ebf02ce0ff7312bc  mmx_32.o.before.asm
   4cc39f1017dc40a5ebf02ce0ff7312bc  mmx_32.o.after.asm

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:47 +02:00
David P. Reed
04aaa7ba09 x86: fix cmos read and write to not use inb_p and outb_p
fix code to access CMOS rtc registers so that it does not use inb_p and
outb_p routines, which are deprecated.  Extensive research on all known
CMOS RTC chipset timing shows that there is no need for a delay in
accessing the registers of these chips even on old machines. These chipa
are never on an expansion bus, but have always been "motherboard"
resources, either in the processor chipset or explicitly on the
motherboard, and they are not part of the ISA/LPC or PCI buses, so
delays should not be based on bus timing. The reason to fix it:

 1) port 80 writes often hang some laptops that use ENE EC chipsets,
    esp. those designed and manufactured by Quanta for HP;

 2) RTC accesses are timing sensitive, and extra microseconds may matter;

 3) the new "io_delay" function is calibrated by expansion bus timing needs,
    thus is not appropriate for access to CMOS rtc registers.

Signed-off-by: David P. Reed <dpreed@reed.com>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:47 +02:00
Thomas Petazzoni
03ae5768b6 x86: use ELF section to list CPU vendor specific code
Replace the hardcoded list of initialization functions for each CPU
vendor by a list in an ELF section, which is read at initialization in
arch/x86/kernel/cpu/cpu.c to fill the cpu_devs[] array. The ELF
section, named .x86cpuvendor.init, is reclaimed after boot, and
contains entries of type "struct cpu_vendor_dev" which associates a
vendor number with a pointer to a "struct cpu_dev" structure.

This first modification allows to remove all the VENDOR_init_cpu()
functions.

This patch also removes the hardcoded calls to early_init_amd() and
early_init_intel(). Instead, we add a "c_early_init" member to the
cpu_dev structure, which is then called if not NULL by the generic CPU
initialization code. Unfortunately, in early_cpu_detect(), this_cpu is
not yet set, so we have to use the cpu_devs[] array directly.

This patch is part of the Linux Tiny project, and is needed for
further patch that will allow to disable compilation of unused CPU
support code.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:47 +02:00
Glauber Costa
bc7c314d70 x86, vsmp: use the paravirt helpers
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ravikiran Thirumalai <kiran@scalemp.com>
Acked-by: Shai Fultheim <shai@scalemp.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:47 +02:00
Glauber Costa
96597fd2be x86: introduce vsmp paravirt helpers
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ravikiran Thirumalai <kiran@scalemp.com>
Acked-by: Shai Fultheim <shai@scalemp.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:47 +02:00
Glauber Costa
2785c8d052 x86: call vsmp_init explicitly
It becomes to early for ioremap, so we use early_ioremap

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ravikiran Thirumalai <kiran@scalemp.com>
Acked-by: Shai Fultheim <shai@scalemp.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:47 +02:00
Glauber Costa
a2beab31b1 x86: make vsmp_init void, instead of static int
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ravikiran Thirumalai <kiran@scalemp.com>
Acked-by: Shai Fultheim <shai@scalemp.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:47 +02:00
Glauber Costa
270883a8b9 x86: change vsmp compile dependency
Change Makefile so vsmp_64.o object is dependent
on PARAVIRT, rather than X86_VSMP

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ravikiran Thirumalai <kiran@scalemp.com>
Acked-by: Shai Fultheim <shai@scalemp.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:47 +02:00
Robert Richter
e319e76521 x86: apic: extended interrupt LVT support for AMD
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:47 +02:00
Yinghai Lu
04adf11435 x86: remove never used nodenumer in pda
Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:47 +02:00
Yinghai Lu
beafe91f1c x86: get apic_id later in acpi_numa_processor_affinity_init
we don't need get that so early.

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:47 +02:00
Arnaldo Carvalho de Melo
28d2312881 x86: reducing debuginfo size by removing unneeded includes
I found it strange that the struct sk_buff definition was found
inside the DWARF debugging sections in the generated object, so I verified
and found that there is no need for the files that bring struct sk_buff
definition into this file and verified also that sk_buff is not brought
in indirectly too, thru other headers.

	I went on and removed many other unneeded includes and the end
result is:

[acme@doppio net-2.6]$ l /tmp/sys_ia32.o.before /tmp/sys_ia32.o.after
-rw-rw-r-- 1 acme acme 185240 2008-02-06 19:19 /tmp/sys_ia32.o.after
-rw-rw-r-- 1 acme acme 248328 2008-02-06 19:00 /tmp/sys_ia32.o.before

	Almost 64KB only on this object file!

	There were no other side effects from this change:

[acme@doppio net-2.6]$ objcopy -j "text" /tmp/sys_ia32.o.before /tmp/text.before
[acme@doppio net-2.6]$ objcopy -j "text" /tmp/sys_ia32.o.after /tmp/text.after
[acme@doppio net-2.6]$ md5sum /tmp/text.before /tmp/text.after
b7ac9b17942add68494e698e4f965d36  /tmp/text.before
b7ac9b17942add68494e698e4f965d36  /tmp/text.after

	One of the complaints about using tools such as systemtap is
that one has to install the huge kernel-debuginfo package:

[acme@doppio net-2.6]$ rpm -q --qf "%{size}\n" kernel-rt-debuginfo
471737710
543867594
[acme@doppio net-2.6]$

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:46 +02:00
Ingo Molnar
52b387197b x86: bump image header to version 2.08.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:46 +02:00
Ian Campbell
7d6e737c8d x86: add a crc32 checksum to the kernel image.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:46 +02:00
Ian Campbell
099e137726 x86: use ELF format in compressed images.
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Cc: Ian Campbell <ijc@hellion.org.uk>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: virtualization@lists.linux-foundation.org
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:46 +02:00
Harvey Harrison
e0bf0f75bd x86: define DEBUG_SIG in signal_64.c
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:46 +02:00
Harvey Harrison
866bc13fc4 x86: Unify argument names in signal_32|64.c
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:46 +02:00
Harvey Harrison
123a63476c x86: move struct definitions to unifed sigframe.h
[ tglx@linutronix.de: cleanup the other structs as well ]

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:46 +02:00
Harvey Harrison
2d19c45806 x86: use sizeof(long) to unify signal_32|64.c
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:46 +02:00
Harvey Harrison
1a1768039c x86: Use FIX_EFLAGS define in X86_64
[ tglx@linutronix.de: simplified ]

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:46 +02:00
Harvey Harrison
ac66f3fd89 x86: reduce trivial style differences in signal_32|64.c
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:46 +02:00
Harvey Harrison
c3e6ff87a3 x86: regparm(3) is mandatory, no need to annotate
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:45 +02:00
Harvey Harrison
9902a702c7 x86: make X86_32 pt_regs members unsigned long
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:45 +02:00
Harvey Harrison
92bc205685 x86: change most X86_32 pt_regs members to unsigned long
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:45 +02:00
Andi Kleen
45de707911 x86: enable ACPI extended century handling for 32bit
The extended century readout does not solve the year 2038 problem on
32bit!

v2: Fix compilation on !ACPI, pointed out by tglx

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:45 +02:00
Andi Kleen
068c9222d0 x86: add warning when RTC clock reports binary
We assume that the RTC clock is BCD, so print a warning if it claims
to be binary.

[ tglx@linutronix.de: changed to WARN_ON - we want to know that!
  If no one reports it we can remove the complete if (RTC_ALWAYS_BCD)
  magic, which has RTC_ALWAYS_BCD defined to 1 since Linux 1.0 ... ]

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:45 +02:00
Andi Kleen
b62576a2f5 x86: use year 2000 offset for cmos clock
We know it is already after 2000. Use the year 2000 offset for both 32
and 64 bit, which removes ifdefs and the 1970 magic.

[ tglx@linutronix.de: remove 1970 magic, replace bogus commit message ]

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:45 +02:00
Yinghai Lu
48c508b364 x86: clean up find_e820_area(), 64-bit
Change size to unsigned long, becase caller and user all used unsigned long.
Also make bad_addr take an alignment parameter.

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:45 +02:00
Andi Kleen
ef9257668e x86: do kernel direct mapping at boot using GB pages
The AMD Fam10h CPUs support new Gigabyte page table entry for
mapping 1GB at a time. Use this for the kernel direct mapping.

Only done for 64bit because i386 does not support GB page tables.

This only applies to the data portion of the direct mapping; the
kernel text mapping stays with 2MB pages because the AMD Fam10h
microarchitecture does not support GB ITLBs and AMD recommends
against using GB mappings for code.

Can be disabled with disable_gbpages on the kernel command line

[ tglx@linutronix.de: simplify enable code ]
[ Yinghai Lu <yinghai.lu@sun.com>: boot fix on 256 GB RAM ]

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:45 +02:00
Ingo Molnar
00d1c5e057 x86: add gbpages switches
These new controls toggle experimental support for a new CPU feature,
the straightforward extension of largepages from the pmd level to the
pud level, which allows 1GB (kernel) TLBs instead of 2MB TLBs.

Turn it off by default, as this code has not been tested well enough yet.

Use the CONFIG_DIRECT_GBPAGES=y .config option or gbpages on the
boot line can be used to enable it. If enabled in the .config then
nogbpages boot option disables it.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:45 +02:00
H. Peter Anvin
fe770bf031 x86: clean up the page table dumper and add 32-bit support
Clean up the page table dumper (fix boundary conditions, table driven
address ranges, some formatting changes since it is no longer using
the kernel log but a separate virtual file), and generalize to 32
bits.

[ mingo@elte.hu: x86: fix the pagetable dumper ]

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:45 +02:00
Arjan van de Ven
926e5392ba x86: add code to dump the (kernel) page tables for visual inspection by kernel developers
This patch adds code to the kernel to have an (optional)
/proc/kernel_page_tables debug file that basically dumps the kernel
pagetables; this allows us kernel developers to verify that nothing fishy is
going on and that the various mappings are set up correctly. This was quite
useful in finding various change_page_attr() bugs, and is very likely to be
useful in the future as well.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: mingo@elte.hu
Cc: tglx@tglx.de
Cc: hpa@zytor.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:45 +02:00
H. Peter Anvin
2596e0fae0 x86: unify arch/x86/mm/Makefile
Unify arch/x86/mm/Makefile between 32 and 64 bits.

All configuration variables that are protected by Kconfig constraints
have been put in the common part of the Makefile; however, the NUMA
files are totally different between 32 and 64 bits and are handled via
an ifdef.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:45 +02:00
Thomas Gleixner
ee7ae7a198 x86: add debug info to DEBUG_PAGEALLOC
Add debug information for DEBUG_PAGEALLOC to get some statistics about
the pool usage and split status.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-17 17:40:45 +02:00
Roland McGrath
5de253cc5b x86 vDSO: don't map 32-bit vdso when disabled
We map a VMA for the 32-bit vDSO even when it's disabled, which is stupid.
For the 32-bit kernel it's the vdso_enabled boot parameter/sysctl
and for the 64-bit kernel it's the vdso32 boot parameter/syscall32 sysctl.

When it's disabled, we don't pass AT_SYSINFO_EHDR so processes don't use
the vDSO for anything, but we still map it.  For the non-compat vDSO,
this means we're always putting an extra VMA somewhere, maybe lousing
up the control of the address space the user was hoping for.

Honor the setting by doing nothing in arch_setup_additional_pages.

[ also see: "x86 vDSO: don't use disabled vDSO for signal trampoline" ]

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:45 +02:00
Roland McGrath
1a3e4ca41c x86 vDSO: don't use disabled vDSO for signal trampoline
If the vDSO was not mapped, don't use it as the "restorer" for a signal
handler.  Whether we have a pointer in mm->context.vdso depends on what
happened at exec time, so we shouldn't check any global flags now.

Background:

Currently, every 32-bit exec gets the vDSO mapped even if it's disabled
(the process just doesn't get told about it).  Because it's in fact
always there, the bug that this patch fixes cannot happen now.  With
the second patch, it won't be mapped at all when it's disabled, which is
one of the things that people might really want when they disable it (so
nothing they didn't ask for goes into their address space).

The 32-bit signal handler setup when SA_RESTORER is not used refers to
current->mm->context.vdso without regard to whether the vDSO has been
disabled when the process was exec'd.  This patch fixes this not to use
it when it's null, which becomes possible after the second patch. (This
never happens in normal use, because glibc's sigaction call uses
SA_RESTORER unless glibc detected the vDSO.)

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:45 +02:00
Ingo Molnar
85eb69a16a x86: increase the kernel text limit to 512 MB
people sometimes do crazy stuff like building really large static
arrays into their kernels or building allyesconfig kernels. Give
more space to the kernel and push modules up a bit: kernel has
512 MB and modules have 1.5 GB.

Should be enough for a few years ;-)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:45 +02:00
Ingo Molnar
b4e0409a36 x86: check vmlinux limits, 64-bit
these build-time and link-time checks would have prevented the
vmlinux size regression.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:45 +02:00
Björn Steinbrink
223ac2f42d x86, pci: fix off-by-one errors in some pirq warnings
fix bogus pirq warnings reported in:

  http://bugzilla.kernel.org/show_bug.cgi?id=10366

safe to be backported to v2.6.25 and earlier.

Cc: stable@kernel.org
Signed-off-by: Björn Steinbrink <B.Steinbrink@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:40:45 +02:00
yakui.zhao@intel.com
b87e81e5c6 acpi: unneccessary to scan the PCI bus already scanned
http://bugzilla.kernel.org/show_bug.cgi?id=10124

this change:

      commit 08f1c192c3
      Author: Muli Ben-Yehuda <muli@il.ibm.com>
      Date:   Sun Jul 22 00:23:39 2007 +0300

         x86-64: introduce struct pci_sysdata to facilitate sharing of ->sysdata

         This patch introduces struct pci_sysdata to x86 and x86-64, and
         converts the existing two users (NUMA, Calgary) to use it.

         This lays the groundwork for having other users of sysdata, such as
         the PCI domains work.

         The Calgary bits are tested, the NUMA bits just look ok.

replaces pcibios_scan_root by pci_scan_bus_parented...

but in pcibios_scan_root we have a check about scanned busses.

Cc: <yakui.zhao@intel.com>
Cc: Stian Jordet <stian@jordet.net>
Cc: Len Brown <lenb@kernel.org>
Cc: Greg KH <greg@kroah.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "Yinghai Lu" <yhlu.kernel@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-15 19:35:41 -07:00
Roland McGrath
54a0151041 asmlinkage_protect replaces prevent_tail_call
The prevent_tail_call() macro works around the problem of the compiler
clobbering argument words on the stack, which for asmlinkage functions
is the caller's (user's) struct pt_regs.  The tail/sibling-call
optimization is not the only way that the compiler can decide to use
stack argument words as scratch space, which we have to prevent.
Other optimizations can do it too.

Until we have new compiler support to make "asmlinkage" binding on the
compiler's own use of the stack argument frame, we have work around all
the manifestations of this issue that crop up.

More cases seem to be prevented by also keeping the incoming argument
variables live at the end of the function.  This makes their original
stack slots attractive places to leave those variables, so the compiler
tends not clobber them for something else.  It's still no guarantee, but
it handles some observed cases that prevent_tail_call() did not.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-10 17:28:26 -07:00
Venki Pallipadi
783e391b7b x86: Simplify cpu_idle_wait
This patch also resolves hangs on boot:
	http://lkml.org/lkml/2008/2/23/263
	http://bugzilla.kernel.org/show_bug.cgi?id=10093

The bug was causing once-in-few-reboots 10-15 sec wait during boot on
certain laptops.

Earlier commit 40d6a14662 added
smp_call_function in cpu_idle_wait() to kick cpus that are in tickless
idle.  Looking at cpu_idle_wait code at that time, code seemed to be
over-engineered for a case which is rarely used (while changing idle
handler).

Below is a simplified version of cpu_idle_wait, which just makes a dummy
smp_call_function to all cpus, to make them come out of old idle handler
and start using the new idle handler.  It eliminates code in the idle
loop to handle cpu_idle_wait.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-10 15:38:29 -07:00
Steven Rostedt
f4be31ec96 pop previous section in alternative.c
gcc expects all toplevel assembly to return to the original section type.
The code in alteranative.c does not do this. This caused some strange bugs
in sched-devel where code would end up in the .rodata section and when
the kernel sets the NX bit on all .rodata, the kernel would crash when
executing this code.

This patch adds a .previous marker to return the code back to the
original section.

Credit goes to Andrew Pinski for telling me it wasn't a gcc bug but a
bug in the toplevel asm code in the kernel.  ;-)

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-09 18:38:08 -07:00
Karsten Wiese
4f41c94d5c x86: fix call to set_cyc2ns_scale() from time_cpufreq_notifier()
In time_cpufreq_notifier() the cpu id to act upon is held in freq->cpu. Use it
instead of smp_processor_id() in the call to set_cyc2ns_scale().
This makes the preempt_*able() unnecessary and lets set_cyc2ns_scale() update
the intended cpu's cyc2ns.

Related mail/thread: http://lkml.org/lkml/2007/12/7/130

Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-07 21:09:14 +02:00
Ingo Molnar
5b13d86357 revert "x86: tsc prevent time going backwards"
revert:

| commit 47001d6033
| Author: Thomas Gleixner <tglx@linutronix.de>
| Date:   Tue Apr 1 19:45:18 2008 +0200
|
|     x86: tsc prevent time going backwards

it has been identified to cause suspend regression - and the
commit fixes a longstanding bug that existed before 2.6.25 was
opened - so it can wait some more until the effects are better
understood.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-07 21:09:14 +02:00
Rusty Russell
64ba4f230d Fix booting pentium+ with dodgy TSC
We handle a broken tsc these days, so no need to panic.  We clear the
TSC bit when tsc_init decides it's unreliable (eg.  under lguest w/ bad
host TSC), leading to bogus panic.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-06 16:10:40 -07:00
Thomas Gleixner
5761d64b27 x86: revert assign IRQs to hpet timer
The commits:

commit 37a47db8d7
Author: Balaji Rao <balajirrao@gmail.com>
Date:   Wed Jan 30 13:30:03 2008 +0100

    x86: assign IRQs to HPET timers, fix

and

commit e3f37a54f6
Author: Balaji Rao <balajirrao@gmail.com>
Date:   Wed Jan 30 13:30:03 2008 +0100

    x86: assign IRQs to HPET timers

have been identified to cause a regression on some platforms due to
the assignement of legacy IRQs which makes the legacy devices
connected to those IRQs disfunctional.

Revert them.

This fixes http://bugzilla.kernel.org/show_bug.cgi?id=10382

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-04 18:36:49 +02:00
Thomas Gleixner
47001d6033 x86: tsc prevent time going backwards
We already catch most of the TSC problems by sanity checks, but there
is a subtle bug which has been in the code for ever. This can cause
time jumps in the range of hours.

This was reported in:
     http://lkml.org/lkml/2007/8/23/96
and
     http://lkml.org/lkml/2008/3/31/23

I was able to reproduce the problem with a gettimeofday loop test on a
dual core and a quad core machine which both have sychronized
TSCs. The TSCs seems not to be perfectly in sync though, but the
kernel is not able to detect the slight delta in the sync check. Still
there exists an extremly small window where this delta can be observed
with a real big time jump. So far I was only able to reproduce this
with the vsyscall gettimeofday implementation, but in theory this
might be observable with the syscall based version as well.

CPU 0 updates the clock source variables under xtime/vyscall lock and
CPU1, where the TSC is slighty behind CPU0, is reading the time right
after the seqlock was unlocked.

The clocksource reference data was updated with the TSC from CPU0 and
the value which is read from TSC on CPU1 is less than the reference
data. This results in a huge delta value due to the unsigned
subtraction of the TSC value and the reference value. This algorithm
can not be changed due to the support of wrapping clock sources like
pm timer.

The huge delta is converted to nanoseconds and added to xtime, which
is then observable by the caller. The next gettimeofday call on CPU1
will show the correct time again as now the TSC has advanced above the
reference value.

To prevent this TSC specific wreckage we need to compare the TSC value
against the reference value and return the latter when it is larger
than the actual TSC value.

I pondered to mark the TSC unstable when the readout is smaller than
the reference value, but this would render an otherwise good and fast
clocksource unusable without a real good reason.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-04 18:36:49 +02:00
Mark McLoughlin
c946c7de49 xen: Clear PG_pinned in release_{pt,pd}()
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Cc: xen-devel@lists.xensource.com
Cc: Mark McLoughlin <markmc@redhat.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-04 18:36:48 +02:00
Mark McLoughlin
a684d69d15 xen: Do not pin/unpin PMD pages
i.e. with this simple test case:

    int fd = open("/dev/zero", O_RDONLY);
    munmap(mmap((void *)0x40000000, 0x1000_LEN, PROT_READ, MAP_PRIVATE, fd, 0), 0x1000);
    close(fd);

we currently get:

   kernel BUG at arch/x86/xen/enlighten.c:678!
   ...
   EIP is at xen_release_pt+0x79/0xa9
   ...
   Call Trace:
    [<c041da25>] ? __pmd_free_tlb+0x1a/0x75
    [<c047a192>] ? free_pgd_range+0x1d2/0x2b5
    [<c047a2f3>] ? free_pgtables+0x7e/0x93
    [<c047b272>] ? unmap_region+0xb9/0xf5
    [<c047c1bd>] ? do_munmap+0x193/0x1f5
    [<c047c24f>] ? sys_munmap+0x30/0x3f
    [<c0408cce>] ? syscall_call+0x7/0xb
    =======================

and xen complains:

  (XEN) mm.c:2241:d4 Mfn 1cc37 not pinned

Further details at:

  https://bugzilla.redhat.com/436453

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Cc: xen-devel@lists.xensource.com
Cc: Mark McLoughlin <markmc@redhat.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-04 18:36:48 +02:00
Mark McLoughlin
f64337062c xen: refactor xen_{alloc,release}_{pt,pd}()
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Cc: xen-devel@lists.xensource.com
Cc: Mark McLoughlin <markmc@redhat.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-04 18:36:48 +02:00
Pavel Machek
8f59610de2 x86, agpgart: scary messages are fortunately obsolete
Fix obsolete printks in aperture-64. We used not to handle missing
agpgart, but we handle it okay now.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-04 18:36:46 +02:00
Ingo Molnar
9c9b81f773 x86: print message if nmi_watchdog=2 cannot be enabled
right now if there's no CPU support for nmi_watchdog=2 we'll just
refuse it silently.

print a useful warning.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-04 18:36:45 +02:00
Ingo Molnar
4f14bdef41 x86: fix nmi_watchdog=2 on Pentium-D CPUs
implement nmi_watchdog=2 on this class of CPUs:

  cpu family      : 15
  model           : 6
  model name      : Intel(R) Pentium(R) D CPU 3.00GHz

the watchdog's ->setup() method is safe anyway, so if the CPU
cannot support it we'll bail out safely.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-04 18:36:45 +02:00
Roland McGrath
4ba51fd75c x86 ptrace: avoid unnecessary wrmsr
This avoids using wrmsr on MSR_IA32_DEBUGCTLMSR when it's not needed.
No wrmsr ever needs to be done if noone has ever used block stepping.

Without this change, using ptrace on 2.6.25 on an x86 KVM guest
will tickle KVM's missing support for the MSR and crash the guest
kernel.  Though host KVM is the buggy one, this makes for a regression
in the guest behavior from 2.6.24->2.6.25 that we can easily avoid.

I also corrected some bad whitespace.

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-03 15:42:43 -07:00
Ken'ichi Ohmichi
629c8b4cdb vmcoreinfo: add the symbol "phys_base"
Fix the problem that makedumpfile sometimes fails on x86_64 machine.

This patch adds the symbol "phys_base" to a vmcoreinfo data.  The
vmcoreinfo data has the minimum debugging information only for dump
filtering.  makedumpfile (dump filtering command) gets it to distinguish
unnecessary pages, and makedumpfile creates a small dumpfile.

On x86_64 kernel which compiled with CONFIG_PHYSICAL_START=0x0 and
CONFIG_RELOCATABLE=y, makedumpfile fails like the following:

 # makedumpfile -d31 /proc/vmcore dumpfile
 The kernel version is not supported.
 The created dumpfile may be incomplete.
 _exclude_free_page: Can't get next online node.

 makedumpfile Failed.
 #

The cause is the lack of the symbol "phys_base" in a vmcoreinfo data.
If the symbol "phys_base" does not exist, makedumpfile considers an
x86_64 kernel as non relocatable.  As the result, makedumpfile
misunderstands the physical address where the kernel is loaded, and it
cannot translate a kernel virtual address to physical address correctly.

To fix this problem, this patch adds the symbol "phys_base" to a
vmcoreinfo data.

Signed-off-by: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: <stable@kernel.org>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-02 15:28:19 -07:00
Andrew Morton
9c312058b2 Avoid false positive warnings in kmap_atomic_prot() with DEBUG_HIGHMEM
I believe http://bugzilla.kernel.org/show_bug.cgi?id=10318 is a false
positive.  There's no way in which networking will be using highmem pages
here, so it won't be taking the KM_USER0 kmap slot, so there's no point in
performing these checks.

Cc: Pawel Staszewski <pstaszewski@artcom.pl>
Cc: Ingo Molnar <mingo@elte.hu>
Acked-by: Christoph Lameter <clameter@sgi.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 [ Really sad.  We lose almost all real-life coverage of the debug tests
   with this patch. Now it will only report problems for the cases where
   people actually end up using a HIGHMEM page, not when they just _might_
   use one.    - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-28 13:08:14 -07:00
Rusty Russell
a6bd8e1303 lguest: comment documentation update.
Took some cycles to re-read the Lguest Journey end-to-end, fix some
rot and tighten some phrases.

Only comments change.  No new jokes, but a couple of recycled old jokes.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2008-03-28 11:05:54 +11:00
Ingo Molnar
3085354de6 x86: prefetch fix #2
Linus noticed a second bug and an uncleanliness:

 - we'd return on any instruction fetch fault

 - we'd use both the value of 16 and the PF_INSTR symbol which are
   the same and make no sense

the cleanup nicely unifies this piece of logic.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-27 22:00:16 +01:00
Jeremy Fitzhardinge
2e8fe719b5 xen: fix UP setup of shared_info
We need to set up the shared_info pointer once we've mapped the real
shared_info into its fixmap slot.  That needs to happen once the general
pagetable setup has been done.  Previously, the UP shared_info was set
up one in xen_start_kernel, but that was left pointing to the dummy
shared info.  Unfortunately there's no really good place to do a later
setup of the shared_info in UP, so just do it once the pagetable setup
has been done.

[ Stable: needed in 2.6.24.x ]

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stable Kernel <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-27 16:08:45 +01:00
Jeremy Fitzhardinge
04c44a080d xen: fix RMW when unmasking events
xen_irq_enable_direct and xen_sysexit were using "andw $0x00ff,
XEN_vcpu_info_pending(vcpu)" to unmask events and test for pending ones
in one instuction.

Unfortunately, the pending flag must be modified with a locked operation
since it can be set by another CPU, and the unlocked form of this
operation was causing the pending flag to get lost, allowing the processor
to return to usermode with pending events and ultimately deadlock.

The simple fix would be to make it a locked operation, but that's rather
costly and unnecessary.  The fix here is to split the mask-clearing and
pending-testing into two instructions; the interrupt window between
them is of no concern because either way pending or new events will
be processed.

This should fix lingering bugs in using direct vcpu structure access too.

[ Stable: needed in 2.6.24.x ]

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stable <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-27 16:08:45 +01:00
Christoph Lameter
25e59881f1 x86: stricter check in follow_huge_addr()
The first page of the compound page is determined in follow_huge_addr()
but then PageCompound() only checks if the page is part of a compound page.
PageHead() allows checking if this is indeed the first page of the
compound.

Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-27 16:08:45 +01:00
Florian Fainelli
b2ef749720 rdc321x: GPIO routines bugfixes
This patch fixes the use of GPIO routines which are in the PCI
configuration space of the RDC321x, therefore reading/writing
to this space without spinlock protection can be problematic.

We also now request and free GPIOs and support the MGB100
board, previous code was very AR525W-centric.

Signed-off-by: Volker Weiss <volker@tintuc.de>
Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-27 16:08:45 +01:00
Andrew Morton
d8d4f157b8 x86: ptrace.c: fix defined-but-unused warnings
arch/x86/kernel/ptrace.c:548: warning: 'ptrace_bts_get_size' defined but not used
arch/x86/kernel/ptrace.c:558: warning: 'ptrace_bts_read_record' defined but not used
arch/x86/kernel/ptrace.c:607: warning: 'ptrace_bts_clear' defined but not used
arch/x86/kernel/ptrace.c:617: warning: 'ptrace_bts_drain' defined but not used
arch/x86/kernel/ptrace.c:720: warning: 'ptrace_bts_config' defined but not used
arch/x86/kernel/ptrace.c:788: warning: 'ptrace_bts_status' defined but not used

Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-27 16:08:44 +01:00
Ingo Molnar
bc713dcf35 x86: fix prefetch workaround
some early Athlon XP's and Opterons generate bogus faults on prefetch
instructions. The workaround for this regressed over .24 - reinstate it.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-27 16:08:44 +01:00
Suresh Siddha
d546b67a94 x86: fix performance drop for glx
fix the 3D performance drop reported at:

   http://bugzilla.kernel.org/show_bug.cgi?id=10328

fb drivers are using ioremap()/ioremap_nocache(), followed by mtrr_add with
WC attribute. Recent changes in page attribute code made both
ioremap()/ioremap_nocache() mappings as UC (instead of previous UC-). This
breaks the graphics performance, as the effective memory type is UC instead
of expected WC.

The correct way to fix this is to add ioremap_wc() (which uses UC- in the
absence of PAT kernel support and WC with PAT) and change all the
fb drivers to use this new ioremap_wc() API.

We can take this correct and longer route for post 2.6.25. For now,
revert back to the UC- behavior for ioremap/ioremap_nocache.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-26 22:23:41 +01:00
Yinghai Lu
76c324182b x86: fix trim mtrr not to setup_memory two times
we could call find_max_pfn() directly instead of setup_memory() to get
max_pfn needed for mtrr trimming.

otherwise setup_memory() is called two times... that is duplicated...

[ mingo@elte.hu: both Thomas and me simulated a double call to
  setup_bootmem_allocator() and can confirm that it is a real bug
  which can hang in certain configs. It's not been reported yet but
  that is probably due to the relatively scarce nature of
  MTRR-trimming systems. ]

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-26 22:23:41 +01:00
Andres Salomon
923a0cf82f x86: GEODE: add missing module.h include
On Wed, 26 Mar 2008 11:56:22 -0600
Jordan Crouse <jordan.crouse@amd.com> wrote:

> On 26/03/08 14:31 +0100, Stefan Pfetzing wrote:
> > Hello Jordan,
> >
> > I just tried to build your geodwdt driver for the geode watchdog. Therefore
> > I pulled your repository from http://git.infradead.org/geode.git (or more,
> > the git url).
> >
> > I tried to build the geodewdt driver as a module - which didn't work, and
> > it failed with the same problem as earlier mentioned on lkmk [1]. I also
> > checked the fix [2], but that seems to be already in your (or linus) tree -
> > and so I'm unsure what the problem is.
> >
> > [1] http://kerneltrap.org/mailarchive/linux-kernel/2008/2/17/884074
> > [2] http://kerneltrap.org/mailarchive/linux-kernel/2008/2/17/884174
> >
> > Building directly into the kernel seems to work.
> >
> > Maybe you have some idea?
>
> Hmm - that is strange.  Exporting the symbols should work.  I recommend
> starting over with a clean tree.
>
> CCing Andres - any thoughts?
>
> Jordan
>

Er, yeah.  The patch below should fix it.  This should probably go into
2.6.25.

Oops, EXPORT_SYMBOL_GPL wasn't being declared due to this header
being missing.

Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-26 22:23:40 +01:00
Stephan Diestelhorst
c6e8256a7b x86, cpufreq: fix Speedfreq-SMI call that clobbers ECX
I have found that using SMI to change the cpu's frequency on my DELL
Latitude L400 clobbers the ECX register in speedstep_set_state, causing
unneccessary retries because the "state" variable has changed silently (GCC
assumes it is still present in ECX).

play safe and avoid gcc caching any register across IO port accesses
that trigger SMIs.

Signed-off by: <Stephan.Diestelhorst@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-26 22:23:40 +01:00
Yinghai Lu
475613b9e3 x86: fix memoryless node oops during boot
fix oops during boot reported in this thread:

  http://lkml.org/lkml/2008/2/6/65

enable booting on memoryless nodes.

Reported-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-26 22:23:40 +01:00
Ingo Molnar
3c274c2909 x86: add dmi quirk for io_delay
reported by mereandor@gmail.com, in:

  http://bugzilla.kernel.org/show_bug.cgi?id=6307

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-26 22:23:40 +01:00
Randy Dunlap
1d3381ebf4 x86: convert mtrr/generic.c to kernel-doc
Convert function comment blocks to kernel-doc notation.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-26 22:23:40 +01:00
Avi Kivity
e48bb497b9 KVM: MMU: Fix memory leak on guest demand faults
While backporting 72dc67a696, a gfn_to_page()
call was duplicated instead of moved (due to an unrelated patch not being
present in mainline).  This caused a page reference leak, resulting in a
fairly massive memory leak.

Fix by removing the extraneous gfn_to_page() call.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 10:22:17 +02:00
Marcelo Tosatti
707a18a51d KVM: VMX: convert init_rmode_tss() to slots_lock
init_rmode_tss was forgotten during the conversion from mmap_sem to
slots_lock.

INFO: task qemu-system-x86:3748 blocked for more than 120 seconds.
Call Trace:
 [<ffffffff8053d100>] __down_read+0x86/0x9e
 [<ffffffff8053fb43>] do_page_fault+0x346/0x78e
 [<ffffffff8053d235>] trace_hardirqs_on_thunk+0x35/0x3a
 [<ffffffff8053dcad>] error_exit+0x0/0xa9
 [<ffffffff8035a7a7>] copy_user_generic_string+0x17/0x40
 [<ffffffff88099a8a>] :kvm:kvm_write_guest_page+0x3e/0x5f
 [<ffffffff880b661a>] :kvm_intel:init_rmode_tss+0xa7/0xf9
 [<ffffffff880b7d7e>] :kvm_intel:vmx_vcpu_reset+0x10/0x38a
 [<ffffffff8809b9a5>] :kvm:kvm_arch_vcpu_setup+0x20/0x53
 [<ffffffff8809a1e4>] :kvm:kvm_vm_ioctl+0xad/0x1cf
 [<ffffffff80249dea>] __lock_acquire+0x4f7/0xc28
 [<ffffffff8028fad9>] vfs_ioctl+0x21/0x6b
 [<ffffffff8028fd75>] do_vfs_ioctl+0x252/0x26b
 [<ffffffff8028fdca>] sys_ioctl+0x3c/0x5e
 [<ffffffff8020b01b>] system_call_after_swapgs+0x7b/0x80

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 10:22:17 +02:00
Marcelo Tosatti
15aaa819e2 KVM: MMU: handle page removal with shadow mapping
Do not assume that a shadow mapping will always point to the same host
frame number.  Fixes crash with madvise(MADV_DONTNEED).

[avi: move after first printk(), add another printk()]

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 10:22:17 +02:00
Avi Kivity
4b1a80fa65 KVM: MMU: Fix is_rmap_pte() with io ptes
is_rmap_pte() doesn't take into account io ptes, which have the avail bit set.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 10:22:16 +02:00
Avi Kivity
5dc8326282 KVM: VMX: Restore tss even on x86_64
The vmx hardware state restore restores the tss selector and base address, but
not its length.  Usually, this does not matter since most of the tss contents
is within the default length of 0x67.  However, if a process is using ioperm()
to grant itself I/O port permissions, an additional bitmap within the tss,
but outside the default length is consulted.  The effect is that the process
will receive a SIGSEGV instead of transparently accessing the port.

Fix by restoring the tss length.  Note that i386 had this working already.

Closes bugzilla 10246.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 10:22:16 +02:00
Linus Torvalds
b9e76a0074 x86-32: Pass the full resource data to ioremap()
It appears that 64-bit PCI resources cannot possibly ever have worked on
x86-32 even when the RESOURCES_64BIT config option was set, because any
driver that tried to [pci_]ioremap() the resource would have been unable
to do so because the high 32 bits would have been silently dropped on
the floor by the ioremap() routines that only used "unsigned long".

Change them to use "resource_size_t" instead, which properly encodes the
whole 64-bit resource data if RESOURCES_64BIT is enabled.

Acked-by: H. Peter Anvin <hpa@kernel.org>
Acked-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-24 11:22:39 -07:00
Thomas Gleixner
9e9630481e x86: revert: reserve dma32 early for gart
Revert

commit f62f1fc9ef
Author: Yinghai Lu <yhlu.kernel@gmail.com>
Date:   Fri Mar 7 15:02:50 2008 -0800

    x86: reserve dma32 early for gart

The patch has a dependency on bootmem modifications which are not .25
material that late in the -rc cycle. The problem which is addressed by
the patch is limited to machines with 256G and more memory booted with
NUMA disabled. This is not a .25 regression and the audience which is
affected by this problem is very limited, so it's safer to do the
revert than pulling in intrusive bootmem changes right now.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-22 19:25:41 +01:00
Yinghai Lu
37bff62e98 x86_64: free_bootmem should take phys
so use nodedata_phys directly.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-21 17:06:15 +01:00
Yinghai Lu
5dca6a1bb0 x86: trim mtrr don't close gap for resource allocation.
fix the bug reported here:

	http://bugzilla.kernel.org/show_bug.cgi?id=10232

use update_memory_range() instead of add_memory_range() directly
to avoid closing the gap.

( the new code only affects and runs on systems where the MTRR
  workaround triggers. )

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-21 17:06:15 +01:00
Heinz-Ado Arnolds
fc1c8925c8 x86: fix reboot problem with Dell Optiplex 745, 0KW626 board
we have seen a little problem in rebooting Dell Optiplex 745 with the
0KW626 board. Here is a small patch enabling reboot with this board,
which forces the default reboot path it into the BIOS reboot mode.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-21 17:06:15 +01:00
Jiri Slaby
e215f3c2c5 x86: fix fault_msg nul termination
The fault_msg text is not explictly nul terminated now in startup
assembly. Do so by converting .ascii to .asciz.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-21 17:06:15 +01:00
Pavel Machek
2050d45d7c x86: fix long standing bug with usb after hibernation with 4GB ram
aperture_64.c takes a piece of memory and makes it into iommu
window... but such window may not be saved by swsusp -- that leads to
oops during hibernation.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-21 17:06:15 +01:00
Zbigniew Luszpinski
96bcf458cb x86: hpet clock enable quirk on nVidia nForce 430
this patch allows hpet=force on nVidia nForce 430 southbridge.
This patch was tested by me on my old Asus A8N-VM CSM (where bios does not
support hpet and does not advertise it via acpi entry). My nForce430 version:
lspci -nn | grep LPC
00:0a.0 ISA bridge [0601]: nVidia Corporation MCP51 LPC Bridge [10de:0260]
(rev a2)

Kernel 2.6.24.3 after patching and using hpet=force reports this:
dmesg | grep -i hpet
Kernel command line: root=/dev/sda8 ro vga=773 video=vesafb:mtrr:4,ywrap
vt.default_utf8=0 hpet=force
Force enabled HPET at base address 0xfed00000
hpet clockevent registered
Time: hpet clocksource has been installed.

grep -i hpet /proc/timer_list
Clock Event Device: hpet
 set_next_event: hpet_legacy_next_event
 set_mode:       hpet_legacy_set_mode

grep Clock /proc/timer_list (before patching)
Clock Event Device: pit
Clock Event Device: lapic

grep Clock /proc/timer_list (after patching)
Clock Event Device: hpet
Clock Event Device: lapic

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-21 17:06:15 +01:00
Yinghai Lu
f62f1fc9ef x86: reserve dma32 early for gart
a system with 256 GB of RAM, when NUMA is disabled crashes the
following way:

Your BIOS doesn't leave a aperture memory hole
Please enable the IOMMU option in the BIOS setup
This costs you 64 MB of RAM
Cannot allocate aperture memory hole (ffff8101c0000000,65536K)
Kernel panic - not syncing: Not enough memory for aperture
Pid: 0, comm: swapper Not tainted 2.6.25-rc4-x86-latest.git #33

Call Trace:
 [<ffffffff84037c62>] panic+0xb2/0x190
 [<ffffffff840381fc>] ? release_console_sem+0x7c/0x250
 [<ffffffff847b1628>] ? __alloc_bootmem_nopanic+0x48/0x90
 [<ffffffff847b0ac9>] ? free_bootmem+0x29/0x50
 [<ffffffff847ac1f7>] gart_iommu_hole_init+0x5e7/0x680
 [<ffffffff847b255b>] ? alloc_large_system_hash+0x16b/0x310
 [<ffffffff84506a2f>] ? _etext+0x0/0x1
 [<ffffffff847a2e8c>] pci_iommu_alloc+0x1c/0x40
 [<ffffffff847ac795>] mem_init+0x45/0x1a0
 [<ffffffff8479ff35>] start_kernel+0x295/0x380
 [<ffffffff8479f1c2>] _sinittext+0x1c2/0x230

the root cause is : memmap PMD is too big,
[ffffe200e0600000-ffffe200e07fffff] PMD ->ffff81383c000000 on node 0
almost near 4G..., and vmemmap_alloc_block will use up the ram under 4G.

solution will be:
1. make memmap allocation get memory above 4G...
2. reserve some dma32 range early before we try to set up memmap for all.
and release that before pci_iommu_alloc, so gart or swiotlb could get some
range under 4g limit for sure.

the patch is using method 2.
because method1 may need more code to handle SPARSEMEM and SPASEMEM_VMEMMAP

will get
Your BIOS doesn't leave a aperture memory hole
Please enable the IOMMU option in the BIOS setup
This costs you 64 MB of RAM
Mapping aperture over 65536 KB of RAM @ 4000000
Memory: 264245736k/268959744k available (8484k kernel code, 4187464k reserved, 4004k data, 724k init)

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-21 17:06:15 +01:00
Coleman Kane
fc115bf19b x86: add the DFF (Desktop Form Factor) Dell Optiplex 745 to the reboot errata list
We recently got some of the "Desktop Form Factor" Optiplex 745's in.  I
noticed that there's an entry for the SFF one's, but the BIOS model number
of the DFF differs from that of the SFF.  We have been reliably
experiencing the same (as far as I can tell) reboot bug as the SFF boxes.

Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-21 17:06:15 +01:00
Randy Dunlap
3178071560 x86/visws: fix printk format warnings
Fix visws printk format warnings:

/local/linsrc/linux-2.6.24-git15/arch/x86/mach-visws/traps.c:50: warning: format '%#lx' expects type 'long unsigned int', but argument 2 has type 'u32'
/local/linsrc/linux-2.6.24-git15/arch/x86/mach-visws/traps.c:50: warning: format '%#lx' expects type 'long unsigned int', but argument 3 has type 'u32'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-21 17:06:15 +01:00
Yinghai Lu
7d2de13762 x86: tight online check in setup_per_cpu_areas
when numa disabled I got this compile warning:

arch/x86/kernel/setup64.c: In function setup_per_cpu_areas:
arch/x86/kernel/setup64.c:147: warning: the address of
                      contig_page_data will always evaluate as true

it seems we missed checking if the node is online before we try to refer
NODE_DATA. Fix it.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-21 17:06:15 +01:00
Yinghai Lu
6721fc0a0d x86: fix dma_alloc_pages
memory-less node support:

this patch uses updated dev_to_node, because dev_to_node already makes sure
it returns an online node.

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-21 17:06:14 +01:00
Randy Dunlap
53471121a8 documentation: Move power-related files to Documentation/power/
Move 00-INDEX entries to power/00-INDEX (and add entry for
pm_qos_interface.txt).

Update references to moved filenames.

Fix some trailing whitespace.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-03-12 18:10:51 -04:00
Thomas Gleixner
985a34bd75 x86: remove quicklists
quicklists cause a serious memory leak on 32-bit x86,
as documented at:

  http://bugzilla.kernel.org/show_bug.cgi?id=9991

the reason is that the quicklist pool is a special-purpose
cache that grows out of proportion. It is not accounted for
anywhere and users have no way to even realize that it's
the quicklists that are causing RAM usage spikes. It was
supposed to be a relatively small pool, but as demonstrated
by KOSAKI Motohiro, they can grow as large as:

  Quicklists:    1194304 kB

given how much trouble this code has caused historically,
and given that Andrew objected to its introduction on x86
(years ago), the best option at this point is to remove them.

[ any performance benefits of caching constructed pgds should
  be implemented in a more generic way (possibly within the page
  allocator), while still allowing constructed pages to be
  allocated by other workloads. ]

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-11 17:11:55 +01:00
Roland McGrath
40f0933d51 x86: ia32 syscall restart fix
The code to restart syscalls after signals depends on checking for a
negative orig_ax, and for particular negative -ERESTART* values in ax.
These fields are 64 bits and for a 32-bit task they get zero-extended.
The syscall restart behavior is lost, a regression from a native 32-bit
kernel and from 64-bit tasks' behavior.

This patch fixes the problem by doing sign-extension where it matters.

For orig_ax, the only time the value should be -1 but winds up as
0x0ffffffff is via a 32-bit ptrace call. So the patch changes ptrace to
sign-extend the 32-bit orig_eax value when it's stored; it doesn't
change the checks on orig_ax, though it uses the new current_syscall()
inline to better document the subtle importance of the used of
signedness there.

The ax value is stored a lot of ways and it seems hard to get them all
sign-extended at their origins. So for that, we use the
current_syscall_ret() to sign-extend it only for 32-bit tasks at the
time of the -ERESTART* comparisons.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-11 17:11:54 +01:00
Ingo Molnar
9a46d7e5b6 x86: ioremap, remove WARN_ON()
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-11 17:11:54 +01:00
Ingo Molnar
f5dbb55b99 fix BIOS PCI config cycle buglet causing ACPI boot regression
I figured out another ACPI related regression today.

randconfig testing triggered an early boot-time hang on a laptop of mine
(32-bit x86, config attached) - the screen was scrolling ACPI AML
exceptions [with no serial port and no early debugging available].

v2.6.24 works fine on that laptop with the same .config, so after a few
hours of bisection (had to restart it 3 times - other regressions
interacted), it honed in on this commit:

| 10270d4838 is first bad commit
|
| Author: Linus Torvalds <torvalds@woody.linux-foundation.org>
| Date:   Wed Feb 13 09:56:14 2008 -0800
|
|     acpi: fix acpi_os_read_pci_configuration() misuse of raw_pci_read()

reverting this commit ontop of -rc5 gave a correctly booting kernel.

But this commit fixes a real bug so the real question is, why did it
break the bootup?

After quite some head-scratching, the following change stood out:

-                               pci_id->bus = tu8;
+                               pci_id->bus = val;

pci_id->bus is defined as u16:

   struct acpi_pci_id {
           u16 segment;
           u16 bus;
   ...

and 'tu8' changed from u8 to u32. So previously we'd unconditionally
mask the return value of acpi_os_read_pci_configuration()
(raw_pci_read()) to 8 bits, but now we just trust whatever comes back
from the PCI access routines and only crop it to 16 bits.

But if the high 8 bits of that result contains any noise then we'll
write that into ACPI's PCI ID descriptor and confuse the heck out of the
rest of ACPI.

So lets check the PCI-BIOS code on that theory. We have this codepath
for 8-bit accesses (arch/x86/pci/pcbios.c:pci_bios_read()):

        switch (len) {
        case 1:
                __asm__("lcall *(%%esi); cld\n\t"
                        "jc 1f\n\t"
                        "xor %%ah, %%ah\n"
                        "1:"
                        : "=c" (*value),
                          "=a" (result)
                        : "1" (PCIBIOS_READ_CONFIG_BYTE),
                          "b" (bx),
                          "D" ((long)reg),
                          "S" (&pci_indirect));

Aha! The "=a" output constraint puts the full 32 bits of EAX into
*value. But if the BIOS's routines set any of the high bits to nonzero,
we'll return a value with more set in it than intended.

The other, more common PCI access methods (v1 and v2 PCI reads) clear
out the high bits already, for example pci_conf1_read() does:

        switch (len) {
        case 1:
                *value = inb(0xCFC + (reg & 3));

which explicitly converts the return byte up to 32 bits and zero-extends
it.

So zero-extending the result in the PCI-BIOS read routine fixes the
regression on my laptop. ( It might fix some other long-standing issues
we had with PCI-BIOS during the past decade ... ) Both 8-bit and 16-bit
accesses were buggy.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-10 18:09:05 -07:00
Rusty Russell
4357bd9453 lguest: Revert 1ce70c4fac, fix real problem.
Ahmed managed to crash the Host in release_pgd(), which cannot be a Guest
bug, and indeed it wasn't.

The bug was that handing a 0 as the address of the toplevel page table
being manipulated can cause the lookup code in find_pgdir() to return
an uninitialized cache entry (we shadow up to 4 top level page tables
for each Guest).

Commit 37cc8d7f96 introduced this
behaviour in the Guest, uncovering the bug.

The patch which he submitted (which removed the /4 from the index
calculation) simply ensured that these high-indexed entries hit the
early exit path of guest_set_pmd().  But you get lots of segfaults in
guest userspace as the PMDs aren't being updated.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2008-03-11 09:35:58 +11:00
Rusty Russell
3fabc55f34 lguest: Sanitize the lguest clock.
Now the TSC code handles a zero return from calculate_cpu_khz(),
lguest can simply pass through the value it gets from the Host: if
non-zero, all the normal TSC code applies.

Otherwise (or if the Host really doesn't support TSC), the clocksource
code will fall back to the slower but reasonable lguest clock.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2008-03-11 09:35:57 +11:00
Roland McGrath
84c6f6046c x86_64: make ptrace always sign-extend orig_ax to 64 bits
This makes 64-bit ptrace calls setting the 64-bit orig_ax field for a
32-bit task sign-extend the low 32 bits up to 64.  This matches what a
64-bit debugger expects when tracing a 32-bit task.

This follows on my "x86_64 ia32 syscall restart fix".  This didn't
matter until that was fixed.

The debugger ignores or zeros the high half of every register slot it
sets (including the orig_rax pseudo-register) uniformly.  It expects
that the setting of the low 32 bits always has the same meaning as a
32-bit debugger setting those same 32 bits with native 32-bit
facilities.

This never arose before because the syscall restart check never
matched any -ERESTART* values due to lack of sign extension.  Before
that fix, even 32-bit ptrace setting orig_eax to -1 failed to trigger
the restart check anyway.  So this was never noticed as a regression
of 64-bit debuggers vs 32-bit debuggers on the same 64-bit kernel.

Signed-off-by: Roland McGrath <roland@redhat.com>
[ Changed to just do the sign-extension unconditionally on x86-64,
  since orig_ax is always just a small integer and doesn't need
  the full 64-bit range ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-07 19:05:58 -08:00
Peter Korsgaard
1722770f13 x86-boot: don't request VBE2 information
The new x86 setup code (4fd06960f1) broke booting on an old P3/500MHz
with an onboard Voodoo3 of mine. After debugging it, it turned out
to be caused by the fact that the vesa probing now asks for VBE2 data.

Disassembing the video BIOS shows that it overflows the vesa_general_info
structure when VBE2 data is requested because the source addresses for the
information strings which get strcpy'ed to the buffer lie outside the 32K
BIOS code (and hence contain long sequences of 0xff's).

E.G.:

get_vbe_controller_info:
00002A9C  60                pushaw
00002A9D  1E                push ds
00002A9E  0E                push cs
00002A9F  1F                pop ds
00002AA0  2BC9              sub cx,cx
00002AA2  6626813D56424532  cmp dword [es:di],0x32454256 ; "VBE2"
00002AAA  7501              jnz .1
00002AAC  41                inc cx
.1:
00002AAD  51                push cx
00002AAE  B91400            mov cx,0x14
00002AB1  BED47F            mov si, controller_header
00002AB4  57                push di
00002AB5  F3A4              rep movsb ; copy vbe1.2 header

00002AB7  B9EC00            mov cx,0xec
00002ABA  2AC0              sub al,al
00002ABC  F3AA              rep stosb ; zero pad remainder

00002ABE  5F                pop di
00002ABF  E8EB0D            call word get_memory
00002AC2  C1E002            shl ax,0x2
00002AC5  26894512          mov [es:di+0x12],ax ; total memory
00002AC9  26C745040003      mov word [es:di+0x4],0x300 ; VBE version
00002ACF  268C4D08          mov [es:di+0x8],cs
00002AD3  268C4D10          mov [es:di+0x10],cs
00002AD7  59                pop cx
00002AD8  E361              jcxz .done ; VBE2 requested?
00002ADA  8D9D0001          lea bx,[di+0x100]
00002ADE  53                push bx
00002ADF  87DF              xchg bx,di ; di now points to 2nd half
00002AE1  26C747140001      mov word [es:bx+0x14],0x100 ; sw rev

00002AE7  26897F06          mov [es:bx+0x6],di		; oem string
00002AEB  268C4708          mov [es:bx+0x8],es
00002AEF  BE5280            mov si,0x8052 ; oem string
00002AF2  E87A1B            call word strcpy

00002AF5  26897F0E          mov [es:bx+0xe],di ; video mode list
00002AF9  268C4710          mov [es:bx+0x10],es
00002AFD  B91E00            mov cx,0x1e
00002B00  BEE87F            mov si,vidmodes
00002B03  F3A5              rep movsw

00002B05  26897F16          mov [es:bx+0x16],di ; oem vendor
00002B09  268C4718          mov [es:bx+0x18],es
00002B0D  BE2480            mov si,0x8024 ; oem vendor
00002B10  E85C1B            call word strcpy

00002B13  26897F1A          mov [es:bx+0x1a],di ; oem product
00002B17  268C471C          mov [es:bx+0x1c],es
00002B1B  BE3880            mov si,0x8038 ; oem product
00002B1E  E84E1B            call word strcpy

00002B21  26897F1E          mov [es:bx+0x1e],di ; oem product rev
00002B25  268C4720          mov [es:bx+0x20],es
00002B29  BE4580            mov si,0x8045 ; oem product rev
00002B2C  E8401B            call word strcpy

00002B2F  58                pop ax
00002B30  B90001            mov cx,0x100
00002B33  2BCF              sub cx,di
00002B35  03C8              add cx,ax
00002B37  2AC0              sub al,al
00002B39  F3AA              rep stosb ; zero pad
.done:
00002B3B  1F                pop ds
00002B3C  61                popaw
00002B3D  B84F00            mov ax,0x4f
00002B40  C3                ret

(The full BIOS can be found at http://peter.korsgaard.com/vgabios.bin
if interested).

The old setup code didn't ask for VBE2 info, and the new code doesn't
actually do anything with the extra information, so the fix is to simply
not request it. Other BIOS'es might have the same problem.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-07 16:39:14 +01:00
Ingo Molnar
7432d149fd x86: re-add reboot fixups
Jan Beulich noticed that the reboot fixups went missing during
reboot.c unification.

(commit 4d022e35fd)

Geode and a few other rare boards with special reboot quirks are
affected.

Reported-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-07 16:39:14 +01:00
Jan Beulich
d032b31a3a x86: fix typo in step.c
TIF_DEBUGCTLMSR has no meaning in the actual MSR...

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-07 16:39:14 +01:00
Jan Beulich
609b5297bc x86: fix merge mistake in i387.c
convert_fxsr_to_user() in 2.6.24's i387_32.c did this, and
convert_to_fxsr() also does the inverse, so I assume it's an oversight
that it is no longer being done.

[ mingo@elte.hu:

  we encode it this way because there's no space for the 'FPU Last
  Instruction Opcode' (->fop) field in the legacy user_i387_ia32_struct
  that PTRACE_GETFPREGS/PTRACE_SETFPREGS uses.

  it's probably pure legacy - i'd be surprised if any user-space relied on
  the FPU Last Opcode in any way. But indeed we used to do it previously
  so the most conservative thing is to preserve that piece of information.
]

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-07 16:39:14 +01:00
Aurelien Jarno
e40cd10ccf x86: clear DF before calling signal handler
The Linux kernel currently does not clear the direction flag before
calling a signal handler, whereas the x86/x86-64 ABI requires that.

Linux had this behavior/bug forever, but this becomes a real problem
with gcc version 4.3, which assumes that the direction flag is
correctly cleared at the entry of a function.

This patches changes the setup_frame() functions to clear the
direction before entering the signal handler.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: H. Peter Anvin <hpa@zytor.com>
2008-03-07 16:39:14 +01:00
Dave Jones
0e5aa8d621 [CPUFREQ] Remove debugging message from e_powersaver
We don't need to printk a message every time we transition.
Leave the code there, but ifdef'd out, as it's useful when
adding support for new processors.

Reported-by: Petr Titěra <P.Titera@century.cz>
Signed-off-by: Dave Jones <davej@redhat.com>
2008-03-05 14:45:31 -05:00
Ananth N Mavinakayanahalli
9edddaa200 Kprobes: indicate kretprobe support in Kconfig
Add CONFIG_HAVE_KRETPROBES to the arch/<arch>/Kconfig file for relevant
architectures with kprobes support.  This facilitates easy handling of
in-kernel modules (like samples/kprobes/kretprobe_example.c) that depend on
kretprobes being present in the kernel.

Thanks to Sam Ravnborg for helping make the patch more lean.

Per Mathieu's suggestion, added CONFIG_KRETPROBES and fixed up dependencies.

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-04 16:35:11 -08:00
Hugh Dickins
fcab59a318 x86: a P4 is a P6 not an i486
P4 has been coming out as CPU_FAMILY=4 instead of 6: fix MPENTIUM4 typo.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-04 11:55:34 -08:00
Linus Torvalds
34f10fc988 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86:
  x86/xen: fix DomU boot problem
  x86: not set node to cpu_to_node if the node is not online
  x86, i387: fix ptrace leakage using init_fpu()
2008-03-04 09:22:32 -08:00
Linus Torvalds
67171a3f03 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm:
  x86: disable KVM for Voyager and friends
  KVM: VMX: Avoid rearranging switched guest msrs while they are loaded
  KVM: MMU: Fix race when instantiating a shadow pte
  KVM: Route irq 0 to vcpu 0 exclusively
  KVM: Avoid infinite-frequency local apic timer
  KVM: make MMU_DEBUG compile again
  KVM: move alloc_apic_access_page() outside of non-preemptable region
  KVM: SVM: fix Windows XP 64 bit installation crash
  KVM: remove the usage of the mmap_sem for the protection of the memory slots.
  KVM: emulate access to MSR_IA32_MCG_CTL
  KVM: Make the supported cpuid list a host property rather than a vm property
  KVM: Fix kvm_arch_vcpu_ioctl_set_sregs so that set_cr0 works properly
  KVM: SVM: set NM intercept when enabling CR0.TS in the guest
  KVM: SVM: Fix lazy FPU switching
2008-03-04 09:22:05 -08:00
Ian Campbell
87d034f313 x86/xen: fix DomU boot problem
Construct Xen guest e820 map with a hole between 640K-1M.

It's pure luck that Xen kernels have gotten away with it in the past.

The patch below seems like the right thing to do. It certainly boots in
a domU without the DMI problem (without any of the other related patches
such as Alexander's).

Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Tested-by: Mark McLoughlin <markmc@redhat.com>
Acked-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-04 17:10:12 +01:00
Yinghai Lu
7c9e92b6cd x86: not set node to cpu_to_node if the node is not online
resolve boot problem reported by Mel Gorman:

   http://lkml.org/lkml/2008/2/13/404

init_cpu_to_node will use cpu->apic (from MADT or mptable) and
apic->node(from SRAT or AMD config space with k8_bus_64.c) to have
cpu->node mapping, and later identify_cpu will overwrite them
again...(with nearby_node...)

this patch checks if the node is online, otherwise it will not
update cpu_node map. so keep cpu_node map to online node before
identify_cpu..., to prevent possible error.

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-04 17:10:12 +01:00
Suresh Siddha
18a8622101 x86, i387: fix ptrace leakage using init_fpu()
This bug got introduced by the recent i387 merge:

  commit 4421011120
  Author: Roland McGrath <roland@redhat.com>
  Date:   Wed Jan 30 13:31:50 2008 +0100

      x86: x86 i387 user_regset

Current usage of unlazy_fpu() in ptrace specific routines is wrong.
unlazy_fpu() will not init fpu if the task never used math. So the
ptrace calls can expose the parent tasks FPU data in some cases.

Replace it with the init_fpu() which will init the math state, if the
task never used math before.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
2008-03-04 17:10:12 +01:00
Randy Dunlap
1a4e3f89c6 x86: disable KVM for Voyager and friends
Most classic Pentiums don't have hardware virtualization extension,
and building kvm with Voyager, Visual Workstation, or NUMAQ
generates spurious failures.

Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
2008-03-04 17:42:55 +02:00
Avi Kivity
33f9c505ed KVM: VMX: Avoid rearranging switched guest msrs while they are loaded
KVM tries to run as much as possible with the guest msrs loaded instead of
host msrs, since switching msrs is very expensive.  It also tries to minimize
the number of msrs switched according to the guest mode; for example,
MSR_LSTAR is needed only by long mode guests.  This optimization is done by
setup_msrs().

However, we must not change which msrs are switched while we are running with
guest msr state:

 - switch to guest msr state
 - call setup_msrs(), removing some msrs from the list
 - switch to host msr state, leaving a few guest msrs loaded

An easy way to trigger this is to kexec an x86_64 linux guest.  Early during
setup, the guest will switch EFER to not include SCE.  KVM will stop saving
MSR_LSTAR, and on the next msr switch it will leave the guest LSTAR loaded.
The next host syscall will end up in a random location in the kernel.

Fix by reloading the host msrs before changing the msr list.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-04 15:19:50 +02:00
Avi Kivity
f7d9c7b7b9 KVM: MMU: Fix race when instantiating a shadow pte
For improved concurrency, the guest walk is performed concurrently with other
vcpus.  This means that we need to revalidate the guest ptes once we have
write-protected the guest page tables, at which point they can no longer be
modified.

The current code attempts to avoid this check if the shadow page table is not
new, on the assumption that if it has existed before, the guest could not have
modified the pte without the shadow lock.  However the assumption is incorrect,
as the racing vcpu could have modified the pte, then instantiated the shadow
page, before our vcpu regains control:

  vcpu0        vcpu1

  fault
  walk pte

               modify pte
               fault in same pagetable
               instantiate shadow page

  lookup shadow page
  conclude it is old
  instantiate spte based on stale guest pte

We could do something clever with generation counters, but a test run by
Marcelo suggests this is unnecessary and we can just do the revalidation
unconditionally.  The pte will be in the processor cache and the check can
be quite fast.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-04 15:19:49 +02:00
Avi Kivity
0b975a3c2d KVM: Avoid infinite-frequency local apic timer
If the local apic initial count is zero, don't start a an hrtimer with infinite
frequency, locking up the host.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-04 15:19:48 +02:00
Marcelo Tosatti
24993d5349 KVM: make MMU_DEBUG compile again
the cr3 variable is now inside the vcpu->arch structure.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-04 15:19:47 +02:00
Marcelo Tosatti
5e4a0b3c1b KVM: move alloc_apic_access_page() outside of non-preemptable region
alloc_apic_access_page() can sleep, while vmx_vcpu_setup is called
inside a non preemptable region. Move it after put_cpu().

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-04 15:19:46 +02:00
Joerg Roedel
a2938c8070 KVM: SVM: fix Windows XP 64 bit installation crash
While installing Windows XP 64 bit wants to access the DEBUGCTL and the last
branch record (LBR) MSRs. Don't allowing this in KVM causes the installation to
crash. This patch allow the access to these MSRs and fixes the issue.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Markus Rechberger <markus.rechberger@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-04 15:19:45 +02:00
Izik Eidus
72dc67a696 KVM: remove the usage of the mmap_sem for the protection of the memory slots.
This patch replaces the mmap_sem lock for the memory slots with a new
kvm private lock, it is needed beacuse untill now there were cases where
kvm accesses user memory while holding the mmap semaphore.

Signed-off-by: Izik Eidus <izike@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-04 15:19:40 +02:00
Rafael J. Wysocki
9b5cf48b06 x86: revert "x86: CPA: avoid split of alias mappings"
Revert:

  commit 8be8f54bae
  Author: Thomas Gleixner <tglx@linutronix.de>
  Date:   Sat Feb 23 20:43:21 2008 +0100

      x86: CPA: avoid split of alias mappings

because it clearly mishandles the case when __change_page_attr(), called
from __change_page_attr_set_clr(), changes cpa->processed to 1 and
cpa_process_alias(cpa) is executed right after that.

This crashes my x86-64 test box early in the boot process
(ref. http://bugzilla.kernel.org/show_bug.cgi?id=10140#c4).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-03 14:18:27 +01:00
Joerg Roedel
c7ac679c16 KVM: emulate access to MSR_IA32_MCG_CTL
Injecting an GP when accessing this MSR lets Windows crash when running some
stress test tools in KVM.  So this patch emulates access to this MSR.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Markus Rechberger <markus.rechberger@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-03 11:22:37 +02:00
Avi Kivity
674eea0fc4 KVM: Make the supported cpuid list a host property rather than a vm property
One of the use cases for the supported cpuid list is to create a "greatest
common denominator" of cpu capabilities in a server farm.  As such, it is
useful to be able to get the list without creating a virtual machine first.

Since the code does not depend on the vm in any way, all that is needed is
to move it to the device ioctl handler.  The capability identifier is also
changed so that binaries made against -rc1 will fail gracefully.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-03 11:22:25 +02:00
Paul Knowles
d730616384 KVM: Fix kvm_arch_vcpu_ioctl_set_sregs so that set_cr0 works properly
Whilst working on getting a VM to initialize in to IA32e mode I found
this issue. set_cr0 relies on comparing the old cr0 to the new one to
work correctly.  Move the assignment below so the compare can work.

Signed-off-by: Paul Knowles <paul@transitive.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-03 11:22:14 +02:00
Joerg Roedel
6b390b6392 KVM: SVM: set NM intercept when enabling CR0.TS in the guest
Explicitly enable the NM intercept in svm_set_cr0 if we enable TS in the guest
copy of CR0 for lazy FPU switching. This fixes guest SMP with Linux under SVM.
Without that patch Linux deadlocks or panics right after trying to boot the
other CPUs.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Markus Rechberger <markus.rechberger@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-03 11:20:21 +02:00
Joerg Roedel
334df50a86 KVM: SVM: Fix lazy FPU switching
If the guest writes to cr0 and leaves the TS flag at 0 while vcpu->fpu_active
is also 0, the TS flag in the guest's cr0 gets lost. This leads to corrupt FPU
state an causes Windows Vista 64bit to crash very soon after boot.  This patch
fixes this bug.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Markus Rechberger <markus.rechberger@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-03 11:18:18 +02:00
Jeremy Fitzhardinge
d40e705903 xen: mask out SEP from CPUID
Fix 32-on-64 pvops kernel:

we don't want userspace using syscall/sysenter, even if the hypervisor
supports it, so mask it out from CPUID.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-29 18:55:43 +01:00
Ingo Molnar
b4ef95de00 x86: disable BTS ptrace extensions for now
revert the BTS ptrace extension for now.

based on general objections from Roland McGrath:

    http://lkml.org/lkml/2008/2/21/323

we'll let the BTS functionality cook some more and re-enable
it in v2.6.26. We'll leave the dead code around to help the
development of this code.

(X86_BTS is not defined at the moment)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-29 18:55:42 +01:00
Thomas Gleixner
8be8f54bae x86: CPA: avoid split of alias mappings
avoid over-eager large page splitup.

When the target area needs to be split or is split already (ioremap)
then the current code enforces the split of large mappings in the alias
regions even if we could avoid it.

Use a separate variable processed in the cpa_data structure to carry
the number of pages which have been processed instead of reusing the
numpages variable. This keeps numpages intact and gives the alias code
a chance to keep large mappings intact.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-29 18:55:42 +01:00
Ingo Molnar
757265b8c5 x86: delay the export removal of init_mm
delay the removal of this symbol export by one more kernel release,
giving external modules such as VirtualBox a chance to stop using it.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-29 18:55:42 +01:00
Ingo Molnar
b16bf712f4 x86: fix leak un ioremap_page_range() failure
Jan Beulich noticed it during code review that if a driver's ioremap()
fails (say due to -ENOMEM) then we might leak the struct vm_area.

Free it properly.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-29 18:55:42 +01:00
Roland McGrath
f2dbe03dcc x86 vdso: fix build locale dependency
Priit Laes discovered that the sed command processing nm output was
sensitive to locale settings.  This was addressed in commit
03994f01e8 by using [:alnum:] in place of
[a-zA-Z0-9].

But that solution too is locale-dependent and may not always match
the identifiers it needs to.  The better fix is just to run sed et al
with a fixed locale setting in all builds.

Signed-off-by: Roland McGrath <roland@redhat.com>
CC: Priit Laes <plaes@plaes.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-29 18:55:39 +01:00
Thomas Gleixner
d67bbacb4b x86: restore vsyscall64 prochandler
a recent fix:

  commit ce28b9864b
  Author: Thomas Gleixner <tglx@linutronix.de>
  Date:   Wed Feb 20 23:57:30 2008 +0100

    x86: fix vsyscall wreckage

removed the broken /kernel/vsyscall64 handler completely.
This triggers the following debug check:

  sysctl table check failed: /kernel/vsyscall64  No proc_handler

Restore the sane part of the proc handler.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-29 18:55:39 +01:00
Roland McGrath
3d00daf446 x86: tls prevent_tail_call
Fix a kernel bug (vmware boot problem) reported by Tomasz Grobelny,
which occurs with certain .config variants and gccs.

The x86 TLS cleanup in commit efd1ca52d0
made the sys_set_thread_area and sys_get_thread_area functions ripe for
tail call optimization.  If the compiler chooses to use it for them, it
can clobber the user trap frame because these are asmlinkage functions.

Reported-by: Tomasz Grobelny <tomasz@grobelny.oswiecenia.net>
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-29 18:55:39 +01:00
Mikael Pettersson
12c247a671 x86: fix boot failure on 486 due to TSC breakage
> Diffing dmesg between git7 and git8 doesn't sched any light since
 > git8 also removed the printouts of the x86 caps as they were being
 > initialised and updated. I'm currently adding those printouts back
 > in the hope of seeing where and when the caps get broken.

That turned out to be very illuminating:

 --- dmesg-2.6.24-git7	2008-02-24 18:01:25.295851000 +0100
 +++ dmesg-2.6.24-git8	2008-02-24 18:01:25.530358000 +0100
 ...
 CPU: After generic identify, caps: 00000003 00000000 00000000 00000000 00000000 00000000 00000000 00000000

 CPU: After all inits, caps: 00000003 00000000 00000000 00000000 00000000 00000000 00000000 00000000
+CPU: After applying cleared_cpu_caps, caps: 00000013 00000000 00000000 00000000 00000000 00000000 00000000 00000000

Notice how the TSC cap bit goes from Off to On.

(The first two lines are printout loops from -git7 forward-ported
to -git8, the third line is the same printout loop added just after
the xor-with-cleared_cpu_caps[] loop.)

Here's how the breakage occurs:
1. arch/x86/kernel/tsc_32.c:tsc_init() sees !cpu_has_tsc,
   so bails and calls setup_clear_cpu_cap(X86_FEATURE_TSC).
2. include/asm-x86/cpufeature.h:setup_clear_cpu_cap(bit) clears
   the bit in boot_cpu_data and sets it in cleared_cpu_caps
3. arch/x86/kernel/cpu/common.c:identify_cpu() XORs all caps
   in with cleared_cpu_caps
   HOWEVER, at this point c->x86_capability correctly has TSC
   Off, cleared_cpu_caps has TSC On, so the XOR incorrectly
   sets TSC to On in c->x86_capability, with disastrous results.

The real bug is that clearing bits with XOR only works if the
bits are known to be 1 prior to the XOR, and that's not true here.

A simple fix is to convert the XOR to AND-NOT instead. The following
patch does that, and allows my 486 to boot 2.6.25-rc kernels again.

[ mingo@elte.hu: fixed a similar bug in setup_64.c as well. ]

The breakage was introduced via commit 7d851c8d3d.

Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-26 12:56:04 +01:00
Priit Laes
03994f01e8 x86: fix build on non-C locales.
For some locales regex range [a-zA-Z] does not work as it is supposed to.
so we have to use [:alnum:] and [:xdigit:] to make it work as intended.

[1] http://en.wikipedia.org/wiki/Estonian_alphabet

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-26 12:56:02 +01:00
Glauber Costa
2b775a27c0 x86: make c_idle.work have a static address.
Currently, c_idle is declared in the stack, and thus, have no static address.

Peter Zijlstra points out this simple solution, in which c_idle.work
is initializated separatedly. Note that the INIT_WORK macro has a static
declaration of a key inside.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Acked-by: Peter Zijlstra <pzijlstr@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-26 12:56:02 +01:00
Vegard Nossum
1650743cdc x86: don't save unreliable stack trace entries
Currently, there is no way for print_stack_trace() to determine whether
a given stack trace entry was deemed reliable or not, simply because
save_stack_trace() does not record this information. (Perhaps needless
to say, this makes the saved stack traces A LOT harder to read, and
probably with no other benefits, since debugging features that use
save_stack_trace() most likely also require frame pointers, etc.)

This patch reverts to the old behaviour of only recording the reliable trace
entries for saved stack traces.

Signed-off-by: Vegard Nossum <vegardno@ifi.uio.no>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-26 12:55:58 +01:00
Adrian Bunk
ed2b7e2b1d x86: don't make swapper_pg_pmd global
There doesn't seem to be any reason for swapper_pg_pmd being global.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-26 12:55:58 +01:00
Joerg Roedel
4147c8747e x86: don't print a warning when MTRR are blank and running in KVM
Inside a KVM virtual machine the MTRRs are usually blank. This confuses Linux
and causes a warning message at boot. This patch removes that warning message
when running Linux as a KVM guest.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-26 12:55:57 +01:00
Ingo Molnar
5d119b2c9a x86: fix execve with -fstack-protect
pointed out by pageexec@freemail.hu:

> what happens here is that gcc treats the argument area as owned by the
> callee, not the caller and is allowed to do certain tricks. for ssp it
> will make a copy of the struct passed by value into the local variable
> area and pass *its* address down, and it won't copy it back into the
> original instance stored in the argument area.
>
> so once sys_execve returns, the pt_regs passed by value hasn't at all
> changed and its default content will cause a nice double fault (FWIW,
> this part took me the longest to debug, being down with cold didn't
> help it either ;).

To fix this we pass in pt_regs by pointer.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-26 12:55:57 +01:00
Thomas Gleixner
ce28b9864b x86: fix vsyscall wreckage
based on a report from Arne Georg Gleditsch about user-space apps
misbehaving after toggling /proc/sys/kernel/vsyscall64, a review
of the code revealed that the "NOP patching" done there is
fundamentally unsafe for a number of reasons:

1) the patching code runs without synchronizing other CPUs

2) it inserts NOPs even if there is no clock source which provides vread

3) when the clock source changes to one without vread we run in
   exactly the same problem as in #2

4) if nobody toggles the proc entry from 1 to 0 and to 1 again, then
   the syscall is not patched out

as a result it is possible to break user-space via this patching.
The only safe thing for now is to remove the patching.

This code was broken since v2.6.21.

Reported-by: Arne Georg Gleditsch <arne.gleditsch@dolphinics.no>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-26 12:55:57 +01:00
Ingo Molnar
d4afe41418 x86: rename KERNEL_TEXT_SIZE => KERNEL_IMAGE_SIZE
The KERNEL_TEXT_SIZE constant was mis-named, as we not only map the kernel
text but data, bss and init sections as well.

That name led me on the wrong path with the KERNEL_TEXT_SIZE regression,
because i knew how big of _text_ my images have and i knew about the 40 MB
"text" limit so i wrongly thought to be on the safe side of the 40 MB limit
with my 29 MB of text, while the total image size was slightly above 40 MB.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-26 12:55:56 +01:00
Ingo Molnar
88f3aec7af x86: fix spontaneous reboot with allyesconfig bzImage
recently the 64-bit allyesconfig bzImage kernel started spontaneously
rebooting during early bootup.

after a few fun hours spent with early init debugging, it turns out
that we've got this rather annoying limit on the size of the kernel
image:

      #define KERNEL_TEXT_SIZE  (40*1024*1024)

which limit my vmlinux just happened to pass:

       text           data       bss        dec       hex   filename
   29703744        4222751   8646224   42572719   2899baf   vmlinux

40 MB is 42572719 bytes, so my vmlinux was just 1.5% above this limit :-/

So it happily crashed right in head_64.S, which - as we all know - is
the most debuggable code in the whole architecture ;-)

So increase the limit to allow an up to 128MB kernel image to be mapped.
(should anyone be that crazy or lazy)

We have a full 4K of pagetable (level2_kernel_pgt) allocated for these
mappings already, so there's no RAM overhead and the limit was rather
pointless and arbitrary.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-26 12:55:56 +01:00
Yinghai Lu
3b57bc461f x86: remove double-checking empty zero pages debug
so far no one complained about that.

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-26 12:55:55 +01:00
Pavel Machek
7265b6f10d x86: notsc is ignored on common configurations
notsc is ignored in 32-bit kernels if CONFIG_X86_TSC is on.. which is
bad, fix it.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-26 12:55:54 +01:00
Randy Dunlap
f5106d91f2 x86/mtrr: fix kernel-doc missing notation
Fix mtrr kernel-doc warning:
Warning(linux-2.6.24-git12//arch/x86/kernel/cpu/mtrr/main.c:677): No description found for parameter 'end_pfn'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-26 12:55:52 +01:00
H. Peter Anvin
829157be59 x86: handle BIOSes which terminate e820 with CF=1 and no SMAP
The proper way to terminate the e820 chain is with %ebx == 0 on the
last legitimate memory block.  However, several BIOSes don't do that
and instead return error (CF = 1) when trying to read off the end of
the list.  For this error return, %eax doesn't necessarily return the
SMAP signature -- correctly so, since %ah should contain an error code
in this case.

To deal with some particularly broken BIOSes, we clear the entire e820
chain if the SMAP signature is missing in the middle, indicating a
plain insane e820 implementation.  However, we need to make the test
for CF = 1 before the SMAP check.

This fixes at least one HP laptop (nc6400) for which none of the
memory-probing methods (e820, e801, 88) functioned fully according to
spec.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-26 12:55:52 +01:00
H. Peter Anvin
959b3be64c x86: don't use P6_NOPs if compiling with CONFIG_X86_GENERIC
P6_NOPs are definitely not supported on some VIA CPUs, and possibly
(unverified) on AMD K7s.  It is also the only thing that prevents a
686 kernel from running on Transmeta TM3x00/5x00 (Crusoe) series.

The performance benefit over generic NOPs is very small, so when
building for generic consumption, avoid using them.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-26 12:55:51 +01:00
H. Peter Anvin
7343b3b3a6 x86: require family >= 6 if we are using P6 NOPs
The P6 family of NOPs are only available on family >= 6 or above, so
enforce that in the boot code.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-26 12:55:51 +01:00
H. Peter Anvin
a7ef94e688 x86: do not promote TM3x00/TM5x00 to i686-class
We have been promoting Transmeta TM3x00/TM5x00 chips to i686-class
based on the notion that they contain all the user-space visible
features of an i686-class chip.  However, this is not actually true:
they lack the EA-taking long NOPs (0F 1F /0).  Since this is a
userspace-visible incompatibility, downgrade these CPUs to the
manufacturer-defined i586 level.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-26 12:55:50 +01:00
Pavel Machek
b02a7f22f3 x86: hpet fix docbook comment
Signed-off-by: Pavel Machek <Pavel@suse.cz>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-26 12:55:50 +01:00
Ingo Molnar
92cb54a37a x86: make DEBUG_PAGEALLOC and CPA more robust
Use PF_MEMALLOC to prevent recursive calls in the DBEUG_PAGEALLOC
case. This makes the code simpler and more robust against allocation
failures.

This fixes the following fallback to non-mmconfig:

   http://lkml.org/lkml/2008/2/20/551
   http://bugzilla.kernel.org/show_bug.cgi?id=10083

Also, for DEBUG_PAGEALLOC=n reduce the pool size to one page.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-26 12:55:50 +01:00
Ahmed S. Darwish
1ce70c4fac x86/lguest: fix pgdir pmd index calculation
Hi all,

Beginning from commits close to v2.6.25-rc2, running lguest always oopses
the host kernel. Oops is at [1].

Bisection led to the following commit:

commit 37cc8d7f96

    x86/early_ioremap: don't assume we're using swapper_pg_dir

    At the early stages of boot, before the kernel pagetable has been
    fully initialized, a Xen kernel will still be running off the
    Xen-provided pagetables rather than swapper_pg_dir[].  Therefore,
    readback cr3 to determine the base of the pagetable rather than
    assuming swapper_pg_dir[].

 static inline pmd_t * __init early_ioremap_pmd(unsigned long addr)
 {
-	pgd_t *pgd = &swapper_pg_dir[pgd_index(addr)];
+	/* Don't assume we're using swapper_pg_dir at this point */
+	pgd_t *base = __va(read_cr3());
+	pgd_t *pgd = &base[pgd_index(addr)];
 	pud_t *pud = pud_offset(pgd, addr);
 	pmd_t *pmd = pmd_offset(pud, addr);

Trying to analyze the problem, it seems on the guest side of lguest,
%cr3 has a different value from &swapper_pg-dir (which
is AFAIK fine on a pravirt guest):

Putting some debugging messages in early_ioremap_pmd:

/* Appears 3 times */
[    0.000000] ***************************
[    0.000000] __va(%cr3) = c0000000, &swapper_pg_dir = c02cc000
[    0.000000] ***************************

After 8 hours of debugging and staring on lguest code, I noticed something
strange in paravirt_ops->set_pmd hypercall invocation:

static void lguest_set_pmd(pmd_t *pmdp, pmd_t pmdval)
{
	*pmdp = pmdval;
	lazy_hcall(LHCALL_SET_PMD, __pa(pmdp)&PAGE_MASK,
		   (__pa(pmdp)&(PAGE_SIZE-1))/4, 0);
}

The first hcall parameter is global pgdir which looks fine. The second
parameter is the pmd index in the pgdir which is suspectful.

AFAIK, calculating the index of pmd does not need a divisoin over four.
Removing the division made lguest work fine again . Patch is at [2].

I am not sure why the division over four existed in the first place. It
seems bogus, maybe the Xen patch just made the problem appear ?

[2]: The patch:

[PATCH] lguest: fix pgdir pmd index cacluation

Remove an error in index calculation which leads to removing
a not existing shadow page table (leading to a Null dereference).

Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-26 12:55:49 +01:00
Tony Breeds
db342d216b lguest: fix build breakage
[ mingo@elte.hu: merged to Rusty's patch ]

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-26 12:55:49 +01:00
Harvey Harrison
cbc3497370 lguest: include function prototypes
Added a declaration to asm-x86/lguest.h and moved the extern arrays there
as well.  As an alternative to including asm/lguest.h directly, an
include could be put in linux/lguest.h

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: "rusty@rustcorp.com.au" <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-26 12:55:49 +01:00
Linus Torvalds
2c020a99e0 Mark CC_STACKPROTECTOR as being BROKEN
It's always been broken, but recent fixes actually made it do something,
and now the brokenness shows up as the resulting kernel simply not
working at all.

So it used to be that you could enable this config option, and it just
didn't do anything.  Now we'd better stop people from enabling it by
mistake, since it _does_ do something, but does it so badly as to be
unusable.

Code to actually make it work is pending, but incomplete and won't be
merged into 2.6.25 in any case.

Acked-by: Arjan van de Ven <arjan@infradead.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Cc: James Morris <jmorris@namei.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-22 08:21:38 -08:00
Roland McGrath
f9cb02b0be x86 ptrace: fix compat PTRACE_SETREGS
Simple typo fix for regression introduced by the user_regset changes.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-22 07:35:06 -08:00
Linus Torvalds
20f8d2a493 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (26 commits)
  PM: Make suspend_device() static
  PCI ACPI: Fix comment describing acpi_pci_choose_state
  Hibernation: Handle DEBUG_PAGEALLOC on x86
  ACPI: fix build warning
  ACPI: TSC breaks atkbd suspend
  ACPI: remove is_processor_present prototype
  acer-wmi: Add DMI match for mail LED on Acer TravelMate 4200 series
  ACPI: sparse fix, replace macro with static function
  ACPI: thinkpad-acpi: add tablet-mode reporting
  ACPI: thinkpad-acpi: minor hotkey_radio_sw fixes
  ACPI: thinkpad-acpi: improve thinkpad-acpi input device documentation
  ACPI: thinkpad-acpi: issue input events for tablet swivel events
  ACPI: thinkpad-acpi: make the video output feature optional
  ACPI: thinkpad-acpi: synchronize input device switches
  ACPI: thinkpad-acpi: always track input device open/close
  ACPI: thinkpad-acpi: trivial fix to documentation
  ACPI: thinkpad-acpi: trivial fix to module_desc typo
  intel_menlo: extract return values using PTR_ERR
  ACPI video: check for error from thermal_cooling_device_register
  ACPI thermal: extract return values using PTR_ERR
  ...
2008-02-21 16:33:19 -08:00
Yinghai Lu
6e4be1ff2e PCI: don't load acpi_php when acpi is disabled
When acpi=off and pci=nomsi, don't load acpiphp.

Fixes this:

pci_hotplug: PCI Hot Plug PCI Core version: 0.5
acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
ACPI Exception (utmutex-0263): AE_BAD_PARAMETER, Thread
FFFF81103CC54000 could not acquire Mutex [1] [20070126]

[akpm@linux-foundation.org: export acpi_pci_disabled for acpiphp.ko]
[akpm@linux-foundation.org: fix return statement]
Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Cc: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-21 15:34:37 -08:00
Jason Gaston
cc09c5bcf1 PCI: irq: patch for Intel ICH10 DeviceID's
This patch adds the Intel ICH10 LPC Controller DeviceID's.

Signed-off-by: Jason Gaston <jason.d.gaston@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-21 15:34:36 -08:00
Rafael J. Wysocki
8a235efad5 Hibernation: Handle DEBUG_PAGEALLOC on x86
Make hibernation work with CONFIG_DEBUG_PAGEALLOC set on x86, by
checking if the pages to be copied are marked as present in the
kernel mapping and temporarily marking them as present if that's not
the case.  No functional modifications are introduced if
CONFIG_DEBUG_PAGEALLOC is unset.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-21 02:15:28 -05:00
Linus Torvalds
5d9c4a7de6 Merge branch 'agp-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/agp-2.6
* 'agp-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/agp-2.6:
  agp: fix missing casts that produced a warning.
  agp: add support for 662/671 to agp driver
  fix historic ioremap() abuse in AGP
  agp/sis: Suspend support for SiS AGP
  agp/sis: Clear bit 2 from aperture size byte as well
2008-02-19 18:29:57 -08:00
Arjan van de Ven
156fbc3fbe x86: fix page_is_ram() thinko
page_is_ram() has a special case for the 640k-1M bios area, however
due to a thinko the special case checks the e820 table entry and
not the memory the user has asked for. This patch fixes the bug.

[ mingo@elte.hu: this too is better solved in the e820 space, but those
  fixes are too intrusive for v2.6.25. ]

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:34 +01:00
Arjan van de Ven
d8a9e6a51e x86: fix WARN_ON() message: teach page_is_ram() about the special 4Kb bios data page
This patch teaches page_is_ram() about the fact that the first
4Kb of memory are special on x86, even though the E820 table
normally doesn't exclude it.

This fixes the WARN_ON() reported by Laurent Riffard who was also
very helpful in diagnosing the issue.

[ mingo@elte.hu: we are working on doing this properly in the e820
  space, but for 2.6.25 this is the better fix. ]

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:34 +01:00
Ahmed S. Darwish
7c6357da11 x86: i8259A: remove redundant irq_descinitialization
Remove redundant irq_desc[NR_IRQS] element initialization in
init_ISA_irqs(). irq_desc[NR_IRQS] is already statically
initialized with the same values in kernel/irq/handle.c .

besides the clean-up value this also saves some space:

      text    data     bss     dec     hex filename
      1389     356      14    1759     6df i8259_32.o.before
      1325     356      14    1695     69f i8259_32.o.after

Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:34 +01:00
Sam Ravnborg
3f85d63ea4 x86: fix vdso_install breaks user "make install"
I suggest to make the vdso_install step independent as
in following patch.

This solves the issue at ahnd and still gives us the posibility
to install the files should they be needed.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:34 +01:00
Ingo Molnar
fd59e9e9c8 x86: change IO delay back to 0x80
change back the IO delay to 0x80.

Alan says that 0xed is known to break some older boxes, and given that
the get-rid-of-outb-APIs efforts are well underway we should just let
them be finished.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:34 +01:00
Cyrill Gorcunov
85c42d0dbb x86: lds - Use THREAD_SIZE instead of numeric constant
Though we use PDA for regular task stack but that
is not acceptable for init_task wich is special
one. We still have to allocate init_task's stack
in that manner.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:34 +01:00
Cyrill Gorcunov
3cdac41f20 x86: lds - Use PAGE_SIZE instead of numeric constant
It's much better to use PAGE_SIZE then magic 4096
(though it's almost synonym in most cases on x86 but
not for *all* cases ;)

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:33 +01:00
Cyrill Gorcunov
bbb1e57a1c x86 cleanup: suspend_asm_64.S - use X86_CR4_PGE instead of numeric value
By including <asm/processor-flags.h> we're allowed to use
X86_CR4_PGE instead of numeric constant.

md5 sums of compiled files are differ due to this inclusion
but .text section remains the same.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:33 +01:00
Marcin Slusarz
d8ff0bbf56 x86: fix printout ugliness in cpu info printk
fix print_cpu_info, because it produced on boot:

  CPU: <6>AMD Athlon(tm) 64 Processor 3200+ stepping 00

instead of:

  CPU: AMD Athlon(tm) 64 Processor 3200+ stepping 00

(broken since 04e1ba8521 -
 x86: cleanup kernel/setup_64.c)

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:33 +01:00
Ingo Molnar
d76c1ae4d1 x86: clean up csum-wrappers_64.c some more
no code changed:

arch/x86/lib/csum-wrappers_64.o:
   text    data     bss     dec     hex filename
    839       0       0     839     347 csum-wrappers_64.o.before
    839       0       0     839     347 csum-wrappers_64.o.after
md5:
b31994226c33e0b52bef5a0e110b84b0  csum-wrappers_64.o.before.asm
b31994226c33e0b52bef5a0e110b84b0  csum-wrappers_64.o.after.asm

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:32 +01:00
Paolo Ciarrocchi
0df025b709 x86: coding style fixes in arch/x86/lib/csum-wrappers_64.c
no code changed:

arch/x86/lib/csum-wrappers_64.o:
   text    data     bss     dec     hex filename
    839       0       0     839     347 csum-wrappers_64.o.before
    839       0       0     839     347 csum-wrappers_64.o.after
md5:
b31994226c33e0b52bef5a0e110b84b0  csum-wrappers_64.o.before.asm
b31994226c33e0b52bef5a0e110b84b0  csum-wrappers_64.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:32 +01:00
Paolo Ciarrocchi
4b44f81016 x86: coding style fixes in arch/x86/lib/io_64.c
This simple patch makes the file error free (according to
checkpatch.pl)

no code changed:

arch/x86/lib/io_64.o:
   text    data     bss     dec     hex filename
    308       0       0     308     134 io_64.o.before
    308       0       0     308     134 io_64.o.after
md5:
3c64f9ed83d091678e849b36ca27bee3  io_64.o.before.asm
3c64f9ed83d091678e849b36ca27bee3  io_64.o.after.asm

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:32 +01:00
Ingo Molnar
e43eb7bab6 x86: exclude vsyscall files from stackprotect
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:32 +01:00
Sam Ravnborg
6871b76fb5 x86: annotate pci/common.s:pci_scan_bus_with_sysdata with __devinit
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:32 +01:00
Sam Ravnborg
da5968ae30 x86: fix section mismatch in head_64.S:initial_code
initial_code are initially used to hold a function pointer
from __init and later from __cpuinit. This confuses modpost
and changing initial_code to REFDATA silence the warning.
(But now we do not discard the variable anymore).

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:31 +01:00
Sam Ravnborg
d01b9ad56e x86: fix section mismatch in srat_64.c:reserve_hotadd
reserve_hotadd() are only used by __init acpi_numa_memory_affinity_init().
Annotate reserve_hotadd() with __init is the trivial fix.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:31 +01:00
Sam Ravnborg
177c7715cd x86: fix section mismatch warning in topology.c:arch_register_cpu
arch_register_cpu() is only defined for HOTPLUG_CPU code
so simple fix is to ignore references by annotating the
function __ref.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:30 +01:00
Sam Ravnborg
04d733bd35 x86: fix section mismatch in setup_64.c:srat_detect_node
srat_detect_node() is only used by __cpuinit init_intel().
So the trivial fix is to annotate srat_detect_node() with __cpuinit.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:30 +01:00
Sam Ravnborg
08acb67262 x86: fix section mismatch warning in setup_64.c:nearby_node
nearby_node() were only used by __cpuinit amd_detect_cmp()
So annotating nearby_node() __cpuinit was the trivial fix.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:29 +01:00
Li Zefan
a062bae9c4 x86: fix compile warning building without CONFIG_SYSCTL
arch/x86/kernel/nmi_64.c:50: warning: 'unknown_nmi_panic_callback' declared 'static' but never defined

This patch also fixes nmi_32.c

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:29 +01:00
Andi Kleen
8e31c2ac11 x86: CPA: remove BUG_ON for LRU/Compound pages
New implementation does not use lru for anything so there is no need
to reject pages that are in the LRU. Similar for compound pages (which
were checked because they also use page->lru)

[ tglx@linutronix.de: removed unused variable ]

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:29 +01:00
Adrian Bunk
aa65af3f92 x86: don't make swapper_pg_fixmap global
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Ian Campbell <ijc@hellion.org.uk>
Cc: hpa@zytor.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:29 +01:00
Adrian Bunk
f7f3d791e6 x86: don't make irq_return global
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: hpa@zytor.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:29 +01:00
Adrian Bunk
d3cfeb4fbe x86: unexport io_delay_type
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: hpa@zytor.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:29 +01:00
Adrian Bunk
148a142495 x86: make mxcsr_feature_mask static again
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: hpa@zytor.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:28 +01:00
Harvey Harrison
ecaea42eb8 x86: sparse warning in efi.c
Yes, it should.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:28 +01:00
Harvey Harrison
cc7e73f35d x86: sparse error in efi_32.c
arch/x86/kernel/efi_32.c:42:6: warning: symbol 'efi_call_phys_prelog' was not declared. Should it be static?
arch/x86/kernel/efi_32.c:84:6: warning: symbol 'efi_call_phys_epilog' was not declared. Should it be static?

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:28 +01:00
Harvey Harrison
f1452d424d x86, kprobes: remove sparse warnings from x86
arch/x86/kernel/kprobes.c:584:16: warning: symbol 'kretprobe_trampoline_holder' was not declared. Should it be static?
arch/x86/kernel/kprobes.c:676:6: warning: symbol 'trampoline_handler' was not declared. Should it be static?

Make them static and add the __used attribute, approach taken from the
arm kprobes implementation.

kretprobe_trampoline_holder uses inline assemly to define the global
symbol kretprobe_trampoline, but nothing ever calls the holder explicitly.

trampoline handler is only called from inline assembly in the same file,
mark it used and static.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Acked-by: Masami Hiramatsu <mhiramat@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:28 +01:00
Adrian Bunk
08cd93f9e1 remove mca-pentium
This patch removes the mca-pentium boot option that was a noop.

besides the source code cleanup factor, this saves some text as well:

   arch/x86/kernel/cpu/bugs.o:
      text    data     bss     dec     hex filename
       651      77       4     732     2dc bugs.o.before
       631      53       4     688     2b0 bugs.o.after

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 16:18:28 +01:00
Arjan van dev Ven
fcea424d31 fix historic ioremap() abuse in AGP
Several AGP drivers right now use ioremap_nocache() on kernel ram in order
to turn a page of regular memory uncached.

There are two problems with this:

    1) This is a total nightmare for the ioremap() implementation to keep
       various mappings of the same page coherent.

    2) It's a total nightmare for the AGP code since it adds a ton of
       complexity in terms of keeping track of 2 different pointers to
       the same thing, in terms of error handling etc etc.

This patch fixes this by making the AGP drivers use the new
set_memory_XX APIs instead.

Note: amd-k7-agp.c is built on Alpha too, and generic.c is built
on ia64 as well, which do not yet have the set_memory_*() APIs,
so for them some we have a few ugly #ifdefs - hopefully they'll
be fixed soon.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Dave Airlie <airlied@linux.ie>
2008-02-19 14:46:39 +10:00
Rusty Russell
f6c540cdd6 x86: fix lguest build failure
drivers/lguest/x86/switcher_32.S:(.text+0x3815f8): 
	undefined reference to `LGUEST_PAGES_regs_trapnum'

This problem was caused by asm-offsets.c only having the offsets when
lguest *guest* support was set, not lguest host (host support used to
imply guest support, so now they're separate these bugs come out).

Lguest guest support and host support are separate config options:
they used to be tied together. Sort out which parts of asm-offsets are
needed for Guest and Host.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-18 20:54:14 +01:00
Yinghai Lu
b7ad149d62 x86: reenable support for system without on node0
One system doesn't have RAM for node0 installed.

SRAT: PXM 0 -> APIC 0 -> Node 0
SRAT: PXM 0 -> APIC 1 -> Node 0
SRAT: PXM 1 -> APIC 2 -> Node 1
SRAT: PXM 1 -> APIC 3 -> Node 1
SRAT: Node 1 PXM 1 0-a0000
SRAT: Node 1 PXM 1 0-dd000000
SRAT: Node 1 PXM 1 0-123000000
ACPI: SLIT: nodes = 2
 10 13
 13 10
mapped APIC to ffffffffff5fb000 (        fee00000)
Bootmem setup node 1 0000000000000000-0000000123000000
  NODE_DATA [000000000000e000 - 0000000000014fff]
  bootmap [0000000000015000 -  00000000000395ff] pages 25
Could not find start_pfn for node 0
Pid: 0, comm: swapper Not tainted 2.6.24-smp-g5a514e21-dirty #14

Call Trace:
 [<ffffffff80bab498>] free_area_init_node+0x22/0x381
 [<ffffffff8045ffc5>] generic_swap+0x0/0x17
 [<ffffffff80bab0cc>] find_zone_movable_pfns_for_nodes+0x54/0x271
 [<ffffffff80baba5f>] free_area_init_nodes+0x239/0x287
 [<ffffffff80ba6311>] paging_init+0x46/0x4c
 [<ffffffff80b9dda5>] setup_arch+0x3c3/0x44e
 [<ffffffff80b978be>] start_kernel+0x6f/0x2c7
 [<ffffffff80b971cc>] _sinittext+0x1cc/0x1d3

This happens because node 0 is not online, but the node state in
mm/page_alloc.c has node 0 set.

        nodemask_t node_states[NR_NODE_STATES] __read_mostly = {
                [N_POSSIBLE] = NODE_MASK_ALL,
                [N_ONLINE] = { { [0] = 1UL } },

So we need to clear node_online_map before initializing the memory.

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-18 20:54:14 +01:00
Thomas Gleixner
f34b439f34 x86: CPA: avoid double checking of alias ranges
When the CPA code is called with an virtual address in the range of
the direct mapping or the high alias then we do not need to run
through the alias check for this range.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-18 20:54:14 +01:00
Thomas Gleixner
af96e4438a x86: CPA no alias checking for _NX
NX settings are not required to be consistent across alias mappings.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-18 20:54:14 +01:00
Thomas Gleixner
31eedd823c x86: zap invalid and unused pmds in early boot
The early boot code maps KERNEL_TEXT_SIZE (currently 40MB) starting
from __START_KERNEL_map. The kernel itself only needs _text to _end
mapped in the high alias. On relocatible kernels the ASM setup code
adjusts the compile time created high mappings to the relocation. This
creates invalid pmd entries for negative offsets:

0xffffffff80000000 -> pmd entry: ffffffffff2001e3
It points outside of the physical address space and is marked present.

This starts at the virtual address __START_KERNEL_map and goes up to
the point where the first valid physical address (0x0) is mapped.

Zap the mappings before _text and after _end right away in early
boot. This removes also the invalid entries.

Furthermore it simplifies the range check for high aliases.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-18 20:54:14 +01:00
Thomas Gleixner
c31c7d4844 x86: CPA, fix alias checks
c_p_a() did not discover all aliases correctly. (such as when called
on vmalloc()-ed areas or ioremap()-ed areas)

Push the alias checks to the lower, physical level and consistently
discover all aliases that might exist: the low direct mappings and
the high linear kernel-text mappings (on 64-bit).

Thanks to Andi Kleen for pointing out that this was buggy.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-18 20:54:14 +01:00
Linus Torvalds
4e3d031945 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  ACPI: DMI: quirk for FSC ESPRIMO Mobile V5505
  ACPI: DMI blacklist updates
  pnpacpi: __initdata is not an identifier
  ACPI: static acpi_chain_head
  ACPI: static acpi_find_dsdt_initrd()
  ACPI: static acpi_no_initrd_override_setup()
  thinkpad_acpi: static
  ACPI suspend: Execute _WAK with the right argument
  cpuidle: Add Documentation
  ACPI, cpuidle: Clarify C-state description in sysfs
  ACPI: fix suspend regression due to idle update
2008-02-14 21:29:46 -08:00
Ingo Molnar
f8d8406bcb x86: cpa, fix out of date comment
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-14 23:30:21 +01:00
Balbir Singh
7d8330a563 KVM is not seen under X86 config with latest git (32 bit compile)
The KVM configuration is no longer visible in the latest git tree. It looks
like it is selected by HAVE_SETUP_PER_CPU_AREA. I've moved HAVE_KVM to
under CONFIG_X86.

Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-14 23:30:21 +01:00
Thomas Gleixner
69b1415e93 x86: cpa: ensure page alignment
the cpa API is page aligned - warn about any weird alignments.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-14 23:30:20 +01:00
Harvey Harrison
7bfeab9af9 x86: include proper prototypes for rodata_test
extern should not appear in C files.  Also, the definitions
do not match the prototype currently, not sure what way you
want to go with this, I've switched the prototype to return
int, but I can see going to the void return as well.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-14 23:30:20 +01:00
Ingo Molnar
184652eb6f x86: fix gart_iommu_init()
When the GART table is unmapped from the kernel direct mappings
during early bootup, make sure we have no leftover cachelines in it.

Note: the clflush done by set_memory_np() was not enough, because
clflush does not work on unmapped pages.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-14 23:30:20 +01:00
Ingo Molnar
3223f59f9c x86: EFI set_memory_x()/set_memory_uc() fixes
The EFI-runtime mapping code changed a larger memory area than it
should have, due to a pages/bytes parameter mixup.

noticed by Andi Kleen.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-14 23:30:20 +01:00
Adrian Bunk
cae30f8270 x86: make dump_pagetable() static
dump_pagetable() can now become static.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-14 23:30:19 +01:00
Ingo Molnar
e8bff74afb x86: fix "BUG: sleeping function called from invalid context" in print_vma_addr()
Jiri Kosina reported the following deadlock scenario with
show_unhandled_signals enabled:

 [   68.379022] gnome-settings-[2941] trap int3 ip:3d2c840f34
 sp:7fff36f5d100 error:0<3>BUG: sleeping function called from invalid
 context at kernel/rwsem.c:21
 [   68.379039] in_atomic():1, irqs_disabled():0
 [   68.379044] no locks held by gnome-settings-/2941.
 [   68.379050] Pid: 2941, comm: gnome-settings- Not tainted 2.6.25-rc1 #30
 [   68.379054]
 [   68.379056] Call Trace:
 [   68.379061]  <#DB>  [<ffffffff81064883>] ? __debug_show_held_locks+0x13/0x30
 [   68.379109]  [<ffffffff81036765>] __might_sleep+0xe5/0x110
 [   68.379123]  [<ffffffff812f2240>] down_read+0x20/0x70
 [   68.379137]  [<ffffffff8109cdca>] print_vma_addr+0x3a/0x110
 [   68.379152]  [<ffffffff8100f435>] do_trap+0xf5/0x170
 [   68.379168]  [<ffffffff8100f52b>] do_int3+0x7b/0xe0
 [   68.379180]  [<ffffffff812f4a6f>] int3+0x9f/0xd0
 [   68.379203]  <<EOE>>
 [   68.379229]  in libglib-2.0.so.0.1505.0[3d2c800000+dc000]

and tracked it down to:

  commit 03252919b7
  Author: Andi Kleen <ak@suse.de>
  Date:   Wed Jan 30 13:33:18 2008 +0100

      x86: print which shared library/executable faulted in segfault etc. messages

the problem is that we call down_read() from an atomic context.

Solve this by returning from print_vma_addr() if the preempt count is
elevated. Update preempt_conditional_sti / preempt_conditional_cli to
unconditionally lift the preempt count even on !CONFIG_PREEMPT.

Reported-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-14 23:30:19 +01:00
Venkatesh Pallipadi
4fcb2fcd4d ACPI, cpuidle: Clarify C-state description in sysfs
Add a new sysfs entry under cpuidle states. desc - can be used by driver to
communicate to userspace any specific information about the state.
This helps in identifying the exact hardware C-states behind the ACPI C-state
definition.

Idea is to export this through powertop, which will help to map the C-state
reported by powertop to actual hardware C-state.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-14 00:09:55 -05:00
Harvey Harrison
c2a9cc7e86 x86: pit_clockevent can be static
arch/x86/kernel/i8253.c:98:27: warning: symbol 'pit_clockevent' was not declared. Should it be static?

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-13 16:20:35 +01:00
Huang, Ying
4de0d4a6d1 x86: EFI runtime code mapping enhancement
This patch enhances EFI runtime code memory mapping as following:

- Move __supported_pte_mask & _PAGE_NX checking before invoking
  runtime_code_page_mkexec(). This makes it possible for compiler to
  eliminate runtime_code_page_mkexec() on machine without NX support.

- Use set_memory_x/nx in early_mapping_set_exec(). This eliminates the
  duplicated implementation.

This patch has been tested on Intel x86_64 platform with EFI64/32
firmware.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-13 16:20:35 +01:00
Thomas Gleixner
e85f20518b x86: EFI: fix use of unitialized variable and the cache logic
Andi Kleen pointed out that the cache attribute logic is reverse in
efi_enter_virtual_mode(). This problem alone is harmless as we do not
(yet) do cache attribute conflict resolution. (This bug was not present
in the original EFI submission - I introduced it while fixing up rejects.)

While reviewing this code I noticed a second, worse problem: the use of
uninitialized md->virt_addr.

Fix both problems.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-13 16:20:35 +01:00
Andi Kleen
5d3c8b21e2 x86: CPA: fix gbpages support in try_preserve_large_page
[ mingo@elte.hu: while gbpages cannot be enabled on mainline currently,
  keep the code uptodate and this fix is easy enough. ]

Use correct page sizes and masks for GB pages in try_preserve_large_page()

This prevents a boot hang on a GB capable system with CONFIG_DIRECT_GBPAGES
enabled.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-13 16:20:35 +01:00
Jeremy Fitzhardinge
2b5407811d xen: unpin initial Xen pagetable once we're finished with it
Unpin the Xen-provided pagetable once we've finished with it, so it
doesn't cause stray references which cause later swapper_pg_dir
pagetable updates to fail.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Tested-by: Jody Belka <knew-linux@pimb.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-13 16:20:35 +01:00
Jeremy Fitzhardinge
37cc8d7f96 x86/early_ioremap: don't assume we're using swapper_pg_dir
At the early stages of boot, before the kernel pagetable has been
fully initialized, a Xen kernel will still be running off the
Xen-provided pagetables rather than swapper_pg_dir[].  Therefore,
readback cr3 to determine the base of the pagetable rather than
assuming swapper_pg_dir[].

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Tested-by: Jody Belka <knew-linux@pimb.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-13 16:20:35 +01:00
Jody Belka
416e2d6379 x86: fixup machine_ops reboot_{32|64}.c unification fallout
When reboot_32.c and reboot_64.c were unified (commit 4d022e35fd...),
the machine_ops code was broken, leading to xen pvops kernels failing
to properly halt/poweroff/reboot etc. This fixes that up.

Signed-off-by: Jody Belka <knew-linux@pimb.org>
Cc: Miguel Boton <mboton@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-13 16:20:35 +01:00
Roland McGrath
2c15826998 x86: vdso_install fix
The makefile magic for installing the 32-bit vdso images on disk had a
little error.  A single-line change would fix that bug, but this does a
little more to reduce the error-prone duplication of this bit of
makefile variable magic.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-11 20:50:09 -08:00
Thomas Gleixner
81772fea41 x86: remove over noisy debug printk
pageattr-test.c contains a noisy debug printk that people reported.
The condition under which it prints (randomly tapping into a mem_map[]
hole and not being able to c_p_a() there) is valid behavior and not
interesting to report.

Remove it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-11 11:24:24 -08:00
Matthew Wilcox
9585ca02f8 Use proper abstractions in quirk_intel_irqbalance
Since we may not have a pci_dev for the device we need to access, we can't
use pci_read_config_word.  But raw_pci_read is an internal implementation
detail; it's better to use the architected pci_bus_read_config_word
interface.  Using PCI_DEVFN instead of a mysterious constant helps
reassure everyone that we really do intend to access device 8.

[ Thanks to Grant Grundler for pointing out to me that this is exactly
  what the write immediately above this is doing -- enabling device 8 to
  respond to config space cycles.
					- Matthew

  Grant also says:

	"Can you also add a comment which points at the Intel
	 documentation?

	 The 'Intel E7320 Memory Controller Hub (MCH) Datasheet' at

	  http://download.intel.com/design/chipsets/datashts/30300702.pdf

	 Page 69 documents register F4h (DEVPRES1).

	 And I just doubled checked that the 0xf4 register value is
	 restored later in the quirk (obvious when you look at the code
	 but not from the patch"

  so here it is.
					 - Linus ]

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Acked-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-11 08:15:03 -08:00
Matthew Wilcox
b6ce068a12 Change pci_raw_ops to pci_raw_read/write
We want to allow different implementations of pci_raw_ops for standard
and extended config space on x86.  Rather than clutter generic code with
knowledge of this, we make pci_raw_ops private to x86 and use it to
implement the new raw interface -- raw_pci_read() and raw_pci_write().

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-10 12:52:46 -08:00
Ivan Kokshaysky
a0ca990960 PCI x86: always use conf1 to access config space below 256 bytes
Thanks to Loic Prylli <loic@myri.com>, who originally proposed
this idea.

Always using legacy configuration mechanism for the legacy config space
and extended mechanism (mmconf) for the extended config space is
a simple and very logical approach. It's supposed to resolve all
known mmconf problems. It still allows per-device quirks (tweaking
dev->cfg_size). It also allows to get rid of mmconf fallback code.

Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-10 12:52:45 -08:00
Linus Torvalds
0b6ca82af8 Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86
* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: (32 commits)
  x86: cpa, strict range check in try_preserve_large_page()
  x86: cpa, enable CONFIG_DEBUG_PAGEALLOC on 64-bit
  x86: cpa, use page pool
  x86: introduce page pool in cpa
  x86: DEBUG_PAGEALLOC: enable after mem_init()
  brk: help text typo fix
  lguest: accept guest _PAGE_PWT page table entries
  x86 PM: update stale comments
  x86 PM: consolidate suspend and hibernation code
  x86 PM: rename 32-bit files in arch/x86/power
  x86 PM: move 64-bit hibernation files to arch/x86/power
  x86: trivial printk optimizations
  x86: fix early_ioremap pagetable ops
  x86: construct 32-bit boot time page tables in native format.
  x86, core: remove CONFIG_FORCED_INLINING
  x86: avoid unused variable warning in mm/init_64.c
  x86: fixup more paravirt fallout
  brk: document randomize_va_space and CONFIG_COMPAT_BRK (was Re:
  x86: fix sparse warnings in acpi/bus.c
  x86: fix sparse warning in topology.c
  ...
2008-02-09 23:29:57 -08:00
S.Çağlar Onur
3b35632973 Update arch/x86/boot/.gitignore with new auto-generated files
Signed-off-by: S.Çağlar Onur <caglar@pardus.org.tr>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-09 23:27:01 -08:00
Thomas Gleixner
fac8493960 x86: cpa, strict range check in try_preserve_large_page()
Right now, we check only the first 4k page for static required protections.
This does not take overlapping regions into account. So we might end up
setting the wrong permissions/protections for other parts of this large page.

This can be optimized further, but correctness is the important part.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-09 23:24:09 +01:00
Thomas Gleixner
b1d95f4e41 x86: cpa, enable CONFIG_DEBUG_PAGEALLOC on 64-bit
Now, that the page pool is in place we can enable DEBUG_PAGEALLOC on
64bit.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-09 23:24:09 +01:00
Thomas Gleixner
eb5b5f024c x86: cpa, use page pool
Switch the split page code to use the page pool. We do this
unconditionally to avoid different behaviour with and without
DEBUG_PAGEALLOC enabled.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-09 23:24:09 +01:00