Commit Graph

7505 Commits

Author SHA1 Message Date
Andi Kleen
1dcdb5a9e7 oprofile: re-add force_arch_perfmon option
This re-adds the force_arch_perfmon option that was in the original
arch perfmon patchkit. Originally this was rejected in favour
of a generalized perfmon=name option, but it turned out implementing
the later in a reliable way is hard (and it would have been easy
to crash the kernel if a user gets it wrong)

But now Atom and Core i7 support being readded a user would
need to update their oprofile userland to beyond 0.9.4 to use oprofile again
on Atom or Core i7.

To avoid this problem readd the force_arch_perfmon option.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-05-08 11:06:33 +02:00
Hidetoshi Seto
e5299926d7 x86: MCE: make cmci_discover_lock irq-safe
Lockdep reports the warning below when Li tries to offline one cpu:

[  110.835487] =================================
[  110.835616] [ INFO: inconsistent lock state ]
[  110.835688] 2.6.30-rc4-00336-g8c9ed89 
[  110.835757] ---------------------------------
[  110.835828] inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
[  110.835908] swapper/0 [HC1[1]:SC0[0]:HE0:SE1] takes:
[  110.835982]  (cmci_discover_lock){?.+...}, at: [<ffffffff80236dc0>] cmci_clear+0x30/0x9b

cmci_clear() can be called via smp_call_function_single().

It is better to disable interrupt while holding cmci_discover_lock,
to turn it into an irq-safe lock - we can deadlock otherwise.

[ Impact: fix possible deadlock in the MCE code ]

Reported-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <4A03ED38.8000700@jp.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Reported-by: Shaohua Li<shaohua.li@intel.com>
2009-05-08 11:03:26 +02:00
Jeremy Fitzhardinge
6b2e8523df xen: reserve Xen start_info rather than e820 reserving
Use reserve_early rather than e820 reservations for Xen start info and mfn->pfn
table, so that the memory use is a bit more self-documenting.

[ Impact: cleanup ]

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Xen-devel <xen-devel@lists.xensource.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <4A032EF1.6070708@goop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-08 10:51:03 +02:00
Ingo Molnar
f066a15533 Merge branch 'x86/urgent' into x86/xen
Conflicts:
	arch/frv/include/asm/pgtable.h
	arch/x86/include/asm/required-features.h
	arch/x86/xen/mmu.c

Merge reason: x86/xen was on a .29 base still, move it to a fresher
              branch and pick up Xen fixes as well, plus resolve
              conflicts

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-08 10:50:00 +02:00
Jeremy Fitzhardinge
33df4db04a x86: xen, i386: reserve Xen pagetables
The Xen pagetables are no longer implicitly reserved as part of the other
i386_start_kernel reservations, so make sure we explicitly reserve them.
This prevents them from being released into the general kernel free page
pool and reused.

[ Impact: fix Xen guest crash ]

Also-Bisected-by: Bryan Donlan <bdonlan@gmail.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Xen-devel <xen-devel@lists.xensource.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <4A032EEC.30509@goop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-08 10:49:11 +02:00
Huang Ying
6407df5ca5 x86, kexec: fix crashdump panic with CONFIG_KEXEC_JUMP
Tim Starling reported that crashdump will panic with kernel compiled
with CONFIG_KEXEC_JUMP due to null pointer deference in
machine_kexec_32.c: machine_kexec(), when deferencing
kexec_image. Refering to:

http://bugzilla.kernel.org/show_bug.cgi?id=13265

This patch fixes the BUG via replacing global variable reference:
kexec_image in machine_kexec() with local variable reference: image,
which is more appropriate, and will not be null.

Same BUG is in machine_kexec_64.c too, so fixed too in the same way.

[ Impact: fix crash on kexec ]

Reported-by: Tim Starling <tstarling@wikimedia.org>
Signed-off-by: Huang Ying <ying.huang@intel.com>
LKML-Reference: <1241751101.6259.85.camel@yhuang-dev.sh.intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-07 22:01:05 -07:00
Jan Beulich
4983439676 x86-64: finish cleanup_highmaps()'s job wrt. _brk_end
With the introduction of the .brk section, special care must be taken
that no unused page table entries remain if _brk_end and _end are
separated by a 2M page boundary. cleanup_highmap() runs very early and
hence cannot take care of that, hence potential entries needing to be
removed past _brk_end must be cleared once the brk allocator has done
its job.

[ Impact: avoids undesirable TLB aliases ]

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-07 21:51:34 -07:00
Jan Beulich
6143876651 x86: fix boot hang in early_reserve_e820()
If the first non-reserved (sub-)range doesn't fit the size requested,
an endless loop will be entered. If a range returned from
find_e820_area_size() turns out insufficient in size, the range must
be skipped before calling the function again.

[ Impact: fixes boot hang on some platforms ]

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-07 21:42:39 -07:00
Ingo Molnar
0ad5d703c6 Merge branch 'tracing/hw-branch-tracing' into tracing/core
Merge reason: this topic is ready for upstream now. It passed
              Oleg's review and Andrew had no further mm/*
              objections/observations either.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-07 13:36:22 +02:00
Ingo Molnar
44347d947f Merge branch 'linus' into tracing/core
Merge reason: tracing/core was on a .30-rc1 base and was missing out on
              on a handful of tracing fixes present in .30-rc5-almost.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-07 11:17:34 +02:00
Ingo Molnar
643bec9565 x86: clean up arch/x86/kernel/tsc_sync.c a bit
- remove unused define
 - make the lock variable definition stand out some more
 - convert KERN_* to pr_info() / pr_warning()

[ Impact: cleanup ]

LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-07 09:32:10 +02:00
Samuel Bronson
975e5f4550 x86: use symbolic name for VM86_SIGNAL when used as vm86 default return
This code has apparently used "0" and not VM86_SIGNAL since Linux
1.1.9, when Linus added VM86_SIGNAL to vm86.h. This patch changes the
code to use the symbolic name.

The magic 0 tripped me up in trying to extend the vm86(2) manpage to
actually explain vm86()'s interface -- my greps for VM86_SIGNAL came up
fruitless.

[ Impact: cleanup; no object code change ]

Signed-off-by: Samuel Bronson <naesten@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-06 20:35:26 -07:00
Nikanth Karthikesan
e0e5ea3268 x86: Fix a typo in a printk message
[ Impact: printk message cleanup ]

Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>
LKML-Reference: <200905040908.27299.knikanth@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-06 12:23:12 +02:00
David Rientjes
7eccf7b227 x86, srat: do not register nodes beyond e820 map
The mem= option will truncate the memory map at a specified address so
it's not possible to register nodes with memory beyond the e820 upper
bound.

unparse_node() is only called when then node had memory associated with
it, although with the mem= option it is no longer addressable.

[ Impact: fix boot hang on certain (large) systems ]

Reported-by: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <alpine.DEB.2.00.0905051248150.20021@chino.kir.corp.google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-06 10:49:07 +02:00
Rik van Riel
c898faf91b x86: 46 bit physical address support on 64 bits
Extend the maximum addressable memory on x86-64 from 2^44 to
2^46 bytes. This requires some shuffling around of the vmalloc
and virtual memmap memory areas, to keep them away from the
direct mapping of up to 64TB of physical memory.

This patch also introduces a guard hole between the vmalloc
area and the virtual memory map space.  There's really no
good reason why we wouldn't have a guard hole there.

[ Impact: future hardware enablement ]

Signed-off-by: Rik van Riel <riel@redhat.com>
LKML-Reference: <20090505172856.6820db22@cuia.bos.redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-05 19:10:18 -07:00
Linus Torvalds
e91b3b2681 Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  tracing: x86, mmiotrace: fix range test
  tracing: fix ref count in splice pages
2009-05-05 12:08:02 -07:00
Linus Torvalds
5e30302b9e Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: show number of core_siblings instead of thread_siblings in /proc/cpuinfo
  amd-iommu: fix iommu flag masks
  x86: initialize io_bitmap_base on 32bit
  x86: gettimeofday() vDSO: fix segfault when tv == NULL
2009-05-05 12:07:21 -07:00
Andreas Herrmann
35d11680a9 x86: show number of core_siblings instead of thread_siblings in /proc/cpuinfo
Commit 7ad728f981
(cpumask: x86: convert cpu_sibling_map/cpu_core_map to cpumask_var_t)
changed the output of /proc/cpuinfo for siblings:

Example on an AMD Phenom:

  physical id   : 0
  siblings : 1
  core id	   : 3
  cpu cores  : 4

Before that commit it was:

  physical id	: 0
  siblings : 4
  core id	   : 3
  cpu cores  : 4

Instead of cpu_core_mask it now uses cpu_sibling_mask to count siblings.
This is due to the following hunk of above commit:

|  --- a/arch/x86/kernel/cpu/proc.c
|  +++ b/arch/x86/kernel/cpu/proc.c
|  @@ -14,7 +14,7 @@ static void show_cpuinfo_core(struct seq_file *m, struct cpuinf
|          if (c->x86_max_cores * smp_num_siblings > 1) {
|                  seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
|                  seq_printf(m, "siblings\t: %d\n",
|  -                          cpus_weight(per_cpu(cpu_core_map, cpu)));
|  +                          cpumask_weight(cpu_sibling_mask(cpu)));
|                  seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
|                  seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
|                  seq_printf(m, "apicid\t\t: %d\n", c->apicid);

This was a mistake, because the impact line shows that this side-effect
was not anticipated:

   Impact: reduce per-cpu size for CONFIG_CPUMASK_OFFSTACK=y

So revert the respective hunk to restore the old behavior.

[ Impact: fix sibling-info regression in /proc/cpuinfo ]

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <20090504182859.GA29045@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-04 20:36:49 +02:00
Joerg Roedel
6da7342ff1 amd-iommu: fix iommu flag masks
The feature bits should be set via bitmasks, not via feature IDs.

[ Impact: fix feature enabling in newer IOMMU versions ]

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
LKML-Reference: <20090504102028.GA30307@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-04 15:05:24 +02:00
Cyrill Gorcunov
9a8709d441 x86: uv - prevent NULL dereference in uv_system_init()
We may reach NULL dereference oops if kmalloc failed.
Prevent it with explicit BUG_ON.

[ Impact: more controlled assert in 'impossible' scenario ]

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20090501202511.GE4633@lenovo>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-03 10:49:31 +02:00
Jaswinder Singh Rajput
3969c52d4d x86: cpufeature.h fix name for X86_FEATURE_MCE
X86_FEATURE_MCE = Machine Check Exception
X86_FEATURE_MCA = Machine Check Architecture

[ Impact: cleanup ]

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
LKML-Reference: <1241329295.6321.1.camel@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-03 10:40:57 +02:00
Cyrill Gorcunov
1cbac972ba x86: uv io-apic - use BUILD_BUG_ON instead of BUG_ON
The expression is known to be true/false at compilation
time so we're allowed to use build-time instead of
run-time check. Also align 'entry' items assignment.

[ Impact: shrink kernel a bit, cleanup ]

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20090502093956.GB4791@lenovo>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-03 10:38:21 +02:00
Ingo Molnar
a454ab3110 x86, mm: fault.c, use printk_once() in is_errata93()
Andrew pointed out that the 'once' variable has a needlessly
function-global scope. We can in fact eliminate it completely,
via the use of printk_once().

[ Impact: cleanup ]

Reported-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-03 10:09:03 +02:00
Linus Torvalds
bb402c4fb5 Merge branch 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip
* 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip:
  x86, mce: fix boot logging logic
  x86, mce: make polling timer interval per CPU
2009-05-02 16:38:30 -07:00
Cyrill Gorcunov
6f0aced639 x86, apic: use pr_ macro
Replace recenly appeared printk with pr_ macro
(the file already use a lot of them).

[ Impact: cleanup ]

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
LKML-Reference: <20090501195425.GB4633@lenovo>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-01 21:56:25 +02:00
Thomas Gleixner
f9a196b8dc x86: initialize io_bitmap_base on 32bit
commit db949bba3c (x86-32: use non-lazy
io bitmap context switching) broke ioperm for 32bit because it removed
the lazy initialization of io_bitmap_base and did not set it to the
real bitmap offset.

[ Impact: fix non-working sys_ioperm() on 32-bit kernels ]

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2009-05-01 21:09:53 +02:00
Ingo Molnar
4420471f14 Merge branch 'x86/apic' into irq/numa
Conflicts:
	arch/x86/kernel/apic/io_apic.c

Merge reason: non-trivial interaction between ongoing work in io_apic.c
              and the NUMA migration feature in the irq tree.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-01 19:02:50 +02:00
Yinghai Lu
15e957d08d x86/irq: use move_irq_desc() in create_irq_nr()
move_irq_desc() will try to move irq_desc to the home node if
the allocated one is not correct, in create_irq_nr().

( This can happen on devices that are on different nodes that
  are using MSI, when drivers are loaded and unloaded randomly. )

v2: fix non-smp build
v3: add NUMA_IRQ_DESC to eliminate #ifdefs

[ Impact: improve irq descriptor locality on NUMA systems ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <49F95EAE.2050903@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-01 19:01:12 +02:00
Remis Lima Baima
bf293c17b2 x86: added 'ifndef _ASM_X86_IOMAP_H' to iomap.h
iomap.h misses the include guards.

[ Impact: cleanup ]

Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
LKML-Reference: <200904301836.23885.arnd@arndb.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-30 19:26:11 +02:00
Thomas Gleixner
12d161147f x86: hookup sys_rt_tgsigqueueinfo
Make the new sys_rt_tgsigqueueinfo available for x86.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2009-04-30 19:24:24 +02:00
Sam Ravnborg
83c4832683 x86: boot/compressed/vmlinux.lds.S: fix build of bzImage with 64 bit compiler
Jesper reported that he saw following build issue:

 > ld:arch/x86/boot/compressed/vmlinux.lds:9: syntax error
 > make[2]: *** [arch/x86/boot/compressed/vmlinux] Error 1
 > make[1]: *** [arch/x86/boot/compressed/vmlinux] Error 2
 > make: *** [bzImage] Error 2

CPP defines the symbol "i386" to "1".
Undefine this to fix it.

[ Impact: build fix with certain tool chains ]

Reported-by: Jesper Dangaard Brouer <jdb@comx.dk>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <alpine.LFD.2.00.0904260958190.3101@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-30 12:36:50 +02:00
John Wright
2f65dd475c x86: gettimeofday() vDSO: fix segfault when tv == NULL
According to the gettimeofday(2) manual:

       If either tv or tz is NULL, the corresponding structure is not
       set or returned.

Since it is legal to give NULL as the tv argument, the code should make
sure tv is not NULL before trying to dereference it.

This issue manifests itself on x86_64 when vdso=0 is not on the kernel
command-line and libc uses the vDSO for gettimeofday() (e.g. glibc >=
2.7).  A simple reproducer:

  #include <stdio.h>
  #include <sys/time.h>

  int main(void)
  {
      struct timezone tz;

      gettimeofday(NULL, &tz);

      return 0;
  }

See http://bugs.debian.org/466491 for more details.

[ Impact: fix gettimeofday(NULL, &tz) segfault ]

Signed-off-by: John Wright <john.wright@hp.com>
Cc: Andi Kleen <ak@suse.de>
Cc: John Wright <john.wright@hp.com>
LKML-Reference: <1241037121-14805-1-git-send-email-john.wright@hp.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-30 12:31:45 +02:00
Pekka Enberg
9518e0e435 x86: move per-cpu mmu_gathers to mm/init.c
[ Impact: cleanup ]

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
LKML-Reference: <1240923650.1982.22.camel@penberg-laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-30 10:12:37 +02:00
Pekka Enberg
2b72394e40 x86: move max_pfn_mapped and max_low_pfn_mapped to setup.c
This patch moves the max_pfn_mapped and max_low_pfn_mapped global
variables to kernel/setup.c where they're initialized.

[ Impact: cleanup ]

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
LKML-Reference: <1240923649.1982.21.camel@penberg-laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-30 10:12:36 +02:00
Ingo Molnar
fd07319443 x86, vmlinux.lds: fix relocatable symbols
__init_begin/_end symbols should be inside sections as well,
otherwise the relocatable kernel gets confused when freeing
init sections in the wrong place.

[ Impact: fix bootup crash ]

Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <20090429105056.GA28720@uranus.ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 13:01:18 +02:00
Stuart Bennett
0f9a623dd6 tracing: x86, mmiotrace: only register for die notifier when tracer active
Follow up to afcfe024ae in Linus' tree
("x86: mmiotrace: quieten spurious warning message")

Signed-off-by: Stuart Bennett <stuart@freedesktop.org>
Acked-by: Pekka Paalanen <pq@iki.fi>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1240946271-7083-5-git-send-email-stuart@freedesktop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 11:33:34 +02:00
Stuart Bennett
46e91d00b1 tracing: x86, mmiotrace: refactor clearing/restore of page presence
* change function names to clear_* from set_*: in reality we only clear
  and restore page presence, and never unconditionally set present.
  Using clear_*({true, false}, ...) is therefore more honest than
  set_*({false, true}, ...)

* upgrade presence storage to pteval_t: doing user-space tracing will
  require saving and manipulation of the _PAGE_PROTNONE bit, in addition
  to the existing _PAGE_PRESENT changes, and having multiple bools stored
  and passed around does not seem optimal

[ Impact: refactor, clean up mmiotrace code ]

Signed-off-by: Stuart Bennett <stuart@freedesktop.org>
Acked-by: Pekka Paalanen <pq@iki.fi>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1240946271-7083-4-git-send-email-stuart@freedesktop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 11:33:33 +02:00
Stuart Bennett
0492e1bb8f tracing: x86, mmiotrace: code consistency/legibility improvement
kmmio_probe being *p and kmmio_fault_page being sometimes *f and
sometimes *p is not helpful.

[ Impact: cleanup ]

Signed-off-by: Stuart Bennett <stuart@freedesktop.org>
Acked-by: Pekka Paalanen <pq@iki.fi>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1240946271-7083-3-git-send-email-stuart@freedesktop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 11:33:33 +02:00
Stuart Bennett
33015c8599 tracing: x86, mmiotrace: fix range test
Matching on (addr == (p->addr + p->len)) causes problems when mappings
are adjacent.

[ Impact: fix mmiotrace confusion on adjacent iomaps ]

Signed-off-by: Stuart Bennett <stuart@freedesktop.org>
Acked-by: Pekka Paalanen <pq@iki.fi>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1240946271-7083-2-git-send-email-stuart@freedesktop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 11:32:22 +02:00
Ingo Molnar
91fd7fe809 x86, vmlinux.lds: add copyright
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1240991249-27117-2-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 11:00:25 +02:00
Sam Ravnborg
091e52c355 x86, vmlinux.lds: unify remaining parts
32 bit:
- explicit page align .bss
- move ALING() out of .brk output section
- discard *(.eh_frame)

64 bit:
- move ALIGN() out of .bss output section
- move ALIGN() out of .brk output section
- use a dedicated section to define _end

[ Impact: unify and fix section alignments in linker script ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1240991249-27117-13-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 10:20:35 +02:00
Sam Ravnborg
9d16e78318 x86, vmlinux.lds: unify percpu
32 bit:
- move __init_end outside the .bss output section
  It really did not belong in there

[ Impact: 64-bit: cleanup, 32-bit: refactor linker script ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1240991249-27117-12-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 10:20:34 +02:00
Sam Ravnborg
bf6a57418d x86, vmlinux.lds: unify .exit.* and .init.ramfs
[ Impact: cleanup ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1240991249-27117-11-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 10:20:34 +02:00
Sam Ravnborg
ae61836289 x86, vmlinux.lds: unify parainstructions
32 bit:

 - increase alignment from 4 to 8 for .parainstructions
 - increase alignment from 4 to 8 for .altinstructions

64 bit:

 - move ALIGN() outside output section for .altinstructions

None of the above should result in any functional change.

[ Impact: refactor and unify linker script ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1240991249-27117-10-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 10:20:33 +02:00
Sam Ravnborg
e58bdaa8f8 x86, vmlinux.lds: unify first part of initdata
32-bit:

 - Move definition of __init_begin outside output_section
   because it covers more than one section
 - Move ALIGN() for end-of-section inside .smp_locks output section.
   Same effect but the intent is better documented that
   we need both start and end aligned.

64-bit:

 - Move ALIGN() outside output section in .init.setup
 - Deleted unused __smp_alt_* symbols

None of the above should result in any functional change.

[ Impact: refactor and unify linker script ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1240991249-27117-9-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 10:20:33 +02:00
Sam Ravnborg
ff6f87e162 x86, vmlinux.lds: move vsyscall output sections
[ Impact: cleanup ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1240991249-27117-8-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 10:20:32 +02:00
Sam Ravnborg
1f6397bac5 x86, vmlinux.lds: unify data output sections
For 64 bit the following functional changes are introduced:

 - .data.page_aligned has moved
 - .data.cacheline_aligned has moved
 - .data.read_mostly has moved
 - ALIGN() moved out of output section for .data.cacheline_aligned
 - ALIGN() moved out of output section for .data.page_aligned

Notice that 32 bit and 64 bit has different location of _edata.
.data_nosave is 32 bit only as 64 bit is special due to PERCPU.

[ Impact: 32-bit: cleanup, 64-bit: use 32-bit linker script ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1240991249-27117-7-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 10:20:32 +02:00
Sam Ravnborg
448bc3ab0d x86, vmlinux.lds: unify exception table
[ Impact: cleanup ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1240991249-27117-6-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 10:20:31 +02:00
Sam Ravnborg
dfc20895d9 x86, vmlinux.lds: unify .text output sections
32 bit x86 had a dedicated .text.head output section,
whereas 64 bit had it all in a single output section.

In the unified version the dedicated .text.head output section
was kept to have full control over the head code.

32 bit:

- Moved definition of _stext to the linker script.
  The definition is located _after_ .text.page_aligned as this
  is what 32 bit did before.

The ALIGN(8) was introduced so we hit the exact same address
(on the tested config) before and after the move.

I assume that it is a bug that _stext did not cover the
.text.page_aligned section - if this is true it can be fixed
in a follow-up patch (and the ugly ALIGN() can be dropped).

[ Impact: 64-bit: cleanup, 32-bit: use the 64-bit linker script ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1240991249-27117-5-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 10:20:31 +02:00
Sam Ravnborg
444e0ae483 x86, vmlinux.lds: unify start/end of SECTIONS
[ Impact: cleanup ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1240991249-27117-4-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 10:20:30 +02:00
Sam Ravnborg
afb8095a7e x86, vmlinux.lds: unify PHDRS
PHDRS are not equal for the two - so
use ifdefs to cover up for that.

On the assumption that they may become equal the ifdef
is inside the PHDRS definiton.

[ Impact: cleanup ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1240991249-27117-3-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 10:20:30 +02:00
Sam Ravnborg
17ce265d6a x86, vmlinux.lds: unify header/footer
Merge everything except PHDRS and SECTIONS into
vmlinux.lds.S.

[ Impact: cleanup ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1240991249-27117-2-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 10:20:29 +02:00
Sam Ravnborg
aee6a166a5 x86: beautify vmlinux_32.lds.S
Beautify vmlinux_32.lds.S:

 - Use tabs for indent
 - Located curly braces like in C code
 - Rearranged a few comments

To see actual differences use "git diff -b" which
ignore 'whitespace' changes.

The beautification is done to prepare a unification
of the _32 and _64 variants of the linker scripts.

[ Impact: cleanup ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1240991249-27117-1-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29 10:20:29 +02:00
Mathieu Desnoyers
edc953fa4e x86: clean up alternative.h
Alternative header duplicates assembly that could be merged in
one single macro.  Merging this into this macro also allows to
directly declare ALTERNATIVE() statements within assembly code.

Uses a __stringify() of the feature bits rather than passing a
"i" operand.  Leave the old %0 operand as-is (set to 0), unused
to stay compatible with API.

(v2: tab alignment fixes)

[ Impact: cleanup ]

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
LKML-Reference: <20090428151346.GA31212@Krystal>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-28 17:42:08 +02:00
Yinghai Lu
d047f53a2e x86/irq: change MSI irq_desc to be more numa aware
Try to get irq_desc on the home node in create_irq_nr().

v2: don't check if we can move it when sparse_irq is not used
v3: use move_irq_des, if that node is not what we want

[ Impact: optimization, make MSI IRQ descriptors more NUMA aware ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <49F6559F.7070005@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-28 12:21:18 +02:00
Yinghai Lu
024154cfdd irq: change io_apic_set_pci_routing() to use device parameter
Make actual use of the device parameter passed down to
io_apic_set_pci_routing() - to have the IRQ descriptor
on the home node of the device.

If no device has been passed down, we assume it's a platform
device and use the boot node ID for the IRQ descriptor.

[ Impact: optimization, make IO-APIC code more NUMA aware ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <49F6557E.3080101@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-28 12:21:18 +02:00
Yinghai Lu
a2f809b08a irq: change ACPI GSI APIs to also take a device argument
We want to use dev_to_node() later on, to be aware of the 'home node'
of the GSI in question.

[ Impact: cleanup, prepare the IRQ code to be more NUMA aware ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Len Brown <lenb@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Len Brown <lenb@kernel.org>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-acpi@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
LKML-Reference: <49F65560.20904@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-28 12:21:17 +02:00
Yinghai Lu
85ac16d033 x86/irq: change irq_desc_alloc() to take node instead of cpu
This simplifies the node awareness of the code. All our allocators
only deal with a NUMA node ID locality not with CPU ids anyway - so
there's no need to maintain (and transform) a CPU id all across the
IRq layer.

v2: keep move_irq_desc related

[ Impact: cleanup, prepare IRQ code to be NUMA-aware ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
LKML-Reference: <49F65536.2020300@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-28 12:21:17 +02:00
Yinghai Lu
d5dedd4507 irq: change ->set_affinity() to return status
according to Ingo, change set_affinity() in irq_chip should return int,
because that way we can handle failure cases in a much cleaner way, in
the genirq layer.

v2: fix two typos

[ Impact: extend API ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: linux-arch@vger.kernel.org
LKML-Reference: <49F654E9.4070809@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-28 12:21:16 +02:00
Yinghai Lu
fcef5911c7 x86/irq: remove leftover code from NUMA_MIGRATE_IRQ_DESC
The original feature of migrating irq_desc dynamic was too fragile
and was causing problems: it caused crashes on systems with lots of
cards with MSI-X when user-space irq-balancer was enabled.

We now have new patches that create irq_desc according to device
numa node. This patch removes the leftover bits of the dynamic balancer.

[ Impact: remove dead code ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <49F654AF.8000808@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-28 12:21:15 +02:00
Linus Torvalds
3fb8e49200 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  PCI: only save/restore existent registers in the PCIe capability
  x86/PCI: don't bother with root quirks if _CRS is used
  docbooks: add/fix PCI kernel-doc
  PCI: cleanup debug output resources
  x86/PCI: set_pci_bus_resources_arch_default cleanups
  x86/PCI: Move set_pci_bus_resources_arch_default into arch/x86
  x86/PCI: don't call e820_all_mapped with -1 in the mmconfig case
  PCI quirk: disable MSI on VIA VT3364 chipsets
2009-04-27 11:59:46 -07:00
Yinghai Lu
e0e42142ba x86: Use dmi check in apic_is_clustered() on 64-bit to mark the TSC unstable
We will have systems with 2 and more sockets 8cores/2thread,
but we treat them as multi chassis - while they could have
a stable TSC domain.

Use DMI check instead.

[ Impact: do not turn possibly stable TSCs off incorrectly ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Ravikiran Thirumalai <kiran@scalex86.org>
LKML-Reference: <49F5532A.5000802@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-27 09:23:52 +02:00
Yinghai Lu
b2ba83ff4f x86: apic: Remove duplicated macros
XAPIC_DEST_* is dupliicated to the one in apicdef.h

[ Impact: cleanup ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <49F552D0.5050505@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-27 09:13:36 +02:00
Linus Torvalds
51b26ada79 x86: unify arch/x86/boot/compressed/vmlinux_*.lds
Look at the:

	diff -u arch/x86/boot/compressed/vmlinux_*.lds

output and realize that they're basially exactly the same except for
trivial naming differences, and the fact that the 64-bit version has a
"pgtable" thing.

So unify them.

There's some trivial cleanup there (make the output format a Kconfig thing
rather than doing #ifdef's for it, and unify both 32-bit and 64-bit BSS
end to "_ebss", where 32-bit used to use the traditional "_end"), but
other than that it's really very mindless and straigt conversion.

For example, I think we should aim to remove "startup_32" vs "startup_64",
and just call it "startup", and get rid of one more difference. I didn't
do that.

Also, notice the comment in the unified vmlinux.lds.S talks about
"head_64" and "startup_32" which is an odd and incorrect mix, but that was
actually what the old 64-bit only lds file had, so the confusion isn't
new, and now that mixing is arguably more accurate thanks to the
vmlinux.lds.S file being shared between the two cases ;)

[ Impact: cleanup, unification ]

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-27 06:35:24 +02:00
Sam Ravnborg
0a3ec21fcd x86: beautify vmlinux_64.lds.S
Beautify vmlinux_64.lds.S:

 - Use tabs for indent
 - Located curly braces like in C code
 - Rearranged a few comments

There is no functional changes in this patch

The beautification is done to prepare a unification
of the _32 and the _64 variants of the linker scripts.

[ Impact: cleanup ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Tim Abbott <tabbott@MIT.EDU>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <20090426210742.GA3464@uranus.ravnborg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-27 06:30:58 +02:00
Linus Torvalds
9b820a8c5f Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, hpet: Stop soliciting hpet=force users on ICH4M
  x86: check boundary in setup_node_bootmem()
  uv_time: add parameter to uv_read_rtc()
  x86: hpet: fix periodic mode programming on AMD 81xx
  x86: more than 8 32-bit CPUs requires X86_BIGSMP
  x86: avoid theoretical spurious NMI backtraces with CONFIG_CPUMASK_OFFSTACK=y
  x86: fix boot crash in NMI watchdog with CONFIG_CPUMASK_OFFSTACK=y and flat APIC
  x86-64: fix FPU corruption with signals and preemption
  x86/uv: fix for no memory at paddr 0
  docs, x86: add nox2apic back to kernel-parameters.txt
  x86: mm/numa_32.c calculate_numa_remap_pages should use __init
  x86, kbuild: make "make install" not depend on vmlinux
  x86/uv: fix init of cpu-less nodes
  x86/uv: fix init of memory-less nodes
2009-04-26 10:29:38 -07:00
Linus Torvalds
fc2e3180a7 Merge branch 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86/irq: mark NUMA_MIGRATE_IRQ_DESC broken
  x86, irq: Remove IRQ_DISABLED check in process context IRQ move
2009-04-26 10:29:18 -07:00
Linus Torvalds
1e4b978154 Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  locking: clarify kernel-taint warning message
  lockdep, x86: account for irqs enabled in paranoid_exit
  lockdep: more robust lockdep_map init sequence
2009-04-26 10:29:01 -07:00
Linus Torvalds
ef54b1bb2e 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: (34 commits)
  ACPI, i915: Register ACPI video even when not modesetting
  Revert "ACPICA: delete check for AML access to port 0x81-83"
  I/O port protection: update for windows compatibility.
  sony-laptop: always try to unblock rfkill on load
  sony-laptop: fix bogus error message display on resume
  ACPI: EC: Fix ACPI EC resume non-query interrupt message
  sony-laptop: SNC input event 38 fix
  sony-laptop: SNC 127 Initialization Fix
  sony-laptop: Duplicate SNC 127 Event Fix
  ACPI: prevent processor.max_cstate=0 boot crash
  ACPI/hpet: prevent boot hang when hpet=force used on ICH-4M
  ACPI: delete obsolete "bus master activity" proc field
  ACPI: idle: mark_tsc_unstable() at init-time, not run-time
  ACPI: add /sys/firmware/acpi/interrupts/sci_not counter
  ACPI video: fix an error when the brightness levels on AC and on Battery are same
  acpi-cpufreq: Do not let get_measured perf depend on internal variable
  acpi-cpufreq: style-only: add parens to math expression
  acpi-cpufreq: Cleanup: Use printk_once
  x86, acpi_cpufreq: Fix the NULL pointer dereference in get_measured_perf
  thinkpad-acpi: bump up version to 0.23
  ...
2009-04-24 08:48:17 -07:00
Markus Metzger
1cb81b143f x86, bts, mm: clean up buffer allocation
The current mm interface is asymetric. One function allocates a locked
buffer, another function only refunds the memory.

Change this to have two functions for accounting and refunding locked
memory, respectively; and do the actual buffer allocation in ptrace.

[ Impact: refactor BTS buffer allocation code ]

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20090424095143.A30265@sedona.ch.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-24 10:18:52 +02:00
Markus Metzger
7e0bfad24d x86, bts: reenable ptrace branch trace support
The races found by Oleg Nesterov have been fixed.

Reenable branch trace support.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
LKML-Reference: <20090424094448.A30216@sedona.ch.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-24 10:18:51 +02:00
Markus Metzger
782cc5ae63 x86, ds: fix buffer alignment in debug store selftest
The debug store selftest code uses a stack-allocated buffer, which is
not necessarily correctly aligned.

For tests using a buffer to hold a single entry, the buffer that is
passed to ds_request must already be suitably aligned.

Pass a suitably aligned portion of the bigger buffer.

[ Impact: fix hw-branch-tracer self-test failure ]

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Cc: markus.t.metzger@gmail.com
LKML-Reference: <20090424094309.A30145@sedona.ch.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-24 10:18:51 +02:00
Ingo Molnar
416dfdcdb8 Merge commit 'v2.6.30-rc3' into tracing/hw-branch-tracing
Conflicts:
	arch/x86/kernel/ptrace.c

Merge reason: fix the conflict above, and also pick up the CONFIG_BROKEN
              dependency change from upstream so that we can remove it
	      here.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-24 10:11:23 +02:00
Len Brown
d2c8604121 x86, hpet: Stop soliciting hpet=force users on ICH4M
The HPET in the ICH4M is not documented in the data sheet
because it was not officially validated.

While it is fine for hackers to continue to use "hpet=force"
to enable the hardware that they have, it is not prudent to
solicit additional "hpet=force" users on this hardware.

[ Impact: remove hpet=force syslog message on old-ICH systems ]

Signed-off-by: Len Brown <len.brown@intel.com>
Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
LKML-Reference: <alpine.LFD.2.00.0904231918510.15843@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-24 08:41:39 +02:00
Len Brown
09041daeea Merge branch 'cpufreq' into release 2009-04-24 01:35:15 -04:00
Chris Wright
d7285c6b5c x86: use native register access for native tlb flushing
currently these are paravirtulaized, doesn't appear any callers rely on
this (no pv_ops backends are using native_tlb and overriding cr3/4
access).

[ Impact: fix lockdep warning with paravirt and function tracer ]

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
LKML-Reference: <20090423172138.GR3036@sequoia.sous-sol.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2009-04-23 23:05:03 -04:00
Yinghai Lu
4c31e92b97 x86: check boundary in setup_node_bootmem()
Commit dc09855 ("x86/uv: fix init of memory-less nodes") causes a
two sockets system (where node-1 doesn't have RAM installed) to crash.

That commit makes node_possible include cpu nodes that do not have memory.
So check boundary in setup_node_bootmem().

[ Impact: fix boot crash on RAM-less NUMA node system ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Jack Steiner <steiner@sgi.com>
LKML-Reference: <49EF89DF.9090404@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-23 09:58:56 +02:00
Yinghai Lu
b10ceb5530 x86/PCI: don't bother with root quirks if _CRS is used
It will be overwriten later if _CRS is used, so don't bother to set it.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-22 15:06:29 -07:00
Yinghai Lu
0e94ecd098 x86/PCI: set_pci_bus_resources_arch_default cleanups
Rename set_pci_bus_resources_arch_default to x86_pci_root_bus_res_quirks, move
the weak version from common.c to i386.c, and before calling, make sure it's a
root bus.

Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-22 14:47:46 -07:00
Matthew Wilcox
0bb1be3e30 x86/PCI: Move set_pci_bus_resources_arch_default into arch/x86
Commit 30a18d6c3f introduced a new
function to set the PCI bus resources.  Unfortunately, neither the
author, nor the committers seemed to know that we already have somewhere
to do that -- pcibios_fixup_bus().  This patch moves the hook (used only
by the K8 code) into x86-specific code where it should have been in the
first place.

Cc: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-22 13:57:36 -07:00
Yinghai Lu
044cd80942 x86/PCI: don't call e820_all_mapped with -1 in the mmconfig case
e820_all_mapped need end is (addr + size) instead of (addr + size - 1)

Cc: stable@kernel.org
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-22 13:56:26 -07:00
Andi Kleen
5679af4c16 x86, mce: fix boot logging logic
The earlier patch to change the poller to a separate function subtly
broke the boot logging logic. This could lead to machine checks
getting logged at boot even when disabled or defaulting to off
on some systems. Fix that.

[ Impact: bug fix - avoid spurious MCE in log ]

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2009-04-22 13:56:25 -07:00
Andi Kleen
6298c512bc x86, mce: make polling timer interval per CPU
The polling timer while running per CPU still uses a global next_interval
variable, which lead to some CPUs either polling too fast or too slow.   
This was not a serious problem because all errors get picked up eventually,
but it's still better to avoid it. Turn next_interval into a per cpu variable.

v2: Fix check_interval == 0 case (Hidetoshi Seto)

[ Impact: minor bug fix ]

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2009-04-22 13:54:37 -07:00
Coly Li
c5428e950a uv_time: add parameter to uv_read_rtc()
uv_read_rtc() is referenced by read member of struct clocksource clocksource_uv.
In include/linux/clocksource.h, read of struct clocksource is declared as:
cycle_t (*read)(struct clocksource *cs)

This got introduced recently in:

   8e19608: clocksource: pass clocksource to read() callback

But arch/x86/kernel/uv_time.c was not properly converted by that pach.

This patch adds a dummy parameter (struct clocksource type) to uv_read_rtc() to
fix the incompatible reference in clocksource_uv, and add a NULL parameter in
all places where uv_read_rtc() gets called.

[ Impact: cleanup, address compiler warning ]

Signed-off-by: Coly Li <coly.li@suse.de>
Cc: Dimitri Sivanich <sivanich@sgi.com>
Cc: Magnus Damm <damm@igel.co.jp>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Hugh Dickins <hugh@veritas.com>
LKML-Reference: <49EF3614.1050806@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Dimitri Sivanich <sivanich@sgi.com>
2009-04-22 17:41:25 +02:00
Andreas Herrmann
7a6f9cbb37 x86: hpet: fix periodic mode programming on AMD 81xx
(See http://bugzilla.kernel.org/show_bug.cgi?id=12961)

It partially reverts commit c23e253e67
(x86: hpet: stop HPET_COUNTER when programming periodic mode)

HPET on AMD 81xx chipset needs a second write (with HPET_TN_SETVAL
cleared) to T0_CMP register to set the period in periodic mode.

With this patch HPET_COUNTER is still stopped but not reset when HPET
is programmed in periodic mode. This should help to avoid races when
HPET is programmed in periodic mode and fixes a boot time hang that
I've observed on a machine when using 1000HZ.

[ Impact: fix boot time hang on machines with AMD 81xx chipset ]

Reported-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Tested-by: Jeff Mahoney <jeffm@suse.com>
LKML-Reference: <20090421180037.GA2763@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-22 15:53:40 +02:00
Jan Kiszka
888d256e9c KVM: Unregister cpufreq notifier on unload
Properly unregister cpufreq notifier on onload if it was registered
during init.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2009-04-22 13:54:33 +03:00
Joerg Roedel
7f1ea20896 KVM: x86: release time_page on vcpu destruction
Not releasing the time_page causes a leak of that page or the compound
page it is situated in.

Cc: stable@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2009-04-22 13:52:10 +03:00
Marcelo Tosatti
bf47a760f6 KVM: MMU: disable global page optimization
Complexity to fix it not worthwhile the gains, as discussed
in http://article.gmane.org/gmane.comp.emulators.kvm.devel/28649.

Cc: stable@kernel.org
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2009-04-22 13:52:09 +03:00
Ingo Molnar
3568b71d46 Merge commit 'v2.6.30-rc3' into x86/urgent
Merge reason: hpet.c changed upstream, make sure we test against that

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-22 12:44:20 +02:00
Suresh Siddha
ff166cb57a x86: x2apic, IR: remove reinit_intr_remapped_IO_APIC()
When interrupt-remapping is enabled, we are relying on
setup_IO_APIC_irqs() to configure remapped entries in the
IO-APIC, which comes little bit later after enabling
interrupt-remapping.

Meanwhile, restoration of old io-apic entries after enabling
interrupt-remapping will not make the interrupts through
io-apic functional anyway.

So remove the unnecessary reinit_intr_remapped_IO_APIC() step.

The longer story:

When interrupt-remapping is enabled, IO-APIC entries need to be
setup in the re-mappable format (pointing to
interrupt-remapping table entries setup by the OS). This
remapping configuration is happening in the same place where we
traditionally configure IO-APIC (i.e., in
setup_IO_APIC_irqs()).

So when we enable interrupt-remapping successfully, there is no
need to restore old io-apic RTE entries before we actually do a
complete configuration shortly in setup_IO_APIC_irqs(). Old
IO-APIC RTE's may be in traditional format (non re-mappable) or
in re-mappable format pointing to interrupt-remapping table
entries setup by BIOS. Restoring both of these will not make
IO-APIC functional. We have to rely on setup_IO_APIC_irqs() for
proper configuration by OS.

So I am removing this unnecessary and broken step.

[ Impact: remove unnecessary/broken IO-APIC setup step ]

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Weidong Han <weidong.han@intel.com>
Cc: dwmw2@infradead.org
LKML-Reference: <20090420200450.552359000@linux-os.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-22 12:03:04 +02:00
David Howells
9b8de7479d FRV: Fix the section attribute on UP DECLARE_PER_CPU()
In non-SMP mode, the variable section attribute specified by DECLARE_PER_CPU()
does not agree with that specified by DEFINE_PER_CPU().  This means that
architectures that have a small data section references relative to a base
register may throw up linkage errors due to too great a displacement between
where the base register points and the per-CPU variable.

On FRV, the .h declaration says that the variable is in the .sdata section, but
the .c definition says it's actually in the .data section.  The linker throws
up the following errors:

kernel/built-in.o: In function `release_task':
kernel/exit.c:78: relocation truncated to fit: R_FRV_GPREL12 against symbol `per_cpu__process_counts' defined in .data section in kernel/built-in.o
kernel/exit.c:78: relocation truncated to fit: R_FRV_GPREL12 against symbol `per_cpu__process_counts' defined in .data section in kernel/built-in.o

To fix this, DECLARE_PER_CPU() should simply apply the same section attribute
as does DEFINE_PER_CPU().  However, this is made slightly more complex by
virtue of the fact that there are several variants on DEFINE, so these need to
be matched by variants on DECLARE.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-21 19:39:59 -07:00
Michael K. Johnson
2a3313f494 x86: more than 8 32-bit CPUs requires X86_BIGSMP
$ cat x86-more-than-8-cpus-requires-bigsmp.patch

Enforce NR_CPUS <= 8 limitation if X86_BIGSMP not set

Configuring more than 8 logical CPUs on 32-bit x86 requires
X86_BIGSMP to be set in order to boot successfully, if more than 8
logical CPUs are actually found at boot time.  The X86_BIGSMP help
text describes that it is required to be set if more than 8 CPUs
are configured, but this was previously not enforced.

This configuration error has affected multiple distributions:
    https://bugzilla.redhat.com/show_bug.cgi?id=480844
    https://issues.rpath.com/browse/RPL-3022

Signed-off-by: Michael K Johnson <johnsonm@rpath.com>
LKML-Reference: <20090422014448.GB32541@logo.rdu.rpath.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-04-21 19:34:54 -07:00
Magnus Damm
8e19608e8b clocksource: pass clocksource to read() callback
Pass clocksource pointer to the read() callback for clocksources.  This
allows us to share the callback between multiple instances.

[hugh@veritas.com: fix powerpc build of clocksource pass clocksource mods]
[akpm@linux-foundation.org: cleanup]
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Acked-by: John Stultz <johnstul@us.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-21 13:41:47 -07:00
Pekka Enberg
89388913f2 x86: unify noexec handling
This patch unifies noexec handling on 32-bit and 64-bit.

[ Impact: cleanup ]

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
[ mingo@elte.hu: build fix ]
LKML-Reference: <1240303167.771.69.camel@penberg-laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-21 10:48:08 +02:00
Ingo Molnar
8ecee4620e Merge branch 'linus' into x86/mm
Merge reason: refresh the topic: there's been 290 non-merges commits upstream
              to arch/x86 alone.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-21 10:46:54 +02:00
Rusty Russell
fcc5c4a2fe x86: avoid theoretical spurious NMI backtraces with CONFIG_CPUMASK_OFFSTACK=y
In theory (though not shown in practice) alloc_cpumask_var() doesn't zero
memory, so CPUs might print an "NMI backtrace for cpu %d" once on boot.

(Bug introduced in fcef8576d8).

[ Impact: avoid theoretical syslog noise in rare configs ]

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <alpine.DEB.2.00.0904202113520.10097@gandalf.stny.rr.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-21 10:09:50 +02:00
Rusty Russell
2f537a9f8e x86: fix boot crash in NMI watchdog with CONFIG_CPUMASK_OFFSTACK=y and flat APIC
fcef8576d8 converted backtrace_mask to a
cpumask_var_t, and assumed check_nmi_watchdog was called before
nmi_watchdog_tick was ever called.  Steven's oops shows I was wrong.

This is something of a bandaid: I'm not sure we *should* be calling
nmi_watchdog_tick before check_nmi_watchdog.  Note that gcc eliminates
this test for the CONFIG_CPUMASK_OFFSTACK=n case.

[ Impact: fix boot crash in rare configs ]

Reported-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <alpine.DEB.2.00.0904202113520.10097@gandalf.stny.rr.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-21 10:09:49 +02:00
Suresh Siddha
9d6c26e73b x86: x2apic, IR: Make config X86_UV dependent on X86_X2APIC
Instead of selecting X86_X2APIC, make config X86_UV dependent
on X86_X2APIC.

This will eliminate enabling CONFIG_X86_X2APIC with out
enabling CONFIG_INTR_REMAP.

[ Impact: cleanup ]

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Jack Steiner <steiner@sgi.com>
Cc: dwmw2@infradead.org
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Weidong Han <weidong.han@intel.com>
LKML-Reference: <20090420200450.694598000@linux-os.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-21 09:08:27 +02:00
Suresh Siddha
39d83a5d68 x86: x2apic, IR: Clean up panic() with nox2apic boot option
Instead of panic() ignore the "nox2apic" boot option when BIOS
has already enabled x2apic prior to OS handover.

[ Impact: printk warning instead of panic() when BIOS has enabled x2apic already ]

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: dwmw2@infradead.org
Cc: Weidong Han <weidong.han@intel.com>
LKML-Reference: <20090420200450.425091000@linux-os.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-21 09:08:26 +02:00
Suresh Siddha
25629d810a x86: x2apic, IR: Move eoi_ioapic_irq() into a CONFIG_INTR_REMAP section
Address the following complier warning:

   arch/x86/kernel/apic/io_apic.c:2543: warning: `eoi_ioapic_irq' defined but not used

By moving that function (and eoi_ioapic_irq()) into an existing
#ifdef CONFIG_INTR_REMAP section of the code.

[ Impact: cleanup ]

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: dwmw2@infradead.org
Cc: Weidong Han <weidong.han@intel.com>
LKML-Reference: <20090420200450.271099000@linux-os.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Weidong Han <weidong.han@intel.com>
2009-04-21 09:08:26 +02:00
Suresh Siddha
fc1edaf9e7 x86: x2apic, IR: Clean up X86_X2APIC and INTR_REMAP config checks
Add x2apic_supported() to clean up CONFIG_X86_X2APIC checks.

Fix CONFIG_INTR_REMAP checks.

[ Impact: cleanup ]

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: dwmw2@infradead.org
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Weidong Han <weidong.han@intel.com>
LKML-Reference: <20090420200450.128993000@linux-os.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-21 09:08:25 +02:00
Oleg Drokin
0112fc2229 Separate out common fstatat code into vfs_fstatat
This is a version incorporating Christoph's suggestion.

Separate out common *fstatat functionality into a single function
instead of duplicating it all over the code.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-04-20 23:02:51 -04:00
Suresh Siddha
06c38d5e36 x86-64: fix FPU corruption with signals and preemption
In 64bit signal delivery path, clear_used_math() was happening before saving
the current active FPU state on to the user stack for signal handling. Between
clear_used_math() and the state store on to the user stack, potentially we
can get a page fault for the user address and can block. Infact, while testing
we were hitting the might_fault() in __clear_user() which can do a schedule().

At a later point in time, we will schedule back into this process and
resume the save state (using "xsave/fxsave" instruction) which can lead
to DNA fault. And as used_math was cleared before, we will reinit the FP state
in the DNA fault and continue. This reinit will result in loosing the
FPU state of the process.

Move clear_used_math() to a point after the FPU state has been stored
onto the user stack.

This issue is present from a long time (even before the xsave changes
and the x86 merge). But it can easily be exposed in 2.6.28.x and 2.6.29.x
series because of the __clear_user() in this path, which has an explicit
__cond_resched() leading to a context switch with CONFIG_PREEMPT_VOLUNTARY.

[ Impact: fix FPU state corruption ]

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: <stable@kernel.org>			[2.6.28.x, 2.6.29.x]
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2009-04-20 14:33:00 -07:00
Jack Steiner
fc61e6636d x86/uv: fix for no memory at paddr 0
Fix endcase where the memory at physical address 0 does not really
exist AND one of the sockets on blade 0 has no active cpus.

The memory that _appears_ to be at physical address 0 is actually
memory that located at a different address but has been remapped by
the chipset so that it appears to be at physical address 0.

When determining the UV pnode, the algorithm for determining the pnode
incorrectly used the relocated physical address instead of the actual
(global) address.

[ Impact: boot failure on partitioned systems ]

Signed-off-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20090420132530.GA23156@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-20 18:09:18 +02:00
Ingo Molnar
62d1702909 Merge branch 'linus' into x86/urgent
Merge reason: We need the x86/uv updates from upstream, to queue up
              dependent fix.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-20 18:08:12 +02:00
Thomas Renninger
d876dfbbf5 acpi-cpufreq: Do not let get_measured perf depend on internal variable
Take already available policy->cpuinfo.max_freq and get rid of acpi-cpufreq
specific max_freq variable.

This implies that P0 is always the highest frequency which should always
be true as ACPI spec says:
As a result, the zeroth entry describes the highest performance state

Signed-off-by: Thomas Renninger <trenn@suse.de>
Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-04-19 22:47:21 -04:00
Thomas Renninger
d91758f5dd acpi-cpufreq: style-only: add parens to math expression
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-04-19 22:47:21 -04:00
Thomas Renninger
e0e8c4e512 acpi-cpufreq: Cleanup: Use printk_once
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-04-19 22:47:20 -04:00
Pallipadi, Venkatesh
093f13e231 x86, acpi_cpufreq: Fix the NULL pointer dereference in get_measured_perf
Fix for a regression that was introduced by earlier commit
18b2646fe3 on Mon Apr 6 11:26:08 2009

Regression resulted in the below error happened on systems with
software coordination where per_cpu acpi data will not be initiated for
secondary CPUs in a P-state domain.

On Tue, 2009-04-14 at 23:01 -0700, Zhang, Yanmin wrote:
 My machine hanged with kernel 2.6.30-rc2 when script read
> /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor.
>
> opps happens in get_measured_perf:
>
>         cur.aperf.whole = readin.aperf.whole -
>                                 per_cpu(drv_data, cpu)->saved_aperf;
>
> Because per_cpu(drv_data, cpu)=NULL.
>
> So function get_measured_perf should check if (per_cpu(drv_data,
> cpu)==NULL)
> and return 0 if it's NULL.

--------------sys log------------------

BUG: unable to handle kernel NULL pointer dereference at
0000000000000020
IP: [<ffffffff8021af75>] get_measured_perf+0x4a/0xf9
PGD a7dd88067 PUD a7ccf5067 PMD 0
Oops: 0000 [] SMP
last sysfs file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
CPU 0
Modules linked in: video output
Pid: 2091, comm: kondemand/0 Not tainted 2.6.30-rc2  MP Server
RIP: 0010:[<ffffffff8021af75>]  [<ffffffff8021af75>]
get_measured_perf+0x4a/0xf9
RSP: 0018:ffff880a7d56de20  EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00000046241a42b6 RCX: ffff88004d219000
RDX: 000000000000b660 RSI: 0000000000000020 RDI: 0000000000000001
RBP: ffff880a7f052000 R08: 00000046241a42b6 R09: ffffffff807639f0
R10: 00000000ffffffea R11: ffffffff802207f4 R12: ffff880a7f052000
R13: ffff88004d20e460 R14: 0000000000ddd5a6 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88004d200000(0000)
knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 0000000000000020 CR3: 0000000a7f1bf000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process kondemand/0 (pid: 2091, threadinfo ffff880a7d56c000, task
ffff880a7d4d18c0)
Stack:
 ffff880a7f052078 ffffffff803efd54 00000046241a42b6 000000462ffa9e95
 0000000000000001 0000000000000001 00000000ffffffea ffffffff8064f41a
 0000000000000012 0000000000000012 ffff880a7f052000 ffffffff80650547
Call Trace:
 [<ffffffff803efd54>] ? kobject_get+0x12/0x17
 [<ffffffff8064f41a>] ? __cpufreq_driver_getavg+0x42/0x57
 [<ffffffff80650547>] ? do_dbs_timer+0x147/0x272
 [<ffffffff80650400>] ? do_dbs_timer+0x0/0x272
 [<ffffffff802474ca>] ? worker_thread+0x15b/0x1f5
 [<ffffffff8024a02c>] ? autoremove_wake_function+0x0/0x2e
 [<ffffffff8024736f>] ? worker_thread+0x0/0x1f5
 [<ffffffff80249f0d>] ? kthread+0x54/0x83
 [<ffffffff8020c87a>] ? child_rip+0xa/0x20
 [<ffffffff80249eb9>] ? kthread+0x0/0x83
 [<ffffffff8020c870>] ? child_rip+0x0/0x20
Code: 99 a6 03 00 31 c9 85 c0 0f 85 c3 00 00 00 89 df 4c 8b 44 24 10 48
c7 c2 60 b6 00 00 48 8b 0c fd e0 30 a5 80 4c 89 c3 48 8b 04 0a <48> 2b
58 20 48 8b 44 24 18 48 89 1c 24 48 8b 34 0a 48 2b 46 28
RIP  [<ffffffff8021af75>] get_measured_perf+0x4a/0xf9
 RSP <ffff880a7d56de20>
CR2: 0000000000000020
---[ end trace 2b8fac9a49e19ad4 ]---

Tested-by: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-04-19 22:47:20 -04:00
Rusty Russell
a489f0b555 lguest: fix guest crash on non-linear addresses in gdt pvops
Fixes guest crash 'lguest: bad read address 0x4800000 len 256'

The new per-cpu allocator ends up handing a non-linear address to
write_gdt_entry.  We do __pa() on it, and hand it to the host, which
kills us.

I've long wanted to make the hypercall "LOAD_GDT_ENTRY" to match the IDT
code, but had no pressing reason until now.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: lguest@ozlabs.org
2009-04-19 23:14:01 +09:30
Cyrill Gorcunov
667c5296cc x86: es7000, uv - use __cpuinit for kicking secondary cpus
The caller already has __cpuinit attribute.

[ Impact: save memory, address section mismatch warning ]

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
LKML-Reference: <20090419074311.GA8670@lenovo>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-19 10:28:53 +02:00
Cyrill Gorcunov
cece3155d8 x86: smpboot - wakeup_secondary should be done via __cpuinit section
A caller (do_boot_cpu) already has __cpuinit attribute.

Since HOTPLUG_CPU depends on SMP && HOTPLUG it doesn't
lead to panic at moment.

[ Impact: cleanup ]

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
LKML-Reference: <20090418194528.GD25510@lenovo>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-19 10:22:14 +02:00
Weidong Han
9a2755c356 x86, intr-remap: fix x2apic/intr-remap resume
Interrupt remapping was decoupled from x2apic. Shouldn't check
x2apic before resume interrupt remapping. Otherwise, interrupt
remapping won't be resumed when x2apic is not enabled.

[ Impact: fix potential intr-remap resume hang on !x2apic ]

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Weidong Han <weidong.han@intel.com>
Acked-by: David Woodhouse <David.Woodhouse@intel.com>
Cc: iommu@lists.linux-foundation.org
Cc: allen.m.kay@intel.com
Cc: fenghua.yu@intel.com
LKML-Reference: <1239957736-6161-6-git-send-email-weidong.han@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-19 10:22:05 +02:00
Weidong Han
937582382c x86, intr-remap: enable interrupt remapping early
Currently, when x2apic is not enabled, interrupt remapping
will be enabled in init_dmars(), where it is too late to remap
ioapic interrupts, that is, ioapic interrupts are really in
compatibility mode, not remappable mode.

This patch always enables interrupt remapping before ioapic
setup, it guarantees all interrupts will be remapped when
interrupt remapping is enabled. Thus it doesn't need to set
the compatibility interrupt bit.

[ Impact: refactor intr-remap init sequence, enable fuller remap mode ]

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Weidong Han <weidong.han@intel.com>
Acked-by: David Woodhouse <David.Woodhouse@intel.com>
Cc: iommu@lists.linux-foundation.org
Cc: allen.m.kay@intel.com
Cc: fenghua.yu@intel.com
LKML-Reference: <1239957736-6161-4-git-send-email-weidong.han@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-19 10:21:43 +02:00
Weidong Han
5d0ae2db6d x86, intr-remap: fix ack for interrupt remapping
Shouldn't call ack_apic_edge() in ir_ack_apic_edge(), because
ack_apic_edge() does more than just ack: it also does irq migration
in the non-interrupt-remapping case. But there is no such need for
interrupt-remapping case, as irq migration is done in the process
context.

Similarly, ir_ack_apic_level() shouldn't call ack_apic_level, and
instead should do the local cpu's EOI + directed EOI to the io-apic.

ack_x2APIC_irq() is not neccessary, because ack_APIC_irq() will use MSR
write for x2apic, and uncached write for non-x2apic.

[ Impact: simplify/standardize intr-remap IRQ acking, fix on !x2apic ]

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Weidong Han <weidong.han@intel.com>
Acked-by: David Woodhouse <David.Woodhouse@intel.com>
Cc: iommu@lists.linux-foundation.org
Cc: allen.m.kay@intel.com
Cc: fenghua.yu@intel.com
LKML-Reference: <1239957736-6161-3-git-send-email-weidong.han@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-19 10:21:33 +02:00
Steven Rostedt
0300e7f1a5 lockdep, x86: account for irqs enabled in paranoid_exit
I hit the check_flags error of lockdep:

 WARNING: at kernel/lockdep.c:2893 check_flags+0x1a7/0x1d0()
 [...]
 hardirqs last  enabled at (12567): [<ffffffff8026206a>] local_bh_enable+0xaa/0x110
 hardirqs last disabled at (12569): [<ffffffff80610c76>] int3+0x16/0x40
 softirqs last  enabled at (12566): [<ffffffff80514d2b>] lock_sock_nested+0xfb/0x110
 softirqs last disabled at (12568): [<ffffffff8058454e>] tcp_prequeue_process+0x2e/0xa0

The check_flags warning of lockdep tells me that lockdep thought interrupts
were disabled, but they were really enabled.

The numbers in the above parenthesis show the order of events:

 12566: softirqs last enabled:  lock_sock_nested
 12567: hardirqs last enabled:  local_bh_enable
 12568: softirqs last disabled: tcp_prequeue_process
 12566: hardirqs last disabled: int3

int3 is a breakpoint!

Examining this further, I have CONFIG_NET_TCPPROBE enabled which adds
break points into the kernel.

The paranoid_exit of the return of int3 does not account for enabling
interrupts on return to kernel. This code is a bit tricky since it
is also used by the nmi handler (when lockdep is off), and we must be
careful about the swapgs. We can not call kernel code after the swapgs
has been performed.

[ Impact: fix lockdep check_flags warning + self-turn-off ]

Acked-by: Peter Zijlsta <a.p.zijlstra@chello.nl>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-18 09:04:28 +02:00
Jaswinder Singh Rajput
a81b6314e0 x86: mm/numa_32.c calculate_numa_remap_pages should use __init
calculate_numa_remap_pages() is called only by __init initmem_init()
further calculate_numa_remap_pages is calling:
	__init find_e820_area() and __init reserve_early()

So calculate_numa_remap_pages() should be __init calculate_numa_remap_pages().

 WARNING: arch/x86/built-in.o(.text+0x82ea3): Section mismatch in reference from the function calculate_numa_remap_pages() to the function .init.text:find_e820_area()
 The function calculate_numa_remap_pages() references
 the function __init find_e820_area().
 This is often because calculate_numa_remap_pages lacks a __init
 annotation or the annotation of find_e820_area is wrong.

 WARNING: arch/x86/built-in.o(.text+0x82f5f): Section mismatch in reference from the function calculate_numa_remap_pages() to the function .init.text:reserve_early()
 The function calculate_numa_remap_pages() references
 the function __init reserve_early().
 This is often because calculate_numa_remap_pages lacks a __init
 annotation or the annotation of reserve_early is wrong.

[ Impact: save memory, address Section mismatch warning ]

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
LKML-Reference: <1239991281.3153.4.camel@ht.satnam>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-17 22:43:13 +02:00
H. Peter Anvin
1648e4f805 x86, kbuild: make "make install" not depend on vmlinux
It is common to use "make install" in restricted environments which
differ from the one which was actually used to build the kernel.  In
such environments it is highly undesirable to trigger a rebuild of any
part of the system.  Worse, the rebuild may be spurious, triggered by
differences in the environment.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
LKML-Reference: <20090415234642.GA28531@uranus.ravnborg.org>
2009-04-17 22:43:12 +02:00
Jack Steiner
27229ca632 x86/uv: fix init of cpu-less nodes
Fix an endcase in the UV initialization code for the "UV large system mode"
of apicids.  If node zero contains no cpus, cpus on another node will be the
boot cpu.  The percpu data that contains the extra apicid bits was not
being initialized early enough.

[ Impact: fix potential boot crash on cpu-less UV nodes ]

Signed-off-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20090417142447.GA23759@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-17 22:43:11 +02:00
Jack Steiner
dc09855191 x86/uv: fix init of memory-less nodes
Add support for nodes that have cpus but no memory.
The current code was failing to add these nodes
to the nodes_present_map.

v2: Fixes case caught by David Rientjes - missed support
    for the x2apic SRAT table.

[ Impact: fix potential boot crash on memory-less UV nodes. ]

Reported-by: David Rientjes <rientjes@google.com>
Signed-off-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20090417142242.GA23743@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-17 22:42:12 +02:00
Linus Torvalds
b9836e0837 Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: fix microcode driver newly spewing warnings
  x86, PAT: Remove page granularity tracking for vm_insert_pfn maps
  x86: disable X86_PTRACE_BTS for now
  x86, documentation: kernel-parameters replace X86-32,X86-64 with X86
  x86: pci-swiotlb.c swiotlb_dma_ops should be static
  x86, PAT: Remove duplicate memtype reserve in devmem mmap
  x86, PAT: Consolidate code in pat_x_mtrr_type() and reserve_memtype()
  x86, PAT: Changing memtype to WC ensuring no WB alias
  x86, PAT: Handle faults cleanly in set_memory_ APIs
  x86, PAT: Change order of cpa and free in set_memory_wb
  x86, CPA: Change idmap attribute before ioremap attribute setup
2009-04-17 09:56:11 -07:00
Andreas Herrmann
9b94b3a19b x86: fixup numa_node information for AMD CPU northbridge functions
Currently the numa_node attribute for these PCI devices is 0 (it
corresponds to the numa_node for PCI bus 0). This is not a big issue
but incorrect.

This inconsistency can be fixed by reading the node number from CPU
NB function 0.

[ Impact: fill in dev->numa_node information, to optimize DMA allocations ]

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: jbarnes@virtuousgeek.org
LKML-Reference: <20090417100746.GG16198@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-17 18:12:36 +02:00
Ingo Molnar
5043124e66 Merge branch 'linus' into x86/apic
Merge reason: new intr-remap patches depend on the s2ram iommu fixes from upstream

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-17 16:18:28 +02:00
Yinghai Lu
ca713c2ab0 x86/irq: mark NUMA_MIGRATE_IRQ_DESC broken
It causes crash on system with lots of cards with MSI-X
when irq_balancer enabled...

The patches fixing it were both complex and fragile, according
to Eric they were also doing quite dangerous things to the
hardware.

Instead we now have patches that solve this problem via static
NUMA node mappings - not dynamic allocation and balancing.

The patches are much simpler than this method but are still too
large outside of the merge window, so we mark the dynamic balancer
as broken for now, and queue up the new approach for v2.6.31.

[ Impact: deactivate broken kernel feature ]

Reported-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <49E68C41.4020801@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-17 03:20:01 +02:00
Linus Torvalds
20d9207849 Merge branch 'x86/uv' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86/uv' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: UV BAU distribution and payload MMRs
  x86: UV: BAU partition-relative distribution map
  x86, uv: add Kconfig dependency on NUMA for UV systems
  x86: prevent /sys/firmware/sgi_uv from being created on non-uv systems
  x86, UV: Fix for nodes with memory and no cpus
  x86, UV: system table in bios accessed after unmap
  x86: UV BAU messaging timeouts
  x86: UV BAU and nodes with no memory
2009-04-16 16:43:20 -07:00
Dmitry Adamushko
0917798d82 x86: fix microcode driver newly spewing warnings
Jeff Garzik reported this WARN_ON() noise:

> Kernel: 2.6.30-rc1-00306-g8371f87
> Hardware: ICH10 x86-64
>
> This is a regression from 2.6.29.  Microcode spews the following WARNING
> multiple times during boot:
>
> ------------[ cut here ]------------
> WARNING: at fs/sysfs/group.c:138 sysfs_remove_group+0xeb/0xf0()
> Hardware name:         sysfs group ffffffffa0209700 not found for
>  kobject 'cpu0'

Keep sysfs files around for cpus even when we failed to locate
microcode for them at the moment of module loading. The appropriate
microcode firmware can become available later on.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-17 01:11:20 +02:00
Pallipadi, Venkatesh
4b06504627 x86, PAT: Remove page granularity tracking for vm_insert_pfn maps
This change resolves the problem of too many single page entries
in pat_memtype_list and "freeing invalid memtype" errors with i915,
reported here:

  http://marc.info/?l=linux-kernel&m=123845244713183&w=2

Remove page level granularity track and untrack of vm_insert_pfn.
memtype tracking at page granularity does not scale and cleaner
approach would be for the driver to request a type for a bigger
IO address range or PCI io memory range for that device, either at
mmap time or driver init time and just use that type during
vm_insert_pfn.

This patch just removes the track/untrack of vm_insert_pfn. That
means we will be in same state as 2.6.28, with respect to these APIs.

Newer APIs for the drivers to request a memtype for a bigger region
is coming soon.

[ Impact: fix Xorg startup warnings and hangs ]

Reported-by: Arkadiusz Miskiewicz <a.miskiewicz@gmail.com>
Tested-by: Arkadiusz Miskiewicz <a.miskiewicz@gmail.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
LKML-Reference: <20090408223716.GC3493@linux-os.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-17 00:44:22 +02:00
Cliff Wickman
4ea3c51d5b x86: UV BAU distribution and payload MMRs
This patch correctly sets BAU memory mapped registers to point
to the sending activation descriptor table and target payload table.

The "Broadcast Assist Unit" is used for TLB shootdown in UV.

The memory mapped registers that point to sending and receiving
memory structures contain node numbers.

In one case the __pa() function did not provide the node id of
memory on blade zero in configurations where that id is nonzero.
In another case, it was assumed that memory was allocated on
the local node.  That assumption is not true in a configuration
in which the node has no memory.

Tested on the UV hardware simulator.

[ Impact: fix possible runtime crash due to incorrect TLB logic ]

Signed-off-by: Cliff Wickman <cpw@sgi.com>
LKML-Reference: <E1LuR5Z-0007An-B8@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-16 19:44:16 +02:00
Sam Ravnborg
d1f0ae5e2e x86: standardize Kbuild rules
Introducing this Kbuild file allow us to:

    make arch/x86/

And thus building all the core part of x86.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Jaswinder Singh Rajput <jaswinder@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-16 18:09:02 +02:00
Ingo Molnar
d45b41ae8d x86: disable X86_PTRACE_BTS for now
Oleg Nesterov found a couple of races in the ptrace-bts code
and fixes are queued up for it but they did not get ready in time
for the merge window. We'll merge them in v2.6.31 - until then
mark the feature as CONFIG_BROKEN. There's no user-space yet
making use of this so it's not a big issue.

Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-15 23:15:14 +02:00
Yinghai Lu
77857dc072 x86: use used_vectors in init_IRQ()
Impact: fix crash with many devices

I found this crash:

[  552.616646] general protection fault: 0403 [] SMP
[  552.620013] last sysfs file:
/sys/devices/pci0000:00/0000:00:02.0/usb1/1-1/1-1:1.0/host13/target13:0:0/13:0:0:0/block/sr0/size
[  552.620013] CPU 0
[  552.620013] Modules linked in:
[  552.620013] Pid: 0, comm: swapper Not tainted 2.6.30-rc1-tip-01931-g8fcafd8-dirty  Sun Fire X4440
[  552.620013] RIP: 0010:[<ffffffff8023bada>]  [<ffffffff8023bada>] default_idle+0x7d/0xda
[  552.620013] RSP: 0018:ffffffff81345e68  EFLAGS: 00010246
[  552.620013] RAX: 0000000000000000 RBX: ffffffff8133d870 RCX: ffffc20000000000
[  552.620013] RDX: 00000000001d0620 RSI: ffffffff8023bad8 RDI: ffffffff802a3169
[  552.620013] RBP: ffffffff81345e98 R08: 0000000000000000 R09: ffffffff812244a0
[  552.620013] R10: ffffffff81345dc8 R11: 7ebe1b6fa0bcac50 R12: 4ec4ec4ec4ec4ec5
[  552.620013] R13: ffffffff813a54d0 R14: ffffffff813a7a40 R15: 0000000000000000
[  552.620013] FS:  00000000006d1880(0000) GS:ffffc20000000000(0000) knlGS:0000000000000000
[  552.620013] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
[  552.620013] CR2: 00007fec9d936a50 CR3: 000000007d1a9000 CR4: 00000000000006e0
[  552.620013] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  552.620013] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[  552.620013] Process swapper (pid: 0, threadinfo ffffffff81344000,task ffffffff812244a0)
[  552.620013] Stack:
[  552.620013]  0000000000000000 ffffc20000000000 00000000001d0620 7ebe1b6fa0bcac50
[  552.620013]  ffffffff8133d870 4ec4ec4ec4ec4ec5 ffffffff81345ec8 ffffffff8023bd84
[  552.620013]  4ec4ec4ec4ec4ec5 ffffffff813a54d0 7ebe1b6fa0bcac50 ffffffff8133d870
[  552.620013] Call Trace:
[  552.620013]  [<ffffffff8023bd84>] c1e_idle+0x109/0x124
[  552.620013]  [<ffffffff8023314b>] cpu_idle+0xb8/0x101
[  552.620013]  [<ffffffff80c16d6a>] rest_init+0x7e/0x94
[  552.620013]  [<ffffffff81357efc>] start_kernel+0x3dc/0x3fd
[  552.620013]  [<ffffffff813572a9>] x86_64_start_reservations+0xb9/0xd4
[  552.620013]  [<ffffffff813573b2>] x86_64_start_kernel+0xee/0x109
[  552.620013] Code: 48 8b 04 25 f8 b4 00 00 83 a0 3c e0 ff ff fb 0f ae f0 65 48 8b 04 25 f8 b4 00 00 f6 80 38 e0 ff ff 08 75 09 e8 71 76 06 00 fb f4 <eb> 06 e8 68 76 06 00 fb 65 48 8b 04 25 f8 b4 00 00 83 88 3c e0
[  552.620013] RIP  [<ffffffff8023bada>] default_idle+0x7d/0xda
[  552.620013]  RSP <ffffffff81345e68>
[  552.828646] ---[ end trace 4cbfc5c01382af7f ]---

Joerg Roedel said
	"The 0403 error code means that there was an external interrupt with vector
	0x80. Yinghai, my theory is that the kernel on this machine has no 32bit
	emulation compiled in, right? In this case the selector points to a zero entry
	which may cause the #gpf right after the hlt.
	But I have no idea where the external int 0x80 comes from"

it turns out that we could use 0x80 for external device on 64-bit
when 32-bit emulation is disabled.

But we forgot to set the gate for it.

try to set gate for it by checking used_vectors.

Also move apic_intr_init() early to avoid setting
that gate two times.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Joerg Roedel <joerg.roedel@amd.com>
LKML-Reference: <49E62DFD.6010904@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-15 21:24:01 +02:00
Linus Torvalds
ea34f43a07 acpi-cpufreq: fix 'smp_call_function_many()' confusion
It turns out that 'smp_call_function_many()' doesn't work at all like
'smp_call_function_single()', and my change to Andrew's patch to use it
rather than a loop over all CPU's acpi-cpufreq doesn't work.

My bad.

'smp_call_function_many()' has two "features" (aka "documented bugs"):

 (a) it needs to be called with preemption disabled, because it uses
     smp_processor_id() without guarding the CPU lookup with 'get_cpu()'
     and 'put_cpu()' like the 'single' variant does.

 (b) even if the current CPU is part of the CPU mask, it won't do the
     call on that CPU.

Still, we're better off trying to use 'smp_call_function_many()' than
looping over CPU's, since it at least in theory allows us to use a
broadcast IPI and do it all in parallel.  So let's just work around the
silly semantic bugs in that function.

Reported-and-tested-by: Ali Gholami Rudi <ali@rudi.ir>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-15 08:41:16 -07:00
FUJITA Tomonori
19c1a6f576 x86 gart: reimplement IOMMU_LEAK feature by using DMA_API_DEBUG
IOMMU_LEAK, GART's own feature, dumps the used IOMMU entries when
IOMMU entries is full, which might be useful to find a bad driver that
eats IOMMU entries.

DMA_API_DEBUG provides the similar feature, debug_dma_dump_mappings,
and it's better than GART's IOMMU_LEAK feature. GART's IOMMU_LEAK
feature doesn't say who uses IOMMU entries so it's hard to find a bad
driver.

This patch reimplements the GART's IOMMU_LEAK feature by using
DMA_API_DEBUG.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <1239669799-23579-2-git-send-email-fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-15 12:22:47 +02:00
Jaswinder Singh Rajput
b206525ad1 x86: k8 convert node_to_k8_nb_misc() from a macro to an inline function
Converting node_to_k8_nb_misc() from a macro to an inline function
makes compiler see the 'node' parameter in the !CONFIG_K8_NB too,
which eliminates these compiler warnings:

  arch/x86/kernel/cpu/intel_cacheinfo.c: In function ‘show_cache_disable’:
  arch/x86/kernel/cpu/intel_cacheinfo.c:712: warning: unused variable ‘node’
  arch/x86/kernel/cpu/intel_cacheinfo.c: In function ‘store_cache_disable’:
  arch/x86/kernel/cpu/intel_cacheinfo.c:739: warning: unused variable ‘node’

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Mark Langsdorf <mark.langsdorf@amd.com>
LKML-Reference: <1239730477.2966.26.camel@ht.satnam>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-15 12:12:36 +02:00
Hugh Dickins
6f66cbc630 x86 microcode: revert some work_on_cpu
Revert part of af5c820a31 ("x86: cpumask:
use work_on_cpu in arch/x86/kernel/microcode_core.c")

That change is causing only one Intel CPU's microcode to be updated e.g.
microcode: CPU3 updated from revision 0x9 to 0x17, date = 2005-04-22
where before it announced that also for CPU0 and CPU1 and CPU2.

We cannot use work_on_cpu() in the CONFIG_MICROCODE_OLD_INTERFACE code,
because Intel's request_microcode_user() involves a copy_from_user() from
/sbin/microcode_ctl, which therefore needs to be on that CPU at the time.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-14 11:45:59 -07:00
Cliff Wickman
94ca8e4852 x86: UV: BAU partition-relative distribution map
This patch enables each partition's BAU distribution bit map
to be partition-relative.

The distribution bitmap had been constructed assuming 0 as the base
node number.  That construct would not have allowed a total system of
greater than 256 nodes.
It also corrects an error that occurred when the first blade's nasid
was not zero.  That nasid was stored as the base node.
The base node number gets added by hardware to the node numbers implied
in the distribution bitmap, resulting in invalid target nasids.

Tested on the UV hardware simulator.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
LKML-Reference: <E1Ltl0C-0004Ob-37@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-14 18:53:36 +02:00
Pallipadi, Venkatesh
6ec3cfeca0 x86, irq: Remove IRQ_DISABLED check in process context IRQ move
As discussed in the thread here:

  http://marc.info/?l=linux-kernel&m=123964468521142&w=2

Eric W. Biederman observed:

> It looks like some additional bugs have slipped in since last I looked.
>
> set_irq_affinity does this:
> ifdef CONFIG_GENERIC_PENDING_IRQ
>        if (desc->status & IRQ_MOVE_PCNTXT || desc->status & IRQ_DISABLED) {
>                cpumask_copy(desc->affinity, cpumask);
>                desc->chip->set_affinity(irq, cpumask);
>        } else {
>                desc->status |= IRQ_MOVE_PENDING;
>                cpumask_copy(desc->pending_mask, cpumask);
>        }
> #else
>
> That IRQ_DISABLED case is a software state and as such it has nothing to
> do with how safe it is to move an irq in process context.

[...]

>
> The only reason we migrate MSIs in interrupt context today is that there
> wasn't infrastructure for support migration both in interrupt context
> and outside of it.

Yes. The idea here was to force the MSI migration to happen in process
context. One of the patches in the series did

        disable_irq(dev->irq);
        irq_set_affinity(dev->irq, cpumask_of(dev->cpu));
        enable_irq(dev->irq);

with the above patch adding irq/manage code check for interrupt disabled
and moving the interrupt in process context.

IIRC, there was no IRQ_MOVE_PCNTXT when we were developing this HPET
code and we ended up having this ugly hack. IRQ_MOVE_PCNTXT was there
when we eventually submitted the patch upstream. But, looks like I did a
blind rebasing instead of using IRQ_MOVE_PCNTXT in hpet MSI code.

Below patch fixes this. i.e., revert commit 932775a4ab
and add PCNTXT to HPET MSI setup. Also removes copying of desc->affinity
in generic code as set_affinity routines are doing it internally.

Reported-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "Li Shaohua" <shaohua.li@intel.com>
Cc: Gary Hade <garyhade@us.ibm.com>
Cc: "lcm@us.ibm.com" <lcm@us.ibm.com>
Cc: suresh.b.siddha@intel.com
LKML-Reference: <20090413222058.GB8211@linux-os.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-14 15:21:13 +02:00
FUJITA Tomonori
7e05575c42 x86: calgary: remove IOMMU_DEBUG
CONFIG_IOMMU_DEBUG has depends on CONFIG_GART_IOMMU:

config IOMMU_DEBUG
	bool "Enable IOMMU debugging"
	depends on GART_IOMMU && DEBUG_KERNEL
	depends on X86_64

So it's not useful to have CONFIG_IOMMU_DEBUG in Calgary IOMMU code,
which does the extra checking of the bitmap space management.

And Calgary uses the iommu helper for the bitmap space management now
so it would be better to have the extra checking feature in the iommu
helper rather than Calgary code (if necessary).

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: Joerg Roedel <joerg.roedel@amd.com>
Cc: alexisb@us.ibm.com
LKML-Reference: <20090414120827G.fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-14 13:03:36 +02:00
Yinghai Lu
6424fb3866 x86: remove (null) in /sys kernel_page_tables
Impact: cleanup

%p prints out 0x000000000000000 as (null)
so use %lx instead.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <49E43282.1090607@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-14 11:50:22 +02:00
Jaswinder Singh Rajput
e7d43a74cb x86: avoid multiple declaration of kstack_depth_to_print
Impact: cleanup

asm/stacktrace.h is more appropriate so removing other 2 declarations.

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
LKML-Reference: <1239695308.3033.34.camel@ht.satnam>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-14 11:45:33 +02:00
Jaswinder Singh Rajput
66aa230e43 x86: page_types.h unification of declarations
Impact: unification of declarations, cleanup

Unification of declarations:
 moved init_memory_mapping, initmem_init and free_initmem from
page_XX_types.h to page_types.h

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <1239693869.3033.31.camel@ht.satnam>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-14 11:44:45 +02:00
Linus Torvalds
1c98aa7424 Fix quilt merge error in acpi-cpufreq.c
We ended up incorrectly using '&cur' instead of '&readin' in the
work_on_cpu() -> smp_call_function_single() transformation in commit
01599fca67 ("cpufreq: use
smp_call_function_[single|many]() in acpi-cpufreq.c").

Andrew explains:
 "OK, the acpi tree went and had conflicting changes merged into it after
  I'd written the patch and it appears that I incorrectly reverted part
  of 18b2646fe3 while fixing the resulting
  rejects.

  Switching it to `readin' looks correct."

Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-13 18:09:20 -07:00
Jaswinder Singh Rajput
ff6c6fed3a x86: pci-swiotlb.c swiotlb_dma_ops should be static
Impact: reduce kernel size a bit, address sparse warning

Addresses the problem pointed out by this sparse warning:

  arch/x86/kernel/pci-swiotlb.c:53:20: warning: symbol 'swiotlb_dma_ops' was not declared. Should it be static?

For x86: swiotlb_dma_ops can be static, because it's not used outside
of pci-swiotlb.c

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
LKML-Reference: <1239558861.3938.2.camel@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-14 02:51:04 +02:00
Linus Torvalds
2e1c63b7ed Merge branch 'for-rc1/xen/core' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen
* 'for-rc1/xen/core' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:
  xen: add FIX_TEXT_POKE to fixmap
  xen: honour VCPU availability on boot
  xen: clean up gate trap/interrupt constants
  xen: set _PAGE_NX in __supported_pte_mask before pagetable construction
  xen: resume interrupts before system devices.
  xen/mmu: weaken flush_tlb_other test
  xen/mmu: some early pagetable cleanups
  Xen: Add virt_to_pfn helper function
  x86-64: remove PGE from must-have feature list
  xen: mask XSAVE from cpuid
  NULL noise: arch/x86/xen/smp.c
  xen: remove xen_load_gdt debug
  xen: make xen_load_gdt simpler
  xen: clean up xen_load_gdt
  xen: split construction of p2m mfn tables from registration
  xen: separate p2m allocation from setting
  xen: disable preempt for leave_lazy_mmu
2009-04-13 15:30:20 -07:00
Ingo Molnar
b5c851a88a Merge branch 'linus' into tracing/core
Merge reason: merge latest tracing fixes to avoid conflicts in
              kernel/trace/trace_events_filter.c with upcoming change

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-14 00:02:22 +02:00
Alexander van Heukelum
5cda395f4a x86: fix function definitions after: x86: apic - introduce imcr_ helpers
The patch "introduce imcr_ helpers" introduced good comments, but
also a few new compile warnings. This fixes the function definitions
to have a 'void' return type.

Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
LKML-Reference: <20090413153924.GA20287@mailshack.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-13 22:57:44 +02:00
Linus Torvalds
b8256b45d1 Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: add linux kernel support for YMM state
  x86: fix wrong section of pat_disable & make it static
  x86: Fix section mismatches in mpparse
  x86: fix set_fixmap to use phys_addr_t
  x86: Document get_user_pages_fast()
  x86, intr-remap: fix eoi for interrupt remapping without x2apic
2009-04-13 11:32:09 -07:00
Andrew Morton
01599fca67 cpufreq: use smp_call_function_[single|many]() in acpi-cpufreq.c
Atttempting to rid us of the problematic work_on_cpu().  Just use
smp_call_fuction_single() here.

This repairs a 10% sysbench(oltp)+mysql regression which Mike reported,
due to

  commit 6b44003e5c
  Author: Andrew Morton <akpm@linux-foundation.org>
  Date:   Thu Apr 9 09:50:37 2009 -0600

      work_on_cpu(): rewrite it to create a kernel thread on demand

It seems that the kernel calls these acpi-cpufreq functions at a quite
high frequency.

Valdis Kletnieks also reports that this causes 70-90 forks per second on
his hardware.

Cc: Valdis.Kletnieks@vt.edu
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Zhao Yakui <yakui.zhao@intel.com>
Acked-by: Dave Jones <davej@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Mike Galbraith <efault@gmx.de>
Cc: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
[ Made it use smp_call_function_many() instead of looping over cpu's
  with smp_call_function_single()    - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-13 11:09:46 -07:00
Cyrill Gorcunov
b9b34f24b2 x86: smp.c - align smp_ops assignments
Impact: cleanup

It's a bit hard to parse by eyes without
them being aligned.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
LKML-Reference: <20090412165058.924175574@openvz.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-12 19:23:54 +02:00
Cyrill Gorcunov
08306ce61d x86: apic - introduce dummy apic operations
Impact: refactor, speed up and robustize code

In case if apic was disabled by kernel option
or by hardware limits we can use dummy operations
in apic->write to simplify the ack_APIC_irq() code.

At the lame time the patch fixes the missed EOI in
do_IRQ function (which has place if kernel is compiled
as X86-32 and interrupt without handler happens where
apic was not asked to be disabled via kernel option).

Note that native_apic_write_dummy() consists of
WARN_ON_ONCE to catch any buggy writes on enabled
APICs. Could be removed after some time of testing.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
LKML-Reference: <20090412165058.724788431@openvz.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-12 19:23:53 +02:00
Cyrill Gorcunov
c0eaa4536f x86: apic - introduce imcr_ helpers
Impact: cleanup

Distinguish port writting magic into helpers with comments.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
LKML-Reference: <20090412165058.535921550@openvz.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-12 19:23:53 +02:00
Cyrill Gorcunov
edea7148a8 x86: irq.c - tiny cleanup
Impact: cleanup, robustization

 1) guard ack_bad_irq with printk_ratelimit since there is no
    guarantee we will not be flooded one day

 2) use pr_emerg() helper

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
LKML-Reference: <20090412165058.277579847@openvz.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-12 19:23:52 +02:00
Jaswinder Singh Rajput
3fa89ca7ba x86: vdso/vma.c declare vdso_enabled and arch_setup_additional_pages before they get used
Impact: cleanup, address sparse warnings

Addresses the problem pointed out by these sparse warning:
  arch/x86/vdso/vma.c:19:28: warning: symbol 'vdso_enabled' was not declared. Should it be static?
  arch/x86/vdso/vma.c:101:5: warning: symbol 'arch_setup_additional_pages' was not declared. Should it be static?

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
LKML-Reference: <1239548845.4170.2.camel@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-12 18:35:02 +02:00
Jaswinder Singh Rajput
2c1b284e4f x86: clean up declarations and variables
Impact: cleanup, no code changed

 - syscalls.h       update declarations due to unifications
 - irq.c            declare smp_generic_interrupt() before it gets used
 - process.c        declare sys_fork() and sys_vfork() before they get used
 - tsc.c            rename tsc_khz shadowed variable
 - apic/probe_32.c  declare apic_default before it gets used
 - apic/nmi.c       prev_nmi_count should be unsigned
 - apic/io_apic.c   declare smp_irq_move_cleanup_interrupt() before it gets used
 - mm/init.c        declare direct_gbpages and free_initrd_mem before they get used

Signed-off-by: Jaswinder Singh Rajput <jaswinder@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-12 15:20:16 +02:00
Suresh Siddha
a30469e792 x86: add linux kernel support for YMM state
Impact: save/restore Intel-AVX state properly between tasks

Intel Advanced Vector Extensions (AVX) introduce 256-bit vector processing
capability. More about AVX at http://software.intel.com/sites/avx

Add OS support for YMM state management using xsave/xrstor infrastructure
to support AVX.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <1239402084.27006.8057.camel@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-12 13:08:56 +02:00
Jaswinder Singh Rajput
2de1f33e99 x86: apic/x2apic_cluster.c x86_cpu_to_logical_apicid should be static
Impact: reduce kernel size a bit, address sparse warning

Addresses the problem pointed out by this sparse warning:
  arch/x86/kernel/apic/x2apic_cluster.c:13:1: warning: symbol 'per_cpu__x86_cpu_to_logical_apicid' was not declared. Should it be static?

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <1239434726.4418.24.camel@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-12 12:39:24 +02:00
Marcin Slusarz
1ee4bd92a7 x86: fix wrong section of pat_disable & make it static
pat_disable cannot be __cpuinit anymore because it's called from pat_init
and the callchain looks like this:
pat_disable [cpuinit] <- pat_init <- generic_set_all <-
 ipi_handler <- set_mtrr <- (other non init/cpuinit functions)

WARNING: arch/x86/mm/built-in.o(.text+0x449e): Section mismatch in reference
from the function pat_init() to the function .cpuinit.text:pat_disable()
The function pat_init() references
the function __cpuinit pat_disable().
This is often because pat_init lacks a __cpuinit
annotation or the annotation of pat_disable is wrong.

Non CONFIG_X86_PAT version of pat_disable is static inline, so this version
can be static too (and there are no callers outside of this file).

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
LKML-Reference: <49DFB055.6070405@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-12 12:34:23 +02:00
Rakib Mullick
575922248c x86: Fix section mismatches in mpparse
Impact: fix section mismatch

In arch/x86/kernel/mpparse.c, smp_reserve_bootmem() has been called
and also refers to a function which is in .init section. Thus causes
the first warning. And check_irq_src() also requires an __init,
because it refers to an .init section.

Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <b9df5fa10904102004g51265d9axc8d07278bfdb6ba0@mail.gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-12 12:32:18 +02:00
H. Peter Anvin
cf9972a921 x86, setup: fix comment in the "glove box" code
Impact: Comment change only

The glove box is about avoiding problems with *registers* being
touched, not *memory*.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-04-11 22:24:05 -07:00
Masami Hiramatsu
9b987aeb4a x86: fix set_fixmap to use phys_addr_t
Impact: fix kprobes crash on 32-bit with RAM above 4G

Use phys_addr_t for receiving a physical address argument
instead of unsigned long. This allows fixmap to handle
pages higher than 4GB on x86-32.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: systemtap-ml <systemtap@sources.redhat.com>
Cc: Gary Hade <garyhade@us.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <49DE3695.6040800@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 20:27:13 +02:00
Ingo Molnar
47f16ca763 x86, irqinit: preempt merge conflicts
To make the topic merge life easier for tip:perfcounters/core,
include two (inactive in this topic) IRQ vector initializations
here.

Also fix build bug - missing kprobes.h inclusion.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 16:26:43 +02:00
Andreas Herrmann
6265ff19ca x86: cacheinfo: complete L2/L3 Cache and TLB associativity field definitions
See "CPUID Specification" (AMD Publication #: 25481, Rev. 2.28, April 2008)

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Mark Langsdorf <mark.langsdorf@amd.com>
LKML-Reference: <20090409134710.GA8026@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 15:41:18 +02:00
Pekka Enberg
abdb5a5713 x86: remove some ifdefs from native_init_IRQ()
Impact: cleanup

Reviewed-by Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:35:59 +02:00
Pekka Enberg
ac3048dfd4 x86: define IA32_SYSCALL_VECTOR on 32-bit to reduce ifdefs
Impact: cleanup

We can remove some #ifdefs if we define IA32_SYSCALL_VECTOR on 32-bit.

Reviewed-by Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:35:58 +02:00
Pekka Enberg
31cb45ef26 x86: unify irqinit_{32,64}.c into irqinit.c
Impact: cleanup

Reviewed-by Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:35:58 +02:00
Pekka Enberg
ab19c25abd x86: unify apic_intr_init() in irqinit_{32,64}.c
Impact: cleanup

Reviewed-by Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:35:57 +02:00
Pekka Enberg
778838600e x86: unify trivial differences in irqinit_{32,64}.c
Impact: cleanup

Reviewed-by Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:35:57 +02:00
Pekka Enberg
320fd99672 x86: unify native_init_IRQ() in irqinit_{32,64}.c
Impact: cleanup

Reviewed-by Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:35:56 +02:00
Pekka Enberg
598c73d250 x86: unify init_ISA_irqs() in irqinit_{32,64}.c
Impact: cleanup

Reviewed-by Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:35:55 +02:00
Pekka Enberg
b0096bb0b6 x86: unify smp_intr_init() in irqinit_{32,64}.h
Impact: cleanup

Reviewed-by Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:35:55 +02:00
Pekka Enberg
d3496c85ca x86: use identical loop constructs in 32-bit and 64-bit native_init_IRQ()
Impact: cleanup

Reviewed-by Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:35:54 +02:00
Pekka Enberg
22813c4522 x86: introduce apic_intr_init() in irqinit_32.c
Impact: cleanup

Reviewed-by Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:35:54 +02:00
Pekka Enberg
36290d87f5 x86: introduce smp_intr_init() in irqinit_32.c
Impact: cleanup

Reviewed-by Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:35:54 +02:00
Pekka Enberg
7371d9fcb8 x86: move init_ISA_irqs() in irqinit_32.c to match ordering in irqinit_64.c
Impact: cleanup

Reviewed-by Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:35:53 +02:00
Pekka Enberg
f465145235 x86: move x86_quirk_pre_intr_init() to irqinit_32.c
Impact: cleanup

In preparation for unifying irqinit_{32,64}.c, make
x86_quirk_pre_intr_init() local to irqinit_32.c.

Reviewed-by Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:35:53 +02:00
Mark Langsdorf
ba518bea2d x86: cacheinfo: disable L3 ECC scrubbing when L3 cache index is disabled
(Use correct mask to zero out bits 24-28 by Andreas)

Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <20090409132406.GK31527@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:22:34 +02:00
Mark Langsdorf
f8b201fc71 x86: cacheinfo: replace sysfs interface for cache_disable feature
Impact: replace sysfs attribute

Current interface violates against "one-value-per-sysfs-attribute
rule". This patch replaces current attribute with two attributes --
one for each L3 Cache Index Disable register.

Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <20090409131849.GJ31527@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:21:53 +02:00
Andreas Herrmann
afd9fceec5 x86: cacheinfo: use cached K8 NB_MISC devices instead of scanning for it
Impact: avoid code duplication

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Langsdorf <mark.langsdorf@amd.com>
LKML-Reference: <20090409131617.GI31527@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:21:49 +02:00
Andreas Herrmann
845d8c761e x86: cacheinfo: correct return value when cache_disable feature is not active
Impact: bug fix

If user writes to "cache_disable" attribute on a CPU that does not support
this feature, the process hangs due to an invalid return value in
store_cache_disable().

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Langsdorf <mark.langsdorf@amd.com>
LKML-Reference: <20090409130729.GH31527@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:21:42 +02:00
Andreas Herrmann
bda869c614 x86: cacheinfo: use L3 cache index disable feature only for CPUs that support it
AMD family 0x11 CPU doesn't support the feature.

Some AMD family 0x10 CPUs do not support it or have an erratum, see
erratum  in "Revision Guide for AMD Family 10h Processors, 41322
Rev. 3.40 February 2009".

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
CC: Mark Langsdorf <mark.langsdorf@amd.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <20090409130510.GG31527@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 14:21:40 +02:00
Suresh Siddha
0c3c8a1836 x86, PAT: Remove duplicate memtype reserve in devmem mmap
/dev/mem mmap code was doing memtype reserve/free for a while now.
Recently we added memtype tracking in remap_pfn_range, and /dev/mem mmap
uses it indirectly. So, we don't need seperate tracking in /dev/mem code
any more. That means another ~100 lines of code removed :-).

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
LKML-Reference: <20090409212709.085210000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 13:55:48 +02:00
Suresh Siddha
b6ff32d9aa x86, PAT: Consolidate code in pat_x_mtrr_type() and reserve_memtype()
Fix pat_x_mtrr_type() to use UC_MINUS when the mtrr type return UC. This
is to be  consistent with ioremap() and ioremap_nocache() which uses
UC_MINUS.

Consolidate the code such that reserve_memtype() also uses
pat_x_mtrr_type() when the caller doesn't specify any special attribute
(non WB attribute).

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
LKML-Reference: <20090409212708.939936000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 13:55:48 +02:00
venkatesh.pallipadi@intel.com
3869c4aa18 x86, PAT: Changing memtype to WC ensuring no WB alias
As per SDM, there should not be any aliasing of a WC with any cacheable
type across CPUs. That is if one CPU is changing the identity map
memtype to _WC, no other CPU at the time of this change should not have a
TLB for this page that carries a WB attribute. SDM suggests to make the
page not present. But for that we will have to handle any page faults
that can potentially happen due to these pages being not present.

Other way to deal with this without having any WB mapping is to change
the page first to UC and then to WC. This ensures that we meet the SDM
requirement of no cacheable alais to WC page. This also has same or
lower overhead than marking the page not present and making it present
later.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <20090409212708.797481000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 13:55:47 +02:00
venkatesh.pallipadi@intel.com
9fa3ab390a x86, PAT: Handle faults cleanly in set_memory_ APIs
Handle faults and do proper cleanups in set_memory_*() functions. In
some cases, these functions were not doing proper free on failure paths.

With the changes to tracking memtype of RAM pages in struct page instead
of pat list, we do not need the changes in commits c5e147. This patch
reverts that change.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <20090409212708.653222000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 13:55:47 +02:00
venkatesh.pallipadi@intel.com
a5593e0b32 x86, PAT: Change order of cpa and free in set_memory_wb
To be free of aliasing due to races, set_memory_* interfaces should
follow ordering of reserving, changing memtype to UC/WC, changing
memtype back to WB followed by free.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <20090409212708.512280000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 13:55:46 +02:00
Suresh Siddha
43a432b155 x86, CPA: Change idmap attribute before ioremap attribute setup
Change the identity mapping with the requested attribute first, before
we setup the virtual memory mapping with the new requested attribute.

This makes sure that there is no window when identity map'ed attribute
may disagree with ioremap range on the attribute type.

This also avoids doing cpa on the ioremap'ed address twice (first in
ioremap_page_range and then in ioremap_change_attr using vaddr), and
should improve ioremap performance a bit.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
LKML-Reference: <20090409212708.373330000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 13:55:46 +02:00
Andy Grover
a0d22f485a x86: Document get_user_pages_fast()
While better than get_user_pages(), the usage of gupf(),
especially the return values and the fact that it can
potentially only partially pin the range, warranted some
documentation.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Cc: npiggin@suse.de
Cc: akpm@linux-foundation.org
LKML-Reference: <1239320729-3262-1-git-send-email-andy.grover@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 13:14:08 +02:00
Weidong Han
746cddd37d x86, intr-remap: fix eoi for interrupt remapping without x2apic
To simplify level irq migration in the presence of interrupt-remapping,
Suresh used a virtual vector (io-apic pin number) to eliminate io-apic
RTE modification. Level triggered interrupt will appear as an edge to
the local apic cpu but still as level to the IO-APIC. So in addition to
do the local apic EOI, it still needs to do IO-APIC directed EOI to clear
the remote IRR bit in the IO-APIC RTE. Pls refer to Suresh's patch for
more details (commit 0280f7c416).

Now interrupt remapping is decoupled from x2apic, it also needs to do the
directed EOI for apic. Otherwise, apic interrupts won't work correctly.

Signed-off-by: Weidong Han <weidong.han@intel.com>
Cc: iommu@lists.linux-foundation.org
Cc: Weidong Han <weidong.han@intel.com>
Cc: suresh.b.siddha@intel.com
Cc: dwmw2@infradead.org
Cc: allen.m.kay@intel.com
LKML-Reference: <1239355037-22856-1-git-send-email-weidong.han@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 13:12:17 +02:00
Steven Rostedt
e71e99c294 x86, function-graph: only save return values on x86_64
Impact: speed up

The return to handler portion of the function graph tracer should only
need to save the return values. The caller already saved off the
registers that the callee can modify. The returning function already
saved the registers it modified. When we call our own trace function
it too will save the registers that the callee must restore.

There's no reason to save off anything more that the registers used
to return the values.

Note, I did a complete kernel build with this modification and the
function graph tracer running on x86_64.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-10 12:50:58 +02:00
Masami Hiramatsu
3b3809ac53 x86: fix set_fixmap to use phys_addr_t
Use phys_addr_t for receiving a physical address argument instead of
unsigned long.  This allows fixmap to handle pages higher than 4GB on
x86-32.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-09 16:41:45 -07:00
H. Peter Anvin
cf06de7b9c x86, setup: "glove box" BIOS interrupts in the video code
Impact: BIOS proofing

"Glove box" off BIOS interrupts in the video code.

LKML-Reference: <49DE7F79.4030106@zytor.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
2009-04-09 16:08:12 -07:00
H. Peter Anvin
0a706db320 x86, setup: "glove box" BIOS interrupts in the MCA code
Impact: BIOS proofing

"Glove box" off BIOS interrupts in the MCA code.

LKML-Reference: <49DE7F79.4030106@zytor.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-04-09 16:08:11 -07:00
H. Peter Anvin
3435d3476c x86, setup: "glove box" BIOS interrupts in the EDD code
Impact: BIOS proofing

"Glove box" off BIOS interrupts in the EDD code.

LKML-Reference: <49DE7F79.4030106@zytor.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2009-04-09 16:08:11 -07:00
H. Peter Anvin
d54ea252e4 x86, setup: "glove box" BIOS interrupts in the APM code
Impact: BIOS proofing

"Glove box" off BIOS interrupts in the APM code.

LKML-Reference: <49DE7F79.4030106@zytor.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
2009-04-09 16:08:11 -07:00
H. Peter Anvin
df7699c564 x86, setup: "glove box" BIOS interrupts in the core boot code
Impact: BIOS proofing

"Glove box" off BIOS interrupts in the core boot code.

LKML-Reference: <49DE7F79.4030106@zytor.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2009-04-09 16:08:11 -07:00
H. Peter Anvin
7a734e7dd9 x86, setup: "glove box" BIOS calls -- infrastructure
Impact: new interfaces (not yet used)

For all the platforms out there, there is an infinite number of buggy
BIOSes.  This adds infrastructure to treat BIOS interrupts more like
toxic waste and "glove box" them -- we switch out the register set,
perform the BIOS interrupt, and then restore the previous state.

LKML-Reference: <49DE7F79.4030106@zytor.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
2009-04-09 16:08:11 -07:00
Jeremy Fitzhardinge
e7c0648896 xen: add FIX_TEXT_POKE to fixmap
FIX_TEXT_POKE[01] are used to map kernel addresses, so they're mapping
pfns, not mfns.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-09 15:44:58 -07:00
Linus Torvalds
e66dd19092 Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: cpu_debug remove execute permission
  x86: smarten /proc/interrupts output for new counters
  x86: DMI match for the Dell DXP061 as it needs BIOS reboot
  x86: make 64 bit to use default_inquire_remote_apic
  x86, setup: un-resequence mode setting for VGA 80x34 and 80x60 modes
  x86, intel-iommu: fix X2APIC && !ACPI build failure
2009-04-09 10:38:23 -07:00
Linus Torvalds
c2ea122cd7 Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  tracing: consolidate documents
  blktrace: pass the right pointer to kfree()
  tracing/syscalls: use a dedicated file header
  tracing: append a comma to INIT_FTRACE_GRAPH
2009-04-09 10:37:46 -07:00
Jaswinder Singh Rajput
f20ab9c38f x86: cpu_debug remove execute permission
It seems by mistake these files got execute permissions so removing it.

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
LKML-Reference: <1239211186.9037.2.camel@ht.satnam>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-09 06:34:02 +02:00
Frederic Weisbecker
47788c58e6 tracing/syscalls: use a dedicated file header
Impact: fix build warnings and possibe compat misbehavior on IA64

Building a kernel on ia64 might trigger these ugly build warnings:

CC      arch/ia64/ia32/sys_ia32.o
In file included from arch/ia64/ia32/sys_ia32.c:55:
arch/ia64/ia32/ia32priv.h:290:1: warning: "elf_check_arch" redefined
In file included from include/linux/elf.h:7,
                 from include/linux/module.h:14,
                 from include/linux/ftrace.h:8,
                 from include/linux/syscalls.h:68,
                 from arch/ia64/ia32/sys_ia32.c:18:
arch/ia64/include/asm/elf.h:19:1: warning: this is the location of the previous definition
[...]

sys_ia32.c includes linux/syscalls.h which in turn includes linux/ftrace.h
to import the syscalls tracing prototypes.

But including ftrace.h can pull too much things for a low level file,
especially on ia64 where the ia32 private headers conflict with higher
level headers.

Now we isolate the syscall tracing headers in their own lightweight file.

Reported-by: Tony Luck <tony.luck@intel.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Jason Baron <jbaron@redhat.com>
Cc: "Frank Ch. Eigler" <fche@redhat.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Jiaying Zhang <jiayingz@google.com>
Cc: Michael Rubin <mrubin@google.com>
Cc: Martin Bligh <mbligh@google.com>
Cc: Michael Davidson <md@google.com>
LKML-Reference: <20090408184058.GB6017@nowhere>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-09 05:43:32 +02:00
Gary Hade
e85abf8f43 x86: consolidate SMP code in io_apic.c
Impact: Cleanup

Reorganizes the code in arch/x86/kernel/io_apic.c by
combining two '#ifdef CONFIG_SMP' regions.  In addition
to making the code easier to understand the first
'#ifdef CONFIG_SMP' region is moved to a location later
in the file which will reduce the need for function
forward declarations when the code subsequently revised.

The only changes other than relocating code to a different
position in the file were the removal of the assign_irq_vector()
forward declaration which was no longer needed and some line
length reduction formatting changes.

Signed-off-by: Gary Hade <garyhade@us.ibm.com>
Cc: lcm@us.ibm.com
LKML-Reference: <20090408210725.GC11159@us.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-09 05:13:57 +02:00
Jeremy Fitzhardinge
3ecb1b7df9 xen: add FIX_TEXT_POKE to fixmap
FIX_TEXT_POKE[01] are used to map kernel addresses, so they're mapping
pfns, not mfns.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-08 17:57:19 -07:00
Jeremy Fitzhardinge
2b2a733447 xen: clean up gate trap/interrupt constants
Use GATE_INTERRUPT/TRAP rather than 0xe/f.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-08 14:25:50 -07:00
Jeremy Fitzhardinge
bc6081ff98 xen: set _PAGE_NX in __supported_pte_mask before pagetable construction
Some 64-bit machines don't support the NX flag in ptes.
Check for NX before constructing the kernel pagetables.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-08 14:25:49 -07:00
Jeremy Fitzhardinge
e3f8a74e3a xen/mmu: weaken flush_tlb_other test
Impact: fixes crashing bug

There's no particular problem with getting an empty cpu mask,
so just shortcut-return if we get one.

Avoids crash reported by Christophe Saout <christophe@saout.de>

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-08 14:25:46 -07:00
Jeremy Fitzhardinge
b96229b50d xen/mmu: some early pagetable cleanups
1. make sure early-allocated ptes are pinned, so they can be later
   unpinned
2. don't pin pmd+pud, just make them RO
3. scatter some __inits around

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-08 14:25:45 -07:00
Alex Nixon
b40bf53eff Xen: Add virt_to_pfn helper function
Signed-off-by: Alex Nixon <alex.nixon@citrix.com>
2009-04-08 11:51:46 -07:00
Jeremy Fitzhardinge
10eceebeaa x86-64: remove PGE from must-have feature list
PGE may not be available when running paravirtualized, so test the cpuid
bit before using it.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-08 11:51:46 -07:00
Jeremy Fitzhardinge
191216b928 xen: mask XSAVE from cpuid
Xen leaves XSAVE set in cpuid, but doesn't allow cr4.OSXSAVE
to be set.  This confuses the kernel and it ends up crashing on
an xsetbv instruction.

At boot time, try to set cr4.OSXSAVE, and mask XSAVE out of
cpuid it we can't.  This will produce a spurious error from Xen,
but allows us to support XSAVE if/when Xen does.

This also factors out the cpuid mask decisions to boot time.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-08 11:51:46 -07:00
Hannes Eder
1207cf8eb9 NULL noise: arch/x86/xen/smp.c
Fix this sparse warnings:
  arch/x86/xen/smp.c:316:52: warning: Using plain integer as NULL pointer
  arch/x86/xen/smp.c:421:60: warning: Using plain integer as NULL pointer

Signed-off-by: Hannes Eder <hannes@hanneseder.net>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-08 11:51:45 -07:00
Jeremy Fitzhardinge
c667d5d6a7 xen: remove xen_load_gdt debug
Don't need the noise.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-08 11:51:45 -07:00
Jeremy Fitzhardinge
a957fac500 xen: make xen_load_gdt simpler
Remove use of multicall machinery which is unused (gdt loading
is never performance critical).  This removes the implicit use
of percpu variables, which simplifies understanding how
the percpu code's use of load_gdt interacts with this code.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-08 11:51:45 -07:00
Jeremy Fitzhardinge
c7da8c829b xen: clean up xen_load_gdt
Makes the logic a bit clearer.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-08 11:51:45 -07:00
Jeremy Fitzhardinge
cdaead6b4e xen: split construction of p2m mfn tables from registration
Build the p2m_mfn_list_list early with the rest of the p2m table, but
register it later when the real shared_info structure is in place.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-08 11:51:44 -07:00
Jeremy Fitzhardinge
e791ca0fd7 xen: separate p2m allocation from setting
When doing very early p2m setting, we need to separate setting
from allocation, so split things up accordingly.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-08 11:51:44 -07:00
Jeremy Fitzhardinge
d6382bf77e xen: disable preempt for leave_lazy_mmu
xen_mc_flush() requires preemption to be disabled for its own sanity,
so disable it while we're flushing.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-08 11:51:44 -07:00
Hidetoshi Seto
59d138120d x86: smarten /proc/interrupts output for new counters
Now /proc/interrupts of tip tree has new counters:

  PLT: Platform interrupts

Format change of output, as like that by commit:

  commit 7a81d9a7da
  x86: smarten /proc/interrupts output

should be applied to these new counters too.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <49C98DEA.8060208@jp.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-08 18:06:07 +02:00
Ingo Molnar
280ff388b1 Merge commit 'v2.6.30-rc1' into x86/urgent
Merge reason: fix to be queued up depends on upstream facilities

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-08 18:04:52 +02:00
Alan Cox
c5da9a2bb2 x86: DMI match for the Dell DXP061 as it needs BIOS reboot
Closes http://bugzilla.kernel.org/show_bug.cgi?12901

Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
LKML-Reference: <20090326204524.4454.8776.stgit@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-08 17:53:27 +02:00
Yinghai Lu
08d63b10db x86: make 64 bit to use default_inquire_remote_apic
Impact: restore old behavior

for flat and phys_flat

Signed-off-by: Yinhai Lu <yinghai@kernel.org.
LKML-Reference: <49DCBBF1.8080903@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-08 17:36:12 +02:00
Becky Bruce
42d7c5e353 swiotlb: change swiotlb_bus_to[phys,virt] prototypes
Add a hwdev argument that is needed on some architectures
in order to access a per-device offset that is taken into
account when producing a physical address (also needed to
get from bus address to virtual address because the physical
address is an intermediate step).

Also make swiotlb_bus_to_virt weak so architectures can
override it.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Cc: jeremy@goop.org
Cc: ian.campbell@citrix.com
LKML-Reference: <1239199761-22886-8-git-send-email-galak@kernel.crashing.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-08 16:18:38 +02:00
Jack Steiner
54c28d294c x86, uv: add Kconfig dependency on NUMA for UV systems
Impact: build fix

Add Kconfig dependency on NUMA for enabling UV. Although it might
be possible to configure non-NUMA UV systems, they are unsupported
and not interesting. Much of the infrastructure for UV requires
NUMA support.

Signed-off-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20090403203942.GA20137@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-08 14:58:11 +02:00
Russ Anderson
06aa05b307 x86: prevent /sys/firmware/sgi_uv from being created on non-uv systems
/sys/firmware/sgi_uv should only be created on uv systems.

Signed-off-by: Russ Anderson <rja@sgi.com>
LKML-Reference: <20090403222423.GA28546@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-08 14:58:10 +02:00
Yinghai Lu
02421f98ec x86: consistent about warm_reset_vector for UN_NON_UNIQUE_APIC
Impact: cleanup

didn't set it for UV_NON_UNIQUE_APIC, so don't restore it

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <49D6A6B9.6060501@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-08 14:50:28 +02:00
Yinghai Lu
cdc1cb0d44 x86: make wakeup_secondary_cpu_via_init static
Impact: cleanup

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <49D6A692.6040400@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-08 14:50:28 +02:00
Ingo Molnar
a59dacfdc9 x86 early quirks: eliminate unused function
Impact: cleanup

this warning:

  arch/x86/kernel/early-quirks.c:99: warning: ‘ati_ixp4x0_rev’ defined but not used

triggers because ati_ixp4x0_rev() is only used in the
ACPI && X86_IO_APIC case.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-08 14:16:32 +02:00
Jiri Slaby
4ecf458492 x86_64: fix incorrect comments
Impact: cleanup

The comments which fxrstor_checking and fxsave_uset refer to is
now in fxsave. Change the comments appropriately.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
LKML-Reference: <1239190320-23952-3-git-send-email-jirislaby@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-08 13:46:01 +02:00
Jiri Slaby
34ba476a01 x86: unify restore_fpu_checking
Impact: cleanup

On x86_32, separate f*rstor to an inline function which makes
restore_fpu_checking the same on both platforms -> move it
outside the ifdefs.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
LKML-Reference: <1239190320-23952-2-git-send-email-jirislaby@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-08 13:46:01 +02:00
Jiri Slaby
fcb2ac5bdf x86_32: introduce restore_fpu_checking()
Impact: cleanup, prepare FPU code unificaton

Like on x86_64, return an error from restore_fpu and kill the task
if it fails.

Also rename restore_fpu to restore_fpu_checking which allows ifdefs
to be removed in math_state_restore().

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
LKML-Reference: <1239190320-23952-1-git-send-email-jirislaby@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-08 13:46:00 +02:00
Len Brown
8897c18595 Merge branches 'release', 'APERF', 'ARAT', 'misc', 'kelvin', 'device-lock' and 'bjorn.notify' into release 2009-04-07 18:18:42 -04:00
Venkatesh Pallipadi
db954b5898 x86 ACPI: Add support for Always Running APIC timer
Add support for Always Running APIC timer, CPUID_0x6_EAX_Bit2.
This bit means the APIC timer continues to run even when CPU is
in deep C-states.

The advantage is that we can use LAPIC timer on these CPUs
always, and there is no need for "slow to read and program"
external timers (HPET/PIT) and the timer broadcast logic
and related code in C-state entry and exit.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-04-07 18:17:51 -04:00
Venkatesh Pallipadi
18b2646fe3 ACPI x86: Make aperf/mperf MSR access in acpi_cpufreq read_only
Do not write zeroes to APERF and MPERF by ondemand governor. With this
change, other users can share these MSRs for reads.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-04-07 18:15:05 -04:00
Venkatesh Pallipadi
e4f6937222 ACPI x86: Cleanup acpi_cpufreq structures related to aperf/mperf
Change structure name to make the code cleaner and simpler. No
functionality change in this patch.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-04-07 18:15:05 -04:00
Linus Torvalds
c93f216b5b Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  branch tracer, intel-iommu: fix build with CONFIG_BRANCH_TRACER=y
  branch tracer: Fix for enabling branch profiling makes sparse unusable
  ftrace: Correct a text align for event format output
  Update /debug/tracing/README
  tracing/ftrace: alloc the started cpumask for the trace file
  tracing, x86: remove duplicated #include
  ftrace: Add check of sched_stopped for probe_sched_wakeup
  function-graph: add proper initialization for init task
  tracing/ftrace: fix missing include string.h
  tracing: fix incorrect return type of ns2usecs()
  tracing: remove CALLER_ADDR2 from wakeup tracer
  blktrace: fix pdu_len when tracing packet command requests
  blktrace: small cleanup in blk_msg_write()
  blktrace: NUL-terminate user space messages
  tracing: move scripts/trace/power.pl to scripts/tracing/power.pl
2009-04-07 14:10:10 -07:00
Jeremy Fitzhardinge
169aafbc8d lguest: update lazy mmu changes to match lguest's use of kvm hypercalls
Duplicate hcall -> kvm_hypercall0 convertion from "lguest: use KVM
hypercalls".

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Matias Zabaljauregui <zabaljauregui at gmail.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
2009-04-07 13:37:26 -07:00
Jeremy Fitzhardinge
38f4b8c0da Merge commit 'origin/master' into for-linus/xen/master
* commit 'origin/master': (4825 commits)
  Fix build errors due to CONFIG_BRANCH_TRACER=y
  parport: Use the PCI IRQ if offered
  tty: jsm cleanups
  Adjust path to gpio headers
  KGDB_SERIAL_CONSOLE check for module
  Change KCONFIG name
  tty: Blackin CTS/RTS
  Change hardware flow control from poll to interrupt driven
  Add support for the MAX3100 SPI UART.
  lanana: assign a device name and numbering for MAX3100
  serqt: initial clean up pass for tty side
  tty: Use the generic RS485 ioctl on CRIS
  tty: Correct inline types for tty_driver_kref_get()
  splice: fix deadlock in splicing to file
  nilfs2: support nanosecond timestamp
  nilfs2: introduce secondary super block
  nilfs2: simplify handling of active state of segments
  nilfs2: mark minor flag for checkpoint created by internal operation
  nilfs2: clean up sketch file
  nilfs2: super block operations fix endian bug
  ...

Conflicts:
	arch/x86/include/asm/thread_info.h
	arch/x86/lguest/boot.c
	drivers/xen/manage.c
2009-04-07 13:34:16 -07:00
H. Peter Anvin
1e274a5827 x86, setup: un-resequence mode setting for VGA 80x34 and 80x60 modes
Impact: Fixes these modes on at least one system

The rewrite of the setup code into C resequenced the font setting and
register reprogramming phases of configuring nonstandard VGA modes
which use 480 scan lines in text mode.  However, there exists at least
one board (Micro-Star MS-7383 version 2.0) on which this resequencing
causes an unusable display.

Revert to the original sequencing: set up 480-line mode, install the
font, and then adjust the vertical end register appropriately.

This failure was masked by the fact that the 480-line setup was broken
until checkin 5f64135612 (therefore this
is not a -stable candidate bug fix.)

Reported-by: Andi Kleen <andi@firstfloor.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2009-04-07 10:59:25 -07:00
Yang Hongyang
2f4f27d42a dma-mapping: replace all DMA_24BIT_MASK macro with DMA_BIT_MASK(24)
Replace all DMA_24BIT_MASK macro with DMA_BIT_MASK(24)

Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-07 08:31:12 -07:00
Yang Hongyang
284901a90a dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)
Replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)

Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-07 08:31:11 -07:00
Yang Hongyang
50cf156af7 dma-mapping: replace all DMA_40BIT_MASK macro with DMA_BIT_MASK(40)
Replace all DMA_40BIT_MASK macro with DMA_BIT_MASK(40)

Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-07 08:31:10 -07:00
Huang Weiyi
5ab8026a30 tracing, x86: remove duplicated #include
Remove duplicated #include in arch/x86/kernel/ftrace.c.

Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
LKML-Reference: <1238503291-2532-1-git-send-email-weiyi.huang@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-07 14:01:53 +02:00
Markus Metzger
017bc61765 x86, ds: support Core i7
Add debug store support for Core i7.

Core i7 adds a reset value for each performance counter and a new
PEBS record format.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Cc: roland@redhat.com
Cc: eranian@googlemail.com
Cc: oleg@redhat.com
Cc: juan.villacis@intel.com
Cc: ak@linux.jf.intel.com
LKML-Reference: <20090403144607.088997000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-07 13:36:36 +02:00
Markus Metzger
150f5164c1 x86, ds: allow small debug store buffers
Check the buffer size more precisely to allow buffers for exactly
one element provided the base address is already properly aligned.

Add a debug store selftest.

Reported-by: Stephane Eranian <eranian@googlemail.com>
Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Cc: roland@redhat.com
Cc: eranian@googlemail.com
Cc: oleg@redhat.com
Cc: juan.villacis@intel.com
Cc: ak@linux.jf.intel.com
LKML-Reference: <20090403144606.139137000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-07 13:36:35 +02:00
Markus Metzger
608780a904 x86, ds: fix bad ds_reset_pebs()
Ds_reset_pebs() passed the wrong qualifier to a shared function resulting
in a reset of bts, rather than pebs.

Reported-by: Stephane Eranian <eranian@googlemail.com>
Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Cc: roland@redhat.com
Cc: eranian@googlemail.com
Cc: oleg@redhat.com
Cc: juan.villacis@intel.com
Cc: ak@linux.jf.intel.com
LKML-Reference: <20090403144605.206510000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-07 13:36:34 +02:00
Markus Metzger
6047550d3d x86, ds: dont use TIF_DEBUGCTLMSR
Debug store already uses TIF_DS_AREA_MSR to trigger debug store context
switch handling. No need to use TIF_DEBUGCTLMSR, as well.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Cc: roland@redhat.com
Cc: eranian@googlemail.com
Cc: oleg@redhat.com
Cc: juan.villacis@intel.com
Cc: ak@linux.jf.intel.com
LKML-Reference: <20090403144604.256645000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-07 13:36:32 +02:00
Markus Metzger
0f4814065f x86, ptrace: add bts context unconditionally
Add the ptrace bts context field to task_struct unconditionally.

Initialize the field directly in copy_process().
Remove all the unneeded functionality used to initialize that field.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Cc: roland@redhat.com
Cc: eranian@googlemail.com
Cc: oleg@redhat.com
Cc: juan.villacis@intel.com
Cc: ak@linux.jf.intel.com
LKML-Reference: <20090403144603.292754000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-07 13:36:31 +02:00
Markus Metzger
ee811517a5 x86, ds: use single debug store cpu configuration
Use a single configuration for all cpus.

Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Cc: roland@redhat.com
Cc: eranian@googlemail.com
Cc: oleg@redhat.com
Cc: juan.villacis@intel.com
Cc: ak@linux.jf.intel.com
LKML-Reference: <20090403144602.191165000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-07 13:36:29 +02:00
Markus Metzger
2311f0de21 x86, ds: add leakage warning
Add a warning in case a debug store context is not removed before
the task it is attached to is freed.

Remove the old warning at thread exit. It is too early.

Declare the debug store context field in thread_struct unconditionally.

Remove ds_copy_thread() and ds_exit_thread() and do the work directly
in process*.c.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Cc: roland@redhat.com
Cc: eranian@googlemail.com
Cc: oleg@redhat.com
Cc: juan.villacis@intel.com
Cc: ak@linux.jf.intel.com
LKML-Reference: <20090403144601.254472000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-07 13:36:28 +02:00
Markus Metzger
3a68eef945 x86, ds: add task tracing selftest
Add selftests to cover per-task branch tracing.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Cc: roland@redhat.com
Cc: eranian@googlemail.com
Cc: oleg@redhat.com
Cc: juan.villacis@intel.com
Cc: ak@linux.jf.intel.com
LKML-Reference: <20090403144600.329346000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-07 13:36:27 +02:00