Will Deacon 195bbcac2e ARM: 7500/1: io: avoid writeback addressing modes for __raw_ accessors ... Data aborts taken to hyp mode do not provide a valid instruction syndrome field in the HSR if the faulting instruction is a memory access using a writeback addressing mode. For hypervisors emulating MMIO accesses to virtual peripherals, taking such an exception requires disassembling the faulting instruction in order to determine the behaviour of the access. Since this requires manually walking the two stages of translation, the world must be stopped to prevent races against page aging in the guest, where the first-stage translation is invalidated after the hypervisor has translated to an IPA and the physical page is reused for something else. This patch avoids taking this heavy performance penalty when running Linux as a guest by ensuring that our I/O accessors do not make use of writeback addressing modes. Cc: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>		2012-08-25 09:22:32 +01:00
..
hardware	Viresh has moved	2012-06-20 14:39:36 -07:00
mach	ARM: fiq: change FIQ_START to a variable	2012-07-01 21:59:19 +08:00
a.out-core.h
a.out.h
arch_timer.h	ARM: 7451/1: arch timer: implement read_current_timer and get_cycles	2012-07-09 17:42:23 +01:00
asm-offsets.h
assembler.h	ARM: cleanups of io includes	2012-03-29 18:02:10 -07:00
atomic.h	ARM: fix warnings about atomic64_read	2012-07-05 13:06:32 +01:00
barrier.h	ARM: OMAP2+: Fix omap2+ build error	2012-04-03 10:59:10 -07:00
bitops.h	Disintegrate asm/system.h for ARM	2012-03-28 18:30:01 +01:00
bug.h	Disintegrate asm/system.h for ARM	2012-03-28 18:30:01 +01:00
bugs.h
byteorder.h
cache.h
cacheflush.h	ARM: 7479/1: mm: avoid NULL dereference when flushing gate_vma with VIVT caches	2012-07-31 12:04:47 +01:00
cachetype.h
checksum.h
clkdev.h
cmpxchg.h	ARM: 7404/1: cmpxchg64: use atomic64 and local64 routines for cmpxchg64	2012-04-28 17:32:44 +01:00
compiler.h	Disintegrate asm/system.h for ARM	2012-03-28 18:30:01 +01:00
cp15.h	Disintegrate asm/system.h for ARM	2012-03-28 18:30:01 +01:00
cpu.h	arm: Use generic idle thread allocation	2012-04-26 12:06:11 +02:00
cpuidle.h
cputype.h
cti.h
delay.h	ARM: 7452/1: delay: allow timer-based delay implementation to be selected	2012-07-09 17:42:23 +01:00
device.h	ARM: dma-mapping: add support for IOMMU mapper	2012-05-21 15:06:23 +02:00
div64.h	Disintegrate asm/system.h for ARM	2012-03-28 18:30:01 +01:00
dma-contiguous.h	ARM: integrate CMA with DMA-mapping subsystem	2012-05-21 15:09:38 +02:00
dma-iommu.h	ARM: dma-mapping: add support for IOMMU mapper	2012-05-21 15:06:23 +02:00
dma-mapping.h	ARM: dma-mapping: add support for dma_get_sgtable()	2012-07-30 12:25:47 +02:00
dma.h	Disintegrate asm/system.h for ARM	2012-03-28 18:30:01 +01:00
domain.h	ARM: fix set_domain() macro	2012-07-05 09:50:55 +01:00
ecard.h
edac.h
elf.h	ARM: 7294/1: vectors: use gate_vma for vectors user mapping	2012-03-24 09:38:51 +00:00
entry-macro-multi.S
exception.h
fb.h
fcntl.h
fiq.h
fixmap.h
flat.h
floppy.h
fncpy.h
fpstate.h
ftrace.h
futex.h	ARM: 7425/1: extable: ensure fixup entries are 4-byte aligned	2012-06-16 16:30:25 +01:00
glue-cache.h
glue-df.h	ARM: Remove support for ARMv3 ARM610 and ARM710 CPUs	2012-05-05 05:50:50 +01:00
glue-pf.h
glue-proc.h	ARM: Remove support for ARMv3 ARM610 and ARM710 CPUs	2012-05-05 05:50:50 +01:00
glue.h
gpio.h
hardirq.h
highmem.h
hw_breakpoint.h
hw_irq.h
hwcap.h
ide.h
idmap.h
io.h	ARM: 7500/1: io: avoid writeback addressing modes for __raw_ accessors	2012-08-25 09:22:32 +01:00
ioctls.h
irq.h
irqflags.h
jump_label.h	ARM: 7386/1: jump_label: fixup for rename to static_key	2012-04-15 22:00:31 +01:00
Kbuild	ARM: 7494/1: use generic termios.h	2012-08-25 09:22:31 +01:00
kexec.h
kgdb.h
kmap_types.h	arm: remove km_type definitions	2012-07-24 15:27:28 +08:00
kprobes.h
kvm_para.h	kvmclock: Add functions to check if the host has stopped the vm	2012-04-08 12:48:59 +03:00
leds.h
limits.h
linkage.h
localtimer.h
mach-types.h
mc146818rtc.h
memblock.h
memory.h	ARM: 7432/1: use the new linux/sizes.h	2012-06-28 17:14:35 +01:00
mman.h
mmu_context.h	ARM: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW on pre-ARMv6 CPUs	2012-04-17 15:29:44 +01:00
mmu.h	ARM: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW on pre-ARMv6 CPUs	2012-04-17 15:29:44 +01:00
module.h
mtd-xip.h
mutex.h	ARM: 7495/1: mutex: use generic atomic_dec-based implementation for ARMv6+	2012-08-25 09:22:31 +01:00
nwflash.h
opcodes.h	ARM: 7311/1: Add generic instruction opcode manipulation helpers	2012-03-24 09:38:51 +00:00
outercache.h
page-nommu.h
page.h	ARM: Remove support for ARMv3 ARM610 and ARM710 CPUs	2012-05-05 05:50:50 +01:00
pci.h
perf_event.h	ARM: 7448/1: perf: remove arm_perf_pmu_ids global enumeration	2012-07-09 17:41:10 +01:00
pgalloc.h
pgtable-2level-hwdef.h
pgtable-2level-types.h
pgtable-2level.h
pgtable-3level-hwdef.h
pgtable-3level-types.h
pgtable-3level.h	ARM: 7416/1: LPAE: Remove unused L_PTE_(BUFFERABLE|CACHEABLE) macros	2012-05-12 14:38:21 +01:00
pgtable-hwdef.h
pgtable-nommu.h	Remove remaining bits of io_remap_page_range()	2012-03-23 16:58:31 -07:00
pgtable.h
pmu.h	ARM: 7448/1: perf: remove arm_perf_pmu_ids global enumeration	2012-07-09 17:41:10 +01:00
posix_types.h	bury __kernel_nlink_t, make internal nlink_t consistent	2012-05-30 21:04:50 -04:00
proc-fns.h
processor.h	Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-05-23 10:59:07 -07:00
procinfo.h
prom.h	ARM: get rid of asm/irq.h in asm/prom.h	2012-03-24 09:38:54 +00:00
ptrace.h	ARM: 7374/1: add TRACEHOOK support	2012-04-25 19:49:28 +01:00
scatterlist.h
sched_clock.h
seccomp.h
setup.h	ARM: 7465/1: Handle >4GB memory sizes in device tree and mem=size@start option	2012-07-29 22:19:14 +01:00
shmparam.h
sigcontext.h
signal.h
smp_plat.h
smp_scu.h
smp_twd.h
smp.h
sparsemem.h
spinlock_types.h	ARM: 7446/1: spinlock: use ticket algorithm for ARMv6+ locking implementation	2012-07-09 17:41:10 +01:00
spinlock.h	ARM: 7447/1: rwlocks: remove unused branch labels from trylock routines	2012-07-09 17:41:10 +01:00
stackprotector.h
stacktrace.h
stat.h
statfs.h
string.h
suspend.h
swab.h
switch_to.h	Disintegrate asm/system.h for ARM	2012-03-28 18:30:01 +01:00
syscall.h	ARM: 7373/1: add support for the generic syscall.h interface	2012-04-25 19:49:27 +01:00
system_info.h	Disintegrate asm/system.h for ARM	2012-03-28 18:30:01 +01:00
system_misc.h	Disintegrate and delete asm/system.h	2012-03-28 15:58:21 -07:00
system.h	Disintegrate asm/system.h for ARM	2012-03-28 18:30:01 +01:00
tcm.h
therm.h
thread_info.h	ARM: 7443/1: Revert "new way of handling ERESTART_RESTARTBLOCK"	2012-07-05 09:50:56 +01:00
thread_notify.h
timex.h	ARM: 7491/1: use generic version of identical asm headers	2012-08-25 09:22:30 +01:00
tlb.h
tlbflush.h	ARM: Remove support for ARMv3 ARM610 and ARM710 CPUs	2012-05-05 05:50:50 +01:00
tls.h	ARM: 7403/1: tls: remove covert channel via TPIDRURW	2012-04-28 11:01:30 +01:00
topology.h
traps.h
uaccess.h	ARM: 7449/1: use generic strnlen_user and strncpy_from_user functions	2012-07-09 17:41:11 +01:00
ucontext.h
unified.h
unistd.h	ipc: use Kconfig options for __ARCH_WANT_[COMPAT_]IPC_PARSE_VERSION	2012-07-30 17:25:21 -07:00
unwind.h
user.h
vfp.h
vfpmacros.h
vga.h
word-at-a-time.h	ARM: 7450/1: dcache: select DCACHE_WORD_ACCESS for little-endian ARMv6+ CPUs	2012-07-09 17:41:11 +01:00
xor.h