AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/arm64/include/asm
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Marc Zyngier 0d3e4d4fad arm/arm64: KVM: Use kernel mapping to perform invalidation on page fault 
When handling a fault in stage-2, we need to resync I$ and D$, just
to be sure we don't leave any old cache line behind.

That's very good, except that we do so using the *user* address.
Under heavy load (swapping like crazy), we may end up in a situation
where the page gets mapped in stage-2 while being unmapped from
userspace by another CPU.

At that point, the DC/IC instructions can generate a fault, which
we handle with kvm->mmu_lock held. The box quickly deadlocks, user
is unhappy.

Instead, perform this invalidation through the kernel mapping,
which is guaranteed to be present. The box is much happier, and so
am I.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2015-01-29 23:24:57 +01:00
..
xen xen/arm/arm64: merge xen/mm32.c into xen/mm.c 2014-12-04 12:41:53 +00:00
alternative-asm.h arm64: add Cortex-A53 cache errata workaround 2014-11-25 15:56:21 +00:00
alternative.h arm64: add module support for alternatives fixups 2014-12-04 10:28:24 +00:00
arch_timer.h arm64: fix missing linux/bug.h include in asm/arch_timer.h 2015-01-07 11:40:59 +00:00
asm-offsets.h arm64: Assembly macros and definitions 2012-09-17 10:24:44 +01:00
assembler.h arm64: debug: avoid accessing mdscr_el1 on fault paths where possible 2014-05-12 16:43:28 +01:00
atomic.h locking,arch: Use ACCESS_ONCE() instead of cast to volatile in atomic_read() 2014-10-03 06:06:23 +02:00
barrier.h arch: Add lightweight memory barriers dma_rmb() and dma_wmb() 2014-12-11 21:15:06 -05:00
bitops.h arch,arm64: Convert smp_mb__*() 2014-04-18 11:40:33 +02:00
cache.h arm64: Implement support for read-mostly sections 2014-12-03 10:19:35 +00:00
cacheflush.h arm64: compat: align cacheflush syscall with arch/arm 2014-12-01 13:31:12 +00:00
cachetype.h arm64: add helper functions to read I-cache attributes 2014-09-08 14:39:18 +01:00
cmpxchg.h arm64: percpu: Implement this_cpu operations 2014-11-20 12:05:18 +00:00
compat.h arm64: add SIGSYS siginfo for compat task 2014-11-28 10:24:59 +00:00
compiler.h arm64: Miscellaneous header files 2012-09-17 13:42:21 +01:00
cpu_ops.h arm64: Remove unneeded extern keyword 2014-10-03 14:51:02 +01:00
cpu.h arm64: sanity checks: add missing AArch32 registers 2015-01-07 11:40:58 +00:00
cpufeature.h arm64: Provide a namespace to NCAPS 2014-12-04 09:57:41 +00:00
cpuidle.h arm64: kernel: introduce cpu_init_idle CPU operation 2014-09-12 10:48:55 +01:00
cputable.h arm64: CPU support 2012-09-17 13:41:59 +01:00
cputype.h arm64: add Cortex-A53 cache errata workaround 2014-11-25 15:56:21 +00:00
debug-monitors.h arm64: Fix typos in KGDB macros 2014-09-25 15:35:41 +01:00
device.h arm64: introduce is_device_dma_coherent 2014-12-04 12:41:49 +00:00
dma-mapping.h arm64: Replace set_arch_dma_coherent_ops with arch_setup_dma_ops 2014-12-22 09:26:32 +00:00
dmi.h arm64: dmi: Add SMBIOS/DMI support 2014-11-05 09:03:25 +01:00
efi.h efi/arm64: efistub: Move shared dependencies to <asm/efi.h> 2014-07-07 20:29:47 +01:00
elf.h arm64: ASLR: Don't randomise text when randomise_va_space == 0 2014-10-24 15:47:49 +01:00
esr.h arm64: Provide read/write fault information in compat signal handlers 2014-05-09 15:47:47 +01:00
exception.h arm64: Use irqchip_init() for interrupt controller initialisation 2013-03-26 16:02:23 +00:00
exec.h arm64: Miscellaneous header files 2012-09-17 13:42:21 +01:00
fb.h arm64: Device specific operations 2012-09-17 13:42:04 +01:00
fixmap.h arm64: Add FIX_HOLE to permanent fixed addresses 2014-11-26 11:32:17 +00:00
fpsimd.h arm64: add support for kernel mode NEON in interrupt context 2014-05-08 11:31:57 +02:00
fpsimdmacros.h arm64: fpsimd: avoid restoring fpcr if the contents haven't changed 2014-07-18 10:21:17 +01:00
ftrace.h arm64: ftrace: Add system call tracepoint 2014-05-29 09:08:33 +01:00
futex.h arm64: asm: remove redundant "cc" clobbers 2014-02-07 16:46:07 +00:00
hardirq.h arm64: Get rid of handle_IRQ 2014-09-03 13:11:00 +00:00
hugetlb.h ARM64: mm: HugeTLB support. 2013-06-14 09:52:40 +01:00
hw_breakpoint.h arm64: ptrace: fix compat hardware watchpoint reporting 2014-08-28 20:01:36 +01:00
hwcap.h arm64: Add COMPAT_HWCAP_LPAE 2014-11-17 10:43:42 +00:00
hypervisor.h arm64/xen: introduce asm/xen header files on arm64 2013-06-07 10:39:45 +00:00
insn.h arm64: Emulate CP15 Barrier instructions 2014-11-20 16:34:48 +00:00
io.h asm-generic: asm/io.h rewrite 2014-12-09 17:25:00 -08:00
irq_work.h arm64: Fix compilation error on UP builds 2014-10-21 17:01:07 +01:00
irq.h arm64/include/asm: Fixed a warning about 'struct pt_regs' 2014-12-04 10:10:59 +00:00
irqflags.h arm64: Add macros to manage processor debug state 2014-02-26 11:16:25 +00:00
jump_label.h arm64, jump label: optimize jump label implementation 2014-01-08 15:23:53 +00:00
Kbuild Merge branch 'irq-irqdomain-arm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-15 17:30:09 -08:00
kgdb.h arm64: Fix typos in KGDB macros 2014-09-25 15:35:41 +01:00
kvm_arm.h arm64/kvm: Fix assembler compatibility of macros 2014-11-06 17:25:28 +00:00
kvm_asm.h arm64: KVM: add trap handlers for AArch32 debug registers 2014-07-11 04:57:45 -07:00
kvm_coproc.h arm64: KVM: common infrastructure for handling AArch32 CP14/CP15 2014-07-11 04:57:44 -07:00
kvm_emulate.h arm/arm64: KVM: Use set/way op trapping to track the state of the caches 2015-01-29 23:24:56 +01:00
kvm_host.h arm/arm64: KVM: Use set/way op trapping to track the state of the caches 2015-01-29 23:24:56 +01:00
kvm_mmio.h arm64: KVM: MMIO access backend 2013-06-07 14:03:38 +01:00
kvm_mmu.h arm/arm64: KVM: Use kernel mapping to perform invalidation on page fault 2015-01-29 23:24:57 +01:00
kvm_psci.h ARM/ARM64: KVM: Make kvm_psci_call() return convention more flexible 2014-04-30 04:18:57 -07:00
linkage.h arm64: fix alignment padding in assembly code 2012-10-20 11:12:01 +01:00
memblock.h arm64: MMU initialisation 2012-09-17 13:41:56 +01:00
memory.h asm-generic: asm/io.h rewrite 2014-12-09 17:25:00 -08:00
mmu_context.h arm64: mm: don't bother invalidating the icache in switch_mm 2013-06-07 18:00:11 +01:00
mmu.h Merge branch 'arm64-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next 2014-06-05 13:15:32 -07:00
module.h arm64: Loadable modules 2012-09-17 13:42:19 +01:00
neon.h arm64: add support for kernel mode NEON in interrupt context 2014-05-08 11:31:57 +02:00
opcodes.h arm64: Add AArch32 instruction set condition code checks 2014-11-20 16:33:45 +00:00
page.h arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area 2014-08-08 15:57:27 -07:00
pci.h arm64: Add architectural support for PCI 2014-09-30 17:08:57 -06:00
percpu.h arm64: percpu: Implement this_cpu operations 2014-11-20 12:05:18 +00:00
perf_event.h arm64: perf: add guest vs host discrimination 2013-01-29 16:56:17 +00:00
pgalloc.h arm64: pgalloc: consistently use PGALLOC_GFP 2014-11-20 12:05:18 +00:00
pgtable-hwdef.h arm64: Remove asm/pgtable-*level-hwdef.h files 2014-07-23 15:27:51 +01:00
pgtable-types.h arm64: Remove asm/pgtable-*level-types.h files 2014-07-23 15:27:56 +01:00
pgtable.h arm64: mm: Add pgd_page to support RCU fast_gup 2014-12-23 16:39:17 +00:00
pmu.h arm64: Performance counters support 2012-09-17 13:42:17 +01:00
proc-fns.h arm64: convert part of soft_restart() to assembly 2014-09-08 14:39:18 +01:00
processor.h arm64: fix missing asm/pgtable-hwdef.h include in asm/processor.h 2015-01-07 11:40:58 +00:00
psci.h PSCI: Add initial support for PSCIv0.2 functions 2014-05-15 10:16:00 -04:00
ptrace.h arm64: Add brackets around user_stack_pointer() 2014-08-29 16:11:00 +01:00
seccomp.h arm64: add seccomp support 2014-11-28 10:24:59 +00:00
shmparam.h arm64: ELF definitions 2012-09-17 13:42:07 +01:00
signal32.h arm64: Use get_signal() signal_setup_done() 2014-08-06 12:56:16 +02:00
smp_plat.h arm64: kernel: build MPIDR_EL1 hash function data structure 2013-12-16 17:17:30 +00:00
smp.h arm64: Tell irq work about self IPI support 2014-09-13 18:46:13 +02:00
sparsemem.h arm64: mm: update max pa bits to 48 2014-08-19 20:23:02 +01:00
spinlock_types.h arm64: Fix the endianness of arch_spinlock_t 2013-10-25 16:10:22 +01:00
spinlock.h arm64/spinlock: Replace ACCESS_ONCE READ_ONCE 2014-12-18 09:54:40 +01:00
stackprotector.h arm64: Add CONFIG_CC_STACKPROTECTOR 2014-07-09 12:23:48 +01:00
stacktrace.h arm64: Exception handling 2012-09-17 10:24:46 +01:00
stat.h UAPI: (Scripted) Disintegrate arch/arm64/include/asm 2012-10-11 11:05:13 +01:00
string.h arm64: lib: Implement optimized string length routines 2014-05-23 15:17:12 +01:00
suspend.h arm64: kernel: refactor the CPU suspend API for retention states 2014-09-12 10:48:55 +01:00
sync_bitops.h arm64/xen: introduce asm/xen header files on arm64 2013-06-07 10:39:45 +00:00
syscall.h arm64: Add audit support 2014-07-10 11:06:00 +01:00
syscalls.h arm64: switch to generic sigaltstack 2013-02-14 09:17:29 -05:00
sysreg.h arm64: gicv3: Allow GICv3 compilation with older binutils 2014-07-25 13:12:15 +01:00
system_misc.h arm64: use common reboot infrastructure 2013-07-19 15:57:08 +01:00
thread_info.h arm64: LLVMLinux: Calculate current_thread_info from current_stack_pointer 2014-09-08 14:39:19 +01:00
timex.h arm64: kernel: compiling issue, need delete read_current_timer() 2013-06-10 17:58:20 +01:00
tlb.h mmu_gather: move minimal range calculations into generic code 2014-11-17 10:12:42 +00:00
tlbflush.h arm64: fix soft lockup due to large tlb flush range 2014-07-24 18:41:13 +01:00
topology.h arm64: sched: Remove unused mc_capable() and smt_capable() 2014-05-16 17:12:04 +01:00
traps.h arm64: Add support for hooks to handle undefined instructions 2014-11-20 16:33:43 +00:00
uaccess.h arm64: Fix __range_ok macro 2014-03-20 17:41:27 +00:00
ucontext.h arm64: fix padding computation in struct ucontext 2013-03-18 10:42:16 +00:00
unistd32.h arm64: compat: wire up compat_sys_execveat 2015-01-12 16:46:21 +00:00
unistd.h arm64: compat: wire up compat_sys_execveat 2015-01-12 16:46:21 +00:00
vdso_datapage.h arm64: VDSO support 2012-09-17 13:42:09 +01:00
vdso.h arm64: VDSO support 2012-09-17 13:42:09 +01:00
virt.h arm64: KVM: remove __kvm_hyp_code_{start,end} from hyp.S 2014-07-11 04:57:35 -07:00
word-at-a-time.h arm64: dcache: select DCACHE_WORD_ACCESS for little-endian CPUs 2013-12-19 17:43:08 +00:00