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Marc Zyngier 57c841f131 arm/arm64: KVM: Handle out-of-RAM cache maintenance as a NOP 
So far, our handling of cache maintenance by VA has been pretty
simple: Either the access is in the guest RAM and generates a S2
fault, which results in the page being mapped RW, or we go down
the io_mem_abort() path, and nuke the guest.

The first one is fine, but the second one is extremely weird.
Treating the CM as an I/O is wrong, and nothing in the ARM ARM
indicates that we should generate a fault for something that
cannot end-up in the cache anyway (even if the guest maps it,
it will keep on faulting at stage-2 for emulation).

So let's just skip this instruction, and let the guest get away
with it.

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-02-29 18:34:15 +00:00
..
xen
xen/events: Support event channel rebind on ARM
2015-08-20 12:24:15 +01:00
acenv.h
ARM64 / ACPI: Get RSDP and ACPI boot-time tables
2015-03-25 11:49:30 +00:00
acpi.h
Power management and ACPI updates for v4.4-rc1
2015-11-04 18:10:13 -08:00
alternative.h
arm64: mm: fold alternatives into .init
2015-12-10 17:36:08 +00:00
arch_gicv3.h
irqchip/gic-v3: Make sure read from ICC_IAR1_EL1 is visible on redestributor
2016-02-11 10:20:02 +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
arm-cci.h
arm-cci: Get rid of secure transactions for PMU driver
2015-03-27 13:44:35 +00:00
asm-offsets.h
…
assembler.h
arm64: Add this_cpu_ptr() assembler macro for use in entry.S
2015-12-10 12:08:09 +00:00
atomic_ll_sc.h
arm64: cmpxchg_dbl: fix return value type
2015-11-05 17:29:40 +00:00
atomic_lse.h
arm64: cmpxchg_dbl: fix return value type
2015-11-05 17:29:40 +00:00
atomic.h
arm64 updates for 4.4:
2015-11-04 14:47:13 -08:00
barrier.h
arm64: define __smp_xxx
2016-01-12 20:46:53 +02:00
bitops.h
arch,arm64: Convert smp_mb__*()
2014-04-18 11:40:33 +02:00
bitrev.h
ARM: 8189/1: arm64:add bitrev.h file to support rbit instruction
2014-12-22 16:47:32 +00:00
boot.h
arm64: use fixmap region for permanent FDT mapping
2015-06-02 16:31:33 +01:00
bug.h
arm64/BUG: Use BRK instruction for generic BUG traps
2015-07-27 11:08:42 +01:00
cache.h
arm64: Increase the max granular size
2015-10-28 19:09:17 +00:00
cacheflush.h
arm64: Use PoU cache instr for I/D coherency
2015-12-17 11:07:13 +00:00
cachetype.h
arm64: cachetype: fix definitions of ICACHEF_* flags
2015-10-28 18:32:12 +00:00
cmpxchg.h
arm64: cmpxchg: Don't incldue linux/mmdebug.h
2015-12-10 17:36:09 +00:00
compat.h
arm64: do not include ptrace.h from compat.h
2015-11-17 13:24:36 +00:00
compiler.h
arm64: Miscellaneous header files
2012-09-17 13:42:21 +01:00
cpu_ops.h
ARM64: kernel: unify ACPI and DT cpus initialization
2015-05-19 16:09:29 +01:00
cpu.h
arm64: Consolidate CPU Sanity check to CPU Feature infrastructure
2015-10-21 15:35:56 +01:00
cpufeature.h
arm64 fixes:
2015-11-27 11:09:59 -08:00
cpuidle.h
arm64: kernel: rename __cpu_suspend to keep it aligned with arm
2015-06-19 14:46:39 +01:00
cputype.h
arm64 updates for 4.4:
2015-11-04 14:47:13 -08:00
dcc.h
ARM64: TTY: hvc_dcc: Add support for ARM64 dcc
2015-10-04 17:49:27 +01:00
debug-monitors.h
arm64: debug: rename enum debug_el to avoid symbol collision
2015-07-27 18:36:54 +01:00
device.h
arm64: introduce is_device_dma_coherent
2014-12-04 12:41:49 +00:00
dma-mapping.h
dma-mapping: always provide the dma_map_ops based implementation
2016-01-20 17:09:18 -08:00
dmi.h
arm64: dmi: Add SMBIOS/DMI support
2014-11-05 09:03:25 +01:00
efi.h
arm64/efi: refactor EFI init and runtime code for reuse by 32-bit ARM
2015-12-09 16:57:23 +00:00
elf.h
mm: fold arch_randomize_brk into ARCH_HAS_ELF_RANDOMIZE
2015-04-14 16:49:05 -07:00
esr.h
arm64/debug: Add missing #includes
2015-07-27 11:08:42 +01:00
exception.h
arm64: Add __exception_irq_entry definition for function graph
2015-08-12 17:23:45 +01:00
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: Simplify NR_FIX_BTMAPS calculation
2015-10-19 17:54:07 +01:00
fpsimd.h
arm64: add support for kernel mode NEON in interrupt context
2014-05-08 11:31:57 +02:00
fpsimdmacros.h
arm64: Avoid breakage caused by .altmacro in fpsimd save/restore macros
2015-01-29 17:24:39 +00:00
ftrace.h
arm64: ftrace: fix a stack tracer's output under function graph tracer
2015-12-21 17:26:02 +00:00
futex.h
arm64: futex.h: Add missing PAN toggling
2016-02-02 15:59:21 +00:00
hardirq.h
arm64: Remove ununsed set_irq_flags
2015-09-16 16:53:39 +02:00
hugetlb.h
arm64: hugetlb: add support for PTE contiguous bit
2015-12-21 17:26:00 +00:00
hw_breakpoint.h
arm64: debug: Treat the BRPs/WRPs as unsigned
2015-11-26 18:08:36 +00:00
hwcap.h
arm64/HWCAP: Use system wide safe values
2015-10-21 15:35:58 +01:00
hypervisor.h
arm64/xen: introduce asm/xen header files on arm64
2013-06-07 10:39:45 +00:00
insn.h
arm64: insn: Add aarch64_{get,set}_branch_offset
2015-06-03 15:43:24 +01:00
io.h
Revert "arm64: ioremap: add ioremap_cache macro"
2015-10-13 16:18:17 +01:00
irq_work.h
arm64: force CONFIG_SMP=y and remove redundant #ifdefs
2015-07-27 11:08:40 +01:00
irq.h
arm64: remove irq_count and do_softirq_own_stack()
2015-12-21 17:26:01 +00:00
irqflags.h
arm64: Add macros to manage processor debug state
2014-02-26 11:16:25 +00:00
jump_label.h
locking/static_keys: Add a new static_key interface
2015-08-03 11:34:15 +02:00
kasan.h
arm64: kasan: fix issues reported by sparse
2015-10-13 14:54:42 +01:00
Kbuild
mm: clean up per architecture MM hook header files
2015-07-17 16:39:53 -07:00
kernel-pgtable.h
arm64: Calculate size for idmap_pg_dir at compile time
2015-10-19 17:53:26 +01:00
kgdb.h
arm64: Fix typos in KGDB macros
2014-09-25 15:35:41 +01:00
kvm_arm.h
arm64: KVM: Configure TCR_EL2.PS at runtime
2016-02-11 13:16:47 +00:00
kvm_asm.h
ARM: KVM: Remove __kvm_hyp_code_start/__kvm_hyp_code_end
2016-02-29 18:34:12 +00:00
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: Handle out-of-RAM cache maintenance as a NOP
2016-02-29 18:34:15 +00:00
kvm_host.h
arm/arm64: KVM: Add hook for C-based stage2 init
2016-02-29 18:34:12 +00:00
kvm_mmio.h
arm64: KVM: Turn system register numbers to an enum
2015-12-14 11:30:43 +00:00
kvm_mmu.h
kvm: rename pfn_t to kvm_pfn_t
2016-01-15 17:56:32 -08:00
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
lse.h
arm64: lse: rename ARM64_CPU_FEAT_LSE_ATOMICS for consistency
2015-07-27 15:28:54 +01:00
memblock.h
arm64: MMU initialisation
2012-09-17 13:41:56 +01:00
memory.h
arm64 updates for 4.4:
2015-11-04 14:47:13 -08:00
mmu_context.h
arm64: use non-global mappings for UEFI runtime regions
2015-11-18 09:40:20 +00:00
mmu.h
arm64: mm: rewrite ASID allocator and MM context-switching code
2015-10-07 11:55:41 +01:00
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: asm: Explicitly include linux/personality.h in asm/page.h
2016-02-03 19:22:02 +00:00
paravirt.h
arm64: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops
2015-12-21 14:40:54 +00:00
pci.h
ARM64 / ACPI: Introduce PCI stub functions for ACPI
2015-03-25 11:49:31 +00:00
percpu.h
arm64: force CONFIG_SMP=y and remove redundant #ifdefs
2015-07-27 11:08:40 +01:00
perf_event.h
arm64: perf: factor out callchain code
2015-07-27 11:08:39 +01:00
pgalloc.h
arm64: move PGD_SIZE definition to pgalloc.h
2015-10-12 17:46:30 +01:00
pgtable-hwdef.h
arm64: hugetlb: add support for PTE contiguous bit
2015-12-21 17:26:00 +00:00
pgtable-types.h
arm64: expose number of page table levels on Kconfig level
2015-04-14 16:49:01 -07:00
pgtable.h
arm64: Honour !PTE_WRITE in set_pte_at() for kernel mappings
2016-01-25 11:09:06 +00:00
proc-fns.h
arm64: kill flush_cache_all()
2015-05-19 15:27:42 +01:00
processor.h
arm64: Delay cpu feature capability checks
2015-10-21 15:35:58 +01:00
ptrace.h
arm64: Fix compat register mappings
2015-10-29 16:55:15 +00:00
seccomp.h
arm64: add seccomp support
2014-11-28 10:24:59 +00:00
shmparam.h
arm64: fix COMPAT_SHMLBA definition for large pages
2015-12-02 14:00:10 +00:00
signal32.h
arm64: Use get_signal() signal_setup_done()
2014-08-06 12:56:16 +02:00
smp_plat.h
arm64: remove dead-code depending on CONFIG_UP_LATE_INIT
2015-07-29 18:32:09 +01:00
smp.h
arm64: force CONFIG_SMP=y and remove redundant #ifdefs
2015-07-27 11:08:40 +01:00
sparsemem.h
arm64: mm: update max pa bits to 48
2014-08-19 20:23:02 +01:00
spinlock_types.h
arm64: include linux/types.h in asm/spinlock_types.h
2015-07-27 11:09:34 +01:00
spinlock.h
arm64: spinlock: serialise spin_unlock_wait against concurrent lockers
2015-12-03 19:37:59 +00:00
stackprotector.h
arm64: Add CONFIG_CC_STACKPROTECTOR
2014-07-09 12:23:48 +01:00
stacktrace.h
arm64: ftrace: fix a stack tracer's output under function graph tracer
2015-12-21 17:26:02 +00:00
stat.h
UAPI: (Scripted) Disintegrate arch/arm64/include/asm
2012-10-11 11:05:13 +01:00
string.h
arm64: add KASAN support
2015-10-12 17:46:36 +01:00
suspend.h
arm64: kernel: rename __cpu_suspend to keep it aligned with arm
2015-06-19 14:46:39 +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
sysreg.h
arm64: Add macros to read/write system registers
2015-12-14 11:30:38 +00:00
system_misc.h
arm64: use private ratelimit state along with show_unhandled_signals
2015-06-19 16:26:15 +01:00
thread_info.h
arm64: Store struct thread_info in sp_el0
2015-12-08 11:40:48 +00:00
timex.h
arm64: kernel: compiling issue, need delete read_current_timer()
2013-06-10 17:58:20 +01:00
tlb.h
arm64: tlbflush: avoid flushing when fullmm == 1
2015-10-07 11:56:21 +01:00
tlbflush.h
arm64: tlb: remove redundant barrier from __flush_tlb_pgtable
2015-10-07 11:56:33 +01:00
topology.h
arm64: force CONFIG_SMP=y and remove redundant #ifdefs
2015-07-27 11:08:40 +01:00
traps.h
arm64: Add __exception_irq_entry definition for function graph
2015-08-12 17:23:45 +01:00
uaccess.h
arm64: kernel: Add support for Privileged Access Never
2015-07-27 11:08:41 +01:00
unistd32.h
arm64: compat: wire up new syscalls
2015-10-14 13:51:41 +01:00
unistd.h
arm64: compat: wire up new syscalls
2015-10-14 13:51:41 +01:00
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