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linux/arch/arm64/kernel
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James Morse 3290c6ffef KVM: arm64: Add kvm_extable for vaxorcism code 
commit e9ee186bb7 upstream.

KVM has a one instruction window where it will allow an SError exception
to be consumed by the hypervisor without treating it as a hypervisor bug.
This is used to consume asynchronous external abort that were caused by
the guest.

As we are about to add another location that survives unexpected exceptions,
generalise this code to make it behave like the host's extable.

KVM's version has to be mapped to EL2 to be accessible on nVHE systems.

The SError vaxorcism code is a one instruction window, so has two entries
in the extable. Because the KVM code is copied for VHE and nVHE, we end up
with four entries, half of which correspond with code that isn't mapped.

Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-09-09 19:04:31 +02:00
..
probes arm64: debug: Ensure debug handlers check triggering exception level 2019-03-23 20:10:08 +01:00
vdso arm64: vdso: Fix clock_getres() for CLOCK_REALTIME 2019-05-31 06:46:21 -07:00
.gitignore
acpi_numa.c arm64: numa: rework ACPI NUMA initialization 2018-07-09 18:21:40 +01:00
acpi_parking_protocol.c
acpi.c acpi/arm64: ignore 5.1 FADTs that are reported as 5.0 2019-07-26 09:14:10 +02:00
alternative.c arm64/alternatives: don't patch up internal branches 2020-07-22 09:32:01 +02:00
arm64ksyms.c arm64: lib: use C string functions with KASAN enabled 2019-12-01 09:17:01 +01:00
armv8_deprecated.c arm64: armv8_deprecated: Fix undef_hook mask for thumb setend 2020-04-17 10:48:50 +02:00
asm-offsets.c arm64: vdso: Fix clock_getres() for CLOCK_REALTIME 2019-05-31 06:46:21 -07:00
cacheinfo.c arm64: Add support for ACPI based firmware tables 2018-05-17 17:28:09 +01:00
cpu_errata.c arm64: errata: Hide CTR_EL0.DIC on systems affected by Neoverse-N1 #1542419 2020-04-29 16:31:08 +02:00
cpu_ops.c arm64: cpu_ops: fix a leaked reference by adding missing of_node_put 2019-05-31 06:46:27 -07:00
cpu-reset.h arm64: kexec: always reset to EL2 if present 2018-07-04 18:34:24 +01:00
cpu-reset.S
cpufeature.c arm64: cpufeature: Set the FP/SIMD compat HWCAP bits properly 2020-02-19 19:51:54 +01:00
cpuidle.c
cpuinfo.c arm64: cpufeature: Detect SSBS and advertise to userspace 2019-10-11 18:21:10 +02:00
crash_core.c arm64: kernel: arch_crash_save_vmcoreinfo() should depend on CONFIG_CRASH_CORE 2018-09-11 11:08:49 +01:00
crash_dump.c
debug-monitors.c arm64: Use test_tsk_thread_flag() for checking TIF_SINGLESTEP 2020-07-29 10:16:54 +02:00
efi-entry.S
efi-header.S
efi-rt-wrapper.S
efi.c
entry-fpsimd.S arm64/sve: Write ZCR_EL1 on context switch only if changed 2018-05-17 18:19:53 +01:00
entry-ftrace.S arm64: ftrace: don't adjust the LR value 2019-02-12 19:47:04 +01:00
entry.S Revert "arm64: preempt: Fix big-endian when checking preempt count in assembly" 2019-12-21 10:57:20 +01:00
fpsimd.c arm64: sve: Fix build failure when ARM64_SVE=y and SYSCTL=n 2020-06-30 23:17:15 -04:00
ftrace.c arm64: ftrace: Ensure synchronisation in PLT setup for Neoverse-N1 #1542419 2019-11-06 13:05:47 +01:00
head.S arm64: Fix size of __early_cpu_boot_status 2020-04-13 10:45:16 +02:00
hibernate-asm.S
hibernate.c arm64: hibernate: check pgd table allocation 2020-01-27 14:51:19 +01:00
hw_breakpoint.c arm64: hw_breakpoint: Don't invoke overflow handler on uaccess watchpoints 2020-06-25 15:33:06 +02:00
hyp-stub.S arm64: hyp-stub: Forbid kprobing of the hyp-stub 2019-02-06 17:30:12 +01:00
image.h arm64/efi: Mark __efistub_stext_offset as an absolute symbol explicitly 2019-07-26 09:13:56 +02:00
insn.c arm64: insn: Fix two bugs in encoding 32-bit logical immediates 2020-06-22 09:05:10 +02:00
io.c
irq.c arm64: Fix HCR.TGE status for NMI contexts 2019-03-23 20:10:08 +01:00
jump_label.c jump_label: move 'asm goto' support test to Kconfig 2019-06-04 08:02:34 +02:00
kaslr.c arm64/kernel: kaslr: reduce module randomization range to 2 GB 2019-05-31 06:46:01 -07:00
kgdb.c arm64: kgdb: Fix single-step exception handling oops 2020-07-16 08:17:24 +02:00
kuser32.S
machine_kexec.c arm64: fix the flush_icache_range arguments in machine_kexec 2020-05-20 08:18:43 +02:00
Makefile arm64: kernel: arch_crash_save_vmcoreinfo() should depend on CONFIG_CRASH_CORE 2018-09-11 11:08:49 +01:00
module-plts.c arm64/kernel: rename module_emit_adrp_veneer->module_emit_veneer_for_adrp 2018-04-24 19:07:35 +01:00
module.c arm64: kaslr: keep modules inside module region when KASAN is enabled 2019-07-10 09:53:43 +02:00
module.lds
paravirt.c
pci.c
perf_callchain.c
perf_event.c arm64: perf: set suppress_bind_attrs flag to true 2019-01-26 09:32:35 +01:00
perf_regs.c arm64: perf: Report the PC value in REGS_ABI_32 mode 2020-06-30 23:17:17 -04:00
process.c arm64: ssbs: Fix context-switch when SSBS is present on all CPUs 2020-02-19 19:51:56 +01:00
psci.c arm64: psci: Reduce the waiting time for cpu_psci_cpu_kill() 2019-12-31 16:35:26 +01:00
ptrace.c arm64: ptrace: Consistently use pseudo-singlestep exceptions 2020-07-22 09:32:12 +02:00
reloc_test_core.c
reloc_test_syms.S
relocate_kernel.S
return_address.c arm64: unwind: Prohibit probing on return_address() 2019-08-25 10:47:56 +02:00
sdei.c arm64: fix wrong check of on_sdei_stack in nmi context 2019-05-08 07:21:49 +02:00
setup.c arm64: Fix /proc/iomem for reserved but not memory regions 2018-10-12 15:25:16 +01:00
signal.c arm64: ptrace: Consistently use pseudo-singlestep exceptions 2020-07-22 09:32:12 +02:00
signal32.c arm64: use {COMPAT,}SYSCALL_DEFINE0 for sigreturn 2018-07-12 14:49:48 +01:00
sleep.S
smccc-call.S
smp_spin_table.c
smp.c arm64: smp: fix crash_smp_send_stop() behaviour 2020-03-25 08:06:15 +01:00
ssbd.c arm64: ssbd: Add support for PSTATE.SSBS rather than trapping to EL3 2019-10-11 18:21:30 +02:00
stacktrace.c arm64: unwind: Prohibit probing on return_address() 2019-08-25 10:47:56 +02:00
suspend.c arm64: ssbd: Restore mitigation status on CPU resume 2018-05-31 17:35:19 +01:00
sys_compat.c arm64: Silence clang warning on mismatched value/register sizes 2020-04-29 16:31:09 +02:00
sys.c arm64: use the correct function type for __arm64_sys_ni_syscall 2019-06-22 08:15:20 +02:00
sys32.c arm64: use the correct function type for __arm64_sys_ni_syscall 2019-06-22 08:15:20 +02:00
syscall.c arm64: compat: Ensure upper 32 bits of x0 are zero on syscall return 2020-07-22 09:32:13 +02:00
time.c
topology.c arm64: topology: Use PPTT to determine if PE is a thread 2019-10-17 13:45:35 -07:00
trace-events-emulation.h
traps.c arm64: Fake the IminLine size on systems affected by Neoverse-N1 #1542419 2020-04-29 16:31:09 +02:00
vdso.c arm64/vdso: don't leak kernel addresses 2020-01-27 14:50:36 +01:00
vmlinux.lds.S KVM: arm64: Add kvm_extable for vaxorcism code 2020-09-09 19:04:31 +02:00