AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/arm64/kernel
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Jisheng Zhang 509ae27a18 arm64: kprobes: Restore local irqflag if kprobes is cancelled 
[ Upstream commit 738fa58ee1328481d1d7889e7c430b3401c571b9 ]

If instruction being single stepped caused a page fault, the kprobes
is cancelled to let the page fault handler continue as a normal page
fault. But the local irqflags are disabled so cpu will restore pstate
with DAIF masked. After pagefault is serviced, the kprobes is
triggerred again, we overwrite the saved_irqflag by calling
kprobes_save_local_irqflag(). NOTE, DAIF is masked in this new saved
irqflag. After kprobes is serviced, the cpu pstate is retored with
DAIF masked.

This patch is inspired by one patch for riscv from Liao Chang.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Link: https://lore.kernel.org/r/20210412174101.6bfb0594@xhacker.debian
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-04-28 13:40:02 +02:00
..
probes arm64: kprobes: Restore local irqflag if kprobes is cancelled 2021-04-28 13:40:02 +02:00
vdso More arm64 updates for 5.10 2020-10-23 09:46:16 -07:00
vdso32 arm64: vdso32: Allow ld.lld to properly link the VDSO 2020-10-26 13:17:41 +00:00
.gitignore
acpi_numa.c
acpi_parking_protocol.c
acpi.c arm64: permit ACPI core to map kernel memory used for table overrides 2020-09-30 22:27:51 +01:00
alternative.c
armv8_deprecated.c
asm-offsets.c
cacheinfo.c
cpu_errata.c arm64: cpu_errata: Apply Erratum 845719 to KRYO2XX Silver 2020-11-13 09:47:08 +00:00
cpu_ops.c
cpu-reset.h
cpu-reset.S arm64/relocate_kernel: remove redundant code 2020-09-11 19:06:25 +01:00
cpufeature.c KVM: arm64: Hide system instruction access to Trace registers 2021-04-16 11:43:19 +02:00
cpuidle.c
cpuinfo.c arm64: avoid -Woverride-init warning 2020-10-28 13:38:36 +00:00
crash_core.c
crash_dump.c arm64: kdump: update ppos when reading elfcorehdr 2021-03-30 14:32:03 +02:00
debug-monitors.c arm64: Improve diagnostics when trapping BRK with FAULT_BRK_IMM 2020-09-18 16:35:54 +01:00
efi-entry.S
efi-header.S arm64: efi: increase EFI PE/COFF header padding to 64 KB 2020-10-28 14:02:03 +00:00
efi-rt-wrapper.S
efi.c treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
entry-common.c arm64: entry: fix EL1 debug transitions 2020-11-30 12:11:38 +00:00
entry-fpsimd.S arm64/sve: Implement a helper to load SVE registers from FPSIMD state 2020-09-21 18:06:33 +01:00
entry-ftrace.S
entry.S arm64: mte: Ensure TIF_MTE_ASYNC_FAULT is set atomically 2021-04-21 13:01:00 +02:00
fpsimd.c arm64: reject prctl(PR_PAC_RESET_KEYS) on compat tasks 2020-10-15 10:50:09 +01:00
ftrace.c
head.S arm64: mm: use a 48-bit ID map when possible on 52-bit VA builds 2021-03-17 17:06:34 +01:00
hibernate-asm.S
hibernate.c Merge branch 'for-next/mte' into for-next/core 2020-10-02 12:16:11 +01:00
hw_breakpoint.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
hyp-stub.S
image-vars.h KVM/arm64 fixes for 5.10, take #1 2020-10-30 13:25:09 -04:00
image.h arm64: get rid of TEXT_OFFSET 2020-09-07 15:00:52 +01:00
insn.c arm64: kprobe: disable probe of fault prone ptrauth instruction 2020-09-14 12:07:02 +01:00
io.c
irq.c arm64: entry: move el1 irq/nmi logic to C 2020-11-30 12:11:38 +00:00
jump_label.c
kaslr.c
kexec_image.c arm64: kexec_file: Fix sparse warning 2020-11-10 13:11:44 +00:00
kgdb.c
kuser32.S
machine_kexec_file.c arm64: kexec_file: fix memory leakage in create_dtb() when fdt_open_into() fails 2021-03-04 11:38:36 +01:00
machine_kexec.c
Makefile Merge branch 'for-next/mte' into for-next/core 2020-10-02 12:16:11 +01:00
module-plts.c arm64/module: set trampoline section flags regardless of CONFIG_DYNAMIC_FTRACE 2020-09-02 08:35:33 +01:00
module.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
mte.c arm64: mte: Allow PTRACE_PEEKMTETAGS access to the zero page 2021-02-17 11:02:28 +01:00
paravirt.c arm64: paravirt: Initialize steal time when cpu is online 2020-09-17 18:12:18 +01:00
pci.c
perf_callchain.c arm64: stacktrace: Make stack walk callback consistent with generic code 2020-09-18 14:24:16 +01:00
perf_event.c arm64: perf: Fix 64-bit event counter read truncation 2021-03-17 17:06:28 +01:00
perf_regs.c perf/arch: Remove perf_sample_data::regs_user_copy 2020-11-09 18:12:34 +01:00
pointer_auth.c arm64: reject prctl(PR_PAC_RESET_KEYS) on compat tasks 2020-10-15 10:50:09 +01:00
process.c arm64 fixes for -rc7 2020-12-02 12:27:37 -08:00
proton-pack.c arm64: proton-pack: Add KRYO2XX silver CPUs to spectre-v2 safe-list 2020-11-13 09:47:08 +00:00
psci.c arm64: psci: Avoid printing in cpu_psci_cpu_die() 2020-11-10 13:11:44 +00:00
ptrace.c arm64: ptrace: Fix seccomp of traced syscall -1 (NO_SYSCALL) 2021-03-04 11:38:32 +01:00
reloc_test_core.c
reloc_test_syms.S
relocate_kernel.S arm64/relocate_kernel: remove redundant code 2020-09-11 19:06:25 +01:00
return_address.c arm64: stacktrace: Make stack walk callback consistent with generic code 2020-09-18 14:24:16 +01:00
scs.c
sdei.c arm64: entry: fix NMI {user, kernel}->kernel transitions 2020-11-30 12:11:38 +00:00
setup.c memblock: use separate iterators for memory and reserved regions 2020-10-13 18:38:35 -07:00
signal32.c
signal.c arm64: entry: remove redundant IRQ flag tracing 2021-01-27 11:55:07 +01:00
sigreturn32.S
sleep.S
smccc-call.S arm64/kernel: Remove needless Call Frame Information annotations 2020-09-01 09:50:36 +02:00
smp_spin_table.c treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
smp.c arm64: smp: Tell RCU about CPUs that fail to come online 2020-11-10 13:11:44 +00:00
stacktrace.c arm64: stacktrace: don't trace arch_stack_walk() 2021-03-30 14:31:54 +02:00
suspend.c arm64: spectre: Prevent lockdep splat on v4 mitigation enable path 2021-03-04 11:38:36 +01:00
sys32.c
sys_compat.c
sys.c
syscall.c arm64: entry: remove redundant IRQ flag tracing 2021-01-27 11:55:07 +01:00
time.c
topology.c Power management updates for 5.10-rc1 2020-10-14 10:45:41 -07:00
trace-events-emulation.h
traps.c arm64: entry: fix NMI {user, kernel}->kernel transitions 2020-11-30 12:11:38 +00:00
vdso.c arm64: vdso: Fix unusual formatting in *setup_additional_pages() 2020-09-01 13:37:57 +01:00
vmlinux.lds.S arm64: vmlinux.lds: account for spurious empty .igot.plt sections 2020-10-28 13:44:24 +00:00