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423ba1b3a5a768935b12b3f9dde6937fe7949039
android_kernel_xiaomi_sm8450/arch/x86/kernel
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Josh Poimboeuf 423ba1b3a5 x86/srso: Fix srso_show_state() side effect 
[ Upstream commit a8cf700c17d9ca6cb8ee7dc5c9330dbac3948237 ]

Reading the 'spec_rstack_overflow' sysfs file can trigger an unnecessary
MSR write, and possibly even a (handled) exception if the microcode
hasn't been updated.

Avoid all that by just checking X86_FEATURE_IBPB_BRTYPE instead, which
gets set by srso_select_mitigation() if the updated microcode exists.

Fixes: fb3bd914b3ec ("x86/srso: Add a Speculative RAS Overflow mitigation")
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
Acked-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/27d128899cb8aee9eb2b57ddc996742b0c1d776b.1693889988.git.jpoimboe@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-10-10 21:53:27 +02:00
..
acpi
x86: ACPI: cstate: Optimize C3 entry on AMD CPUs
2023-02-01 08:23:18 +01:00
apic
x86/apic: Fix kernel panic when booting with intremap=off and x2apic_phys
2023-06-28 10:28:16 +02:00
cpu
x86/srso: Fix srso_show_state() side effect
2023-10-10 21:53:27 +02:00
fpu
x86/fpu: Set X86_FEATURE_OSXSAVE feature after enabling OSXSAVE in CR4
2023-08-30 16:23:17 +02:00
kprobes
x86/kprobes: Fix JNG/JNLE emulation
2023-08-11 11:57:46 +02:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
alternative.c
x86/srso: Fix return thunks in generated code
2023-08-08 19:57:40 +02:00
amd_gart_64.c
dma-mapping: split <linux/dma-mapping.h>
2020-10-06 07:07:03 +02:00
amd_nb.c
x86/amd_nb: Add AMD family 17h model 60h PCI IDs
2020-05-22 18:24:40 +02:00
apb_timer.c
x86/apb_timer: Drop unused TSC calibration
2020-05-27 13:05:59 +02:00
aperture_64.c
…
apm_32.c
x86/APM: drop the duplicate APM_MINOR_DEV macro
2023-09-19 12:20:17 +02:00
asm-offsets_32.c
Merge tag 'x86-entry-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-03-30 19:14:28 -07:00
asm-offsets_64.c
x86/pv: Switch SWAPGS to ALTERNATIVE
2021-12-08 09:03:27 +01:00
asm-offsets.c
x86: remove address space overrides using set_fs()
2020-09-08 22:21:36 -04:00
audit_64.c
x86/audit: Fix a -Wmissing-prototypes warning for ia32_classify_syscall()
2020-05-19 18:03:07 +02:00
bootflag.c
…
cc_platform.c
x86/sev: Add an x86 version of cc_platform_has()
2021-11-18 14:04:32 +01:00
check.c
…
cpuid.c
…
crash_core_32.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
crash_core_64.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
crash_dump_32.c
…
crash_dump_64.c
…
crash.c
x86/crash: Disable virt in core NMI crash handler to avoid double shootdown
2023-03-11 16:39:58 +01:00
devicetree.c
x86_ioapic_Consolidate_IOAPIC_allocation
2020-09-16 16:52:32 +02:00
doublefault_32.c
x86/entry: Convert double fault exception to IDTENTRY_DF
2020-06-11 15:15:03 +02:00
dumpstack_32.c
x86/32: Remove CONFIG_DOUBLEFAULT
2020-04-14 14:24:05 +02:00
dumpstack_64.c
x86/dumpstack/64: Add noinstr version of get_stack_info()
2020-09-09 11:33:19 +02:00
dumpstack.c
x86/show_trace_log_lvl: Ensure stack pointer is aligned, again
2023-05-30 12:57:58 +01:00
e820.c
x86/boot: Fix memremap of setup_indirect structures
2022-03-16 14:16:02 +01:00
early_printk.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
early-quirks.c
x86/gpu: Reserve stolen memory for first integrated Intel GPU
2022-01-27 10:53:41 +01:00
ebda.c
…
eisa.c
…
espfix_64.c
mm: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
ftrace_32.S
x86: Prepare asm files for straight-line-speculation
2022-07-25 11:26:28 +02:00
ftrace_64.S
x86/ibt,ftrace: Make function-graph play nice
2022-09-20 12:38:33 +02:00
ftrace.c
ftrace/x86: Add back ftrace_expected for ftrace bug reports
2023-01-14 10:16:33 +01:00
head32.c
…
head64.c
x86: Clear .brk area at early boot
2022-07-21 21:20:17 +02:00
head_32.S
x86/asm/32: Fix ANNOTATE_UNRET_SAFE use on 32-bit
2022-07-25 11:26:53 +02:00
head_64.S
objtool: Add entry UNRET validation
2022-07-25 11:26:45 +02:00
hpet.c
rtc: Check return value from mc146818_get_time()
2022-12-14 11:31:55 +01:00
hw_breakpoint.c
x86/debug: Prevent data breakpoints on cpu_dr7
2021-02-10 09:29:22 +01:00
i8237.c
…
i8253.c
…
i8259.c
x86/i8259: Mark legacy PIC interrupts with IRQ_LEVEL
2023-02-01 08:23:27 +01:00
idt.c
Merge tag 'x86_seves_for_v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-10-14 10:21:34 -07:00
ima_arch.c
ima: force signature verification when CONFIG_KEXEC_SIG is configured
2022-07-21 21:20:11 +02:00
io_delay.c
…
ioport.c
x86/ioperm: Prevent a memory leak when fork fails
2020-05-28 21:36:20 +02:00
irq_32.c
x86/irq: Rework handle_irq() for 64-bit
2020-06-11 15:15:12 +02:00
irq_64.c
x86/irq: Make run_on_irqstack_cond() typesafe
2020-09-22 22:13:34 +02:00
irq_work.c
x86/entry: Convert various system vectors
2020-06-11 15:15:14 +02:00
irq.c
x86/irq: Ensure PI wakeup handler is unregistered before module unload
2021-11-18 14:03:41 +01:00
irqflags.S
x86: Prepare asm files for straight-line-speculation
2022-07-25 11:26:28 +02:00
irqinit.c
x86/i8259: Mark legacy PIC interrupts with IRQ_LEVEL
2023-02-01 08:23:27 +01:00
itmt.c
sysctl: pass kernel pointers to ->proc_handler
2020-04-27 02:07:40 -04:00
jailhouse.c
locking/seqlock, headers: Untangle the spaghetti monster
2020-08-06 16:13:13 +02:00
jump_label.c
x86/jump_label: Move 'inline' keyword placement
2020-03-27 11:05:41 +01:00
kdebugfs.c
x86/boot: Fix memremap of setup_indirect structures
2022-03-16 14:16:02 +01:00
kexec-bzimage64.c
x86/kexec: Use up-to-dated screen_info copy to fill boot params
2020-10-14 17:05:03 +02:00
kgdb.c
x86/debug: Change thread.debugreg6 to thread.virtual_dr6
2020-09-04 15:12:58 +02:00
ksysfs.c
x86/boot: Fix memremap of setup_indirect structures
2022-03-16 14:16:02 +01:00
kvm.c
x86, kvm: use proper ASM macros for kvm_vcpu_is_preempted
2022-07-25 11:26:52 +02:00
kvmclock.c
x86/kvmclock: Move this_cpu_pvti into kvmclock.h
2021-10-06 15:55:48 +02:00
ldt.c
x86/ldt: use "pr_info_once()" instead of open-coding it badly
2020-07-05 12:50:20 -07:00
machine_kexec_32.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
machine_kexec_64.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
Makefile
x86/sev: Add an x86 version of cc_platform_has()
2021-11-18 14:04:32 +01:00
mmconf-fam10h_64.c
…
module.c
x86: Undo return-thunk damage
2022-07-25 11:26:36 +02:00
mpparse.c
Merge tag 'x86-irq-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-10-12 11:40:41 -07:00
msr.c
x86/MSR: Filter MSR writes through X86_IOC_WRMSR_REGS ioctl too
2021-03-04 11:37:26 +01:00
nmi_selftest.c
…
nmi.c
KVM/VMX: Invoke NMI non-IST entry instead of IST entry
2021-05-19 10:12:51 +02:00
paravirt_patch.c
x86/pv: Switch SWAPGS to ALTERNATIVE
2021-12-08 09:03:27 +01:00
paravirt-spinlocks.c
…
paravirt.c
x86: Prepare inline-asm for straight-line-speculation
2022-07-25 11:26:29 +02:00
pci-dma.c
dma-mapping: move dma-debug.h to kernel/dma/
2020-10-06 07:07:05 +02:00
pci-iommu_table.c
…
pci-swiotlb.c
…
pcspeaker.c
…
perf_regs.c
perf/arch: Remove perf_sample_data::regs_user_copy
2020-11-09 18:12:34 +01:00
platform-quirks.c
…
pmem.c
x86/pmem: Fix platform-device leak in error path
2022-08-21 15:15:33 +02:00
probe_roms.c
maccess: make get_kernel_nofault() check for minimal type compatibility
2020-06-18 12:10:37 -07:00
process_32.c
x86/resctl: fix scheduler confusion with 'current'
2023-03-11 16:40:19 +01:00
process_64.c
x86/resctl: fix scheduler confusion with 'current'
2023-03-11 16:40:19 +01:00
process.c
x86: Mark stop_this_cpu() __noreturn
2023-03-11 16:39:23 +01:00
process.h
…
ptrace.c
x86/debug: Change thread.debugreg6 to thread.virtual_dr6
2020-09-04 15:12:58 +02:00
pvclock.c
x86/vdso: Use generic VDSO clock mode storage
2020-02-17 14:40:23 +01:00
quirks.c
x86, powerpc: Rename memcpy_mcsafe() to copy_mc_to_{user, kernel}()
2020-10-06 11:18:04 +02:00
reboot_fixups_32.c
…
reboot.c
x86/reboot: Disable virtualization in an emergency if SVM is supported
2023-03-11 16:39:58 +01:00
relocate_kernel_32.S
x86/kexec: Disable RET on kexec
2022-07-25 11:26:51 +02:00
relocate_kernel_64.S
x86/kexec: Disable RET on kexec
2022-07-25 11:26:51 +02:00
resource.c
…
rtc.c
…
setup_percpu.c
x86/mm: remove vmalloc faulting
2020-06-02 10:59:12 -07:00
setup.c
x86/boot: Fix memremap of setup_indirect structures
2022-03-16 14:16:02 +01:00
sev_verify_cbit.S
x86: Prepare asm files for straight-line-speculation
2022-07-25 11:26:28 +02:00
sev-es-shared.c
x86/sev: Return an error on a returned non-zero SW_EXITINFO1[31:0]
2021-10-13 10:04:30 +02:00
sev-es.c
x86/insn: Rename insn_decode() to insn_decode_from_regs()
2022-07-25 11:26:10 +02:00
signal_compat.c
arm64: mte: Add specific SIGSEGV codes
2020-09-04 12:46:06 +01:00
signal.c
entry: Add support for TIF_NOTIFY_SIGNAL
2023-01-04 11:39:18 +01:00
smp.c
x86/reboot: Disable SVM, not just VMX, when stopping CPUs
2023-03-11 16:39:58 +01:00
smpboot.c
x86/smp: Use dedicated cache-line for mwait_play_dead()
2023-07-27 08:43:30 +02:00
stacktrace.c
stacktrace: Remove reliable argument from arch_stack_walk() callback
2020-09-18 14:24:16 +01:00
static_call.c
x86/static_call: Fix __static_call_fixup()
2023-08-26 15:26:58 +02:00
step.c
ptrace: Reimplement PTRACE_KILL by always sending SIGKILL
2022-06-09 10:20:49 +02:00
sys_ia32.c
x86: switch to kernel_clone()
2020-08-20 13:12:58 +02:00
sys_x86_64.c
x86/mm: Cleanup the control_va_addr_alignment() __setup handler
2022-06-09 10:21:06 +02:00
sysfb_efi.c
efi: sysfb_efi: Add quirk for Lenovo Yoga Book X91F/L
2023-04-20 12:10:27 +02:00
sysfb_simplefb.c
x86/sysfb: Fix check for bad VRAM size
2020-01-20 10:57:53 +01:00
sysfb.c
…
tboot.c
mm/gup: prevent gup_fast from racing with COW during fork
2020-12-30 11:53:54 +01:00
time.c
Merge tag 'x86-urgent-2020-06-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-06-11 15:54:31 -07:00
tls.c
x86: switch to ->regset_get()
2020-07-27 14:31:07 -04:00
tls.h
x86: switch to ->regset_get()
2020-07-27 14:31:07 -04:00
topology.c
x86/headers: Remove APIC headers from <asm/smp.h>
2020-08-06 16:13:09 +02:00
trace_clock.c
…
tracepoint.c
x86/entry: Convert reschedule interrupt to IDTENTRY_SYSVEC_SIMPLE
2020-06-11 15:15:16 +02:00
traps.c
x86/CPU/AMD: Fix the DIV(0) initial fix attempt
2023-08-26 15:26:58 +02:00
tsc_msr.c
Merge tag 'x86-urgent-2020-08-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-08-15 10:38:03 -07:00
tsc_sync.c
x86/tsc: Add a timer to make sure TSC_adjust is always checked
2021-12-08 09:03:28 +01:00
tsc.c
clocksource: Reduce clocksource-skew threshold
2022-01-27 10:54:05 +01:00
umip.c
x86/insn: Rename insn_decode() to insn_decode_from_regs()
2022-07-25 11:26:10 +02:00
unwind_frame.c
Merge tag 'fork-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
2020-08-04 14:47:45 -07:00
unwind_guess.c
…
unwind_orc.c
x86/unwind/orc: Fix unreliable stack dump with gcov
2022-11-03 23:57:51 +09:00
uprobes.c
uprobes/x86: Allow to probe a NOP instruction with 0x66 prefix
2023-01-14 10:15:21 +01:00
verify_cpu.S
x86: Prepare asm files for straight-line-speculation
2022-07-25 11:26:28 +02:00
vm86_32.c
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
2020-06-09 09:39:14 -07:00
vmlinux.lds.S
x86/retpoline,kprobes: Fix position of thunk sections with CONFIG_LTO_CLANG
2023-08-26 15:26:58 +02:00
vsmp_64.c
…
x86_init.c
x86/rtc: Remove __init for runtime functions
2023-04-20 12:10:28 +02:00