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c5d86c19086fa752f0ef7ff8bca5df2dfc2fb00f
linux/arch/x86/kernel
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David Kaplan b53c6bd5d2 x86/cpu: Fix check for RDPKRU in __show_regs() 
cpu_feature_enabled(X86_FEATURE_OSPKE) does not necessarily reflect
whether CR4.PKE is set on the CPU.  In particular, they may differ on
non-BSP CPUs before setup_pku() is executed.  In this scenario, RDPKRU
will #UD causing the system to hang.

Fix by checking CR4 for PKE enablement which is always correct for the
current CPU.

The scenario happens by inserting a WARN* before setup_pku() in
identiy_cpu() or some other diagnostic which would lead to calling
__show_regs().

  [ bp: Massage commit message. ]

Signed-off-by: David Kaplan <david.kaplan@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20240421191728.32239-1-bp@kernel.org
2024-04-24 14:30:21 +02:00
..
acpi
Merge tag 'acpi-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2024-03-13 11:54:05 -07:00
apic
x86/bugs: Rename various 'ia32_cap' variables to 'x86_arch_cap_msr'
2024-04-11 10:30:33 +02:00
cpu
x86/CPU/AMD: Add models 0x10-0x1f to the Zen5 range
2024-04-24 14:05:25 +02:00
fpu
x86/fpu: Keep xfd_state in sync with MSR_IA32_XFD
2024-03-24 04:03:54 +01:00
kprobes
kprobes/x86: Use copy_from_kernel_nofault() to read from unsafe address
2024-03-22 11:40:56 +01:00
.gitignore
…
alternative.c
Merge tag 'mm-stable-2024-03-13-20-04' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2024-03-14 17:43:30 -07:00
amd_gart_64.c
arch/x86: Fix typos
2024-01-03 11:46:22 +01:00
amd_nb.c
x86/cpu/amd: Provide a separate accessor for Node ID
2024-02-15 22:07:37 +01:00
aperture_64.c
x86/pci: Use PCI_HEADER_TYPE_* instead of literals
2023-12-01 15:00:43 -06:00
apm_32.c
x86/apm_32: Remove dead function apm_get_battery_status()
2024-02-21 19:38:03 +01:00
asm-offsets_32.c
…
asm-offsets_64.c
x86: Fixup asm-offsets duplicate
2022-10-17 16:41:06 +02:00
asm-offsets.c
x86/bugs: Rename CONFIG_CALL_DEPTH_TRACKING => CONFIG_MITIGATION_CALL_DEPTH_TRACKING
2024-01-10 10:52:28 +01:00
audit_64.c
x86/audit: Fix -Wmissing-variable-declarations warning for ia32_xyz_class
2023-08-30 10:11:16 +02:00
bootflag.c
…
callthunks.c
x86/bpf: Fix IP for relocating call depth accounting
2024-04-01 20:37:56 -07:00
cet.c
x86/ibt: Convert IBT selftest to asm
2023-08-17 17:07:09 +02:00
cfi.c
cfi: Flip headers
2023-12-15 16:25:55 -08:00
check.c
…
cpuid.c
x86/cpuid: make cpuid_class a static const structure
2023-08-05 08:31:41 +02:00
crash_dump_32.c
vmcore: convert copy_oldmem_page() to take an iov_iter
2022-04-29 14:37:59 -07:00
crash_dump_64.c
use less confusing names for iov_iter direction initializers
2022-11-25 13:01:55 -05:00
crash.c
Merge tag 'x86-build-2024-03-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2024-03-11 19:23:16 -07:00
devicetree.c
Merge tag 'devicetree-for-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
2024-03-15 12:37:59 -07:00
doublefault_32.c
x86: Avoid missing-prototype warnings for doublefault code
2023-05-18 11:56:18 -07:00
dumpstack_32.c
x86/percpu: Move irq_stack variables next to current_task
2022-10-17 16:41:05 +02:00
dumpstack_64.c
x86/percpu: Move irq_stack variables next to current_task
2022-10-17 16:41:05 +02:00
dumpstack.c
x86/bugs: Rename CONFIG_PAGE_TABLE_ISOLATION => CONFIG_MITIGATION_PAGE_TABLE_ISOLATION
2024-01-10 10:52:28 +01:00
e820.c
x86/kexec: Do not update E820 kexec table for setup_data
2024-03-22 10:07:45 +01:00
early_printk.c
x86/earlyprintk: Clean up pciserial
2022-08-29 12:19:25 +02:00
early-quirks.c
x86/pci: Use PCI_HEADER_TYPE_* instead of literals
2023-12-01 15:00:43 -06:00
ebda.c
…
eisa.c
x86/sev: Skip ROM range scans and validation for SEV-SNP guests
2024-03-26 15:22:35 +01:00
espfix_64.c
x86/fred: No ESPFIX needed when FRED is enabled
2024-01-31 22:01:51 +01:00
fred.c
x86/fred: Add FRED initialization functions
2024-01-31 22:03:32 +01:00
ftrace_32.S
x86/headers: Replace #include <asm/export.h> with #include <linux/export.h>
2023-10-03 10:38:07 +02:00
ftrace_64.S
x86/headers: Replace #include <asm/export.h> with #include <linux/export.h>
2023-10-03 10:38:07 +02:00
ftrace.c
x86/bugs: Rename CONFIG_SLS => CONFIG_MITIGATION_SLS
2024-01-10 10:52:28 +01:00
head32.c
x86/microcode/32: Move early loading after paging enable
2023-10-18 22:15:01 +02:00
head64.c
x86/boot/64: Move 5-level paging global variable assignments back
2024-03-24 05:00:36 +01:00
head_32.S
x86/bugs: Rename CONFIG_PAGE_TABLE_ISOLATION => CONFIG_MITIGATION_PAGE_TABLE_ISOLATION
2024-01-10 10:52:28 +01:00
head_64.S
Merge branch 'linus' into x86/boot, to resolve conflict
2024-03-12 09:55:57 +01:00
hpet.c
x86/apic/msi: Use DOMAIN_BUS_GENERIC_MSI for HPET/IO-APIC domain search
2024-02-25 18:53:08 +01:00
hw_breakpoint.c
x86/amd: Cache debug register values in percpu variables
2023-01-31 20:09:26 +01:00
i8237.c
…
i8253.c
…
i8259.c
x86/i8259: Skip probing when ACPI/MADT advertises PCAT compatibility
2023-10-27 20:36:49 +02:00
ibt_selftest.S
x86/ibt: Convert IBT selftest to asm
2023-08-17 17:07:09 +02:00
idt.c
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2024-03-15 13:03:13 -07:00
io_delay.c
…
ioport.c
…
irq_32.c
x86/percpu: Move irq_stack variables next to current_task
2022-10-17 16:41:05 +02:00
irq_64.c
x86/percpu: Move irq_stack variables next to current_task
2022-10-17 16:41:05 +02:00
irq_work.c
x86/apic: Wrap IPI calls into helper functions
2023-08-09 12:00:55 -07:00
irq.c
x86: replace CONFIG_HAVE_KVM with IS_ENABLED(CONFIG_KVM)
2024-02-08 08:45:35 -05:00
irqflags.S
x86/headers: Replace #include <asm/export.h> with #include <linux/export.h>
2023-10-03 10:38:07 +02:00
irqinit.c
x86/fred: Invoke FRED initialization code to enable FRED
2024-01-31 22:03:36 +01:00
itmt.c
arch/x86: Remove now superfluous sentinel elem from ctl_table arrays
2023-10-10 15:22:02 -07:00
jailhouse.c
x86/jailhouse: Use new APIC registration function
2024-02-15 22:07:42 +01:00
jump_label.c
jump_label: make initial NOP patching the special case
2022-06-24 09:48:55 +02:00
kdebugfs.c
…
kexec-bzimage64.c
Merge tag 'mm-stable-2024-03-13-20-04' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2024-03-14 17:43:30 -07:00
kgdb.c
x86/kgdb: Fix a kerneldoc warning when build with W=1
2023-09-24 11:00:13 +02:00
ksysfs.c
…
kvm.c
Merge tag 'kvm-x86-asyncpf_abi-6.9' of https://github.com/kvm-x86/linux into HEAD
2024-03-18 19:03:42 -04:00
kvmclock.c
kvmclock: Unexport kvmclock clocksource
2024-02-07 17:05:21 +01:00
ldt.c
x86/bugs: Rename CONFIG_PAGE_TABLE_ISOLATION => CONFIG_MITIGATION_PAGE_TABLE_ISOLATION
2024-01-10 10:52:28 +01:00
machine_kexec_32.c
…
machine_kexec_64.c
x86, crash: wrap crash dumping code into crash related ifdefs
2024-02-23 17:48:23 -08:00
Makefile
Merge tag 'mm-stable-2024-03-13-20-04' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2024-03-14 17:43:30 -07:00
mmconf-fam10h_64.c
…
module.c
x86/paravirt: Switch mixed paravirt/alternative calls to alternatives
2023-12-10 23:33:09 +01:00
mpparse.c
x86/mpparse: Register APIC address only once
2024-03-23 12:41:48 +01:00
msr.c
x86/MSR: make msr_class a static const structure
2023-08-05 08:31:42 +02:00
nmi_selftest.c
x86/apic: Wrap IPI calls into helper functions
2023-08-09 12:00:55 -07:00
nmi.c
x86/nmi: Upgrade NMI backtrace stall checks & messages
2024-03-26 10:07:59 +01:00
paravirt-spinlocks.c
…
paravirt.c
x86/paravirt: Remove no longer needed paravirt patching code
2023-12-10 23:34:37 +01:00
pci-dma.c
x86: always initialize xen-swiotlb when xen-pcifront is enabling
2023-07-31 17:54:27 +02:00
pcspeaker.c
…
perf_regs.c
…
platform-quirks.c
x86/quirks: Include linux/pnp.h for arch_pnpbios_disabled()
2023-05-18 11:56:18 -07:00
pmem.c
x86/pmem: Fix platform-device leak in error path
2022-06-20 18:01:16 +02:00
probe_roms.c
x86/sev: Skip ROM range scans and validation for SEV-SNP guests
2024-03-26 15:22:35 +01:00
process_32.c
x86/fpu: Clean up FPU switching in the middle of task switching
2023-10-20 11:24:22 +02:00
process_64.c
x86/cpu: Fix check for RDPKRU in __show_regs()
2024-04-24 14:30:21 +02:00
process.c
Merge tag 'x86-core-2024-03-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2024-03-11 19:53:15 -07:00
process.h
…
ptrace.c
x86: Add PTRACE interface for shadow stack
2023-08-02 15:01:51 -07:00
pvclock.c
locking/atomic: treewide: use raw_atomic*_<op>()
2023-06-05 09:57:20 +02:00
quirks.c
…
reboot_fixups_32.c
…
reboot.c
x86, crash: wrap crash dumping code into crash related ifdefs
2024-02-23 17:48:23 -08:00
relocate_kernel_32.S
x86/kexec: Disable RET on kexec
2022-07-09 13:12:32 +02:00
relocate_kernel_64.S
x86,objtool: Split UNWIND_HINT_EMPTY in two
2023-03-23 23:18:58 +01:00
resource.c
x86/PCI: Tidy E820 removal messages
2022-12-10 10:33:11 -06:00
rethook.c
x86,rethook: Fix arch_rethook_trampoline() to generate a complete pt_regs
2022-03-28 19:38:51 -07:00
rtc.c
rtc: Extend timeout for waiting for UIP to clear to 1s
2023-12-17 22:33:55 +01:00
setup_percpu.c
x86/asm: Add DB flag to 32-bit percpu GDT entry
2023-12-20 10:57:51 +01:00
setup.c
x86/coco: Require seeding RNG with RDRAND on CoCo systems
2024-04-04 10:40:19 +02:00
sev_verify_cbit.S
x86/boot: Use 32-bit XOR to clear registers
2024-03-01 12:47:37 +01:00
sev-shared.c
x86/sev: Check for MWAITX and MONITORX opcodes in the #VC handler
2024-04-22 18:38:28 +02:00
sev.c
x86/CPU/AMD: Track SNP host status with cc_platform_*()
2024-04-04 10:40:30 +02:00
shstk.c
x86/shstk: Add warning for shadow stack double unmap
2023-09-19 09:18:34 -07:00
signal_32.c
x86/shstk: Add user control-protection fault handler
2023-08-02 15:01:50 -07:00
signal_64.c
x86/shstk: Delay signal entry SSP write until after user accesses
2023-11-08 08:55:37 -08:00
signal.c
rseq: Split out rseq.h from sched.h
2023-12-27 11:49:56 -05:00
smp.c
Merge tag 'mm-stable-2024-03-13-20-04' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2024-03-14 17:43:30 -07:00
smpboot.c
x86/cpu: Ensure that CPU info updates are propagated on UP
2024-03-23 12:22:04 +01:00
stacktrace.c
…
static_call.c
x86/bugs: Rename CONFIG_RETHUNK => CONFIG_MITIGATION_RETHUNK
2024-01-10 10:52:29 +01:00
step.c
x86/msr: Prepare for including <linux/percpu.h> into <asm/msr.h>
2024-03-04 12:01:39 +01:00
sys_ia32.c
…
sys_x86_64.c
x86/vdso: Move vDSO to mmap region
2024-02-27 00:23:55 +01:00
tboot.c
mm: remove rb tree.
2022-09-26 19:46:16 -07:00
time.c
…
tls.c
x86/gsseg: Move load_gs_index() to its own new header file
2023-01-12 13:06:36 +01:00
tls.h
…
topology.c
x86/topology: convert to use arch_cpu_is_hotpluggable()
2023-12-06 12:41:49 +09:00
trace_clock.c
…
trace.c
…
tracepoint.c
x86/traceponit: Fix comment about irq vector tracepoints
2022-05-26 22:03:52 -04:00
traps.c
Merge tag 'x86-core-2024-03-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2024-03-11 19:53:15 -07:00
tsc_msr.c
…
tsc_sync.c
x86/tsc: Defer marking TSC unstable to a worker
2023-10-27 20:36:57 +02:00
tsc.c
treewide: Remove system_counterval_t.cs, which is never read
2024-02-07 17:05:21 +01:00
umip.c
…
unwind_frame.c
x86: kmsan: don't instrument stack walking functions
2022-10-03 14:03:25 -07:00
unwind_guess.c
…
unwind_orc.c
x86/unwind/orc: Remove redundant initialization of 'mid' pointer in __orc_find()
2023-09-21 08:41:23 +02:00
uprobes.c
uprobes/x86: Allow to probe a NOP instruction with 0x66 prefix
2022-12-05 11:55:18 +01:00
verify_cpu.S
…
vm86_32.c
x86/32: Remove lazy GS macros
2022-04-14 14:09:43 +02:00
vmcore_info_32.c
crash: split vmcoreinfo exporting code out from crash_core.c
2024-02-23 17:48:22 -08:00
vmcore_info_64.c
crash: split vmcoreinfo exporting code out from crash_core.c
2024-02-23 17:48:22 -08:00
vmlinux.lds.S
Merge branch 'x86/bugs' into x86/core, to pick up pending changes before dependent patches
2024-02-14 10:49:37 +01:00
vsmp_64.c
x86/apic: Remove unused phys_pkg_id() callback
2024-02-15 22:07:38 +01:00
x86_init.c
x86/sev: Skip ROM range scans and validation for SEV-SNP guests
2024-03-26 15:22:35 +01:00