kernel_samsung_a53x/arch/x86/kvm
Sean Christopherson 1a57ae254a x86/cpufeatures: Add CPUID_LNX_5 to track recently added Linux-defined word
commit 8cb4a9a82b21623dbb4b3051dd30d98356cf95bc upstream.

Add CPUID_LNX_5 to track cpufeatures' word 21, and add the appropriate
compile-time assert in KVM to prevent direct lookups on the features in
CPUID_LNX_5.  KVM uses X86_FEATURE_* flags to manage guest CPUID, and so
must translate features that are scattered by Linux from the Linux-defined
bit to the hardware-defined bit, i.e. should never try to directly access
scattered features in guest CPUID.

Opportunistically add NR_CPUID_WORDS to enum cpuid_leafs, along with a
compile-time assert in KVM's CPUID infrastructure to ensure that future
additions update cpuid_leafs along with NCAPINTS.

No functional change intended.

Fixes: 7f274e609f3d ("x86/cpufeatures: Add new word for scattered features")
Cc: Sandipan Das <sandipan.das@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Daniel Sneddon <daniel.sneddon@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-11-19 09:23:11 +01:00
..
mmu
svm
vmx
cpuid.c
cpuid.h x86/cpufeatures: Add CPUID_LNX_5 to track recently added Linux-defined word 2024-11-19 09:23:11 +01:00
debugfs.c
emulate.c
hyperv.c
hyperv.h
i8254.c
i8254.h
i8259.c
ioapic.c
ioapic.h
irq.c
irq.h
irq_comm.c
Kconfig
kvm_cache_regs.h
kvm_emulate.h
lapic.c
lapic.h
Makefile
mmu.h
mtrr.c
pmu.c
pmu.h
trace.h
tss.h
x86.c
x86.h