x86/bugs: Use an x86 feature to track the MMIO Stale Data mitigation

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Convert the MMIO Stale Data mitigation tracking from a static branch into
an x86 feature flag so that it can be used via ALTERNATIVE_2 in KVM.

No functional change intended.

Reviewed-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Reviewed-by: Brendan Jackman <jackmanb@google.com>
Link: https://patch.msgid.link/20251113233746.1703361-5-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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This commit is contained in:

Sean Christopherson 2025-11-13 15:37:41 -08:00

parent afb99ffbd5

commit f6106d41ec

5 changed files with 9 additions and 15 deletions

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5

arch/x86/include/asm/cpufeatures.h

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2

arch/x86/include/asm/nospec-branch.h

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11

arch/x86/kernel/cpu/bugs.c

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2

arch/x86/kvm/mmu/spte.c

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4

arch/x86/kvm/vmx/vmx.c

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