KVM: x86: Track required APICv inhibits with variable, not callback

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Track the per-vendor required APICv inhibits with a variable instead of
calling into vendor code every time KVM wants to query the set of
required inhibits.  The required inhibits are a property of the vendor's
virtualization architecture, i.e. are 100% static.

Using a variable allows the compiler to inline the check, e.g. generate
a single-uop TEST+Jcc, and thus eliminates any desire to avoid checking
inhibits for performance reasons.

No functional change intended.

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230106011306.85230-32-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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This commit is contained in:

Sean Christopherson 2023-01-06 01:13:04 +00:00 • committed by Paolo Bonzini

parent e2ed3e64a2

commit b3f257a846

7 changed files with 29 additions and 36 deletions

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arch/x86/include/asm/kvm-x86-ops.h

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arch/x86/include/asm/kvm_host.h

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arch/x86/kvm/svm/avic.c

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arch/x86/kvm/svm/svm.c

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arch/x86/kvm/svm/svm.h

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arch/x86/kvm/vmx/vmx.c

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arch/x86/kvm/x86.c

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