KVM: SVM: Detect X2APIC virtualization (x2AVIC) support

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Add CPUID check for the x2APIC virtualization (x2AVIC) feature.
If available, the SVM driver can support both AVIC and x2AVIC modes
when load the kvm_amd driver with avic=1. The operating mode will be
determined at runtime depending on the guest APIC mode.

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Message-Id: <20220519102709.24125-4-suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Suravee Suthikulpanit 2022-05-19 05:26:55 -05:00 • committed by Paolo Bonzini

parent bf348f667e

commit 4bdec12aa8

4 changed files with 59 additions and 13 deletions

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3

arch/x86/include/asm/svm.h

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45

arch/x86/kvm/svm/avic.c

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15

arch/x86/kvm/svm/svm.c

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arch/x86/kvm/svm/svm.h

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