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| author | Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> | 2022-05-19 05:27:05 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-06-24 12:51:00 -0400 |
| commit | 0e311d33bfbef86da130674e8528cc23e6acfe16 (patch) | |
| tree | d403f50e8ef865cf7bb412dcbb2ce1a244fcf392 /arch/x86/include | |
| parent | c0caeee65af3944b7b8abbf566e7cc1fae15c775 (diff) | |
| download | linux-0e311d33bfbef86da130674e8528cc23e6acfe16.tar.gz linux-0e311d33bfbef86da130674e8528cc23e6acfe16.tar.bz2 linux-0e311d33bfbef86da130674e8528cc23e6acfe16.zip | |
KVM: SVM: Introduce hybrid-AVIC mode
Currently, AVIC is inhibited when booting a VM w/ x2APIC support.
because AVIC cannot virtualize x2APIC MSR register accesses.
However, the AVIC doorbell can be used to accelerate interrupt
injection into a running vCPU, while all guest accesses to x2APIC MSRs
will be intercepted and emulated by KVM.
With hybrid-AVIC support, the APICV_INHIBIT_REASON_X2APIC is
no longer enforced.
Suggested-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Message-Id: <20220519102709.24125-14-suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 88a3026ee163..de5a149d0971 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1130,11 +1130,6 @@ enum kvm_apicv_inhibit { APICV_INHIBIT_REASON_PIT_REINJ, /* - * AVIC is inhibited because the guest has x2apic in its CPUID. - */ - APICV_INHIBIT_REASON_X2APIC, - - /* * AVIC is disabled because SEV doesn't support it. */ APICV_INHIBIT_REASON_SEV, |