diff options
| author |   Maxim Levitsky <mlevitsk@redhat.com> | 2022-06-06 21:08:24 +0300 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2022-06-09 10:52:18 -0400 |
| commit | 3743c2f0251743b8ae968329708bbbeefff244cf (patch) | |
| tree | d132dd783c2f463eedffd3de0eafcd2f4a49a1c5 /arch/x86/include | |
| parent | KVM: x86: document AVIC/APICv inhibit reasons (diff) | |
| download | linux-dev-3743c2f0251743b8ae968329708bbbeefff244cf.tar.xz linux-dev-3743c2f0251743b8ae968329708bbbeefff244cf.zip | |
KVM: x86: inhibit APICv/AVIC on changes to APIC ID or APIC base
Neither of these settings should be changed by the guest and it is
a burden to support it in the acceleration code, so just inhibit
this code instead.
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20220606180829.102503-3-mlevitsk@redhat.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 | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 1f9e47b895cf..9217bd6cf0d1 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1076,6 +1076,14 @@ enum kvm_apicv_inhibit { */ APICV_INHIBIT_REASON_BLOCKIRQ, + /* + * For simplicity, the APIC acceleration is inhibited + * first time either APIC ID or APIC base are changed by the guest + * from their reset values. + */ + APICV_INHIBIT_REASON_APIC_ID_MODIFIED, + APICV_INHIBIT_REASON_APIC_BASE_MODIFIED, + /******************************************************/ /* INHIBITs that are relevant only to the AMD's AVIC. */ /******************************************************/ |