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KVM: x86: add a flag to disable KVM x2apic broadcast quirk

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Add KVM_X2APIC_API_DISABLE_BROADCAST_QUIRK as a feature flag to
KVM_CAP_X2APIC_API.

The quirk made KVM interpret 0xff as a broadcast even in x2APIC mode.
The enableable capability is needed in order to support standard x2APIC and
remain backward compatible.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
[Expand kvm_apic_mda comment. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Radim Krčmář
2016-07-12 22:09:28 +02:00
committed by Paolo Bonzini
parent 3713131345
commit c519265f2a
5 changed files with 52 additions and 14 deletions
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include/uapi/linux/kvm.h
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@@ -1315,5 +1315,6 @@ struct kvm_assigned_msix_entry {
};
#define KVM_X2APIC_API_USE_32BIT_IDS (1ULL << 0)
#define KVM_X2APIC_API_DISABLE_BROADCAST_QUIRK (1ULL << 1)
#endif /* __LINUX_KVM_H */