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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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arch/x86/include/asm/kvm_host.h
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@@ -784,6 +784,7 @@ struct kvm_arch {
struct page *avic_physical_id_table_page;
bool x2apic_format;
bool x2apic_broadcast_quirk_disabled;
};
struct kvm_vm_stat {