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KVM: x86: Prevent set vCPU into INIT/SIPI_RECEIVED state when INIT are latched

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Commit 4b9852f4f3 ("KVM: x86: Fix INIT signal handling in various CPU states")
fixed KVM to also latch pending LAPIC INIT event when vCPU is in VMX
operation.

However, current API of KVM_SET_MP_STATE allows userspace to put vCPU
into KVM_MP_STATE_SIPI_RECEIVED or KVM_MP_STATE_INIT_RECEIVED even when
vCPU is in VMX operation.

Fix this by introducing a util method to check if vCPU state latch INIT
signals and use it in KVM_SET_MP_STATE handler.

Fixes: 4b9852f4f3 ("KVM: x86: Fix INIT signal handling in various CPU states")
Reported-by: Sean Christopherson <sean.j.christopherson@intel.com>
Reviewed-by: Mihai Carabas <mihai.carabas@oracle.com>
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Liran Alon
2019-11-11 11:16:40 +02:00
committed by Paolo Bonzini
parent ff90afa755
commit 27cbe7d618
3 changed files with 12 additions and 3 deletions
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5
arch/x86/kvm/x86.h
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@@ -258,6 +258,11 @@ static inline bool kvm_check_has_quirk(struct kvm *kvm, u64 quirk)
return !(kvm->arch.disabled_quirks & quirk);
}
static inline bool kvm_vcpu_latch_init(struct kvm_vcpu *vcpu)
{
return is_smm(vcpu) || kvm_x86_ops->apic_init_signal_blocked(vcpu);
}
void kvm_set_pending_timer(struct kvm_vcpu *vcpu);
void kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip);