Messages in this thread Patch in this message | | | From | Feng Wu <> | Subject | [PATCH 11/13] KVM: Suppress posted-interrupt when 'SN' is set | Date | Mon, 10 Nov 2014 14:26:50 +0800 |
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Currently, we don't support urgent interrupt, all interrupts are recognized as non-urgent interrupt, so we cannot send posted-interrupt when 'SN' is set.
Signed-off-by: Feng Wu <feng.wu@intel.com> --- arch/x86/kvm/vmx.c | 11 +++++++++-- 1 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 51d2c8a..495cfbd 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4306,15 +4306,22 @@ static int vmx_vm_has_apicv(struct kvm *kvm) static void vmx_deliver_posted_interrupt(struct kvm_vcpu *vcpu, int vector) { struct vcpu_vmx *vmx = to_vmx(vcpu); - int r; + int r, sn; if (pi_test_and_set_pir(vector, &vmx->pi_desc)) return; + /* + * Currently, we don't support urgent interrupt, all interrupts + * are recognized as non-urgent interrupt, so we cannot send + * posted-interrupt when 'SN' is set. + */ + sn = pi_test_sn(&vmx->pi_desc); + r = pi_test_and_set_on(&vmx->pi_desc); kvm_make_request(KVM_REQ_EVENT, vcpu); #ifdef CONFIG_SMP - if (!r && (vcpu->mode == IN_GUEST_MODE)) + if (!r && !sn && (vcpu->mode == IN_GUEST_MODE)) apic->send_IPI_mask(get_cpu_mask(vcpu->cpu), POSTED_INTR_VECTOR); else -- 1.7.1
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