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| author | Paolo Bonzini <pbonzini@redhat.com> | 2021-11-16 09:32:47 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-12-08 04:24:45 -0500 |
| commit | 1831fa44df743a7cdffdf1c12c799bf6f3c12b8c (patch) | |
| tree | b58db3711a9e9315210acccc53a363ce7b432c47 | |
| parent | 98a26b69d8c3b7b2bd51350b1a1218c518d32123 (diff) | |
| download | lwn-1831fa44df743a7cdffdf1c12c799bf6f3c12b8c.tar.gz lwn-1831fa44df743a7cdffdf1c12c799bf6f3c12b8c.zip | |
KVM: VMX: Don't unblock vCPU w/ Posted IRQ if IRQs are disabled in guest
Don't configure the wakeup handler when a vCPU is blocking with IRQs
disabled, in which case any IRQ, posted or otherwise, should not be
recognized and thus should not wake the vCPU.
Fixes: bf9f6ac8d749 ("KVM: Update Posted-Interrupts Descriptor when vCPU is blocked")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20211009021236.4122790-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/vmx/posted_intr.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx/posted_intr.c b/arch/x86/kvm/vmx/posted_intr.c index 1c94783b5a54..41f946e2123e 100644 --- a/arch/x86/kvm/vmx/posted_intr.c +++ b/arch/x86/kvm/vmx/posted_intr.c @@ -147,7 +147,8 @@ int pi_pre_block(struct kvm_vcpu *vcpu) struct pi_desc old, new; struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu); - if (!vmx_can_use_vtd_pi(vcpu->kvm)) + if (!vmx_can_use_vtd_pi(vcpu->kvm) || + vmx_interrupt_blocked(vcpu)) return 0; WARN_ON(irqs_disabled()); |