diff options
| author | Sean Christopherson <seanjc@google.com> | 2025-06-11 15:45:38 -0700 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2025-06-23 09:50:34 -0700 |
| commit | dc6adb13046abe199194f788e5d0dc41c67db5bc (patch) | |
| tree | 4442ad2a7c43787703ea354660af330ad6de5407 | |
| parent | 511754bc548b59e136fcf433da23ba39c74684cf (diff) | |
KVM: x86: Skip IOMMU IRTE updates if there's no old or new vCPU being targeted
Don't "reconfigure" an IRTE into host controlled mode when it's already in
the state, i.e. if KVM's GSI routing changes but the IRQ wasn't and still
isn't being posted to a vCPU.
Link: https://lore.kernel.org/r/20250611224604.313496-37-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
| -rw-r--r-- | arch/x86/kvm/irq.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c index 5b3f721808d5..ecebd150c2f7 100644 --- a/arch/x86/kvm/irq.c +++ b/arch/x86/kvm/irq.c @@ -542,6 +542,9 @@ static int kvm_pi_update_irte(struct kvm_kernel_irqfd *irqfd, vcpu = NULL; } + if (!irqfd->irq_bypass_vcpu && !vcpu) + return 0; + r = kvm_x86_call(pi_update_irte)(irqfd, irqfd->kvm, host_irq, irqfd->gsi, vcpu, irq.vector); if (r) { |