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KVM: SVM: Don't check for assigned device(s) when activating AVIC

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Don't short-circuit IRTE updating when (de)activating AVIC based on the
VM having assigned devices, as nothing prevents AVIC (de)activation from
racing with device (de)assignment.  And from a performance perspective,
bailing early when there is no assigned device doesn't add much, as
ir_list_lock will never be contended if there's no assigned device.

Link: https://lore.kernel.org/r/20250611224604.313496-47-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2025-06-11 15:45:48 -07:00
parent f5998661ff
commit fe0213923d
1 changed files with 0 additions and 3 deletions
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3
arch/x86/kvm/svm/avic.c
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@ -733,9 +733,6 @@ static int avic_set_pi_irte_mode(struct kvm_vcpu *vcpu, bool activate)
struct vcpu_svm *svm = to_svm(vcpu);
struct kvm_kernel_irqfd *irqfd;
if (!kvm_arch_has_assigned_device(vcpu->kvm))
return 0;
/*
* Here, we go through the per-vcpu ir_list to update all existing
* interrupt remapping table entry targeting this vcpu.