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KVM: x86: Track irq_bypass_vcpu in common x86 code

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Track the vCPU that is being targeted for IRQ bypass, a.k.a. for a posted
IRQ, in common x86 code.  This will allow for additional consolidation of
the SVM and VMX code.

Tested-by: Sairaj Kodilkar <sarunkod@amd.com>
Link: https://lore.kernel.org/r/20250611224604.313496-36-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson
2025-06-11 15:45:37 -07:00
parent 77bb184ab8
commit 511754bc54
2 changed files with 6 additions and 5 deletions
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7
arch/x86/kvm/irq.c
View File

@@ -544,8 +544,13 @@ static int kvm_pi_update_irte(struct kvm_kernel_irqfd *irqfd,
r = kvm_x86_call(pi_update_irte)(irqfd, irqfd->kvm, host_irq, irqfd->gsi,
vcpu, irq.vector);
if (r)
if (r) {
WARN_ON_ONCE(irqfd->irq_bypass_vcpu && !vcpu);
irqfd->irq_bypass_vcpu = NULL;
return r;
}
irqfd->irq_bypass_vcpu = vcpu;
trace_kvm_pi_irte_update(host_irq, vcpu, irqfd->gsi, irq.vector, !!vcpu);
return 0;

4
arch/x86/kvm/svm/avic.c
View File

@@ -768,22 +768,18 @@ static void svm_ir_list_del(struct kvm_kernel_irqfd *irqfd)
spin_lock_irqsave(&to_svm(vcpu)->ir_list_lock, flags);
list_del(&irqfd->vcpu_list);
spin_unlock_irqrestore(&to_svm(vcpu)->ir_list_lock, flags);
irqfd->irq_bypass_vcpu = NULL;
}
static int svm_ir_list_add(struct vcpu_svm *svm,
struct kvm_kernel_irqfd *irqfd,
struct amd_iommu_pi_data *pi)
{
struct kvm_vcpu *vcpu = &svm->vcpu;
unsigned long flags;
u64 entry;
if (WARN_ON_ONCE(!pi->ir_data))
return -EINVAL;
irqfd->irq_bypass_vcpu = vcpu;
irqfd->irq_bypass_data = pi->ir_data;
spin_lock_irqsave(&svm->ir_list_lock, flags);