On 5/23/2025 6:29 AM, Sean Christopherson wrote:
Infer whether or not a vCPU should be marked running from the validity of
the pCPU on which it is running. amd_iommu_update_ga() already skips the
IRTE update if the pCPU is invalid, i.e. passing %true for is_run with an
invalid pCPU would be a blatant and egregrious KVM bug.
Tested-by: Sairaj Kodilkar <sarunkod@xxxxxxx>
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
arch/x86/kvm/svm/avic.c | 11 +++++------
drivers/iommu/amd/iommu.c | 14 +++++++++-----
include/linux/amd-iommu.h | 6 ++----
3 files changed, 16 insertions(+), 15 deletions(-)
diff --git a/arch/x86/kvm/svm/avic.c b/arch/x86/kvm/svm/avic.c
index 4747fb09aca4..c79648d96752 100644
--- a/arch/x86/kvm/svm/avic.c
+++ b/arch/x86/kvm/svm/avic.c
@@ -832,7 +832,7 @@ int avic_pi_update_irte(struct kvm_kernel_irqfd *irqfd, struct kvm *kvm,
entry = svm->avic_physical_id_entry;
if (entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK)
amd_iommu_update_ga(entry & AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK,
- true, pi_data.ir_data);
+ pi_data.ir_data);
irqfd->irq_bypass_data = pi_data.ir_data;
list_add(&irqfd->vcpu_list, &svm->ir_list);
@@ -841,8 +841,7 @@ int avic_pi_update_irte(struct kvm_kernel_irqfd *irqfd, struct kvm *kvm,
return irq_set_vcpu_affinity(host_irq, NULL);
}
-static inline int
-avic_update_iommu_vcpu_affinity(struct kvm_vcpu *vcpu, int cpu, bool r)
+static inline int avic_update_iommu_vcpu_affinity(struct kvm_vcpu *vcpu, int cpu)
{
Hi sean
What if define cpu as "unsigned int" instead of "int" and use nr_cpu_ids
as invalid cpu id ? I see that it is common in the other subsystems to
use nr_cpu_ids instead of -1.
Thanks
Sairaj
