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| author | Sean Christopherson <[email protected]> | 2025-04-01 16:18:03 +0000 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2025-04-24 13:52:31 +0000 |
| commit | 6560aff981ada9aec8163509a59d8f48283263d6 (patch) | |
| tree | 29f7d61917b559a149dba3a22997a7a8cef86f08 /rust/helpers/build_bug.c | |
| parent | KVM: arm64, x86: make kvm_arch_has_irq_bypass() inline (diff) | |
| download | kernel-6560aff981ada9aec8163509a59d8f48283263d6.tar.gz kernel-6560aff981ada9aec8163509a59d8f48283263d6.zip | |
KVM: SVM: Don't update IRTEs if APICv/AVIC is disabled
Skip IRTE updates if AVIC is disabled/unsupported, as forcing the IRTE
into remapped mode (kvm_vcpu_apicv_active() will never be true) is
unnecessary and wasteful. The IOMMU driver is responsible for putting
IRTEs into remapped mode when an IRQ is allocated by a device, long before
that device is assigned to a VM. I.e. the kernel as a whole has major
issues if the IRTE isn't already in remapped mode.
Opportunsitically kvm_arch_has_irq_bypass() to query for APICv/AVIC, so
so that all checks in KVM x86 incorporate the same information.
Cc: Yosry Ahmed <[email protected]>
Cc: Jim Mattson <[email protected]>
Signed-off-by: Sean Christopherson <[email protected]>
Message-ID: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'rust/helpers/build_bug.c')
0 files changed, 0 insertions, 0 deletions