KVM: SVM: Add irqchip_split() checks before enabling AVIC

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SVM AVIC hardware accelerates guest write to APIC_EOI register
(for edge-trigger interrupt), which means it does not trap to KVM.

So, only enable SVM AVIC only in split irqchip mode.
(e.g. launching qemu w/ option '-machine kernel_irqchip=split').

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Fixes: 44a95dae1d ("KVM: x86: Detect and Initialize AVIC support")
[Removed pr_debug - Radim.]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

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Suravee Suthikulpanit 2017-09-12 10:42:42 -05:00 • committed by Radim Krčmář

parent b2a05feff2

commit 67034bb9dd

1 changed files with 4 additions and 5 deletions

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arch/x86/kvm/svm.c

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