KVM: SVM: unconditionally wake up VCPU on IOMMU interrupt

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Checking the mode is unnecessary, and is done without a memory barrier
separating the LAPIC write from the vcpu->mode read; in addition,
kvm_vcpu_wake_up is already doing a check for waiters on the wait queue
that has the same effect.

In practice it's safe because spin_lock has full-barrier semantics on x86,
but don't be too clever.

Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Paolo Bonzini 2017-10-10 12:51:56 +02:00

parent c1bd743e54

commit 1cf53587c0

1 changed files with 1 additions and 4 deletions

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arch/x86/kvm/svm.c

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