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KVM: x86: complete fast IN directly with complete_emulator_pio_in()

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Use complete_emulator_pio_in() directly when completing fast PIO, there's
no need to bounce through emulator_pio_in(): the comment about ECX
changing doesn't apply to fast PIO, which isn't used for string I/O.

No functional change intended.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2022-06-15 13:32:29 -04:00
parent 091abbf578
commit 7a6177d6f3
1 changed files with 1 additions and 5 deletions
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6
arch/x86/kvm/x86.c
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@ -8871,11 +8871,7 @@ static int complete_fast_pio_in(struct kvm_vcpu *vcpu)
/* For size less than 4 we merge, else we zero extend */
val = (vcpu->arch.pio.size < 4) ? kvm_rax_read(vcpu) : 0;
/*
* Since vcpu->arch.pio.count == 1 let emulator_pio_in perform
* the copy and tracing
*/
emulator_pio_in(vcpu, vcpu->arch.pio.size, vcpu->arch.pio.port, &val, 1);
complete_emulator_pio_in(vcpu, &val);
kvm_rax_write(vcpu, val);
return kvm_skip_emulated_instruction(vcpu);