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KVM: x86: wean fast IN from emulator_pio_in

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Use __emulator_pio_in() directly for fast PIO instead of bouncing through
emulator_pio_in() now that __emulator_pio_in() fills "val" when handling
in-kernel PIO.  vcpu->arch.pio.count is guaranteed to be '0', so this a
pure nop.

emulator_pio_in_emulated is now the last caller of emulator_pio_in.

No functional change intended.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini
2021-10-22 08:01:36 -04:00
parent 0c05e10bce
commit dc7a4bfde5
1 changed files with 1 additions and 1 deletions
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arch/x86/kvm/x86.c
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@@ -8886,7 +8886,7 @@ static int kvm_fast_pio_in(struct kvm_vcpu *vcpu, int size,
/* For size less than 4 we merge, else we zero extend */
val = (size < 4) ? kvm_rax_read(vcpu) : 0;
ret = emulator_pio_in(vcpu, size, port, &val, 1);
ret = __emulator_pio_in(vcpu, size, port, &val, 1);
if (ret) {
kvm_rax_write(vcpu, val);
return ret;