[PATCH 5.14 115/169] KVM: x86: remove unnecessary arguments from complete_emulator_pio_in

Greg Kroah-Hartman
2021-10-25T19:53:56Z

From: Paolo Bonzini <pbonzini@redhat.com>

commit 6b5efc930bbc8c97e4a1fe2ccb9a6f286365a56d upstream.

complete_emulator_pio_in can expect that vcpu->arch.pio has been filled in,
and therefore does not need the size and count arguments. This makes things
nicer when the function is called directly from a complete_userspace_io
callback.

No functional change intended.

Cc: stable@vger.kernel.org
Fixes: 7ed9abfe8e9f ("KVM: SVM: Support string IO operations for an SEV-ES guest")
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/kvm/x86.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)

--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6936,11 +6936,12 @@ static int __emulator_pio_in(struct kvm_
return emulator_pio_in_out(vcpu, size, port, count, true);
}

-static void complete_emulator_pio_in(struct kvm_vcpu *vcpu, int size,
- unsigned short port, void *val)
+static void complete_emulator_pio_in(struct kvm_vcpu *vcpu, void *val)
{
- memcpy(val, vcpu->arch.pio_data, size * vcpu->arch.pio.count);
- trace_kvm_pio(KVM_PIO_IN, port, size, vcpu->arch.pio.count, vcpu->arch.pio_data);
+ int size = vcpu->arch.pio.size;
+ unsigned count = vcpu->arch.pio.count;
+ memcpy(val, vcpu->arch.pio_data, size * count);
+ trace_kvm_pio(KVM_PIO_IN, vcpu->arch.pio.port, size, count, vcpu->arch.pio_data);
vcpu->arch.pio.count = 0;
}

@@ -6958,7 +6959,7 @@ static int emulator_pio_in(struct kvm_vc
}

WARN_ON(count != vcpu->arch.pio.count);
- complete_emulator_pio_in(vcpu, size, port, val);
+ complete_emulator_pio_in(vcpu, val);
return 1;
}