KVM: x86: cleanup port-in/port-out emulated

Remove the same code between emulator_pio_in_emulated and
emulator_pio_out_emulated

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 7ba1ab73fd038635a0df3448cc1307b638fe2fd6..a2154487917d5d9a9f8f6adacd043b7262ad625f 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4349,32 +4349,24 @@ static int kernel_pio(struct kvm_vcpu *vcpu, void *pd)
        return r;
 }
 
-
-static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt,
-                                   int size, unsigned short port, void *val,
-                                   unsigned int count)
+static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size,
+                              unsigned short port, void *val,
+                              unsigned int count, bool in)
 {
-       struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
-
-       if (vcpu->arch.pio.count)
-               goto data_avail;
-
-       trace_kvm_pio(0, port, size, count);
+       trace_kvm_pio(!in, port, size, count);
 
        vcpu->arch.pio.port = port;
-       vcpu->arch.pio.in = 1;
+       vcpu->arch.pio.in = in;
        vcpu->arch.pio.count  = count;
        vcpu->arch.pio.size = size;
 
        if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
-       data_avail:
-               memcpy(val, vcpu->arch.pio_data, size * count);
                vcpu->arch.pio.count = 0;
                return 1;
        }
 
        vcpu->run->exit_reason = KVM_EXIT_IO;
-       vcpu->run->io.direction = KVM_EXIT_IO_IN;
+       vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
        vcpu->run->io.size = size;
        vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
        vcpu->run->io.count = count;
@@ -4383,36 +4375,37 @@ static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt,
        return 0;
 }
 
-static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt,
-                                    int size, unsigned short port,
-                                    const void *val, unsigned int count)
+static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt,
+                                   int size, unsigned short port, void *val,
+                                   unsigned int count)
 {
        struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
+       int ret;
 
-       trace_kvm_pio(1, port, size, count);
-
-       vcpu->arch.pio.port = port;
-       vcpu->arch.pio.in = 0;
-       vcpu->arch.pio.count = count;
-       vcpu->arch.pio.size = size;
-
-       memcpy(vcpu->arch.pio_data, val, size * count);
+       if (vcpu->arch.pio.count)
+               goto data_avail;
 
-       if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
+       ret = emulator_pio_in_out(vcpu, size, port, val, count, true);
+       if (ret) {
+data_avail:
+               memcpy(val, vcpu->arch.pio_data, size * count);
                vcpu->arch.pio.count = 0;
                return 1;
        }
 
-       vcpu->run->exit_reason = KVM_EXIT_IO;
-       vcpu->run->io.direction = KVM_EXIT_IO_OUT;
-       vcpu->run->io.size = size;
-       vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
-       vcpu->run->io.count = count;
-       vcpu->run->io.port = port;
-
        return 0;
 }
 
+static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt,
+                                    int size, unsigned short port,
+                                    const void *val, unsigned int count)
+{
+       struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
+
+       memcpy(vcpu->arch.pio_data, val, size * count);
+       return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false);
+}
+
 static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
 {
        return kvm_x86_ops->get_segment_base(vcpu, seg);