KVM: x86 emulator: drop vcpu argument from pio callbacks

Making the emulator caller agnostic.

Signed-off-by: Avi Kivity <avi@redhat.com>

arch/x86/include/asm/kvm_emulate.h

@@ -155,11 +155,13 @@ struct x86_emulate_ops {
 				unsigned int bytes,
 				struct x86_exception *fault);
 
-	int (*pio_in_emulated)(int size, unsigned short port, void *val,
-			       unsigned int count, struct kvm_vcpu *vcpu);
+	int (*pio_in_emulated)(struct x86_emulate_ctxt *ctxt,
+			       int size, unsigned short port, void *val,
+			       unsigned int count);
 
-	int (*pio_out_emulated)(int size, unsigned short port, const void *val,
-				unsigned int count, struct kvm_vcpu *vcpu);
+	int (*pio_out_emulated)(struct x86_emulate_ctxt *ctxt,
+				int size, unsigned short port, const void *val,
+				unsigned int count);
 
 	bool (*get_cached_descriptor)(struct desc_struct *desc, u32 *base3,
 				      int seg, struct kvm_vcpu *vcpu);

arch/x86/kvm/emulate.c

@@ -1125,7 +1125,7 @@ static int pio_in_emulated(struct x86_emulate_ctxt *ctxt,
 		if (n == 0)
 			n = 1;
 		rc->pos = rc->end = 0;
-		if (!ops->pio_in_emulated(size, port, rc->data, n, ctxt->vcpu))
+		if (!ops->pio_in_emulated(ctxt, size, port, rc->data, n))
 			return 0;
 		rc->end = n * size;
 	}
@@ -3892,8 +3892,8 @@ special_insn:
 	case 0xef: /* out dx,(e/r)ax */
 		c->dst.val = c->regs[VCPU_REGS_RDX];
 	do_io_out:
-		ops->pio_out_emulated(c->src.bytes, c->dst.val,
-				      &c->src.val, 1, ctxt->vcpu);
+		ops->pio_out_emulated(ctxt, c->src.bytes, c->dst.val,
+				      &c->src.val, 1);
 		c->dst.type = OP_NONE;	/* Disable writeback. */
 		break;
 	case 0xf4:              /* hlt */

arch/x86/kvm/x86.c

@@ -4060,9 +4060,12 @@ static int kernel_pio(struct kvm_vcpu *vcpu, void *pd)
 }
 
 
-static int emulator_pio_in_emulated(int size, unsigned short port, void *val,
-			     unsigned int count, struct kvm_vcpu *vcpu)
+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);
+
 	if (vcpu->arch.pio.count)
 		goto data_avail;
 
@@ -4090,10 +4093,12 @@ static int emulator_pio_in_emulated(int size, unsigned short port, void *val,
 	return 0;
 }
 
-static int emulator_pio_out_emulated(int size, unsigned short port,
-			      const void *val, unsigned int count,
-			      struct kvm_vcpu *vcpu)
+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);
+
 	trace_kvm_pio(1, port, size, count);
 
 	vcpu->arch.pio.port = port;
@@ -4614,7 +4619,8 @@ EXPORT_SYMBOL_GPL(x86_emulate_instruction);
 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port)
 {
 	unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX);
-	int ret = emulator_pio_out_emulated(size, port, &val, 1, vcpu);
+	int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt,
+					    size, port, &val, 1);
 	/* do not return to emulator after return from userspace */
 	vcpu->arch.pio.count = 0;
 	return ret;