KVM: x86 emulator: Rename 'cr2' to 'memop'

Previous patches have removed the dependency on cr2; we can now stop passing
it to the emulator and rename uses to 'memop'.
Signed-off-by: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

drivers/kvm/x86.c

@@ -1702,7 +1702,6 @@ int emulate_instruction(struct kvm_vcpu *vcpu,
 
 		vcpu->emulate_ctxt.vcpu = vcpu;
 		vcpu->emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
-		vcpu->emulate_ctxt.cr2 = cr2;
 		vcpu->emulate_ctxt.mode =
 			(vcpu->emulate_ctxt.eflags & X86_EFLAGS_VM)
 			? X86EMUL_MODE_REAL : cs_l

drivers/kvm/x86_emulate.c

@@ -1127,13 +1127,13 @@ static inline int emulate_grp45(struct x86_emulate_ctxt *ctxt,
 
 static inline int emulate_grp9(struct x86_emulate_ctxt *ctxt,
 			       struct x86_emulate_ops *ops,
-			       unsigned long cr2)
+			       unsigned long memop)
 {
 	struct decode_cache *c = &ctxt->decode;
 	u64 old, new;
 	int rc;
 
-	rc = ops->read_emulated(cr2, &old, 8, ctxt->vcpu);
+	rc = ops->read_emulated(memop, &old, 8, ctxt->vcpu);
 	if (rc != 0)
 		return rc;
 
@@ -1148,7 +1148,7 @@ static inline int emulate_grp9(struct x86_emulate_ctxt *ctxt,
 		new = ((u64)c->regs[VCPU_REGS_RCX] << 32) |
 		       (u32) c->regs[VCPU_REGS_RBX];
 
-		rc = ops->cmpxchg_emulated(cr2, &old, &new, 8, ctxt->vcpu);
+		rc = ops->cmpxchg_emulated(memop, &old, &new, 8, ctxt->vcpu);
 		if (rc != 0)
 			return rc;
 		ctxt->eflags |= EFLG_ZF;
@@ -1211,7 +1211,7 @@ static inline int writeback(struct x86_emulate_ctxt *ctxt,
 int
 x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
 {
-	unsigned long cr2 = ctxt->cr2;
+	unsigned long memop = 0;
 	u64 msr_data;
 	unsigned long saved_eip = 0;
 	struct decode_cache *c = &ctxt->decode;
@@ -1226,10 +1226,10 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
 	saved_eip = c->eip;
 
 	if (((c->d & ModRM) && (c->modrm_mod != 3)) || (c->d & MemAbs))
-		cr2 = c->modrm_ea;
+		memop = c->modrm_ea;
 
 	if (c->src.type == OP_MEM) {
-		c->src.ptr = (unsigned long *)cr2;
+		c->src.ptr = (unsigned long *)memop;
 		c->src.val = 0;
 		rc = ops->read_emulated((unsigned long)c->src.ptr,
 					&c->src.val,
@@ -1245,7 +1245,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
 
 
 	if (c->dst.type == OP_MEM) {
-		c->dst.ptr = (unsigned long *)cr2;
+		c->dst.ptr = (unsigned long *)memop;
 		c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes;
 		c->dst.val = 0;
 		if (c->d & BitOp) {
@@ -1677,7 +1677,7 @@ twobyte_insn:
 						  &ctxt->eflags);
 			break;
 		case 7: /* invlpg*/
-			emulate_invlpg(ctxt->vcpu, cr2);
+			emulate_invlpg(ctxt->vcpu, memop);
 			break;
 		default:
 			goto cannot_emulate;
@@ -1848,7 +1848,7 @@ twobyte_special_insn:
 		break;
 	}
 	case 0xc7:		/* Grp9 (cmpxchg8b) */
-		rc = emulate_grp9(ctxt, ops, cr2);
+		rc = emulate_grp9(ctxt, ops, memop);
 		if (rc != 0)
 			goto done;
 		break;

drivers/kvm/x86_emulate.h

@@ -145,7 +145,6 @@ struct x86_emulate_ctxt {
 
 	/* Linear faulting address (if emulating a page-faulting instruction). */
 	unsigned long eflags;
-	unsigned long cr2;
 
 	/* Emulated execution mode, represented by an X86EMUL_MODE value. */
 	int mode;