[RFC PATCH 06/18] KVM: x86: Add emulator_is_guest_mode()

[Sean Christopherson <sean.j.christopherson@xxxxxxxxx>]

Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
---
 arch/x86/include/asm/kvm_emulate.h |  1 +
 arch/x86/kvm/emulate.c             | 10 +++++-----
 arch/x86/kvm/x86.c                 |  6 ++++++
 3 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h
index 437ba2cc29f5..b76a79febd6a 100644
--- a/arch/x86/include/asm/kvm_emulate.h
+++ b/arch/x86/include/asm/kvm_emulate.h
@@ -223,6 +223,7 @@ struct x86_emulate_ops {
 	void (*set_nmi_mask)(struct x86_emulate_ctxt *ctxt, bool masked);
 
 	unsigned (*get_hflags)(struct x86_emulate_ctxt *ctxt);
+	bool (*is_guest_mode)(struct x86_emulate_ctxt *ctxt);
 	bool (*is_smm)(struct x86_emulate_ctxt *ctxt);
 	int (*leave_smm)(struct x86_emulate_ctxt *ctxt);
 
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 1c0c901db893..874b7460ad75 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -5150,7 +5150,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 	const struct x86_emulate_ops *ops = ctxt->ops;
 	int rc = X86EMUL_CONTINUE;
 	int saved_dst_type = ctxt->dst.type;
-	unsigned emul_flags;
+	bool guest_mode;
 
 	ctxt->mem_read.pos = 0;
 
@@ -5165,7 +5165,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 		goto done;
 	}
 
-	emul_flags = ctxt->ops->get_hflags(ctxt);
+	guest_mode = ctxt->ops->is_guest_mode(ctxt);
 	if (unlikely(ctxt->d &
 		     (No64|Undefined|Sse|Mmx|Intercept|CheckPerm|Priv|Prot|String))) {
 		if ((ctxt->mode == X86EMUL_MODE_PROT64 && (ctxt->d & No64)) ||
@@ -5199,7 +5199,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 				fetch_possible_mmx_operand(ctxt, &ctxt->dst);
 		}
 
-		if (unlikely(emul_flags & X86EMUL_GUEST_MASK) && ctxt->intercept) {
+		if (unlikely(guest_mode) && ctxt->intercept) {
 			rc = emulator_check_intercept(ctxt, ctxt->intercept,
 						      X86_ICPT_PRE_EXCEPT);
 			if (rc != X86EMUL_CONTINUE)
@@ -5228,7 +5228,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 				goto done;
 		}
 
-		if (unlikely(emul_flags & X86EMUL_GUEST_MASK) && (ctxt->d & Intercept)) {
+		if (unlikely(guest_mode) && (ctxt->d & Intercept)) {
 			rc = emulator_check_intercept(ctxt, ctxt->intercept,
 						      X86_ICPT_POST_EXCEPT);
 			if (rc != X86EMUL_CONTINUE)
@@ -5282,7 +5282,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 
 special_insn:
 
-	if (unlikely(emul_flags & X86EMUL_GUEST_MASK) && (ctxt->d & Intercept)) {
+	if (unlikely(guest_mode) && (ctxt->d & Intercept)) {
 		rc = emulator_check_intercept(ctxt, ctxt->intercept,
 					      X86_ICPT_POST_MEMACCESS);
 		if (rc != X86EMUL_CONTINUE)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 0c7b959d7dc6..957bd9371561 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5943,6 +5943,11 @@ static unsigned emulator_get_hflags(struct x86_emulate_ctxt *ctxt)
 	return emul_to_vcpu(ctxt)->arch.hflags;
 }
 
+static bool emulator_is_guest_mode(struct x86_emulate_ctxt *ctxt)
+{
+	return emul_to_vcpu(ctxt)->arch.hflags & HF_GUEST_MASK;
+}
+
 static bool emulator_is_smm(struct x86_emulate_ctxt *ctxt)
 {
 	return emul_to_vcpu(ctxt)->arch.hflags & HF_SMM_MASK;
@@ -5989,6 +5994,7 @@ static const struct x86_emulate_ops emulate_ops = {
 	.get_cpuid           = emulator_get_cpuid,
 	.set_nmi_mask        = emulator_set_nmi_mask,
 	.get_hflags          = emulator_get_hflags,
+	.is_guest_mode       = emulator_is_guest_mode,
 	.is_smm              = emulator_is_smm,
 	.leave_smm           = emulator_leave_smm,
 };
-- 
2.21.0