linux-kernel - [RFC PATCH v2 2/6] KVM: emulate: Remove ctxt->intercept and ctxt->check

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Date:	Thu, 10 Apr 2014 20:03:28 -0400
From:	Bandan Das <bsd@...hat.com>
To:	kvm@...r.kernel.org
Cc:	Marcelo Tosatti <mtosatti@...hat.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Gleb Natapov <gleb@...nel.org>, linux-kernel@...r.kernel.org
Subject: [RFC PATCH v2 2/6] KVM: emulate: Remove ctxt->intercept and ctxt->check_perm checks

The same information can be gleaned from ctxt->d and avoids having
to zero/NULL initialize intercept and check_perm

Signed-off-by: Bandan Das <bsd@...hat.com>
---
 arch/x86/kvm/emulate.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 8e2b866..a6d9892 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -4615,7 +4615,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 				fetch_possible_mmx_operand(ctxt, &ctxt->dst);
 		}
 
-		if (unlikely(ctxt->guest_mode) && ctxt->intercept) {
+		if (unlikely(ctxt->guest_mode) && (ctxt->d & Intercept)) {
 			rc = emulator_check_intercept(ctxt, ctxt->intercept,
 						      X86_ICPT_PRE_EXCEPT);
 			if (rc != X86EMUL_CONTINUE)
@@ -4635,13 +4635,13 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 		}
 
 		/* Do instruction specific permission checks */
-		if (ctxt->check_perm) {
+		if (ctxt->d & CheckPerm) {
 			rc = ctxt->check_perm(ctxt);
 			if (rc != X86EMUL_CONTINUE)
 				goto done;
 		}
 
-		if (unlikely(ctxt->guest_mode) && ctxt->intercept) {
+		if (unlikely(ctxt->guest_mode) && (ctxt->d & Intercept)) {
 			rc = emulator_check_intercept(ctxt, ctxt->intercept,
 						      X86_ICPT_POST_EXCEPT);
 			if (rc != X86EMUL_CONTINUE)
@@ -4685,7 +4685,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 
 special_insn:
 
-	if (unlikely(ctxt->guest_mode) && ctxt->intercept) {
+	if (unlikely(ctxt->guest_mode) && (ctxt->d & Intercept)) {
 		rc = emulator_check_intercept(ctxt, ctxt->intercept,
 					      X86_ICPT_POST_MEMACCESS);
 		if (rc != X86EMUL_CONTINUE)
-- 
1.8.3.1

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