linux-kernel - [PATCH 10/16] make emulate_insn receive a vcpu struct.

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Message-Id: <11981576884121-git-send-email-gcosta@redhat.com>
Date:	Thu, 20 Dec 2007 11:33:50 -0200
From:	Glauber de Oliveira Costa <gcosta@...hat.com>
To:	lguest@...abs.org
Cc:	glommer@...il.com, linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, rusty@...tcorp.com.au,
	rostedt@...dmis.org, Glauber de Oliveira Costa <gcosta@...hat.com>
Subject: [PATCH 10/16] make emulate_insn receive a vcpu struct.

emulate_insn() needs to know about current eip, which will be,
in the future, a per-vcpu thing. So in this patch, the function
prototype is modified to receive a vcpu struct

Signed-off-by: Glauber de Oliveira Costa <gcosta@...hat.com>
---
 drivers/lguest/x86/core.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c
index 9bf2213..2fb9cd3 100644
--- a/drivers/lguest/x86/core.c
+++ b/drivers/lguest/x86/core.c
@@ -220,8 +220,9 @@ void lguest_arch_run_guest(struct lguest_vcpu *vcpu)
  * When the Guest uses one of these instructions, we get a trap (General
  * Protection Fault) and come here.  We see if it's one of those troublesome
  * instructions and skip over it.  We return true if we did. */
-static int emulate_insn(struct lguest *lg)
+static int emulate_insn(struct lguest_vcpu *vcpu)
 {
+	struct lguest *lg = vcpu->lg;
 	u8 insn;
 	unsigned int insnlen = 0, in = 0, shift = 0;
 	/* The eip contains the *virtual* address of the Guest's instruction:
@@ -294,7 +295,7 @@ void lguest_arch_handle_trap(struct lguest_vcpu *vcpu)
 		 * instructions which we need to emulate.  If so, we just go
 		 * back into the Guest after we've done it. */
 		if (lg->regs->errcode == 0) {
-			if (emulate_insn(lg))
+			if (emulate_insn(vcpu))
 				return;
 		}
 		break;
-- 
1.5.0.6

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