linux-kernel - [PATCH 5/10] puts read and write cr8 into pv_cpu

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Message-Id: <1200676857691-git-send-email-gcosta@redhat.com>
Date:	Fri, 18 Jan 2008 15:20:20 -0200
From:	Glauber de Oliveira Costa <gcosta@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, glommer@...il.com, tglx@...utronix.de,
	mingo@...e.hu, ehabkost@...hat.com, jeremy@...p.org,
	avi@...ranet.com, anthony@...emonkey.ws,
	virtualization@...ts.linux-foundation.org, rusty@...tcorp.com.au,
	ak@...e.de, chrisw@...s-sol.org, rostedt@...dmis.org,
	hpa@...or.com, zach@...are.com, roland@...hat.com,
	mtosatti@...hat.com, Glauber de Oliveira Costa <gcosta@...hat.com>
Subject: [PATCH 5/10] puts read and write cr8 into pv_cpu_ops

This patch adds room for read and write_cr8 functions back in
pv_cpu_ops struct

Signed-off-by: Glauber de Oliveira Costa <gcosta@...hat.com>
---
 include/asm-x86/paravirt.h |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 7ff25c2..3e7ca42 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -101,6 +101,11 @@ struct pv_cpu_ops {
 	unsigned long (*read_cr4)(void);
 	void (*write_cr4)(unsigned long);
 
+#ifdef CONFIG_X86_64
+	unsigned long (*read_cr8)(void);
+	void (*write_cr8)(unsigned long);
+#endif
+
 	/* Segment descriptor handling */
 	void (*load_tr_desc)(void);
 	void (*load_gdt)(const struct desc_ptr *);
@@ -614,6 +619,16 @@ static inline void write_cr4(unsigned long x)
 	PVOP_VCALL1(pv_cpu_ops.write_cr4, x);
 }
 
+static inline unsigned long read_cr8(void)
+{
+	return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr8);
+}
+
+static inline void write_cr8(unsigned long x)
+{
+	PVOP_VCALL1(pv_cpu_ops.write_cr8, x);
+}
+
 static inline void raw_safe_halt(void)
 {
 	PVOP_VCALL0(pv_irq_ops.safe_halt);
-- 
1.4.4.2

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