x86: provide read and write cr8 paravirt hooks
Since the cr8 manipulation functions ended up staying in the tree,
they can't be defined just when PARAVIRT is off: In this patch,
those functions are defined for the PARAVIRT case too.
[ mingo@elte.hu: fixes ]
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/asm-x86/system.h b/include/asm-x86/system.h
index 39474f2..ee32ef9 100644
--- a/include/asm-x86/system.h
+++ b/include/asm-x86/system.h
@@ -231,6 +231,20 @@
asm volatile("mov %0,%%cr4": :"r" (val), "m" (__force_order));
}
+#ifdef CONFIG_X86_64
+static inline unsigned long native_read_cr8(void)
+{
+ unsigned long cr8;
+ asm volatile("movq %%cr8,%0" : "=r" (cr8));
+ return cr8;
+}
+
+static inline void native_write_cr8(unsigned long val)
+{
+ asm volatile("movq %0,%%cr8" :: "r" (val) : "memory");
+}
+#endif
+
static inline void native_wbinvd(void)
{
asm volatile("wbinvd": : :"memory");
@@ -248,21 +262,9 @@
#define read_cr4_safe() (native_read_cr4_safe())
#define write_cr4(x) (native_write_cr4(x))
#define wbinvd() (native_wbinvd())
-
#ifdef CONFIG_X86_64
-
-static inline unsigned long read_cr8(void)
-{
- unsigned long cr8;
- asm volatile("movq %%cr8,%0" : "=r" (cr8));
- return cr8;
-}
-
-static inline void write_cr8(unsigned long val)
-{
- asm volatile("movq %0,%%cr8" :: "r" (val) : "memory");
-}
-
+#define read_cr8() (native_read_cr8())
+#define write_cr8(x) (native_write_cr8(x))
#endif
/* Clear the 'TS' bit */