diff options
Diffstat (limited to 'arch/x86/include/asm/system_64.h')
-rw-r--r-- | arch/x86/include/asm/system_64.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/x86/include/asm/system_64.h b/arch/x86/include/asm/system_64.h new file mode 100644 index 00000000000..5aedb8bffc5 --- /dev/null +++ b/arch/x86/include/asm/system_64.h | |||
@@ -0,0 +1,22 @@ | |||
1 | #ifndef ASM_X86__SYSTEM_64_H | ||
2 | #define ASM_X86__SYSTEM_64_H | ||
3 | |||
4 | #include <asm/segment.h> | ||
5 | #include <asm/cmpxchg.h> | ||
6 | |||
7 | |||
8 | static inline unsigned long read_cr8(void) | ||
9 | { | ||
10 | unsigned long cr8; | ||
11 | asm volatile("movq %%cr8,%0" : "=r" (cr8)); | ||
12 | return cr8; | ||
13 | } | ||
14 | |||
15 | static inline void write_cr8(unsigned long val) | ||
16 | { | ||
17 | asm volatile("movq %0,%%cr8" :: "r" (val) : "memory"); | ||
18 | } | ||
19 | |||
20 | #include <linux/irqflags.h> | ||
21 | |||
22 | #endif /* ASM_X86__SYSTEM_64_H */ | ||