#ifndef _ASM_X86_SYSTEM_64_H #define _ASM_X86_SYSTEM_64_H #include #include 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"); } #include #endif /* _ASM_X86_SYSTEM_64_H */