diff options
Diffstat (limited to 'include/asm-x86/processor.h')
| -rw-r--r-- | include/asm-x86/processor.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/asm-x86/processor.h b/include/asm-x86/processor.h index 8d0af7bf090a..8b7794766884 100644 --- a/include/asm-x86/processor.h +++ b/include/asm-x86/processor.h @@ -78,6 +78,24 @@ static inline void native_set_debugreg(int regno, unsigned long value) } } +/* + * Set IOPL bits in EFLAGS from given mask + */ +static inline void native_set_iopl_mask(unsigned mask) +{ +#ifdef CONFIG_X86_32 + unsigned int reg; + __asm__ __volatile__ ("pushfl;" + "popl %0;" + "andl %1, %0;" + "orl %2, %0;" + "pushl %0;" + "popfl" + : "=&r" (reg) + : "i" (~X86_EFLAGS_IOPL), "r" (mask)); +#endif +} + #ifndef CONFIG_PARAVIRT #define __cpuid native_cpuid @@ -91,6 +109,7 @@ static inline void native_set_debugreg(int regno, unsigned long value) #define set_debugreg(value, register) \ native_set_debugreg(register, value) +#define set_iopl_mask native_set_iopl_mask #endif /* CONFIG_PARAVIRT */ /* |