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| author | Glauber de Oliveira Costa | 2008-01-30 13:31:27 +0100 |
|---|---|---|
| committer | Ingo Molnar | 2008-01-30 13:31:27 +0100 |
| commit | 62d7d7ed11760a0fea40e4fc6f0553e721d00443 (patch) | |
| tree | 8d298b4117765d7ab0be92673e134295a9c19c27 /include/asm-x86/processor.h | |
| parent | x86: unify paravirt pieces of processor.h (diff) | |
| download | kernel-qcow2-linux-62d7d7ed11760a0fea40e4fc6f0553e721d00443.tar.gz kernel-qcow2-linux-62d7d7ed11760a0fea40e4fc6f0553e721d00443.tar.xz kernel-qcow2-linux-62d7d7ed11760a0fea40e4fc6f0553e721d00443.zip | |
x86: move the definition of set_iopl_mask to common header
This patch moves the definition of set_iopl_mask to processor.h,
instead of letting it at processor_32.h.
For x86_64, nothing is done, as we don't really need such a function.
However, having it on both arches saves us from putting an ifdef in the
pv_cpu_ops struct.
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>
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 */ /* |