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| author | Glauber de Oliveira Costa <gcosta@redhat.com> | 2008-01-30 13:32:08 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:32:08 +0100 |
| commit | e801f864ec7e5b149bd05337800e419f408523bb (patch) | |
| tree | cdab4ec9635926756f58398469621031a2f34ae4 /include/asm-x86/processor.h | |
| parent | 4a8c4c4e10d1bc2c3bd80caabb6a76a66849f7e8 (diff) | |
| download | lwn-e801f864ec7e5b149bd05337800e419f408523bb.tar.gz lwn-e801f864ec7e5b149bd05337800e419f408523bb.zip | |
x86: adds paravirt hook for swapgs
This patch adds paravirt hook for swapgs operation, which is a privileged
operation in x86_64.
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 | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/asm-x86/processor.h b/include/asm-x86/processor.h index e6fa06fee72a..72740c6f1109 100644 --- a/include/asm-x86/processor.h +++ b/include/asm-x86/processor.h @@ -435,6 +435,13 @@ static inline void native_load_sp0(struct tss_struct *tss, #endif } +static inline void native_swapgs(void) +{ +#ifdef CONFIG_X86_64 + asm volatile("swapgs" ::: "memory"); +#endif +} + #ifdef CONFIG_PARAVIRT #include <asm/paravirt.h> #else @@ -456,6 +463,7 @@ static inline void load_sp0(struct tss_struct *tss, } #define set_iopl_mask native_set_iopl_mask +#define SWAPGS swapgs #endif /* CONFIG_PARAVIRT */ /* |