| Message ID | 1430174911-27538-13-git-send-email-sjg@chromium.org |
|---|---|
| State | Superseded |
| Delegated to: | Simon Glass |
| Headers | show |
Hi Simon, On Tue, Apr 28, 2015 at 6:48 AM, Simon Glass <sjg@chromium.org> wrote: > Provide access to this x86 instruction from C code. > > Signed-off-by: Simon Glass <sjg@chromium.org> > --- > > arch/x86/include/asm/cpu.h | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h > index c839291..37aa6b9 100644 > --- a/arch/x86/include/asm/cpu.h > +++ b/arch/x86/include/asm/cpu.h > @@ -151,6 +151,11 @@ static inline int flag_is_changeable_p(uint32_t flag) > return ((f1^f2) & flag) != 0; > } > > +static inline void mfence(void) > +{ > + __asm__ __volatile__("mfence\t\n" : : : "memory"); Do we need "\t\n"? > +} > + > /** > * cpu_enable_paging_pae() - Enable PAE-paging > * > -- Regards, Bin
diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h index c839291..37aa6b9 100644 --- a/arch/x86/include/asm/cpu.h +++ b/arch/x86/include/asm/cpu.h @@ -151,6 +151,11 @@ static inline int flag_is_changeable_p(uint32_t flag) return ((f1^f2) & flag) != 0; } +static inline void mfence(void) +{ + __asm__ __volatile__("mfence\t\n" : : : "memory"); +} + /** * cpu_enable_paging_pae() - Enable PAE-paging *
Provide access to this x86 instruction from C code. Signed-off-by: Simon Glass <sjg@chromium.org> --- arch/x86/include/asm/cpu.h | 5 +++++ 1 file changed, 5 insertions(+)