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x86/tlbflush.h: Define __native_flush_tlb_global_irq_disabled()

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This function is called in __native_flush_tlb_global() and after
apply_microcode_early().

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1356075872-3054-8-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Fenghua Yu 2012-12-20 23:44:27 -08:00 committed by H. Peter Anvin
parent e666dfa273
commit 086fc8f803
1 changed files with 12 additions and 6 deletions
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18
arch/x86/include/asm/tlbflush.h
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@ -20,10 +20,20 @@ static inline void __native_flush_tlb(void)
native_write_cr3(native_read_cr3());
}
static inline void __native_flush_tlb_global_irq_disabled(void)
{
unsigned long cr4;
cr4 = native_read_cr4();
/* clear PGE */
native_write_cr4(cr4 & ~X86_CR4_PGE);
/* write old PGE again and flush TLBs */
native_write_cr4(cr4);
}
static inline void __native_flush_tlb_global(void)
{
unsigned long flags;
unsigned long cr4;
/*
* Read-modify-write to CR4 - protect it from preemption and
@ -32,11 +42,7 @@ static inline void __native_flush_tlb_global(void)
*/
raw_local_irq_save(flags);
cr4 = native_read_cr4();
/* clear PGE */
native_write_cr4(cr4 & ~X86_CR4_PGE);
/* write old PGE again and flush TLBs */
native_write_cr4(cr4);
__native_flush_tlb_global_irq_disabled();
raw_local_irq_restore(flags);
}