Messages in this thread Patch in this message |  | | Date | Thu, 31 Jan 2013 14:32:14 -0800 | From | tip-bot for Fenghua Yu <> | Subject | [tip:x86/microcode] x86/tlbflush.h: Define __native_flush_tlb_global_irq_disabled() |
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Commit-ID: 086fc8f8037bf16f55f82c66b26a8b834f7349ec Gitweb: http://git.kernel.org/tip/086fc8f8037bf16f55f82c66b26a8b834f7349ec Author: Fenghua Yu <fenghua.yu@intel.com> AuthorDate: Thu, 20 Dec 2012 23:44:27 -0800 Committer: H. Peter Anvin <hpa@linux.intel.com> CommitDate: Thu, 31 Jan 2013 13:19:16 -0800
x86/tlbflush.h: Define __native_flush_tlb_global_irq_disabled()
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> --- arch/x86/include/asm/tlbflush.h | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h index 0fee48e..50a7fc0 100644 --- a/arch/x86/include/asm/tlbflush.h +++ b/arch/x86/include/asm/tlbflush.h @@ -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); }
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