Commit-ID: 086fc8f8037bf16f55f82c66b26a8b834f7349ec
Gitweb: http://git.kernel.org/tip/086fc8f8037bf16f55f82c66b26a8b834f7349ec
Author: Fenghua Yu <fenghua.yu@xxxxxxxxx>
AuthorDate: Thu, 20 Dec 2012 23:44:27 -0800
Committer: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
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@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1356075872-3054-8-git-send-email-fenghua.yu@xxxxxxxxx
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
---
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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