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| author | Brian Gerst <brgerst@gmail.com> | 2009-01-19 00:38:57 +0900 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2009-01-19 00:38:57 +0900 |
| commit | 9eb912d1aa6b8106e06a73ea6702ec3dab0d6a1a (patch) | |
| tree | ed563ea82e5190894806c62d87a769400b08375a /arch/x86/include/asm | |
| parent | 1b437c8c73a36daa471dd54a63c426d72af5723d (diff) | |
| download | talos-obmc-linux-9eb912d1aa6b8106e06a73ea6702ec3dab0d6a1a.tar.gz talos-obmc-linux-9eb912d1aa6b8106e06a73ea6702ec3dab0d6a1a.zip | |
x86-64: Move TLB state from PDA to per-cpu and consolidate with 32-bit.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/mmu_context_64.h | 16 | ||||
| -rw-r--r-- | arch/x86/include/asm/pda.h | 2 | ||||
| -rw-r--r-- | arch/x86/include/asm/tlbflush.h | 7 |
3 files changed, 9 insertions, 16 deletions
diff --git a/arch/x86/include/asm/mmu_context_64.h b/arch/x86/include/asm/mmu_context_64.h index 677d36e9540a..c4572505ab3e 100644 --- a/arch/x86/include/asm/mmu_context_64.h +++ b/arch/x86/include/asm/mmu_context_64.h @@ -1,13 +1,11 @@ #ifndef _ASM_X86_MMU_CONTEXT_64_H #define _ASM_X86_MMU_CONTEXT_64_H -#include <asm/pda.h> - static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) { #ifdef CONFIG_SMP - if (read_pda(mmu_state) == TLBSTATE_OK) - write_pda(mmu_state, TLBSTATE_LAZY); + if (percpu_read(cpu_tlbstate.state) == TLBSTATE_OK) + percpu_write(cpu_tlbstate.state, TLBSTATE_LAZY); #endif } @@ -19,8 +17,8 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, /* stop flush ipis for the previous mm */ cpu_clear(cpu, prev->cpu_vm_mask); #ifdef CONFIG_SMP - write_pda(mmu_state, TLBSTATE_OK); - write_pda(active_mm, next); + percpu_write(cpu_tlbstate.state, TLBSTATE_OK); + percpu_write(cpu_tlbstate.active_mm, next); #endif cpu_set(cpu, next->cpu_vm_mask); load_cr3(next->pgd); @@ -30,9 +28,9 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, } #ifdef CONFIG_SMP else { - write_pda(mmu_state, TLBSTATE_OK); - if (read_pda(active_mm) != next) - BUG(); + percpu_write(cpu_tlbstate.state, TLBSTATE_OK); + BUG_ON(percpu_read(cpu_tlbstate.active_mm) != next); + if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) { /* We were in lazy tlb mode and leave_mm disabled * tlb flush IPI delivery. We must reload CR3 diff --git a/arch/x86/include/asm/pda.h b/arch/x86/include/asm/pda.h index 69a40757e217..8ee835ed10e1 100644 --- a/arch/x86/include/asm/pda.h +++ b/arch/x86/include/asm/pda.h @@ -25,9 +25,7 @@ struct x8664_pda { char *irqstackptr; short nodenumber; /* number of current node (32k max) */ short in_bootmem; /* pda lives in bootmem */ - short mmu_state; short isidle; - struct mm_struct *active_mm; } ____cacheline_aligned_in_smp; DECLARE_PER_CPU(struct x8664_pda, __pda); diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h index 17feaa9c7e76..d3539f998f88 100644 --- a/arch/x86/include/asm/tlbflush.h +++ b/arch/x86/include/asm/tlbflush.h @@ -148,20 +148,17 @@ void native_flush_tlb_others(const struct cpumask *cpumask, #define TLBSTATE_OK 1 #define TLBSTATE_LAZY 2 -#ifdef CONFIG_X86_32 struct tlb_state { struct mm_struct *active_mm; int state; - char __cacheline_padding[L1_CACHE_BYTES-8]; }; DECLARE_PER_CPU(struct tlb_state, cpu_tlbstate); -void reset_lazy_tlbstate(void); -#else static inline void reset_lazy_tlbstate(void) { + percpu_write(cpu_tlbstate.state, 0); + percpu_write(cpu_tlbstate.active_mm, &init_mm); } -#endif #endif /* SMP */ |
