From 63eca94ca206e342bad4a06a86d8e7eda3053a4e Mon Sep 17 00:00:00 2001 From: Vineet Gupta Date: Fri, 23 Aug 2013 19:16:34 +0530 Subject: ARC: [SMP] ASID allocation -Track a Per CPU ASID counter -mm-per-cpu ASID (multiple threads, or mm migrated around) Signed-off-by: Vineet Gupta --- arch/arc/mm/tlb.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) (limited to 'arch/arc/mm/tlb.c') diff --git a/arch/arc/mm/tlb.c b/arch/arc/mm/tlb.c index 5f53050abf60..db0f0f823980 100644 --- a/arch/arc/mm/tlb.c +++ b/arch/arc/mm/tlb.c @@ -100,7 +100,7 @@ /* A copy of the ASID from the PID reg is kept in asid_cache */ -unsigned int asid_cache = MM_CTXT_FIRST_CYCLE; +DEFINE_PER_CPU(unsigned int, asid_cache) = MM_CTXT_FIRST_CYCLE; /* * Utility Routine to erase a J-TLB entry @@ -274,6 +274,7 @@ noinline void local_flush_tlb_mm(struct mm_struct *mm) void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { + const unsigned int cpu = smp_processor_id(); unsigned long flags; /* If range @start to @end is more than 32 TLB entries deep, @@ -297,9 +298,9 @@ void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, local_irq_save(flags); - if (vma->vm_mm->context.asid != MM_CTXT_NO_ASID) { + if (asid_mm(vma->vm_mm, cpu) != MM_CTXT_NO_ASID) { while (start < end) { - tlb_entry_erase(start | hw_pid(vma->vm_mm)); + tlb_entry_erase(start | hw_pid(vma->vm_mm, cpu)); start += PAGE_SIZE; } } @@ -346,6 +347,7 @@ void local_flush_tlb_kernel_range(unsigned long start, unsigned long end) void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page) { + const unsigned int cpu = smp_processor_id(); unsigned long flags; /* Note that it is critical that interrupts are DISABLED between @@ -353,8 +355,8 @@ void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page) */ local_irq_save(flags); - if (vma->vm_mm->context.asid != MM_CTXT_NO_ASID) { - tlb_entry_erase((page & PAGE_MASK) | hw_pid(vma->vm_mm)); + if (asid_mm(vma->vm_mm, cpu) != MM_CTXT_NO_ASID) { + tlb_entry_erase((page & PAGE_MASK) | hw_pid(vma->vm_mm, cpu)); utlb_invalidate(); } @@ -400,7 +402,7 @@ void create_tlb(struct vm_area_struct *vma, unsigned long address, pte_t *ptep) local_irq_save(flags); - tlb_paranoid_check(vma->vm_mm->context.asid, address); + tlb_paranoid_check(asid_mm(vma->vm_mm, smp_processor_id()), address); address &= PAGE_MASK; -- cgit v1.2.3