sparc64: add per-cpu mm of secondary contexts
The new wrap is going to use information from this array to figure out mm's that currently have valid secondary contexts setup. Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> Reviewed-by: Bob Picco <bob.picco@oracle.com> Reviewed-by: Steven Sistare <steven.sistare@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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c4415235b2
Коммит
7a5b4bbf49
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@ -19,6 +19,7 @@ extern spinlock_t ctx_alloc_lock;
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extern unsigned long tlb_context_cache;
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extern unsigned long mmu_context_bmap[];
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DECLARE_PER_CPU(struct mm_struct *, per_cpu_secondary_mm);
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void get_new_mmu_context(struct mm_struct *mm);
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#ifdef CONFIG_SMP
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void smp_new_mmu_context_version(void);
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@ -76,8 +77,9 @@ void __flush_tlb_mm(unsigned long, unsigned long);
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static inline void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm, struct task_struct *tsk)
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{
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unsigned long ctx_valid, flags;
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int cpu;
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int cpu = smp_processor_id();
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per_cpu(per_cpu_secondary_mm, cpu) = mm;
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if (unlikely(mm == &init_mm))
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return;
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@ -123,7 +125,6 @@ static inline void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm, str
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* for the first time, we must flush that context out of the
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* local TLB.
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*/
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cpu = smp_processor_id();
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if (!ctx_valid || !cpumask_test_cpu(cpu, mm_cpumask(mm))) {
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cpumask_set_cpu(cpu, mm_cpumask(mm));
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__flush_tlb_mm(CTX_HWBITS(mm->context),
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@ -711,6 +711,7 @@ unsigned long tlb_context_cache = CTX_FIRST_VERSION;
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#define MAX_CTX_NR (1UL << CTX_NR_BITS)
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#define CTX_BMAP_SLOTS BITS_TO_LONGS(MAX_CTX_NR)
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DECLARE_BITMAP(mmu_context_bmap, MAX_CTX_NR);
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DEFINE_PER_CPU(struct mm_struct *, per_cpu_secondary_mm) = {0};
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/* Caller does TLB context flushing on local CPU if necessary.
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* The caller also ensures that CTX_VALID(mm->context) is false.
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