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Commit 7a5b4bbf authored by Pavel Tatashin's avatar Pavel Tatashin Committed by David S. Miller
Browse files

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: default avatarPavel Tatashin <pasha.tatashin@oracle.com>
Reviewed-by: default avatarBob Picco <bob.picco@oracle.com>
Reviewed-by: default avatarSteven Sistare <steven.sistare@oracle.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c4415235

arch/sparc/include/asm/mmu_context_64.h

+3 −2
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ extern spinlock_t ctx_alloc_lock; 
extern unsigned long tlb_context_cache;

extern unsigned long mmu_context_bmap[];



DECLARE_PER_CPU(struct mm_struct *, per_cpu_secondary_mm);

void get_new_mmu_context(struct mm_struct *mm);

#ifdef CONFIG_SMP

void smp_new_mmu_context_version(void);
@@ -76,8 +77,9 @@ void __flush_tlb_mm(unsigned long, unsigned long); 
static inline void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm, struct task_struct *tsk)

{

	unsigned long ctx_valid, flags;

	int cpu;

	int cpu = smp_processor_id();



	per_cpu(per_cpu_secondary_mm, cpu) = mm;

	if (unlikely(mm == &init_mm))

		return;
@@ -123,7 +125,6 @@ static inline void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm, str 
	 * for the first time, we must flush that context out of the

	 * local TLB.

	 */

	cpu = smp_processor_id();

	if (!ctx_valid || !cpumask_test_cpu(cpu, mm_cpumask(mm))) {

		cpumask_set_cpu(cpu, mm_cpumask(mm));

		__flush_tlb_mm(CTX_HWBITS(mm->context),

arch/sparc/mm/init_64.c

+1 −0
Original line number Diff line number Diff line
@@ -711,6 +711,7 @@ unsigned long tlb_context_cache = CTX_FIRST_VERSION; 
#define MAX_CTX_NR	(1UL << CTX_NR_BITS)

#define CTX_BMAP_SLOTS	BITS_TO_LONGS(MAX_CTX_NR)

DECLARE_BITMAP(mmu_context_bmap, MAX_CTX_NR);

DEFINE_PER_CPU(struct mm_struct *, per_cpu_secondary_mm) = {0};



/* Caller does TLB context flushing on local CPU if necessary.

 * The caller also ensures that CTX_VALID(mm->context) is false.