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x86/mm: Only use tlb_remove_table() for paravirt

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If we don't use paravirt; don't play unnecessary and complicated games
to free page-tables.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Peter Zijlstra
2018-08-22 17:30:16 +02:00
committed by Linus Torvalds
parent fd1102f0aa
commit 48a8b97cfd
9 changed files with 26 additions and 6 deletions
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5
arch/x86/include/asm/paravirt.h
View File

@@ -309,6 +309,11 @@ static inline void flush_tlb_others(const struct cpumask *cpumask,
PVOP_VCALL2(pv_mmu_ops.flush_tlb_others, cpumask, info);
}
static inline void paravirt_tlb_remove_table(struct mmu_gather *tlb, void *table)
{
PVOP_VCALL2(pv_mmu_ops.tlb_remove_table, tlb, table);
}
static inline int paravirt_pgd_alloc(struct mm_struct *mm)
{
return PVOP_CALL1(int, pv_mmu_ops.pgd_alloc, mm);

3
arch/x86/include/asm/paravirt_types.h
View File

@@ -54,6 +54,7 @@ struct desc_struct;
struct task_struct;
struct cpumask;
struct flush_tlb_info;
struct mmu_gather;
/*
* Wrapper type for pointers to code which uses the non-standard
@@ -222,6 +223,8 @@ struct pv_mmu_ops {
void (*flush_tlb_others)(const struct cpumask *cpus,
const struct flush_tlb_info *info);
void (*tlb_remove_table)(struct mmu_gather *tlb, void *table);
/* Hooks for allocating and freeing a pagetable top-level */
int (*pgd_alloc)(struct mm_struct *mm);
void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd);

3
arch/x86/include/asm/tlbflush.h
View File

@@ -552,6 +552,9 @@ extern void arch_tlbbatch_flush(struct arch_tlbflush_unmap_batch *batch);
#ifndef CONFIG_PARAVIRT
#define flush_tlb_others(mask, info) \
native_flush_tlb_others(mask, info)
#define paravirt_tlb_remove_table(tlb, page) \
tlb_remove_page(tlb, (void *)(page))
#endif
#endif /* _ASM_X86_TLBFLUSH_H */