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authorPeter Zijlstra <peterz@infradead.org>2018-08-22 17:30:16 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-23 11:56:31 -0700
commit48a8b97cfd804a965fbbe7be2d56a7984ef6bdb1 (patch)
tree4c83ec53b89bf5f05a6e65f7b332ac1ab4ef0983 /arch/x86/include
parentfd1102f0aadec7d18792b132e1d224290b2aecca (diff)
download96b-common-48a8b97cfd804a965fbbe7be2d56a7984ef6bdb1.tar.gz
x86/mm: Only use tlb_remove_table() for paravirt
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>
Diffstat (limited to 'arch/x86/include')
-rw-r--r--arch/x86/include/asm/paravirt.h5
-rw-r--r--arch/x86/include/asm/paravirt_types.h3
-rw-r--r--arch/x86/include/asm/tlbflush.h3
3 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index d49bbf4bb5c8..e375d4266b53 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -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);
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 180bc0bff0fb..4b75acc23b30 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -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);
diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h
index 6690cd3fc8b1..29c9da6c62fc 100644
--- a/arch/x86/include/asm/tlbflush.h
+++ b/arch/x86/include/asm/tlbflush.h
@@ -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 */