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authorAlistair Popple <apopple@nvidia.com>2023-07-25 16:42:07 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-08-18 20:12:41 +0300
commit1af5a8109904b7f00828e7f9f63f5695b42f8215 (patch)
tree2f37b095fb84abe7f1429c6714182f8d6b7bee1c /arch/x86
parentec8832d007cb7b50229ad5745eec35b847cc9120 (diff)
downloadlinux-1af5a8109904b7f00828e7f9f63f5695b42f8215.tar.xz
mmu_notifiers: rename invalidate_range notifier
There are two main use cases for mmu notifiers. One is by KVM which uses mmu_notifier_invalidate_range_start()/end() to manage a software TLB. The other is to manage hardware TLBs which need to use the invalidate_range() callback because HW can establish new TLB entries at any time. Hence using start/end() can lead to memory corruption as these callbacks happen too soon/late during page unmap. mmu notifier users should therefore either use the start()/end() callbacks or the invalidate_range() callbacks. To make this usage clearer rename the invalidate_range() callback to arch_invalidate_secondary_tlbs() and update documention. Link: https://lkml.kernel.org/r/6f77248cd25545c8020a54b4e567e8b72be4dca1.1690292440.git-series.apopple@nvidia.com Signed-off-by: Alistair Popple <apopple@nvidia.com> Suggested-by: Jason Gunthorpe <jgg@nvidia.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Cc: Andrew Donnellan <ajd@linux.ibm.com> Cc: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com> Cc: Frederic Barrat <fbarrat@linux.ibm.com> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Kevin Tian <kevin.tian@intel.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Nicolin Chen <nicolinc@nvidia.com> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Sean Christopherson <seanjc@google.com> Cc: SeongJae Park <sj@kernel.org> Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Cc: Will Deacon <will@kernel.org> Cc: Zhi Wang <zhi.wang.linux@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/include/asm/tlbflush.h2
-rw-r--r--arch/x86/mm/tlb.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h
index 0a5432364c5a..6ab42caaa67a 100644
--- a/arch/x86/include/asm/tlbflush.h
+++ b/arch/x86/include/asm/tlbflush.h
@@ -283,7 +283,7 @@ static inline void arch_tlbbatch_add_pending(struct arch_tlbflush_unmap_batch *b
{
inc_mm_tlb_gen(mm);
cpumask_or(&batch->cpumask, &batch->cpumask, mm_cpumask(mm));
- mmu_notifier_invalidate_range(mm, 0, -1UL);
+ mmu_notifier_arch_invalidate_secondary_tlbs(mm, 0, -1UL);
}
static inline void arch_flush_tlb_batched_pending(struct mm_struct *mm)
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index 93b2f81f09da..2d253919b3e8 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -1037,7 +1037,7 @@ void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
put_flush_tlb_info();
put_cpu();
- mmu_notifier_invalidate_range(mm, start, end);
+ mmu_notifier_arch_invalidate_secondary_tlbs(mm, start, end);
}