[PATCH 3/4] mm: rmap: Extend tlbbatch APIs to fit new platforms
From: Barry Song <hidden>
Date: 2022-07-07 12:53:57
Also in:
linux-doc, linux-mm, lkml
Subsystem:
memory management, memory management - rmap (reverse mapping), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Andrew Morton, David Hildenbrand, Lorenzo Stoakes, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
From: Barry Song <redacted> Add vma and uaddr to tlbbatch APIs so that platforms like ARM64 are able to apply these two parameters on their specific hard- ware features. For ARM64, this could be sending tlbi into hard- ware queues without waiting for its completion. Cc: Thomas Gleixner <redacted> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Nadav Amit <redacted> Cc: Mel Gorman <mgorman@suse.de> Signed-off-by: Barry Song <redacted> --- arch/x86/include/asm/tlbflush.h | 4 +++- mm/rmap.c | 12 ++++++++---- 2 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h
index 4af5579c7ef7..9fc48c103b31 100644
--- a/arch/x86/include/asm/tlbflush.h
+++ b/arch/x86/include/asm/tlbflush.h@@ -251,7 +251,9 @@ static inline u64 inc_mm_tlb_gen(struct mm_struct *mm) } static inline void arch_tlbbatch_add_mm(struct arch_tlbflush_unmap_batch *batch, - struct mm_struct *mm) + struct mm_struct *mm, + struct vm_area_struct *vma, + unsigned long uaddr) { inc_mm_tlb_gen(mm); cpumask_or(&batch->cpumask, &batch->cpumask, mm_cpumask(mm));
diff --git a/mm/rmap.c b/mm/rmap.c
index d320c29a4ad8..2b5b740d0001 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c@@ -642,12 +642,14 @@ void try_to_unmap_flush_dirty(void) #define TLB_FLUSH_BATCH_PENDING_LARGE \ (TLB_FLUSH_BATCH_PENDING_MASK / 2) -static void set_tlb_ubc_flush_pending(struct mm_struct *mm, bool writable) +static void set_tlb_ubc_flush_pending(struct mm_struct *mm, bool writable, + struct vm_area_struct *vma, + unsigned long uaddr) { struct tlbflush_unmap_batch *tlb_ubc = ¤t->tlb_ubc; int batch, nbatch; - arch_tlbbatch_add_mm(&tlb_ubc->arch, mm); + arch_tlbbatch_add_mm(&tlb_ubc->arch, mm, vma, uaddr); tlb_ubc->flush_required = true; /*
@@ -737,7 +739,9 @@ void flush_tlb_batched_pending(struct mm_struct *mm) } } #else -static void set_tlb_ubc_flush_pending(struct mm_struct *mm, bool writable) +static void set_tlb_ubc_flush_pending(struct mm_struct *mm, bool writable, + struct vm_area_struct *vma, + unsigned long uaddr) { }
@@ -1600,7 +1604,7 @@ static bool try_to_unmap_one(struct folio *folio, struct vm_area_struct *vma, */ pteval = ptep_get_and_clear(mm, address, pvmw.pte); - set_tlb_ubc_flush_pending(mm, pte_dirty(pteval)); + set_tlb_ubc_flush_pending(mm, pte_dirty(pteval), vma, address); } else { pteval = ptep_clear_flush(vma, address, pvmw.pte); }
--
2.25.1
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