linux-kernel - [PATCH v4 1/3] mm: Add update_mmu_tlb

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Message-Id: <20240522061204.117421-2-libang.li@antgroup.com>
Date: Wed, 22 May 2024 14:12:02 +0800
From: "Bang Li" <libang.li@...group.com>
To: akpm@...ux-foundation.org,
	chenhuacai@...nel.org,
	tsbogend@...ha.franken.de,
	paul.walmsley@...ive.com,
	palmer@...belt.com,
	chris@...kel.net,
	jcmvbkbc@...il.com
Cc:  <linux-kernel@...r.kernel.org>,
   <linux-mm@...ck.org>,
   <loongarch@...ts.linux.dev>,
   <linux-riscv@...ts.infradead.org>,
   <david@...hat.com>,
   <ryan.roberts@....com>,
   <ioworker0@...il.com>,
   <libang.linux@...il.com>,
  "Bang Li" <libang.li@...group.com>
Subject: [PATCH v4 1/3] mm: Add update_mmu_tlb_range()

Added update_mmu_tlb_range(), we can batch update tlb of an
address range.

Signed-off-by: Bang Li <libang.li@...group.com>
---
 arch/loongarch/include/asm/pgtable.h | 2 ++
 arch/mips/include/asm/pgtable.h      | 2 ++
 arch/riscv/include/asm/pgtable.h     | 2 ++
 arch/xtensa/include/asm/pgtable.h    | 3 +++
 arch/xtensa/mm/tlb.c                 | 6 ++++++
 include/linux/pgtable.h              | 7 +++++++
 6 files changed, 22 insertions(+)

diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h
index af3acdf3481a..5ccc2a3a6f7a 100644
--- a/arch/loongarch/include/asm/pgtable.h
+++ b/arch/loongarch/include/asm/pgtable.h
@@ -469,6 +469,8 @@ static inline void update_mmu_cache_range(struct vm_fault *vmf,
 
 #define __HAVE_ARCH_UPDATE_MMU_TLB
 #define update_mmu_tlb	update_mmu_cache
+#define update_mmu_tlb_range(vma, addr, ptep, nr) \
+	update_mmu_cache_range(NULL, vma, addr, ptep, nr)
 
 static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
 			unsigned long address, pmd_t *pmdp)
diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h
index e27a4c83c548..0891ad7d43b6 100644
--- a/arch/mips/include/asm/pgtable.h
+++ b/arch/mips/include/asm/pgtable.h
@@ -596,6 +596,8 @@ static inline void update_mmu_cache_range(struct vm_fault *vmf,
 
 #define	__HAVE_ARCH_UPDATE_MMU_TLB
 #define update_mmu_tlb	update_mmu_cache
+#define update_mmu_tlb_range(vma, address, ptep, nr) \
+	update_mmu_cache_range(NULL, vma, address, ptep, nr)
 
 static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
 	unsigned long address, pmd_t *pmdp)
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 55a7c3ec246b..4630815b0253 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -491,6 +491,8 @@ static inline void update_mmu_cache_range(struct vm_fault *vmf,
 
 #define __HAVE_ARCH_UPDATE_MMU_TLB
 #define update_mmu_tlb update_mmu_cache
+#define update_mmu_tlb_range(vma, addr, ptep, nr) \
+	update_mmu_cache_range(NULL, vma, addr, ptep, nr)
 
 static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
 		unsigned long address, pmd_t *pmdp)
diff --git a/arch/xtensa/include/asm/pgtable.h b/arch/xtensa/include/asm/pgtable.h
index 9a7e5e57ee9a..436158bd9030 100644
--- a/arch/xtensa/include/asm/pgtable.h
+++ b/arch/xtensa/include/asm/pgtable.h
@@ -413,6 +413,9 @@ typedef pte_t *pte_addr_t;
 void update_mmu_tlb(struct vm_area_struct *vma,
 		    unsigned long address, pte_t *ptep);
 #define __HAVE_ARCH_UPDATE_MMU_TLB
+void update_mmu_tlb_range(struct vm_area_struct *vma,
+		unsigned long address, pte_t *ptep, unsigned int nr);
+#define update_mmu_tlb_range update_mmu_tlb_range
 
 #endif /* !defined (__ASSEMBLY__) */
 
diff --git a/arch/xtensa/mm/tlb.c b/arch/xtensa/mm/tlb.c
index d8b60d6e50a8..05efba86b870 100644
--- a/arch/xtensa/mm/tlb.c
+++ b/arch/xtensa/mm/tlb.c
@@ -169,6 +169,12 @@ void update_mmu_tlb(struct vm_area_struct *vma,
 	local_flush_tlb_page(vma, address);
 }
 
+void update_mmu_tlb_range(struct vm_area_struct *vma,
+			unsigned long address, pte_t *ptep, unsigned int nr)
+{
+	local_flush_tlb_range(vma, address, address + PAGE_SIZE * nr);
+}
+
 #ifdef CONFIG_DEBUG_TLB_SANITY
 
 static unsigned get_pte_for_vaddr(unsigned vaddr)
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index 18019f037bae..17d1caee39ab 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -729,6 +729,13 @@ static inline void clear_full_ptes(struct mm_struct *mm, unsigned long addr,
  * fault. This function updates TLB only, do nothing with cache or others.
  * It is the difference with function update_mmu_cache.
  */
+#ifndef update_mmu_tlb_range
+static inline void update_mmu_tlb_range(struct vm_area_struct *vma,
+				unsigned long address, pte_t *ptep, unsigned int nr)
+{
+}
+#endif
+
 #ifndef __HAVE_ARCH_UPDATE_MMU_TLB
 static inline void update_mmu_tlb(struct vm_area_struct *vma,
 				unsigned long address, pte_t *ptep)
-- 
2.19.1.6.gb485710b