linux-kernel - [PATCH v1 4/5] xtensa: Add update_mmu_tlb

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Date: Mon, 29 Apr 2024 18:33:45 +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:  <david@...hat.com>,
   <ryan.roberts@....com>,
   <libang.linux@...il.com>,
   <ioworker0@...il.com>,
   <linux-kernel@...r.kernel.org>,
   <linux-mm@...ck.org>,
   <loongarch@...ts.linux.dev>,
   <linux-mips@...r.kernel.org>,
   <linux-riscv@...ts.infradead.org>,
  "Bang Li" <libang.li@...group.com>
Subject: [PATCH v1 4/5] xtensa: Add update_mmu_tlb_range()

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

Signed-off-by: Bang Li <libang.li@...group.com>
---
 arch/xtensa/include/asm/pgtable.h | 2 ++
 arch/xtensa/mm/tlb.c              | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/arch/xtensa/include/asm/pgtable.h b/arch/xtensa/include/asm/pgtable.h
index 9a7e5e57ee9a..50ccfc988256 100644
--- a/arch/xtensa/include/asm/pgtable.h
+++ b/arch/xtensa/include/asm/pgtable.h
@@ -412,6 +412,8 @@ typedef pte_t *pte_addr_t;
 
 void update_mmu_tlb(struct vm_area_struct *vma,
 		    unsigned long address, pte_t *ptep);
+void update_mmu_tlb_range(struct vm_area_struct *vma,
+			unsigned long address, pte_t *ptep, unsigned int nr);
 #define __HAVE_ARCH_UPDATE_MMU_TLB
 
 #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)
-- 
2.19.1.6.gb485710b