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From: Zhenyu Ye <yezhenyu2@huawei.com>
To: <peterz@infradead.org>, <mark.rutland@arm.com>, <will@kernel.org>,
	<catalin.marinas@arm.com>, <aneesh.kumar@linux.ibm.com>,
	<akpm@linux-foundation.org>, <npiggin@gmail.com>, <arnd@arndb.de>,
	<rostedt@goodmis.org>, <maz@kernel.org>, <suzuki.poulose@arm.com>,
	<tglx@linutronix.de>, <yuzhao@google.com>, <Dave.Martin@arm.com>,
	<steven.price@arm.com>, <broonie@kernel.org>,
	<guohanjun@huawei.com>
Cc: <yezhenyu2@huawei.com>, <linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <linux-arch@vger.kernel.org>,
	<linux-mm@kvack.org>, <arm@kernel.org>, <xiexiangyou@huawei.com>,
	<prime.zeng@hisilicon.com>, <zhangshaokun@hisilicon.com>,
	<kuhn.chenqun@huawei.com>
Subject: [PATCH v1 5/6] mm: tlb: Provide flush_*_tlb_range wrappers
Date: Fri, 3 Apr 2020 17:00:47 +0800	[thread overview]
Message-ID: <20200403090048.938-6-yezhenyu2@huawei.com> (raw)
In-Reply-To: <20200403090048.938-1-yezhenyu2@huawei.com>

This patch provides flush_{pte|pmd|pud|p4d}_tlb_range() in generic
code, which are expressed through the mmu_gather APIs.  These
interface set tlb->cleared_* and finally call tlb_flush(), so we
can do the tlb invalidation according to the information in
struct mmu_gather.

Signed-off-by: Zhenyu Ye <yezhenyu2@huawei.com>
---
 include/asm-generic/pgtable.h | 12 +++++++--
 mm/pgtable-generic.c          | 50 +++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+), 2 deletions(-)

diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index e2e2bef07dd2..2bedeee94131 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -1160,11 +1160,19 @@ static inline int pmd_free_pte_page(pmd_t *pmd, unsigned long addr)
  * invalidate the entire TLB which is not desitable.
  * e.g. see arch/arc: flush_pmd_tlb_range
  */
-#define flush_pmd_tlb_range(vma, addr, end)	flush_tlb_range(vma, addr, end)
-#define flush_pud_tlb_range(vma, addr, end)	flush_tlb_range(vma, addr, end)
+extern void flush_pte_tlb_range(struct vm_area_struct *vma,
+				unsigned long addr, unsigned long end);
+extern void flush_pmd_tlb_range(struct vm_area_struct *vma,
+				unsigned long addr, unsigned long end);
+extern void flush_pud_tlb_range(struct vm_area_struct *vma,
+				unsigned long addr, unsigned long end);
+extern void flush_p4d_tlb_range(struct vm_area_struct *vma,
+				unsigned long addr, unsigned long end);
 #else
+#define flush_pte_tlb_range(vma, addr, end)	BUILD_BUG()
 #define flush_pmd_tlb_range(vma, addr, end)	BUILD_BUG()
 #define flush_pud_tlb_range(vma, addr, end)	BUILD_BUG()
+#define flush_p4d_tlb_range(vma, addr, end)	BUILD_BUG()
 #endif
 #endif
 
diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c
index 3d7c01e76efc..0f5414a4a2ec 100644
--- a/mm/pgtable-generic.c
+++ b/mm/pgtable-generic.c
@@ -101,6 +101,56 @@ pte_t ptep_clear_flush(struct vm_area_struct *vma, unsigned long address,
 
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 
+#ifndef __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
+void flush_pte_tlb_range(struct vm_area_struct *vma,
+			 unsigned long addr, unsigned long end)
+{
+	struct mmu_gather tlb;
+
+	tlb_gather_mmu(&tlb, vma->vm_mm, addr, end);
+	tlb_start_vma(&tlb, vma);
+	tlb_set_pte_range(&tlb, addr, end - addr);
+	tlb_end_vma(&tlb, vma);
+	tlb_finish_mmu(&tlb, addr, end);
+}
+
+void flush_pmd_tlb_range(struct vm_area_struct *vma,
+			 unsigned long addr, unsigned long end)
+{
+	struct mmu_gather tlb;
+
+	tlb_gather_mmu(&tlb, vma->vm_mm, addr, end);
+	tlb_start_vma(&tlb, vma);
+	tlb_set_pmd_range(&tlb, addr, end - addr);
+	tlb_end_vma(&tlb, vma);
+	tlb_finish_mmu(&tlb, addr, end);
+}
+
+void flush_pud_tlb_range(struct vm_area_struct *vma,
+			 unsigned long addr, unsigned long end)
+{
+	struct mmu_gather tlb;
+
+	tlb_gather_mmu(&tlb, vma->vm_mm, addr, end);
+	tlb_start_vma(&tlb, vma);
+	tlb_set_pud_range(&tlb, addr, end - addr);
+	tlb_end_vma(&tlb, vma);
+	tlb_finish_mmu(&tlb, addr, end);
+}
+
+void flush_p4d_tlb_range(struct vm_area_struct *vma,
+			 unsigned long addr, unsigned long end)
+{
+	struct mmu_gather tlb;
+
+	tlb_gather_mmu(&tlb, vma->vm_mm, addr, end);
+	tlb_start_vma(&tlb, vma);
+	tlb_set_p4d_range(&tlb, addr, end - addr);
+	tlb_end_vma(&tlb, vma);
+	tlb_finish_mmu(&tlb, addr, end);
+}
+#endif /* __HAVE_ARCH_FLUSH_PMD_TLB_RANGE */
+
 #ifndef __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
 int pmdp_set_access_flags(struct vm_area_struct *vma,
 			  unsigned long address, pmd_t *pmdp,
-- 
2.19.1




  parent reply	other threads:[~2020-04-03  9:06 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-03  9:00 [PATCH v1 0/6] arm64: tlb: add support for TTL feature Zhenyu Ye
2020-04-03  9:00 ` [PATCH v1 1/6] arm64: Detect the ARMv8.4 " Zhenyu Ye
2020-04-21 16:53   ` Christoph Hellwig
2020-04-21 17:13     ` Peter Zijlstra
2020-04-21 17:16       ` Christoph Hellwig
2020-04-22  2:13         ` Zhenyu Ye
2020-04-03  9:00 ` [PATCH v1 2/6] arm64: Add level-hinted TLB invalidation helper Zhenyu Ye
2020-04-03  9:00 ` [PATCH v1 3/6] arm64: Add tlbi_user_level " Zhenyu Ye
2020-04-03  9:00 ` [PATCH v1 4/6] tlb: mmu_gather: add tlb_set_*_range APIs Zhenyu Ye
2020-04-20 11:46   ` Peter Zijlstra
2020-04-03  9:00 ` Zhenyu Ye [this message]
2020-04-20 12:09   ` [PATCH v1 5/6] mm: tlb: Provide flush_*_tlb_range wrappers Peter Zijlstra
2020-04-21 14:18     ` Zhenyu Ye
2020-04-03  9:00 ` [PATCH v1 6/6] arm64: tlb: Set the TTL field in flush_tlb_range Zhenyu Ye
2020-04-20 12:10   ` Peter Zijlstra
2020-04-21  0:06     ` Steven Rostedt
2020-04-21  8:30       ` Peter Zijlstra
2020-04-21 12:22         ` Zhenyu Ye

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