From: guoren@kernel.org
To: guoren@kernel.org, anup.patel@wdc.com, palmerdabbelt@google.com,
arnd@arndb.de
Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org, linux-sunxi@lists.linux.dev,
Guo Ren <guoren@linux.alibaba.com>
Subject: [PATCH 1/3] riscv: Fixup _PAGE_GLOBAL in _PAGE_KERNEL
Date: Mon, 24 May 2021 06:51:06 +0000 [thread overview]
Message-ID: <1621839068-31738-1-git-send-email-guoren@kernel.org> (raw)
From: Guo Ren <guoren@linux.alibaba.com>
Kernel virtual address translation should avoid care asid or it'll
cause more TLB-miss and TLB-refill. Because the current asid in satp
belongs to the current process, but the target kernel va TLB entry's
asid still belongs to the previous process.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Anup Patel <anup.patel@wdc.com>
Cc: Palmer Dabbelt <palmerdabbelt@google.com>
---
arch/riscv/include/asm/pgtable.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 78f2323..017da15 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -135,6 +135,7 @@
| _PAGE_PRESENT \
| _PAGE_ACCESSED \
| _PAGE_DIRTY \
+ | _PAGE_GLOBAL \
| _PAGE_CACHE)
#define PAGE_KERNEL __pgprot(_PAGE_KERNEL)
--
2.7.4
next reply other threads:[~2021-05-24 6:51 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-24 6:51 guoren [this message]
2021-05-24 6:51 ` [PATCH 2/3] riscv: Fixup PAGE_UP in asm/page.h guoren
2021-05-25 6:34 ` Christoph Hellwig
2021-05-25 9:28 ` Guo Ren
2021-05-25 9:34 ` Christoph Hellwig
2021-05-24 6:51 ` [PATCH 3/3] riscv: Use use_asid_allocator flush TLB guoren
2021-05-24 8:13 ` Anup Patel
2021-05-24 8:03 ` [PATCH 1/3] riscv: Fixup _PAGE_GLOBAL in _PAGE_KERNEL Anup Patel
2021-05-24 8:22 ` Guo Ren
2021-05-24 10:42 ` Anup Patel
2021-05-24 12:01 ` Guo Ren
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