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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


             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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