All of lore.kernel.org
 help / color / mirror / Atom feed
From: guoren@kernel.org
To: guoren@kernel.org, anup.patel@wdc.com, palmerdabbelt@google.com,
	arnd@arndb.de, hch@lst.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 V4 1/2] riscv: Fixup _PAGE_GLOBAL in _PAGE_KERNEL
Date: Wed, 26 May 2021 05:49:20 +0000	[thread overview]
Message-ID: <1622008161-41451-2-git-send-email-guoren@kernel.org> (raw)
In-Reply-To: <1622008161-41451-1-git-send-email-guoren@kernel.org>

From: Guo Ren <guoren@linux.alibaba.com>

Kernel virtual address translation should avoid to use ASIDs 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>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Palmer Dabbelt <palmerdabbelt@google.com>
---
 arch/riscv/include/asm/pgtable.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 9469f46..346a3c6 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -134,7 +134,8 @@
 				| _PAGE_WRITE \
 				| _PAGE_PRESENT \
 				| _PAGE_ACCESSED \
-				| _PAGE_DIRTY)
+				| _PAGE_DIRTY \
+				| _PAGE_GLOBAL)
 
 #define PAGE_KERNEL		__pgprot(_PAGE_KERNEL)
 #define PAGE_KERNEL_READ	__pgprot(_PAGE_KERNEL & ~_PAGE_WRITE)
-- 
2.7.4


WARNING: multiple messages have this Message-ID (diff)
From: guoren@kernel.org
To: guoren@kernel.org, anup.patel@wdc.com, palmerdabbelt@google.com,
	arnd@arndb.de, hch@lst.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 V4 1/2] riscv: Fixup _PAGE_GLOBAL in _PAGE_KERNEL
Date: Wed, 26 May 2021 05:49:20 +0000	[thread overview]
Message-ID: <1622008161-41451-2-git-send-email-guoren@kernel.org> (raw)
In-Reply-To: <1622008161-41451-1-git-send-email-guoren@kernel.org>

From: Guo Ren <guoren@linux.alibaba.com>

Kernel virtual address translation should avoid to use ASIDs 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>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Palmer Dabbelt <palmerdabbelt@google.com>
---
 arch/riscv/include/asm/pgtable.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 9469f46..346a3c6 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -134,7 +134,8 @@
 				| _PAGE_WRITE \
 				| _PAGE_PRESENT \
 				| _PAGE_ACCESSED \
-				| _PAGE_DIRTY)
+				| _PAGE_DIRTY \
+				| _PAGE_GLOBAL)
 
 #define PAGE_KERNEL		__pgprot(_PAGE_KERNEL)
 #define PAGE_KERNEL_READ	__pgprot(_PAGE_KERNEL & ~_PAGE_WRITE)
-- 
2.7.4


_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

  reply	other threads:[~2021-05-26  5:50 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-26  5:49 [PATCH V4 0/2] riscv: Fixup asid_allocator remaining issues guoren
2021-05-26  5:49 ` guoren
2021-05-26  5:49 ` guoren [this message]
2021-05-26  5:49   ` [PATCH V4 1/2] riscv: Fixup _PAGE_GLOBAL in _PAGE_KERNEL guoren
2021-05-29 23:42   ` palmerdabbelt
2021-05-29 23:42     ` palmerdabbelt
2021-05-30  5:33     ` Guo Ren
2021-05-30  5:33       ` Guo Ren
2021-05-30  5:33       ` Guo Ren
2021-05-26  5:49 ` [PATCH V4 2/2] riscv: Use use_asid_allocator flush TLB guoren
2021-05-26  5:49   ` guoren
2021-05-27  7:09   ` Christoph Hellwig
2021-05-27  7:09     ` Christoph Hellwig
2021-05-29 23:42     ` palmerdabbelt
2021-05-29 23:42       ` palmerdabbelt
2021-05-30  0:51       ` Guo Ren
2021-05-30  0:51         ` Guo Ren
2021-05-30  0:51         ` Guo Ren
2021-05-31  6:36       ` Christoph Hellwig
2021-05-31  6:36         ` Christoph Hellwig
2021-05-30  0:39     ` Guo Ren
2021-05-30  0:39       ` Guo Ren
2021-05-30  0:39       ` Guo Ren

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1622008161-41451-2-git-send-email-guoren@kernel.org \
    --to=guoren@kernel.org \
    --cc=anup.patel@wdc.com \
    --cc=arnd@arndb.de \
    --cc=guoren@linux.alibaba.com \
    --cc=hch@lst.de \
    --cc=linux-arch@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-riscv@lists.infradead.org \
    --cc=linux-sunxi@lists.linux.dev \
    --cc=palmerdabbelt@google.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.