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From: Dylan Jhong <dylan@andestech.com>
To: <paul.walmsley@sifive.com>, <palmer@dabbelt.com>,
	<aou@eecs.berkeley.edu>, <ajones@ventanamicro.com>,
	<alexghiti@rivosinc.com>, <anup@brainfault.org>,
	<rppt@kernel.org>, <samuel@sholland.org>,
	<panqinglin2020@iscas.ac.cn>, <sergey.matyukevich@syntacore.com>,
	<maz@kernel.org>, <linux-riscv@lists.infradead.org>,
	<conor.dooley@microchip.com>, <linux-kernel@vger.kernel.org>
Cc: <ycliang@andestech.com>, <x5710999x@gmail.com>,
	<tim609@andestech.com>, Dylan Jhong <dylan@andestech.com>
Subject: [PATCH 0/1] Enhanced TLB flushing for vmap/vmalloc()
Date: Mon, 7 Aug 2023 16:23:04 +0800	[thread overview]
Message-ID: <20230807082305.198784-1-dylan@andestech.com> (raw)

This patch is actually the v2 version of the this patch[1]. In the v1 version,
Alexandre suggested that I should make the patch more general, so I even changed
the title accordingly. Many thanks to Alexandre.

And Alexandre also submitted a similar patch[2] recently, in which he implemented
TLB flushing via flush_cache_vmap() instead. However, it seems that flush_cache_vmap()
does not cover every place where arch_sync_kernel_mappings() performs TLB flushing.
IMHO, arch_sync_kernel_mappings() cannot be replaced by flush_cache_vmap().
Please correct me if I'm wrong!

[1]: [PATCH] riscv: Flush stale TLB entry with VMAP_STACK enabled
     http://lists.infradead.org/pipermail/linux-riscv/2023-August/037503.html

[2]: [PATCH -fixes] riscv: Implement flush_cache_vmap()
     https://www.spinics.net/lists/kernel/msg4873712.html

Dylan Jhong (1):
  riscv: Implement arch_sync_kernel_mappings() for "preventive" TLB
    flush

 arch/riscv/include/asm/page.h |  2 ++
 arch/riscv/mm/tlbflush.c      | 12 ++++++++++++
 2 files changed, 14 insertions(+)

-- 
2.34.1


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             reply	other threads:[~2023-08-07  8:23 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-07  8:23 Dylan Jhong [this message]
2023-08-07  8:23 ` [PATCH 1/1] riscv: Implement arch_sync_kernel_mappings() for "preventive" TLB flush Dylan Jhong
2023-08-07  9:35   ` kernel test robot
2023-08-07 12:28   ` kernel test robot
2023-08-08 10:16   ` Alexandre Ghiti
2023-08-09 11:16     ` Dylan Jhong

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