From: Alistair Popple <apopple@nvidia.com>
To: "Björn Töpel" <bjorn@kernel.org>
Cc: Chunyan Zhang <zhangchunyan@iscas.ac.cn>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Paul Walmsley <paul.walmsley@sifive.com>,
Alexandre Ghiti <alex@ghiti.fr>,
Andrew Morton <akpm@linux-foundation.org>,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
Chunyan Zhang <zhang.lyra@gmail.com>,
linux-mm@kvack.org
Subject: Re: [PATCH V5 1/3] riscv: mm: Prepare for reusing PTE RSW bit(9)
Date: Wed, 5 Feb 2025 11:19:39 +1100 [thread overview]
Message-ID: <g2dmtynytclbygcmzaifqrbi64ozw4e5y4mpd2pipsnlwhmhyx@xiy2w5x75fnm> (raw)
In-Reply-To: <87frl0snf6.fsf@all.your.base.are.belong.to.us>
On Thu, Jan 30, 2025 at 09:42:21AM +0100, Björn Töpel wrote:
> Chunyan Zhang <zhangchunyan@iscas.ac.cn> writes:
>
> > The PTE bit(9) on RISC-V is reserved for software, it is used by devmap
> > now which has to be disabled if we want to use bit(9) for other features,
> > since there's no more free PTE bit on RISC-V now.
> >
> > So to make ARCH_HAS_PTE_DEVMAP selectable, this patch uses it as
> > the build condition of devmap definitions.
>
> Heads-up: It seems like Alistair's series [1] that removes the devmap
> PTE bit will most likely land in 6.15.
That is indeed the plan/hope. I just reposted the series based on v6.14-rc1.
Note that I didn't include the devmap PTE change in the repost as I plan on
posting that as a separate followup series but I'm hoping both will make it
for v6.15.
- Alistair
> Björn
>
> [1] https://lore.kernel.org/linux-mm/cover.11189864684e31260d1408779fac9db80122047b.1736488799.git-series.apopple@nvidia.com/
next prev parent reply other threads:[~2025-02-05 0:19 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20241113095833.1805746-1-zhangchunyan@iscas.ac.cn>
[not found] ` <20241113095833.1805746-2-zhangchunyan@iscas.ac.cn>
2025-01-30 8:42 ` Björn Töpel
2025-02-05 0:19 ` Alistair Popple [this message]
2025-02-11 1:20 ` Chunyan Zhang
2025-02-11 4:01 ` Deepak Gupta
2025-02-11 8:05 ` Chunyan Zhang
2025-02-20 18:23 ` Deepak Gupta
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