From: Will Deacon <will@kernel.org>
To: linux-arm-kernel@lists.infradead.org
Cc: Kees Cook <keescook@chromium.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Sami Tolvanen <samitolvanen@google.com>,
Masahiro Yamada <masahiroy@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 0/4] Upgrade READ_ONCE() to RCpc acquire on arm64 with LTO
Date: Mon, 9 Nov 2020 23:25:51 +0000 [thread overview]
Message-ID: <20201109232551.GA15385@willie-the-truck> (raw)
In-Reply-To: <20201103121721.5166-1-will@kernel.org>
On Tue, Nov 03, 2020 at 12:17:17PM +0000, Will Deacon wrote:
> Hi all,
>
> These patches were previously posted as part of a larger series enabling
> architectures to override __READ_ONCE():
>
> v3: https://lore.kernel.org/lkml/20200710165203.31284-1-will@kernel.org/
>
> With the bulk of that merged, the four patches here override READ_ONCE()
> so that it gains RCpc acquire semantics on arm64 when LTO is enabled. We
> can revisit this as and when the compiler provides a means for us to reason
> about the result of dependency-breaking optimisations. In the meantime,
> this unblocks LTO for arm64, which I would really like to see merged so
> that we can focus on enabling CFI.
>
> I plan to queue these on their own branch in the arm64 tree for 5.11 at
> -rc3.
Now pushed to for-next/lto:
https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/lto
with Mark's comments addressed.
Will
prev parent reply other threads:[~2020-11-09 23:25 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-03 12:17 [PATCH v4 0/4] Upgrade READ_ONCE() to RCpc acquire on arm64 with LTO Will Deacon
2020-11-03 12:17 ` [PATCH v4 1/4] arm64: alternatives: Split up alternative.h Will Deacon
2020-11-03 12:40 ` Mark Rutland
2020-11-03 12:42 ` Will Deacon
2020-11-03 12:17 ` [PATCH v4 2/4] arm64: cpufeatures: Add capability for LDAPR instruction Will Deacon
2020-11-03 12:44 ` Mark Rutland
2020-11-03 12:17 ` [PATCH v4 3/4] arm64: alternatives: Remove READ_ONCE() usage during patch operation Will Deacon
2020-11-03 12:46 ` Mark Rutland
2020-11-03 12:17 ` [PATCH v4 4/4] arm64: lto: Strengthen READ_ONCE() to acquire when CONFIG_LTO=y Will Deacon
2020-11-03 12:58 ` Mark Rutland
2020-11-03 13:13 ` Will Deacon
2020-11-09 23:25 ` Will Deacon [this message]
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=20201109232551.GA15385@willie-the-truck \
--to=will@kernel.org \
--cc=catalin.marinas@arm.com \
--cc=keescook@chromium.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=masahiroy@kernel.org \
--cc=peterz@infradead.org \
--cc=samitolvanen@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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).