From: Will Deacon <will@kernel.org>
To: Zayd Qumsieh <zayd_qumsieh@apple.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Mark Brown <broonie@kernel.org>, Ard Biesheuvel <ardb@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Mateusz Guzik <mjguzik@gmail.com>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Marc Zyngier <maz@kernel.org>,
Oliver Upton <oliver.upton@linux.dev>,
Miguel Luis <miguel.luis@oracle.com>,
Joey Gouly <joey.gouly@arm.com>,
Christoph Paasch <cpaasch@apple.com>,
Kees Cook <keescook@chromium.org>,
Sami Tolvanen <samitolvanen@google.com>,
Baoquan He <bhe@redhat.com>,
Lecopzer Chen <lecopzer.chen@mediatek.com>,
Joel Granados <j.granados@samsung.com>,
Dawei Li <dawei.li@shingroup.cn>,
Andrew Morton <akpm@linux-foundation.org>,
Florent Revest <revest@chromium.org>,
David Hildenbrand <david@redhat.com>,
Stefan Roesch <shr@devkernel.io>,
Andy Chiu <andy.chiu@sifive.com>,
Josh Triplett <josh@joshtriplett.org>,
Oleg Nesterov <oleg@redhat.com>, Helge Deller <deller@gmx.de>,
Zev Weiss <zev@bewilderbeest.net>,
Ondrej Mosnacek <omosnace@redhat.com>,
Miguel Ojeda <ojeda@kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/3] tso: aarch64: Expose TSO for virtualized linux on Apple Silicon
Date: Thu, 11 Apr 2024 14:37:56 +0100 [thread overview]
Message-ID: <20240411133755.GA26535@willie-the-truck> (raw)
In-Reply-To: <20240410211652.16640-1-zayd_qumsieh@apple.com>
Hi Zayd,
It makes a nice change to see an apple.com address on the mailing list!
On Wed, Apr 10, 2024 at 02:16:38PM -0700, Zayd Qumsieh wrote:
> x86 CPUs use a TSO memory model. Apple Silicon CPUs have the ability to
> selectively use a TSO memory model. This can be done by setting the
> ACTLR.TSOEN bit to 1. This feature is useful for x86 emulators, since it
> removes the need for emulators to insert memory barriers in order to abide
> by the TSO memory model. This patch series will add ACTLR.TSOEN support to
> virtualized linux on Apple Silicon machines. Userspace will be able to use
> a prctl to change the memory model of the CPU from the default ARM64 memory
> model to a TSO memory model.
FWIW: I've replied on the other series from Hector:
https://lore.kernel.org/lkml/20240411132853.GA26481@willie-the-truck/T/#t
Will
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prev parent reply other threads:[~2024-04-11 14:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-10 21:16 [PATCH 0/3] tso: aarch64: Expose TSO for virtualized linux on Apple Silicon Zayd Qumsieh
2024-04-10 21:16 ` [PATCH 1/3] tso: aarch64: allow linux kernel to read/write ACTLR.TSOEN Zayd Qumsieh
2024-04-10 21:16 ` [PATCH 2/3] tso: aarch64: context-switch tso bit on thread switch Zayd Qumsieh
2024-04-10 21:16 ` [PATCH 3/3] tso: aarch64: allow userspace to set tso bit using prctl Zayd Qumsieh
2024-04-10 23:23 ` [PATCH 0/3] tso: aarch64: Expose TSO for virtualized linux on Apple Silicon Hector Martin
2024-04-11 13:37 ` Will Deacon [this message]
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