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Sat, 10 Oct 2026 10:30:09 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ThreadId: AYDIbhfDD_9F Date: Sat, 10 Oct 2026 16:29:49 +0200 From: "Arnd Bergmann" To: "Karl Mehltretter" , "Gary Guo" Cc: "Russell King" , "Miguel Ojeda" , "Boqun Feng" , =?UTF-8?Q?Bj=C3=B6rn_Roy_Baron?= , "Benno Lossin" , "Andreas Hindborg" , "Alice Ryhl" , "Trevor Gross" , "Danilo Krummrich" , "Daniel Almeida" , "Tamir Duberstein" , "Alexandre Courbot" , =?UTF-8?Q?Onur_=C3=96zkan?= , "Linus Walleij" , "Christian Schrefl" , "Bradley Morgan" , "Paul E. McKenney" , "Nathan Chancellor" , "Nick Desaulniers" , "Bill Wendling" , "Justin Stitt" , linux-arm-kernel@lists.infradead.org, rust-for-linux@vger.kernel.org, llvm@lists.linux.dev, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Message-Id: <19b80262-a7f2-42d5-a44b-60a36a1ba373@app.fastmail.com> In-Reply-To: References: <20261008053746.49631-1-kmehltretter@gmail.com> <20261008053746.49631-6-kmehltretter@gmail.com> Subject: Re: [PATCH v2 5/6] ARM: rust: Enable Rust support for ARMv4T Content-Type: text/plain Content-Transfer-Encoding: 7bit On Fri, Oct 9, 2026, at 03:21, Karl Mehltretter wrote: > On Thu, Oct 08, 2026 at 11:08:52AM +0100, Gary Guo wrote: >> > +============= ================ ====================================================== >> > Architecture Level of support Constraints >> > -============= ================ ============================================== >> > -``arm`` Maintained ARMv5TE, ARMv6K and ARMv7, Little Endian only. >> > +============= ================ ====================================================== >> > +``arm`` Maintained ARMv4T, ARMv5TE, ARMv6K and ARMv7, Little Endian only. >> >> Can we say "ARMv4T or above" or something similar? >> > > Plain ARMv6 (CPU_V6, ARM1136r0) and ARMv7-M stay excluded, so "or above" > alone would cover too much. It could be > > ARMv4T and above except plain ARMv6 and ARMv7-M, Little Endian only. > > That is longer than the list. I can change it if there is a preference > for this form. I think your current list is fine. I'm still not sure about ARMv8-A and would not list it either as explicitly included or excluded here. It probably works but this seems hard to guarantee since ARMv6 and ARMv8-A are normally not compatible with one another. Arnd