From: David Laight <david.laight.linux@gmail.com>
To: Arnd Bergmann <arnd@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>, Arnd Bergmann <arnd@arndb.de>,
Richard Weinberger <richard@nod.at>,
Anton Ivanov <anton.ivanov@cambridgegreys.com>,
Johannes Berg <johannes@sipsolutions.net>,
Thomas Gleixner <tglx@kernel.org>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
Will Deacon <will@kernel.org>, Boqun Feng <boqun@kernel.org>,
Gary Guo <gary@garyguo.net>, Yury Norov <yury.norov@gmail.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Alexander Usyskin <alexander.usyskin@intel.com>,
Tony Nguyen <anthony.l.nguyen@intel.com>,
Przemek Kitszel <przemyslaw.kitszel@intel.com>,
x86@kernel.org, linux-kernel@vger.kernel.org,
linux-um@lists.infradead.org
Subject: Re: [PATCH 8/8] x86: simplify 32-bit instruction set selection
Date: Fri, 22 May 2026 22:33:49 +0100 [thread overview]
Message-ID: <20260522223349.155dfe20@pumpkin> (raw)
In-Reply-To: <20260522141959.1071595-9-arnd@kernel.org>
On Fri, 22 May 2026 16:19:59 +0200
Arnd Bergmann <arnd@kernel.org> wrote:
> From: Arnd Bergmann <arnd@arndb.de>
...
> Change the CPU selection to build everything with either -march=i586
> or -march=i686 and make the specific options only change the -mtune=
> parameter where this was previously handled by -march=. Note that
> the only -mtune= options that gcc or clang understand for x86-32
> are i486, pentium, pentiumpro, pentium4, atom, geode, k6 and athlon,
> the other ten are just aliases for one of them.
Hmmm... That rather implies there is nothing for anything designed
in the last 20 years.
No wonder code generation choices look strange at times.
You don't want to pick p4, so I guess either p-pro or athlon?
But neither is really anything like even Sandy bridge.
-- David
next prev parent reply other threads:[~2026-05-22 21:33 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-22 14:19 [PATCH 0/8] x86-32 CPU configuration cleanups Arnd Bergmann
2026-05-22 14:19 ` [PATCH 1/8] x86: remove ts5500 platforms support Arnd Bergmann
2026-06-01 8:31 ` Geert Uytterhoeven
2026-06-01 12:27 ` Arnd Bergmann
2026-05-22 14:19 ` [PATCH 2/8] x86: remove AMD Élan remnants Arnd Bergmann
2026-05-22 14:19 ` [PATCH 3/8] x86: make TSC usage unconditional Arnd Bergmann
2026-05-22 16:11 ` Brian Gerst
2026-05-22 14:19 ` [PATCH 4/8] x86: make CX8 " Arnd Bergmann
2026-05-22 14:19 ` [PATCH 5/8] x86: remove dependencies on CONFIG_M... CPU options Arnd Bergmann
2026-05-22 15:46 ` Juergen Gross
2026-05-22 18:54 ` Arnd Bergmann
2026-05-22 19:00 ` Jürgen Groß
2026-05-22 21:22 ` David Laight
2026-05-22 14:19 ` [PATCH 6/8] x86: require minimum 64 byte cache lines Arnd Bergmann
2026-05-22 14:19 ` [PATCH 7/8] x86: remove dependencies on per-CPU options Arnd Bergmann
2026-05-22 14:19 ` [PATCH 8/8] x86: simplify 32-bit instruction set selection Arnd Bergmann
2026-05-22 21:33 ` David Laight [this message]
2026-05-23 8:51 ` Arnd Bergmann
2026-05-23 10:02 ` David Laight
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