From: Samuel Tardieu <samuel.tardieu@telecom-paris.fr>
To: Petr Cvek <petrcvekcz@gmail.com>
Cc: pbonzini@redhat.com, marcel.apfelbaum@gmail.com, mst@redhat.com,
qemu-devel@nongnu.org
Subject: Re: [PATCH] qemu/timer: Don't use RDTSC on i486
Date: Sun, 26 Nov 2023 14:03:22 +0100 [thread overview]
Message-ID: <87il5o64yf.fsf@telecom-paris.fr> (raw)
In-Reply-To: <3380b626-0d94-489f-bf98-6146c1420a51@gmail.com>
Petr Cvek <petrcvekcz@gmail.com> writes:
> Actually I was thinking about mentioning it in the commit
> message also, but I wasn't able
> to find any specification for that (if all compilers use it).
Note that this change would be safe: at worst, some compilers
don't use __tune_i386__ and the situation would be the same as
today without the patch.
> Other problem is the __tune_i386__ is also set when -mtune=i386
> (but with -march=i686).
Indeed, this is the case for GCC (not clang).
Sam
--
Samuel Tardieu
Télécom Paris - Institut Polytechnique de Paris
next prev parent reply other threads:[~2023-11-26 13:05 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-25 12:23 [PATCH] qemu/timer: Don't use RDTSC on i486 Petr Cvek
2023-11-26 12:37 ` Samuel Tardieu
2023-11-26 12:59 ` Petr Cvek
2023-11-26 13:03 ` Samuel Tardieu [this message]
2023-11-26 22:49 ` Petr Cvek
2023-11-26 15:56 ` Paolo Bonzini
2023-11-26 22:52 ` Petr Cvek
2023-11-28 15:52 ` Richard Henderson
2023-11-29 13:50 ` Petr Cvek
2023-11-29 14:27 ` Richard Henderson
2023-11-27 9:49 ` Peter Maydell
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