From: Clemens Ladisch <clemens@ladisch.de>
To: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Cc: Andreas Herrmann <herrmann.der.user@googlemail.com>,
Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/3] x86, ucode-amd: Load ucode-patches once and not separately fo each CPU
Date: Wed, 11 Nov 2009 08:51:07 +0100 [thread overview]
Message-ID: <4AFA6CEB.6020202@ladisch.de> (raw)
In-Reply-To: <b647ffbd0911100402k4f8648b8ref712f4c60fb8a7b@mail.gmail.com>
Dmitry Adamushko wrote:
> btw., if we could safely assume that all the cpus after the ucode
> upgrade share the same version/patch-level of ucode, we would be able
> to cache a single ucode instance once and use it for all. I don't
> recall anyone clearly stating that such multi-cpu-type systems can't
> really exist.
>
> e.g. is it possible to have AMD systems with cpus which differ from
> each other not only by their revisions (patch_level)?
The Revision Guide for AMD Family 10h Processors (#41322) says, in
section "Mixed Silicon Support", that the Opteron B steppings can be
used with each other (DR-BA, DR-B2, DR-B3; CPUID 00100F2xh). Are
different steppings considered equivalent?
Clemens
next prev parent reply other threads:[~2009-11-11 7:51 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-10 11:06 [PATCH 0/3] x86, ucode-amd: trim verbosity Andreas Herrmann
2009-11-10 11:07 ` [PATCH 1/3] x86, ucode-amd: Load ucode-patches once and not separately fo each CPU Andreas Herrmann
2009-11-10 12:02 ` Dmitry Adamushko
2009-11-11 7:51 ` Clemens Ladisch [this message]
2009-11-11 11:27 ` Andreas Herrmann
2009-11-12 15:05 ` Andreas Herrmann
2009-11-10 13:21 ` [tip:x86/microcode] x86: ucode-amd: Load ucode-patches once and not separately of " tip-bot for Andreas Herrmann
2009-11-10 11:08 ` [PATCH 2/3] x86, ucode-amd: Don't warn when no ucode is available for a CPU revision Andreas Herrmann
2009-11-10 13:22 ` [tip:x86/microcode] x86: " tip-bot for Andreas Herrmann
2009-11-10 11:09 ` [PATCH 3/3] x86, ucode-amd: printk(KERN_* to pr_* conversion Andreas Herrmann
2009-11-10 13:22 ` [tip:x86/microcode] x86: ucode-amd: Convert printk(KERN_*...) to pr_*(...) tip-bot for Andreas Herrmann
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