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Date: Wed, 11 Nov 2009 08:51:07 +0100 From: Clemens Ladisch <clemens@...isch.de> To: Dmitry Adamushko <dmitry.adamushko@...il.com> CC: Andreas Herrmann <herrmann.der.user@...glemail.com>, Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>, "H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org Subject: Re: [PATCH 1/3] x86, ucode-amd: Load ucode-patches once and not separately fo each CPU 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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