Re: [PATCH] arm64: apply ARM64_ERRATUM_845719 workaround for Brahma-B53 core
From: Florian Fainelli <f.fainelli@gmail.com>
Date: 2019-10-31 17:18:55
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On 10/31/19 6:21 AM, Will Deacon wrote:
On Tue, Oct 29, 2019 at 12:16:19PM -0700, Florian Fainelli wrote:quoted
From: Doug Berger <opendmb@gmail.com> The Broadcom Brahma-B53 core is susceptible to the issue described by ARM64_ERRATUM_845719 so this commit enables the workaround to be applied when executing on that core. Since there are now multiple entries to match, we must convert the existing ARM64_ERRATUM_845719 into an erratum list.Looks fine to me, but I have to ask: are you sure you don't want to select any of ARM64_ERRATUM_{826319, 827319, 824069, 819472, 843419} ?
Out of this list, we are only subject to 843419 (and 845719) since I am told that only r0p4 (inclusive) and beyond are relevant. Good thing that you mentioned 843419 because in our downstream kernel (4.9) this is a "static" workaround in that once enabled, it just is unconditionally active, whereas in later kernels there is some additional run time determination of whether this is really needed, thanks!
Also, please can you update Documentation/arm64/silicon-errata.rst ?
Absolutely. -- Florian _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel