Messages in this thread | ![/](/images/icornerl.gif) | | From | Doug Anderson <> | Date | Tue, 23 Apr 2019 07:37:53 -0700 | Subject | Re: [PATCH 2/2] ARM: errata: add support for A12/A17 errata CR711784 |
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Hi,
On Tue, Apr 23, 2019 at 3:19 AM Robin Murphy <robin.murphy@arm.com> wrote: > > Hi Doug, > > On 19/04/2019 23:18, Douglas Anderson wrote: > > This adds a code for turning on chicken bit 11, which appears to avoid > > a potential CPU deadlock that could occur. The exact set of > > instruction needed to trigger this errata is not totaly known but we > > have a high level of confidence that the problem is fixed by setting > > chicken bit 11. > > > > All details are in http://crbug.com/711784 > > > > This erratum has no known number and thus I have tagged it CR711784 > > (after the Chrome OS bug number). I have created separate A12 / A17 > > configs to match how the rest of the A12 / A17 errata is handled. > > The written-up workarounds for 85727[12] do actually say to set both > bits 10 and 11 of the diagnostic register, so you could probably just > fold this into the first patch and not have to worry about what to call it. > > Robin.
Thanks! I was unable to find any official docs here and my past contacts with ARM about this matter have been silent. All I had was a preliminary errata description and it only included bit 10.
I'll spin a v2 with them both together then.
-Doug
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