On Fri, Mar 31, 2023 at 7:57 AM Rob Herring <robh+dt@xxxxxxxxxx> wrote: > > On Thu, Mar 30, 2023 at 11:51 AM James Morse <james.morse@xxxxxxx> wrote: > > > > Hello! > > > > Changes since the RFC?: > > * Added DT support, in a way that means we don't end up with per-erratum > > strings, or bloat in the calling code to check for those strings. > > * Added a commandline argument. (boo) > > * Changes to support errata affecting features on big-little systems properly. > > > > ~ > > > > When stage1 translation is disabled, the SCTRL_E1.I bit controls the > > attributes used for instruction fetch, one of the options results in a > > non-cacheable access. A whole host of CPUs missed the FWB override > > in this case, meaning a KVM guest could fetch stale/junk data instead of > > instructions. > > > > The workaround is to disable FWB, and do the required cache maintenance > > instead. > > What's FWB? I don't see it defined anywhere in the series. Ah, there it is in patch 1. It wasn't in patch 6, so naturally I went searching in the cover letter. Rob
