Messages in this thread | | | From | Lecopzer Chen <> | Subject | Re: [PATCH] irqchip/gic-v3: Fix IPRIORITYR can't perform byte operations in GIC-600 | Date | Tue, 30 Mar 2021 22:24:40 +0800 |
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[...] > > > > > > > > From the architecture spec: > > > > > > > > <quote> > > > > 11.1.3 GIC memory-mapped register access > > > > > > > > In any system, access to the following registers must be supported: > > > > > > > > [...] > > > > * Byte accesses to: > > > > - GICD_IPRIORITYR<n>. > > > > - GICD_ITARGETSR<n>. > > > > - GICD_SPENDSGIR<n>. > > > > - GICD_CPENDSGIR<n>. > > > > - GICR_IPRIORITYR<n>. > > > > </quote> > > > > > > > > So if GIC600 doesn't follow this architectural requirement, this is a > > > > HW erratum, and I want an actual description of the HW issue together > > > > with an erratum number. > > > > > > > > Lorenzo, can you please investigate on your side? > > > > > > Sure - I will look into it and report back. > > > > Checked - I don't think this patch is needed so it should be dropped and > > a follow-up discussion can continue in the relevant/appropriate forum - > > if there is anything left to discuss. > > Thanks for having had a look. This really smells like an integration > issue rather than an actual GIC bug. > > Lecopzer, please check with your HW people and potentially ARM, as I > think you are looking at the wrong problem.
Thanks a lot for the suggestion and checking,
I think I'll back to disscuss with ARM and our HW team to figure out the previous answer from ARM Support in detail.
Thanks again!
Lecopzer
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