On Tue, Apr 12, 2022 at 0:22 Alex Bennée <alex.ben...@linaro.org> wrote:
> > Itaru Kitayama <itaru.kitay...@gmail.com> writes: > > > Good point; however per the SBSA specification, DEN0029F, there's the > > PE architecture requirement at > > each level from 1 to 7, so now I am wondering whether supporting > > cortex-a57 and a72 are good enough to > > set up a fully SBSA level 7 compliant "board" in QMEU. > > Not currently - we are working on cortex-a76/neoverse-n1 which will > provide a v8.2 baseline for sbsa-ref. See: > > Subject: [PATCH 00/16] target/arm: Implement features Debugv8p4, RAS, > IESB > Date: Fri, 8 Apr 2022 17:07:26 -0700 > Message-Id: <20220409000742.293691-1-richard.hender...@linaro.org> > > and: > > Subject: [PATCH 0/7] target/arm: More trivial features, A76, N1 > Date: Sat, 9 Apr 2022 22:57:18 -0700 > Message-Id: <20220410055725.380246-1-richard.hender...@linaro.org> > > which are stepping stones to those concrete models. Please review if you > can. Sure, Shuichi and I will review Richard’s series and give feedback if there’s any. Itaru. > > > Also, the 'max' > > is there, but does not boot. > > Generally the firmware has to be built with the knowledge of what system > it is running on so will generally fall over if run on a different CPU > feature set. However I believe Leif had a firmware branch which attempts > to work with -cpu max by doing proper ID register probing before using > features. However -cpu max is very a moving feast which is why there is > a push for the concrete CPU types. > > I believe there is a proposal for a versioned sbsa-ref model which will > step of the default CPU for higher levels. > > > > > Itaru. > > > > On Sat, Apr 9, 2022 at 12:04 AM Peter Maydell <peter.mayd...@linaro.org> > wrote: > >> > >> On Fri, 8 Apr 2022 at 15:59, Itaru Kitayama <itaru.kitay...@gmail.com> > wrote: > >> > I'd like to add a64fx cpu to the sbsa-ref board, if there's a quick > and dirty > >> > way of completing that, advice from the maintainers is greatly > appreciated. > >> > >> I have cc'd the sbsa-ref maintainers (as listed in the MAINTAINERS > file). > >> > >> However, I'm not sure why you want to add the a64fx CPU to this > >> board model? The sbsa-ref board is intended as a platform for > >> developing firmware that runs on Server Base System Architecture > >> hardware, so it deliberately doesn't have support for every CPU > >> type QEMU implements. > >> > >> thanks > >> -- PMM > > > -- > Alex Bennée >
