> > Early 16h systems (Jaguar) are safe because they don't have a > PSP
Safe yes, but not helpful in coming to grips with the PSP. > > On Sun, Feb 17, 2019 at 12:18 AM Matt B <matthewwbradl...@gmail.com> > wrote: > > > > As for the patching, afaik AMD has released patches for all of these, > but I haven't seen any patches for my 16h systems. > > > Almost all the coreboot-supported AMD 16h boards are AMD _early_ 16h > (so no PSP). Please tell what 16h systems do you have, maybe they > don't have a PSP at all? I was specifically referring to the non-coreboot-supported 16h systems with PSP that I have. Now since the build of x86 AGESA blob used never actually sends PSP the > message RAM is ready, I figured that we may never actually load the "PSP > Secure OS" but only the bootloader part. This sounds very promising and should be well worth pursuing. Also, don't forget pre-PSP silicons still have SMU/PMU. One step at a time I guess. We'd get nowhere if we weren't willing to tolerate some imperfections, especially while working on others. -Matt On Sun, Feb 17, 2019 at 7:20 AM Kyösti Mälkki <kyosti.mal...@gmail.com> wrote: > > On Sun, Feb 17, 2019 at 8:47 AM Mike Banon <mikeb...@gmail.com> wrote: > >> Hi, > > Almost all the coreboot-supported AMD 16h boards are AMD _early_ 16h >> (so no PSP). Please tell what 16h systems do you have, maybe they >> don't have a PSP at all? >> >> > Well pcengines/apu2 variants are fam16h model30h with PSP. > > I have done experiments with it to reduce PSP blob footprint, see the > branch [1] in gerrit. There is some (NDAd) documentation about the firmware > signatures and one can capture PSP firwmare POST codes from LPC. Now since > the build of x86 AGESA blob used never actually sends PSP the message RAM > is ready, I figured that we may never actually load the "PSP Secure OS" but > only the bootloader part. > > Also, don't forget pre-PSP silicons still have SMU/PMU. > > [1] https://review.coreboot.org/q/topic:"amd-fw-layout"; >
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