On Mon, Jun 16, 2025 at 01:51:21PM +0200, Christian König wrote: > Hi Peter, > > On 6/16/25 11:39, Peter Zijlstra wrote: > > Hi guys, > > > > My (Intel Sapphire Rapids) workstation has a RX 7800 XT and when I kexec > > a bunch of times, the amdgpu driver gets upset and barfs on boot. > > yeah, that is an "intentional" HW feature and yes you're certainly not > the first one to complain about it :( > > The PSP (platform security processor IIRC) is designed in such a way > that you can initialize it only once after a power cycle / hard reset > for security reasons (e.g. to not leak crypto keys used for digital > rights management etc..). > > On dGPUs we work around that manually by power cycling the ASIC when > that situation is detected during amdgpu load, but that unfortunately > doesn't work 100% reliable.
Right.. hence the splats. > On APUs the situation is even worse because the PSP is shared between > the GPU and the CPU. > > We have forwarded such complains internally for years, but there is > not much else Alex and I can do about it. Oh well. Thanks for the info!
