On Tue, Jun 20, 2023 at 09:27:18PM +0100, Mark Brown wrote: > On Tue, Jun 20, 2023 at 09:16:05PM +0200, Neil Armstrong wrote: > > > This patch on linux-next causes a great amount of: > > > X xxx.xxxxxx Emulated RAZ for ID register: ISS 0x36002f > > > messages printed by the system firmware on the Qualcomm SM8550 SoC, > > and the platform is barely usable. > > Regardless of what the kernel is doing it looks like there's a firmware > issue here, all otherwise undefined registers in the ID space should be > RAZ so spamming the logs like this isn't great. Agreed. This isn't a kernel issue... We already do 2 ID register reads in __cpu_setup(), so can't really blame this change for adding a third. This stinks of Gunyah: https://github.com/quic/gunyah-hypervisor/blob/3d4014404993939f898018cfb1935c2d9bfc2830/hyp/vm/vcpu/aarch64/src/sysreg_traps.c#L1177 -- Thanks, Oliver
