On 25 May 2018 11:33:08 pm AEST, Guenter Roeck <li...@roeck-us.net> wrote: >On Fri, May 18, 2018 at 11:37:42AM +1000, Michael Neuling wrote: >> Clear the PCR (Processor Compatibility Register) on boot to ensure we >> are not running in a compatibility mode. >> >> We've seen this cause problems when a crash (and kdump) occurs while >> running compat mode guests. The kdump kernel then runs with the PCR >> set and causes problems. The symptom in the kdump kernel (also seen >in >> petitboot after fast-reboot) is early userspace programs taking >> sigills on newer instructions (seen in libc). >> > >Hi folks, > >this patch causes qemu to bail out with > >Trying to write privileged spr 338 (0x152) at c000000000033454 > >when running it with "-M powernv -cpu POWER8" and powernv_defconfig. > >Can you confirm that this is a bug in qemu ?
Hi Guenter, Thanks for the report. As far as I'm concerned this is a qemu bug, that register should exist on a bare metal Power8. Will try and get you a qemu patch to fix it. cheers -- Sent from my Android phone with K-9 Mail. Please excuse my brevity.