Ubuntu
linux-oem-5.6 package

  1. Bug #1915063
  2. Comment #38

Comment 38 for bug 1915063

Revision history for this message
Babu Moger (babumoger) wrote :

@Christian,
Yes. This following patch fixes the problem
 https://lists.gnu.org/archive/html/qemu-devel/2021-03/msg01020.html

I saw your ping on the patch. I am not sure why it is not picked up. I am going ping them today.

>If I might ask - how does the kernel fix you referenced interact with this proposed qemu change?
>Assumptions (please correct me):
Problem seem to happen when guest tries to access the SPEC_CTRL register to with the wrong settings. The kernel fix avoids writing those values and avoids #GP fault.

>1. with the qemu change and using that Rome-v2 it would ask to expose both features and no more crash (even >on unfixed kernels)
Yes. With Qemu patch EPYC-Rome v2 this issue will be fixed.

>2. with the kernel fix it will no more crash, even with an unfixed qemu?
Yes, That is correct. We need at lease one of these patches to fix this problem.