On 11/30/23 03:30, Ingo Molnar wrote:
* Ashwin Dayanand Kamat <kashwindayan@xxxxxxxxxx> wrote:
From: Ashwin Dayanand Kamat <ashwin.kamat@xxxxxxxxxxxx>
kernel crash was observed because of page fault, while running
cpuhotplug ltp testcases on SEV-ES enabled systems. The crash was
observed during hotplug after the CPU was offlined and the process
was migrated to different cpu. setup_ghcb() is called again which
tries to update ghcb_version in sev_es_negotiate_protocol(). Ideally this
is a read_only variable which is initialised during booting.
This results in pagefault.
Applied to tip:x86/urgent, thanks.
Tom: I've added your Suggested-by and Acked-by, which appeared to be the
case given the v1 discussion, let me know if that's not accurate.
All good.
Thanks,
Tom
I've also tidied up the changelog - final version attached below.
Thanks,
Ingo
