Re: [PATCH v2 0/3] KVM: arm64: Fixes for timers and pKVM

On Sat, Aug 8, 2026 at 7:44 PM Oliver Upton <[email protected]> wrote:
>
> On Sat, 08 Aug 2026 08:58:21 +0000, Mostafa Saleh wrote:
> > What started as a  small patch ended up as a 3 patch series thanks
> > to Sashiko.
> >
> > First patch from Marc to consolidate the offset calculation,
> > follow up patches fix issues with non-protected VM and timer
> > offset and protected VM running with broken CNTVOFF_EL2.
> >
> > [...]
>
> Dropped the unintended SOB in patch 3 you mentioned.
>
> Applied to next, thanks!
>
> [1/3] KVM: arm64: Make timer_get_offset() work in all contexts
>       https://git.kernel.org/kvmarm/kvmarm/c/2858600ecd01
> [2/3] KVM: arm64: Fix timer offsets for non-protected VMs
>       https://git.kernel.org/kvmarm/kvmarm/c/47d3eef780e3
> [3/3] KVM: arm64: Fix hvhe and broken CNTVOFF_EL2
>       https://git.kernel.org/kvmarm/kvmarm/c/2e813a6e8ebe
>

Thanks Oliver! I believe there is one more bug. I'm not sure where the
bug is or if it relates to the broken timers.
Before those patches I could not boot a protected VM because of the
panic, now after booting protected VMs, I sometimes get a system
reset.
I confirmed that cntvoff_el2 does not get written to non-zero, I also
removed the sysreg write completely (rely on xzr value at init) so my
guess is that the HW might be allergic to more than just non-zero
values in cntvoff_el2.
I do not have issues with non-protected VMs anymore.

Thanks,
Mostafa




> --
> Best,
> Oliver