On Thu, 21 Jul 2016 15:49:38 +0200
Radim Krčmář <rkrcmar@xxxxxxxxxx> wrote:
> 2016-07-21 14:24+0100, Marc Zyngier:
> > On Thu, 21 Jul 2016 15:17:20 +0200
> > Radim Krčmář <rkrcmar@xxxxxxxxxx> wrote:
> >
> > Hi Radim,
> >
> >> 2016-07-19 13:56+0100, Marc Zyngier:
> >> > The kprobe enablement work has uncovered that changes made by
> >> > a guest to MDSCR_EL1 were propagated to the host when VHE was
> >> > enabled, leading to unexpected exception being delivered.
> >> >
> >> > Moving this register to the list of registers that are always
> >> > context-switched fixes the issue.
> >> >
> >> > Fixes: 9c6c35683286 ("arm64: KVM: VHE: Split save/restore of registers shared between guest and host")
> >> > Cc: stable@xxxxxxxxxxxxxxx #4.6
> >> > Reported-by: Tirumalesh Chalamarla <Tirumalesh.Chalamarla@xxxxxxxxxx>
> >> > Tested-by: Tirumalesh Chalamarla <Tirumalesh.Chalamarla@xxxxxxxxxx>
> >> > Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
> >> > ---
> >>
> >> I would take this patch to 4.7 directly through the main tree.
> >> Are your plans different?
> >
> > If you're happy to take it now, that works for me.
>
> The fix is clear, tested, and would go to 4.7.stable. Better to have it
> in 4.7, IMO.
Agreed.
> > I can either send a
> > PR right away, or you can apply it directly, whichever works best for
> > you.
>
> It is just one patch so I'll apply it and send a pull request to Linus
> on Saturday; less cummulative work that way. :)
Brilliant. Thanks Radim.
M.
--
Jazz is not dead. It just smells funny.
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