Re: [PATCH] KVM: arm64: Fix nVHE hyp panic host context restore

[Greg KH <greg@kroah.com>]

On Mon, Mar 15, 2021 at 12:21:36PM +0000, Andrew Scull wrote:
> Commit c4b000c3928d4f20acef79dccf3a65ae3795e0b0 upstream.
> 
> When panicking from the nVHE hyp and restoring the host context, x29 is
> expected to hold a pointer to the host context. This wasn't being done
> so fix it to make sure there's a valid pointer the host context being
> used.
> 
> Rather than passing a boolean indicating whether or not the host context
> should be restored, instead pass the pointer to the host context. NULL
> is passed to indicate that no context should be restored.
> 
> Fixes: a2e102e20fd6 ("KVM: arm64: nVHE: Handle hyp panics")
> Cc: stable@vger.kernel.org # 5.11.y only
> Signed-off-by: Andrew Scull <ascull@google.com>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> Link: https://lore.kernel.org/r/20210219122406.1337626-1-ascull@google.com
> ---
>  arch/arm64/include/asm/kvm_hyp.h |  3 ++-
>  arch/arm64/kvm/hyp/nvhe/host.S   | 20 ++++++++++----------
>  arch/arm64/kvm/hyp/nvhe/switch.c |  3 +--
>  3 files changed, 13 insertions(+), 13 deletions(-)

Both backports now queued up, thanks.

greg k-h