Re: [PATCH v2] hw/arm/virt: KVM: Enable PAuth when supported by the host

[Andrew Jones <drjones@redhat.com>]

On Mon, Jan 03, 2022 at 06:05:07PM +0000, Marc Zyngier wrote:
> Add basic support for Pointer Authentication when running a KVM
> guest and that the host supports it, loosely based on the SVE
> support.
> 
> Although the feature is enabled by default when the host advertises
> it, it is possible to disable it by setting the 'pauth=off' CPU
> property. The 'pauth' comment is removed from cpu-features.rst,
> as it is now common to both TCG and KVM.
> 
> Tested on an Apple M1 running 5.16-rc6.
> 
> Cc: Eric Auger <eric.auger@redhat.com>
> Cc: Andrew Jones <drjones@redhat.com>
> Cc: Richard Henderson <richard.henderson@linaro.org>
> Cc: Peter Maydell <peter.maydell@linaro.org>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> ---
> * From v1:
>   - Drop 'pauth' documentation
>   - Make the TCG path common to both TCG and KVM
>   - Some tidying up
> 
>  docs/system/arm/cpu-features.rst |  4 ----
>  target/arm/cpu.c                 | 14 ++++----------
>  target/arm/cpu.h                 |  1 +
>  target/arm/cpu64.c               | 33 ++++++++++++++++++++++++++++----
>  target/arm/kvm64.c               | 21 ++++++++++++++++++++
>  5 files changed, 55 insertions(+), 18 deletions(-)
>

 
Reviewed-by: Andrew Jones <drjones@redhat.com>

Thanks,
drew