[PATCH v4 33/40] KVM: arm64: Configure c15, PMU, and debug register traps on cpu load/put for VHE

[Andrew Jones]

On Thu, Feb 15, 2018 at 10:03:25PM +0100, Christoffer Dall wrote:
> We do not have to change the c15 trap setting on each switch to/from the
> guest on VHE systems, because this setting only affects EL0.
> 
> The PMU and debug trap configuration can also be done on vcpu load/put
> instead, because they don't affect how the host kernel can access the
> debug registers while executing KVM kernel code.
> 
> Signed-off-by: Christoffer Dall <christoffer.dall at linaro.org>
> ---
>  arch/arm64/include/asm/kvm_hyp.h |  3 +++
>  arch/arm64/kvm/hyp/switch.c      | 31 ++++++++++++++++++++++---------
>  arch/arm64/kvm/hyp/sysreg-sr.c   |  4 ++++
>  3 files changed, 29 insertions(+), 9 deletions(-)
>

The last patch 32/40 probably should have been closer to 13/40 in
this series. That would allow this patch to directly follow it's
preparatory patch 31/40, but I'm just whiny reviewer...

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