[PATCH 3/3] KVM: arm64: Handle SCXTNUM_ELx traps

[Will Deacon]

On Tue, Nov 03, 2020 at 05:14:45PM +0000, Marc Zyngier wrote:
> As the kernel never sets HCR_EL2.EnSCXT, accesses to SCXTNUM_ELx
> will trap to EL2. Let's handle that as gracefully as possible
> by injecting an UNDEF exception into the guest. This is consistent
> with the guest's view of ID_AA64PFR0_EL1.CSV2 being at most 1.
> 
> Signed-off-by: Marc Zyngier <maz at kernel.org>
> ---
>  arch/arm64/include/asm/sysreg.h | 4 ++++
>  arch/arm64/kvm/sys_regs.c       | 4 ++++
>  2 files changed, 8 insertions(+)

Acked-by: Will Deacon <will at kernel.org>

Will