[RFC PATCH 1/1] KVM: PPC: Report single stepping capability

[Paul Mackerras]

On Wed, Mar 20, 2019 at 03:39:50PM -0300, Fabiano Rosas wrote:
> When calling the KVM_SET_GUEST_DEBUG ioctl, userspace might request
> the next instruction to be single stepped via the
> KVM_GUESTDBG_SINGLESTEP control bit of the kvm_guest_debug structure.
> 
> We currently don't have support for guest single stepping implemented
> in Book3S HV.
> 
> This patch adds the KVM_CAP_PPC_GUEST_DEBUG_SSTEP capability in order
> to inform userspace about the state of single stepping support.
> 
> Signed-off-by: Fabiano Rosas <farosas at linux.ibm.com>
> ---
>  arch/powerpc/kvm/powerpc.c | 5 +++++
>  include/uapi/linux/kvm.h   | 1 +
>  2 files changed, 6 insertions(+)

I assume since this is [RFC] that you're not expecting it to go
upstream as-is.  If it were to go upstream it would need to include an
update to Documentation/virtual/kvm/api.txt.

Paul.