Re: [PATCH v3 4/9] KVM: PPC: Ultravisor: Add generic ultravisor call handler

On Thu, Jun 06, 2019 at 02:36:09PM -0300, Claudio Carvalho wrote:

From: Ram Pai <redacted>

Add the ucall() function, which can be used to make ultravisor calls
with varied number of in and out arguments. Ultravisor calls can be made
from the host or guests.

This copies the implementation of plpar_hcall().

Again, we will want all of this on every powernv-capable kernel, since
they will all need to do UV_WRITE_PATE, even if they have no other
support for the ultravisor.

Paul.