From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paul Mackerras <paulus@ozlabs.org>
Date: Sat, 15 Jun 2019 07:37:24 +0000
Subject: Re: [PATCH v3 4/9] KVM: PPC: Ultravisor: Add generic ultravisor call handler
Message-Id: <20190615073724.GB24709@blackberry>
List-Id: <kvm-ppc.vger.kernel.org>
References: <20190606173614.32090-1-cclaudio@linux.ibm.com>
 <20190606173614.32090-5-cclaudio@linux.ibm.com>
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To: Claudio Carvalho <cclaudio@linux.ibm.com>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>, Michael Anderson <andmike@linux.ibm.com>, Ram Pai <linuxram@us.ibm.com>, kvm-ppc@vger.kernel.org, Bharata B Rao <bharata@linux.ibm.com>, linuxppc-dev@ozlabs.org, Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>, Thiago Bauermann <bauermann@linux.ibm.com>, Anshuman Khandual <khandual@linux.vnet.ibm.com>

On Thu, Jun 06, 2019 at 02:36:09PM -0300, Claudio Carvalho wrote:
> From: Ram Pai <linuxram@us.ibm.com>
> 
> 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.