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[PATCH v2 2/2] docs/system/ppc/powernv.rst: document KVM support status

From: Daniel Henrique Barboza
Subject: [PATCH v2 2/2] docs/system/ppc/powernv.rst: document KVM support status
Date: Tue, 30 Nov 2021 10:31:53 -0300

Put in a more accessible place the reasoning behind our decision
to officially drop KVM support in the powernv machine.

Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
 docs/system/ppc/powernv.rst | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/docs/system/ppc/powernv.rst b/docs/system/ppc/powernv.rst
index 86186b7d2c..8304e85c51 100644
--- a/docs/system/ppc/powernv.rst
+++ b/docs/system/ppc/powernv.rst
@@ -58,6 +58,19 @@ Prebuilt images of ``skiboot`` and ``skiroot`` are made 
available on the `OpenPO
 QEMU includes a prebuilt image of ``skiboot`` which is updated when a
 more recent version is required by the models.
+Current acceleration status
+KVM acceleration in Linux Power hosts is provided by the kvm-hv and
+kvm-pr modules. kvm-hv is adherent to PAPR and it's not compliant with
+powernv. kvm-pr in theory could be used as a valid accel option but
+this isn't supported by kvm-pr at this moment.
+To spare users from dealing with not so informative errors when attempting
+to use accel=kvm, the powernv machine will throw an error informing that
+KVM is not supported. This can be revisited in the future if kvm-pr (or
+any other KVM alternative) is usable as KVM accel for this machine.
 Boot options

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