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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
------------
--
2.31.1