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docs/system/ppc/powernv.rst: document KVM support status

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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>
Message-Id: <20211130133153.444601-3-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
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Daniel Henrique Barboza 2021-12-17 17:57:13 +01:00 committed by Cédric Le Goater
parent ebe6c3fab8
commit 3e8f715815
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docs/system/ppc/powernv.rst
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@ -54,6 +54,19 @@ Prebuilt images of ``skiboot`` and ``skiroot`` are made available on the
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
------------