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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: softfail client-ip=148.163.156.1; envelope-from=clg@kaod.org; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -11 X-Spam_score: -1.2 X-Spam_bar: - X-Spam_report: (-1.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_SOFTFAIL=0.665 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Daniel Henrique Barboza , Richard Henderson , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1639687603321100001 Content-Type: text/plain; charset="utf-8" From: Daniel Henrique Barboza 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 Message-Id: <20211130133153.444601-3-danielhb413@gmail.com> Signed-off-by: C=C3=A9dric Le Goater --- 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 edd45d1eaadd..c8f9762342d6 100644 --- a/docs/system/ppc/powernv.rst +++ b/docs/system/ppc/powernv.rst @@ -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. =20 +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=3Dkvm, 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 ------------ =20 --=20 2.31.1