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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=unavailable 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 8/5/25 18:33, Michael Tokarev wrote: > On 05.08.2025 19:26, Miles Glenn wrote: >> On Tue, 2025-07-22 at 17:25 +03..00, Michael Tokarev wrote: > ... >>> There are currently 2 active stable branches, 7.2 and 10.0. >>> Both are supposed to be long-term maintenance.  I think 7.2 >>> can be left behind already. >>> >>> Thanks, >>> >>> /mjt >> >> Michael T., >> >> All of the XIVE fixes/changes originating from myself were made in an >> effort to get PowerVM firmware running on PowerNV with minimal testing >> of OPAL firmware.  However, even with those fixes, running PowerVM on >> PowerNV is still pretty unstable.  While backporting these fixes would >> likely increase the stability of running PowerVM on PowerNV, I do think >> it could pose significant risk to the stability of running OPAL on >> PowerNV.  With that in mind, I think it's probably best if we did not >> backport any of my own XIVE changes. > > My view on this, - having in mind 10.0 most likely will be a long-term > support branch - we can pick the PowerVM changes, and if a breakage with > the case you mentioned is found (which will be the same breakage as with > master branch, hopefully), we can pick fixes for these too. > > Especially as we have more time now after release of 10.1 and before the > next stable series. > > So to me, breakage in stable series is not a good thing, but we can as > well fix it there, - so there might be some balance between known bugs, > possible breakage and future fixes. We have a large set of functional tests for powernv, even checking emulated nested virtualization IIRC. I still have some scripts running 16 sockets powernv machines with a bunch of pci devices to stress emulation a bit more. The upstream target is OPAL firmware, not PowerVM. Patches for PowerVM may be proposed later, if deemed appropriate by the IBM simulation team. Cheers, C. > But it's definitely your call, you know this area much better. > > Thanks, > > /mjt >