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[58.6.239.121]) by smtp.gmail.com with ESMTPSA id p11sm5548853pjb.31.2021.02.25.02.51.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Feb 2021 02:51:52 -0800 (PST) Date: Thu, 25 Feb 2021 20:51:45 +1000 From: Nicholas Piggin Subject: Re: [PATCH qemu v13] spapr: Implement Open Firmware client interface To: Alexey Kardashevskiy , Greg Kurz References: <20210209110252.110107-1-aik@ozlabs.ru> <20210222160106.3b463089@bahia.lan> In-Reply-To: <20210222160106.3b463089@bahia.lan> MIME-Version: 1.0 Message-Id: <1614249809.xf2ta0gwg3.astroid@bobo.none> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2607:f8b0:4864:20::636; envelope-from=npiggin@gmail.com; helo=mail-pl1-x636.google.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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Gibson , qemu-ppc@nongnu.org, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Excerpts from Greg Kurz's message of February 23, 2021 1:01 am: > On Mon, 22 Feb 2021 22:48:51 +1100 > Alexey Kardashevskiy wrote: >=20 >> Ping? >>=20 >> I need community support here :) I am hearing that having this mode=20 >> helps heaps with development in fully emulated environments as this=20 >> skips SLOF entirely, for example. Another rumour I am hearing is that=20 >> there is interest in running grub in the userspace which this VOF thing=20 >> makes handy too. >>=20 >=20 > I had tried a previous version of this : skipping SLOF is very > beneficial to do guest work, even when running on KVM. I agree. I do run KVM in simulators which works quite well, but SLOF ends up being the slowest part, it's also a black box to me so it's difficult to go about debugging or changing things. I can't be of much more help with the code I'm sorry, except to add my +1 for the feature and agree with Greg that the non-vof changes seem small. Thanks, Nick