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[83.42.66.122]) by smtp.gmail.com with ESMTPSA id h16sm3723118wre.52.2021.07.29.07.59.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 29 Jul 2021 07:59:49 -0700 (PDT) Subject: Re: modular tcg To: Claudio Fontana , Gerd Hoffmann , Alex Bennee References: <20210722220952.17444-1-jziviani@suse.de> <20210722220952.17444-2-jziviani@suse.de> <20210723095231.sfbkhdwdg43nedkk@sirius.home.kraxel.org> <4b5c010f-1365-e746-c269-9b9e48771f7b@suse.de> <6a3940a4-ca70-343b-5724-0f8f59d6fde4@suse.de> <20210723124858.rh63jh2esxahib4e@sirius.home.kraxel.org> <20210729091407.n7bdlyw5rsievdch@sirius.home.kraxel.org> <20210729102955.k34jqpetqy6owivr@sirius.home.kraxel.org> <75a7378d-63b2-d1d7-c7e1-ca4d13cf01cb@suse.de> <6514e353-fca6-98a7-cb35-46a90c37389b@amsat.org> <71567414-d0e3-8f5b-d4d3-b34caa8c1f59@suse.de> From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= Message-ID: Date: Thu, 29 Jul 2021 16:59:48 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <71567414-d0e3-8f5b-d4d3-b34caa8c1f59@suse.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::435; envelope-from=philippe.mathieu.daude@gmail.com; helo=mail-wr1-x435.google.com X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.249, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.248, NICE_REPLY_A=-0.125, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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: pbonzini@redhat.com, richard.henderson@linaro.org, qemu-devel@nongnu.org, "Jose R. Ziviani" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 7/29/21 4:22 PM, Claudio Fontana wrote: > On 7/29/21 1:34 PM, Philippe Mathieu-Daudé wrote: >> On 7/29/21 12:44 PM, Claudio Fontana wrote: >>> On 7/29/21 12:29 PM, Gerd Hoffmann wrote: >>>> Hi, >>>> >>>>> And another comment: I think we should have some progress on ARM with >>>>> the kvm/tcg split and with the KConfig of boards, before we continue >>>>> here. >>>> >>>> Why? This can easily be tacked in parallel. We can flip the switch >>>> for modular tcg per target in meson.build. >>>> >>>> take care, >>>> Gerd >>>> >>> >>> Because in the end we need to do this for ARM too and for the other archs too (s390 is already ok), >>> >>> and in order to be sure not to end up in a dead-end, I think it would be good to have at least a sketch for the other archs as well.. >>> >>> Just my 2c ofc, I think really here still ARM is behind, and we should help it catch up. >>> >>> If I had more time I would have pushed more on the ARM series, but.. yeah. >> >> IIUC Alex is waiting 6.2 release to respin. >> > > How does the Kconfig for ARM improvements go? I mean I think those improvements (enabling only compatible boards with the chosen accelerators) are important for both tcg-kvm split and possibly for modularization of ARM accelerators too right? I think we all (Alex/you/me) reached the same point where builds work but current the testing framework isn't ready for non-TCG or modularized-TCG so the CI ends failing. I don't want to push for 'CI build-only' because most of the annoying problems were from runtime (interfaces not resolved, ... which are important when using modules or board with unavailable devices). I tried to address that with a QMP command to query accelerators but there is a disagreement whether we should query for available/built-in/ loaded/modularized-but-not-installed/...). At this point I think I fairly understand the technical problems but misunderstand the big picture here, in particular w.r.t. management apps. I spent too many time on this to appear enthusiastic, sorry.