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To: Stefano Stabellini CC: Julien Grall , Jan Beulich , , 'Paul Durrant' , 'Eslam Elnikety' , 'Ian Jackson' , 'Wei Liu' , 'Anthony PERARD' , 'George Dunlap' , 'Christian Lindig' , 'David Scott' , 'Volodymyr Babchuk' , =?UTF-8?B?J1JvZ2VyIFBhdSBNb25uw6kn?= , References: <20201203124159.3688-1-paul@xen.org> <20201203124159.3688-2-paul@xen.org> <00ee01d6c98b$507af1c0$f170d540$@xen.org> <8a4a2027-0df3-aee2-537a-3d2814b329ec@suse.com> <00f601d6c996$ce3908d0$6aab1a70$@xen.org> <946280c7-c7f7-c760-c0d3-db91e6cde68a@suse.com> <011201d6ca16$ae14ac50$0a3e04f0$@xen.org> <4fb9fb4c-5849-25f1-ff72-ba3a046d3fd8@suse.com> <5de9f051-4071-4e09-528c-c1fb8345dc25@citrix.com> From: Andrew Cooper Message-ID: <7184a2de-f711-9683-3db6-7b880def022d@citrix.com> Date: Fri, 4 Dec 2020 17:45:00 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Content-Language: en-GB X-ClientProxiedBy: AMSPEX02CAS01.citrite.net (10.69.22.112) To FTLPEX02CL04.citrite.net (10.13.108.177) On 04/12/2020 17:41, Stefano Stabellini wrote: >>> FAOD, I am sure there might be other features that need to be >>> disabled. But we have to start somewhere :). >> Absolutely top of the list, importance wise, is so we can test different >> configurations, without needing to rebuild the hypervisor (and to a >> lesser extent, without having to reboot). >> >> It is a mistake that events/grants/etc were ever available unilaterally >> in HVM guests.  This is definitely a step in the right direction (but I >> thought it would be too rude to ask Paul to make all of those CDF flags >> at once). > +1 > > For FuSa we'll need to be able to disable them at some point soon. FWIW, I have a proper plan for this stuff, which start alongside the fixed toolstack ABI, and will cover all aspects of optional functionality in a domain. ~Andrew