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[188.85.150.151]) by smtp.gmail.com with ESMTPSA id y10-20020a5d470a000000b0032d9efeccd8sm1077950wrq.51.2023.10.20.00.33.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Oct 2023 00:33:57 -0700 (PDT) From: Juan Quintela To: Stefan Berger Cc: qemu-devel@nongnu.org, Stefan Berger , Marcel Apfelbaum , qemu-ppc@nongnu.org, Nicholas Piggin , qemu-s390x@nongnu.org, Gerd Hoffmann , Corey Minyard , Samuel Thibault , Richard Henderson , David Hildenbrand , Ilya Leoshkevich , Fabiano Rosas , Eric Farman , Peter Xu , Harsh Prateek Bora , John Snow , qemu-block@nongnu.org, Mark Cave-Ayland , Christian Borntraeger , =?utf-8?Q?Marc-Andr?= =?utf-8?Q?=C3=A9?= Lureau , Stefan Weil , qemu-arm@nongnu.org, Jason Wang , Corey Minyard , Leonardo Bras , Thomas Huth , Peter Maydell , "Michael S. Tsirkin" , =?utf-8?Q?C=C3=A9dric?= Le Goater , David Gibson , Halil Pasic , Daniel Henrique Barboza Subject: Re: [PATCH 13/13] migration: Use vmstate_register_any() for vmware_vga In-Reply-To: <7f200fc5-3db3-cb13-3b9c-9861dfb358ec@linux.ibm.com> (Stefan Berger's message of "Thu, 19 Oct 2023 16:42:07 -0400") References: <20231019190831.20363-1-quintela@redhat.com> <20231019190831.20363-14-quintela@redhat.com> <7f200fc5-3db3-cb13-3b9c-9861dfb358ec@linux.ibm.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.3 (gnu/linux) Date: Fri, 20 Oct 2023 09:33:57 +0200 Message-ID: <871qdp3fyy.fsf@secure.mitica> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain Received-SPF: pass client-ip=170.10.129.124; envelope-from=quintela@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_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: quintela@redhat.com Errors-To: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org Sender: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org X-TUID: HevtURdw5zME Stefan Berger wrote: > On 10/19/23 15:08, Juan Quintela wrote: >> I have no idea if we can have more than one vmware_vga device, so play >> it safe. >> >> Signed-off-by: Juan Quintela > > Reviewed-by: Stefan Berger > >> --- >> hw/display/vmware_vga.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/hw/display/vmware_vga.c b/hw/display/vmware_vga.c >> index 09591fbd39..7490d43881 100644 >> --- a/hw/display/vmware_vga.c >> +++ b/hw/display/vmware_vga.c >> @@ -1264,7 +1264,7 @@ static void vmsvga_init(DeviceState *dev, struct vmsvga_state_s *s, >> >> vga_common_init(&s->vga, OBJECT(dev), &error_fatal); >> vga_init(&s->vga, OBJECT(dev), address_space, io, true); >> - vmstate_register(NULL, 0, &vmstate_vga_common, &s->vga); >> + vmstate_register_any(NULL, &vmstate_vga_common, &s->vga); > > And the first one registered with 'any' will again have instance_id = > 0 assigned. So there's no side effect to be expected with any of these > device, I suppose. I will really change all the remaining registrations with 0 to any. * If there is only a registration for that device: nothing changes * If there is more than one registration for that device: It *could* work (from the migration point of view). But then there are devices that *clearly* will not be able to have more than one instance, so 0 is the best option there. On top of my head: * cpu-timers * replay * migration global_state And the rest that I put on the cover letter are basically devices that are used only once on the board initilization routine, so I feel safe leaving them with zero. Thanks for the review, Juan.