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([2001:b07:6468:f312:49d3:a711:c5a3:8ebf]) by smtp.gmail.com with ESMTPSA id r6sm3932821wrp.85.2019.06.10.05.03.43 (version=TLS1_3 cipher=AEAD-AES128-GCM-SHA256 bits=128/128); Mon, 10 Jun 2019 05:03:44 -0700 (PDT) To: =?UTF-8?Q?Andreas_F=c3=a4rber?= , Natalia Fursova References: <5cf62de9.1c69fb81.66fc.8f4fSMTPIN_ADDED_BROKEN@mx.google.com> <1e9e4edd-f4ad-d8d6-95a2-e0aeab89510d@redhat.com> <5cf7b6e6.1c69fb81.1cdca.e260SMTPIN_ADDED_BROKEN@mx.google.com> <003b01d51f72$5e6f4160$1b4dc420$@Fursova@ispras.ru> <67806828-f666-0c9c-00fc-b520f15013d9@suse.de> From: Paolo Bonzini Message-ID: Date: Mon, 10 Jun 2019 14:03:42 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <67806828-f666-0c9c-00fc-b520f15013d9@suse.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.85.128.44 Subject: Re: [Qemu-devel] qgraph 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: qemu-devel@nongnu.org, =?UTF-8?B?J9Cf0LDRiNCwJw==?= , armbru@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 10/06/19 13:57, Andreas Färber wrote: > Your question doesn't make sense grammatically or conceptually. As Paolo > explained below, QOM is a pure object model, with object types/classes > and properties. Buses are just object instances attached as properties > and don't necessarily even need their own type of bus object (e.g, CPU). > An answer you don't like doesn't change by asking it to other people... > The information is all there, you just need to interpret it correctly. > > There is no technical discussion (no concrete proposal of yours) to > comment on here, and kindly refer to last week's change of maintainers. > > You would be better off just explaining what you really want to achieve. Well, that was explained upthread---finding out what device can be plugged where. Let's see what is in QOM right now: $ qemu-kvm -qmp unix:foo.sock,server,nowait -device virtio-scsi-pci,id=vs $ ./qmp/qom-list -s ~/foo.sock /machine/peripheral/vs|less There is a "virtio-bus" here, and iside it there is a scsi-bus. $ ./qmp/qom-list -s ~/foo.sock /machine/peripheral/vs/virtio-bus/child[0]/ vs.0/ I guess you could add to virtio-scsi-pci a class property for the bus, and then make "vs.0" an alias to that class property. This would allow you find buses by enumerating the class properties. Paolo