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Tsirkin" To: David Hildenbrand Cc: Halil Pasic , linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, virtualization@lists.linux.dev, kvm@vger.kernel.org, Chandra Merla , Stable@vger.kernel.org, Cornelia Huck , Thomas Huth , Eric Farman , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Wei Wang Subject: Re: [PATCH v1] s390/virtio_ccw: don't allocate/assign airqs for non-existing queues Message-ID: <20250407044743-mutt-send-email-mst@kernel.org> References: <20250404153620.04d2df05.pasic@linux.ibm.com> <20250404160025.3ab56f60.pasic@linux.ibm.com> <6f548b8b-8c6e-4221-a5d5-8e7a9013f9c3@redhat.com> <20250404173910.6581706a.pasic@linux.ibm.com> <20250407034901-mutt-send-email-mst@kernel.org> <2b187710-329d-4d36-b2e7-158709ea60d6@redhat.com> <20250407042058-mutt-send-email-mst@kernel.org> <0c221abf-de20-4ce3-917d-0375c1ec9140@redhat.com> Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: <0c221abf-de20-4ce3-917d-0375c1ec9140@redhat.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: MTefSChp0P9kwKtLxAs3kGv6dxStyXdeYXxOEbC03MY_1744015758 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, Apr 07, 2025 at 10:44:21AM +0200, David Hildenbrand wrote: > > > > > > > > > Whoever adds new feat_X *must be aware* about all previous features, > > > otherwise we'd be reusing feature bits and everything falls to pieces. > > > > > > The knowledge is supposed be limited to which feature bit to use. > > I think we also have to know which virtqueue bits can be used, right? > what are virtqueue bits? vq number? -- MST