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[142.162.113.180]) by smtp.gmail.com with ESMTPSA id l198sm11808585qke.70.2019.11.20.05.03.19 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 20 Nov 2019 05:03:20 -0800 (PST) Received: from jgg by mlx.ziepe.ca with local (Exim 4.90_1) (envelope-from ) id 1iXPdf-00062Y-D3; Wed, 20 Nov 2019 09:03:19 -0400 Date: Wed, 20 Nov 2019 09:03:19 -0400 From: Jason Gunthorpe To: "Michael S. Tsirkin" Cc: Jason Wang , Parav Pandit , Jeff Kirsher , "davem@davemloft.net" , "gregkh@linuxfoundation.org" , Dave Ertman , "netdev@vger.kernel.org" , "linux-rdma@vger.kernel.org" , "nhorman@redhat.com" , "sassmann@redhat.com" , Kiran Patil , Alex Williamson , "Bie, Tiwei" Subject: Re: [net-next v2 1/1] virtual-bus: Implementation of Virtual Bus Message-ID: <20191120130319.GA22515@ziepe.ca> References: <20191119164632.GA4991@ziepe.ca> <20191119134822-mutt-send-email-mst@kernel.org> <20191119191547.GL4991@ziepe.ca> <20191119163147-mutt-send-email-mst@kernel.org> <20191119231023.GN4991@ziepe.ca> <20191119191053-mutt-send-email-mst@kernel.org> <20191120014653.GR4991@ziepe.ca> <20191120022141-mutt-send-email-mst@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191120022141-mutt-send-email-mst@kernel.org> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org On Wed, Nov 20, 2019 at 02:38:08AM -0500, Michael S. Tsirkin wrote: > > > I don't think that extends as far as actively encouraging userspace > > > drivers poking at hardware in a vendor specific way. > > > > Yes, it does, if you can implement your user space requirements using > > vfio then why do you need a kernel driver? > > People's requirements differ. You are happy with just pass through a VF > you can already use it. Case closed. There are enough people who have > a fixed userspace that people have built virtio accelerators, > now there's value in supporting that, and a vendor specific > userspace blob is not supporting that requirement. I have no idea what you are trying to explain here. I'm not advocating for vfio pass through. Jason