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Tsirkin" To: Christoph Hellwig Cc: Srujana Challa , "virtualization@lists.linux.dev" , "kvm@vger.kernel.org" , "jasowang@redhat.com" , "eperezma@redhat.com" , Nithin Kumar Dabilpuram , Jerin Jacob , Greg Kroah-Hartman Subject: Re: [EXTERNAL] Re: [PATCH v2 0/2] vhost-vdpa: Add support for NO-IOMMU mode Message-ID: <20241106131351-mutt-send-email-mst@kernel.org> References: <20240920140530.775307-1-schalla@marvell.com> <20241016134127-mutt-send-email-mst@kernel.org> <20241019201059-mutt-send-email-mst@kernel.org> <20241023041739-mutt-send-email-mst@kernel.org> Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: EeR_fCO9ZOJOAV3KfdVbkX1VIMxNQEbDIGrAq61EZjw_1730916888 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Thu, Oct 24, 2024 at 02:05:43AM -0700, Christoph Hellwig wrote: > On Wed, Oct 23, 2024 at 04:19:02AM -0400, Michael S. Tsirkin wrote: > > On Tue, Oct 22, 2024 at 11:58:19PM -0700, Christoph Hellwig wrote: > > > On Sat, Oct 19, 2024 at 08:16:44PM -0400, Michael S. Tsirkin wrote: > > > > Because people want to move from some vendor specific solution with vfio > > > > to a standard vdpa compatible one with vdpa. > > > > > > So now you have a want for new use cases and you turn that into a must > > > for supporting completely insecure and dangerous crap. > > > > Nope. > > > > kernel is tainted -> unsupported > > > > whoever supports tainted kernels is already in dangerous waters. > > That's not a carte blanche for doing whatever crazy stuff you > want. > > And if you don't trust me I'll add Greg who has a very clear opinion > on IOMMU-bypassing user I/O hooks in the style of the uio driver as > well I think :) As a supporter of one of uio drivers, I agree with him. -- MST