From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 41818212B1F; Wed, 5 Feb 2025 02:06:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738721168; cv=none; b=QKV/6k3dAfN5EK79b1vhgXlT8dFy/k+8J5ChdzXxUz/3taMrIuJFI6K5ayklkcTkftX+Zsn73RFhxbwolWpuuHRxjtocILX6iStgPTLDm8pWMscMn1WZ00z9PO9URVsePLptHSplhul8xnejdVW8beq+CS92ti0jPe9Z76WL+qM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738721168; c=relaxed/simple; bh=g/MZNgeG47rEDHzwtuKkaPDvwcYnBFmBeL4Dnw2TTwQ=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=TgBVsXjZs863dt4TgoSvTUMf49bodNBGM/Gd95Ly6PFTaEXegCAdPz3oqdWtOUjDPjnowwoI2VT/PimSfkSMqYXSSrR7W/u8Uyq0ieW17B7Q0WVMgoN5pNRuCdaJh9D4UKpYuUB+5v/OaSnCnMwJhs+835fw8+zBpC7IapjXDdM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=f5nDGIfb; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="f5nDGIfb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6171BC4CEDF; Wed, 5 Feb 2025 02:06:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738721168; bh=g/MZNgeG47rEDHzwtuKkaPDvwcYnBFmBeL4Dnw2TTwQ=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=f5nDGIfbkYWYtpJTxIXjgqSOpvUVgjXcNyoLY4kBNZqYhrWBhgHshE0CocdnbP8qW NusCCF/whBR1MMPCuEHEEuMVtmWQaejCi0hILMO8zuh5IEHye3hMMo9JHfpb0Dt2Ob 88buMz7DMWFN6fUDEJHB3q0bN5/3UmAOoDfVtZYXoaHPX2iCQtfOmX11KwEO9r590x 1Dxl3fwauA5YO4lyGOJ1A6SB84KvqL+KY8hJhuGAG8X7gb0668kzHwJmMxAmQTYMdH owE7Qc+1W+JjXOM0X2yerYHm+Vnlfk/ECWyuraJNBZMIMTPfRRToETAP6Cu0nudK6X pfa2LOjYB+VSw== Date: Tue, 4 Feb 2025 18:06:05 -0800 From: Jakub Kicinski To: Stanislav Fomichev Cc: Mina Almasry , Paolo Abeni , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux.dev, linux-kselftest@vger.kernel.org, Donald Hunter , "David S. Miller" , Eric Dumazet , Simon Horman , Jonathan Corbet , Andrew Lunn , Neal Cardwell , David Ahern , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , Eugenio =?UTF-8?B?UMOpcmV6?= , Stefan Hajnoczi , Stefano Garzarella , Shuah Khan , sdf@fomichev.me, asml.silence@gmail.com, dw@davidwei.uk, Jamal Hadi Salim , Victor Nogueira , Pedro Tammela , Samiullah Khawaja Subject: Re: [PATCH net-next v3 0/6] Device memory TCP TX Message-ID: <20250204180605.268609c9@kernel.org> In-Reply-To: References: <20250203223916.1064540-1-almasrymina@google.com> <60550f27-ea6a-4165-8eaa-a730d02a5ddc@redhat.com> Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Tue, 4 Feb 2025 11:41:09 -0800 Stanislav Fomichev wrote: > > > Don't we need some way for the device to opt-in (or opt-out) and avoid > > > such issues? > > > > > > > Yeah, I think likely the driver needs to declare support (i.e. it's > > not using dma-mapping API with dma-buf addresses). > > netif_skb_features/ndo_features_check seems like a good fit? validate_xmit_skb()