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 647CB36A03B for ; Mon, 9 Mar 2026 18:38:54 +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=1773081534; cv=none; b=HW0OQrN8FXSMFr4sqJnxNL252kEXiD5f+EnUiJQPTuiCBhKy2i1xq5mMKYII4B9xmYv/NTr630ul/DTpweZnD9daIsHwvLhLt4ise4aADWWhKOEq3QTqmE41Q8uvroP+E6X43tcTyTDyFbJlLnVQZXxEhBh1F/8LW32fs98aX7A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773081534; c=relaxed/simple; bh=u9PZ/S/J6TXY5p5L9CZM80gR87hsjsurTArWYLMzZNE=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type; b=pvSxG0+owOr7jb0pCxGOP+HSJhFDp4+NBJS65DE6kZ8iEiIEGVmfU9zh1/yUJ1acXexSuUM3rNhYtMReJX/DJuAGomiqlbjHrU/DT4b+V7BNkZo6+5HFl3cPh1WoPCsv2zwGgA/BRKSuR9CoBeWdI6e0l67QAvNX5FCyURc7Stw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JD1mKNXx; 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="JD1mKNXx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D566AC4CEF7; Mon, 9 Mar 2026 18:38:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773081534; bh=u9PZ/S/J6TXY5p5L9CZM80gR87hsjsurTArWYLMzZNE=; h=Date:From:To:Cc:Subject:From; b=JD1mKNXxHKbnH3PoJgkfogSbXgLldv9lQhCMN3tdBW+03jBO2TQQij7YFBZl7Mo96 eDU3OGUZjYsYiaKiGG+liw2loJSPaKAfujILTYnTX2CKSnObvrlQsnEvCt21FXbQtn KN993sMAL1eauBoHRbYkwah7grntVkJtHRr6D8a+2a3anJeDNXlc0Ff8BeY053/RS5 QBNiWqTQi2BP792zSy8mDrNDnIBay3lS8TesXIHrVSVJ9TuHiLcUfbpXUJ9Qb2tw14 W+W0HURhUkP0V02IQDWGtwUI4NbgKvaZTDiqv+jZNNeXEw9E0pE8CrlyvZtbRSUFFp v3Smourcad0og== Date: Mon, 9 Mar 2026 11:38:52 -0700 From: Jakub Kicinski To: netdev@vger.kernel.org Cc: Zinc Lim , almasrymina@google.com, willemb@google.com Subject: fbnic qemu is open source Message-ID: <20260309113852.2c654de5@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Hi! The fbnic QEMU repo is now open source and available at: https://github.com/facebook/fbnic_qemu It contains the emulated datapath for the fbnic device, the FW components are not included (PHY programming, NC-SI, init, sensors and such). The main practical use I imagine is being able to test TCP Rx zero copy (kernel and/or user space) without any HW dependency. There's work on adding relevant features to virtio but it's going a little slowly. Also being able to test code and selftests with a more "real" device than netdevsim with vng is super convenient :) Big thanks to Zinc Lim for the open source heavy lifting (isolating and mocking out the FW parts, cleaning up the code base and getting it thru corporate reviews). No plans at this stage to upstream it to QEMU because TBH I don't expect that QEMU would care to carry random HW emulation drivers. Sorry if the announcement is a bit self-serving but folks expressed interest off list in being able to test the queue API and zero-copy Rx without real HW so I thought it's relevant.