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 C791B2DECDF for ; Tue, 17 Mar 2026 21:34:47 +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=1773783287; cv=none; b=X9x3hRhl6Dcfrro8Hpz9g1KlbvxO+KcGocmUCTuH1xsya3VdHnBzQ1psP3v9XRykrwBozWEUlYEiJoIcXEgUs9k9eeipQqnpnXYz50IO6gkaLIcIqAvSHsmvFYA6dYHaQBfiyGjeYVS/VTx72A7Ttsg1jqUSfhdr+Bji/aC9ncg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773783287; c=relaxed/simple; bh=d0cwXvOjI11ZY13nW3X2ya+7wrMvgoGJkq25vvIj4pc=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=XfqrIqPwjSaqQAh5ASTmvBMNQ+uAGU5OGXWgvthfE5sWhLSdiw5YAr/hTQ6LSly/gOrIS0W0NbdlD6vDOYlQB7CEmLEDl+/WEk0bZX9lf+tMB+acIuriZqTr0wmwgpNhm4uTsEGCErqw9Erc4MLe3/9E96EPBEfGRvxoQxVEGsY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WTEyT+FV; 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="WTEyT+FV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1381EC4CEF7; Tue, 17 Mar 2026 21:34:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773783287; bh=d0cwXvOjI11ZY13nW3X2ya+7wrMvgoGJkq25vvIj4pc=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=WTEyT+FVRbDebvIEc8eunY63FzQAh9RqFry5DQ15FwD4cL4p0ig+Kw5pMGvvJnztu S1XN2wpyhYRlNRCFcXxv25oiZAA3jtNcNHccx6eaa0lKdBOIolbuBc2omzmb7kNHtd f5X5hxEYRSJgZME3eKBUY5MY8gOs1r74JoPse8CgS7BjMCV6Xh0bONXqKtJxHCwJfS 9JbesWbypodYJOEGty6S6zi5/3iKX7g6FL/w/xDHLyA7i9a2E+vzb+qUa6wOPsm3P8 ebn18tzaAUMH2gmsJ3HVWngscGpgnUNhB5FAM1vXuPpkbWBqDpED2jHb80WOj6Q4f9 gU1jPHsz4JOwQ== Date: Tue, 17 Mar 2026 14:34:46 -0700 From: Jakub Kicinski To: Mina Almasry Cc: netdev@vger.kernel.org, Zinc Lim , willemb@google.com Subject: Re: fbnic qemu is open source Message-ID: <20260317143446.4afabb97@kernel.org> In-Reply-To: References: <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 On Tue, 17 Mar 2026 12:41:39 -0700 Mina Almasry wrote: > > 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. > > Wow, very cool! (Sorry I missed this announcement initially) I'm a bit > of a noob but I'm a bit surprised a 'real' driver can work no qemu > with a bit of magic. > > Is fbnic-on-qemu about as feature-rich as fbnic-on-real-hardware? Do > most of what it can do on real hardware it can do on qemu, or is it > just really zerocopy that fully works? We implement the driver and QEMU side by side pre-silicon so the QEMU should cover what the driver can do. Keep in mind it's a pretty simple NIC, even "in the flesh".