From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8BFEEC433F5 for ; Fri, 19 Nov 2021 01:53:25 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2632260EFD for ; Fri, 19 Nov 2021 01:53:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 2632260EFD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:47576 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mnt5g-0002oS-6j for qemu-devel@archiver.kernel.org; Thu, 18 Nov 2021 20:53:24 -0500 Received: from eggs.gnu.org ([209.51.188.92]:56080) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mnt4Y-00027x-6y for qemu-devel@nongnu.org; Thu, 18 Nov 2021 20:52:14 -0500 Received: from mga09.intel.com ([134.134.136.24]:53720) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mnt4V-0005XA-UJ for qemu-devel@nongnu.org; Thu, 18 Nov 2021 20:52:13 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10172"; a="234168156" X-IronPort-AV: E=Sophos;i="5.87,246,1631602800"; d="scan'208";a="234168156" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Nov 2021 17:52:10 -0800 X-IronPort-AV: E=Sophos;i="5.87,246,1631602800"; d="scan'208";a="455280881" Received: from dmkresin-mobl1.amr.corp.intel.com (HELO intel.com) ([10.252.138.155]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Nov 2021 17:52:09 -0800 Date: Thu, 18 Nov 2021 17:52:07 -0800 From: Ben Widawsky To: Saransh Gupta1 Subject: Re: Follow-up on the CXL discussion at OFTC Message-ID: <20211119015207.62fhk5mjmvaj5nz4@intel.com> References: <20211117165719.pqig62t5z2grgjvv@intel.com> <20211117173201.00002513@Huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Received-SPF: pass client-ip=134.134.136.24; envelope-from=ben.widawsky@intel.com; helo=mga09.intel.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel@nongnu.org, linux-cxl@vger.kernel.org, Jonathan Cameron Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 21-11-18 15:20:34, Saransh Gupta1 wrote: > Hi Ben and Jonathan, > > Thanks for your replies. I'm looking forward to the patches. > > For QEMU, I see hotplug support as an item on the list and would like to > start working on it. It would be great if you can provide some pointers > about how I should go about it. It's been a while, so I can't recall what's actually missing. I think it should mostly behave like a normal PCIe endpoint. > Also, which version of kernel and QEMU (maybe Jonathan's upcoming version) > would be a good starting point for it? If he rebased and claims it works I have no reason to doubt it :-). I have a small fix on my v4 branch if you want to use the latest port patches. > > Thanks, > Saransh > > > > From: "Jonathan Cameron" > To: "Ben Widawsky" > Cc: "Saransh Gupta1" , , > > Date: 11/17/2021 09:32 AM > Subject: [EXTERNAL] Re: Follow-up on the CXL discussion at OFTC > > > > On Wed, 17 Nov 2021 08:57:19 -0800 > Ben Widawsky wrote: > > > Hi Saransh. Please add the list for these kind of questions. I've > converted your > > HTML mail, but going forward, the list will eat it, so please use text > only. > > > > On 21-11-16 00:14:33, Saransh Gupta1 wrote: > > > Hi Ben, > > > > > > This is Saransh from IBM. Sorry to have (unintentionally) dropped > out > > > of the conversion on OFTC, I'm new to IRC. > > > Just wanted to follow-up on the discussion there. We discussed > about > > > helping with linux patches reviews. On that front, I have > identified > > > some colleague(s) who can help me with this. Let me know if/how you > > > want to proceed with that. > > > > Currently the ball is in my court to re-roll the RFC v2 patches [1] > based on > > feedback from Dan. I've implemented all/most of it, but I'm still > debugging some > > issues with the result. > > > > > > > > Maybe not urgently, but my team would also like to get an > understanding > > > of the missing pieces in QEMU. Initially our focus is on type3 > memory > > > access and hotplug support. Most of the work that my team does is > > > open-source, so contributing to the QEMU effort is another possible > > > line of collaboration. > > > > If you haven't seen it already, check out my LPC talk [2]. The QEMU > patches > > could use a lot of love. Mostly, I have little/no motivation until > upstream > > shows an interest because I don't have time currently to make sure I > don't break > > vs. upstream. If you want more details here, I can provide them, and I > will Cc > > the qemu-devel mailing list; the end of the LPC talk [2] does have a > list. > Hi Ben, Saransh > > I have a forward port of the series + DOE etc to near current QEMU that is > lightly tested, > and can look to push that out publicly later this week. > > I'd also like to push QEMU support forwards and to start getting this > upstream in QEMU > + fill in some of the missing parts. > > Was aiming to make progress on this a few weeks ago, but as ever other > stuff > got in the way. > > +CC qemu-devel in case anyone else also looking at this. > > Jonathan > > > > > > > > > > > Thanks for your help and guidance! > > > > > > Best, > > > Saransh Gupta > > > Research Staff Member, IBM Research > > > > [1]: > https://lore.kernel.org/linux-cxl/20211022183709.1199701-1-ben.widawsky@intel.com/T/#t > > > [2]: > https://www.youtube.com/watch?v=g89SLjt5Bd4&list=PLVsQ_xZBEyN3wA8Ej4BUjudXFbXuxhnfc&index=49 > > > > > >