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Mon, 16 Nov 2020 15:53:43 +0000 Date: Mon, 16 Nov 2020 11:53:41 -0400 From: Jason Gunthorpe To: Peter Xu CC: Cornelia Huck , , Tom Lendacky , Alex Williamson Subject: Re: [PATCH] vfio-pci: Use io_remap_pfn_range() for PCI IO memory Message-ID: <20201116155341.GL917484@nvidia.com> References: <0-v1-331b76591255+552-vfio_sme_jgg@nvidia.com> <20201105233949.GA138364@xz-x1> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20201105233949.GA138364@xz-x1> X-ClientProxiedBy: BL0PR0102CA0040.prod.exchangelabs.com (2603:10b6:208:25::17) To DM6PR12MB3834.namprd12.prod.outlook.com (2603:10b6:5:14a::12) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from mlx.ziepe.ca (156.34.48.30) by BL0PR0102CA0040.prod.exchangelabs.com (2603:10b6:208:25::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3564.25 via Frontend Transport; Mon, 16 Nov 2020 15:53:43 +0000 Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1kegp3-006Ekn-VW; Mon, 16 Nov 2020 11:53:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1605542030; bh=Bd6Zo/KZcJ5FmC5bDXXm5xzoOXOWDlz9kA+rDYDFmN8=; h=ARC-Seal:ARC-Message-Signature:ARC-Authentication-Results:Date: From:To:CC:Subject:Message-ID:References:Content-Type: Content-Disposition:In-Reply-To:X-ClientProxiedBy:MIME-Version: X-MS-Exchange-MessageSentRepresentingType; b=M+KjPnSwMT+c7tYsj1ETklNExTGajsjfaX/TpSi+7CL4fgLJYtufCwChaFarAOg03 47kFUz6z+h02xi1THKenzDSTDWp9mUgVGN/avUm8EqgzHTR/QrtJNbQMgv7y3o0ECD nPRG7WZXJfdc9ZgV/Jgl81cI6i/PE0C2yTCld6k1qxVHzymqxVEOxxL07YgbRSLvdA W2egGg5R7A8dV3OmkKezHtGxr8uYYr3vGCvcCMOjGzcZDjyTlCdzhk8JScJhOed78z GUTaJxTQ1SUmv/zPL+/SFxxbt0uVO8woHuEsdPsCT0p0YsUeI/UbOcMat9ETmqb0ka X0qNauOVPNRow== Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Thu, Nov 05, 2020 at 06:39:49PM -0500, Peter Xu wrote: > On Thu, Nov 05, 2020 at 12:34:58PM -0400, Jason Gunthorpe wrote: > > Tom says VFIO device assignment works OK with KVM, so I expect only things > > like DPDK to be broken. > > Is there more information on why the difference? Thanks, I have nothing, maybe Tom can explain how it works? Jason