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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16DF0C6FA99 for ; Fri, 10 Mar 2023 16:34:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231637AbjCJQeL convert rfc822-to-8bit (ORCPT ); Fri, 10 Mar 2023 11:34:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58730 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230104AbjCJQdm (ORCPT ); Fri, 10 Mar 2023 11:33:42 -0500 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 083FD13131A for ; Fri, 10 Mar 2023 08:31:13 -0800 (PST) Received: from lhrpeml100004.china.huawei.com (unknown [172.18.147.200]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4PYBNK5FzGz67LM6; Sat, 11 Mar 2023 00:29:53 +0800 (CST) Received: from lhrpeml500005.china.huawei.com (7.191.163.240) by lhrpeml100004.china.huawei.com (7.191.162.219) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.21; Fri, 10 Mar 2023 16:30:03 +0000 Received: from lhrpeml500005.china.huawei.com ([7.191.163.240]) by lhrpeml500005.china.huawei.com ([7.191.163.240]) with mapi id 15.01.2507.021; Fri, 10 Mar 2023 16:30:03 +0000 From: Shameerali Kolothum Thodi To: Jason Gunthorpe CC: Eric Auger , Nicolin Chen , "robin.murphy@arm.com" , "will@kernel.org" , "kevin.tian@intel.com" , "baolu.lu@linux.intel.com" , "joro@8bytes.org" , "jean-philippe@linaro.org" , "linux-arm-kernel@lists.infradead.org" , "iommu@lists.linux.dev" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH v1 01/14] iommu: Add iommu_get_unmanaged_domain helper Thread-Topic: [PATCH v1 01/14] iommu: Add iommu_get_unmanaged_domain helper Thread-Index: AQHZUnWRmBwtrmleCk69JH8tQLhaPq7zzWuAgABY2gCAAAIMsIAABIwAgAABG+CAAAW9gIAAAcuw Date: Fri, 10 Mar 2023 16:30:03 +0000 Message-ID: References: <9b1077601cace998533129327f5e7ad946752d29.1678348754.git.nicolinc@nvidia.com> In-Reply-To: Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.202.227.178] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > -----Original Message----- > From: Jason Gunthorpe [mailto:jgg@nvidia.com] > Sent: 10 March 2023 16:21 > To: Shameerali Kolothum Thodi > Cc: Eric Auger ; Nicolin Chen > ; robin.murphy@arm.com; will@kernel.org; > kevin.tian@intel.com; baolu.lu@linux.intel.com; joro@8bytes.org; > jean-philippe@linaro.org; linux-arm-kernel@lists.infradead.org; > iommu@lists.linux.dev; linux-kernel@vger.kernel.org > Subject: Re: [PATCH v1 01/14] iommu: Add iommu_get_unmanaged_domain > helper > > On Fri, Mar 10, 2023 at 04:07:38PM +0000, Shameerali Kolothum Thodi > wrote: > > > > https://lore.kernel.org/linux-arm-kernel/20220420164836.1181-5-shameer > > > > ali.kolothum.thodi@huawei.com/ > > > > > > So "boot configration" is more like "don't change the RIDs"? Ie don't > enable > > > SRIOV? > > > > Yes. Don't think it will work with SR-IOV if you can't guarantee the RMR > specified > > SID. > > So I think we are probably good them because vSR-IOV is already not > supported by qemu, so it impossible for a VM to change the PCI > configuration in a way that would alter the RID to SID mapping? > Provided we fix the issue mentioned by Eric. This was discussed here previously, https://lore.kernel.org/linux-arm-kernel/bb3688c7-8f42-039e-e22f-6529078da97d@redhat.com/ Thanks, Shameer