Messages in this thread | | | From | Shameerali Kolothum Thodi <> | Subject | RE: [PATCH v1 01/14] iommu: Add iommu_get_unmanaged_domain helper | Date | Thu, 16 Mar 2023 19:56:34 +0000 |
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> -----Original Message----- > From: Nicolin Chen [mailto:nicolinc@nvidia.com] > Sent: 16 March 2023 19:51 > To: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>; > Eric Auger <eric.auger@redhat.com> > Cc: Jason Gunthorpe <jgg@nvidia.com>; 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 > > Hi Shameer/Eric, > > On Fri, Mar 10, 2023 at 04:30:03PM +0000, Shameerali Kolothum Thodi > wrote: > > External email: Use caution opening links or attachments > > > > > > > -----Original Message----- > > > From: Jason Gunthorpe [mailto:jgg@nvidia.com] > > > Sent: 10 March 2023 16:21 > > > To: Shameerali Kolothum Thodi > <shameerali.kolothum.thodi@huawei.com> > > > Cc: Eric Auger <eric.auger@redhat.com>; Nicolin Chen > > > <nicolinc@nvidia.com>; 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-shame > > > er > > > > > > 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-65290 > > 78da97d@redhat.com/ > > Have we fixed the issue? I saw Lorenzo replying in that thread: > https://lore.kernel.org/linux-arm-kernel/Yi8nV8H4Jjlpadmk@lpieralisi/ > > Or, what's remaining here regarding this topic? Is it a blocker?
[+Lorenzo]
Not sure it is fixed yet. Also, assuming we take RMR path, do we plan to support DT base Guests at all?
Thanks, Shameer
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