Messages in this thread | | | Date | Wed, 22 Mar 2023 16:44:17 +0100 | Subject | Re: [PATCH v1 01/14] iommu: Add iommu_get_unmanaged_domain helper | From | Eric Auger <> |
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Hi,
On 3/16/23 20:56, Shameerali Kolothum Thodi wrote: > >> -----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]
I am not aware of any change in the situation.
Thanks
Eric > > 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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