Messages in this thread |  | | From | "Tian, Kevin" <> | Subject | RE: [PATCH v3 02/11] iommu/vt-d: Remove clearing translation data in disable_dmar_iommu() | Date | Fri, 1 Jul 2022 07:58:03 +0000 |
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> From: Lu Baolu <baolu.lu@linux.intel.com> > Sent: Wednesday, June 29, 2022 3:47 PM > > The disable_dmar_iommu() is called when IOMMU initialization fails or > the IOMMU is hot-removed from the system. In both cases, there is no > need to clear the IOMMU translation data structures for devices. > > On the initialization path, the device probing only happens after the > IOMMU is initialized successfully, hence there're no translation data > structures. > > On the hot-remove path, there is no real use case where the IOMMU is > hot-removed, but the devices that it manages are still alive in the > system. The translation data structures were torn down during device > release, hence there's no need to repeat it in IOMMU hot-remove path > either. This removes the unnecessary code and only leaves a check. > > Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
You probably overlooked my last comment on kexec:
https://lore.kernel.org/lkml/BL1PR11MB52711A71AD9F11B7AE42694C8CAC9@BL1PR11MB5271.namprd11.prod.outlook.com/
I think my question is still not answered.
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