Messages in this thread | | | From | "Tian, Kevin" <> | Subject | RE: [PATCH 1/1] iommu/vt-d: Disable PCI ATS in legacy passthrough mode | Date | Tue, 14 Nov 2023 03:14:57 +0000 |
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> From: Lu Baolu <baolu.lu@linux.intel.com> > Sent: Tuesday, November 14, 2023 9:11 AM > > When IOMMU hardware operates in legacy mode, the TT field of the context > entry determines the translation type, with three supported types (Section > 9.3 Context Entry): > > - DMA translation without device TLB support > - DMA translation with device TLB support > - Passthrough mode with translated and translation requests blocked > > Device TLB support is absent when hardware is configured in passthrough > mode. > > Disable the PCI ATS feature when IOMMU is configured for passthrough > translation type in legacy (non-scalable) mode. > > Fixes: 0faa19a1515f ("iommu/vt-d: Decouple PASID & PRI enabling from SVA") > Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
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