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iommu/vt-d: Select PCI_PRI for INTEL_IOMMU_SVM

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Previously intel-iommu.c depended on CONFIG_AMD_IOMMU in an undesirable
way.  When CONFIG_INTEL_IOMMU_SVM=y, iommu_enable_dev_iotlb() calls PRI
interfaces (pci_reset_pri() and pci_enable_pri()), but those are only
implemented when CONFIG_PCI_PRI is enabled.

The INTEL_IOMMU_SVM Kconfig did nothing with PCI_PRI, but AMD_IOMMU selects
PCI_PRI.  So if AMD_IOMMU was enabled, intel-iommu.c got the full PRI
interfaces, but if AMD_IOMMU was not enabled, it got the PRI stubs.

Make the iommu_enable_dev_iotlb() behavior independent of AMD_IOMMU by
having INTEL_IOMMU_SVM select PCI_PRI so iommu_enable_dev_iotlb() always
uses the full implementations of PRI interfaces.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Reviewed-by: Joerg Roedel <jroedel@suse.de>
Acked-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Bjorn Helgaas 2019-10-09 15:14:05 -05:00
parent 54ecb8f702
commit fd872843ec
1 changed files with 1 additions and 0 deletions
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drivers/iommu/Kconfig
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@ -207,6 +207,7 @@ config INTEL_IOMMU_SVM
bool "Support for Shared Virtual Memory with Intel IOMMU"
depends on INTEL_IOMMU && X86
select PCI_PASID
select PCI_PRI
select MMU_NOTIFIER
help
Shared Virtual Memory (SVM) provides a facility for devices