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PCI: Add support for PASID capability

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Devices supporting Process Address Space Identifiers
(PASIDs) can use an IOMMU to access multiple IO address
spaces at the same time. A PCIe device indicates support for
this feature by implementing the PASID capability. This
patch adds support for the capability to the Linux kernel.

Reviewed-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Joerg Roedel
2011-09-27 15:57:16 +02:00
committed by Jesse Barnes
parent c320b976d7
commit 086ac11f64
4 changed files with 165 additions and 0 deletions
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13
drivers/pci/Kconfig
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@@ -94,6 +94,19 @@ config PCI_PRI
If unsure, say N.
config PCI_PASID
bool "PCI PASID support"
depends on PCI
select PCI_ATS
help
Process Address Space Identifiers (PASIDs) can be used by PCI devices
to access more than one IO address space at the same time. To make
use of this feature an IOMMU is required which also supports PASIDs.
Select this option if you have such an IOMMU and want to compile the
driver for it into your kernel.
If unsure, say N.
config PCI_IOAPIC
bool
depends on PCI