PCI: Add implementation for PRI capability

Implement the necessary functions to handle PRI capabilities
on PCIe devices. With PRI devices behind an IOMMU can signal
page fault conditions to software and recover from such
faults.

Reviewed-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 1d8ce8395861..fb1e9707f91e 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -85,6 +85,15 @@ config PCI_IOV
 
           If unsure, say N.
 
+config PCI_PRI
+        bool "PCI PRI support"
+        select PCI_ATS
+        help
+          PRI is the PCI Page Request Interface. It allows PCI devices that are
+          behind an IOMMU to recover from page faults.
+
+          If unsure, say N.
+
 config PCI_IOAPIC
         bool
         depends on PCI