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| author | Felix Kuehling <Felix.Kuehling@amd.com> | 2018-09-10 15:27:42 -0400 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2018-09-11 21:46:49 -0500 |
| commit | 9d27e39d309c93025ae6aa97236af15bef2a5f1f (patch) | |
| tree | 736a1338ecad107635482875990a02a75e82d7c0 /drivers/pci | |
| parent | bfc456060d0cbcf6902a436d358b60cb1534668c (diff) | |
| download | linux-9d27e39d309c93025ae6aa97236af15bef2a5f1f.tar.gz | |
PCI: Fix enabling of PASID on RC integrated endpoints
Set the eetlp_prefix_path on PCIE_EXP_TYPE_RC_END devices to allow PASID
to be enabled on them. This fixes IOMMUv2 initialization on AMD Carrizo
APUs.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=201079
Fixes: 7ce3f912ae ("PCI: Enable PASID only if entire path supports End-End TLP prefixes")
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/probe.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index ec784009a36b..201f9e5ff55c 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -2074,6 +2074,7 @@ static void pci_configure_eetlp_prefix(struct pci_dev *dev) { #ifdef CONFIG_PCI_PASID struct pci_dev *bridge; + int pcie_type; u32 cap; if (!pci_is_pcie(dev)) @@ -2083,7 +2084,9 @@ static void pci_configure_eetlp_prefix(struct pci_dev *dev) if (!(cap & PCI_EXP_DEVCAP2_EE_PREFIX)) return; - if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) + pcie_type = pci_pcie_type(dev); + if (pcie_type == PCI_EXP_TYPE_ROOT_PORT || + pcie_type == PCI_EXP_TYPE_RC_END) dev->eetlp_prefix_path = 1; else { bridge = pci_upstream_bridge(dev); |