[PATCH v1 1/2] vfio/pci: Expose PCIe PASID capability to guest

Liu, Yi L
2020-03-22T12:27:37Z

From: Liu Yi L <yi.l.liu@intel.com>

This patch exposes PCIe PASID capability to guest. Existing vfio_pci
driver hides it from guest by setting the capability length as 0 in
pci_ext_cap_length[].

This capability is required for vSVA enabling on pass-through PCIe
devices.

Cc: Kevin Tian <kevin.tian@intel.com>
CC: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Eric Auger <eric.auger@redhat.com>
Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
---
drivers/vfio/pci/vfio_pci_config.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vfio/pci/vfio_pci_config.c b/drivers/vfio/pci/vfio_pci_config.c
index 90c0b80..4b9af99 100644
--- a/drivers/vfio/pci/vfio_pci_config.c
+++ b/drivers/vfio/pci/vfio_pci_config.c
@@ -95,7 +95,7 @@ static const u16 pci_ext_cap_length[PCI_EXT_CAP_ID_MAX + 1] = {
[PCI_EXT_CAP_ID_LTR] = PCI_EXT_CAP_LTR_SIZEOF,
[PCI_EXT_CAP_ID_SECPCI] = 0, /* not yet */
[PCI_EXT_CAP_ID_PMUX] = 0, /* not yet */
- [PCI_EXT_CAP_ID_PASID] = 0, /* not yet */
+ [PCI_EXT_CAP_ID_PASID] = PCI_EXT_CAP_PASID_SIZEOF,
};

/*
--
2.7.4