[PATCH v2 1/2] [Security Check] vfio/pci: Refine Intel IGD OpRegion support
Gao, Fred
fred.gao at intel.com
Thu Oct 31 16:14:51 UTC 2019
It is true for OpRegion address zero on dGPU.
Change-Id: If1bf77b50ada044114ee00e6151858118f2d3ee8
Signed-off-by: Gao, Fred <fred.gao at intel.com>
---
drivers/vfio/pci/vfio_pci_igd.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/vfio/pci/vfio_pci_igd.c b/drivers/vfio/pci/vfio_pci_igd.c
index 53d97f459252..eff0d3d99832 100644
--- a/drivers/vfio/pci/vfio_pci_igd.c
+++ b/drivers/vfio/pci/vfio_pci_igd.c
@@ -63,7 +63,11 @@ static int vfio_pci_igd_opregion_init(struct vfio_pci_device *vdev)
if (ret)
return ret;
- if (!addr || !(~addr))
+ /* addr =0 for dGPU with expansion ROM */
+ if (!addr)
+ return 0;
+
+ if (!(~addr))
return -ENODEV;
base = memremap(addr, OPREGION_SIZE, MEMREMAP_WB);
--
2.17.1
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