[PATCH v5 14/16] virtio: Use shared mappings for virtio PCI devices

Kuppuswamy Sathyanarayanan
2021-10-09T00:39:00Z

From: Andi Kleen <ak@linux.intel.com>

In a TDX guest the pci device mappings of virtio must be shared
with the host, so use explicit shared mappings.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
---

Changes since v4:
* Replaced pci_iomap_shared_range() with pci_iomap_host_shared_range().

drivers/virtio/virtio_pci_modern_dev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/virtio/virtio_pci_modern_dev.c b/drivers/virtio/virtio_pci_modern_dev.c
index e11ed748e661..f29bf45a4642 100644
--- a/drivers/virtio/virtio_pci_modern_dev.c
+++ b/drivers/virtio/virtio_pci_modern_dev.c
@@ -83,7 +83,7 @@ vp_modern_map_capability(struct virtio_pci_modern_device *mdev, int off,
return NULL;
}

- p = pci_iomap_range(dev, bar, offset, length);
+ p = pci_iomap_host_shared_range(dev, bar, offset, length);
if (!p)
dev_err(&dev->dev,
"virtio_pci: unable to map virtio %u@%u on bar %i\n",
--
2.25.1