# \[PATCH v5 14/16\] virtio: Use shared mappings for virtio PCI devices - From: Kuppuswamy Sathyanarayanan \ - Date: 2021-10-09 00:39:00 - List: linux-doc - Page: https://ratatoskr.run/linux-doc/2021/10/1536012 - Thread: https://ratatoskr.run/linux-pci/2021/10/1535998/t.md ```text From: Andi Kleen 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 Signed-off-by: Kuppuswamy Sathyanarayanan --- 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 ```