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

Message ID 20211009003711.1390019-15-sathyanarayanan.kuppuswamy@linux.intel.com
State New
Headers show
Series Add TDX Guest Support (shared-mm support) | expand

Commit Message

Kuppuswamy Sathyanarayanan Oct. 9, 2021, 12:37 a.m. UTC 
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(-)
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Patch

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",