doc: add note about running as non-root in virtio guide

The requirement of SYS_ADMIN capability in legacy virtio mode
was missing. Add it to the driver-specific page.

Signed-off-by: Dmitry Kozlyuk <dkozlyuk@nvidia.com>

diff --git a/doc/guides/nics/virtio.rst b/doc/guides/nics/virtio.rst
index 7c0ae2b..aace780 100644 (file)
--- a/doc/guides/nics/virtio.rst
+++ b/doc/guides/nics/virtio.rst
@@ -86,6 +86,9 @@ The following prerequisites apply:
 *   Linux kernel with KVM module; vhost module loaded and ioeventfd supported.
     Qemu standard backend without vhost support isn't tested, and probably isn't supported.
 
+*   When using legacy interface, ``SYS_RAWIO`` capability is required
+    for ``iopl()`` call to enable access to PCI I/O ports.
+
 Virtio with kni vhost Back End
 ------------------------------