[PATCH v2 8/8] docs: Add '-device virtio-iommu' entry

[Jean-Philippe Brucker]

Document the virtio-iommu device for qemu-system-x86_64. In particular
note the lack of interrupt remapping, which may be an important
limitation on x86.

Suggested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
 qemu-options.hx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/qemu-options.hx b/qemu-options.hx
index 83aa59a920..9a1906a748 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -976,6 +976,9 @@ SRST
     Please also refer to the wiki page for general scenarios of VT-d
     emulation in QEMU: https://wiki.qemu.org/Features/VT-d.
 
+``-device virtio-iommu``
+    Enable a paravirtual IOMMU, that manages DMA isolation and remapping
+    for all PCI devices, but does not support interrupt remapping.
 ERST
 
 DEF("name", HAS_ARG, QEMU_OPTION_name,
-- 
2.33.0