commit 695012903f99d42c03a5bc87fe24f591b6bf7153
author Eric Auger <eric.auger@redhat.com> Thu Mar 07 14:43:05 2024 +0100
committer Michael S. Tsirkin <mst@redhat.com> Tue Mar 12 17:58:30 2024 -0400
tree adc8050244054094583e975e7902b98631a30f08
parent 9dd5e808fc17ac92180965178a6e867c1e96ac57

qemu-options.hx: Document the virtio-iommu-pci granule option

We are missing an entry for the virtio-iommu-pci device. Add the
information on which machine it is currently supported and document
the new granule option.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

Message-Id: <20240307134445.92296-5-eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

qemu-options.hx

diff --git a/qemu-options.hx b/qemu-options.hx
index 937fd7e..c6f3d2e 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1172,6 +1172,14 @@
     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-pci[,option=...]``
+    This is only supported by ``-machine q35`` (x86_64) and ``-machine virt`` (ARM).
+    It supports below options:
+
+    ``granule=val`` (possible values are 4k, 8k, 16k, 64k and host; default: host)
+        This decides the default granule to be be exposed by the
+        virtio-iommu. If host, the granule matches the host page size.
+
 ERST
 
 DEF("name", HAS_ARG, QEMU_OPTION_name,