Update the documentation to match current QEMU.

Remove the mention of pre-2.7 machine models as those aren't provided
anymore.

Signed-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>
---
 docs/system/arm/virt.rst | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/docs/system/arm/virt.rst b/docs/system/arm/virt.rst
index 10cbffc8a7..fe95be991e 100644
--- a/docs/system/arm/virt.rst
+++ b/docs/system/arm/virt.rst
@@ -40,9 +40,10 @@ The virt board supports:
 - An optional SMMUv3 IOMMU
 - hotpluggable DIMMs
 - hotpluggable NVDIMMs
-- An MSI controller (GICv2M or ITS). GICv2M is selected by default along
-  with GICv2. ITS is selected by default with GICv3 (>= virt-2.7). Note
-  that ITS is not modeled in TCG mode.
+- An MSI controller (GICv2m or ITS).
+  - When using a GICv3, ITS is selected by default when available on the platform.
+  - If using a GICv2 or when ITS is not available, a GICv2m is provided by default instead.
+  - Before virt-10.2, a GICv2m is not provided when the ITS is disabled.
 - 32 virtio-mmio transport devices
 - running guests using the KVM accelerator on aarch64 hardware
 - large amounts of RAM (at least 255GB, and more if using highmem)
@@ -167,8 +168,7 @@ gic-version
     ``4`` if ``virtualization`` is ``on``, but this may change in future)
 
 its
-  Set ``on``/``off`` to enable/disable ITS instantiation. The default is ``on``
-  for machine types later than ``virt-2.7``.
+  Set ``on``/``off``/``auto`` to control ITS instantiation. The default is ``auto``.
 
 iommu
   Set the IOMMU type to create for the guest. Valid values are:
-- 
2.50.1 (Apple Git-155)