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-rw-r--r--docs/system/arm/virt.rst18
1 files changed, 18 insertions, 0 deletions
diff --git a/docs/system/arm/virt.rst b/docs/system/arm/virt.rst
index 20442ea2c1..1cab33f02e 100644
--- a/docs/system/arm/virt.rst
+++ b/docs/system/arm/virt.rst
@@ -54,6 +54,7 @@ Supported guest CPU types:
 - ``cortex-a15`` (32-bit; the default)
 - ``cortex-a35`` (64-bit)
 - ``cortex-a53`` (64-bit)
+- ``cortex-a55`` (64-bit)
 - ``cortex-a57`` (64-bit)
 - ``cortex-a72`` (64-bit)
 - ``cortex-a76`` (64-bit)
@@ -94,6 +95,23 @@ highmem
   address space above 32 bits. The default is ``on`` for machine types
   later than ``virt-2.12``.
 
+compact-highmem
+  Set ``on``/``off`` to enable/disable the compact layout for high memory regions.
+  The default is ``on`` for machine types later than ``virt-7.2``.
+
+highmem-redists
+  Set ``on``/``off`` to enable/disable the high memory region for GICv3 or
+  GICv4 redistributor. The default is ``on``. Setting this to ``off`` will
+  limit the maximum number of CPUs when GICv3 or GICv4 is used.
+
+highmem-ecam
+  Set ``on``/``off`` to enable/disable the high memory region for PCI ECAM.
+  The default is ``on`` for machine types later than ``virt-3.0``.
+
+highmem-mmio
+  Set ``on``/``off`` to enable/disable the high memory region for PCI MMIO.
+  The default is ``on``.
+
 gic-version
   Specify the version of the Generic Interrupt Controller (GIC) to provide.
   Valid values are: