61 lines
2.8 KiB
Plaintext
Executable file
61 lines
2.8 KiB
Plaintext
Executable file
* Xen hypervisor device tree bindings
|
|
|
|
Xen ARM virtual platforms shall have a top-level "hypervisor" node with
|
|
the following properties:
|
|
|
|
- compatible:
|
|
compatible = "xen,xen-<version>", "xen,xen";
|
|
where <version> is the version of the Xen ABI of the platform.
|
|
|
|
- reg: specifies the base physical address and size of a region in
|
|
memory where the grant table should be mapped to, using an
|
|
HYPERVISOR_memory_op hypercall. The memory region is large enough to map
|
|
the whole grant table (it is larger or equal to gnttab_max_grant_frames()).
|
|
This property is unnecessary when booting Dom0 using ACPI.
|
|
|
|
- interrupts: the interrupt used by Xen to inject event notifications.
|
|
A GIC node is also required.
|
|
This property is unnecessary when booting Dom0 using ACPI.
|
|
|
|
To support UEFI on Xen ARM virtual platforms, Xen populates the FDT "uefi" node
|
|
under /hypervisor with following parameters:
|
|
|
|
________________________________________________________________________________
|
|
Name | Size | Description
|
|
================================================================================
|
|
xen,uefi-system-table | 64-bit | Guest physical address of the UEFI System
|
|
| | Table.
|
|
--------------------------------------------------------------------------------
|
|
xen,uefi-mmap-start | 64-bit | Guest physical address of the UEFI memory
|
|
| | map.
|
|
--------------------------------------------------------------------------------
|
|
xen,uefi-mmap-size | 32-bit | Size in bytes of the UEFI memory map
|
|
| | pointed to in previous entry.
|
|
--------------------------------------------------------------------------------
|
|
xen,uefi-mmap-desc-size | 32-bit | Size in bytes of each entry in the UEFI
|
|
| | memory map.
|
|
--------------------------------------------------------------------------------
|
|
xen,uefi-mmap-desc-ver | 32-bit | Version of the mmap descriptor format.
|
|
--------------------------------------------------------------------------------
|
|
|
|
Example (assuming #address-cells = <2> and #size-cells = <2>):
|
|
|
|
hypervisor {
|
|
compatible = "xen,xen-4.3", "xen,xen";
|
|
reg = <0 0xb0000000 0 0x20000>;
|
|
interrupts = <1 15 0xf08>;
|
|
uefi {
|
|
xen,uefi-system-table = <0xXXXXXXXX>;
|
|
xen,uefi-mmap-start = <0xXXXXXXXX>;
|
|
xen,uefi-mmap-size = <0xXXXXXXXX>;
|
|
xen,uefi-mmap-desc-size = <0xXXXXXXXX>;
|
|
xen,uefi-mmap-desc-ver = <0xXXXXXXXX>;
|
|
};
|
|
};
|
|
|
|
The format and meaning of the "xen,uefi-*" parameters are similar to those in
|
|
Documentation/arm/uefi.txt, which are provided by the regular UEFI stub. However
|
|
they differ because they are provided by the Xen hypervisor, together with a set
|
|
of UEFI runtime services implemented via hypercalls, see
|
|
http://xenbits.xen.org/docs/unstable/hypercall/x86_64/include,public,platform.h.html.
|