[Xen-devel] [PATCH 07/13] ARM: Xen: Document UEFI support on Xen ARM virtual platforms
David Vrabel
david.vrabel at citrix.com
Tue Nov 17 08:46:43 PST 2015
On 17/11/15 09:57, shannon.zhao at linaro.org wrote:
> From: Shannon Zhao <shannon.zhao at linaro.org>
>
> Add a "uefi" node under /hypervisor node in FDT, then Linux kernel could
> scan this to get the UEFI information.
[...]
> --- a/Documentation/devicetree/bindings/arm/xen.txt
> +++ b/Documentation/devicetree/bindings/arm/xen.txt
> @@ -15,6 +15,24 @@ the following properties:
> - interrupts: the interrupt used by Xen to inject event notifications.
> A GIC node is also required.
>
> +To support UEFI on Xen ARM virtual platforms, Xen pupulates the FDT "uefi" node
> +under /hypervisor with following parameters:
It's not really clear why this is under /hypervisor and why xen needs to
define its own nodes.
The handling of the existing linux standard nodes can be made
Xen-specific by the presence of the /hypervisor/compatible == "xen" node
(or similar), right?
> +________________________________________________________________________________
> +Name | Size | Description
> +================================================================================
> +xen,uefi-system-table | 64-bit | Physical address of the UEFI System Table.
> +--------------------------------------------------------------------------------
> +xen,uefi-mmap-start | 64-bit | Physical address of the UEFI memory map.
> +--------------------------------------------------------------------------------
I would probably say "Guest physical address..." just to be clear.
> +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.
> +--------------------------------------------------------------------------------
Need a reference to the mmap descriptor format here.
David
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