[Xen-devel] [PATCH 07/13] ARM: Xen: Document UEFI support on Xen ARM virtual platforms
From: David Vrabel <hidden>
Date: 2015-11-17 16:46:43
Also in:
linux-devicetree, linux-efi
On 17/11/15 09:57, shannon.zhao at linaro.org wrote:
From: Shannon Zhao <redacted> Add a "uefi" node under /hypervisor node in FDT, then Linux kernel could scan this to get the UEFI information.
[...]
quoted hunk
--- 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