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Re: [PATCH] arm/docs: Clarify legacy DT bindings on UEFI



Hi Luca,

On 13/10/2021 13:19, Luca Fancellu wrote:
Legacy compatible strings for dom0 modules are not
supported when booting using UEFI, the documentation
doesn't mention that.

Can you add a summary in the commit message why we consider the legacy binding is not supported?


Add a phrase to docs/misc/arm/device-tree/booting.txt
to clarify it.

Signed-off-by: Luca Fancellu <luca.fancellu@xxxxxxx>
---
  docs/misc/arm/device-tree/booting.txt | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/docs/misc/arm/device-tree/booting.txt 
b/docs/misc/arm/device-tree/booting.txt
index c6a775f4e8..017c0f13eb 100644
--- a/docs/misc/arm/device-tree/booting.txt
+++ b/docs/misc/arm/device-tree/booting.txt
@@ -51,6 +51,8 @@ Each node contains the following properties:
        Xen 4.4 supported a different set of legacy compatible strings
        which remain supported such that systems supporting both 4.4
        and later can use a single DTB.
+       However when booting Xen using UEFI and Device Tree, the legacy

NIT: I would drop "and Device Tree" because this feels a bit redundant as this compatible can only be used in the Device-Tree.

+       compatible strings are not supported.
- "xen,multiboot-module" equivalent to "multiboot,module"
        - "xen,linux-zimage"     equivalent to "multiboot,kernel"


Cheers,

--
Julien Grall



 


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