Re: [XEN][PATCH v5 03/17] xen/arm: Add CONFIG_OVERLAY_DTB

[Vikram Garhwal <vikram.garhwal@amd.com>]

Hi Michal,

On 4/13/23 2:58 AM, Michal Orzel wrote:
> Hi Vikram,
>
> On 11/04/2023 21:16, Vikram Garhwal wrote:
>>
>> Introduce a config option where the user can enable support for adding/removing
>> device tree nodes using a device tree binary overlay.
>>
>> Signed-off-by: Vikram Garhwal <vikram.garhwal@amd.com>
>> ---
>>   SUPPORT.md           | 6 ++++++
>>   xen/arch/arm/Kconfig | 5 +++++
>>   2 files changed, 11 insertions(+)
>>
>> diff --git a/SUPPORT.md b/SUPPORT.md
>> index aa1940e55f..0a31f40af4 100644
>> --- a/SUPPORT.md
>> +++ b/SUPPORT.md
>> @@ -822,6 +822,12 @@ No support for QEMU backends in a 16K or 64K domain.
>>
>>       Status: Supported
>>
>> +### Device Tree Overlays
>> +
>> +Add/Remove device tree nodes using a device tree overlay binary(.dtbo).
>> +
>> +    Status: Supported for ARM
> Hmm, so here you say supported but in Kconfig - unsupported.
> I think, this should be:
> Status, ARM: Tech Preview
> or Experimental
Experimental sounds better to me.
Will update it.
>> +
>>   ### ARM: Guest ACPI support
>>
>>       Status: Supported
>> diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig
>> index 239d3aed3c..1fe3d698a5 100644
>> --- a/xen/arch/arm/Kconfig
>> +++ b/xen/arch/arm/Kconfig
>> @@ -53,6 +53,11 @@ config HAS_ITS
>>           bool "GICv3 ITS MSI controller support (UNSUPPORTED)" if UNSUPPORTED
>>           depends on GICV3 && !NEW_VGIC && !ARM_32
>>
>> +config OVERLAY_DTB
>> +       bool "DTB overlay support (UNSUPPORTED)" if UNSUPPORTED
>> +       help
>> +         Dynamic addition/removal of Xen device tree nodes using a dtbo.
>> +
>>   config HVM
>>           def_bool y
>>
>> --
>> 2.17.1
>>
>>
> ~Michal