[v4] dynamic node programming using overlay dtbo

[XEN][RFC PATCH v4 02/16] xen/arm: Add CONFIG_OVERLAY_DTB

Posted by Vikram Garhwal 1 year, 11 months ago

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>
---
 xen/arch/arm/Kconfig | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig
index 1fe5faf847..ae2ebf1697 100644
--- a/xen/arch/arm/Kconfig
+++ b/xen/arch/arm/Kconfig
@@ -52,6 +52,11 @@ config HAS_ITS
         bool "GICv3 ITS MSI controller support (UNSUPPORTED)" if UNSUPPORTED
         depends on GICV3 && !NEW_VGIC
 
+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

Re: [XEN][RFC PATCH v4 02/16] xen/arm: Add CONFIG_OVERLAY_DTB

Posted by Julien Grall 1 year, 9 months ago

Hi,

On 07/12/2022 06:15, 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>
> ---
>   xen/arch/arm/Kconfig | 5 +++++

You also want to update SUPPORT.md.

>   1 file changed, 5 insertions(+)
> 
> diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig
> index 1fe5faf847..ae2ebf1697 100644
> --- a/xen/arch/arm/Kconfig
> +++ b/xen/arch/arm/Kconfig
> @@ -52,6 +52,11 @@ config HAS_ITS
>           bool "GICv3 ITS MSI controller support (UNSUPPORTED)" if UNSUPPORTED
>           depends on GICV3 && !NEW_VGIC
>   
> +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
>   

Cheers,

-- 
Julien Grall

Re: [XEN][RFC PATCH v4 02/16] xen/arm: Add CONFIG_OVERLAY_DTB

Posted by Michal Orzel 1 year, 10 months ago

Hi Vikram,

On 07/12/2022 07:15, 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>
> ---
>  xen/arch/arm/Kconfig | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig
> index 1fe5faf847..ae2ebf1697 100644
> --- a/xen/arch/arm/Kconfig
> +++ b/xen/arch/arm/Kconfig
> @@ -52,6 +52,11 @@ config HAS_ITS
>          bool "GICv3 ITS MSI controller support (UNSUPPORTED)" if UNSUPPORTED
>          depends on GICV3 && !NEW_VGIC
> 
> +config OVERLAY_DTB
> +    bool "DTB overlay support (UNSUPPORTED)" if UNSUPPORTED
> +    help
> +    Dynamic addition/removal of Xen device tree nodes using a dtbo.
help text should be indented by a tab and 2 spaces.

> +
>  config HVM
>          def_bool y
> 
> --
> 2.17.1
> 
> 

~Michal