Re: [RFC PATCH v2 38/48] lib: Kconfig: add a config symbol for getting lmb memory map updates

[Tom Rini <trini@konsulko.com>]

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On Thu, Jul 04, 2024 at 01:05:34PM +0530, Sughosh Ganu wrote:

> Add a Kconfig symbol to enable getting updates on any memory map
> changes that might be done by the LMB module. This notification
> mechanism can then be used to have a synchronous view of allocated and
> free memory.
> 
> Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
> ---
> Changes since V1:
> * Change the description to highlight only LMB notifications.
> * Add a separate line for dependencies.
> 
>  lib/Kconfig | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/lib/Kconfig b/lib/Kconfig
> index 7eea517b3b..b422183a0f 100644
> --- a/lib/Kconfig
> +++ b/lib/Kconfig
> @@ -74,6 +74,16 @@ config HAVE_PRIVATE_LIBGCC
>  config LIB_UUID
>  	bool
>  
> +config MEM_MAP_UPDATE_NOTIFY
> +	bool "Get notified of any changes to the LMB memory map"
> +	depends on EVENT && LMB && EFI_LOADER
> +	default y
> +	help
> +	  Enable this option to get notification on any changes to the
> +	  memory that is allocated or freed by the LMB module. This will
> +	  allow different modules that allocate memory or maintain a memory
> +	  map to have a synchronous view of available and allocated memory.

This needs to be select'd when it's going to be used, opting out of
making sure memory reservations are obeyed isn't a good idea.

-- 
Tom

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