[PATCH v9 5/5] KVM: arm64: Introduce the PTDUMP_STAGE2_DEBUGFS config

[Vincent Donnefort]

On Tue, Aug 27, 2024 at 08:45:48AM +0000, Sebastian Ene wrote:
> When this config is enabled, it exposes the stage-2 pagetable layout
> through a debugfs file.
> 
> Signed-off-by: Sebastian Ene <sebastianene at google.com>

It doesn't feel like having a separated patch for Kconfig brings anything and
I would have squashed it with the previous change.

Otherwise:

Reviewed-by: Vincent Donnefort <vdonnefort at google.com>

> ---
>  arch/arm64/kvm/Kconfig | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig
> index 8304eb342be9..ead632ad01b4 100644
> --- a/arch/arm64/kvm/Kconfig
> +++ b/arch/arm64/kvm/Kconfig
> @@ -66,4 +66,21 @@ config PROTECTED_NVHE_STACKTRACE
>  
>  	  If unsure, or not using protected nVHE (pKVM), say N.
>  
> +config PTDUMP_STAGE2_DEBUGFS
> +	bool "Present the stage-2 pagetables to debugfs"
> +	depends on KVM
> +	depends on DEBUG_KERNEL
> +	depends on DEBUG_FS
> +	depends on GENERIC_PTDUMP
> +	select PTDUMP_CORE
> +	default n
> +	help
> +	  Say Y here if you want to show the stage-2 kernel pagetables
> +	  layout in a debugfs file. This information is only useful for kernel developers
> +	  who are working in architecture specific areas of the kernel.
> +	  It is probably not a good idea to enable this feature in a production
> +	  kernel.
> +
> +	  If in doubt, say N.
> +
>  endif # VIRTUALIZATION
> -- 
> 2.46.0.295.g3b9ea8a38a-goog
>