Re: [RFC PATCH v2 15/26] of/fdt: Introduce early_init_dt_add_memory_hyp()

[Rob Herring]

On Fri, Jan 8, 2021 at 6:16 AM Quentin Perret <qperret@xxxxxxxxxx> wrote:
>
> Introduce early_init_dt_add_memory_hyp() to allow KVM to conserve a copy
> of the memory regions parsed from DT. This will be needed in the context
> of the protected nVHE feature of KVM/arm64 where the code running at EL2
> will be cleanly separated from the host kernel during boot, and will
> need its own representation of memory.

What happened to doing this with memblock?

> Signed-off-by: Quentin Perret <qperret@xxxxxxxxxx>
> ---
>  drivers/of/fdt.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
> index 4602e467ca8b..af2b5a09c5b4 100644
> --- a/drivers/of/fdt.c
> +++ b/drivers/of/fdt.c
> @@ -1099,6 +1099,10 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
>  #define MAX_MEMBLOCK_ADDR      ((phys_addr_t)~0)
>  #endif
>
> +void __init __weak early_init_dt_add_memory_hyp(u64 base, u64 size)
> +{
> +}
> +
>  void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
>  {
>         const u64 phys_offset = MIN_MEMBLOCK_ADDR;
> @@ -1139,6 +1143,7 @@ void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
>                 base = phys_offset;
>         }
>         memblock_add(base, size);
> +       early_init_dt_add_memory_hyp(base, size);
>  }
>
>  int __init __weak early_init_dt_mark_hotplug_memory_arch(u64 base, u64 size)
> --
> 2.30.0.284.gd98b1dd5eaa7-goog
>