[PATCH 1/4] fdt: add support for adding pmem nodes

[Simon Glass]

Hi Sughosh,

On Fri, 25 Oct 2024 at 13:15, Sughosh Ganu <sughosh.ganu at linaro.org> wrote:
>
> From: Masahisa Kojima <kojima.masahisa at socionext.com>
>
> One of the problems OS installers face, when running in EFI, is that
> the mounted ISO after calling ExitBootServices goes away. For some
> distros this is a problem since they rely on finding some core packages
> before continuing the installation. Distros have works around this --
> e.g Fedora has a special kernel command line parameter called
> inst.stage2 [0].
>
> ACPI has NFIT and NVDIMM support to provide ramdisks to the OS, but we
> don't have anything in place for DTs. Linux and device trees have support
> for persistent memory devices. So add a function that can inject a pmem
> node in a DT, so we can use it when launhing OS installers with EFI.
>
> [0]
> https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/7/html/installation_guide/chap-anaconda-boot-options#sect-boot-options-installer
>
> Signed-off-by: Masahisa Kojima <kojima.masahisa at socionext.com>
> Signed-off-by: Sughosh Ganu <sughosh.ganu at linaro.org>
> ---
>  boot/fdt_support.c    | 41 +++++++++++++++++++++++++++++++++++++++--
>  include/fdt_support.h | 13 +++++++++++++
>  2 files changed, 52 insertions(+), 2 deletions(-)

Can you please use the ofnode interface for this? We are trying not to
add more of this kind of fixup, as it means someone will have to port
it over later.

See EVT_FT_FIXUP

Regards,
Simon