Hi Luca,
> On 30 Sep 2021, at 15:54, Luca Fancellu <[email protected]> wrote:
>
> The mmc probing order has become unpredictable
> due to recent linux kernel changes, therefore devices
> like the raspberry pi that have two mmc interface most
> of the time can't boot from the hard-coded root path.
>
> Modify the u-boot script to fetch the PARTUUID of the
> second partition of the sd card and use it to put
> root=PARTUUID=<xxx> in the command line passed to
> the dom0 kernel.
>
> Signed-off-by: Luca Fancellu <[email protected]>
Reviewed-by: Bertrand Marquis <[email protected]>
Cheers
Bertrand
> ---
> .../xen-rpi-u-boot-scr/files/boot.cmd.xen.in | 11 +++++++----
> 1 file changed, 7 insertions(+), 4 deletions(-)
>
> diff --git
> a/dynamic-layers/raspberrypi/recipes-bsp/xen-rpi-u-boot-scr/files/boot.cmd.xen.in
>
> b/dynamic-layers/raspberrypi/recipes-bsp/xen-rpi-u-boot-scr/files/boot.cmd.xen.in
> index 0367e36..9874220 100644
> ---
> a/dynamic-layers/raspberrypi/recipes-bsp/xen-rpi-u-boot-scr/files/boot.cmd.xen.in
> +++
> b/dynamic-layers/raspberrypi/recipes-bsp/xen-rpi-u-boot-scr/files/boot.cmd.xen.in
> @@ -13,10 +13,6 @@ fdt resize 0x1000
> echo Add boot arguments for Xen
> fdt set /chosen xen,xen-bootargs "console=dtuart dtuart=/soc/serial@7e215040
> dom0_mem='@@RPI_DOM0_MEM@@' @@RPI_DEBUG_XEN_ARGS@@"
>
> -echo Add boot arguments for dom0
> -setenv dom0_bootargs "console=hvc0 earlycon=xenboot debug
> root=/dev/mmcblk0p2 rootwait"
> -fdt set /chosen xen,dom0-bootargs \"${dom0_bootargs}\"
> -
> echo Add a dom0 node to chosen to put Linux boot information in
> fdt mknode /chosen dom0
>
> @@ -32,6 +28,13 @@ fdt rm /scb/pcie@7d500000/pci@1,0/usb@1,0
> echo Delay to allow the MMC card to be ready
> sleep 1
>
> +# Retrieve PARTUUID for the rootfs partition of the sdcard
> +part uuid mmc 1:2 rootfs_partuuid
> +
> +echo Add boot arguments for dom0
> +setenv dom0_bootargs "console=hvc0 earlycon=xenboot debug
> root=PARTUUID=${rootfs_partuuid} rootwait"
> +fdt set /chosen xen,dom0-bootargs \"${dom0_bootargs}\"
> +
> echo Load Xen into memory
> fatload mmc 1:1 ${xen_loadaddr} xen
> echo Xen loaded, size: 0x$filesize
> --
> 2.17.1
>
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