On Mon, Oct 22, 2018 at 01:40:05PM +0900, AKASHI Takahiro wrote:
> The current scenario for default UEFI booting, scan_dev_for_efi, has
> several issues:
> * load dtb dynamically even if its loacation (device) is not the same
>   as BOOTEFI_NAME binary's, (reported by Alex)
> * invoke 'bootmgr' only if BOOTEFI_NAME binary does exit even though
>   'bootmgr' can and should work independently whether or not the binary
>   exist,
> * in addition, invoke 'bootmgr' with dynamically-loaded dtb.
>   This behavior is not expected. (reported by Alex)
> * always assume that a 'fdtfile' variable is defined,
>   ("test -e ${devtype} ${devnum}:${distro_bootpart} "${prefix}${efi_fdtfile}"
>   always returns true even if fdtfile is NULL with prefix=="/".)
> * redundantly check for 'fdt_addr_r' in boot_efi_binary
> 
> In this patch, all the issues above are sorted out.
> Please note that the default behavior can be customized with:
>       fdtfile: a dtb file name
>       efi_dtb_prefixes: a list of paths for searching for a dtb file
> 
> (this feature does work even without this patch.)
> 
> Signed-off-by: AKASHI Takahiro <takahiro.aka...@linaro.org>
> ---
>  include/config_distro_bootcmd.h | 38 +++++++++++++++++----------------
>  1 file changed, 20 insertions(+), 18 deletions(-)
> 
> diff --git a/include/config_distro_bootcmd.h b/include/config_distro_bootcmd.h
> index 373fee78a999..256698309eb9 100644
> --- a/include/config_distro_bootcmd.h
> +++ b/include/config_distro_bootcmd.h
> @@ -115,7 +115,7 @@
>   */
>  #define BOOTENV_EFI_SET_FDTFILE_FALLBACK                                  \
>       "if test -z \"${fdtfile}\" -a -n \"${soc}\"; then "               \
> -       "setenv efi_fdtfile ${soc}-${board}${boardver}.dtb; "           \
> +       "efi_fdtfile=${soc}-${board}${boardver}.dtb; "           \
>       "fi; "
>  #else
>  #define BOOTENV_EFI_SET_FDTFILE_FALLBACK
> @@ -124,26 +124,20 @@
>  
>  #define BOOTENV_SHARED_EFI                                                \
>       "boot_efi_binary="                                                \
> -             "if fdt addr ${fdt_addr_r}; then "                        \
> -                     "bootefi bootmgr ${fdt_addr_r};"                  \
> -             "else "                                                   \
> -                     "bootefi bootmgr ${fdtcontroladdr};"              \
> -             "fi;"                                                     \
>               "load ${devtype} ${devnum}:${distro_bootpart} "           \
>                       "${kernel_addr_r} efi/boot/"BOOTEFI_NAME"; "      \
> -             "if fdt addr ${fdt_addr_r}; then "                        \
> -                     "bootefi ${kernel_addr_r} ${fdt_addr_r};"         \
> -             "else "                                                   \
> -                     "bootefi ${kernel_addr_r} ${fdtcontroladdr};"     \
> -             "fi\0"                                                    \
> +             "bootefi ${kernel_addr_r} ${efi_fdt_addr};\0"             \
>       \
>       "load_efi_dtb="                                                   \
> -             "load ${devtype} ${devnum}:${distro_bootpart} "           \
> -                     "${fdt_addr_r} ${prefix}${efi_fdtfile}\0"         \
> +             "load ${devtype} ${devnum}:${distro_bootpart} "           \
> +                     "${fdt_addr_r} ${prefix}${efi_fdtfile}; "         \
> +             "if fdt addr ${fdt_addr_r}; then "                        \
> +                     "efi_fdt_addr=${fdt_addr_r}; "                    \
> +             "fi;\0"                                                   \
>       \
>       "efi_dtb_prefixes=/ /dtb/ /dtb/current/\0"                        \
> -     "scan_dev_for_efi="                                               \
> -             "setenv efi_fdtfile ${fdtfile}; "                         \
> +     "set_efi_fdt_addr="                                               \
> +             "efi_fdtfile=${fdtfile}; "                         \
>               BOOTENV_EFI_SET_FDTFILE_FALLBACK                          \
>               "for prefix in ${efi_dtb_prefixes}; do "                  \
>                       "if test -e ${devtype} "                          \
> @@ -151,19 +145,26 @@
>                                       "${prefix}${efi_fdtfile}; then "  \
>                               "run load_efi_dtb; "                      \
>                       "fi;"                                             \
> -             "done;"                                                   \
> +             "done;\0"                                                   \
> +     \
> +     "scan_dev_for_efi="                                               \
>               "if test -e ${devtype} ${devnum}:${distro_bootpart} "     \
>                                       "efi/boot/"BOOTEFI_NAME"; then "  \
>                               "echo Found EFI removable media binary "  \
>                                       "efi/boot/"BOOTEFI_NAME"; "       \
> +                             "efi_fdt_addr=${fdtcontroladdr}; "        \
> +                             "if test -n \"${fdtfile}\"; then "        \
> +                                     "run set_efi_fdt_addr; "          \
> +                             "fi; "                                    \
>                               "run boot_efi_binary; "                   \
>                               "echo EFI LOAD FAILED: continuing...; "   \
> -             "fi; "                                                    \
> -             "setenv efi_fdtfile\0"
> +             "fi;\0"
>  #define SCAN_DEV_FOR_EFI "run scan_dev_for_efi;"
> +#define BOOT_EFI_BOOT_MANAGER "bootefi bootmgr;"
>  #else
>  #define BOOTENV_SHARED_EFI
>  #define SCAN_DEV_FOR_EFI
> +#define BOOT_EFI_BOOT_MANAGER
>  #endif
>  
>  #ifdef CONFIG_SATA
> @@ -409,6 +410,7 @@
>       BOOT_TARGET_DEVICES(BOOTENV_DEV)                                  \
>       \
>       "distro_bootcmd=" BOOTENV_SET_SCSI_NEED_INIT                      \
> +             BOOT_EFI_BOOT_MANAGER                                     \

The last-minute change may have introduced a problem.
By moving "bootmgr" from scan_dev_for_efi" to here,
grub fails to start a grub.cfg menu, saying
  "error: no such device: /.disk/info."

Do you have any ideas?

-Takahiro Akashi


>               "for target in ${boot_targets}; do "                      \
>                       "run bootcmd_${target}; "                         \
>               "done\0"
> -- 
> 2.19.0
> 
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