Based on thread https://lists.denx.de/pipermail/u-boot/2021-June/451828.html especially "Overall we have a deficiency in the UEFI implementation in that we cannot deal with block devices added or removed after initialization." there is a need to deal with removable media as usb/scsi/sata.
That's why bridge this gap in EFI implementation by resetting usb and scsi resets to get all disks before efi_init_obj_list() is called.
In our standard boot flow, where we use distro boot, order is fixed as "jtag mmc0 mmc1 qspi0 nand0 usb0 usb1 scsi0 pxe dhcp" with prioritizing boot device added by commit 2882b39d564b ("arm64: zynqmp: Setup the first boot_target at run time"). When device has ESP partition all devices should be detected because then efi_disk_register() in efi_init_obj_list() is called only once.
The first such a device is sd/emmc(mmc0/mmc1) and then disks on usb/sata are not handled at all.
The commit 6bb577dbb30f ("arm64: zynqmp: Disable EFI_CAPSULE_ON_DISK_EARLY") also pointed out on this issue but detection of removable media wasn't solved that's why do it now via preboot command.
I have tested cases without usb and scsi and there is no problem with calling resets without devices itself.
Signed-off-by: Michal Simek michal.simek@xilinx.com ---
configs/xilinx_zynqmp_virt_defconfig | 1 + 1 file changed, 1 insertion(+)
diff --git a/configs/xilinx_zynqmp_virt_defconfig b/configs/xilinx_zynqmp_virt_defconfig index 43ab4e7bd990..748e6d668654 100644 --- a/configs/xilinx_zynqmp_virt_defconfig +++ b/configs/xilinx_zynqmp_virt_defconfig @@ -22,6 +22,7 @@ CONFIG_FIT_VERBOSE=y CONFIG_SPL_LOAD_FIT=y CONFIG_SPL_LOAD_FIT_ADDRESS=0x10000000 CONFIG_USE_PREBOOT=y +CONFIG_PREBOOT="scsi reset;usb reset" # CONFIG_DISPLAY_CPUINFO is not set CONFIG_BOARD_EARLY_INIT_F=y CONFIG_BOARD_EARLY_INIT_R=y