Solved
Kernel cannot find the rootfs
Hello,
I have a custom board based on STM32MP151c with an eMMC on it (no SD card). The eMMC is successfully found in the U-Boot and has the following partitioning:
part list mmc 0
Partition Map for MMC device 0 -- Partition Type: EFI
Part Start LBA End LBA Name
Attributes
Type GUID
Partition GUID
1 0x00000400 0x000013ff "ssbl"
attrs: 0x0000000000000000
type: 8da63339-0007-60c0-c436-083ac8230908
guid: 81ae02b5-e823-4dfa-909e-f18021275bd7
2 0x00001400 0x000213ff "boot"
attrs: 0x0000000000000004
type: 0fc63daf-8483-4772-8e79-3d69d8477de4
type: linux
guid: 8691f7b3-c55d-4979-ad45-ab006af4d469
3 0x00021400 0x000293ff "vendorfs"
attrs: 0x0000000000000000
type: 0fc63daf-8483-4772-8e79-3d69d8477de4
type: linux
guid: c1241248-0452-4a9d-a181-dd26b1b8dc4a
4 0x00029400 0x001a93ff "rootfs"
attrs: 0x0000000000000000
type: 0fc63daf-8483-4772-8e79-3d69d8477de4
type: linux
guid: e91c4e10-16e6-4c0e-bd0e-77becf4a3582
5 0x001a9400 0x0075fbff "userfs"
attrs: 0x0000000000000000
type: 0fc63daf-8483-4772-8e79-3d69d8477de4
type: linux
guid: 91050ee0-2f8c-4a37-b0b1-54b16dfb2ec8Before booting, I set the bootargs as following:
setenv bootargs root=PARTUUID=e91c4e10-16e6-4c0e-bd0e-77becf4a3582 rw console=ttySTM0,115200However, the Kernel cannot find the rootfs partition:
[ 3.256832] VFS: Cannot open root device "PARTUUID=e91c4e10-16e6-4c0e-bd0e-77becf4a3582" or unknown-block(0,0): error -6
[ 3.266412] Please append a correct "root=" boot option; here are the available partitions:
[ 3.274832] 0100 65536 ram0
[ 3.274837] (driver?)
[ 3.280751] 0101 65536 ram1
[ 3.280754] (driver?)
[ 3.286888] 0102 65536 ram2
[ 3.286892] (driver?)
[ 3.293295] 0103 65536 ram3
[ 3.293300] (driver?)
[ 3.299064] 0104 65536 ram4
[ 3.299067] (driver?)
[ 3.305204] 0105 65536 ram5
[ 3.305207] (driver?)
[ 3.311270] 0106 65536 ram6
[ 3.311273] (driver?)
[ 3.317536] 0107 65536 ram7
[ 3.317540] (driver?)
[ 3.323516] 0108 65536 ram8
[ 3.323520] (driver?)
[ 3.329580] 0109 65536 ram9
[ 3.329583] (driver?)
[ 3.335685] 010a 65536 ram10
[ 3.335688] (driver?)
[ 3.341873] 010b 65536 ram11
[ 3.341876] (driver?)
[ 3.348065] 010c 65536 ram12
[ 3.348068] (driver?)
[ 3.354275] 010d 65536 ram13
[ 3.354278] (driver?)
[ 3.360443] 010e 65536 ram14
[ 3.360446] (driver?)
[ 3.366635] 010f 65536 ram15
[ 3.366638] (driver?)
[ 3.372830] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 3.381109] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.4.56 #1
[ 3.387030] Hardware name: STM32 (Device Tree Support)
[ 3.392210] [<c011253c>] (unwind_backtrace) from [<c010d780>] (show_stack+0x10/0x14)
[ 3.399953] [<c010d780>] (show_stack) from [<c0b14dd4>] (dump_stack+0xb0/0xc4)
[ 3.407192] [<c0b14dd4>] (dump_stack) from [<c0125e60>] (panic+0x11c/0x31c)
[ 3.414167] [<c0125e60>] (panic) from [<c1001594>] (mount_block_root+0x1cc/0x27c)
[ 3.421663] [<c1001594>] (mount_block_root) from [<c10018b0>] (mount_root+0x124/0x148)
[ 3.429597] [<c10018b0>] (mount_root) from [<c1001a54>] (prepare_namespace+0x180/0x1c4)
[ 3.437622] [<c1001a54>] (prepare_namespace) from [<c0b2c3c8>] (kernel_init+0x8/0x110)
[ 3.445557] [<c0b2c3c8>] (kernel_init) from [<c01010e8>] (ret_from_fork+0x14/0x2c)
[ 3.453136] Exception stack(0xcf089fb0 to 0xcf089ff8)
[ 3.458197] 9fa0: 00000000 00000000 00000000 00000000
[ 3.466397] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 3.474592] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 3.481232] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]---Any ideas on what might be wrong and how to correct it?
Regards,
Aleksandar