please help, "Ram disk image is corrupt or invalid" (qemu virt machine, arm64)
Chan Kim
ckim at etri.re.kr
Tue Oct 19 11:59:10 CEST 2021
Hi, François
Thank you for the response.
I’m now studying u-boot so it’ll take some time to learn about SystemReady boot.
BTW, inspired by your email, I tried this one. (after tftp of all three files)
=> fdt addr 0x40000000
=> fdt chosen 0x42000000 0x4211e2a1 // the length of initramfs.cpio.gz is 1172129 = 0x11e2a1)
=> fdt print /chosen
chosen {
linux,initrd-end = <0x00000000 0x4211e2a1>;
linux,initrd-start = <0x00000000 0x42000000>;
stdout-path = "/pl011 at 9000000";
};
=> booti 0x40200000 0x42000000 0x40000000
Moving Image from 0x40200000 to 0x40280000, end=41c44000
Wrong Ramdisk Image Format
Ramdisk image is corrupt or invalid
I hoped now I set the device tree to have the initrd location, the kernel could find it, but not.
Isn’t there a correct method using this approach?
Thank you! Best regards,
Chan Kim
From: François Ozog <francois.ozog at linaro.org>
Sent: Tuesday, October 19, 2021 4:32 PM
To: Chan Kim <ckim at etri.re.kr>
Cc: u-boot at lists.denx.de
Subject: Re: please help, "Ram disk image is corrupt or invalid" (qemu virt machine, arm64)
Hi
If you use the second argument to indicate the location of the initrd then Linux will use device tree information to get the size of the initrd. That information is probably absent or incorrect.
The initrd= in your command line is thus useless as you task U-boot to load it.
You may want to consider the Arm defined SystemReady boot flow to avoid issues and benefit from secure boot flow and future extensions. In the SystemReady boot flow , the Linux efi stub asks uboot to load the initrd and do not need devicectree metadata to get any location or size (this is to reinforce the use of device tree for hardware description as opposed to hacking all information sharing between boot stages).
Cheers
FF
Le mer. 13 oct. 2021 à 07:44, Chan Kim <ckim at etri.re.kr <mailto:ckim at etri.re.kr> > a écrit :
Hello all,
I can boot linux kernel using this command line.
${QEMU_DIR}/qemu-system-aarch64 -M ${QMACHINE} -cpu cortex-a72 -kernel
${LINUX_DIR}/arch/arm64/boot/Image -initrd ${BUSYBOX_DIR}/initramfs.cpio.gz
--append "root=/dev/ram init=/init nokaslr earlycon ip=dhcp" -m 2048M
-nographic -netdev user,id=n1 -device e1000,netdev=n1
After reading some docs and getting helps, I tried u-boot.
After loading Image (for arm64) and dtb.dtb, I could see the kernel booting
to the final stage of deploying initramfs but it failed because I didn't
give the initramfs.cpio.gz address. (I used "booti 0x40200000 - 0x40000000)
So I added initramfs.cpio.gz under /opt/tftp, and loaded kernel, initramfs,
and dbt on memory and gave "booti 0x40200000 0x42000000 0x40000000",
addresses are kernel, initramfs and dtb).
Below is the log. (please see the final error message below)
++ /home/ckim/QEMU/qemu/build/aarch64-softmmu/qemu-system-aarch64 -M virt
-bios u-boot.bin -cpu cortex-a57 -bios u-boot.bin -nographic -drive
if=pflash,format=raw,index=1,file=envstore.img -netdev
user,id=net0,tftp=/opt/tftp -device e1000,netdev=net0
U-Boot 2021.10-00455-g50c84208ad (Oct 13 2021 - 12:58:40 +0900)
DRAM: 128 MiB
Flash: 64 MiB
MMC:
Loading Environment from Flash... *** Warning - bad CRC, using default
environment
In: pl011 at 9000000
Out: pl011 at 9000000
Err: pl011 at 9000000
Net: e1000: 52:54:00:12:34:56
eth0: e1000#0
Hit any key to stop autoboot: 0
starting USB...
No working controllers found
USB is stopped. Please issue 'usb start' first.
scanning bus for devices...
Device 0: unknown device
Device 0: unknown device
starting USB...
No working controllers found
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
DHCP client bound to address 10.0.2.15 (1004 ms)
Using e1000#0 device
TFTP from server 10.0.2.2; our IP address is 10.0.2.15
Filename 'boot.scr.uimg'.
Load address: 0x40200000
Loading: *
TFTP error: 'File not found' (1)
Not retrying...
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
DHCP client bound to address 10.0.2.15 (1001 ms)
Using e1000#0 device
TFTP from server 10.0.2.2; our IP address is 10.0.2.15
Filename 'boot.scr.uimg'.
Load address: 0x40400000
Loading: *
TFTP error: 'File not found' (1)
Not retrying...
=> tftp 0x40000000 dtb.dtb
Using e1000#0 device
TFTP from server 10.0.2.2; our IP address is 10.0.2.15
Filename 'dtb.dtb'.
Load address: 0x40000000
Loading: #################################################################
#########
963.9 KiB/s
done
Bytes transferred = 1048576 (100000 hex)
=> tftp 0x40200000 Image
Using e1000#0 device
TFTP from server 10.0.2.2; our IP address is 10.0.2.15
Filename 'Image'.
Load address: 0x40200000
Loading: #################################################################
#################################################################
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10 MiB/s
done
Bytes transferred = 26489344 (1943200 hex)
=> tftp 0x42000000 initramfs.cpio.gz
Using e1000#0 device
TFTP from server 10.0.2.2; our IP address is 10.0.2.15
Filename 'initramfs.cpio.gz'.
Load address: 0x42000000
Loading: #################################################################
#################
1 MiB/s
done
Bytes transferred = 1169894 (11d9e6 hex)
=> booti 0x40200000 0x42000000 0x40000000
Moving Image from 0x40200000 to 0x40280000, end=41c44000
Wrong Ramdisk Image Format
Ramdisk image is corrupt or invalid
At the end, it says "Ram disk image is corrupt or invalid". What am I doing
wrong?
I tried with un-gzipped file of initramfs, the same. Should I use real
initrd format(dd image)?
Any help will be very much appreciated.
Thank you!
Chan Kim
--
<https://static.linaro.org/common/images/linaro-logo-web.png>
François-Frédéric Ozog | Director Business Development
T: +33.67221.6485
<mailto:francois.ozog at linaro.org> francois.ozog at linaro.org | Skype: ffozog
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