On 5/2/22 12:21, Arnd Bergmann wrote:
On Mon, May 2, 2022 at 6:26 PM Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
With v5.18-rc1-49-gcb813018b5c1, I still get:
[ 0.797668] RAMDISK: Couldn't find valid RAM disk image starting at 0.
[ 0.805262] /dev/root: Can't open blockdev
[ 0.805487] VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6
[ 0.805674] Please append a correct "root=" boot option; here are the available partitions:
when trying to boot z2 from initrd.
The other problems are gone.
Ok, progress!
What is your qemu command line? I see that z2 has no pcmcia device, so
I tried booting
from MMC, but this already fails with 5.18-rc1 without any of my
patches, giving me
[ 0.697481] Creating 3 MTD partitions on "physmap-flash":
[ 0.698161] 0x000000000000-0x000000040000 : "U-Boot Bootloader"
[ 0.702815] 0x000000040000-0x000000060000 : "U-Boot Environment"
[ 0.706541] 0x000000060000-0x000000800000 : "Flash"
[ 0.718066] pxa2xx-mci pxa2xx-mci.0: incomplete constraints, dummy
supplies not allowed
[ 0.718501] pxa2xx-mci pxa2xx-mci.0: incomplete constraints, dummy
supplies not allowed
To boot from initrd:
qemu-system-arm -M z2 -kernel \
arch/arm/boot/zImage -no-reboot -initrd \
rootfs-armv5.cpio --append \
"panic=-1 slub_debug=FZPUA rdinit=/sbin/init console=ttyS0" -nographic \
-monitor null -serial stdio
where rootfs-armv5.cpio is from my repository at github.com.
https://github.com/groeck/linux-build-test/blob/master/rootfs/arm/rootfs-armv5.cpio.gz
Do you have MMC or some other rootfs working without my patch series?
I can boot z2 from mmc and flash, but I have a number of configuration
flags enabled on top of pxa_defconfig. That also works with your latest patch
series. See
https://kerneltests.org/builders/qemu-arm-testing/builds/75/steps/qemubuildcommand/logs/stdio
# Always enable ...
enable_config "${defconfig}" CONFIG_DEVTMPFS CONFIG_DEVTMPFS_MOUNT CONFIG_BLK_DEV_INITRD
# Options needed to be built into the kernel for device support
# on pxa devices
# MTD, squashfs
enable_config_cond "${defconfig}" CONFIG_MTD_BLOCK CONFIG_MTD_PXA2XX CONFIG_SQUASHFS
# MMC
enable_config_cond "${defconfig}" CONFIG_MMC_BLOCK CONFIG_MMC_PXA
# PCMCIA
enable_config_cond "${defconfig}" CONFIG_ATA CONFIG_BLK_DEV_SD CONFIG_PCCARD
enable_config_cond "${defconfig}" CONFIG_PCMCIA CONFIG_PATA_PCMCIA CONFIG_PCMCIA_PXA2XX
# USB
enable_config_cond "${defconfig}" CONFIG_USB CONFIG_USB_STORAGE CONFIG_USB_OHCI_HCD CONFIG_USB_OHCI_HCD_PXA27X
Hope this helps,
Guenter
