On Tue, May 24, 2022 at 12:40:06AM +0200, Heiko Stübner wrote:

Hi Guenter,

Am Montag, 23. Mai 2022, 18:18:47 CEST schrieb Guenter Roeck:

quoted

On 5/23/22 08:18, Guo Ren wrote:

quoted

I tested Palmer's branch, it's okay:
8810d7feee5a (HEAD -> for-next, palmer/for-next) riscv: Don't output a
bogus mmu-type on a no MMU kernel

I also tested linux-next, it's okay:

rv64_rootfs:
# uname -a
Linux buildroot 5.18.0-next-20220523 #7 SMP Mon May 23 11:15:17 EDT
2022 riscv64 GNU/Linux
#

That is is ok with one setup doesn't mean it is ok with
all setups. It is not ok with my root file system (from
https://github.com/groeck/linux-build-test/tree/master/rootfs/riscv64),
with qemu v6.2.

That is very true that it shouldn't fail on any existing (qemu-)platform,
but as I remember also testing Guo's series on both riscv32 and riscv64
qemu platforms in the past, I guess it would be really helpful to get more
information about the failing platform you're experiencing so that we can
find the source of the issue.

As it looks like you both tested the same kernel source, I guess the only
differences could be in the qemu-version, kernel config and rootfs.
Is your rootfs something you can share or that can be rebuilt easily?

I provided a link to my root file system above. The link points to two
root file systems, for initrd (cpio archive) and for ext2.
I also mentioned above that I used qemu v6.2. And below I said

My root file system uses musl.

I attached the buildroot configuration below. The buildroot version,
if I remember correctly, was 2021.02.

Kernel configuration is basically defconfig. However, I do see one
detail that is possibly special in my configuration.

    # The latest kernel assumes SBI version 0.3, but that doesn't match qemu
    # at least up to version 6.2 and results in hangup/crashes during reboot
    # with sifive_u emulations.
    enable_config "${defconfig}" CONFIG_RISCV_SBI_V01

Hope that helps,

Guenter

---
BR2_riscv=y
BR2_TOOLCHAIN_BUILDROOT_MUSL=y
BR2_KERNEL_HEADERS_4_19=y
BR2_BINUTILS_VERSION_2_32_X=y
BR2_TARGET_RUN_TESTSCRIPT=y
BR2_SHUTDOWN_COMMAND_POWEROFF=y
BR2_SYSTEM_DHCP="eth0"
BR2_PACKAGE_BUSYBOX_SHOW_OTHERS=y
BR2_PACKAGE_STRACE=y
BR2_PACKAGE_I2C_TOOLS=y
BR2_PACKAGE_PCIUTILS=y
BR2_PACKAGE_DTC=y
BR2_PACKAGE_DTC_PROGRAMS=y
BR2_PACKAGE_IPROUTE2=y
BR2_TARGET_ROOTFS_BTRFS=y
BR2_TARGET_ROOTFS_CPIO=y
BR2_TARGET_ROOTFS_CPIO_GZIP=y
BR2_TARGET_ROOTFS_EXT2=y
BR2_TARGET_ROOTFS_EXT2_SIZE="16M"
BR2_TARGET_ROOTFS_EXT2_GZIP=y
BR2_TARGET_ROOTFS_ISO_GZIP=y
BR2_TARGET_ROOTFS_SQUASHFS=y
# BR2_TARGET_ROOTFS_TAR is not set