Re: [PATCH 1/2] hw/riscv: sifive_u: Allow passing custom DTB

[Bin Meng]

Hi Anup,

On Thu, Oct 22, 2020 at 1:34 PM Anup Patel <anup.patel@wdc.com> wrote:
>
> Extend sifive_u machine to allow passing custom DTB using "-dtb"
> command-line parameter. This will help users pass modified DTB
> or Linux SiFive DTB to sifive_u machine.
>
> Signed-off-by: Anup Patel <anup.patel@wdc.com>
> ---
>  hw/riscv/sifive_u.c | 28 ++++++++++++++++++++--------
>  1 file changed, 20 insertions(+), 8 deletions(-)
>

I am using the following command to boot a Linux v5.11 kernel, but it hangs at:

$ qemu-system-riscv64 -M sifive_u -smp 5 -m 8G -display none -serial
stdio -kernel arch/riscv/boot/Image -dtb
arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dtb -append
"earlycon=sbi console=ttySIF0"

[    0.000000] smp: Bringing up secondary CPUs ...

Removing -dtb makes the kernel continue booting.

I am not sure what's missing ofusing "-dtb"?

Regards,
Bin