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

[Bin Meng]

On Wed, Mar 24, 2021 at 9:41 PM Bin Meng <bmeng.cn@gmail.com> wrote:
>
> 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"?

I figured out what's missing, and will send a patch on documentation soon.

Regards,
Bin