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Re: [Qemu-devel] [PULL v4 0/7] riscv-pull queue


From: Palmer Dabbelt
Subject: Re: [Qemu-devel] [PULL v4 0/7] riscv-pull queue
Date: Thu, 02 Aug 2018 18:58:26 -0700 (PDT)

On Mon, 09 Jul 2018 16:04:48 PDT (-0700), Michael Clark wrote:
On Tue, Jul 10, 2018 at 9:52 AM, Alistair Francis <address@hidden>
wrote:

On Mon, Jul 9, 2018 at 3:00 AM, Andreas Schwab <address@hidden> wrote:
> What is the state of the sifive_u emulation?  When I tried to boot a bbl
> with an included kernel I get these errors:
>
> qemu-system-riscv64: plic: invalid register write: 00002090
> qemu-system-riscv64: plic: invalid register write: 00002094
> qemu-system-riscv64: plic: invalid register write: 00002098
> qemu-system-riscv64: plic: invalid register write: 0000209c
> qemu-system-riscv64: plic: invalid register write: 000020a0
> qemu-system-riscv64: plic: invalid register write: 000020a4
> qemu-system-riscv64: plic: invalid register write: 000020a8
> qemu-system-riscv64: plic: invalid register write: 000020ac
> qemu-system-riscv64: plic: invalid register write: 000020b0
> qemu-system-riscv64: plic: invalid register write: 000020b4

I see those as well. I haven't investigated but I assume we are just
not completely modelling the PLIC. In saying that it should still
boot. Do you not see the kernel booting?

FWIW, I see similar looking messages on QEMU master but get a booting kernel. Thanks to some of the WD guys our Linux port is rapidly approaching "bootable on master", so we should start pushing on the QEMU patch queue a bit as well.

Is there anything in particular I can do to help get patches reviewed? Michael has taken most of the burden here, but I'm trying to schedule much more time for code review on my end (which I say while replying to a thread that's been dead for a month... :)).



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