From:   Niklas Cassel <Niklas.Cassel@wdc.com>
To:     Damien Le Moal <damien.lemoal@opensource.wdc.com>
CC:     Palmer Dabbelt <palmer@dabbelt.com>,
        "gerg@kernel.org" <gerg@kernel.org>,
        "linux-riscv@lists.infradead.org" <linux-riscv@lists.infradead.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/2] riscv: support ELF format binaries in nommu mode
Thread-Topic: [PATCH 0/2] riscv: support ELF format binaries in nommu mode
Thread-Index: AQHZS8bkMV7zY86mpUOr+8CiHQEYNK7lreKA
Date:   Wed, 1 Mar 2023 09:46:40 +0000
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On Wed, Mar 01, 2023 at 07:49:05AM +0900, Damien Le Moal wrote:

(snip)

> > Adding Damien, as IIRC he's had some hacked up userspace bits for the=20
> > K210.  I'm yet to get anything running, but it'd be great if we get thi=
s=20
> > to a point where I can actually boot test this on QEMU (I'm just doing=
=20
> > builds now).
>=20
> +Niklas
>=20
> Niklas, didn't you add a nommu qemu build for buildroot ? Can't find the =
config
> though...

Yes, I did.

In buildroot:
$ make qemu_riscv64_nommu_virt_defconfig

The QEMU command line generated by buildroot:
qemu-system-riscv64 -M virt -bios none -kernel output/images/Image -append =
"rootwait root=3D/dev/vda ro" -drive file=3Doutput/images/rootfs.ext2,forma=
t=3Draw,id=3Dhd0 -device virtio-blk-device,drive=3Dhd0 -nographic -cpu rv64=
,mmu=3Doff # qemu_riscv64_nommu_virt_defconfig

Compared to a regular riscv64 QEMU command line, the relevant parameter is:
-cpu rv64,mmu=3Doff


Kind regards,
Niklas=