Re: [Qemu-devel] [PATCH v2 00/21] RISC-V QEMU Port Submission v2

[Palmer Dabbelt]

On Fri, 12 Jan 2018 00:09:16 PST (-0800), address@hidden wrote:
> On Fri, Jan 12, 2018 at 07:24:54AM +1300, Michael Clark wrote:
> > I'm going to be restoring branches for bbl and riscv-linux that work again
> > priv 1.9.1. There are still other emulators and RTL that support priv1.9.1.
> > Folk will have silicon against different versions of spec going forward.
> > Likewise going forward we are still going to need to support v1.10 behavior
> > when v1.11 is published. i.e. priv v1.10 mode is going to have to hide any
> > additions made in priv v1.11. I use priv v1.9.1 during my QEMU testing.
> > Hopefully, future changes are additive vs breaking...
>
> That was the plan for 1.10+.  And I thought that was because 1.10
> is what people actually started implementing for real, but based on
> the comment from Palmer that is not actually true.  Sigh..
>
> I guess at least for Linux we'd then want to make sure 1.9.1 support
> is in mainline as well, probably based off a config option.

I suppose in theory yes, but as far as I know there's no 1.9.1 chips with MMUs

> And if someone has a a good contact to the RISC-V website admins
> it would be very helpful to restore a link to the specification as well
> so that things other than the direct link work.

I sent an email.