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Re: [Qemu-riscv] [PATCH v2 00/23] Add RISC-V TCG backend support

From: Richard Henderson
Subject: Re: [Qemu-riscv] [PATCH v2 00/23] Add RISC-V TCG backend support
Date: Wed, 19 Dec 2018 22:07:07 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.1

On 12/19/18 11:16 AM, Alistair Francis wrote:
> This patch set adds RISC-V backend support to QEMU. This is based on
> Michael Clark's original work with extra work on top.
> This has been somewhat tested and can run other architecture softmmu
> code. It seems that any complex OS will eventually hang, but we can
> run the BIOS and OS startup code for a number of different operating
> systems.
> I haven't tested linux user support at all yet. I think Michael had that
> working reliably though and hopefully my changes haven't broken it.
> There are still some todos in the code (there are missing instructions
> and byte swapping) but these should assert instead of generating invalid
> code.

Queued to tcg-next, with the extrh fix.

Some of those todos are no longer todos, since e.g. bswap is now optional.
Those asserts should never fire (as a good assert should do, I suppose).

The missing instructions are only for riscv32, which afaik is just now making
its way to glibc.  So a chroot complete enough to build qemu is a ways away.
I'm ok with leaving that incomplete for now.


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