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Re: [PATCH 1/5] target/riscv: Ignore the S and U letters when formatting

From: Conor.Dooley
Subject: Re: [PATCH 1/5] target/riscv: Ignore the S and U letters when formatting ISA strings
Date: Mon, 8 Aug 2022 16:14:02 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0

On 08/08/2022 16:03, Tsukasa OI wrote:
> I agree with Alistair.  **I** removed 'S' and 'U' from the ISA string
> and it should be working in the latest development branch (I tested).

Yeah, I saw what you as I looked at the commit log while trying to
understand why there were invalid strings appearing when the code
looked like it was impossible. Certainly I found it very very odd.
I didn't just revive a 2 year old patch without taking a look at
the code.

> Besides, this function alone generates the ISA string for DTB and
> there's no way such ISA strings with invalid 'S' and 'U' can be
> generated.  It's definitely a behavior of QEMU 7.0 or before.

Hmm, it would seem that you're right - I have retested on a fresh
clone. I did checkout v7.1.0-rc1 before running the first build that
I saw the invalid string on as I'd been on some hacked up & fossilised
version prior to that. Perhaps some build artifacts were not correctly
removed, consider me quite confused! I do recall the configure script
saying something about my build directory when I kicked it off, so
it is likely down to that.

Unfortunately my bash history is out of order so I will not be able to
replicate the conditions, having many terminals open does have it's

> Please. Please make sure that you are testing the right version of QEMU.

Heh. Please, please give me some allowance for reasonably believing I
was in fact on the latest qemu/master after checking it out and building!

I guess this patch can then be safely ignored :)
Glad to have cleared this up as I was rather confused by what I saw.
Thanks Tsukasa/Alistair.

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