Re: [PATCH (PING) 0/1] target/riscv: misa to ISA string conversion fix

[Alistair Francis]

On Sat, Mar 26, 2022 at 3:46 PM Tsukasa OI <research_trasio@irq.a4lg.com> wrote:
>
> [This is the same patch as previous ones]

Hello,

Thanks for the patch!

> <https://lists.nongnu.org/archive/html/qemu-riscv/2022-02/msg00098.html>
>  (qemu-riscv only)

This never made it to the QEMU mailing list

> <https://lists.nongnu.org/archive/html/qemu-riscv/2022-02/msg00097.html>
>  (resent due to configuration error of my mail server; qemu-riscv only)

and neither did this

>
> I hope this is applied before the QEMU 7.0 release.

Unfortunately you have missed the window for 7.0. This patch will need
to be reviewed then applied for the next QEMU release.

>
> Signed-off-by: Tsukasa OI <research_trasio@irq.a4lg.com>
> Reviewed-by: Frank Chang <frank.chang@sifive.com>
>
> S and U are misa bits but not extensions (instead, they are supported
> privilege modes).  Thus, they should not be copied to the ISA string.
>
> I am truly surprised that this patchset is the THIRD attempt to fix this
> longstanding problem.

I'm sorry you feel this way, but this is the first time this patch has
been sent to the list since 2019.

I'm not sure why (1) wasn't applied, but (2) and (3) don't appear to
have been sent to the QEMU mailing list.

The separate RISC-V mailing list is confusing, but patches should be
sent to qemu-devel, as described at:
https://wiki.qemu.org/Contribute/MailingLists

Alistair

>
> (1) August 2019: by Palmer Dabbelt
> <https://lists.nongnu.org/archive/html/qemu-riscv/2019-08/msg00165.html>
> <https://lists.nongnu.org/archive/html/qemu-riscv/2019-08/msg00141.html>
> <https://lists.nongnu.org/archive/html/qemu-riscv/2019-08/msg00259.html>
>
> (2) April 2021: by Emmanuel Blot
> <https://lists.nongnu.org/archive/html/qemu-riscv/2021-04/msg00248.html>
>
> (3) February 2022: by me (this patchset)
>
> I feel this is urgent to eliminate this bug now considering it required
> a workaround to RISC-V Linux kernel as I pointed out:
> <http://lists.infradead.org/pipermail/linux-riscv/2022-February/012252.html>
>
>
> Though my patchset is first developed independently, this submitted
> version is influenced by (2) Emmanuel Blot's patchset.  Thanks to this,
> constant "[n]" can now be variable "[]".
>
> It also fixes an ordering issue where 'C' should be preceded by 'L'
> (order: 'L' -> 'C') as per the RISC-V ISA Manual (version 20191213),
> Table 27.1.
>
> It clarifies the role of `riscv_exts'.  It's a single-letter extrension
> ordering list.
>
>
>
>
> Tsukasa OI (1):
>   target/riscv: misa to ISA string conversion fix
>
>  target/riscv/cpu.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
>
>
> base-commit: f345abe36527a8b575482bb5a0616f43952bf1f4
> --
> 2.32.0
>
>