pbonzini at redhat.com
Fri May 28 01:50:12 PDT 2021
On 28/05/21 03:06, Paul Walmsley wrote:
> Earlier this year, there was a post where someone asked on the RISC-V
> International lists whether the ISA architects were ready to freeze the H
That someone was Anup. :)
> Many of the same points were made that you and Damien and Paolo have
> brought up on the Linux kernel mailing lists. Two engineers working on
> the RISC-V ISA responded, representing two different companies. They
> wrote in the thread above that it's "far from certain" that no changes
> will need to be need to be made, and that "it's a good (and necessary
> compromise)" to "[wait] a little longer to see [the AIA specification] at
> least stabilize". So it sounds like there's still a diversity of opinions
Quoting from that thread: "So, in my own opinion, we're getting close.
Not a few weeks, but not quarters either". At this point it's been a
quarter and no freezing is in sight. The author was even pushing for
stabilizing H together with pointer-masking, even though pointer masking
is basically being developed with the assumption that H goes in before
(it already includes CSRs like vsmte, vspmmask and vspmbase).
At this pace, I would be (gladly) surprised if the H extension is frozen
within the next 6 months.
More information about the linux-riscv