Re: [PATCH] Documentation: RISC-V: Define Xlinuxs{s,m}aia

[Conor Dooley <conor@kernel.org>]

On 3 February 2023 00:12:01 GMT, Palmer Dabbelt <palmer@rivosinc.com> wrote:
>The AIA specification was only partially frozen, but provides no way to
>refer to the subset of behavior that has been frozen.

Ahh, wonderful.

>It seems like
>there's not a whole lot of interest in the non-frozen behavior, so let's
>just define an extension that only consists of the frozen behavior

>
>Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
>---
> Documentation/riscv/extensions.rst | 10 ++++++++++
> 1 file changed, 10 insertions(+)
> create mode 100644 Documentation/riscv/extensions.rst
>
>diff --git a/Documentation/riscv/extensions.rst b/Documentation/riscv/extensions.rst
>new file mode 100644
>index 000000000000..c12bd3780520
>--- /dev/null
>+++ b/Documentation/riscv/extensions.rst
>@@ -0,0 +1,10 @@
>+.. SPDX-License-Identifier: GPL-2.0
>+
>+Custom RISC-V Extensions
>+========================
>+
>+* The `Xlinuxsmaia` and `Xlinuxssaia` extensions coorespond to the standard

Typo: correspond

>+  `Smaia` and `Ssaia` extensions as defined by version 1.0-RC2 of the RISC-V
>+  Advanced Interrupt Architecture (AIA) specification, with the difference that
>+  chapters 5 (Duo-PLIC) and 9 (IOMMU Support for MSIs to Virtual Machines) do
>+  not exist.

Perhaps this document needs an intro section specifying what you expect to go in it.
Is this for any custom stuff, or just places where Linux has to work around RVI?


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