Re: [PATCH v4 5/6] docs/about/deprecated: Document RISC-V "pmu-num" deprecation

[Alistair Francis <alistair23@gmail.com>]

On Thu, Oct 19, 2023 at 1:47 AM Rob Bradford <rbradford@rivosinc.com> wrote:
>
> This has been replaced by a "pmu-mask" property that provides much more
> flexibility.
>
> Signed-off-by: Rob Bradford <rbradford@rivosinc.com>
> Acked-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  docs/about/deprecated.rst | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>
> diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
> index 2febd2d12f..857b5d4fc4 100644
> --- a/docs/about/deprecated.rst
> +++ b/docs/about/deprecated.rst
> @@ -405,6 +405,18 @@ Specifying the iSCSI password in plain text on the command line using the
>  used instead, to refer to a ``--object secret...`` instance that provides
>  a password via a file, or encrypted.
>
> +CPU device properties
> +'''''''''''''''''''''
> +
> +``pmu-num=n`` on RISC-V CPUs (since 8.2)
> +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> +
> +In order to support more flexible counter configurations this has been replaced
> +by a ``pmu-mask`` property. If set of counters is continuous then the mask can
> +be calculated with ``((2 ^ n) - 1) << 3``. The least significant three bits
> +must be left clear.
> +
> +
>  Backwards compatibility
>  -----------------------
>
> --
> 2.41.0
>
>