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

[Atish Kumar Patra]

On Sun, Oct 22, 2023 at 7:04 PM Alistair Francis <alistair23@gmail.com> wrote:
>
> 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 This has been replaced by a "pmu-mask" property that provides much more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
> >
> >


Reviewed-by: Atish Patra <atishp@rivosinc.com>