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

This has been replaced by a "pmu-mask" property that provides much more flexibility. Signed-off-by: Rob Bradford <rbradford(a)rivosinc.com&gt; Acked-by: LIU Zhiwei <zhiwei_liu(a)linux.alibaba.com&gt; --- 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