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docs: perf: Add new description for HiSilicon UC PMU

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A new function is added on HiSilicon uncore UC PMU.

The UC PMU support to filter statistical information based on
the specified tx request uring channel. Make user configuration
through "uring_channel" parameter.
Document them to provide guidance on how to use them.

Signed-off-by: Junhao He <hejunhao3@huawei.com>
Reviewed-by: Jonathan Cameron <Jonthan.Cameron@huawei.com>
Reviewed-by: Yicong Yang <yangyicong@hisilicon.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20230615125926.29832-4-hejunhao3@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Junhao He 2023-06-15 20:59:26 +08:00 committed by Will Deacon
parent 312eca95e2
commit ea8d1c062a
1 changed files with 8 additions and 0 deletions
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Documentation/admin-guide/perf/hisi-pmu.rst
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@ -98,6 +98,14 @@ CCL/ICL-ID. For I/O die, the ICL-ID is followed by:
5'b00011: HAC_ICL;
5'b10000: PCIe_ICL;
(e) uring_channel: UC PMU events 0x47~0x59 supports filtering by tx request
uring channel. It is 2 bits. Some important codes are as follows:
2'b11: count the events which sent to the uring_ext (MATA) channel;
2'b01: is the same as 2'b11;
2'b10: count the events which sent to the uring (non-MATA) channel;
2'b00: default value, count the events which sent to the both uring and
uring_ext channel;
Users could configure IDs to count data come from specific CCL/ICL, by setting
srcid_cmd & srcid_msk, and data desitined for specific CCL/ICL by setting
tgtid_cmd & tgtid_msk. A set bit in srcid_msk/tgtid_msk means the PMU will not