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perf/x86/intel/uncore: Update sysfs-devices-mapping file

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Add description for /sys/devices/uncore_upi_*/die* attributes to
sysfs-devices-mapping.

Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Link: https://lore.kernel.org/r/20221117122833.3103580-11-alexander.antonov@linux.intel.com
This commit is contained in:
Alexander Antonov 2022-11-17 12:28:32 +00:00 committed by Peter Zijlstra
parent 9a3b675cd3
commit 61fb0f7e97
1 changed files with 29 additions and 1 deletions
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30
Documentation/ABI/testing/sysfs-devices-mapping
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@ -1,6 +1,6 @@
What: /sys/devices/uncore_iio_x/dieX
Date: February 2020
Contact: Roman Sudarikov <roman.sudarikov@linux.intel.com>
Contact: Alexander Antonov <alexander.antonov@linux.intel.com>
Description:
Each IIO stack (PCIe root port) has its own IIO PMON block, so
each dieX file (where X is die number) holds "Segment:Root Bus"
@ -32,3 +32,31 @@ Description:
IIO PMU 0 on die 1 belongs to PCI RP on bus 0x40, domain 0x0000
IIO PMU 0 on die 2 belongs to PCI RP on bus 0x80, domain 0x0000
IIO PMU 0 on die 3 belongs to PCI RP on bus 0xc0, domain 0x0000
What: /sys/devices/uncore_upi_x/dieX
Date: March 2022
Contact: Alexander Antonov <alexander.antonov@linux.intel.com>
Description:
Each /sys/devices/uncore_upi_X/dieY file holds "upi_Z,die_W"
value that means UPI link number X on die Y is connected to UPI
link Z on die W and this link between sockets can be monitored
by UPI PMON block.
For example, 4-die Sapphire Rapids platform has the following
UPI 0 topology::
# tail /sys/devices/uncore_upi_0/die*
==> /sys/devices/uncore_upi_0/die0 <==
upi_1,die_1
==> /sys/devices/uncore_upi_0/die1 <==
upi_0,die_3
==> /sys/devices/uncore_upi_0/die2 <==
upi_1,die_3
==> /sys/devices/uncore_upi_0/die3 <==
upi_0,die_1
Which means::
UPI link 0 on die 0 is connected to UPI link 1 on die 1
UPI link 0 on die 1 is connected to UPI link 0 on die 3
UPI link 0 on die 2 is connected to UPI link 1 on die 3
UPI link 0 on die 3 is connected to UPI link 0 on die 1