Commit 61fb0f7e authored by Alexander Antonov's avatar Alexander Antonov Committed by Peter Zijlstra
Browse files

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



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

Signed-off-by: default avatarAlexander Antonov <alexander.antonov@linux.intel.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: default avatarKan Liang <kan.liang@linux.intel.com>
Link: https://lore.kernel.org/r/20221117122833.3103580-11-alexander.antonov@linux.intel.com
parent 9a3b675c

Documentation/ABI/testing/sysfs-devices-mapping

+29 −1
Original line number Diff line number Diff line 
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
 
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