diff options
Diffstat (limited to 'Documentation/ABI/testing/sysfs-devices-mapping')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-devices-mapping | 77 |
1 files changed, 53 insertions, 24 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-mapping b/Documentation/ABI/testing/sysfs-devices-mapping index 490ccfd67f12..2eee1446ad4c 100644 --- a/Documentation/ABI/testing/sysfs-devices-mapping +++ b/Documentation/ABI/testing/sysfs-devices-mapping @@ -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" @@ -8,26 +8,55 @@ Description: block. For example, on 4-die Xeon platform with up to 6 IIO stacks per die and, therefore, 6 IIO PMON blocks per die, the mapping of - IIO PMON block 0 exposes as the following: - - $ ls /sys/devices/uncore_iio_0/die* - -r--r--r-- /sys/devices/uncore_iio_0/die0 - -r--r--r-- /sys/devices/uncore_iio_0/die1 - -r--r--r-- /sys/devices/uncore_iio_0/die2 - -r--r--r-- /sys/devices/uncore_iio_0/die3 - - $ tail /sys/devices/uncore_iio_0/die* - ==> /sys/devices/uncore_iio_0/die0 <== - 0000:00 - ==> /sys/devices/uncore_iio_0/die1 <== - 0000:40 - ==> /sys/devices/uncore_iio_0/die2 <== - 0000:80 - ==> /sys/devices/uncore_iio_0/die3 <== - 0000:c0 - - Which means: - IIO PMU 0 on die 0 belongs to PCI RP on bus 0x00, domain 0x0000 - 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 + IIO PMON block 0 exposes as the following:: + + $ ls /sys/devices/uncore_iio_0/die* + -r--r--r-- /sys/devices/uncore_iio_0/die0 + -r--r--r-- /sys/devices/uncore_iio_0/die1 + -r--r--r-- /sys/devices/uncore_iio_0/die2 + -r--r--r-- /sys/devices/uncore_iio_0/die3 + + $ tail /sys/devices/uncore_iio_0/die* + ==> /sys/devices/uncore_iio_0/die0 <== + 0000:00 + ==> /sys/devices/uncore_iio_0/die1 <== + 0000:40 + ==> /sys/devices/uncore_iio_0/die2 <== + 0000:80 + ==> /sys/devices/uncore_iio_0/die3 <== + 0000:c0 + + Which means:: + + IIO PMU 0 on die 0 belongs to PCI RP on bus 0x00, domain 0x0000 + 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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