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20 hours ago •
open-power
open-power
On witherspoon system seeing failures when setting special wakeup on some cores
This is with latest op-build upstream and where stop11 is enabled on it.
sensors
ibmpowernv-isa-0000
Adapter: ISA adapter
Chip 0 Vdd Remote Sense: +10.40 V (lowest = +7.68 V, highest = +10.41 V)
Chip 0 Vdn Remote Sense: +9.02 V (lowest = +9.02 V, highest = +9.02 V)
Chip 8 Vdd Remote Sense: +10.14 V (lowest = +6.56 V, highest = +10.15 V)
Chip 8 Vdn Remote Sense: +9.02 V (lowest = +9.02 V, highest = +9.02 V)
Chip 0 Vdd: +10.43 V (lowest = +7.98 V, highest = +10.43 V)
Chip 0 Vdn: +9.03 V (lowest = +9.03 V, highest = +9.03 V)
Chip 8 Vdd: +10.16 V (lowest = +6.59 V, highest = +10.16 V)
Chip 8 Vdn: +9.03 V (lowest = +9.03 V, highest = +9.03 V)
Core 0: +0.0°C
Core 4: +0.0°C
Core 8: +0.0°C
Core 12: +0.0°C
Core 16: +41.0°C
Core 20: +0.0°C
Core 24: +0.0°C
Core 28: +0.0°C
Core 32: +0.0°C
Core 36: +0.0°C
[ 509.391455887,3] Could not set special wakeup on 0:16: timeout waiting for SPECIAL_WKUP_DONE.
[ 509.391546781,3] Failed to set special wakeup on 64 (-6)
[ 63.164807] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp11_input: I/O error
Core 40: +0.0°C
[ 509.443317815,3] Could not set special wakeup on 0:17: timeout waiting for SPECIAL_WKUP_DONE.
[ 509.446118428,3] Failed to set special wakeup on 68 (-6)
[ 63.271434] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp12_input: I/O error
Core 44: N/A
[ 509.497917963,3] Could not set special wakeup on 0:18: timeout waiting for SPECIAL_WKUP_DONE.
[ 509.499181905,3] Failed to set special wakeup on 72 (-6)
[ 63.382006] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp13_input: I/O error
Core 48: N/A
[ 510.042539230,3] Could not set special wakeup on 0:19: timeout waiting for SPECIAL_WKUP_DONE.
[ 510.044259811,3] Failed to set special wakeup on 76 (-6)
[ 63.488888] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp14_input: I/O error
Core 52: N/A
[ 510.097536370,3] Could not set special wakeup on 0:20: timeout waiting for SPECIAL_WKUP_DONE.
[ 510.098196905,3] Failed to set special wakeup on 80 (-6)
[ 63.596496] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp15_input: I/O error
Core 56: +0.0°C
^[[A[ 510.152311731,3] Could not set special wakeup on 0:21: timeout waiting for SPECIAL_WKUP_DONE.
[ 510.152397002,3] Failed to set special wakeup on 84 (-6)
[ 63.697695] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp16_input: I/O error
Core 60: N/A
[ 510.204162752,3] Could not set special wakeup on 0:22: timeout waiting for SPECIAL_WKUP_DONE.
[ 510.204250849,3] Failed to set special wakeup on 88 (-6)
[ 63.798991] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp17_input: I/O error
Core 64: N/A
[ 510.256048019,3] Could not set special wakeup on 0:23: timeout waiting for SPECIAL_WKUP_DONE.
[ 510.256152845,3] Failed to set special wakeup on 92 (-6)
[ 63.900347] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp18_input: I/O error
Core 68: N/A
[ 510.311098231,3] Could not set special wakeup on 8:0: timeout waiting for SPECIAL_WKUP_DONE.
[ 510.311214156,3] Failed to set special wakeup on 2048 (-6)
[ 64.007924] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp19_input: I/O error
Core 72: +0.0°C
[ 510.363058719,3] Could not set special wakeup on 8:1: timeout waiting for SPECIAL_WKUP_DONE.
[ 510.363165908,3] Failed to set special wakeup on 2052 (-6)
[ 64.109363] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp20_input: I/O error
Core 76: N/A
[ 510.415001148,3] Could not set special wakeup on 8:2: timeout waiting for SPECIAL_WKUP_DONE.
[ 510.415902035,3] Failed to set special wakeup on 2056 (-6)
[ 64.213710] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp21_input: I/O error
Core 80: N/A
[ 510.468410188,3] Could not set special wakeup on 8:3: timeout waiting for SPECIAL_WKUP_DONE.
[ 510.468503404,3] Failed to set special wakeup on 2060 (-6)
[ 64.315085] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp22_input: I/O error
Core 84: N/A
[ 511.008321447,3] Could not set special wakeup on 8:4: timeout waiting for SPECIAL_WKUP_DONE.
[ 511.009559247,3] Failed to set special wakeup on 2064 (-6)
[ 64.420073] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp23_input: I/O error
Core 88: N/A
[ 511.062038415,3] Could not set special wakeup on 8:5: timeout waiting for SPECIAL_WKUP_DONE.
[ 511.062137428,3] Failed to set special wakeup on 2068 (-6)
[ 64.521411] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp24_input: I/O error
Core 92: N/A
[ 511.113963228,3] Could not set special wakeup on 8:8: timeout waiting for SPECIAL_WKUP_DONE.
[ 511.114645263,3] Failed to set special wakeup on 2080 (-6)
[ 64.625324] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp25_input: I/O error
Core 96: N/A
[ 511.167170362,3] Could not set special wakeup on 8:9: timeout waiting for SPECIAL_WKUP_DONE.
[ 511.167263396,3] Failed to set special wakeup on 2084 (-6)
[ 64.726724] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp26_input: I/O error
Core 100: N/A
[ 511.218941943,3] Could not set special wakeup on 8:12: timeout waiting for SPECIAL_WKUP_DONE.
[ 511.219033195,3] Failed to set special wakeup on 2096 (-6)
[ 64.827851] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp27_input: I/O error
Core 104: N/A
[ 511.270864234,3] Could not set special wakeup on 8:13: timeout waiting for SPECIAL_WKUP_DONE.
[ 511.270944090,3] Failed to set special wakeup on 2100 (-6)
[ 64.931555] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp28_input: I/O error
Core 108: N/A
[ 511.323922142,3] Could not set special wakeup on 8:14: timeout waiting for SPECIAL_WKUP_DONE.
[ 511.325586573,3] Failed to set special wakeup on 2104 (-6)
[ 65.038277] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp29_input: I/O error
Core 112: N/A
[ 511.378599389,3] Could not set special wakeup on 8:15: timeout waiting for SPECIAL_WKUP_DONE.
[ 511.380030909,3] Failed to set special wakeup on 2108 (-6)
[ 65.144619] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp30_input: I/O error
Core 116: N/A
[ 511.433029256,3] Could not set special wakeup on 8:16: timeout waiting for SPECIAL_WKUP_DONE.
[ 511.435461948,3] Failed to set special wakeup on 2112 (-6)
[ 65.252906] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp31_input: I/O error
Core 120: N/A
[ 511.488460724,3] Could not set special wakeup on 8:17: timeout waiting for SPECIAL_WKUP_DONE.
[ 511.488562870,3] Failed to set special wakeup on 2116 (-6)
[ 65.354289] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp32_input: I/O error
Core 124: N/A
[ 512.028252436,3] Could not set special wakeup on 8:18: timeout waiting for SPECIAL_WKUP_DONE.
[ 512.028344705,3] Failed to set special wakeup on 2120 (-6)
[ 65.455418] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp33_input: I/O error
Core 128: N/A
[ 512.080212413,3] Could not set special wakeup on 8:19: timeout waiting for SPECIAL_WKUP_DONE.
[ 512.080317398,3] Failed to set special wakeup on 2124 (-6)
[ 65.556920] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp34_input: I/O error
Core 132: N/A
Core 136: +0.0°C
[ 512.132480766,3] Could not set special wakeup on 8:23: timeout waiting for SPECIAL_WKUP_DONE.
[ 512.132580127,3] Failed to set special wakeup on 2140 (-6)
[ 65.659009] opal: opal_error_code: unexpected OPAL error -14
ERROR: Can't get value of subfeature temp36_input: I/O error
Core 140: N/A
Chip 0 Core 0: +39.0°C (lowest = +32.0°C, highest = +54.0°C)
Chip 0 Core 4: +39.0°C (lowest = +33.0°C, highest = +46.0°C)
Chip 0 Core 8: +39.0°C (lowest = +33.0°C, highest = +48.0°C)
Chip 0 Core 12: +39.0°C (lowest = +33.0°C, highest = +48.0°C)
Chip 0 Core 16: +37.0°C (lowest = +33.0°C, highest = +48.0°C)
Chip 0 Core 20: +37.0°C (lowest = +33.0°C, highest = +46.0°C)
Chip 0 Core 24: +39.0°C (lowest = +34.0°C, highest = +49.0°C)
Chip 0 Core 28: +39.0°C (lowest = +34.0°C, highest = +50.0°C)
Chip 0 Core 32: +39.0°C (lowest = +34.0°C, highest = +48.0°C)
Chip 0 Core 36: +39.0°C (lowest = +34.0°C, highest = +49.0°C)
Chip 0 Core 40: +39.0°C (lowest = +33.0°C, highest = +45.0°C)
Chip 0 Core 44: +39.0°C (lowest = +31.0°C, highest = +44.0°C)
Chip 0 Core 48: +39.0°C (lowest = +34.0°C, highest = +47.0°C)
Chip 0 Core 52: +39.0°C (lowest = +34.0°C, highest = +47.0°C)
Chip 0 Core 56: +39.0°C (lowest = +34.0°C, highest = +49.0°C)
Chip 0 Core 60: +39.0°C (lowest = +34.0°C, highest = +51.0°C)
Chip 0 Core 64: +39.0°C (lowest = +34.0°C, highest = +48.0°C)
Chip 0 Core 68: +39.0°C (lowest = +34.0°C, highest = +50.0°C)
Chip 8 Core 72: +38.0°C (lowest = +32.0°C, highest = +48.0°C)
Chip 8 Core 76: +38.0°C (lowest = +32.0°C, highest = +49.0°C)
Chip 8 Core 80: +38.0°C (lowest = +32.0°C, highest = +49.0°C)
Chip 8 Core 84: +38.0°C (lowest = +32.0°C, highest = +48.0°C)
Chip 8 Core 88: +38.0°C (lowest = +32.0°C, highest = +53.0°C)
Chip 8 Core 92: +38.0°C (lowest = +32.0°C, highest = +50.0°C)
Chip 8 Core 96: +38.0°C (lowest = +32.0°C, highest = +48.0°C)
Chip 8 Core 100: +38.0°C (lowest = +32.0°C, highest = +48.0°C)
Chip 8 Core 104: +38.0°C (lowest = +32.0°C, highest = +48.0°C)
Chip 8 Core 108: +38.0°C (lowest = +32.0°C, highest = +49.0°C)
Chip 8 Core 112: +38.0°C (lowest = +32.0°C, highest = +49.0°C)
Chip 8 Core 116: +38.0°C (lowest = +32.0°C, highest = +48.0°C)
Chip 8 Core 120: +38.0°C (lowest = +32.0°C, highest = +48.0°C)
Chip 8 Core 124: +38.0°C (lowest = +32.0°C, highest = +49.0°C)
Chip 8 Core 128: +38.0°C (lowest = +32.0°C, highest = +49.0°C)
Chip 8 Core 132: +38.0°C (lowest = +32.0°C, highest = +48.0°C)
Chip 8 Core 136: +38.0°C (lowest = +32.0°C, highest = +53.0°C)
Chip 8 Core 140: +38.0°C (lowest = +32.0°C, highest = +52.0°C)
Chip 0 GPU 0 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 0 GPU 1 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 0 GPU 2 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 0 GPU 0 MEM: +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 0 GPU 1 MEM: +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 0 GPU 2 MEM: +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 8 GPU 0 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 8 GPU 1 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 8 GPU 2 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 8 GPU 0 MEM: +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 8 GPU 1 MEM: +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 8 GPU 2 MEM: +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 0 DIMM 0 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 0 DIMM 1 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 0 DIMM 2 : +34.0°C (lowest = +29.0°C, highest = +34.0°C)
Chip 0 DIMM 3 : +34.0°C (lowest = +30.0°C, highest = +34.0°C)
Chip 0 DIMM 4 : +35.0°C (lowest = +30.0°C, highest = +35.0°C)
Chip 0 DIMM 5 : +34.0°C (lowest = +30.0°C, highest = +34.0°C)
Chip 0 DIMM 6 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 0 DIMM 7 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 0 DIMM 8 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 0 DIMM 9 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 0 DIMM 10 : +34.0°C (lowest = +29.0°C, highest = +34.0°C)
Chip 0 DIMM 11 : +33.0°C (lowest = +29.0°C, highest = +33.0°C)
Chip 0 DIMM 12 : +33.0°C (lowest = +29.0°C, highest = +33.0°C)
Chip 0 DIMM 13 : +33.0°C (lowest = +29.0°C, highest = +33.0°C)
Chip 0 DIMM 14 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 0 DIMM 15 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 8 DIMM 0 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 8 DIMM 1 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 8 DIMM 2 : +33.0°C (lowest = +30.0°C, highest = +33.0°C)
Chip 8 DIMM 3 : +35.0°C (lowest = +31.0°C, highest = +35.0°C)
Chip 8 DIMM 4 : +35.0°C (lowest = +31.0°C, highest = +35.0°C)
Chip 8 DIMM 5 : +34.0°C (lowest = +30.0°C, highest = +34.0°C)
Chip 8 DIMM 6 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 8 DIMM 7 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 8 DIMM 8 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 8 DIMM 9 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 8 DIMM 10 : +35.0°C (lowest = +32.0°C, highest = +35.0°C)
Chip 8 DIMM 11 : +35.0°C (lowest = +32.0°C, highest = +35.0°C)
Chip 8 DIMM 12 : +33.0°C (lowest = +30.0°C, highest = +33.0°C)
Chip 8 DIMM 13 : +36.0°C (lowest = +33.0°C, highest = +36.0°C)
Chip 8 DIMM 14 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 8 DIMM 15 : +0.0°C (lowest = +0.0°C, highest = +0.0°C)
Chip 0 Nest: +39.0°C (lowest = +34.0°C, highest = +46.0°C)
Chip 8 Nest: +37.0°C (lowest = +32.0°C, highest = +44.0°C)
Chip 0 TEMPVDD: +34.0°C (lowest = +32.0°C, highest = +37.0°C)
Chip 8 TEMPVDD: +32.0°C (lowest = +30.0°C, highest = +35.0°C)
Chip 0 GPU: 4.00 W (lowest = 0.00 W, highest = 5.00 W)
Chip 8 GPU: 3.00 W (lowest = 0.00 W, highest = 4.00 W)
Chip 0 Memory: 31.00 W (lowest = 0.00 W, highest = 52.00 W)
Chip 8 Memory: 30.00 W (lowest = 0.00 W, highest = 41.00 W)
Chip 0 : 41.00 W (lowest = 0.00 W, highest = 249.00 W)
Chip 0 Vdd: 10.00 W (lowest = 8.00 W, highest = 177.00 W)
Chip 0 Vdn: 18.00 W (lowest = 17.00 W, highest = 21.00 W)
Chip 8 : 35.00 W (lowest = 0.00 W, highest = 210.00 W)
Chip 8 Vdd: 7.00 W (lowest = 3.00 W, highest = 151.00 W)
Chip 8 Vdn: 19.00 W (lowest = 18.00 W, highest = 20.00 W)
System: 211.00 W (lowest = 0.00 W, highest = 738.00 W)
APSS 0 : 211.00 W (lowest = 0.00 W, highest = 738.00 W)
APSS 1 : 0.00 W (lowest = 0.00 W, highest = 0.00 W)
APSS 2 : 3.00 W (lowest = 0.00 W, highest = 203.00 W)
APSS 3 : 1000.00 mW (lowest = 0.00 W, highest = 171.00 W)
APSS 4 : 39.00 W (lowest = 0.00 W, highest = 47.00 W)
APSS 5 : 35.00 W (lowest = 0.00 W, highest = 42.00 W)
APSS 6 : 31.00 W (lowest = 0.00 W, highest = 52.00 W)
APSS 7 : 30.00 W (lowest = 0.00 W, highest = 41.00 W)
APSS 8 : 2.00 W (lowest = 0.00 W, highest = 2.00 W)
APSS 9 : 1000.00 mW (lowest = 0.00 W, highest = 1000.00 mW)
APSS 10 : 1000.00 mW (lowest = 0.00 W, highest = 2.00 W)
APSS 11 : 1000.00 mW (lowest = 0.00 W, highest = 1000.00 mW)
APSS 12 : 1000.00 mW (lowest = 0.00 W, highest = 1000.00 mW)
APSS 13 : 1000.00 mW (lowest = 0.00 W, highest = 1000.00 mW)
APSS 14 : 27.00 W (lowest = 0.00 W, highest = 245.00 W)
APSS 15 : 34.00 W (lowest = 0.00 W, highest = 40.00 W)
Chip 0 Vdd: +1.29 A (lowest = +0.79 A, highest = +17.77 A)
Chip 0 Vdn: +2.02 A (lowest = +1.90 A, highest = +2.35 A)
Chip 8 Vdd: +0.79 A (lowest = +0.49 A, highest = +15.56 A)
Chip 8 Vdn: +2.09 A (lowest = +2.02 A, highest = +2.25 A)
@stewart-ibm This is what earlier you mentioned in one of your previous test runs. To track the status of this i raised here.
@pridhiviraj Thanks for raising the bug. Affected systems - P9 DD2.x with stop11 enabled. The problem has been root caused. OPAL/Kernel patch is under internal discussion/review.
A patch to temporarily disable stop11 while we figure it out https://github.com/open-power/op-build/pull/1874
Fix for linux kernel posted here https://patchwork.ozlabs.org/patch/875157/ Since the fix is to be delivered through linux, we can possibly close this issue.
@Over-enthusiastic With your patch i tested on a witherspoon system wihich is having latest PNOR with stop11 disabled in it. Still we are able to reproduce the issue.
/ # cat /sys//firmware/opal/msglog | grep -i stop*
[ 65.459926521,7] XSTOP: XSCOM addr = 0x5012000, FIR bit = 31
[ 70.106626618,5] SLW: Configuring self-restore for HRMOR
[ 70.106715228,5] SLW: Configuring self-restore for HRMOR
[ 70.106757656,5] SLW: Configuring self-restore for HRMOR
[ 70.106799008,5] SLW: Configuring self-restore for NCU_SPEC_BAR
[ 70.106859962,5] SLW: Configuring self-restore for P9X_EX_NCU_DARN_BAR
[ 70.106912611,5] SLW: Enabling: stop0_lite
[ 70.106945997,5] SLW: Enabling: stop0
[ 70.106964009,5] SLW: Enabling: stop1_lite
[ 70.106986801,5] SLW: Enabling: stop1
[ 70.107006769,5] SLW: Enabling: stop2_lite
[ 70.107027317,5] SLW: Enabling: stop2
[ 70.107047406,5] SLW: Enabling: stop4
[ 70.107066731,5] SLW: Enabling: stop5
watchdog: CPU 59 detected hard LOCKUP on other CPUs 0,32-33,64
[ 203.134804127,3] Could not set special wakeup on 0:0: timeout waiting for SPECIAL_WKUP_DONE.
[ 204.212137495,3] Could not set special wakeup on 0:8: timeout waiting for SPECIAL_WKUP_DONE.
[ 205.296858020,3] Could not set special wakeup on 0:8: timeout waiting for SPECIAL_WKUP_DONE.
[ 206.381755750,3] Could not set special wakeup on 0:20: timeout waiting for SPECIAL_WKUP_DONE.
PNOR is in below level which built from latest op-build.
cat /var/lib//phosphor-software-manager/pnor/ro/VERSION
open-power-witherspoon-v1.21-rc2-8-gcf83faa-dirty
buildroot-2017.11-5-g65679be
skiboot-v5.10-rc3
hostboot-28927a7
linux-4.14.20-openpower1-pf1c13fc
petitboot-v1.6.6-p7cfd0fc
machine-xml-58554bf-p1f16afe
occ-f72f857
hostboot-binaries-6924d6b
capp-ucode-p9-dd2-v3
sbe-0aae9a8
https://patchwork.ozlabs.org/patch/875157/ could fix this particular issue?
That's a kernel patch, so we'll need to work out a way to get stop11 enabled without breaking things... but perhaps we're okay at this stage if we get things into distros?
Currently, as per op-build v1.21-28-gcd1f3d0c7c0f - we have stop4 and stop5 disabled, but new hcode hw022318a.911. The stop4/stop5 disabled is because of lockups around stop4/stop5 and maybe special wakeup (i never really narrowed it down) - but https://github.com/open-power/op-build/pull/1916 contains the mad attempting-to-narrow-it-down day that was yesterday.
@stewart-ibm Commit https://github.com/open-power/op-build/commit/036e1bef0c626dce5b8a13990a9e722ecee1c4b7
Adds the HCODE fix for special wakeup issue... We should be good to enable stop4 and stop5 again.
Yeah, i have tested the upstream op-build(including that hcode fix commit) with enabling stop 4 and 5 for witherspoon platform, test runs looks stable and no special wakeup related problems occur.