Re: [PATCH v4 00/41] arm_mpam: Add KVM/arm64 and resctrl glue code
From: Zeng Heng
Date: Sat Feb 14 2026 - 04:40:46 EST
Hi Ben,
On 2026/2/4 5:43, Ben Horgan wrote:
This new version of the mpam missing pieces series has a few significant
changes in the mpam driver part of the series. The heuristics for deciding
if features should be exposed are tightened. This is to fix some
inaccuracies and avoid overcommitting before needed - shout if this changes
anything on your platform. The final patch adds documentation which
explains which features you should expect. The ABMC emulation is dropped
for the moment as it requires resctrl changes to support for MPAM without
breaking the abi. The default 5% gap for min_bw is dropped in favour of a
simple default (kept for grace). The series is based on x86/resctrl [1] as
resctrl has telemetry patches queued which change the arch interface.
Fixes that are in 6.19-rc8 are dropped from the series but
b9f5c38e4af1 ("arm_mpam: Use non-atomic bitops when modifying feature bitmap")
is required to avoid an alignment fault in the kunit tests.
Thank you for all the testing and reviewing so far! It all helps.
Changelogs in patches
From James' cover letter:
This is the missing piece to make MPAM usable resctrl in user-space. This has
shed its debugfs code and the read/write 'event configuration' for the monitors
to make the series smaller.
This adds the arch code and KVM support first. I anticipate the whole thing
going via arm64, but if goes via tip instead, the an immutable branch with those
patches should be easy to do.
Generally the resctrl glue code works by picking what MPAM features it can expose
from the MPAM drive, then configuring the structs that back the resctrl helpers.
If your platform is sufficiently Xeon shaped, you should be able to get L2/L3 CPOR
bitmaps exposed via resctrl. CSU counters work if they are on/after the L3. MBWU
counters are considerably more hairy, and depend on hueristics around the topology,
and a bunch of stuff trying to emulate ABMC.
If it didn't pick what you wanted it to, please share the debug messages produced
when enabling dynamic debug and booting with:
| dyndbg="file mpam_resctrl.c +pl"
I've not found a platform that can test all the behaviours around the monitors,
so this is where I'd expect the most bugs.
The MPAM spec that describes all the system and MMIO registers can be found here:
https://developer.arm.com/documentation/ddi0598/db/?lang=en
(Ignored the 'RETIRED' warning - that is just arm moving the documentation around.
This document has the best overview)
Based on:
[1] git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/cache
(To include telemetry code which changes the resctrl arch interface)
The series can be retrieved from:
https://gitlab.arm.com/linux-arm/linux-bh.git mpam_resctrl_glue_v4
(Final commit is a fix already in 6.19-rc8)
v3 can be found at:
https://lore.kernel.org/linux-arm-kernel/20260112165914.4086692-1-ben.horgan@xxxxxxx/
v2 can be found at:
https://lore.kernel.org/linux-arm-kernel/20251219181147.3404071-1-ben.horgan@xxxxxxx/
rfc can be found at:
https://lore.kernel.org/linux-arm-kernel/20251205215901.17772-1-james.morse@xxxxxxx/
I've tested the MPAM functionality on my local Kunpeng platform. Here's
a summary of the results:
Features enabled and verified:
* L2 and L3 CPBM
* L3 CSU
* L2 and L3 CDP
All enabled features passed functional testing as expected.
+ Tested-by: Zeng Heng <zengheng4@xxxxxxxxxx>
Features not enabled:
1. MATA MBMAX partition and MBWU monitor.
Reason: These do not meet the driver's current topology
expectations for MB support, hence they were not initialized.
This behavior is expected.
2. L2 CSU and MBWU monitors.
Reason: The current MPAM driver does not support L2-related
functionality yet.
+ Tested-by: Zeng Heng <zengheng4@xxxxxxxxxx>
Detailed test logs are as follows:
Boot logs:
[root@localhost ~]# dmesg | grep -i mpam
[ 0.000000] ACPI: MPAM 0x000000007FF35018 003024 (v01 HISI HIP12 00000000 HISI 20151124)
[ 9.509852] mpam_msc mpam_msc.64: Merging features for vmsc:0xffff0800973cf5a0 |= ris:0xffff08009757ee90
[ 9.509859] mpam_msc mpam_msc.254: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff080097628520
[ 9.509860] mpam:__props_mismatch: mpam_has_feature(mpam_feat_cpor_part, parent) = 1
[ 9.509864] mpam:__props_mismatch: mpam_has_feature(mpam_feat_cpor_part, child) = 0
[ 9.509866] mpam:__props_mismatch: parent->cpbm_wd = 8
[ 9.509869] mpam:__props_mismatch: child->cpbm_wd = 0
[ 9.509871] mpam:__props_mismatch: alias = 0
[ 9.509873] mpam:__props_mismatch: cleared cpor_part
[ 9.509876] mpam:__props_mismatch: took the min num_csu_mon
[ 9.509878] mpam:__props_mismatch: took the min num_mbwu_mon
[ 9.509881] mpam_msc mpam_msc.252: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800976284a0
[ 9.509884] mpam_msc mpam_msc.250: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff080097628420
[ 9.509887] mpam_msc mpam_msc.248: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800976283a0
[ 9.509889] mpam_msc mpam_msc.246: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff080097628320
[ 9.509892] mpam_msc mpam_msc.244: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800976282a0
[ 9.509894] mpam_msc mpam_msc.242: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff080097628220
[ 9.509897] mpam_msc mpam_msc.240: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800976281a0
[ 9.509900] mpam_msc mpam_msc.238: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff080097628120
[ 9.509902] mpam_msc mpam_msc.236: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800976280a0
[ 9.509905] mpam_msc mpam_msc.234: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff080097628020
[ 9.509907] mpam_msc mpam_msc.232: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975affa0
[ 9.509910] mpam_msc mpam_msc.230: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975aff20
[ 9.509913] mpam_msc mpam_msc.228: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975afea0
[ 9.509915] mpam_msc mpam_msc.226: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975afe20
[ 9.509918] mpam_msc mpam_msc.224: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975afda0
[ 9.509920] mpam_msc mpam_msc.222: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975afd20
[ 9.509923] mpam_msc mpam_msc.220: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975afca0
[ 9.509925] mpam_msc mpam_msc.218: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975afc20
[ 9.509928] mpam_msc mpam_msc.216: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975afba0
[ 9.509931] mpam_msc mpam_msc.214: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975afb20
[ 9.509933] mpam_msc mpam_msc.212: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975afaa0
[ 9.509936] mpam_msc mpam_msc.210: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975afa20
[ 9.509938] mpam_msc mpam_msc.208: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af9a0
[ 9.509941] mpam_msc mpam_msc.206: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af920
[ 9.509943] mpam_msc mpam_msc.204: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af8a0
[ 9.509946] mpam_msc mpam_msc.202: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af820
[ 9.509949] mpam_msc mpam_msc.200: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af7a0
[ 9.509951] mpam_msc mpam_msc.198: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af720
[ 9.509954] mpam_msc mpam_msc.196: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af6a0
[ 9.509956] mpam_msc mpam_msc.194: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af620
[ 9.509959] mpam_msc mpam_msc.192: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af5a0
[ 9.509962] mpam_msc mpam_msc.190: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af520
[ 9.509964] mpam_msc mpam_msc.188: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af4a0
[ 9.509967] mpam_msc mpam_msc.186: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af420
[ 9.509969] mpam_msc mpam_msc.184: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af3a0
[ 9.509972] mpam_msc mpam_msc.182: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af320
[ 9.509974] mpam_msc mpam_msc.180: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af2a0
[ 9.509977] mpam_msc mpam_msc.178: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af220
[ 9.509980] mpam_msc mpam_msc.176: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af1a0
[ 9.509982] mpam_msc mpam_msc.174: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af120
[ 9.509985] mpam_msc mpam_msc.172: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af0a0
[ 9.509987] mpam_msc mpam_msc.170: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975af020
[ 9.509990] mpam_msc mpam_msc.168: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975aefa0
[ 9.509993] mpam_msc mpam_msc.166: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975aef20
[ 9.509995] mpam_msc mpam_msc.164: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975aeea0
[ 9.509998] mpam_msc mpam_msc.162: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975aee20
[ 9.510000] mpam_msc mpam_msc.160: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975aeda0
[ 9.510003] mpam_msc mpam_msc.158: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975aed20
[ 9.510005] mpam_msc mpam_msc.156: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975aeca0
[ 9.510008] mpam_msc mpam_msc.154: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975aec20
[ 9.510010] mpam_msc mpam_msc.152: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975aeba0
[ 9.510013] mpam_msc mpam_msc.150: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975aeb20
[ 9.510016] mpam_msc mpam_msc.148: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975aeaa0
[ 9.510018] mpam_msc mpam_msc.146: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975aea20
[ 9.510021] mpam_msc mpam_msc.144: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae9a0
[ 9.510023] mpam_msc mpam_msc.142: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae920
[ 9.510026] mpam_msc mpam_msc.140: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae8a0
[ 9.510029] mpam_msc mpam_msc.138: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae820
[ 9.510031] mpam_msc mpam_msc.136: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae7a0
[ 9.510034] mpam_msc mpam_msc.134: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae720
[ 9.510036] mpam_msc mpam_msc.132: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae6a0
[ 9.510039] mpam_msc mpam_msc.130: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae620
[ 9.510041] mpam_msc mpam_msc.128: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae5a0
[ 9.510044] mpam_msc mpam_msc.126: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae520
[ 9.510047] mpam_msc mpam_msc.124: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae4a0
[ 9.510049] mpam_msc mpam_msc.122: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae420
[ 9.510052] mpam_msc mpam_msc.120: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae3a0
[ 9.510054] mpam_msc mpam_msc.118: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae2a0
[ 9.510057] mpam_msc mpam_msc.116: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae220
[ 9.510060] mpam_msc mpam_msc.114: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae1a0
[ 9.510062] mpam_msc mpam_msc.112: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae120
[ 9.510065] mpam_msc mpam_msc.110: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae0a0
[ 9.510067] mpam_msc mpam_msc.108: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800975ae020
[ 9.510070] mpam_msc mpam_msc.106: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff08009729c720
[ 9.510073] mpam_msc mpam_msc.104: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cffa0
[ 9.510075] mpam_msc mpam_msc.102: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cff20
[ 9.510078] mpam_msc mpam_msc.100: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cfea0
[ 9.510080] mpam_msc mpam_msc.98: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cfe20
[ 9.510083] mpam_msc mpam_msc.96: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cfda0
[ 9.510086] mpam_msc mpam_msc.94: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cfd20
[ 9.510088] mpam_msc mpam_msc.92: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cfca0
[ 9.510091] mpam_msc mpam_msc.90: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cfc20
[ 9.510094] mpam_msc mpam_msc.88: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cfba0
[ 9.510096] mpam_msc mpam_msc.86: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cfb20
[ 9.510099] mpam_msc mpam_msc.84: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cfaa0
[ 9.510102] mpam_msc mpam_msc.82: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cfa20
[ 9.510104] mpam_msc mpam_msc.80: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cf9a0
[ 9.510107] mpam_msc mpam_msc.78: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cf920
[ 9.510109] mpam_msc mpam_msc.76: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cf8a0
[ 9.510112] mpam_msc mpam_msc.74: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cf820
[ 9.510115] mpam_msc mpam_msc.72: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cf7a0
[ 9.510117] mpam_msc mpam_msc.70: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cf720
[ 9.510120] mpam_msc mpam_msc.68: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cf6a0
[ 9.510123] mpam_msc mpam_msc.66: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cf620
[ 9.510125] mpam_msc mpam_msc.64: Merging features for class:0xffff08009736fe50 &= vmsc:0xffff0800973cf5a0
[ 9.510129] mpam_msc mpam_msc.62: Merging features for vmsc:0xffff0800973cf520 |= ris:0xffff08009757ea90
[ 9.510132] mpam_msc mpam_msc.60: Merging features for vmsc:0xffff0800973cf4a0 |= ris:0xffff08009757e690
[ 9.510133] mpam_msc mpam_msc.58: Merging features for vmsc:0xffff0800973cf420 |= ris:0xffff08009757e290
[ 9.510136] mpam_msc mpam_msc.56: Merging features for vmsc:0xffff0800973cf3a0 |= ris:0xffff08009757de90
[ 9.510139] mpam_msc mpam_msc.54: Merging features for vmsc:0xffff0800973cf320 |= ris:0xffff08009757da90
[ 9.510141] mpam_msc mpam_msc.52: Merging features for vmsc:0xffff0800973cf2a0 |= ris:0xffff08009757d690
[ 9.510144] mpam_msc mpam_msc.50: Merging features for vmsc:0xffff0800973cf220 |= ris:0xffff08009757d290
[ 9.510146] mpam_msc mpam_msc.48: Merging features for vmsc:0xffff0800973cf1a0 |= ris:0xffff08009757ce90
[ 9.510149] mpam_msc mpam_msc.46: Merging features for vmsc:0xffff0800973cf120 |= ris:0xffff08009757ca90
[ 9.510152] mpam_msc mpam_msc.44: Merging features for vmsc:0xffff0800973cf0a0 |= ris:0xffff08009757c690
[ 9.510154] mpam_msc mpam_msc.42: Merging features for vmsc:0xffff0800973cf020 |= ris:0xffff08009757c290
[ 9.510157] mpam_msc mpam_msc.40: Merging features for vmsc:0xffff0800973cefa0 |= ris:0xffff08009757be90
[ 9.510160] mpam_msc mpam_msc.38: Merging features for vmsc:0xffff0800973cef20 |= ris:0xffff08009757ba90
[ 9.510162] mpam_msc mpam_msc.36: Merging features for vmsc:0xffff0800973ceea0 |= ris:0xffff08009757b690
[ 9.510166] mpam_msc mpam_msc.34: Merging features for vmsc:0xffff0800973cee20 |= ris:0xffff08009757b290
[ 9.510167] mpam_msc mpam_msc.32: Merging features for vmsc:0xffff0800973ceda0 |= ris:0xffff08009757ae90
[ 9.510170] mpam_msc mpam_msc.30: Merging features for vmsc:0xffff0800973ced20 |= ris:0xffff08009757aa90
[ 9.510173] mpam_msc mpam_msc.28: Merging features for vmsc:0xffff0800973ceca0 |= ris:0xffff08009757a690
[ 9.510175] mpam_msc mpam_msc.26: Merging features for vmsc:0xffff0800973cec20 |= ris:0xffff08009757a290
[ 9.510178] mpam_msc mpam_msc.24: Merging features for vmsc:0xffff0800973ceba0 |= ris:0xffff080097579e90
[ 9.510181] mpam_msc mpam_msc.22: Merging features for vmsc:0xffff0800973ceb20 |= ris:0xffff080097579a90
[ 9.510183] mpam_msc mpam_msc.20: Merging features for vmsc:0xffff0800973ceaa0 |= ris:0xffff080097579690
[ 9.510186] mpam_msc mpam_msc.18: Merging features for vmsc:0xffff0800973cea20 |= ris:0xffff080097579290
[ 9.510189] mpam_msc mpam_msc.16: Merging features for vmsc:0xffff0800973ce9a0 |= ris:0xffff080097578e90
[ 9.510191] mpam_msc mpam_msc.62: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cf520
[ 9.510195] mpam_msc mpam_msc.60: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cf4a0
[ 9.510196] mpam_msc mpam_msc.58: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cf420
[ 9.510199] mpam_msc mpam_msc.56: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cf3a0
[ 9.510202] mpam_msc mpam_msc.54: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cf320
[ 9.510204] mpam_msc mpam_msc.52: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cf2a0
[ 9.510207] mpam_msc mpam_msc.50: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cf220
[ 9.510209] mpam_msc mpam_msc.48: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cf1a0
[ 9.510212] mpam_msc mpam_msc.46: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cf120
[ 9.510214] mpam_msc mpam_msc.44: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cf0a0
[ 9.510217] mpam_msc mpam_msc.42: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cf020
[ 9.510219] mpam_msc mpam_msc.40: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cefa0
[ 9.510222] mpam_msc mpam_msc.38: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cef20
[ 9.510224] mpam_msc mpam_msc.36: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973ceea0
[ 9.510227] mpam_msc mpam_msc.34: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cee20
[ 9.510230] mpam_msc mpam_msc.32: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973ceda0
[ 9.510232] mpam_msc mpam_msc.30: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973ced20
[ 9.510235] mpam_msc mpam_msc.28: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973ceca0
[ 9.510237] mpam_msc mpam_msc.26: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cec20
[ 9.510240] mpam_msc mpam_msc.24: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973ceba0
[ 9.510242] mpam_msc mpam_msc.22: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973ceb20
[ 9.510245] mpam_msc mpam_msc.20: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973ceaa0
[ 9.510247] mpam_msc mpam_msc.18: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973cea20
[ 9.510250] mpam_msc mpam_msc.16: Merging features for class:0xffff08009736cc50 &= vmsc:0xffff0800973ce9a0
[ 9.510254] mpam_msc mpam_msc.14: Merging features for vmsc:0xffff0800973ce920 |= ris:0xffff080097578a90
[ 9.510255] mpam_msc mpam_msc.12: Merging features for vmsc:0xffff0800973ce8a0 |= ris:0xffff080097578690
[ 9.510258] mpam_msc mpam_msc.10: Merging features for vmsc:0xffff0800973ce820 |= ris:0xffff080097578290
[ 9.510260] mpam_msc mpam_msc.8: Merging features for vmsc:0xffff0800973ce7a0 |= ris:0xffff080097417e90
[ 9.510263] mpam_msc mpam_msc.6: Merging features for vmsc:0xffff0800973ce720 |= ris:0xffff080097417a90
[ 9.510266] mpam_msc mpam_msc.4: Merging features for vmsc:0xffff0800973ce6a0 |= ris:0xffff080097417690
[ 9.510268] mpam_msc mpam_msc.2: Merging features for vmsc:0xffff0800973ce620 |= ris:0xffff080097417290
[ 9.510271] mpam_msc mpam_msc.0: Merging features for vmsc:0xffff0800973ce5a0 |= ris:0xffff080097416e90
[ 9.510274] mpam_msc mpam_msc.14: Merging features for class:0xffff08009735bb50 &= vmsc:0xffff0800973ce920
[ 9.510276] mpam_msc mpam_msc.12: Merging features for class:0xffff08009735bb50 &= vmsc:0xffff0800973ce8a0
[ 9.510279] mpam_msc mpam_msc.10: Merging features for class:0xffff08009735bb50 &= vmsc:0xffff0800973ce820
[ 9.510281] mpam_msc mpam_msc.8: Merging features for class:0xffff08009735bb50 &= vmsc:0xffff0800973ce7a0
[ 9.510284] mpam_msc mpam_msc.6: Merging features for class:0xffff08009735bb50 &= vmsc:0xffff0800973ce720
[ 9.510287] mpam_msc mpam_msc.4: Merging features for class:0xffff08009735bb50 &= vmsc:0xffff0800973ce6a0
[ 9.510289] mpam_msc mpam_msc.2: Merging features for class:0xffff08009735bb50 &= vmsc:0xffff0800973ce620
[ 9.510292] mpam_msc mpam_msc.0: Merging features for class:0xffff08009735bb50 &= vmsc:0xffff0800973ce5a0
[ 10.978496] mpam:mpam_resctrl_pick_caches: class 2 cache misses CPOR
[ 10.978497] mpam:mpam_resctrl_pick_caches: class 255 is not a cache
[ 10.980470] mpam:mpam_resctrl_pick_mba: class 2 is before L3
[ 10.980472] mpam:mpam_resctrl_pick_mba: class 3 has no bandwidth control
[ 10.997406] mpam:topology_matches_l3: class 255 component 0 has Mismatched CPU mask with L3 equivalent
[ 10.997411] mpam:mpam_resctrl_pick_mba: class 255 topology doesn't match L3
[ 10.997415] mpam:mpam_resctrl_pick_counters: class 2 is before L3
[ 11.024109] mpam:topology_matches_l3: class 3 component 276 has Mismatched CPU mask with L3 equivalent
[ 11.024114] mpam:class_has_usable_mbwu: monitors usable in free-running mode
[ 11.063882] mpam:topology_matches_l3: class 255 component 0 has Mismatched CPU mask with L3 equivalent
[ 11.113183] mpam:mpam_resctrl_alloc_domain: Skipped monitor domain online - no monitors
[ 11.113189] MPAM enabled with 32 PARTIDs and 4 PMGs
Kunit test logs:
[ 31.253697] KTAP version 1
[ 31.253698] 1..2
[ 31.258263] KTAP version 1
[ 31.258265] # Subtest: mpam_devices_test_suite
[ 31.258267] # module: mpam
[ 31.258268] 1..3
[ 31.258775] ok 1 test_mpam_reset_msc_bitmap
[ 31.259558] ok 2 test_mpam_enable_merge_features
[ 31.260259] ok 3 test__props_mismatch
[ 31.260261] # mpam_devices_test_suite: pass:3 fail:0 skip:0 total:3
[ 31.260263] # Totals: pass:3 fail:0 skip:0 total:3
[ 31.260265] ok 1 mpam_devices_test_suite
[ 31.260267] KTAP version 1
[ 31.260268] # Subtest: mpam_resctrl_test_suite
[ 31.260269] # module: mpam
[ 31.260271] 1..7
[ 31.260965] ok 1 test_get_mba_granularity
[ 31.260968] KTAP version 1
[ 31.260969] # Subtest: test_mbw_max_to_percent
[ 31.261372] ok 1 pc=1, width=8, value=0x01
[ 31.261794] ok 2 pc=1, width=12, value=0x027
[ 31.262081] ok 3 pc=1, width=16, value=0x028e
[ 31.262183] ok 4 pc=25, width=8, value=0x3f
[ 31.262287] ok 5 pc=25, width=12, value=0x3ff
[ 31.262388] ok 6 pc=25, width=16, value=0x3fff
[ 31.262489] ok 7 pc=33, width=8, value=0x53
[ 31.262608] ok 8 pc=33, width=12, value=0x546
[ 31.262860] ok 9 pc=33, width=16, value=0x5479
[ 31.263113] ok 10 pc=35, width=8, value=0x58
[ 31.263491] ok 11 pc=35, width=12, value=0x598
[ 31.263872] ok 12 pc=35, width=16, value=0x5998
[ 31.264249] ok 13 pc=45, width=8, value=0x72
[ 31.264352] ok 14 pc=45, width=12, value=0x732
[ 31.264455] ok 15 pc=45, width=16, value=0x7332
[ 31.264559] ok 16 pc=50, width=8, value=0x7f
[ 31.264661] ok 17 pc=50, width=12, value=0x7ff
[ 31.264764] ok 18 pc=50, width=16, value=0x7fff
[ 31.264872] ok 19 pc=52, width=8, value=0x84
[ 31.264978] ok 20 pc=52, width=12, value=0x850
[ 31.265082] ok 21 pc=52, width=16, value=0x851d
[ 31.265190] ok 22 pc=55, width=8, value=0x8b
[ 31.265297] ok 23 pc=55, width=12, value=0x8cb
[ 31.265403] ok 24 pc=55, width=16, value=0x8ccb
[ 31.265507] ok 25 pc=58, width=8, value=0x93
[ 31.265609] ok 26 pc=58, width=12, value=0x946
[ 31.265714] ok 27 pc=58, width=16, value=0x9479
[ 31.265817] ok 28 pc=75, width=8, value=0xbf
[ 31.265918] ok 29 pc=75, width=12, value=0xbff
[ 31.266020] ok 30 pc=75, width=16, value=0xbfff
[ 31.266120] ok 31 pc=80, width=8, value=0xcb
[ 31.266220] ok 32 pc=80, width=12, value=0xccb
[ 31.266322] ok 33 pc=80, width=16, value=0xcccb
[ 31.266425] ok 34 pc=88, width=8, value=0xe0
[ 31.266533] ok 35 pc=88, width=12, value=0xe13
[ 31.266637] ok 36 pc=88, width=16, value=0xe146
[ 31.266758] ok 37 pc=95, width=8, value=0xf2
[ 31.267150] ok 38 pc=95, width=12, value=0xf32
[ 31.267535] ok 39 pc=95, width=16, value=0xf332
[ 31.267918] ok 40 pc=100, width=8, value=0xff
[ 31.268160] ok 41 pc=100, width=12, value=0xfff
[ 31.268264] ok 42 pc=100, width=16, value=0xffff
[ 31.268266] # test_mbw_max_to_percent: pass:42 fail:0 skip:0 total:42
[ 31.268268] ok 2 test_mbw_max_to_percent
[ 31.268270] KTAP version 1
[ 31.268271] # Subtest: test_percent_to_mbw_max
[ 31.268376] ok 1 pc=1, width=8, value=0x01
[ 31.268483] ok 2 pc=1, width=12, value=0x027
[ 31.268595] ok 3 pc=1, width=16, value=0x028e
[ 31.268701] ok 4 pc=25, width=8, value=0x3f
[ 31.268806] ok 5 pc=25, width=12, value=0x3ff
[ 31.268915] ok 6 pc=25, width=16, value=0x3fff
[ 31.269022] ok 7 pc=33, width=8, value=0x53
[ 31.269129] ok 8 pc=33, width=12, value=0x546
[ 31.269237] ok 9 pc=33, width=16, value=0x5479
[ 31.269342] ok 10 pc=35, width=8, value=0x58
[ 31.269446] ok 11 pc=35, width=12, value=0x598
[ 31.269551] ok 12 pc=35, width=16, value=0x5998
[ 31.269658] ok 13 pc=45, width=8, value=0x72
[ 31.269764] ok 14 pc=45, width=12, value=0x732
[ 31.269868] ok 15 pc=45, width=16, value=0x7332
[ 31.269975] ok 16 pc=50, width=8, value=0x7f
[ 31.270081] ok 17 pc=50, width=12, value=0x7ff
[ 31.270185] ok 18 pc=50, width=16, value=0x7fff
[ 31.270287] ok 19 pc=52, width=8, value=0x84
[ 31.270388] ok 20 pc=52, width=12, value=0x850
[ 31.270494] ok 21 pc=52, width=16, value=0x851d
[ 31.270606] ok 22 pc=55, width=8, value=0x8b
[ 31.271004] ok 23 pc=55, width=12, value=0x8cb
[ 31.271387] ok 24 pc=55, width=16, value=0x8ccb
[ 31.271770] ok 25 pc=58, width=8, value=0x93
[ 31.272151] ok 26 pc=58, width=12, value=0x946
[ 31.272260] ok 27 pc=58, width=16, value=0x9479
[ 31.272366] ok 28 pc=75, width=8, value=0xbf
[ 31.272472] ok 29 pc=75, width=12, value=0xbff
[ 31.272580] ok 30 pc=75, width=16, value=0xbfff
[ 31.272686] ok 31 pc=80, width=8, value=0xcb
[ 31.272790] ok 32 pc=80, width=12, value=0xccb
[ 31.272895] ok 33 pc=80, width=16, value=0xcccb
[ 31.273000] ok 34 pc=88, width=8, value=0xe0
[ 31.273106] ok 35 pc=88, width=12, value=0xe13
[ 31.273209] ok 36 pc=88, width=16, value=0xe146
[ 31.273318] ok 37 pc=95, width=8, value=0xf2
[ 31.273424] ok 38 pc=95, width=12, value=0xf32
[ 31.273528] ok 39 pc=95, width=16, value=0xf332
[ 31.273635] ok 40 pc=100, width=8, value=0xff
[ 31.273742] ok 41 pc=100, width=12, value=0xfff
[ 31.273847] ok 42 pc=100, width=16, value=0xffff
[ 31.273849] # test_percent_to_mbw_max: pass:42 fail:0 skip:0 total:42
[ 31.273850] ok 3 test_percent_to_mbw_max
[ 31.273852] KTAP version 1
[ 31.273853] # Subtest: test_mbw_max_to_percent_limits
[ 31.273957] ok 1 wd=1
[ 31.274064] ok 2 wd=2
[ 31.274171] ok 3 wd=3
[ 31.274276] ok 4 wd=4
[ 31.274381] ok 5 wd=5
[ 31.274485] ok 6 wd=6
[ 31.274603] ok 7 wd=7
[ 31.274710] ok 8 wd=8
[ 31.274974] ok 9 wd=9
[ 31.275362] ok 10 wd=10
[ 31.275746] ok 11 wd=11
[ 31.276122] ok 12 wd=12
[ 31.276230] ok 13 wd=13
[ 31.276335] ok 14 wd=14
[ 31.276444] ok 15 wd=15
[ 31.276551] ok 16 wd=16
[ 31.276553] # test_mbw_max_to_percent_limits: pass:16 fail:0 skip:0 total:16
[ 31.276554] ok 4 test_mbw_max_to_percent_limits
[ 31.276605] # test_percent_to_max_rounding: Round-up rate: 43% (18/42)
[ 31.276668] ok 5 test_percent_to_max_rounding
[ 31.276671] KTAP version 1
[ 31.276672] # Subtest: test_percent_max_roundtrip_stability
[ 31.276776] ok 1 wd=1
[ 31.276883] ok 2 wd=2
[ 31.276988] ok 3 wd=3
[ 31.277096] ok 4 wd=4
[ 31.277202] ok 5 wd=5
[ 31.277309] ok 6 wd=6
[ 31.277416] ok 7 wd=7
[ 31.277524] ok 8 wd=8
[ 31.277629] ok 9 wd=9
[ 31.277737] ok 10 wd=10
[ 31.277843] ok 11 wd=11
[ 31.277948] ok 12 wd=12
[ 31.278061] ok 13 wd=13
[ 31.278167] ok 14 wd=14
[ 31.278273] ok 15 wd=15
[ 31.278380] ok 16 wd=16
[ 31.278381] # test_percent_max_roundtrip_stability: pass:16 fail:0 skip:0 total:16
[ 31.278383] ok 6 test_percent_max_roundtrip_stability
[ 31.278385] KTAP version 1
[ 31.278386] # Subtest: test_rmid_idx_encoding
[ 31.278490] ok 1 max_partid=0, max_pmg=0
[ 31.278604] ok 2 max_partid=1, max_pmg=4
[ 31.279008] ok 3 max_partid=3, max_pmg=1
[ 31.279394] ok 4 max_partid=5, max_pmg=9
[ 31.279777] ok 5 max_partid=4, max_pmg=4
[ 31.280167] ok 6 max_partid=100, max_pmg=11
[ 31.358979] ok 7 max_partid=65535, max_pmg=255
[ 31.358985] # test_rmid_idx_encoding: pass:7 fail:0 skip:0 total:7
[ 31.358987] ok 7 test_rmid_idx_encoding
[ 31.358989] # mpam_resctrl_test_suite: pass:7 fail:0 skip:0 total:7
[ 31.358990] # Totals: pass:125 fail:0 skip:0 total:125
[ 31.358992] ok 2 mpam_resctrl_test_suite
------
Best regards,
Zeng Heng