Re: [PATCH v11 00/27] CoreSight: Refactor power management for CoreSight path - CoreSight

6 May 2026


      On Wed, May 06, 2026 at 03:33:38PM +0800, Jie Gan wrote:
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Tested on QCOM sa8775p-ride platform with sysfs mode:
Hi Jie, very appreciate for the testing!
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=== 1. Prerequisites ===
PASS: Running as root
PASS: CoreSight bus present
PASS: Sink: tmc_etr0
  Sink is TRBE: 0
PASS: Source: etm0
  Source CPU: 0
  Online CPUs: 8
  All CoreSight devices:
    ctcu0
    cti_sys0
    etm0
    etm1
    etm2
    etm3
    etm4
    etm5
    etm6
    etm7
    funnel0
    funnel1
    funnel2
    funnel3
    funnel4
    funnel5
    funnel6
    funnel7
    replicator0
    replicator1
    replicator2
    stm0
    tmc_etf0
    tmc_etr0
    tmc_etr1
    tpdm0
    tpdm1
    tpdm10
    tpdm11
    tpdm2
    tpdm3
    tpdm4
    tpdm5
    tpdm6
    tpdm7
    tpdm8
    tpdm9
=== 2. Sysfs mode: basic enable/disable ===
PASS: Sink tmc_etr0 enabled
PASS: Source etm0 enabled
PASS: Source etm0 disabled cleanly
PASS: Sink tmc_etr0 disabled cleanly
=== 3. Sysfs mode: repeated enable/disable cycles (10x) ===
PASS: 10 enable/disable cycles completed without error
=== 4. Sysfs: enable source with no active sink ===
PASS: Enable without sink returned error (expected)
=== 5. Sysfs: enable/disable all online per-CPU sources ===
    etm0 (cpu0): enabled OK
    etm1 (cpu1): enabled OK
    etm2 (cpu2): enabled OK
    etm3 (cpu3): enabled OK
    etm4 (cpu4): enabled OK
    etm5 (cpu5): enabled OK
    etm6 (cpu6): enabled OK
    etm7 (cpu7): enabled OK
PASS: All online per-CPU sources enabled/disabled successfully
=== 6. csdev->cpu sysfs attribute (Patch 3: CPU ID in coresight_device) ===
    etm0: cpu = 0 (OK)
    etm1: cpu = 1 (OK)
    etm2: cpu = 2 (OK)
    etm3: cpu = 3 (OK)
    etm4: cpu = 4 (OK)
    etm5: cpu = 5 (OK)
    etm6: cpu = 6 (OK)
    etm7: cpu = 7 (OK)
PASS: All 8 per-CPU sources have valid 'cpu' attribute
=== 7. CPU online validation before path build (Patch 27) ===
  Offlining cpu1 (source: etm1)
[  146.339051] psci: CPU1 killed (polled 0 ms)
PASS: P27: Enable on offline cpu1 rejected before path build
(enable_source=0)
[  146.689573] Detected PIPT I-cache on CPU1
[  146.689635] GICv3: CPU1: found redistributor 100 region
0:0x0000000017a80000
[  146.689801] CPU1: Booted secondary processor 0x0000000100 [0x410fd4b2]
  cpu1 back online
=== 8. CPU hotplug: core layer disables full sysfs path on CPU offline
(Patch 26) ===
  Starting sysfs trace on cpu1 (source: etm1)
  Offlining cpu1 while tracing active...
[  147.498731] psci: CPU1 killed (polled 0 ms)
PASS: P26: Source auto-disabled by core coresight_dying_cpu() on CPU offline
    Sink state after hotplug: 1
PASS: No kernel errors in dmesg during hotplug
[  148.365194] Detected PIPT I-cache on CPU1
[  148.365249] GICv3: CPU1: found redistributor 100 region
0:0x0000000017a80000
[  148.365393] CPU1: Booted secondary processor 0x0000000100 [0x410fd4b2]
PASS: cpu1 re-onlined
=== 9. CPU hotplug: re-enable sysfs tracing after CPU re-online ===
PASS: Tracing re-enabled on cpu1 after hotplug cycle
=== 10. CPU PM: path control during CPU idle (Patch 22) ===
  Sleeping 4s to allow CPU idle entry (source: etm0, cpu: 0)...
  Idle entries on cpu0 during test: 49
PASS: P22: Source still enabled after idle — path save/restore working
Thanks,
Jie