Re: PSCI checker query

[Sudeep Holla <sudeep.holla@arm.com>]

On Thu, Dec 05, 2019 at 12:38:25PM +0000, John Garry wrote:
> Hi guys,
>
> I enabled the kernel PSCI checker and it kills my Huawei D05:
>

[...]

> [   18.042122] psci_checker: PSCI checker started using 64 CPUs
> [   18.047774] psci_checker: Starting hotplug tests
> [   18.052387] psci_checker: Trying to turn off and on again all CPUs
> [   18.059082] CPU0: shutdown
> [   18.061777] psci: CPU0 killed.
> [   18.069140] CPU1: shutdown
> [   18.071844] psci: CPU1 killed.
> [   18.078530] CPU2: shutdown
> [   18.081227] psci: CPU2 killed.
> [   18.087874] CPU3: shutdown
> [   18.090605] psci: CPU3 killed.
> [   18.097415] CPU4: shutdown
> [   18.100119] psci: CPU4 killed.
> [   18.105989] usb 1-2: new high-speed USB device number 3 using
> ehci-platform
> [   18.113286] CPU5: shutdown
> [   18.116007] psci: CPU5 killed.
> [   18.122432] CPU6: shutdown
> [   18.125130] psci: CPU6 killed.
> [   18.131525] CPU7: shutdown
> [   18.134243] psci: CPU7 killed.
> [   18.140625] CPU8: shutdown
> [   18.143335] psci: CPU8 killed.
> [   18.149755] CPU9: shutdown
> [   18.152465] psci: CPU9 killed.
> [   18.158867] CPU10: shutdown
>
> [snip]
>
> [   18.521459] CPU52: shutdown
> [   18.524256] psci: CPU52 killed.
> [   18.528634] CPU53: shutdown
> [   18.531461] psci: CPU53 killed.
> [   18.535847] CPU54: shutdown
> [   18.538645] psci: CPU54 killed.
> [   18.542977] CPU55: shutdown
> [   18.545761] psci: CPU55 killed.
> [   18.550050] CPU56: shutdown
> [   18.552836] psci: CPU56 killed.
> [   18.557059] CPU57: shutdown
> [   18.559855] psci: CPU57 killed.
> [   18.564012] CPU58: shutdown
> [   18.566809] psci: CPU58 killed.
> [   18.570941] CPU59: shutdown
> [   18.573725] psci: CPU59 killed.
> [   18.577778] CPU60: shutdown
> [   18.580576] psci: CPU60 killed.
> [   18.584592] CPU61: shutdown
> [   18.587400] psci: CPU61 killed.
> [   18.591351] CPU62: shutdown
> [   18.594148] psci: CPU62 killed.
> [   18.597997] usb 1-2.1: new full-speed USB device number 4 using ehci-platform
>
> The console is unresponsive at this point.
>
> My D06 does not have this issue and the test completes successfully:
>
> D06:
>
> root@(none)$ dmesg | grep -i psci
> [    0.000000] psci: probing for conduit method from ACPI.
> [    0.000000] psci: PSCIv1.1 detected in firmware.
> [    0.000000] psci: Using standard PSCI v0.2 function IDs
> [    0.000000] psci: MIGRATE_INFO_TYPE not supported.
> [    0.000000] psci: SMC Calling Convention v1.1
> [   24.252657] psci_checker: PSCI checker started using 96 CPUs
> [   24.258305] psci_checker: Starting hotplug tests
> [   24.262914] psci_checker: Trying to turn off and on again all CPUs
> [   24.277545] psci: CPU0 killed.
> [   24.298682] psci: CPU1 killed.
> [   24.318704] psci: CPU2 killed.
> [   24.343580] psci: CPU3 killed.
>
> [snip]
>
> [   46.053433] psci_checker: cpuidle not available on CPU 92, ignoring
> [   46.059690] psci_checker: cpuidle not available on CPU 93, ignoring
> [   46.065946] psci_checker: cpuidle not available on CPU 94, ignoring
> [   46.072203] psci_checker: cpuidle not available on CPU 95, ignoring
> [   46.078465] psci_checker: Could not start suspend tests on any CPU
> [   46.084635] psci_checker: PSCI checker completed
> root@(none)$
>
> Is there anything we can check to know what's going wrong?
>

Both use the same firmware(or at-least the baseline) ? Are there any
significant hardware or firmware changes around CPU power-off sequence ?
If you are running same kernel image on both, firmware becomes easy
target to start with. Have you run some tests on PSCI firmware ?

--
Regards,
Sudeep

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