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[Bug 1171253] Re: exynos5 : cpu_suspend for cpuidle broken

 

I did the modification in the cpuidle driver and used the u-boot before
the commit introducing the cpu booting in hypervisor mode [1] from the
u-boot for arndale [2].

I confirm the AFTR state works with this workaround.

IIUC, the cpu_suspend is not complete as it does not handle the restore
for when the cpu is in Hypervisor mode, right ?

I will keep this bug opened until I see a fix for that.


[1] https://git.linaro.org/gitweb?p=people/ronynandy/u-boot-arndale.git;a=commit;h=affeaad51746944e8c356091b12ff9c9c6183c4a

[2] https://git.linaro.org/gitweb?p=people/ronynandy/u-boot-
arndale.git;a=summary

** Changed in: linaro-power-kernel
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1171253

Title:
  exynos5 : cpu_suspend for cpuidle broken

Status in Kernel related development for Power Management Working Group:
  Confirmed

Bug description:
  When the cpu exits the AFTR state after the cpu_suspend. The kernel
  hangs.

  How to reproduce ?

  set cpu1 offline:

  echo 0 > /sys/devices/system/cpu/cpu1/online

  Wait awhile the cpu0 enters the state1 then => hang !

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References