Ack w/comment: [TRUSTY ARM/ARM64] [PULL] UBUNTU: support reboot and poweroff for VM

[Ming Lei]

On Tue, May 19, 2015 at 2:09 AM, Brad Figg <brad.figg at canonical.com> wrote:
> On Fri, May 15, 2015 at 05:26:49PM +0800, Ming Lei wrote:
>> Hi,
>>
>> The current trusty kernel can't support 'reboot' and 'poweroff' for
>> arm64 and arm VM because of missing KVM PSCI v0.2 feature.
>>
>> So I backported the KVM PSCI v0.2 patchset from upstream(v3.16).
>>
>>        BugLink: http://bugs.launchpad.net/bugs/1455372
>>
>> The patch of 'of: reimplement the matching method for
>> __of_match_node()' is needed, because it fixes probe
>> issue for 'arm,psci-0.2'.
>>
>> The following 3 patches are backported for avoiding
>> patch conflicts, which all are PSCI related. Then all
>> other patches are for PSCI v0.2 support, and belong to
>> one same patchset when landing to upstream.
>>
>> SRU Justification:
>>     Impact: 'reboot' &'poweroff' will hang inside VM kernel
>>     Fix: backport PSCI v0.2 patches
>>     Testcase: boot one arm64 trusty VM, and run 'reboot'/'poweroff'
>>
>> So please pull the top 20 patches from below tree/branch:
>>
>>      git://kernel.ubuntu.com/git/ming/ubuntu-trusty.git  kvm-psci-backport
>>
>> 05e2de2 arm64: KVM: Enable minimalistic support for Cortex-A53
>> aa40fa6 ARM: Check if a CPU has gone offline
>> a831891 Documentation: devicetree: Add new binding for PSCIv0.2
>> fe60ff1 PSCI: Add initial support for PSCIv0.2 functions
>> 10795f4 ARM/ARM64: KVM: Advertise KVM_CAP_ARM_PSCI_0_2 to user space
>> 5f2e3f7 ARM/ARM64: KVM: Emulate PSCI v0.2 CPU_SUSPEND
>> 9271d53 ARM/ARM64: KVM: Fix CPU_ON emulation for PSCI v0.2
>> fb4e124 ARM/ARM64: KVM: Emulate PSCI v0.2 MIGRATE_INFO_TYPE and related function
>> 34c6d4d ARM/ARM64: KVM: Emulate PSCI v0.2 AFFINITY_INFO
>> 3ff7ae5 ARM/ARM64: KVM: Emulate PSCI v0.2 SYSTEM_OFF and SYSTEM_RESET
>> ab06cba KVM: Add KVM_EXIT_SYSTEM_EVENT to user space API header
>> 107daef ARM/ARM64: KVM: Make kvm_psci_call() return convention more flexible
>> b65b982 KVM: Documentation: Add info regarding KVM_ARM_VCPU_PSCI_0_2 feature
>> bdf32ab ARM/ARM64: KVM: Add base for PSCI v0.2 emulation
>> 9cc0b95 ARM/ARM64: KVM: Add common header for PSCI related defines
>> b65857e KVM: Add capability to advertise PSCI v0.2 support
>> 9fe5eca arm: KVM: Don't return PSCI_INVAL if waitqueue is inactive
>> e1e3f55 arm64: remove return value form psci_init()
>> 75d7cdb arm64: remove redundant "psci:" prefixes
>> 774b5b2 of: reimplement the matching method for __of_match_node()
>>
>>
>> Thanks,
>> Ming
>>
>> --
>> kernel-team mailing list
>> kernel-team at lists.ubuntu.com
>> https://lists.ubuntu.com/mailman/listinfo/kernel-team
>
> These are mostly all clean cherry-picks. Two had trivial conflicts:
>     b65857e KVM: Add capability to advertise PSCI v0.2 support
>     aa40fa6 ARM: Check if a CPU has gone offline

Yes, the confilicts have been fixed in this patchset.

>
> I'd like the bug to have the standard SRU template information and some
> indication in the bug of positive testing.

I have attached dmesg log information in case of both patched kernel
and non-patched kerne in the bug entry:

       http://bugs.launchpad.net/bugs/1455372

Thanks,
Ming

>
> However, these only affect ARM platforms, mostly ARM64 and mostly they
> _are_ clean cherry-picks.
>
> Brad
> --
> Brad Figg brad.figg at canonical.com http://www.canonical.com
>
> --
> kernel-team mailing list
> kernel-team at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/kernel-team