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

[Brad Figg]

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

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

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