Kaige Fu c22f899a5e HV: Fix poweroff issue of hard RTVM ...

We should use INIT signal to notify the vcpu threads when
powering off the hard RTVM. To achive this, we should set
the vcpu->thread_obj.notify_mode as SCHED_NOTIFY_INIT.

Patch (27163df9 hv: sched: add sleep/wake for thread object)
tries to set the notify_mode according `is_lapic_pt_enabled(vcpu)`
in function prepare_vcpu. But at this point, the is_lapic_pt_enabled(vcpu)
will always return false. Consequently, it will set notify_mode
as SCHED_NOTIFY_IPI. Then leads to the failure of powering off
hard RTVM.

This patch fixes it by:
  - Initialize the notify_mode as SCHED_NOTIFY_IPI in prepare_vcpu.
  - Set notify_mode as SCHED_NOTIFY_INIT after guest is trying to
    enable x2apic mode of passthru lapic.

Tracked-On: #3975
Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
Reviewed-by: Yan, Like <like.yan@intel.com>
Signed-off-by: Kaige Fu <kaige.fu@intel.com>

2019-11-04 10:28:16 +08:00

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