L1 warning without running L2

------------[ cut here ]------------
WARNING: CPU: 0 PID: 6 at /home/jintack/linux-nested/arch/arm64/kvm/../../../virt/kvm/arm/arch_timer.c:95 kvm_timer_inject_irq_work+0x2c/0x68
Modules linked in:

CPU: 0 PID: 6 Comm: kworker/u16:0 Not tainted 4.6.0-rc1+ #5
Hardware name: HP ProLiant m400 Server Cartridge (DT)
Workqueue: kvm_arch_timer kvm_timer_inject_irq_work
task: ffffffcfb8073c00 ti: ffffffcfb80ac000 task.ti: ffffffcfb80ac000
PC is at kvm_timer_inject_irq_work+0x2c/0x68
LR is at kvm_timer_inject_irq_work+0x4c/0x68
pc : [<ffffff80080b03d4>] lr : [<ffffff80080b03f4>] pstate: 20000145
sp : ffffffcfb80afd60
x29: ffffffcfb80afd60 x28: ffffff80089b9000
x27: ffffffcfb8019000 x26: ffffffcfb8019020
x25: 0000000000000001 x24: 0000000000000000
x23: 0000000000000000 x22: ffffffcfb76d4800
x21: ffffffcfb8019000 x20: ffffffcfb07116a0
x19: ffffffcfb0710000 x18: ffffff80086fd290
x17: 000000000000000e x16: 0000000000000007
x15: 0000000000000000 x14: 0000000000000000
x13: 000000000000000e x12: 0000000000000000
x11: ffffff80086aaea0 x10: 0000000000000840
x9 : ffffffcfb80ac000 x8 : ffffffcfb80744a0
x7 : ffffffcffff1a1a0 x6 : 0000000000000000
x5 : 0000000000000000 x4 : ffffffcfb8019000
x3 : ffffffcfb8073c00 x2 : ffffffcfb76d4805
x1 : 000000027216c499 x0 : 0000000000000000

---[ end trace 31899263622bfd3a ]---
Call trace:
Exception stack(0xffffffcfb80afba0 to 0xffffffcfb80afcc0)
fba0: ffffffcfb0710000 ffffffcfb07116a0 ffffffcfb80afd60 ffffff80080b03d4
fbc0: ffffffcfb80afc10 ffffff80080ee984 ffffffcfb57d7648 0000000000000140
fbe0: ffffffcfb57d18a0 ffffff8009e89000 0000000000000000 0000000000000002
fc00: ffffffcfb80afc10 ffffff80080ee990 ffffffcfb80afc50 ffffff80083ba6b0
fc20: 0000000000000000 0000000000000002 0000000000000000 0000000000000001
fc40: 0000000000000000 000000027216c499 ffffffcfb76d4805 ffffffcfb8073c00
fc60: ffffffcfb8019000 0000000000000000 0000000000000000 ffffffcffff1a1a0
fc80: ffffffcfb80744a0 ffffffcfb80ac000 0000000000000840 ffffff80086aaea0
fca0: 0000000000000000 000000000000000e 0000000000000000 0000000000000000
[<ffffff80080b03d4>] kvm_timer_inject_irq_work+0x2c/0x68
[<ffffff80080d0214>] process_one_work+0x134/0x2e8
[<ffffff80080d0420>] worker_thread+0x58/0x438
[<ffffff80080d5c9c>] kthread+0xd4/0xe8
[<ffffff8008085e10>] ret_from_fork+0x10/0x40