bananapi ~ # dmesg | grep -E 'psci|CPU|SMP|maxcpu'
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.0.0-rc6 (root@bananapi) (gcc version 4.8.3 (Gentoo 4.8.3 p1.1, pie-0.5.9) ) #8 SMP Sun Apr 5 21:28:58 CEST 2015
[    0.000000] CPU: ARMv7 Processor [410fc074] revision 4 (ARMv7), cr=50c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[    0.000000] psci: probing for conduit method from DT.
[    0.000000] psci: Using PSCI v0.1 Function IDs from DT
[    0.000000] PERCPU: Embedded 10 pages/cpu @eefcb000 s11136 r8192 d21632 u40960
[    0.000000] Kernel command line: console=ttyS0,115200 disp.screen0_output_mode=EDID:1024x768p50 hdmi.audio=EDID:0 earlyprintk keep_bootcon elevator=deadline root=/dev/mmcblk0p2 rootwait panic=10 maxcpus=1
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[    0.000000]  Additional per-CPU info printed with stalls.
[    0.057040] CPU: Testing write buffer coherency: ok
[    0.073099] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.086276] Brought up 1 CPUs
[    0.089334] SMP: Total of 1 processors activated (48.00 BogoMIPS).
[    0.095619] CPU: All CPU(s) started in HYP mode.
[    0.100313] CPU: Virtualization extensions available.
[    1.112076] ledtrig-cpu: registered to indicate activity on CPUs
bananapi ~ # lscpu
Architecture:          armv7l
Byte Order:            Little Endian
CPU(s):                2
On-line CPU(s) list:   0
Off-line CPU(s) list:  1
Thread(s) per core:    1
Core(s) per socket:    1
Socket(s):             1
Model name:            ARMv7 Processor rev 4 (v7l)
CPU max MHz:           960.0000
CPU min MHz:           144.0000