kernel启动为啥会出现两次boot from CPU

从购买的ProdX上抓启动log，很奇怪的发现出现了两次Booting Linux on pyhsical CPU 0x0
感觉启动时走了一次循环？


Starting kernel ...

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Initializing cgroup subsys cpuacct
[    0.000000] Linux version 4.4.189 (cxh@inno) (gcc version 6.3.1 20170404 (Linaro GCC 6.3-2017.05) ) #13 SMP Fri May 8 14:39:03 CST 2020
[    0.000000] Boot CPU: AArch64 Processor [410fd034]
[    0.000000] earlycon: Early serial console at MMIO32 0xff1a0000 (options '')
[    0.000000] bootconsole [uart0] enabled
[    0.000000] Reserved memory: failed to reserve memory for node 'drm-logo@00000000': base 0x0000000000000000, size 0 MiB
[    0.000000] Reserved memory: failed to reserve memory for node 'stb-devinfo@00000000': base 0x0000000000000000, size 0 MiB
[    0.000000] cma: Reserved 256 MiB at 0x00000000e2c00000
[    0.000000] psci: probing for conduit method from DT.
[    0.000000] psci: PSCIv1.0 detected in firmware.
[    0.000000] psci: Using standard PSCI v0.2 function IDs
[    0.000000] psci: Trusted OS migration not required
[    0.000000] PERCPU: Embedded 21 pages/cpu @ffffffc0f7ecc000 s46120 r8192 d31704 u86016
[    0.000000] Detected VIPT I-cache on CPU0
[    0.000000] CPU features: enabling workaround for ARM erratum 845719
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 991752
[    0.000000] Kernel command line: earlycon=uart8250,mmio32,0xff1a0000 root=PARTUUID=614e0000-0000-4b53-8000-1d28000054a9 rw rootwait rootfstype=ext4 swiotlb=1 c
oherent_pool=1m
[    0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[    0.000000] Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes)
[    0.000000] Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes)
[    0.000000] software IO TLB: mapped [mem 0xf7e84000-0xf7ec4000] (0MB)
[    0.000000] Memory: 3657000K/4030464K available (12478K kernel code, 1810K rwdata, 4740K rodata, 1152K init, 1985K bss, 111320K reserved, 262144K cma-reserved)
[    0.000000] Virtual kernel memory layout:
[    0.000000]     modules : 0xffffff8000000000 - 0xffffff8008000000   (   128 MB)
[    0.000000]     vmalloc : 0xffffff8008000000 - 0xffffffbdbfff0000   (   246 GB)
[    0.000000]       .init : 0xffffff8009160000 - 0xffffff8009280000   (  1152 KB)
[    0.000000]       .text : 0xffffff8008080000 - 0xffffff8008cb0000   ( 12480 KB)
[    0.000000]     .rodata : 0xffffff8008cb0000 - 0xffffff8009160000   (  4800 KB)
[    0.000000]       .data : 0xffffff8009280000 - 0xffffff8009444808   (  1811 KB)
[    0.000000]     vmemmap : 0xffffffbdc0000000 - 0xffffffbfc0000000   (     8 GB maximum)
[    0.000000]               0xffffffbdc0008000 - 0xffffffbdc3e00000   (    61 MB actual)
[    0.000000]     fixed   : 0xffffffbffe7fb000 - 0xffffffbffec00000   (  4116 KB)
[    0.000000]     PCI I/O : 0xffffffbffee00000 - 0xffffffbfffe00000   (    16 MB)
[    0.000000]     memory  : 0xffffffc000200000 - 0xffffffc0f8000000   (  3966 MB)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=6, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000]  Build-time adjustment of leaf fanout to 64.
[    0.000000]  RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=6.
[    0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=64, nr_cpu_ids=6
[    0.000000] NR_IRQS:64 nr_irqs:64 0
[    0.000000] GIC: Using split EOI/Deactivate mode
[    0.000000] ITS: /interrupt-controller@fee00000/interrupt-controller@fee20000
[    0.000000] ITS: allocated 65536 Devices @a280000 (psz 64K, shr 0)
[    0.000000] ITS: using cache flushing for cmd queue
[    0.000000] GIC: using LPI property table @0x000000000a210000
[    0.000000] ITS: Allocated 1792 chunks for LPIs
[    0.000000] CPU0: found redistributor 0 region 0:0x00000000fef00000
[    0.000000] CPU0: using LPI pending table @0x000000000a220000
[    0.000000] GIC: using cache flushing for LPI property table
[    0.000000] GIC: PPI partition interrupt-partition-0[0] { /cpus/cpu@0[0] /cpus/cpu@1[1] /cpus/cpu@2[2] /cpus/cpu@3[3] }
[    0.000000] GIC: PPI partition interrupt-partition-1[1] { /cpus/cpu@100[4] /cpus/cpu@101[5] }
[    0.000000] rockchip_clk_register_frac_branch: could not find dclk_vop0_frac as parent of dclk_vop0, rate changes may not work
[    0.000000] rockchip_clk_register_frac_branch: could not find dclk_vop1_frac as parent of dclk_vop1, rate changes may not work
[    0.000000] rockchip_cpuclk_pre_rate_change: limiting alt-divider 33 to 31
[    0.000000] Architected cp15 timer(s) running at 24.00MHz (phys).
[    0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x588fe9dc0, max_idle_ns: 440795202592 ns
[    0.000006] sched_clock: 56 bits at 24MHz, resolution 41ns, wraps every 4398046511097ns
[    0.002253] Console: colour dummy device 80x25
[    0.002685] console [tty0] enabled
[    0.003021] bootconsole [uart0] disabled
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Initializing cgroup subsys cpuacct
[    0.000000] Linux version 4.4.189 (cxh@inno) (gcc version 6.3.1 20170404 (Linaro GCC 6.3-2017.05) ) #13 SMP Fri May 8 14:39:03 CST 2020