Hi Jason,

Apologies for the delay in testing.

I'm seeing this problem when I try to boot on a t4240rdb:

random: get_random_u64 called from .start_kernel+0x734/0x964 with crng_init=0                               [8/973]
clocksource: timebase: mask: 0xffffffffffffffff max_cycles: 0xa9210e89c, max_idle_ns: 440795203878 ns
clocksource: timebase mult[15d17460] shift[24] registered
Console: colour dummy device 80x25
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 16384 (order: 5, 131072 bytes, linear)
Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes, linear)
e6500 family performance monitor hardware support registered
rcu: Hierarchical SRCU implementation.
smp: Bringing up secondary CPUs ...
Processor 2 is stuck.
Processor 3 is stuck.
Processor 4 is stuck.
Processor 5 is stuck.
Processor 6 is stuck.
Processor 7 is stuck.
Processor 8 is stuck.
Processor 9 is stuck.
Processor 10 is stuck.
Processor 11 is stuck.
Processor 12 is stuck.
Processor 13 is stuck.
Processor 14 is stuck.
...
Processor 22 is stuck.                                                                                             
Processor 23 is stuck.                                                            
smp: Brought up 1 node, 2 CPUs                                                                              
Using standard scheduler topology                                                                                  
devtmpfs: initialized                                                                                              
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns                    
futex hash table entries: 8192 (order: 7, 524288 bytes, linear)                                             
NET: Registered protocol family 16                                                                        
audit: initializing netlink subsys (disabled)                                                       
audit: type=2000 audit(108.032:1): state=initialized audit_enabled=0 res=1                                         
Machine: fsl,T4240RDB                                                        
SoC family: QorIQ T4240                                                                   
SoC ID: svr:0x82480020, Revision: 2.0
... boot continues ...


If I boot with nokaslr, all the CPUs come up with no issue.

This is on top of powerpc/merge at
8299da600ad05b8aa0f15ec0f5f03bd40e37d6f0. If you'd like me to test any
debug patches I can do that.

I've attached my .config.

Regards,
Daniel