arm64 board boot pauses on linux-next

[John Garry]

Hi all,

I am finding our arm64 D05 board particularly slow to boot from 
linux-next, specifically a 30+ second pause when setting up CPU features.

I tried to bisect, but I am finding bisect holes (board does not boot at 
all).

Snippet good, like v4.20-rc6:
[    5.482756] smp: Brought up 4 nodes, 64 CPUs
[    7.423242] SMP: Total of 64 processors activated.
[    7.428087] CPU features: detected: GIC system register CPU interface
[    7.434620] CPU features: detected: 32-bit EL0 Support
[    7.439813] CPU features: detected: CRC32 instructions
[    7.530336] CPU: All CPU(s) started at EL2
[    7.534599] alternatives: patching kernel code
[    7.556042] devtmpfs: initialized
[    7.559982] clocksource: jiffies: mask: 0xffffffff max_cycles: 
0xffffffff, max_idle_ns: 7645041785100000 ns
[    7.569991] futex hash table entries: 16384 (order: 8, 1048576 bytes)
[    7.577262] pinctrl core: initialized pinctrl subsystem
[    7.582947] SMBIOS 3.0.0 present.
[    7.586293] DMI: Huawei Taishan 2280 /D05, BIOS Hisilicon D05 IT17 
Nemo 2.0 RC0 10/05/2018
[    7.594812] NET: Registered protocol family 16
[    7.600073] audit: initializing netlink subsys (disabled)
[    7.605593] audit: type=2000 audit(5.072:1): state=initialized 
audit_enabled=0 res=1


Snippet next-20181211:
[    5.483420] GICv3: CPU63: found redistributor 70303 region 
63:0x000004006d4c0000
[    5.483438] GICv3: CPU63: using allocated LPI pending table 
@0x0000001fb8dd0000
[    5.483578] arch_timer: CPU63: Trapping CNTVCT access
[    5.483582] CPU63: Booted secondary processor 0x0000070303 [0x410fd082]
[    5.483666] smp: Brought up 4 nodes, 64 CPUs
[    7.424162] SMP: Total of 64 processors activated.
[    7.429006] CPU features: detected: GIC system register CPU interface
[    7.435538] CPU features: detected: 32-bit EL0 Support
[    7.440731] CPU features: detected: CRC32 instructions
[   40.107984] CPU: All CPU(s) started at EL2
[   40.112264] alternatives: patching kernel code
[   40.134299] devtmpfs: initialized
[   40.138196] clocksource: jiffies: mask: 0xffffffff max_cycles: 
0xffffffff, max_idle_ns: 7645041785100000 ns
[   40.148209] futex hash table entries: 16384 (order: 8, 1048576 bytes)
[   40.155486] pinctrl core: initialized pinctrl subsystem
[   40.161109] SMBIOS 3.0.0 present.
[   40.164456] DMI: Huawei Taishan 2280 /D05, BIOS Hisilicon D05 IT17 
Nemo 2.0 RC0 10/05/2018
[   40.172985] NET: Registered protocol family 16
[   40.178236] audit: initializing netlink subsys (disabled)
[   40.183748] audit: type=2000 audit(5.072:1): state=initialized 
audit_enabled=0 res=1

Anyone else notice a similar issue?

Our nextgen D06 board does not seem to have this issue.

Thanks,
John