WARNING: CPU: 0 PID: 1 at /build/linux-raspi2-DI3Sqp/linux-raspi2-4.15.0/arch/arm64/kernel/cpufeature.c:823 has_cpuid_feature+0x90/0x340

[Juerg Haefliger]

After upgrading Bionic on a Raspberry Pi 3B+ from
4.15.0-1041-raspi2 to 4.15.0-1052-raspi2 and rebooting:

[ 0.088772] CPU features: detected: 32-bit EL0 Support
[ 0.106266] ------------[ cut here ]------------
[ 0.106325] WARNING: CPU: 0 PID: 1 at /build/linux-raspi2-DI3Sqp/linux-raspi2-4.15.0/arch/arm64/kernel/cpufeature.c:823 has_cpuid_feature+0x90/0x340
[ 0.106366] Modules linked in:
[ 0.106397] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.15.0-1052-raspi2 #56-Ubuntu
[ 0.106426] Hardware name: Raspberry Pi 3 Model B Plus Rev 1.3 (DT)
[ 0.106455] pstate: 40400005 (nZcv daif +PAN -UAO)
[ 0.106480] pc : has_cpuid_feature+0x90/0x340
[ 0.106504] lr : has_cpuid_feature+0x90/0x340
[ 0.106524] sp : ffff000008023d60
[ 0.106542] x29: ffff000008023d60 x28: 0000000000000000
[ 0.106572] x27: 0000000000000000 x26: ffff28740962ff98
[ 0.106603] x25: 0000000000000040 x24: ffff287409609c40
[ 0.106633] x23: ffff287409609000 x22: ffff28740962f000
[ 0.106664] x21: ffff287408e29740 x20: 0000000000000001
[ 0.106693] x19: ffff287408c03e78 x18: ffffffffffffffff
[ 0.106723] x17: 0000000001b5644e x16: 00680000011fff13
[ 0.106753] x15: ffff287409609c08 x14: 0720072007200720
[ 0.106783] x13: 0720072007200720 x12: 0720072007200720
[ 0.106814] x11: 0720072007200720 x10: 0720072007200720
[ 0.106845] x9 : 0720072007200720 x8 : 0720072007200720
[ 0.106875] x7 : 0720072d072d072d x6 : 0000000000000044
[ 0.106904] x5 : 0000000000000000 x4 : 0000000000000000
[ 0.106934] x3 : ffffffffffffffff x2 : f9b69bb55a180d00
[ 0.106964] x1 : 0000000000000000 x0 : 0000000000000024
[ 0.106994] Call trace:
[ 0.107017] has_cpuid_feature+0x90/0x340
[ 0.107044] setup_elf_hwcaps+0x50/0xd4
[ 0.107068] setup_cpu_features+0x5c/0x100
[ 0.107092] smp_cpus_done+0x34/0xa8
[ 0.107116] smp_init+0xf0/0x108
[ 0.107139] kernel_init_freeable+0xec/0x24c
[ 0.107166] kernel_init+0x18/0x110
[ 0.107189] ret_from_fork+0x10/0x1c
[ 0.107214] ---[ end trace 870841374e14badc ]---
[ 0.107238] CPU: All CPU(s) started at EL2

[Juerg Haefliger (juergh)]

4.15.0-1050-raspi2 seems ok.

[Juerg Haefliger (juergh)]

Only happens on arm64 but not on armhf.