Linux kernel boot on x86 full system (FS) with --cpu-type=DerivO3CPU fails with: "Kernel panic - not syncing: Attempted to kill the idle task!" #16
Description
Boot works if I remove --cpu-type=DerivO3CPU.
Possible same on mailing list: https://www.mail-archive.com/gem5-users@gem5.org/msg14062.html but DeriveO3CPU not mentioned so I'm not sure.
Automated setup to reproduce: https://github.com/cirosantilli/linux-kernel-module-cheat/tree/cc347bbef76687f71e19a5e75f8a92f9e8ad6332#gem5-change-system-parameters
Full gem5 command:
M5_PATH='/data/git/linux-kernel-module-cheat/gem5/gem5-system' '/data/git/linux-kernel-module-cheat/gem5/gem5/build/X86/gem5.opt' '/data/git/linux-kernel-module-cheat/gem5/gem5/configs/example/fs.py' --command-l
ine='earlyprintk=ttyS0 console=ttyS0 lpj=7999923 root=/dev/hda nokaslr norandmaps printk.devkmsg=on printk.time=y' --disk-image='/data/git/linux-kernel-module-cheat/buildroot/output.x86_64-gem5~/images/rootfs.ext
2' --kernel='/data/git/linux-kernel-module-cheat/buildroot/output.x86_64-gem5~/build/linux-custom/vmlinux' --num-cpus=1 --caches --l1d_size=1024 --l2cache --l2_size=1024 --l3_size=1024 --cpu-type=DerivO3CPU
dmesg excerpt:
[ 0.010765] BUG: unable to handle kernel NULL pointer dereference at 000000000000022e
[ 0.010825] IP: text_poke_early+0x1f/0x27
[ 0.010855] PGD 0 P4D 0
[ 0.010879] Oops: 0002 [#1] SMP PTI
[ 0.010905] Modules linked in:
[ 0.010931] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.15.0 #1
[ 0.010971] Hardware name: , BIOS 06/08/2008
[ 0.011000] RIP: 0010:text_poke_early+0x1f/0x27
[ 0.011000] RSP: 0000:ffffffff81c03dd0 EFLAGS: 000008b8
[ 0.011000] RAX: 0000000000000291 RBX: ffffffff8200a228 RCX: 0000000000000000
[ 0.011000] RDX: 000000000000026c RSI: ffffffff81c03de9 RDI: 000000000000026c
[ 0.011000] RBP: ffffffff81c03de2 R08: ffffffff810145eb R09: 0000000000000005
[ 0.011000] R10: ffffffff81c03de2 R11: ffffffff81c03de2 R12: ffffffff820154c4
[ 0.011000] R13: ffffffff81fab2e0 R14: 0000000000000000 R15: 0000000000000000
[ 0.011000] FS: 0000000000000000(0000) GS:ffff88001fc00000(0000) knlGS:0000000000000000
[ 0.011000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.011000] CR2: 000000000000022e CR3: 0000000001c0a000 CR4: 00000000000006b0
[ 0.011000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 0.011000] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000000
[ 0.011000] Call Trace:
[ 0.011000] ? apply_paravirt.part.1+0x74/0x82
[ 0.011000] ? vprintk_emit+0x201/0x213
[ 0.011000] ? printk+0x3e/0x46
[ 0.011000] ? free_reserved_area+0x103/0x112
[ 0.011000] ? alternative_instructions+0xbf/0xcf
[ 0.011000] ? check_bugs+0x1be/0x2f2
[ 0.011000] ? start_kernel+0x4ac/0x4c3
[ 0.011000] ? secondary_startup_64+0xa5/0xb0
[ 0.011000] Code: 30 eb ba 31 c0 c3 b8 01 00 00 00 c3 49 89 f8 48 89 d1 9c 58 66 66 90 66 90 48 89 c2 fa 66 66 90 66 66 90 f3 a4 48 89 d7 57 9d 66 <66> 90 66 90 4c 89 c0 c3 41 57 41 56 41 55 41 54 55 53 48 89 fb
[ 0.011000] RIP: text_poke_early+0x1f/0x27 RSP: ffffffff81c03dd0
[ 0.011000] CR2: 000000000000022e
[ 0.011000] ---[ end trace 6d53c1c17a70e53c ]---
[ 0.011000] Kernel panic - not syncing: Attempted to kill the idle task!
[ 0.011000] ---[ end Kernel panic - not syncing: Attempted to kill the idle task!