[6.4.0-rc7-next-20230620] Boot failure on IBM Power LPAR

[Yu Zhao]

On Tue, Jun 20, 2023 at 05:41:57PM +0530, Sachin Sant wrote:
> 6.4.0-rc7-next-20230620 fails to boot on IBM Power LPAR with following

Sorry for hijacking this thread -- I've been seeing another crash on
NV since -rc1 but I haven't had the time to bisect. Just FYI.

[    0.814500] BUG: Unable to handle kernel data access on read at 0xc00a0000000003f9
[    0.814814] Faulting instruction address: 0xc000000000c77324
[    0.814988] Oops: Kernel access of bad area, sig: 11 [#1]
[    0.815185] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA PowerNV
[    0.815487] Modules linked in:
[    0.815653] CPU: 4 PID: 1 Comm: swapper/0 Not tainted 6.4.0-rc7 #1
[    0.815980] Hardware name: ZAIUS_FX_10      POWER9 (raw) 0x4e1202 opal:custom PowerNV
[    0.816293] NIP:  c000000000c77324 LR: c000000000c7c2c8 CTR: c000000000c77270
[    0.816525] REGS: c00020000a416de0 TRAP: 0300   Not tainted  (6.4.0-rc7)
[    0.816778] MSR:  9000000000009033 <SF,HV,EE,ME,IR,DR,RI,LE>  CR: 24008280  XER: 20040000
[    0.817113] CFAR: c000000000c772c8 DAR: c00a0000000003f9 DSISR: 40000000 IRQMASK: 1
[    0.817113] GPR00: c000000000c7c2c8 c00020000a417080 c000000001deea00 00000000000003f9
[    0.817113] GPR04: 0000000000000001 0000000000000000 c0000000027f3b28 c0000000016e0610
[    0.817113] GPR08: 0000000000000000 c000000002b9db10 c000000002b903e0 0000000084008282
[    0.817113] GPR12: 0000000000000000 c000003ffffdba00 c0000000000128c8 0000000000000000
[    0.817113] GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000007
[    0.817113] GPR20: c0000000027903f0 c0000000020034a4 c0000000029db000 0000000000000000
[    0.817113] GPR24: c0000000029dad70 c0000000029dad50 0000000000000000 0000000000000001
[    0.817113] GPR28: c000000002d57378 0000000000000000 c000000002d47378 c00a0000000003f9
[    0.820185] NIP [c000000000c77324] io_serial_in+0xb4/0x130
[    0.820383] LR [c000000000c7c2c8] serial8250_config_port+0x4b8/0x1680
[    0.820610] Call Trace:
[    0.820733] [c00020000a417080] [c000000000c768c8] serial8250_request_std_resource+0x88/0x200 (unreliable)
[    0.821221] [c00020000a4170c0] [c000000000c7be50] serial8250_config_port+0x40/0x1680
[    0.821623] [c00020000a417190] [c000000000c733ec] univ8250_config_port+0x11c/0x1e0
[    0.821956] [c00020000a4171f0] [c000000000c71824] uart_add_one_port+0x244/0x750
[    0.822244] [c00020000a417310] [c000000000c73958] serial8250_register_8250_port+0x3b8/0x780
[    0.822504] [c00020000a4173c0] [c000000000c7411c] serial8250_probe+0x14c/0x1e0
[    0.822833] [c00020000a417760] [c000000000cd87e8] platform_probe+0x98/0x1b0
[    0.823157] [c00020000a4177e0] [c000000000cd2a50] really_probe+0x130/0x5b0
[    0.823517] [c00020000a417870] [c000000000cd2f94] __driver_probe_device+0xc4/0x240
[    0.823827] [c00020000a4178f0] [c000000000cd3164] driver_probe_device+0x54/0x180
[    0.824096] [c00020000a417930] [c000000000cd3618] __driver_attach+0x168/0x300
[    0.824330] [c00020000a4179b0] [c000000000ccf468] bus_for_each_dev+0xa8/0x130
[    0.824650] [c00020000a417a10] [c000000000cd1ef4] driver_attach+0x34/0x50
[    0.825094] [c00020000a417a30] [c000000000cd112c] bus_add_driver+0x16c/0x310
[    0.825445] [c00020000a417ac0] [c000000000cd55d4] driver_register+0xa4/0x1b0
[    0.825787] [c00020000a417b30] [c000000000cd7548] __platform_driver_register+0x38/0x50
[    0.826037] [c00020000a417b50] [c00000000206be38] serial8250_init+0x1f8/0x270
[    0.826267] [c00020000a417c00] [c000000000012260] do_one_initcall+0x60/0x300
[    0.826529] [c00020000a417ce0] [c0000000020052c4] kernel_init_freeable+0x3c0/0x484
[    0.826883] [c00020000a417de0] [c0000000000128f4] kernel_init+0x34/0x1e0
[    0.827187] [c00020000a417e50] [c00000000000d014] ret_from_kernel_user_thread+0x14/0x1c
[    0.827595] --- interrupt: 0 at 0x0
[    0.827722] NIP:  0000000000000000 LR: 0000000000000000 CTR: 0000000000000000
[    0.827951] REGS: c00020000a417e80 TRAP: 0000   Not tainted  (6.4.0-rc7)
[    0.828162] MSR:  0000000000000000 <>  CR: 00000000  XER: 00000000
[    0.828394] CFAR: 0000000000000000 IRQMASK: 0
[    0.828394] GPR00: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    0.828394] GPR04: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    0.828394] GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    0.828394] GPR12: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    0.828394] GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    0.828394] GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    0.828394] GPR24: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    0.828394] GPR28: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    0.831329] NIP [0000000000000000] 0x0
[    0.831445] LR [0000000000000000] 0x0
[    0.831554] --- interrupt: 0
[    0.831664] Code: 7bc30020 eba1ffe8 ebc1fff0 ebe1fff8 4e800020 60000000 60420000 3d2200db 3929f110 ebe90000 7fe3fa14 7c0004ac <8bdf0000> 0c1e0000 4c00012c 57de063e
[    0.832263] ---[ end trace 0000000000000000 ]---