[BUG] powerpc: boot warning in msi_bitmap_selftest() on Power11 on next-20260629

From: Venkat Rao Bagalkote <hidden>
Date: 2026-06-30 05:51:53
Also in: lkml

Greetings!!!

I am seeing below boot warning on linux-next20260629 kernel, while 
booting on IBM Power11 system.


Warning:

[    1.213209] ------------[ cut here ]------------
[    1.213213] WARNING: arch/powerpc/sysdev/msi_bitmap.c:181 at 
test_basics+0x1b8/0x3d4, CPU#1: swapper/0/1
[    1.213222] Modules linked in:
[    1.213230] CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted 
7.2.0-rc1-next-20260629 #1 PREEMPT(lazy)
[    1.213236] Hardware name: IBM,9080-HEX Power11 (architected) 
0x820200 0xf000007 of:IBM,FW1110.01 (NH1110_069) hv:phyp pSeries
[    1.213242] NIP:  c000000003028f84 LR: c000000003028f78 CTR: 
c000000000183dd8
[    1.213246] REGS: c000000005b43830 TRAP: 0700   Not tainted 
(7.2.0-rc1-next-20260629)
[    1.213251] MSR:  8000000000029033 <SF,EE,ME,IR,DR,RI,LE>  CR: 
44000244  XER: 20040003
[    1.213262] CFAR: c000000000183ec0 IRQMASK: 0
[    1.213262] GPR00: c000000003028f78 c000000005b43af0 c00000000200c100 
0000000000000200
[    1.213262] GPR04: 0000000000000000 0000000000000001 0000000000000240 
0000000000000000
[    1.213262] GPR08: 0000000000000000 0000000000000001 c000000005bd5d00 
ffffffffffffffc1
[    1.213262] GPR12: c000000000183dd8 c0000002fffffb00 c000000000011714 
0000000000000000
[    1.213262] GPR16: 0000000000000000 0000000000000000 0000000000000000 
0000000000000000
[    1.213262] GPR20: 0000000000000000 0000000000000000 0000000000000000 
0000000000000000
[    1.213262] GPR24: 0000000000000000 0000000000000000 c0000000030ab8b8 
0000000000000007
[    1.213262] GPR28: 0000000000000000 c0000000030ab870 c000000005c12900 
0000000000000000
[    1.213308] NIP [c000000003028f84] test_basics+0x1b8/0x3d4
[    1.213313] LR [c000000003028f78] test_basics+0x1ac/0x3d4
[    1.213317] Call Trace:
[    1.213319] [c000000005b43af0] [c000000003028f78] 
test_basics+0x1ac/0x3d4 (unreliable)
[    1.213325] [c000000005b43b60] [c000000003029444] 
msi_bitmap_selftest+0x2c/0x44
[    1.213331] [c000000005b43bc0] [c000000000010eec] 
do_one_initcall+0x7c/0x42c
[    1.213337] [c000000005b43ca0] [c0000000030109c8] 
do_initcalls+0x144/0x18c
[    1.213344] [c000000005b43d30] [c000000003010c9c] 
kernel_init_freeable+0x1f4/0x294
[    1.213350] [c000000005b43dd0] [c000000000011738] kernel_init+0x2c/0x1c4
[    1.213355] [c000000005b43e30] [c00000000000debc] 
ret_from_kernel_user_thread+0x14/0x1c
[    1.213361] ---- interrupt: 0 at 0x0
[    1.213366] Code: 38610028 4bfda729 54630ffe 0b030000 37ffffff 
4082ffe8 38800001 38610028 4bfda70d 39200001 2c030000 7d20481e 
<0b090000> eba10030 7ffefb78 3bff0001
[    1.213382] ---[ end trace 0000000000000000 ]---


Attached is the config file.


If you happen to fix this, please add below tag.

Reported-by: Venkat Rao Bagalkote <redacted>


Regards,

Venkat.

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