RE: git: 2a58b312b62f - main - zfs: merge openzfs/zfs@431083f75 [separate aarch64 panic for zpool import]

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From: Mark Millard <marklmi_at_yahoo.com>
Date: Fri, 07 Apr 2023 21:14:55 UTC

Turns out that as of this commit aarch64 (Cortex-A72 and Cortex-A57
examples reported) gets the following even when no zfs media is
present (UFS boot):

# zpool import
 x0: ffff0000f0fa9168 (ucom_cons_softc + efbf1bb8)
 x1: ffff0000ff900000 ($d.1 + afa318)
 x2: ffff0000ff900400 ($d.1 + afa718)
 x3: ffff0000fec1b0a4 (sha_incremental + 0)
 x4:                0
 x5:           100000
 x6:         8e16db93
 x7:                0
 x8: ffff0000feb06168 (tf_sha256_neon + 0)
 x9: ffff0000fea931fb ($d.1 + b)
x10: ffff0000feb045f4 (SHA2Update + f4)
x11:               29
x12:                1
x13:                0
x14:                0
x15:                2
x16: ffff0000feaf7500 ($d.0 + 0)
x17: ffff000000476cf0 (nanouptime + 0)
x18: ffff0000f0fa9000 (ucom_cons_softc + efbf1a50)
x19: ffff0000f0fa9168 (ucom_cons_softc + efbf1bb8)
x20:              400
x21: ffff0000ff900000 ($d.1 + afa318)
x22: ffff0000f0fa9198 (ucom_cons_softc + efbf1be8)
x23:                0
x24:                0
x25:                0
x26: ffff0000fed2df70 (sha256_neon_impl + 0)
x27:              203
x28:               31
x29: ffff0000f0fa9040 (ucom_cons_softc + efbf1a90)
 sp: ffff0000f0fa9000
 lr: ffff0000feb04668 (SHA2Update + 168)
elr: ffff0000feaf8684 (zfs_sha256_block_neon + 14)
spsr:         20000045
esr: 000000001fe00000
panic: VFP exception in the kernel
cpuid = 3
time = 1680786034
KDB: stack backtrace:
db_trace_self() at db_trace_self
db_trace_self_wrapper() at db_trace_self_wrapper+0x30
vpanic() at vpanic+0x13c
panic() at panic+0x44
do_el1h_sync() at do_el1h_sync+0x210
handle_el1h_sync() at handle_el1h_sync+0x10
--- exception, esr 0xffff0000f0fa9198
(null)() at 0x400
KDB: enter: panic
[ thread pid 1446 tid 100101 ]
Stopped at      kdb_enter+0x44: undefined       f905c27f
db> 

The above was produced via using an artifact build's
kernel based on that exact commit:

https://artifact.ci.freebsd.org/snapshot/main/2a58b312b62f908ec92311d1bd8536dbaeb8e55b/arm64/aarch64/kernel.txz

By contrast, the prior commit had an artifact build
as well, but it's kernel does not get the panic for
zpool import :

https://artifact.ci.freebsd.org/snapshot/main/b98fbf3781df16f7797b2bbeabf205dc7d4985ae/arm64/aarch64/kernel.txz

See also:

https://lists.freebsd.org/archives/freebsd-current/2023-April/003417.html

===
Mark Millard
marklmi at yahoo.com