[Bug 270811] ZFS/PowerPC: Issue after openzfs/zfs@431083f75 import

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 13 Apr 2023 00:46:56 UTC

            Bug ID: 270811
           Summary: ZFS/PowerPC: Issue after openzfs/zfs@431083f75 import
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: dbaio@freebsd.org

Created attachment 241454
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=241454&action=edit


after zfs: merge openzfs/zfs@431083f75 /
we can't boot the system anymore:

powernv_xscom0: <xscom> mem 0x603fc00000000-0x60403ffffffff on ofwbus0
Timecounter "timebase" frequency 512000000 Hz quality 1000
Event timer "decrementer" frequency 512000000 Hz quality 1000
Timecounters tick every 1.000 msec

fatal kernel trap:

   exception       = 0x800 (floating-point unavailable)
   srr0            = 0xc0000000033b8fd0 (0x10b8fd0)
   srr1            = 0x9000000000009032
   current msr     = 0x9000000000009032
   lr              = 0xc0000000024df3c0 (0x1df3c0)
   frame           = 0xc00800000000bfc0
   curthread       = 0xc000000003652e80
          pid = 0, comm = swapper

panic: floating-point unavailable trap
cpuid = 0
time = 1
KDB: stack backtrace:
0xc00800000000bbe0: at kdb_backtrace+0x60
0xc00800000000bcf0: at vpanic+0x1a0
0xc00800000000bda0: at panic+0x44
0xc00800000000bdd0: at trap+0x324
0xc00800000000bf00: at powerpc_interrupt+0x1cc
0xc00800000000bf90: kernel FPU trap by zfs_sha256_ppc: srr1=0x9000000000009032
            r1=0xc00800000000c240 cr=0x48200822 xer=0 ctr=0xc0000000024df3a0
r2=0xc0000000033f0000 frame=0xc00800000000bfc0
0xc00800000000c240: at -0x4
0xc00800000000c270: at SHA2Update+0x1f4
0xc00800000000c320: at abd_checksum_sha256+0x128
0xc00800000000c350: at abd_iterate_func+0x170
0xc00800000000c440: at abd_checksum_sha256+0x78
0xc00800000000c5a0: at chksum_fini+0x468
0xc00800000000c6b0: at chksum_fini+0x134
0xc00800000000c6f0: at chksum_init+0x23c
0xc00800000000c770: at spa_init+0x184
0xc00800000000c7f0: at zfs_kmod_init+0x38
0xc00800000000c860: at zfsdev_detach+0x478
0xc00800000000c8e0: at module_register_init+0xf8
0xc00800000000c980: at mi_startup+0x1f4
0xc00800000000ca50: at __start+0xc4
KDB: enter: panic
[ thread pid 0 tid 100000 ]
Stopped at      kdb_enter+0x70: ori     r0, r0, 0x0

After patch zfs-ppc-test_not_working.diff (provided by jhibbits) we get:

nda0 at nvme0 bus 0 scbus0 target 0 lun 1
nda0: <Samsung SSD 980 PRO with Heatsink 1TB 5B2QGXA7 S6WSNJ0W106430L>
nda0: Serial Number S6WSNJ0W106430L
nda0: nvme version 1.3 x4 (max x4) lanes PCIe Gen4 (max Gen4) link
nda0: 953869MB (1953525168 512 byte sectors)
nda1 at nvme1 bus 0 scbus1 target 0 lun 1
nda1: <Samsung SSD 980 PRO with Heatsink 1TB 5B2QGXA7 S6WSNJ0W103585P>
nda1: Serial Number S6WSNJ0W103585P
nda1: nvme version 1.3 x4 (max x4) lanes PCIe Gen4 (max Gen4) link
nda1: 953869MB (1953525168 512 byte sectors)
GEOM_MIRROR: Device mirror/swap0 launched (2/2).
Mounting from zfs:zroot failed with error 6; retrying for 3 more seconds
Mounting from zfs:zroot failed with error 6.

Loader variables:

Manual root filesystem specification:
  <fstype>:<device> [options]
      Mount <device> using filesystem <fstype>
      and with the specified (optional) option list.

    eg. ufs:/dev/da0s1a
        cd9660:/dev/cd0 ro
          (which is equivalent to: mount -t cd9660 -o ro /dev/cd0 /)

  ?               List valid disk boot devices
  .               Yield 1 second (for background tasks)
  <empty line>    Abort manual input


This machine is part of the FreeBSD cluster for building PowerPC packages, so
we can build kernels to test anytime necessary.


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