Date: Fri, 7 Apr 2023 13:06:14 +0000 From: John F Carr <jfc@mit.edu> To: "freebsd-arm@freebsd.org" <freebsd-arm@FreeBSD.org> Subject: Another VFP-in-kernel problem on armv8 Message-ID: <911B8107-4FAC-4180-97D0-49B44212B788@mit.edu>
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I upgraded from mid-February CURRENT (5dc00f00b747) to yesterday (f02879f19=
925) and my system panics during boot with
panic: VFP exception in the kernel
Most likely this panic is while trying to import the root ZFS pool. The cr=
ash is at the first vector instruction in zfs_sha256_block_neon (in zfs.ko)=
:
f9284: 4cdf7020 ld1 { v0.16b }, [x1], #16
This instruction is implemented on my CPU (Cortex A-57), confirmed by runni=
ng it in user mode.
I don't see any obviously related changes in ZFS since the last working ker=
nel. What's going on recently with VFP in the kernel?
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