re: port-amd64/59860: nvmm: support AVX2, AVX512, &c.

["matthew green via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR port-amd64/59860; it has been noted by GNATS.

From: matthew green <mrg%eterna23.net@localhost>
To: port-amd64-maintainer%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
    netbsd-bugs%netbsd.org@localhost, campbell+netbsd%mumble.net@localhost,
    gnats-bugs%netbsd.org@localhost
Cc: 
Subject: re: port-amd64/59860: nvmm: support AVX2, AVX512, &c.
Date: Mon, 13 Jul 2026 15:08:22 +1000

 Taylor pointed me at
 https://www.NetBSD.org/~riastradh/tmp/20260712/nvmmxr0assert.patch
 as a real fix, but unfortunately it has made things worse for me:
 
 fatal protection fault in supervisor mode
 trap type 4 code 0 rip 0xffffffff8023d36e cs 0x8 rflags 0x10246 cr2 0x743a=
 28a83428 ilevel 0x6 rsp 0xffffba1b8719bd78
 curlwp 0xffffb765ba18d800 pid 1590.1786 lowest kstack 0xffffba1b871972c0
 panic: trap
 cpu3: Begin traceback...
 vpanic() at netbsd:vpanic+0x189
 panic() at netbsd:panic+0x3c
 trap() at netbsd:trap+0xb35
 --- trap (number 4) ---
 xrstor() at netbsd:xrstor+0xa
 nvmm_ioctl() at nvmm:nvmm_ioctl+0xef6
 sys_ioctl() at netbsd:sys_ioctl+0x1fa
 syscall() at netbsd:syscall+0x9d
 --- syscall (number 54) ---
 
 when starting the nvmm VM.
 
 
 .mrg.