Re: panic shortly after boot when amdgpu.ko is loaded (fpu?)

From: Konstantin Belousov <kostikbel_at_gmail.com>
Date: Fri, 27 Nov 2020 20:10:01 +0200
On Thu, Nov 26, 2020 at 10:09:24PM -0700, Rebecca Cran wrote:
> I have a Threadripper 2990WX system that I recently installed an AMD Radeon
> Pro W5700 into. It runs fine unless I load the amdgpu driver, at which point
> it panics several seconds after boot: I have enough time to login and run a
> few commands, but even if I just leave it it'll panic.  I'm running:
> 
> 
> FreeBSD photon.int.bluestop.org 13.0-CURRENT FreeBSD 13.0-CURRENT #0
> 6db1a3e8098-c273171(master): Thu Nov 26 01:26:17 MST 2020 bcran_at_photon.int.bluestop.org:/usr/obj/usr/src/amd64.amd64/sys/GENERIC-NODEBUG
> amd64
> 
> 
> I rebuilt the drm-current-kmod-5.4.62.g20201109_1 port today.
> 
> 
> The panic is:
> 
> Fatal trap 9: general protection fault while in kernel mode
> cpuid = 24; apic id = 18
> instruction pointer	= 0x20:0xffffffff81002dcf
> stack pointer	        = 0x0:0xfffffe016e6ffaa0
> frame pointer	        = 0x0:0xfffffe016e6ffaa0
> code segment		= base 0x0, limit 0xfffff, type 0x1b
> 			= DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags	= interrupt enabled, resume, IOPL = 0
> current process		= 4372 (hald)
> trap number		= 9
> panic: general protection fault
> cpuid = 24
> time = 1606450595
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe016e6ff7b0
> vpanic() at vpanic+0x181/frame 0xfffffe016e6ff800
> panic() at panic+0x43/frame 0xfffffe016e6ff860
> trap_fatal() at trap_fatal+0x387/frame 0xfffffe016e6ff8c0
> trap() at trap+0x8e/frame 0xfffffe016e6ff9d0
> calltrap() at calltrap+0x8/frame 0xfffffe016e6ff9d0
> --- trap 0x9, rip = 0xffffffff81002dcf, rsp = 0xfffffe016e6ffaa0, rbp = 0xfffffe016e6ffaa0 ---
> fpurestore_xrstor3264() at fpurestore_xrstor3264+0x2f/frame 0xfffffe016e6ffaa0
> restore_fpu_curthread() at restore_fpu_curthread+0x85/frame 0xfffffe016e6ffac0
> fpudna() at fpudna+0x3a/frame 0xfffffe016e6ffae0
> trap() at trap+0x246/frame 0xfffffe016e6ffbf0
> calltrap() at calltrap+0x8/frame 0xfffffe016e6ffbf0
> --- trap 0x16, rip = 0x80067137f, rsp = 0x7fffffffd8b0, rbp = 0x7fffffffd8f0 ---
> Uptime: 1m4s
> Dumping 4193 out of 130894 MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..91%
> 
> 
> I've uploaded details (core.txt, dmesg.txt etc.) to
> https://bsdio.com/freebsd/crashes/2020-11-26-amdgpu/ and the vmcore file is
> available on request.

And what is the instruction at 0xffffffff81002dcf ?
Received on Fri Nov 27 2020 - 17:10:36 UTC

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