Re: Tracing NetBSD sun4v issues

[Palle Lyckegaard <palle%netbsd.org@localhost>]

On Tue, 20 Oct 2026, Sad Clouds wrote:

> >
> # ldm -V
>
> Logical Domains Manager (v 3.3.0.0.17)
>        Hypervisor control protocol v 1.7
>        Using Hypervisor MD v 1.4
>
> System PROM:
>        Hypervisor      v. 1.10.7.      @(#)Hypervisor 1.10.7.h 2016/03/11 07:13\015
>
>        OpenBoot        v. 4.33.6.      @(#)OpenBoot 4.33.6.g 2016/03/11 06:05

The T4 ldom system I have access to:

Logical Domains Manager (v 3.6.2.0.90)
        Hypervisor control protocol v 1.12
        Using Hypervisor MD v 1.4

System Firmware:
        Sun System Firmware 8.9.11 2018/11/28 07:59

System PROM:
        Hostconfig      v. 1.4.15       @(#)Hostconfig 1.4.15 2018/11/28 
07:49
        Hypervisor      v. 1.15.16      @(#)Hypervisor 1.15.16 2018/11/28 
07:41
        OpenBoot        v. 4.38.16      @(#)OpenBoot 4.38.16 2018/11/28 
07:24


> [   1.0000000] "console" at vbus0 not configured
> [   1.0000000] cbus0 at vbus0
> [   1.0000000] vdsk0 at cbus0 chan 0x0: ivec 0x0, 0x1panic: cbus_intr_establish: sun4v_intr_setenabled(200, 0) failed - err = 6
>
> [   1.0000000] cpu0: Begin traceback...
> [   1.0000000] cpu0: End traceback...
> Stopped in pid 0.0 (system) at  netbsd:cpu_Debugger+0x4:        nop

Thanks for providing the detailed output.

I will have a look at the issue.

For the reference here is the console output from the t4 ldom system:

Boot device: /virtual-devices@100/channel-devices@200/disk@0  File and 
args:
NetBSD IEEE 1275 Multi-FS Bootblock
Version $NetBSD: bootblk.fth,v 1.18 2025/02/28 09:07:12 andvar Exp $
> > NetBSD/sparc64 OpenFirmware Boot, Revision 1.20 (Tue Oct 20 14:51:05 
UTC 2026)
=0xd4f538
Loading netbsd: 13956344+516584+330992 [773448+507649]=0x1308500
[   1.0000000] sun4v_interrupt_init: hv interrupt api major is now: 3
[   1.0000000] Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 
2003,
[   1.0000000]     2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 
2013,
[   1.0000000]     2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 
2023,
[   1.0000000]     2024, 2025, 2026
[   1.0000000]     The NetBSD Foundation, Inc.  All rights reserved.
[   1.0000000] Copyright (c) 1982, 1986, 1989, 1991, 1993
[   1.0000000]     The Regents of the University of California.  All 
rights reserved.

[   1.0000000] NetBSD 11.99.9 (GENERIC) #0: Tue Oct 20 14:51:05 UTC 2026
[   1.0000000] 
mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/sparc64/compile/GENERIC
[   1.0000000] total memory = 4096 MB
[   1.0000000] avail memory = 3987 MB
[   1.0000000] mainbus0 (root): ORCL,SPARC-T4-1 (SPARC T4-1): hostid 
xxxxxxxx
[   1.0000000] cpu0 at mainbus0: cpu @ 2847.862 MHz, CPU id 0
[   1.0000000] cpu0: system tick frequency 999.250 MHz
[   1.0000000] cpu0: 16K instruction (32 b/l), 16K data (32 b/l), 128K 
external (32 b/l)
[   1.0000000] cpu at mainbus0 not configured
[   1.0000000] reboot-memory at mainbus0 not configured
[   1.0000000] vbus0 at mainbus0
[   1.0000000] "flashprom" at vbus0 not configured
[   1.0000000] "random-number-generator" at vbus0 not configured
[   1.0000000] "console" at vbus0 not configured
[   1.0000000] cbus0 at vbus0
[   1.0000000] vnet0 at cbus0 chan 0x0: ivec 0x0, 0x1, address 
yy:yy:yy:yy:yy:yy
[   1.0000000] vdsk0 at cbus0 chan 0x3: ivec 0x6, 0x7
[   1.0000000] scsibus0 at vdsk0: 2 targets, 1 lun per target
[   1.0000000] vdsk1 at cbus0 chan 0x4: ivec 0x8, 0x9
[   1.0000000] scsibus1 at vdsk1: 2 targets, 1 lun per target
[   1.0000000] vdsk2 at cbus0 chan 0x5: ivec 0xa, 0xb
[   1.0000000] scsibus2 at vdsk2: 2 targets, 1 lun per target
[   1.0000000] vdsk3 at cbus0 chan 0x6: ivec 0xc, 0xd
[   1.0000000] scsibus3 at vdsk3: 2 targets, 1 lun per target
[   1.0000000] vdsk4 at cbus0 chan 0x7: ivec 0xe, 0xf
[   1.0000000] scsibus4 at vdsk4: 2 targets, 1 lun per target
[   1.0000000] "pciv-communication" at cbus0 not configured
[   1.0000000] "virtual-domain-service" at cbus0 not configured
[   1.0000000] vrtc0 at vbus0
[   1.0000000] pcons0 at mainbus0
[   1.0000000] WARNING: system needs entropy for security; see entropy(7)
[   1.0000126] No counter-timer -- using %stick at 999.250MHz as system 
clock.
[   1.0000126] sd0 at scsibus0 target 1 lun 0: <SUN, Virtual Disk, 1.1> 
disk fixed
[   1.0000126] sd0: fabricating a geometry
[   1.0000126] sd0: 20480 KB, 20 cyl, 64 head, 32 sec, 512 bytes/sect x 
40960 sectors
[   1.0000126] sd0: fabricating a geometry
[   1.0000126] sd1 at scsibus1 target 1 lun 0: <SUN, Virtual Disk, 1.1> 
disk fixed
[   1.0000126] sd1: fabricating a geometry
[   1.0000126] sd1: 20480 MB, 20480 cyl, 64 head, 32 sec, 512 bytes/sect x 
41943040 sectors
[   1.0000126] sd1: fabricating a geometry
[   1.0000126] sd2 at scsibus2 target 1 lun 0: <SUN, Virtual Disk, 1.1> 
disk fixed
[   1.0000126] sd2: fabricating a geometry
[   1.0000126] sd2: 30720 MB, 30720 cyl, 64 head, 32 sec, 512 bytes/sect x 
62914560 sectors
[   1.0000126] sd2: fabricating a geometry
[   1.0106860] cd0 at scsibus3 target 1 lun 0: <SUN, Virtual CDROM, 1.1> 
cdrom removable
[   1.0106860] cd1 at scsibus4 target 1 lun 0: <SUN, Virtual CDROM, 1.1> 
cdrom removable
[   1.0106860] swwdog0: software watchdog initialized
[   1.0106860] root on sd0a dumps on sd0b
[   1.0106860] root file system type: ffs
[   1.0106860] kern.module.path=/stand/sparc64/11.99.9/modules
erase ^?, werase ^W, kill ^U, intr ^C

You are using a serial console, we do not know your terminal emulation.
Please select one, typical values are:

	vt100
	ansi
	xterm

Terminal type (just hit ENTER for 'vt220'): [   5.0506637] entropy: best 
effort