Re: port-xen/53863: panic: xen_failsafe_handler called! while running 32-bit binary on 64-bit.

[Brian Marcotte <marcotte%panix.com@localhost>]

The following reply was made to PR port-xen/53863; it has been noted by GNATS.

From: Brian Marcotte <marcotte%panix.com@localhost>
To: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
Cc: port-xen-maintainer%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
	netbsd-bugs%netbsd.org@localhost, gnats-bugs%NetBSD.org@localhost,
	Brian Marcotte <marcotte%panix.com@localhost>
Subject: Re: port-xen/53863: panic: xen_failsafe_handler called! while
 running 32-bit binary on 64-bit.
Date: Sun, 13 Jan 2019 23:15:23 -0500

 >  Do you have anything relevant in xl dmesg on the dom0 ? booting with
 >  a xen-debug.gz kernel may be needed to get usefull information
 
 Is xen-debug.gz still a thing? I don't see any reference to it in modern
 documentation. I've compiled with DEBUG and turned the log options to
 their max.
 
 This is Xen 4.10.3-pre (git around November 8) and dom0 is Linux 4.16.16.
 I had also seen the problem with slightly earlier versions of each.
 
 At domain start I get these:
 
 (XEN) grant_table.c:1770:d0v14 Expanding d1 grant table from 0 to 1 frames
 (XEN) d1 attempted to change d1v1's CR4 flags 00002660 -> 00000620
 (XEN) d1 L1TF-vulnerable L4e 0000000623ff8000 - Shadowing
 
 I now get this at the time of the NetBSD panic:
 
 (XEN) grant_table.c:1770:d1v0 Expanding d1 grant table from 1 to 2 frames
 (XEN) traps.c:1543: GPF (0088): ffff82d0802784ce [context_switch+0x91b/0xf89] -> ffff82d08037435b
 
 --
 - Brian