[Xen-devel] booting domU guest as pvh works in xen-4.11.1 but fails in 4.12

[Pry Mar <pryorm09@xxxxxxxxx>]

Hello,

https://paste.debian.net/1077718/

I get a kernel panic as shown in the paste above no matter how I
launch pvh, with bootloader (pygrub), kernel direct (4.18+), or
pvgrub2 (i386-xen_pvh support).

The dom0 here is ub1804, kernel-4.18, and xen-4.12 with debian
packages (self built).
~$ sudo dpkg -l | grep -P 'xen|qemu' | grep '^ii'
ii  libxen-4.12:amd64      4.12.0-1+ub18u04.1                amd64
   Public libs for Xen
ii  libxenstore3.0:amd64  4.12.0-1+ub18u04.1                amd64
  Xenstore communications library for Xen
ii  libxentoolcore1:amd64  4.12.0-1+ub18u04.1                amd64
   helper for qemu & libxenstore
ii  qemuu     3.1.0-1+ub18u04.1                 amd64
qemu-system-i386 (3.1.0/xen-4.12) with 9pfs support
ii  xen-hypervisor-4.12-amd64             4.12.0-1+ub18u04.1
     amd64        Xen Hypervisor on AMD64
ii  xen-utils-4.12                        4.12.0-1+ub18u04.1
     amd64        XEN administrative tools
ii  xen-utils-common                      4.12.0-1+ub18u04.1
     all          Xen administrative tools - common files
ii  xen-virbr0                            0.1-2
     all          Setup a virbr0 bridge and dnsmasq on a
ii  xenstore-utils                        4.12.0-1+ub18u04.1
     amd64        Xenstore command line utilities for Xen

The same xl config and grub config works in xen-4.11.1. I've searched
for any new options in xl.cfg that could influence this, but nothing
catches my eye.

I get the same dmesg in other boot methods, but the i386-xen_pvh style
yields more info at the end. The (fire-missle) grub script is provided
Hans van Kranenburg .

Before the initrd unpacks I see many errors (line 201 of paste):
fuse init modprobe trap invalid opcode ip:7f797dc7bb95

But later the xen_netfront and xen_blkfront drivers load fine and then
trouble starts.

PryMar56,
##xen-packaging on Freenode IRC

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