[Pkg-xen-devel] 4.3.0-3 fresh build - hvmloader Triple fault on VCPU0

[Moyer, Keith]

I've tracked down the issue to the seabios package being updated to 1.7.4-1 from 1.7.3-3.  When Xen is built with the older version, everything works fine.

In fact, I bisected the issue down to the following SeaBIOS commit:
http://review.coreboot.org/gitweb?p=seabios.git;a=commit;h=e144bb7af49ca8756b7222a75811f3b85b0bc1f5

I don't know if this group is interested in tracking down the regression, but you should be aware that any rebuilding of the Xen packages (even with the current source) will pull in this regression since seabios-1.7.4 is now in the Debian repositories.

________________________________________
From: Moyer, Keith
Sent: Monday, February 03, 2014 9:57 AM
To: pkg-xen-devel at lists.alioth.debian.org
Subject: 4.3.0-3 fresh build - hvmloader Triple fault on VCPU0

When using the 4.3.0-3/4.3.0-3+b1 xen packages from the Debian archive, things work fine.

However, when we compile the xen=4.3.0-3 source package ourselves, we run into an issue launching an HVM.  As soon as the HVM bios is loaded, VCPU0 gets a triple fault and the HVM is destroyed (this is with "loglvl=all guest_loglvl=all hvm_debug=3" boot options).

(XEN) HVM1: Multiprocessor initialisation:
(XEN) HVM1:  - CPU0 ... 46-bit phys ... fixed MTRRs ... var MTRRs [2/8] ... done.
(XEN) HVM1: Writing SMBIOS tables ...
(XEN) HVM1: Loading SeaBIOS ...
(XEN) hvm.c:1253:d1 Triple fault on VCPU0 - invoking HVM shutdown action 1.

If I just replace the "hvmloader" with the one from the Debian archive xen-utils-4.3 package, things begin to work again.

I've gone so far as to install/setup the sbuild system to try and mimic the Debian build environment, but I still run into the exact same issue.  I suspect it may be some of the new unstable versions of the build dependencies that are causing the issue.

Can somebody confirm whether they can build an HVM-functional version of Xen from the current unstable?  Any suggestions on how best to debug this build issue?

Thanks,

Keith Moyer
Software Architect/Engineer
Array Products

NetApp
316.636.8428 Direct Phone
keith.moyer at netapp.com
netapp.com