Bug 53361

Summary:	Wrong CPUID data returned by KVM
Product:	Virtualization	Reporter:	Kaloyan Ganchev (kaloqn.ganchev)
Component:	kvm	Assignee:	virtualization_kvm
Status:	NEW ---
Severity:	normal	CC:	consume.noise, IFAllison, ironiridis
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	3.2.0-37	Subsystem:
Regression:	No	Bisected commit-id:

Description Kaloyan Ganchev 2013-02-02 20:22:31 UTC

When booted like this
 kvm -cpu core2duo,+xsave -enable-kvm -m 8192 -drive file=freebsd-9.1-qcow2.img -boot d -net nic -net user -nographic -vnc :0  -cdrom ./isos/FreeBSD-9.1-RELEASE-amd64-disc1.iso 

Freebsd crash immediately after the loader with error;

CPU0 does not support X87 or SSE2 : 0

Without the xsave instruction the FreeBSD boot as expected.
I had response from the FreeBSD developers that CPUID should return  presence of the FPU extensions and since long mode capable CPU  , X87 and SSE2 should be present according to Unix amd64 ABI .
It seems this is not the case when xsave flag is set.

Comment 1 Chris Harrington 2014-08-04 16:55:19 UTC

Looks like the QEMU folks had a relevant change on this bug:

https://lists.gnu.org/archive/html/qemu-devel/2014-02/msg04140.html

Could you retest?

Comment 2 Ian Allison 2014-08-09 02:10:00 UTC

seems to be working for me now.

Comment 3 Daniel Martin 2019-04-08 15:02:06 UTC

(In reply to Ian Allison from comment #2)
> seems to be working for me now.

Could anyone close this bug, please?