https://bugzilla.kernel.org/show_bug.cgi?id=53361
Summary: Wrong CPUID data returned by KVM
Product: Virtualization
Version: unspecified
Kernel Version: 3.2.0-37
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: kvm
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
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.
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