Date: Sat, 2 Feb 2013 13:04:14 GMT From: Kaloyan Ganchev <kaloqn.ganchev@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: amd64/175780: Crash on KVM boot due to xsave instruction issue Message-ID: <201302021304.r12D4EOp031840@red.freebsd.org> Resent-Message-ID: <201302021310.r12DA0K6072877@freefall.freebsd.org>
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>Number: 175780 >Category: amd64 >Synopsis: Crash on KVM boot due to xsave instruction issue >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-amd64 >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sat Feb 02 13:10:00 UTC 2013 >Closed-Date: >Last-Modified: >Originator: Kaloyan Ganchev >Release: 9.1 >Organization: >Environment: >Description: When trying to boot FreeBSD 9.1 on kvm host with the following command: kvm -cpu core2duo,+xsave -enable-kvm -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 The kernel return the following error immediately after taking over from the loader: panic: CPU0 does not support X87 or SSE : 0 If I do not expose the xsave cpu flag to the FreeBSD guest the virtual machine boot as expected. This problem do not appear in 9.1 i386 and 9.0 amd64 releases. Also I tried several other cpu models instead of the core2duo and it doesn't make a difference, if xsave is exposed to the guest, FreeBSD 9.1 amd64 fails to boot with the error above. >How-To-Repeat: kvm -cpu core2duo,+xsave -enable-kvm -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 >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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