Joerg Roedel wrote: > On Mon, Apr 14, 2008 at 12:43:30PM +0300, Avi Kivity wrote: > >> Michal Ludvig wrote: >> >>> Hi all, >>> >>> in short: CentOS 5 guest (32bit) crashes when I run "reboot" in the VM with >>> qemu message: >>> kvm_run: failed entry, reason 65535 >>> kvm_run returned -8 >>> >>> In dmesg is this message: >>> kvm: 23769: cpu0 kvm_set_msr_common: MSR_IA32_MC0_STATUS 0x0, nop >>> >>> Details: >>> KVM 65 >>> Host is openSUSE 10.3 with my own 2.6.24, 64 bit >>> Guest is CentOS 5.1 with 2.6.18-53.1.14.el5, 32 bit >>> GCC 4.2.1 for module, GCC 3.3.3 for qemu >>> CPU "AMD Athlon(tm) 64 X2 Dual Core Processor 5600+" >>> >>> Everything works fine, except that I can't reboot the guest. In VNC it says >>> "md: stopping devices" and then Qemu exits with: >>> kvm_run: failed entry, reason 65535 >>> kvm_run returned -8 >>> >>> IIRC reboot used to work with kvm-64 >>> >>> >> I think two bugs are involved: >> >> - the guest invokes the triple-fault shutdown path, so it seems normal >> reboot doesn't work with iothread. Haven't looked as to why yet. >> - amd shutdown interception clears the vmcb, leaving asid == 0, which is >> illegal. Adding force_new_asid() fixes this. There are probably >> other issues with clearing the vmcb as well. >> >> Joerg, can you find out if the "vmcb is undefined" applies to the entire >> vmcb or just the guest saved state? Is there a way to >> differentiate between a guest initiated shutdown due to triple fault and the >> core melting down? >> > > Only the state saved in the VMCB is undefined after an intercepted > shutdown event.
The vmcb stores two types of states, guest state and control information. Are both undefined? > I am not sure if I understand your second question, what > do you mean with "core melting down" vs. guest initiated shutdown? > IIRC shutdown can occur not only as a result of triple faults, due to other internal errors or inconsistent state. Not sure about that though. -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
