On 3/28/06, Jens Axboe <[EMAIL PROTECTED]> wrote: > > monitor/mwait feature present. > > using mwait in idle threads. > > [snip] > > > invalid operand: 0000 [#1] > > Modules linked in: > > CPU: 0 > > EIP: 0060:[<c0101147>] Not tainted VLI > > EFLAGS: 00010246 (2.6.14-1.1656_FC4) > > EIP is at mwait_idle+0x2f/0x41 > > I don't think qemu supports PNI, which includes the monitor/mwait > additions. I wonder why Linux detects that. You can probably get around > it for now by either passing idle=poll as a boot parameter, or compile > your kernel for plain i586 for instance.
It seems that with -kernel-kqemu, the guest kernel is seeing the CPUID of the host machine rather than the one normally generated by qemu. The workarounds you suggest do work--thanks for your help. However, ideally kqemu would trap the CPUID instruction and mask the feature bits for unsupported CPU features. --Ed
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