Re: KVM on Via Nano (Isaiah) CPUs? <Virus checked>

[Avi Kivity <avi@redhat.com>]

Andreas Tanz wrote:
> Hi!
>
>   
>>> The guest starts up showing the Bochs BIOS POST and stucks giving thousands of lines : 
>>> [15013.656923] returning from kvm_handle_exit, cause 3, retval = 1
>>>
>>>   
>>>       
>> What was the value of exit_reason?
>>
>>     
> kernel/x86/vmx.c:
> 3211 static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
> 3212 {
> ...
> 3273         if (exit_reason < kvm_vmx_max_exit_handlers
> 3274             && kvm_vmx_exit_handlers[exit_reason]){
> 3275                 int retval = kvm_vmx_exit_handlers[exit_reason](vcpu, kvm_run);
> 3276                 printk(KERN_WARNING "returning from kvm_handle_exit, cause 3, retval = %i"
> 3277                         ", exit_reason = %i\n"
> 3278                         ,retval, exit_reason);
> 3279                 // return kvm_vmx_exit_handlers[exit_reason](vcpu, kvm_run);
> 3280                 return retval;
> 3281         }
> 3282         else {
> 3283                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
> 3284                 kvm_run->hw.hardware_exit_reason = exit_reason;
> 3285         }
> 3286         printk(KERN_WARNING "returning from kvm_handle_exit\n
> 3287         return 0;
> 3288 }
> ...
>
> --> dmesg : 
> [79116.175571] returning from kvm_handle_exit, cause 3, retval = 1, exit_reason = 0
>   


That's an exception or nmi.  Next step is to instrument 
handle_exception() and see what happens there.  Please print out 
vect_info, intr_info, and kvm_rip_read(vcpu) (all as hex).

The more you instrument, of course, the better.

-- 
error compiling committee.c: too many arguments to function