Re: [BUG][PATCH?] kvm: unhandled wrmsr: 0xc0000083

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Luca Tettamanti wrote:
> In order to reactivate the CPU after the reset. When the guest reboots I
> get an unhandled vm exit:
>
> unhandled vm exit:  0x80000021
> rax 0000000000000000 rbx 0000000000000000 rcx 0000000000000000 rdx 0000000000000600
> rsi 0000000000000000 rdi 0000000000000000 rsp 0000000000000000 rbp 0000000000000000
> r8  0000000000000000 r9  0000000000000000 r10 0000000000000000 r11 0000000000000000
> r12 0000000000000000 r13 0000000000000000 r14 0000000000000000 r15 0000000000000000
> rip 000000000000fff2 rflags 00000002
> cs f000 (000f0000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
> ds 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
> es 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
> ss 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
> fs 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
> gs 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
> tr 0080 (10850000/00002088 p 1 dpl 0 db 0 s 0 type b l 0 g 0 avl 0)
> ldt 0000 (00000000/0000ffff p 1 dpl 0 db 0 s 0 type 2 l 0 g 0 avl 0)
> gdt 0/ffff
> idt 0/ffff
> cr0 60000010 cr2 0 cr3 0 cr4 0 cr8 0 efer 0
>
> which is a vm entry failure due to invalid guest state (RIP looks good
> though :P)
>   

Actually 0xfff2 is in the middle of an instruction.

I'm guessing an 'out' instruction triggered the reboot, and 
skip_emulated_instruction() added 2 to rip.

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


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