Re: Windows XP internal Power error

[Michael Riepe <michael-0QoEqw4nQxo@public.gmane.org>]

Hi!

I found this footnote in my Intel docs (22.4):

> Processing of an entry fails in any of the following cases:
[...]
> • An attempt to write bits 127:64 to the MSR indexed by bits 31:0 of the entry
> would cause a general-protection exception if executed via WRMSR with CPL =
> 0.

And there's a footnote that says:

> Note the following about processors that support Intel 64 architecture. If CR0.PG = 1, WRMSR to
> the IA32_EFER MSR causes a general-protection exception if it would modify the LME bit. Since
> CR0.PG is always 1 in VMX operation, the IA32_EFER MSR should not be included in the
> VM-entry MSR-load area for the purpose of modifying the LME bit.

Might that be the reason?

ignazio.cassano@provincia.torino.it wrote:
> Now I execute:
> 
> 
> /usr/local/bin/qemu-system-x86_64 -no-acpi -hda 
> /root/winXP/windows_kvm.disk -boot c -m 512
> 
> 
> On the terminal where I execute the command the following appears:
> 
> unhandled vm exit:  0x80000022
> rax 0000000000000800 rbx 00000000ffdff120 rcx 00000000c0000080 rdx 
> 0000000000000000
> rsi 0000000000000000 rdi 00000000c0000080 rsp 0000000080548de8 rbp 
> 0000000080548e3c
> r8  0000000000000000 r9  0000000000000000 r10 0000000000000000 r11 
> 0000000000000000
> r12 0000000000000000 r13 0000000000000000 r14 0000000000000000 r15 
> 0000000000000000
> rip 00000000804fee82 rflags 00000006
> Aborted
> 
> Dmesg reports:
> 
> kvm: msrs: 6
[...]

-- 
Michael "Tired" Riepe <michael@mr511.de>
X-Tired: Each morning I get up I die a little

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