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Re: [Qemu-devel] Prohibit Windows from running in QEMU
From: |
Laszlo Ersek |
Subject: |
Re: [Qemu-devel] Prohibit Windows from running in QEMU |
Date: |
Tue, 29 Oct 2013 15:12:26 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130912 Thunderbird/17.0.9 |
On 10/29/13 11:50, Peter Lieven wrote:
> On 29.10.2013 11:48, Paolo Bonzini wrote:
>> Il 29/10/2013 11:40, Peter Lieven ha scritto:
>>>> The KVM signature should be at CPUID leaf 0x40000100.
>>> If I enable hyperv for all vServers the signature is at
>>> KVM_CPUID_SIGNATURE_NEXT (0x40000100) otherwise
>>> at KVM_CPUID_SIGNATURE (0x0).
>> KVM_CPU_ID_SIGNATURE is 0x40000000.
>>
>>> Does this matter to Linux?
>> For recent versions it doesn't. Older versions will not be able to use
>> kvmclock (and other PV enhancements for KVM such as steal time or PV
>> EOI).
> Ok, so this is not an option today - maybe later...
>
> Any other idea to detect Windows is running or trying to start?
I don't know what I'm talking about. But:
- Maybe tracing MSR accesses could give you a "profile".
- Windows' ACPI parser is super cranky. You could pass in a custom (but
standardized) ACPI table on the command line (-acpitable) that only
triggers some warnings in Linux's port of ACPICA, but crashes Windows
(BSOD). Like, write & compile a simple table to AML, then mess it up
(eg. Package encoding or some such) with a hex editor. This would take
some experimentation as well, but searching existing bug reports could help.
Laszlo
- [Qemu-devel] Prohibit Windows from running in QEMU, Peter Lieven, 2013/10/29
- Re: [Qemu-devel] Prohibit Windows from running in QEMU, Paolo Bonzini, 2013/10/29
- Re: [Qemu-devel] Prohibit Windows from running in QEMU, Peter Lieven, 2013/10/29
- Re: [Qemu-devel] Prohibit Windows from running in QEMU, Paolo Bonzini, 2013/10/29
- Re: [Qemu-devel] Prohibit Windows from running in QEMU, Gleb Natapov, 2013/10/29
- Re: [Qemu-devel] Prohibit Windows from running in QEMU, Peter Lieven, 2013/10/29
- Re: [Qemu-devel] Prohibit Windows from running in QEMU, Paolo Bonzini, 2013/10/29
- Re: [Qemu-devel] Prohibit Windows from running in QEMU, Peter Lieven, 2013/10/29
- Re: [Qemu-devel] Prohibit Windows from running in QEMU,
Laszlo Ersek <=
- Re: [Qemu-devel] Prohibit Windows from running in QEMU, BALATON Zoltan, 2013/10/29
- Re: [Qemu-devel] Prohibit Windows from running in QEMU, Paolo Bonzini, 2013/10/29
- Re: [Qemu-devel] Prohibit Windows from running in QEMU, Peter Lieven, 2013/10/29
Re: [Qemu-devel] Prohibit Windows from running in QEMU, Michael S. Tsirkin, 2013/10/29
Re: [Qemu-devel] Prohibit Windows from running in QEMU, Li Guang, 2013/10/29