Re: [RFT] kvm with Windows optimization

Anthony Liguori
2007-10-29T13:29:06Z

Dong, Eddie wrote:
> Anthony Liguori wrote:
>
>> Dong, Eddie wrote:
>>
>>>> BTW, is it wise to enable this by default for all guests?
>>>> Ignoring the
>>>> fact that we're modifying guest's memory without its knowledge, if a
>>>> guest unmaps the VA mappings for the BIOS then all sorts of
>>>> problems could occur.
>>>>
>>>>
>>>>
>>> Good movement!
>>>
>>> But, Vista won't work with patching. The memory guard in vista
>>> will make the system refuse to service. Maybe we need a option to
>>> check if it is vista.
>>>
>>>
>> FWIW, I successfully installed and booted Vista Enterprise Edition
>> with the TPR optimization patch.
>>
>>
> 32 bits or 64 bits?
> See
> http://blogs.msdn.com/windowsvistasecurity/archive/2006/08/11/695993.asp
> x
>
> It says:
>
> There are many brand new security features in Windows Vista, but Kernel
> Patch Protection is actually not one of them. Kernel Patch Protection
> was first supported on x64 (AMD64 and Intel EMT64T) CPU architecture
> versions of Microsoft Windows including Microsoft Windows Server 2003
> SP1 and Windows XP Microsoft Windows XP Professional x64 Edition. (Patch
> protection is currently not supported on x86 or ia64 architectures.)
> Though, as the use of 64-bit computers is increasing, Windows Vista
> users will end up benefiting most from this technology.
>
> Seems Vista 32 is not using patchguard yet, not sure about next SP.
> If above is true, it looks like we are OK for current stage.
> thx,eddie
>

I tested 32-bit Vista. We'll have to try 64-bit Vista and see if it
gets upset.

Regards,

Anthony Liguori