Re: [Xen-devel] PV drivers for HVM (PAE) guests

["Ky Srinivasan" <ksrinivasan@xxxxxxxxxx>]

Thanks. I will send you a patch.

Regards,

K. Y

>>> On Thu, Oct 19, 2006 at 10:12 AM, in message
<C15D4675.2CE6%Keir.Fraser@xxxxxxxxxxxx>, Keir Fraser
<Keir.Fraser@xxxxxxxxxxxx> wrote: 

> 
> 
> On 19/10/06 15:06, "Ky Srinivasan" <ksrinivasan@xxxxxxxxxx> wrote:
> 
>> We have a build issue when building for PAE guests -  the kernel symbol
>> __supported_pte_mask is not exported on any of the kernels of interest 
> (2.6.5,
>> 2.6.9, 2.6.16..) and is used in the function:  pfn_pte_ma (maddr.h) . In 
> this
>> scenario, this function is used only by the front- end drivers that are 
> running
>> within the unmodified guests.  Would it make sense to have an implementation
>> of the function pfn_pte_ma() only for consumption by the PV front- end driver
>> modules that does not depend on the __supported_pte_mask variable.
> 
> Sounds like the only option. I suggest a module- private version of the
> pte_mask which defaults to only a limited subset of PTE flags. Optionally
> you could add in _PAGE_NX if CPUID/EFER allows it.
> 
>  --  Keir


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