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Subject: Re: [Qemu-devel] [RFC v1] Add declarations for hierarchical memory
 region API
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To: Anthony Liguori <anthony@codemonkey.ws>
Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, Richard Henderson <rth@twiddle.net>

On 05/20/2011 05:46 PM, Anthony Liguori wrote:
> On 05/20/2011 09:40 AM, Richard Henderson wrote:
>> On 05/20/2011 07:31 AM, Anthony Liguori wrote:
>>> But is this a characteristic of devices or is this a characteristic 
>>> of the chipset/CPU?
>>
>> Chipset.
>
> So if the chipset only allows accesses that are 64-bit, then you'll 
> want to have hierarchical dispatch filter non 64-bit accesses and 
> raise an MCE appropriately.
>
> So you don't need anything in MemoryRegion, you need code in the 
> dispatch path.

MemoryRegion *is* the dispatch path.  Only done declaratively so we can 
flatten it whenever it changes.

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.