Re: [Xen-devel] [PATCH V2 14/25] x86/vvtd: Process interrupt remapping request

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 23.08.17 at 11:49, <roger.pau@xxxxxxxxxx> wrote:
> On Wed, Aug 09, 2017 at 04:34:15PM -0400, Lan Tianyu wrote:
>> @@ -384,6 +399,12 @@ struct iremap_entry {
>>  };
>>  
>>  /*
>> + * When VT-d doesn't enable Extended Interrupt Mode. Hardware only 
>> interprets
>> + * only 8-bits ([15:8]) of Destination-ID field in the IRTEs.
> 
> The above comment needs to be rewritten. My knowledge of VT-d is
> limited, what is IRTE referring to? I thought I was referring to the
> IO APIC redirection table registers, but the mask then doesn't make
> sense.

IRTE = Interrupt Remapping Table Entry (a term used quite
frequently); an IO-APIC one would normally be called just RTE.

Jan


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