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Date: Tue, 25 Aug 2015 12:43:21 +0500
From: Valentine Sinitsyn <valentine.sinitsyn@gmail.com>
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Subject: Re: [Qemu-devel] [RFC 2/4] hw/i386: Introduce AMD IOMMU
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To: David kiarie <davidkiarie4@gmail.com>
Cc: Jan Kiszka <jan.kiszka@web.de>, qemu-devel@nongnu.org, mst@redhat.com

On 25.08.2015 12:41, David kiarie wrote:
> On Tue, Aug 25, 2015 at 10:31 AM, Valentine Sinitsyn
[...snip...]
>> The spec doesn't say anything about this, I checked it. IIRC, I came across
>> this behavior when submitted COMPLETION_WAIT command with interrupts off and
>> spin in a while() loop waiting for the mask to be written. The loop never
>> finished, but everything worked as intended if I removed COM_COMPLETION_INTR
>> for the command.
>
> Is this behaviour useful in any way ?I'll try to fix this in the next version.
I don't think it's useful. The reason I posted this question was to 
check if this is a bug in silicon or intended behavior. If the latter, 
I'd suggest to emulate it.

Valentine