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xen-devel
Re: Need debugging help : RE: [Xen-devel] Problems creating DomUs on the
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To: |
"Puthiyaparambil, Aravindh" <aravindh.puthiyaparambil@xxxxxxxxxx> |
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Subject: |
Re: Need debugging help : RE: [Xen-devel] Problems creating DomUs on the ES7000s |
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From: |
Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
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Date: |
Wed, 28 Sep 2005 17:18:17 +0100 |
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Cc: |
"Koren, Bradley J" <Bradley.Koren@xxxxxxxxxx>, Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, "Vessey, Bruce A" <Bruce.Vessey@xxxxxxxxxx>, "Subrahmanian, Raj" <raj.subrahmanian@xxxxxxxxxx> |
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Wed, 28 Sep 2005 16:11:01 +0000 |
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On 28 Sep 2005, at 16:59, Puthiyaparambil, Aravindh wrote:
I have been looking into the problem. The alignment check is happening
on a "lock cmpxchg8b". Is it possible for ACs to happen when going
across page boundaries on cmpxchg8b in CPL 0? Is there any scenario
when
ACs can happen with cmpxchg8b in CPL 0?
The reference manuals say that this type of fault can only occur when
CPL=3.
The description of CMPXCHG8B does not place any restrictions on the
alignment of the memory operand.
-- Keir
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