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RE: [Xen-devel] Re: APIC rework

To: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: RE: [Xen-devel] Re: APIC rework
From: "Zhang, Xiantao" <xiantao.zhang@xxxxxxxxx>
Date: Mon, 16 Nov 2009 18:38:18 +0800
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Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Han, Weidong" <weidong.han@xxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
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Thread-topic: [Xen-devel] Re: APIC rework
Hi, Keir/Jeremy
   After you picking the two patches into upstream, we found it may break old 
dom0 when assigned a level-triggered devices to a HVM domain.  The casue is 
that, old dom0 can't provide trigger mode and polarity when they do 
map_domain_pirq.  In attached patches, they introduce a bit to indicate whether 
old dom0 or not.  

xen-introduce-a-bit-to-identify-dom0-type.patch:  for hypervisor. 
0001-x86-Introduce-a-bit-MAP_COMPAT-mode-for-MAP_PIRQ_TY.patch: for pv ops 


Keir Fraser wrote:
> On 13/11/2009 23:57, "Jeremy Fitzhardinge" <jeremy@xxxxxxxx> wrote:
>>> Sure, I'll check it in.
>> How would you feel about backporting this into a stable release?  If
>> we start using this interrupt setup mechanism it will be a
>> red-letter day for dom0/xen compatibility.
> There probably won't be another stable release until 4.0 now. There
> will be a 3.4.3 about the same time though.
>  -- Keir

Attachment: 0001-x86-Introduce-a-bit-MAP_COMPAT-mode-for-MAP_PIRQ_TY.patch
Description: 0001-x86-Introduce-a-bit-MAP_COMPAT-mode-for-MAP_PIRQ_TY.patch

Attachment: xen-introduce-a-bit-to-identify-dom0-type.patch
Description: xen-introduce-a-bit-to-identify-dom0-type.patch

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