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xen-devel
RE: [Xen-devel] [PATCH 3/5] vtdt: Modify vlapic code to add vtdt support
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To: |
Keir Fraser <keir@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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Subject: |
RE: [Xen-devel] [PATCH 3/5] vtdt: Modify vlapic code to add vtdt support |
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From: |
"Wei, Gang" <gang.wei@xxxxxxxxx> |
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Date: |
Tue, 14 Dec 2010 16:22:18 +0800 |
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Cc: |
Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>, "Wei, Gang" <gang.wei@xxxxxxxxx> |
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Tue, 14 Dec 2010 00:24:20 -0800 |
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[Xen-devel] [PATCH 3/5] vtdt: Modify vlapic code to add vtdt support |
Keir Fraser wrote on 2010-12-14:
> On 14/12/2010 03:27, "Wei, Gang" <gang.wei@xxxxxxxxx> wrote:
>
>> diff -r d042ca4c6b68 xen/include/public/arch-x86/hvm/save.h
>> --- a/xen/include/public/arch-x86/hvm/save.h Thu Dec 09 22:33:02
>> 2010
>> +0800
>> +++ b/xen/include/public/arch-x86/hvm/save.h Thu Dec 09 22:33:06
>> +++ 2010
>> +++ +0800
>> @@ -265,6 +265,7 @@ struct hvm_hw_lapic {
>> uint64_t apic_base_msr;
>> uint32_t disabled; /* VLAPIC_xx_DISABLED */
>> uint32_t timer_divisor;
>> + uint64_t tdt_msr;
>> };
>
> Is this backward compatible with old HVM save images?
I am not sure about this. If it isn't, would you accept to simply add another
data trunk for TDT msr?
Jimmy
>
> We ought to support extending the size of existing HVM save
> structures, but I'm not sure that we do. Tim?
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