Re: [Xen-devel] [PATCH 3/5] vtdt: Modify vlapic code to add vtdt support

[Keir Fraser <keir@xxxxxxx>]

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?

We ought to support extending the size of existing HVM save structures, but
I'm not sure that we do. Tim?

 -- Keir



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