RE: [Xen-ia64-devel] PATCH [resend]: more case handled in mmio.c

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

>From:Tristan Gingold
>Sent: 2006年4月19日 15:34
>> Do we need to implement lazy fr algorithm?
>> If yes, we need to handle disabled fr fault and not need to save
>> all fr at domain switch.
>> If no, we can simply remove all ia64_fph_enable() and
>ia64_fph_disable()
>> in VMM.
>> What's your option?
>BTW, it appears we can't use fp lazy save/restore for VTi because
>disabled fp
>reg fault is delivered directly to the guest, isn't it ?
>
>Tristan.

No, you can since there's no architecture requirement to say 
disabled fp fault must been injected into guest directly. The 
reflection is there only because current code chooses that style 
which is same for both VTI and non-VTI domain. You can always 
change it if you'd like to add lazy algorithm in xen.

Thanks,
Kevin

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