From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wen Congyang <wency@cn.fujitsu.com>
Subject: Re: [RFC Patch v2 01/16] xen: introduce new hypercall
 to reset vcpu
Date: Tue, 06 Aug 2013 14:47:01 +0800
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To: Tim Deegan <tim@xen.org>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>, Jiang Yunhong <yunhong.jiang@intel.com>, Dong Eddie <eddie.dong@intel.com>, Ye Wei <wei.ye1987@gmail.com>, xen-devl <xen-devel@lists.xen.org>, Hong Tao <bobby.hong@huawei.com>, Xu Yao <xuyao.xu@huawei.com>, Shriram Rajagopalan <rshriram@cs.ubc.ca>
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At 08/01/2013 07:48 PM, Tim Deegan Wrote:
> Hi,
> 
> At 16:35 +0800 on 11 Jul (1373560533), Wen Congyang wrote:
>> In colo mode, SVM is running, and it will create pagetable, use gdt...
>> When we do a new checkpoint, we may need to rollback all this operations.
>> This new hypercall will do this.
> 
> Can you do what you need with XEN_DOMCTL_setvcpucontext(domid, vcpuid, NULL)?
> If not, maybe some small extensions to that call would be enough?

I will try it.

> 
> I think if we do need an entirely new hypercall, it should be part of
> the DOMCTL call along with the other vcpu operations, rather than having
> a new top-level hypercall of its own.

If setvcpucontext() can't work, I will add a new subop to DOMCTL instead of
a new hypercall.

Thanks
Wen Congyang

> 
> Cheers,
> 
> Tim.
>