Re: how can I find hypercall page address?

From: Andrew Cooper <andrew.cooper3@citrix.com>
To: big strong <fangtuo90@gmail.com>
Cc: xen-devel@lists.xen.org
Subject: Re: how can I find hypercall page address?
Date: Fri, 7 Aug 2015 14:06:32 +0100	[thread overview]
Message-ID: <55C4AD58.5060300@citrix.com> (raw)
In-Reply-To: <CAFnE1f0cz+Vnmccyp7Y+0TD=VLH=uoHe47Dgnx7W1kGWskVUkA@mail.gmail.com>

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On 07/08/15 02:52, big strong wrote:
> Or how can I get the address of hypercall page belonging to a running
> domU?

Please do not top post.

A domain may create an arbitrary quantity of hypercall pages, at any
address of their choosing.

You have not explained why you want this information.

~Andrew

>
> 2015-08-07 9:45 GMT+08:00 big strong <fangtuo90@gmail.com
> <mailto:fangtuo90@gmail.com>>:
>
>     I want to locate the hypercall page address when creating a new
>     domU, so as to locate hypercalls. Is it possible?
>
>     2015-08-06 17:49 GMT+08:00 Andrew Cooper
>     <andrew.cooper3@citrix.com <mailto:andrew.cooper3@citrix.com>>:
>
>         On 06/08/15 10:46, big strong wrote:
>>         The old version of Xen contains information about hypercall
>>         page like:
>>
>>         xl dmesg
>>         ......
>>         (XEN) HVM10: Allocated Xen hypercall page at 169ff000
>>         .......
>>
>>         But the new edition seems to miss this information.
>
>         Correct.  The information is not interesting or useful.
>
>>         How can I get the similar information then?
>
>         What are you trying to do?
>
>         ~Andrew
>
>
>

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