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RE: [Xen-devel] passing hypercall parameters by pointer
| To: | "Sharma, Arun" <arun.sharma@xxxxxxxxx>, "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx> |
|---|---|
| Subject: | RE: [Xen-devel] passing hypercall parameters by pointer |
| From: | "Ling, Xiaofeng" <xiaofeng.ling@xxxxxxxxx> |
| Date: | Thu, 18 Aug 2005 08:47:54 +0800 |
| Cc: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Yu, Ke" <ke.yu@xxxxxxxxx> |
| Delivery-date: | Thu, 18 Aug 2005 00:46:23 +0000 |
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| Thread-index: | AcWjb6PixtZbp81jTl6bpLoseJDJbAAHmPAg |
| Thread-topic: | [Xen-devel] passing hypercall parameters by pointer |
Arun Sharma <mailto:arun.sharma@xxxxxxxxx> wrote: > Ian Pratt wrote: > The other alternative (which we talked about at OLS) is to use a > couple of pinned pages for parameter passing - but it doesn't work > very well for: > > a) Multiple levels of structures/pointers A good example is do_multicall. A complete implementation need to enum all the hypercall and try to deal with each hypercall if it uses points. > b) Arguments which may be bigger than a couple of pages > (xc_get_pfn_list() for a bigmem domain for example). > > -Arun _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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