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Re: [Xen-devel] why was XENMEM_translate_gpfn_list removed

from [Keir Fraser] [Permanent Link][Original]
To: "yzhang.unc@xxxxxxxxx" <yzhang.unc@xxxxxxxxx>, "Xen-devel@xxxxxxxxxxxxxxxxxxx" <Xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] why was XENMEM_translate_gpfn_list removed
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Thu, 26 Aug 2010 08:28:14 +0100
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On 26/08/2010 00:59, "Ian Zhang" <yzhang.unc@xxxxxxxxx> wrote:

> Why was XENMEM_translate_gpfn_list removed in Xen 4.0. How to achieve
> similar purpose in HVM?

It's not needed, since all hypercalls on an HVM guest refer to guest
pseudo-physical addresses. Keeping translate_gpfn_list just encouraged lazy
programmers to design bad hypervisor interfaces.

 -- Keir

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