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RE: [Xen-ia64-devel] [Xen-devel] Call hypercall straightly from user spa

To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, "Tristan Gingold" <tgingold@xxxxxxx>
Subject: RE: [Xen-ia64-devel] [Xen-devel] Call hypercall straightly from user space
From: "Xu, Anthony" <anthony.xu@xxxxxxxxx>
Date: Sun, 31 Dec 2006 12:20:25 +0800
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, xen-ia64-devel <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>
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Thread-topic: [Xen-ia64-devel] [Xen-devel] Call hypercall straightly from user space
Keir Fraser write on 2006年12月30日 23:58:
> On 30/12/06 3:22 pm, "Tristan Gingold" <tgingold@xxxxxxx> wrote:
>>> As you mention before, we may call hypercall straightly from user
>>> space rather than bouncing through guest kernel.
>> Hi,
>> I haven't found the reference, but how security is addressed ?  How
>> to prevent a user process from making such hypercalls ?
> It would have to be enabled on a per-process basis by the guest
> kernel, presumably during context switch.

And only user process on dom0 can do this.


>  -- Keir

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