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

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
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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.

--Anthony

> 
>  -- Keir

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