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Re: [Xen-devel] [PATCH] Hypercalls from HVM guests
| To: | Steve Ofsthun <sofsthun@xxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] Hypercalls from HVM guests |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Sat, 22 Apr 2006 09:49:53 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Sat, 22 Apr 2006 01:53:48 -0700 |
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| In-reply-to: | <444920C7.2070705@xxxxxxxxxxxxxxx> |
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On 21 Apr 2006, at 19:13, Steve Ofsthun wrote: With these changes you can make raw hypercalls from HVM guests. You probably want a separate hypercall table from that of paravirtualized guests, for several reasons: 1. Some hypercalls will not be HVM aware and are probably unsafe to run from an HVM context 2. Some hypercalls may want different implementations (or at least a wrapper) on HVM 3. On 64-bit, you may even want a separate 32-bit hypercall table containing wrappers that interface between 32-bit callers and the core 64-bit hypercall functions. (1) is most important right now -- we should only permit the hypercalls we need, and audit any others before they are added to the list. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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