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Re: [Xen-devel] RE: general protection fault: 0000 [#1]
| To: | Jan Beulich <jbeulich@xxxxxxxxxx>, Jose Renato G Santos <joserenato.santos@xxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] RE: general protection fault: 0000 [#1] |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Thu, 06 Mar 2008 09:31:04 +0000 |
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| Delivery-date: | Thu, 06 Mar 2008 01:32:12 -0800 |
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| Thread-topic: | [Xen-devel] RE: general protection fault: 0000 [#1] |
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The current let-anyone-RDMSR is pretty dodgy, to be honest. I think we should whitelist with a default of returning 0 for the contents (rather than #GP, which would be a bit harsh response for a PV kernel). -- Keir On 6/3/08 08:42, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: > Actually, it's not exactly that way - as long as an MSR can be read by > Xen (i.e. is implemented), guests are permitted to read them (see the > default case in the rdmsr handling part of emulate_privileged_op(). > > However, I have a hard time understanding what need profiling code > would have to access MSR 0x119 (which, according to my docs, is > PentiumPro/II/III specific). _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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