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Re: [Xen-devel] [Q] Allow rdpmc access from DOM-0
| To: | "Mohapatra, Hemant" <Hemant.Mohapatra@xxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [Q] Allow rdpmc access from DOM-0 |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Thu, 06 Sep 2007 15:59:10 +0100 |
| Delivery-date: | Thu, 06 Sep 2007 07:59:58 -0700 |
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| Thread-topic: | [Xen-devel] [Q] Allow rdpmc access from DOM-0 |
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On 6/9/07 14:44, "Mohapatra, Hemant" <Hemant.Mohapatra@xxxxxxx> wrote: > I boot into the new kernel but am still unable to trap rdpmc > instructions from DOM0. Is there any step I am missing in my attempt to > trap+emulate rdpmc? RDPMC is not much use unless you can also set up the performance-counting MSRs in advance to count appropriate things. Since we do not virtualise these MSRs, providing access to RDPMC is pointless. You should look at xenoprof for example usage of performance counter infrastructure in Xen. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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