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Re: [Xen-devel] [Patch] Enable SMEP CPU feature support for XEN itself
| To: | "Li, Xin" <xin.li@xxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxxxx>, "Yang, Wei Y" <wei.y.yang@xxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [Patch] Enable SMEP CPU feature support for XEN itself |
| From: | Keir Fraser <keir.xen@xxxxxxxxx> |
| Date: | Thu, 02 Jun 2011 20:24:24 +0100 |
| Cc: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Thu, 02 Jun 2011 12:25:06 -0700 |
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| Thread-topic: | [Xen-devel] [Patch] Enable SMEP CPU feature support for XEN itself |
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On 02/06/2011 15:36, "Li, Xin" <xin.li@xxxxxxxxx> wrote: >> } else >>> setup_clear_cpu_cap(X86_FEATURE_SMEP); > > This needs to be done on APs too. Thus I think we still need define > setup_smep as __cpuinit. The whole point of setup_clear_cpu_cap() is that it only needs to run on the BP and the change gets picked up by every AP automatically as it boots. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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