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xen-devel
RE: [Xen-devel] [Patch] Enable SMEP CPU feature support for XEN itself
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To: |
Keir Fraser <keir.xen@xxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxxxx>, "Yang, Wei Y" <wei.y.yang@xxxxxxxxx> |
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Subject: |
RE: [Xen-devel] [Patch] Enable SMEP CPU feature support for XEN itself |
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From: |
"Li, Xin" <xin.li@xxxxxxxxx> |
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Date: |
Fri, 3 Jun 2011 06:49:55 +0800 |
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[Xen-devel] [Patch] Enable SMEP CPU feature support for XEN itself |
> >> } 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.
Yeah, and we can't do leaf 7.0 detect in generic_identify. Or will again set
SMEP in capabilities, but it should be ok.
Thanks!
-Xin
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