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Groups > linux.kernel > #1272555
| From | Borislav Petkov <bp@suse.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests |
| Date | 2015-11-18 21:50 +0100 |
| Message-ID | <qwhPY-84P-7@gated-at.bofh.it> (permalink) |
| References | <qwhdg-7Lc-9@gated-at.bofh.it> <qwhdg-7Lc-29@gated-at.bofh.it> <qwhwC-7V2-33@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Wed, Nov 18, 2015 at 12:21:56PM -0800, Andy Lutomirski wrote:
> > diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
> > index e4f8010..0e4fe5b 100644
> > --- a/arch/x86/include/asm/cpufeature.h
> > +++ b/arch/x86/include/asm/cpufeature.h
> > @@ -216,6 +216,7 @@
> > #define X86_FEATURE_PAUSEFILTER ( 8*32+13) /* AMD filtered pause intercept */
> > #define X86_FEATURE_PFTHRESHOLD ( 8*32+14) /* AMD pause filter threshold */
> > #define X86_FEATURE_VMMCALL ( 8*32+15) /* Prefer vmmcall to vmcall */
> > +#define X86_FEATURE_XENPV ( 8*32+16) /* Xen paravirtual guest */
> >
>
> This bit is highly magical and I think we need Borislav's ack.
Yeah, that should be
#define X86_FEATURE_XENPV ( 8*32+16) /* "" Xen paravirtual guest */
^^
note the empty "". This prevents it from appearing in /proc/cpuinfo.
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
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[PATCH 0/3] Fix and cleanup for 32-bit PV sysexit Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2015-11-18 21:10 +0100
[PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2015-11-18 21:10 +0100
Re: [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Andy Lutomirski <luto@amacapital.net> - 2015-11-18 21:30 +0100
Re: [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Borislav Petkov <bp@suse.de> - 2015-11-18 21:50 +0100
Re: [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Brian Gerst <brgerst@gmail.com> - 2015-11-18 22:00 +0100
Re: [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Andy Lutomirski <luto@amacapital.net> - 2015-11-18 22:00 +0100
Re: [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2015-11-18 23:10 +0100
Re: [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Borislav Petkov <bp@suse.de> - 2015-11-19 13:10 +0100
Re: [PATCH 0/3] Fix and cleanup for 32-bit PV sysexit Borislav Petkov <bp@suse.de> - 2015-11-19 13:20 +0100
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