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Re: [PATCH] x86-64: invalidate sysenter
- From: "H. J. Lu" <hjl at lucon dot org>
- To: Jan Beulich <JBeulich at novell dot com>
- Cc: binutils at sources dot redhat dot com
- Date: Fri, 6 May 2005 09:07:31 -0700
- Subject: Re: [PATCH] x86-64: invalidate sysenter
- References: <s27ba3cd.063@emea1-mh.id2.novell.com>
On Fri, May 06, 2005 at 06:05:53PM +0200, Jan Beulich wrote:
> >>> "H. J. Lu" <hjl@lucon.org> 06.05.05 16:56:12 >>>
> >On Fri, May 06, 2005 at 06:35:50AM -0700, H. J. Lu wrote:
> >> On Fri, May 06, 2005 at 02:04:43PM +0200, Jan Beulich wrote:
> >> > sysenter not being supported in 64-bit mode was overlooked in the previous
> >> > cleanup rounds...
> >> >
> >>
> >> I will doublc check if sysenter is supported on EM64T.
> >>
> >
> >sysenter is supported on EM64T. Don't apply it.
>
> It can't (in 64-bit more) because it doesn't add new MSRs to support that...
>
It is documented in EM64T manual. Are you saying the manual is
wrong?
H.J.