Re: [Xen-devel] [PATCH v14 00/20] Introduce PVH domU support

[George Dunlap <george.dunlap@xxxxxxxxxxxxx>]

On 04/11/13 17:34, Tim Deegan wrote:
> At 17:23 +0000 on 04 Nov (1383582187), George Dunlap wrote:
> > On 04/11/13 16:59, Konrad Rzeszutek Wilk wrote:
> > > > This also means no support for "legacy" forced invalid ops -- only native
> > > > cpuid is supported in this series.
> > > OK.
> > (FWIW, support for legacy forced invalid ops was requested by Tim.)
> I was worried about existing PV kernel code that used the fake-CPUID,
> which would break if the 'core' kernel code went from PV to PVH.  But
> I guess I could be convinced that such kernel code is buggy?  Really,
> the high-order bit was consistency.  The version I commented on
> supported them for user-space but not for kernel, which seemed like
> risking trouble for no benefit.
Oh right -- I think Mukesh we do need to support forced invalid ops for 
user space so that we can use the same xen tools binaries on PV and PVH 
kernels.
Hmm, Mukesh / Konrad, what tools are you actually thinking about here?  
Are these Oracle-specific tools?  I can't seem to find XEN_CPUID or 
XEN_EMULATE_PREFIX anywhere in the tools/ directory of the xen repo...
 -George

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