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

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.
(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...


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