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Re: [Xen-devel] [PATCH 03/11] x86/HVM: Hardware alternate p2m support detection.

At 13:26 -0800 on 09 Jan (1420806393), Ed White wrote:
> As implemented here, only supported on platforms with VMX HAP.

This patch, I think, is where we could have an off-by-default feature
option to disable all this new code until it's stable.

There must also be some way for the toolstack to find out whether a
given host supports altp2m, so that it can plan for VM migration, and
some way (in a later patch) to enable or disable the feature for a
given VM.  Typically we use a HVM_PARAM for that, with appropriate
checks on who can change it and when.



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