Am 03.03.2010 um 20:15 schrieb Joerg Roedel <joerg.roedel@xxxxxxx>:
This patch adds code to ask the kernel about the svm features it supports for its guests and propagates them to the guest. The new capability is necessary because the old behavior of the kernel was to just return the host svm features but every svm-feature needs emulation in the nested svm kernel code. The new capability indicates that the kernel is aware of that when returning svm cpuid information.
Do we really need that complexity? By default the kernel masks out unsupported cpuid features anyway. So if we don't have npt guest support (enabled), the kernel module should just mask it out.
IOW, always passing npt should work. No capability should make it get masked out.
Alex
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