Nitin A Kamble wrote: > Avi, > > A new VMX feature "Unrestricted Guest" feature is added in the VMX > specification. You can look at the latest Intel processor manual for > details of the feature here: > > http://www.intel.com/products/processor/manuals > > It allows kvm guests to run real mode and unpaged mode > code natively in the VMX mode when EPT is turned on. With the > unrestricted guest there is no need to emulate the guest real mode code > in the vm86 container or in the emulator. Also the guest big real mode > code works like native. > > The attached patch enhances KVM to use the unrestricted guest feature > if available on the processor. It also adds a new kernel/module > parameter to disable the unrestricted guest feature at the boot time. > > Signed-Off-By: Nitin A Kamble <nitin.a.kam...@intel.com> > > Thanks & Regards, > Nitin >
It may make sense to expose this as a CAP down to userspace. We could possibly make better error messages in userspace when we get an unknown vmexit failure on pre-wsm hardware. Regards, Anthony Liguori -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
