Jim Mattson <jmattson@xxxxxxxxxx> writes: > Isn't McAfee DeepSAFE defunct? Are there any other consumers of EPTP switching? I don't know of any real users but I think we should be providing this functionality to the L1 hypervisor :) IIRC, Xen lets you use EPTP switching as part of VM introspection ? Bandan > On Thu, Jun 29, 2017 at 4:29 PM, Bandan Das <bsd@xxxxxxxxxx> wrote: >> These patches expose eptp switching/vmfunc to the nested hypervisor. Testing with >> kvm-unit-tests seems to work ok. >> >> If the guest hypervisor enables vmfunc/eptp switching, a "shadow" eptp list >> address page is written to the VMCS. Initially, it would be unpopulated which >> would result in a vmexit with exit reason 59. This hooks to handle_vmfunc() >> to rewrite vmcs12->ept_pointer to reload the mmu and get a new root hpa. >> This new shadow ept pointer is written to the shadow eptp list in the given >> index. A next vmfunc call to switch to the given index would succeed without >> an exit. >> >> Bandan Das (2): >> KVM: nVMX: Implement EPTP switching for the L1 hypervisor >> KVM: nVMX: Advertise VMFUNC to L1 hypervisor >> >> arch/x86/include/asm/vmx.h | 9 ++++ >> arch/x86/kvm/vmx.c | 122 +++++++++++++++++++++++++++++++++++++++++++++ >> 2 files changed, 131 insertions(+) >> >> -- >> 2.9.4 >>
