According to section "Nested Paging and VMRUN/#VMEXIT" in APM vol 2, the following guest state is illegal: "Any MBZ bit of nCR3 is set" [PATCH 1/2] KVM: nSVM: Test MBZ bits in nested CR3 (nCR3) [PATCH kvm-unit-tests 2/2] nSVM: Test MBZ bits in nested CR3 (nCR3) arch/x86/include/asm/svm.h | 3 +++ arch/x86/kvm/svm/nested.c | 3 ++- 2 files changed, 5 insertions(+), 1 deletion(-) Krish Sadhukhan (1): nSVM: Test MBZ bits in nested CR3 (nCR3) x86/svm_tests.c | 41 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 40 insertions(+), 1 deletion(-) Krish Sadhukhan (1): nSVM: Test MBZ bits in nested CR3 (nCR3)