CR4_VMXE
cr4 = gpr | CR4_VMXE;
(state->crs[NVMM_X64_CR_CR4] & CR4_VALID) | CR4_VMXE);
state->crs[NVMM_X64_CR_CR4] &= ~CR4_VMXE;
ret = vmx_check_cr(rcr4() | CR4_VMXE, vmx_cr4_fixed0, vmx_cr4_fixed1);
cr4 |= CR4_VMXE;
cr4 &= ~CR4_VMXE;