Hi Yuan, Thank you for the patch! Yet something to improve: [auto build test ERROR on kvm/queue] [also build test ERROR on mst-vhost/linux-next linus/master v5.19 next-20220812] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Yuan-Yao/kvm-nVMX-Checks-VMCS-shadowing-with-VMCS-link-pointer-for-non-root-mode-VM-READ-WRITE/20220812-095001 base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue config: x86_64-randconfig-a015 (https://download.01.org/0day-ci/archive/20220812/202208122325.Mf2ownsy-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-3) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/b15f3d4cd8e8f9cf2db64711234ca27ac74142b2 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Yuan-Yao/kvm-nVMX-Checks-VMCS-shadowing-with-VMCS-link-pointer-for-non-root-mode-VM-READ-WRITE/20220812-095001 git checkout b15f3d4cd8e8f9cf2db64711234ca27ac74142b2 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): arch/x86/kvm/vmx/nested.c: In function 'handle_vmread': >> arch/x86/kvm/vmx/nested.c:5126:49: error: passing argument 1 of 'nested_cpu_has_shadow_vmcs' from incompatible pointer type [-Werror=incompatible-pointer-types] 5126 | nested_cpu_has_shadow_vmcs(vcpu) && | ^~~~ | | | struct kvm_vcpu * In file included from arch/x86/kvm/vmx/nested.c:13: arch/x86/kvm/vmx/nested.h:215:62: note: expected 'struct vmcs12 *' but argument is of type 'struct kvm_vcpu *' 215 | static inline bool nested_cpu_has_shadow_vmcs(struct vmcs12 *vmcs12) | ~~~~~~~~~~~~~~~^~~~~~ arch/x86/kvm/vmx/nested.c: In function 'handle_vmwrite': arch/x86/kvm/vmx/nested.c:5237:41: error: passing argument 1 of 'nested_cpu_has_shadow_vmcs' from incompatible pointer type [-Werror=incompatible-pointer-types] 5237 | nested_cpu_has_shadow_vmcs(vcpu) && | ^~~~ | | | struct kvm_vcpu * In file included from arch/x86/kvm/vmx/nested.c:13: arch/x86/kvm/vmx/nested.h:215:62: note: expected 'struct vmcs12 *' but argument is of type 'struct kvm_vcpu *' 215 | static inline bool nested_cpu_has_shadow_vmcs(struct vmcs12 *vmcs12) | ~~~~~~~~~~~~~~~^~~~~~ cc1: some warnings being treated as errors vim +/nested_cpu_has_shadow_vmcs +5126 arch/x86/kvm/vmx/nested.c 5098 5099 static int handle_vmread(struct kvm_vcpu *vcpu) 5100 { 5101 struct vmcs12 *vmcs12 = is_guest_mode(vcpu) ? get_shadow_vmcs12(vcpu) 5102 : get_vmcs12(vcpu); 5103 unsigned long exit_qualification = vmx_get_exit_qual(vcpu); 5104 u32 instr_info = vmcs_read32(VMX_INSTRUCTION_INFO); 5105 struct vcpu_vmx *vmx = to_vmx(vcpu); 5106 struct x86_exception e; 5107 unsigned long field; 5108 u64 value; 5109 gva_t gva = 0; 5110 short offset; 5111 int len, r; 5112 5113 if (!nested_vmx_check_permission(vcpu)) 5114 return 1; 5115 5116 /* Decode instruction info and find the field to read */ 5117 field = kvm_register_read(vcpu, (((instr_info) >> 28) & 0xf)); 5118 5119 if (!evmptr_is_valid(vmx->nested.hv_evmcs_vmptr)) { 5120 /* 5121 * In VMX non-root operation, when the VMCS-link pointer is INVALID_GPA, 5122 * any VMREAD sets the ALU flags for VMfailInvalid. 5123 */ 5124 if (vmx->nested.current_vmptr == INVALID_GPA || 5125 (is_guest_mode(vcpu) && > 5126 nested_cpu_has_shadow_vmcs(vcpu) && 5127 get_vmcs12(vcpu)->vmcs_link_pointer == INVALID_GPA)) 5128 return nested_vmx_failInvalid(vcpu); 5129 5130 offset = get_vmcs12_field_offset(field); 5131 if (offset < 0) 5132 return nested_vmx_fail(vcpu, VMXERR_UNSUPPORTED_VMCS_COMPONENT); 5133 5134 if (!is_guest_mode(vcpu) && is_vmcs12_ext_field(field)) 5135 copy_vmcs02_to_vmcs12_rare(vcpu, vmcs12); 5136 5137 /* Read the field, zero-extended to a u64 value */ 5138 value = vmcs12_read_any(vmcs12, field, offset); 5139 } else { 5140 /* 5141 * Hyper-V TLFS (as of 6.0b) explicitly states, that while an 5142 * enlightened VMCS is active VMREAD/VMWRITE instructions are 5143 * unsupported. Unfortunately, certain versions of Windows 11 5144 * don't comply with this requirement which is not enforced in 5145 * genuine Hyper-V. Allow VMREAD from an enlightened VMCS as a 5146 * workaround, as misbehaving guests will panic on VM-Fail. 5147 * Note, enlightened VMCS is incompatible with shadow VMCS so 5148 * all VMREADs from L2 should go to L1. 5149 */ 5150 if (WARN_ON_ONCE(is_guest_mode(vcpu))) 5151 return nested_vmx_failInvalid(vcpu); 5152 5153 offset = evmcs_field_offset(field, NULL); 5154 if (offset < 0) 5155 return nested_vmx_fail(vcpu, VMXERR_UNSUPPORTED_VMCS_COMPONENT); 5156 5157 /* Read the field, zero-extended to a u64 value */ 5158 value = evmcs_read_any(vmx->nested.hv_evmcs, field, offset); 5159 } 5160 5161 /* 5162 * Now copy part of this value to register or memory, as requested. 5163 * Note that the number of bits actually copied is 32 or 64 depending 5164 * on the guest's mode (32 or 64 bit), not on the given field's length. 5165 */ 5166 if (instr_info & BIT(10)) { 5167 kvm_register_write(vcpu, (((instr_info) >> 3) & 0xf), value); 5168 } else { 5169 len = is_64_bit_mode(vcpu) ? 8 : 4; 5170 if (get_vmx_mem_address(vcpu, exit_qualification, 5171 instr_info, true, len, &gva)) 5172 return 1; 5173 /* _system ok, nested_vmx_check_permission has verified cpl=0 */ 5174 r = kvm_write_guest_virt_system(vcpu, gva, &value, len, &e); 5175 if (r != X86EMUL_CONTINUE) 5176 return kvm_handle_memory_failure(vcpu, r, &e); 5177 } 5178 5179 return nested_vmx_succeed(vcpu); 5180 } 5181 -- 0-DAY CI Kernel Test Service https://01.org/lkp
