From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A417F138C for ; Fri, 12 Aug 2022 14:54:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1660316090; x=1691852090; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=omkE3NQsYWGVI5ohyEwid1FFrhnD+QvscZYysRHXkes=; b=KW9ox1H7xyToi61IZpGfWJfc4QXLBxZAMSsIbJq9TMH0IFJ8cuall/Af 0FMW0WdNQC8dLaPOrMi/uqnJTc8GGBy0oERhhccsBI6xZ3orUTvVm2WAs 5Rn0UIHR+b915Ze9AlzkaBGBdssuEeZRd/ETc31tebeUxxcLOl7ierGCo XKMRdFlj5xYjzvEHvAIfR3F/ToDoxHbV6T5fnX9VPKmkWEIlJiYS8pZsE TnXC5EwK7ybW3uIx4a3Qt2ojmjILEwAoNqnT5lzsQ481EL07uEEta3nbe Upmg1lKECog7x/YEUSdERGyq1bX7RDh3m+fhOa7VwfOaS0aVDmM8leQ8y w==; X-IronPort-AV: E=McAfee;i="6400,9594,10437"; a="292402704" X-IronPort-AV: E=Sophos;i="5.93,233,1654585200"; d="scan'208";a="292402704" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Aug 2022 07:54:50 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.93,233,1654585200"; d="scan'208";a="605935187" Received: from lkp-server02.sh.intel.com (HELO 8745164cafc7) ([10.239.97.151]) by orsmga002.jf.intel.com with ESMTP; 12 Aug 2022 07:54:46 -0700 Received: from kbuild by 8745164cafc7 with local (Exim 4.96) (envelope-from ) id 1oMW3i-0000ed-08; Fri, 12 Aug 2022 14:54:46 +0000 Date: Fri, 12 Aug 2022 22:54:07 +0800 From: kernel test robot To: Yuan Yao , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, Paolo Bonzini , Sean Christopherson , Jim Mattson , Jon Cargille , Peter Shier , Oliver Upton , Yuan Yao Subject: Re: [PATCH 1/1] kvm: nVMX: Checks "VMCS shadowing" with VMCS link pointer for non-root mode VM{READ,WRITE} Message-ID: <202208122237.cw837245-lkp@intel.com> References: <20220812014706.43409-1-yuan.yao@intel.com> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220812014706.43409-1-yuan.yao@intel.com> 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: i386-randconfig-a011 (https://download.01.org/0day-ci/archive/20220812/202208122237.cw837245-lkp@intel.com/config) compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 5f1c7e2cc5a3c07cbc2412e851a7283c1841f520) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # 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 COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash arch/x86/kvm/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot All errors (new ones prefixed by >>): >> arch/x86/kvm/vmx/nested.c:5126:35: error: incompatible pointer types passing 'struct kvm_vcpu *' to parameter of type 'struct vmcs12 *' [-Werror,-Wincompatible-pointer-types] nested_cpu_has_shadow_vmcs(vcpu) && ^~~~ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ arch/x86/kvm/vmx/nested.h:215:62: note: passing argument to parameter 'vmcs12' here static inline bool nested_cpu_has_shadow_vmcs(struct vmcs12 *vmcs12) ^ >> arch/x86/kvm/vmx/nested.c:5126:35: error: incompatible pointer types passing 'struct kvm_vcpu *' to parameter of type 'struct vmcs12 *' [-Werror,-Wincompatible-pointer-types] nested_cpu_has_shadow_vmcs(vcpu) && ^~~~ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:61: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ arch/x86/kvm/vmx/nested.h:215:62: note: passing argument to parameter 'vmcs12' here static inline bool nested_cpu_has_shadow_vmcs(struct vmcs12 *vmcs12) ^ >> arch/x86/kvm/vmx/nested.c:5126:35: error: incompatible pointer types passing 'struct kvm_vcpu *' to parameter of type 'struct vmcs12 *' [-Werror,-Wincompatible-pointer-types] nested_cpu_has_shadow_vmcs(vcpu) && ^~~~ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value' (cond) ? \ ^~~~ arch/x86/kvm/vmx/nested.h:215:62: note: passing argument to parameter 'vmcs12' here static inline bool nested_cpu_has_shadow_vmcs(struct vmcs12 *vmcs12) ^ arch/x86/kvm/vmx/nested.c:5237:34: error: incompatible pointer types passing 'struct kvm_vcpu *' to parameter of type 'struct vmcs12 *' [-Werror,-Wincompatible-pointer-types] nested_cpu_has_shadow_vmcs(vcpu) && ^~~~ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ arch/x86/kvm/vmx/nested.h:215:62: note: passing argument to parameter 'vmcs12' here static inline bool nested_cpu_has_shadow_vmcs(struct vmcs12 *vmcs12) ^ arch/x86/kvm/vmx/nested.c:5237:34: error: incompatible pointer types passing 'struct kvm_vcpu *' to parameter of type 'struct vmcs12 *' [-Werror,-Wincompatible-pointer-types] nested_cpu_has_shadow_vmcs(vcpu) && ^~~~ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:61: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ arch/x86/kvm/vmx/nested.h:215:62: note: passing argument to parameter 'vmcs12' here static inline bool nested_cpu_has_shadow_vmcs(struct vmcs12 *vmcs12) ^ arch/x86/kvm/vmx/nested.c:5237:34: error: incompatible pointer types passing 'struct kvm_vcpu *' to parameter of type 'struct vmcs12 *' [-Werror,-Wincompatible-pointer-types] nested_cpu_has_shadow_vmcs(vcpu) && ^~~~ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value' (cond) ? \ ^~~~ arch/x86/kvm/vmx/nested.h:215:62: note: passing argument to parameter 'vmcs12' here static inline bool nested_cpu_has_shadow_vmcs(struct vmcs12 *vmcs12) ^ 6 errors generated. vim +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