tree: https://github.com/meghadey/crypto iommu_debugfs_improvements head: 54d8336f22d5d2c374d54ed5db5e38da5e350370 commit: 54d8336f22d5d2c374d54ed5db5e38da5e350370 [2/2] iommu/vt-d: Populate debugfs if either dma or interrupt remapping is enabled config: i386-randconfig-c003-20200228 (attached as .config) compiler: gcc-7 (Debian 7.5.0-5) 7.5.0 reproduce: git checkout 54d8336f22d5d2c374d54ed5db5e38da5e350370 # save the attached .config to linux build tree make ARCH=i386 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from include/linux/init.h:5:0, from drivers//iommu/intel-iommu.c:16: drivers//iommu/intel-iommu.c: In function 'intel_iommu_init': drivers//iommu/intel-iommu.c:5137:21: error: 'disable_irq_remap' undeclared (first use in this function); did you mean 'disable_irq_wake'? if (!no_iommu && (!disable_irq_remap || !dmar_disabled)) ^ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ if (!no_iommu && (!disable_irq_remap || !dmar_disabled)) ^~ drivers//iommu/intel-iommu.c:5137:21: note: each undeclared identifier is reported only once for each function it appears in if (!no_iommu && (!disable_irq_remap || !dmar_disabled)) ^ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ if (!no_iommu && (!disable_irq_remap || !dmar_disabled)) ^~ vim +/if +5137 drivers//iommu/intel-iommu.c 5091 5092 int __init intel_iommu_init(void) 5093 { 5094 int ret = -ENODEV; 5095 struct dmar_drhd_unit *drhd; 5096 struct intel_iommu *iommu; 5097 5098 /* 5099 * Intel IOMMU is required for a TXT/tboot launch or platform 5100 * opt in, so enforce that. 5101 */ 5102 force_on = tboot_force_iommu() || platform_optin_force_iommu(); 5103 5104 if (iommu_init_mempool()) { 5105 if (force_on) 5106 panic("tboot: Failed to initialize iommu memory\n"); 5107 return -ENOMEM; 5108 } 5109 5110 down_write(&dmar_global_lock); 5111 if (dmar_table_init()) { 5112 if (force_on) 5113 panic("tboot: Failed to initialize DMAR table\n"); 5114 goto out_free_dmar; 5115 } 5116 5117 if (dmar_dev_scope_init() < 0) { 5118 if (force_on) 5119 panic("tboot: Failed to initialize DMAR device scope\n"); 5120 goto out_free_dmar; 5121 } 5122 5123 up_write(&dmar_global_lock); 5124 5125 /* 5126 * The bus notifier takes the dmar_global_lock, so lockdep will 5127 * complain later when we register it under the lock. 5128 */ 5129 dmar_register_bus_notifier(); 5130 5131 down_write(&dmar_global_lock); 5132 5133 /* 5134 * Create iommu debugfs directory if iommu is present and either DMA 5135 * or IRQ remapping is enabled. 5136 */ 5138 intel_iommu_debugfs_init(); 5139 5140 if (no_iommu || dmar_disabled) { 5141 /* 5142 * We exit the function here to ensure IOMMU's remapping and 5143 * mempool aren't setup, which means that the IOMMU's PMRs 5144 * won't be disabled via the call to init_dmars(). So disable 5145 * it explicitly here. The PMRs were setup by tboot prior to 5146 * calling SENTER, but the kernel is expected to reset/tear 5147 * down the PMRs. 5148 */ 5149 if (intel_iommu_tboot_noforce) { 5150 for_each_iommu(iommu, drhd) 5151 iommu_disable_protect_mem_regions(iommu); 5152 } 5153 5154 /* 5155 * Make sure the IOMMUs are switched off, even when we 5156 * boot into a kexec kernel and the previous kernel left 5157 * them enabled 5158 */ 5159 intel_disable_iommus(); 5160 goto out_free_dmar; 5161 } 5162 5163 if (list_empty(&dmar_rmrr_units)) 5164 pr_info("No RMRR found\n"); 5165 5166 if (list_empty(&dmar_atsr_units)) 5167 pr_info("No ATSR found\n"); 5168 5169 if (dmar_init_reserved_ranges()) { 5170 if (force_on) 5171 panic("tboot: Failed to reserve iommu ranges\n"); 5172 goto out_free_reserved_range; 5173 } 5174 5175 if (dmar_map_gfx) 5176 intel_iommu_gfx_mapped = 1; 5177 5178 init_no_remapping_devices(); 5179 5180 ret = init_dmars(); 5181 if (ret) { 5182 if (force_on) 5183 panic("tboot: Failed to initialize DMARs\n"); 5184 pr_err("Initialization failed\n"); 5185 goto out_free_reserved_range; 5186 } 5187 up_write(&dmar_global_lock); 5188 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org