tree: https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/snapshot/v5.15 head: ce3629841262f725a5f3a327403fcaf0e604a85e commit: 2f98d2f8d6ffedf8a76bc37dd864aa41cff0c9ea [132/139] untested: iommu/arm-smmu-v3: Add mpam helpers to query and set state config: arm64-defconfig (attached as .config) compiler: aarch64-linux-gcc (GCC) 11.2.0 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://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git/commit/?i... git remote add morse https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git git fetch --no-tags morse mpam/snapshot/v5.15 git checkout 2f98d2f8d6ffedf8a76bc37dd864aa41cff0c9ea # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 2835 | int arm_smmu_group_set_mpam(struct iommu_group *group, u16 partid, u8 pmg) | ^~~~~~~~~~~~~~~~~~~~~~~ 2886 | int arm_smmu_group_get_mpam(struct iommu_group *group, u16 *partid, u8 *pmg) | ^~~~~~~~~~~~~~~~~~~~~~~ vim +/arm_smmu_group_set_mpam +2835 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c 2834 2836 { 2837 int i; 2838 u32 sid; 2839 __le64 *step; 2840 unsigned long flags; 2841 struct iommu_domain *domain; 2842 struct arm_smmu_device *smmu; 2843 struct arm_smmu_master *master; 2844 struct arm_smmu_cmdq_batch cmds; 2845 struct arm_smmu_domain *smmu_domain; 2846 struct arm_smmu_cmdq_ent cmd = { 2847 .opcode = CMDQ_OP_CFGI_STE, 2848 .cfgi = { 2849 .leaf = true, 2850 }, 2851 }; 2852 2853 domain = iommu_get_domain_for_group(group); 2854 if (!domain || domain->ops != &arm_smmu_ops) 2855 return -EINVAL; 2856 2857 smmu_domain = to_smmu_domain(domain); 2858 if (!(smmu_domain->smmu->features & ARM_SMMU_FEAT_MPAM)) 2859 return -EIO; 2860 smmu = smmu_domain->smmu; 2861 2862 spin_lock_irqsave(&smmu_domain->devices_lock, flags); 2863 list_for_each_entry(master, &smmu_domain->devices, domain_head) { 2864 for (i = 0; i < master->num_streams; i++) { 2865 sid = master->streams[i].id; 2866 step = arm_smmu_get_step_for_sid(smmu, sid); 2867 2868 /* These need locking if the VMSPtr is ever used */ 2869 step[4] = FIELD_PREP(STRTAB_STE_4_PARTID, partid); 2870 step[5] = FIELD_PREP(STRTAB_STE_5_PMG, pmg); 2871 2872 cmd.cfgi.sid = sid; 2873 arm_smmu_cmdq_batch_add(smmu, &cmds, &cmd); 2874 } 2875 2876 master->partid = partid; 2877 master->pmg = pmg; 2878 } 2879 spin_unlock_irqrestore(&smmu_domain->devices_lock, flags); 2880 2881 arm_smmu_cmdq_batch_submit(smmu, &cmds); 2882 2883 return 0; 2884 } 2885 2887 { 2888 int err = -EINVAL; 2889 unsigned long flags; 2890 struct iommu_domain *domain; 2891 struct arm_smmu_master *master; 2892 struct arm_smmu_domain *smmu_domain; 2893 2894 domain = iommu_get_domain_for_group(group); 2895 if (!domain || domain->ops != &arm_smmu_ops) 2896 return -EINVAL; 2897 2898 smmu_domain = to_smmu_domain(domain); 2899 if (!(smmu_domain->smmu->features & ARM_SMMU_FEAT_MPAM)) 2900 return -EIO; 2901 2902 if (!partid && !pmg) 2903 return 0; 2904 2905 spin_lock_irqsave(&smmu_domain->devices_lock, flags); 2906 master = list_first_entry_or_null(&smmu_domain->devices, 2907 typeof(*master), domain_head); 2908 if (master) { 2909 if (partid) 2910 *partid = master->partid; 2911 if (pmg) 2912 *pmg = master->pmg; 2913 err = 0; 2914 } 2915 spin_unlock_irqrestore(&smmu_domain->devices_lock, flags); 2916 2917 return err; 2918 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org