Hi Xingang, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 5a399b91821faeec2466751db2d714b24f8eb17c commit: 7c01a111ee8606b0c1986bb624808769d4236742 [1942/1942] iommu/arm-smmu-v3: Add support to configure mpam in STE/CD context config: arm64-randconfig-002-20251213 (https://download.01.org/0day-ci/archive/20251214/202512140721.kLxdCMUB-lkp@i...) compiler: aarch64-linux-gcc (GCC) 11.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251214/202512140721.kLxdCMUB-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512140721.kLxdCMUB-lkp@intel.com/ All warnings (new ones prefixed by >>):

...

drivers/iommu/arm-smmu-v3-context.c:569:5: warning: no previous prototype for 'arm_smmu_set_cd_mpam' [-Wmissing-prototypes] 569 | int arm_smmu_set_cd_mpam(struct iommu_pasid_table_ops *ops, | ^~~~~~~~~~~~~~~~~~~~ -- drivers/iommu/arm-smmu-v3.c:4267:5: warning: no previous prototype for 'arm_smmu_set_dev_mpam' [-Wmissing-prototypes] 4267 | int arm_smmu_set_dev_mpam(struct device *dev, int ssid, int partid, int pmg, | ^~~~~~~~~~~~~~~~~~~~~ drivers/iommu/arm-smmu-v3.c:4269: warning: Function parameter or member 'dev' not described in 'arm_smmu_set_dev_mpam' drivers/iommu/arm-smmu-v3.c:4269: warning: Function parameter or member 'ssid' not described in 'arm_smmu_set_dev_mpam' drivers/iommu/arm-smmu-v3.c:4269: warning: Function parameter or member 'partid' not described in 'arm_smmu_set_dev_mpam' drivers/iommu/arm-smmu-v3.c:4269: warning: Function parameter or member 'pmg' not described in 'arm_smmu_set_dev_mpam' drivers/iommu/arm-smmu-v3.c:4269: warning: Function parameter or member 's1mpam' not described in 'arm_smmu_set_dev_mpam'

vim +/arm_smmu_set_cd_mpam +569 drivers/iommu/arm-smmu-v3-context.c 568

569 int arm_smmu_set_cd_mpam(struct iommu_pasid_table_ops *ops, 570 int ssid, int partid, int pmg) 571 { 572 struct arm_smmu_cd_tables *tbl = pasid_ops_to_tables(ops); 573 u64 val; 574 __le64 *cdptr = arm_smmu_get_cd_ptr(tbl, ssid); 575 576 if (!cdptr) 577 return -ENOMEM; 578 579 val = le64_to_cpu(cdptr[5]); 580 val &= ~CTXDESC_CD_5_PARTID_MASK; 581 val |= FIELD_PREP(CTXDESC_CD_5_PARTID_MASK, partid); 582 val &= ~CTXDESC_CD_5_PMG_MASK; 583 val |= FIELD_PREP(CTXDESC_CD_5_PMG_MASK, pmg); 584 WRITE_ONCE(cdptr[5], cpu_to_le64(val)); 585 586 iommu_pasid_flush(&tbl->pasid, ssid, true); 587 588 return 0; 589 } 590

-- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki