tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 8551213150db5f8eebd27273dae93f6fe258d63a commit: 72fe4978ee346c10869113410da1b61710dd8d8f [2658/2658] LoongArch: add iommu support config: loongarch-randconfig-2005-20250806 (https://download.01.org/0day-ci/archive/20250806/202508061815.FqJo5TwT-lkp@i...) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project faa4c4c2dc804c31845d8f036345fac00e016f2d) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250806/202508061815.FqJo5TwT-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/202508061815.FqJo5TwT-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from drivers/iommu/loongarch_iommu.c:20: In file included from include/linux/device.h:32: In file included from include/linux/device/driver.h:21: In file included from include/linux/module.h:19: In file included from include/linux/elf.h:6: In file included from arch/loongarch/include/asm/elf.h:13: In file included from arch/loongarch/include/asm/vdso.h:10: In file included from include/linux/mm.h:2247: include/linux/vmstat.h:508:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 508 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 509 | item]; | ~~~~ include/linux/vmstat.h:515:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 515 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 516 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ include/linux/vmstat.h:527:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 527 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 528 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~

...

drivers/iommu/loongarch_iommu.c:610:6: warning: no previous prototype for function 'domain_deattach_iommu' [-Wmissing-prototypes] 610 | void domain_deattach_iommu(struct dom_info *priv, struct iommu_info *info) | ^ drivers/iommu/loongarch_iommu.c:610:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 610 | void domain_deattach_iommu(struct dom_info *priv, struct iommu_info *info) | ^ | static drivers/iommu/loongarch_iommu.c:651:29: warning: no previous prototype for function 'lookup_rlooptable' [-Wmissing-prototypes] 651 | struct iommu_rlookup_entry *lookup_rlooptable(int pcisegment) | ^ drivers/iommu/loongarch_iommu.c:651:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 651 | struct iommu_rlookup_entry *lookup_rlooptable(int pcisegment) | ^ | static drivers/iommu/loongarch_iommu.c:662:25: warning: no previous prototype for function 'find_iommu_by_dev' [-Wmissing-prototypes] 662 | struct loongarch_iommu *find_iommu_by_dev(struct pci_dev *pdev) | ^ drivers/iommu/loongarch_iommu.c:662:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 662 | struct loongarch_iommu *find_iommu_by_dev(struct pci_dev *pdev) | ^ | static drivers/iommu/loongarch_iommu.c:684:22: warning: no previous prototype for function 'iommu_init_device' [-Wmissing-prototypes] 684 | struct iommu_device *iommu_init_device(struct device *dev) | ^ drivers/iommu/loongarch_iommu.c:684:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 684 | struct iommu_device *iommu_init_device(struct device *dev) | ^ | static drivers/iommu/loongarch_iommu.c:721:22: warning: no previous prototype for function 'la_iommu_probe_device' [-Wmissing-prototypes] 721 | struct iommu_device *la_iommu_probe_device(struct device *dev) | ^ drivers/iommu/loongarch_iommu.c:721:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 721 | struct iommu_device *la_iommu_probe_device(struct device *dev) | ^ | static drivers/iommu/loongarch_iommu.c:752:20: warning: no previous prototype for function 'get_iommu_info_from_dom' [-Wmissing-prototypes] 752 | struct iommu_info *get_iommu_info_from_dom(struct dom_info *priv, struct loongarch_iommu *iommu) | ^ drivers/iommu/loongarch_iommu.c:752:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 752 | struct iommu_info *get_iommu_info_from_dom(struct dom_info *priv, struct loongarch_iommu *iommu) | ^ | static drivers/iommu/loongarch_iommu.c:767:20: warning: no previous prototype for function 'domain_attach_iommu' [-Wmissing-prototypes] 767 | struct iommu_info *domain_attach_iommu(struct dom_info *priv, struct loongarch_iommu *iommu) | ^ drivers/iommu/loongarch_iommu.c:767:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 767 | struct iommu_info *domain_attach_iommu(struct dom_info *priv, struct loongarch_iommu *iommu) | ^ | static drivers/iommu/loongarch_iommu.c:1197:25: warning: no previous prototype for function 'loongarch_get_iommu_by_devid' [-Wmissing-prototypes] 1197 | struct loongarch_iommu *loongarch_get_iommu_by_devid(struct pci_dev *pdev) | ^ drivers/iommu/loongarch_iommu.c:1197:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 1197 | struct loongarch_iommu *loongarch_get_iommu_by_devid(struct pci_dev *pdev) | ^ | static drivers/iommu/loongarch_iommu.c:1215:6: warning: no previous prototype for function 'check_device_compat' [-Wmissing-prototypes] 1215 | bool check_device_compat(struct pci_dev *pdev) | ^ drivers/iommu/loongarch_iommu.c:1215:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 1215 | bool check_device_compat(struct pci_dev *pdev) | ^ | static drivers/iommu/loongarch_iommu.c:1344:29: warning: no previous prototype for function 'create_rlookup_entry' [-Wmissing-prototypes] 1344 | struct iommu_rlookup_entry *create_rlookup_entry(int pcisegment) | ^ drivers/iommu/loongarch_iommu.c:1344:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 1344 | struct iommu_rlookup_entry *create_rlookup_entry(int pcisegment) | ^ | static 14 warnings generated. -- drivers/iommu/loongarch_iommu.c:1663: warning: Function parameter or member 'ivrs' not described in 'get_highest_supported_ivhd_type'

vim +/domain_deattach_iommu +610 drivers/iommu/loongarch_iommu.c 609

610 void domain_deattach_iommu(struct dom_info *priv, struct iommu_info *info) 611 { 612 if ((priv == NULL) || (info == NULL) || 613 (info->dev_cnt != 0) || (info->iommu == NULL)) { 614 pr_err("%s invalid parameter", __func__); 615 return; 616 } 617 del_domain_from_list(info->iommu, priv); 618 domain_id_free(info->iommu, info->id); 619 spin_lock(&priv->lock); 620 list_del(&info->list); 621 spin_unlock(&priv->lock); 622 kfree(info); 623 } 624 625 static void la_iommu_domain_free(struct iommu_domain *domain) 626 { 627 struct dom_info *priv; 628 struct loongarch_iommu *iommu = NULL; 629 struct iommu_info *info, *tmp; 630 631 priv = to_dom_info(domain); 632 spin_lock(&priv->lock); 633 list_for_each_entry_safe(info, tmp, &priv->iommu_devlist, list) { 634 if (info->dev_cnt > 0) 635 detach_all_dev_by_domain(info); 636 iommu = info->iommu; 637 spin_unlock(&priv->lock); 638 domain_deattach_iommu(priv, info); 639 spin_lock(&priv->lock); 640 iommu_flush_iotlb(iommu); 641 if (!has_dom(iommu)) 642 iommu_translate_disable(iommu); 643 } 644 spin_unlock(&priv->lock); 645 mutex_lock(&priv->ptl_lock); 646 iommu_free_pagetable(priv); 647 mutex_unlock(&priv->ptl_lock); 648 dom_info_free(priv); 649 } 650 651 struct iommu_rlookup_entry *lookup_rlooptable(int pcisegment) 652 { 653 struct iommu_rlookup_entry *rlookupentry = NULL; 654 655 list_for_each_entry(rlookupentry, &la_rlookup_iommu_list, list) { 656 if (rlookupentry->pcisegment == pcisegment) 657 return rlookupentry; 658 } 659 return NULL; 660 } 661 662 struct loongarch_iommu *find_iommu_by_dev(struct pci_dev *pdev) 663 { 664 int pcisegment; 665 unsigned short devid; 666 struct iommu_rlookup_entry *rlookupentry = NULL; 667 struct loongarch_iommu *iommu = NULL; 668 struct pci_bus *bus = pdev->bus; 669 670 devid = PCI_DEVID(bus->number, pdev->devfn); 671 pcisegment = pci_domain_nr(bus); 672 rlookupentry = lookup_rlooptable(pcisegment); 673 if (rlookupentry == NULL) { 674 pr_info("%s find segment %d rlookupentry failed\n", __func__, 675 pcisegment); 676 return iommu; 677 } 678 iommu = rlookupentry->rlookup_table[devid]; 679 if (iommu && (!iommu->confbase)) 680 iommu = NULL; 681 return iommu; 682 } 683 684 struct iommu_device *iommu_init_device(struct device *dev) 685 { 686 struct la_iommu_dev_data *dev_data; 687 struct pci_dev *pdev = to_pci_dev(dev); 688 struct pci_bus *bus = pdev->bus; 689 unsigned short devid; 690 struct loongarch_iommu *iommu = NULL; 691 struct iommu_device *iommu_dev = ERR_PTR(-ENODEV); 692 693 if (!dev_is_pci(dev)) 694 return iommu_dev; 695 696 if (dev->archdata.iommu != NULL || bus == NULL) { 697 pr_info("LA-IOMMU: bdf:0x%x has added\n", pdev->devfn); 698 return iommu_dev; 699 } 700 iommu = find_iommu_by_dev(pdev); 701 if (iommu == NULL) { 702 pci_info(pdev, "%s find iommu failed by dev\n", __func__); 703 return iommu_dev; 704 } 705 dev_data = kzalloc(sizeof(*dev_data), GFP_KERNEL); 706 if (!dev_data) 707 return iommu_dev; 708 devid = PCI_DEVID(bus->number, pdev->devfn); 709 dev_data->bdf = devid; 710 711 pci_info(pdev, "%s bdf %#x iommu dev id %#x\n", __func__, dev_data->bdf, iommu->devid); 712 /* The initial state is 0, and 1 is added only when attach dev */ 713 dev_data->count = 0; 714 dev_data->iommu = iommu; 715 dev_data->dev = dev; 716 dev->archdata.iommu = dev_data; 717 iommu_dev = &iommu->iommu_dev; 718 return iommu_dev; 719 } 720 721 struct iommu_device *la_iommu_probe_device(struct device *dev) 722 { 723 return iommu_init_device(dev); 724 } 725 726 static struct iommu_group *la_iommu_device_group(struct device *dev) 727 { 728 struct iommu_group *group; 729 730 /* 731 * We don't support devices sharing stream IDs other than PCI RID 732 * aliases, since the necessary ID-to-device lookup becomes rather 733 * impractical given a potential sparse 32-bit stream ID space. 734 */ 735 if (dev_is_pci(dev)) 736 group = pci_device_group(dev); 737 else 738 group = generic_device_group(dev); 739 return group; 740 } 741 742 static void la_iommu_remove_device(struct device *dev) 743 { 744 struct la_iommu_dev_data *dev_data; 745 746 iommu_group_remove_device(dev); 747 dev_data = dev->archdata.iommu; 748 dev->archdata.iommu = NULL; 749 kfree(dev_data); 750 } 751 752 struct iommu_info *get_iommu_info_from_dom(struct dom_info *priv, struct loongarch_iommu *iommu) 753 { 754 struct iommu_info *info; 755 756 spin_lock(&priv->lock); 757 list_for_each_entry(info, &priv->iommu_devlist, list) { 758 if (info->iommu == iommu) { 759 spin_unlock(&priv->lock); 760 return info; 761 } 762 } 763 spin_unlock(&priv->lock); 764 return NULL; 765 } 766 767 struct iommu_info *domain_attach_iommu(struct dom_info *priv, struct loongarch_iommu *iommu) 768 { 769 u32 dir_ctrl; 770 struct iommu_info *info; 771 unsigned long phys; 772 773 info = get_iommu_info_from_dom(priv, iommu); 774 if (info) 775 return info; 776 777 info = kzalloc(sizeof(struct iommu_info), GFP_KERNEL_ACCOUNT); 778 if (!info) 779 return NULL; 780 781 INIT_LIST_HEAD(&info->dev_list); 782 info->iommu = iommu; 783 info->id = domain_id_alloc(iommu); 784 if (info->id == -1) { 785 pr_info("%s alloc id for domain failed\n", __func__); 786 kfree(info); 787 return NULL; 788 } 789 790 phys = virt_to_phys(priv->pgd); 791 dir_ctrl = (IOMMU_LEVEL_STRIDE << 26) | (IOMMU_LEVEL_SHIFT(2) << 20); 792 dir_ctrl |= (IOMMU_LEVEL_STRIDE << 16) | (IOMMU_LEVEL_SHIFT(1) << 10); 793 dir_ctrl |= (IOMMU_LEVEL_STRIDE << 6) | IOMMU_LEVEL_SHIFT(0); 794 iommu_write_regl(iommu, LA_IOMMU_DIR_CTRL(info->id), dir_ctrl); 795 iommu_write_regl(iommu, LA_IOMMU_PGD_HI(info->id), phys >> 32); 796 iommu_write_regl(iommu, LA_IOMMU_PGD_LO(info->id), phys & UINT_MAX); 797 798 spin_lock(&priv->lock); 799 list_add(&info->list, &priv->iommu_devlist); 800 spin_unlock(&priv->lock); 801 add_domain_to_list(iommu, priv); 802 return info; 803 } 804

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