Re: [PATCH v1 6/8] vfio/type1: Bind guest page tables to host

[kbuild test robot <lkp@intel.com>]

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Hi Yi,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on vfio/next]
[also build test ERROR on v5.6-rc6 next-20200320]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Liu-Yi-L/vfio-expose-virtual-Shared-Virtual-Addressing-to-VMs/20200322-213259
base:   https://github.com/awilliam/linux-vfio.git next
config: arm64-defconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=9.2.0 make.cross ARCH=arm64 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   drivers/vfio/vfio_iommu_type1.c: In function 'vfio_iommu_get_stage1_format':
   drivers/vfio/vfio_iommu_type1.c:2300:4: error: 'DOMAIN_ATTR_PASID_FORMAT' undeclared (first use in this function)
    2300 |    DOMAIN_ATTR_PASID_FORMAT, &format)) {
         |    ^~~~~~~~~~~~~~~~~~~~~~~~
   drivers/vfio/vfio_iommu_type1.c:2300:4: note: each undeclared identifier is reported only once for each function it appears in
   drivers/vfio/vfio_iommu_type1.c: In function 'vfio_iommu_type1_ioctl':
   drivers/vfio/vfio_iommu_type1.c:2464:11: error: implicit declaration of function 'iommu_get_uapi_version' [-Werror=implicit-function-declaration]
    2464 |    return iommu_get_uapi_version();
         |           ^~~~~~~~~~~~~~~~~~~~~~
>> drivers/vfio/vfio_iommu_type1.c:2626:15: error: implicit declaration of function 'iommu_uapi_get_data_size' [-Werror=implicit-function-declaration]
    2626 |   data_size = iommu_uapi_get_data_size(
         |               ^~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/vfio/vfio_iommu_type1.c:2627:5: error: 'IOMMU_UAPI_BIND_GPASID' undeclared (first use in this function)
    2627 |     IOMMU_UAPI_BIND_GPASID, version);
         |     ^~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/iommu_uapi_get_data_size +2626 drivers/vfio/vfio_iommu_type1.c

  2446	
  2447	static long vfio_iommu_type1_ioctl(void *iommu_data,
  2448					   unsigned int cmd, unsigned long arg)
  2449	{
  2450		struct vfio_iommu *iommu = iommu_data;
  2451		unsigned long minsz;
  2452	
  2453		if (cmd == VFIO_CHECK_EXTENSION) {
  2454			switch (arg) {
  2455			case VFIO_TYPE1_IOMMU:
  2456			case VFIO_TYPE1v2_IOMMU:
  2457			case VFIO_TYPE1_NESTING_IOMMU:
  2458				return 1;
  2459			case VFIO_DMA_CC_IOMMU:
  2460				if (!iommu)
  2461					return 0;
  2462				return vfio_domains_have_iommu_cache(iommu);
  2463			case VFIO_NESTING_IOMMU_UAPI:
  2464				return iommu_get_uapi_version();
  2465			default:
  2466				return 0;
  2467			}
  2468		} else if (cmd == VFIO_IOMMU_GET_INFO) {
  2469			struct vfio_iommu_type1_info info;
  2470			struct vfio_info_cap caps = { .buf = NULL, .size = 0 };
  2471			unsigned long capsz;
  2472			int ret;
  2473	
  2474			minsz = offsetofend(struct vfio_iommu_type1_info, iova_pgsizes);
  2475	
  2476			/* For backward compatibility, cannot require this */
  2477			capsz = offsetofend(struct vfio_iommu_type1_info, cap_offset);
  2478	
  2479			if (copy_from_user(&info, (void __user *)arg, minsz))
  2480				return -EFAULT;
  2481	
  2482			if (info.argsz < minsz)
  2483				return -EINVAL;
  2484	
  2485			if (info.argsz >= capsz) {
  2486				minsz = capsz;
  2487				info.cap_offset = 0; /* output, no-recopy necessary */
  2488			}
  2489	
  2490			info.flags = VFIO_IOMMU_INFO_PGSIZES;
  2491	
  2492			info.iova_pgsizes = vfio_pgsize_bitmap(iommu);
  2493	
  2494			ret = vfio_iommu_iova_build_caps(iommu, &caps);
  2495			if (ret)
  2496				return ret;
  2497	
  2498			ret = vfio_iommu_info_add_nesting_cap(iommu, &caps);
  2499			if (ret)
  2500				return ret;
  2501	
  2502			if (caps.size) {
  2503				info.flags |= VFIO_IOMMU_INFO_CAPS;
  2504	
  2505				if (info.argsz < sizeof(info) + caps.size) {
  2506					info.argsz = sizeof(info) + caps.size;
  2507				} else {
  2508					vfio_info_cap_shift(&caps, sizeof(info));
  2509					if (copy_to_user((void __user *)arg +
  2510							sizeof(info), caps.buf,
  2511							caps.size)) {
  2512						kfree(caps.buf);
  2513						return -EFAULT;
  2514					}
  2515					info.cap_offset = sizeof(info);
  2516				}
  2517	
  2518				kfree(caps.buf);
  2519			}
  2520	
  2521			return copy_to_user((void __user *)arg, &info, minsz) ?
  2522				-EFAULT : 0;
  2523	
  2524		} else if (cmd == VFIO_IOMMU_MAP_DMA) {
  2525			struct vfio_iommu_type1_dma_map map;
  2526			uint32_t mask = VFIO_DMA_MAP_FLAG_READ |
  2527					VFIO_DMA_MAP_FLAG_WRITE;
  2528	
  2529			minsz = offsetofend(struct vfio_iommu_type1_dma_map, size);
  2530	
  2531			if (copy_from_user(&map, (void __user *)arg, minsz))
  2532				return -EFAULT;
  2533	
  2534			if (map.argsz < minsz || map.flags & ~mask)
  2535				return -EINVAL;
  2536	
  2537			return vfio_dma_do_map(iommu, &map);
  2538	
  2539		} else if (cmd == VFIO_IOMMU_UNMAP_DMA) {
  2540			struct vfio_iommu_type1_dma_unmap unmap;
  2541			long ret;
  2542	
  2543			minsz = offsetofend(struct vfio_iommu_type1_dma_unmap, size);
  2544	
  2545			if (copy_from_user(&unmap, (void __user *)arg, minsz))
  2546				return -EFAULT;
  2547	
  2548			if (unmap.argsz < minsz || unmap.flags)
  2549				return -EINVAL;
  2550	
  2551			ret = vfio_dma_do_unmap(iommu, &unmap);
  2552			if (ret)
  2553				return ret;
  2554	
  2555			return copy_to_user((void __user *)arg, &unmap, minsz) ?
  2556				-EFAULT : 0;
  2557	
  2558		} else if (cmd == VFIO_IOMMU_PASID_REQUEST) {
  2559			struct vfio_iommu_type1_pasid_request req;
  2560			unsigned long offset;
  2561	
  2562			minsz = offsetofend(struct vfio_iommu_type1_pasid_request,
  2563					    flags);
  2564	
  2565			if (copy_from_user(&req, (void __user *)arg, minsz))
  2566				return -EFAULT;
  2567	
  2568			if (req.argsz < minsz ||
  2569			    !vfio_iommu_type1_pasid_req_valid(req.flags))
  2570				return -EINVAL;
  2571	
  2572			if (copy_from_user((void *)&req + minsz,
  2573					   (void __user *)arg + minsz,
  2574					   sizeof(req) - minsz))
  2575				return -EFAULT;
  2576	
  2577			switch (req.flags & VFIO_PASID_REQUEST_MASK) {
  2578			case VFIO_IOMMU_PASID_ALLOC:
  2579			{
  2580				int ret = 0, result;
  2581	
  2582				result = vfio_iommu_type1_pasid_alloc(iommu,
  2583								req.alloc_pasid.min,
  2584								req.alloc_pasid.max);
  2585				if (result > 0) {
  2586					offset = offsetof(
  2587						struct vfio_iommu_type1_pasid_request,
  2588						alloc_pasid.result);
  2589					ret = copy_to_user(
  2590						      (void __user *) (arg + offset),
  2591						      &result, sizeof(result));
  2592				} else {
  2593					pr_debug("%s: PASID alloc failed\n", __func__);
  2594					ret = -EFAULT;
  2595				}
  2596				return ret;
  2597			}
  2598			case VFIO_IOMMU_PASID_FREE:
  2599				return vfio_iommu_type1_pasid_free(iommu,
  2600								   req.free_pasid);
  2601			default:
  2602				return -EINVAL;
  2603			}
  2604	
  2605		} else if (cmd == VFIO_IOMMU_BIND) {
  2606			struct vfio_iommu_type1_bind bind;
  2607			u32 version;
  2608			int data_size;
  2609			void *gbind_data;
  2610			int ret;
  2611	
  2612			minsz = offsetofend(struct vfio_iommu_type1_bind, flags);
  2613	
  2614			if (copy_from_user(&bind, (void __user *)arg, minsz))
  2615				return -EFAULT;
  2616	
  2617			if (bind.argsz < minsz)
  2618				return -EINVAL;
  2619	
  2620			/* Get the version of struct iommu_gpasid_bind_data */
  2621			if (copy_from_user(&version,
  2622				(void __user *) (arg + minsz),
  2623						sizeof(version)))
  2624				return -EFAULT;
  2625	
> 2626			data_size = iommu_uapi_get_data_size(
> 2627					IOMMU_UAPI_BIND_GPASID, version);
  2628			gbind_data = kzalloc(data_size, GFP_KERNEL);
  2629			if (!gbind_data)
  2630				return -ENOMEM;
  2631	
  2632			if (copy_from_user(gbind_data,
  2633				 (void __user *) (arg + minsz), data_size)) {
  2634				kfree(gbind_data);
  2635				return -EFAULT;
  2636			}
  2637	
  2638			switch (bind.flags & VFIO_IOMMU_BIND_MASK) {
  2639			case VFIO_IOMMU_BIND_GUEST_PGTBL:
  2640				ret = vfio_iommu_type1_bind_gpasid(iommu,
  2641								   gbind_data);
  2642				break;
  2643			case VFIO_IOMMU_UNBIND_GUEST_PGTBL:
  2644				ret = vfio_iommu_type1_unbind_gpasid(iommu,
  2645								     gbind_data);
  2646				break;
  2647			default:
  2648				ret = -EINVAL;
  2649				break;
  2650			}
  2651			kfree(gbind_data);
  2652			return ret;
  2653		}
  2654	
  2655		return -ENOTTY;
  2656	}
  2657	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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