[intel-lts:6.12/linux 857/985] drivers/gpu/drm/i915/gt/iov/selftests/selftest_mock_iov_ggtt.c:318:27: warning: implicit conversion from 'unsigned long long' to 'size_t' (aka 'unsigned int') changes value from 4294967296 to 0

[intel-lts:6.12/linux 857/985] drivers/gpu/drm/i915/gt/iov/selftests/selftest_mock_iov_ggtt.c:318:27: warning: implicit conversion from 'unsigned long long' to 'size_t' (aka 'unsigned int') changes value from 4294967296 to 0

[kernel test robot]

tree:   https://github.com/intel/linux-intel-lts.git 6.12/linux
head:   cc39c53db6bcd7f04407f1cae883e5d0af6db765
commit: 9b622d237b5e58a4487cdd78f397ee43161ebab0 [857/985] drm/i915/iov: Shadow GGTT mock selftestes
config: i386-buildonly-randconfig-006-20241218 (https://download.01.org/0day-ci/archive/20241218/202412181544.Py10CSwa-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241218/202412181544.Py10CSwa-lkp@intel.com/reproduce)

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/202412181544.Py10CSwa-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/gpu/drm/i915/gt/iov/intel_iov_ggtt.c:7:
   In file included from drivers/gpu/drm/i915/gt/iov/intel_iov_ggtt.h:9:
   In file included from drivers/gpu/drm/i915/gt/intel_gtt.h:19:
   In file included from include/linux/io-mapping.h:33:
   In file included from arch/x86/include/asm/iomap.h:10:
   In file included from include/linux/mm.h:2213:
   include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     518 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   In file included from drivers/gpu/drm/i915/gt/iov/intel_iov_ggtt.c:589:
>> drivers/gpu/drm/i915/gt/iov/selftests/selftest_mock_iov_ggtt.c:318:27: warning: implicit conversion from 'unsigned long long' to 'size_t' (aka 'unsigned int') changes value from 4294967296 to 0 [-Wconstant-conversion]
     318 |         const size_t ggtt_size = SZ_4G;
         |                      ~~~~~~~~~   ^~~~~
   include/linux/sizes.h:46:18: note: expanded from macro 'SZ_4G'
      46 | #define SZ_4G                           _AC(0x100000000, ULL)
         |                                         ^~~~~~~~~~~~~~~~~~~~~
   include/uapi/linux/const.h:21:18: note: expanded from macro '_AC'
      21 | #define _AC(X,Y)        __AC(X,Y)
         |                         ^~~~~~~~~
   include/uapi/linux/const.h:20:20: note: expanded from macro '__AC'
      20 | #define __AC(X,Y)       (X##Y)
         |                          ^~~~
   <scratch space>:53:1: note: expanded from here
      53 | 0x100000000ULL
         | ^~~~~~~~~~~~~~
   2 warnings generated.


vim +318 drivers/gpu/drm/i915/gt/iov/selftests/selftest_mock_iov_ggtt.c

   313	
   314	static int mock_ggtt_shadow_restore_new_vfid(void *arg)
   315	{
   316		struct intel_iov *iov = arg;
   317		const u64 start_ggtt = 0;
 > 318		const size_t ggtt_size = SZ_4G;
   319		const unsigned int vfid = VFID(1);
   320		const unsigned int new_vfid = VFID(2);
   321		struct drm_mm_node *old_node, *new_node;
   322		gen8_pte_t *buf, *origin_buf, *shadow_ggtt, *hw_ptes;
   323		size_t size;
   324		u64 ggtt_addr;
   325		int err;
   326	
   327		err = mock_ggtt_shadow_init_test(iov);
   328		if (err < 0)
   329			return err;
   330	
   331		old_node = mock_provisioning_ggtt_init(iov, vfid, start_ggtt, ggtt_size);
   332		new_node = mock_provisioning_ggtt_init(iov, new_vfid, start_ggtt, ggtt_size);
   333	
   334		size = ggtt_size_to_ptes_size(ggtt_size);
   335	
   336		iov->pf.ggtt.selftest.mock_update_ptes = mock_update_ptes;
   337		iov->pf.ggtt.selftest.ptes = kvzalloc(size, GFP_KERNEL);
   338		if (!iov->pf.ggtt.selftest.ptes) {
   339			err = -ENOMEM;
   340			goto out_fini;
   341		}
   342	
   343		origin_buf = kvzalloc(size, GFP_KERNEL);
   344		if (!origin_buf) {
   345			err = -ENOMEM;
   346			goto out_free_ptes;
   347		}
   348	
   349		err = intel_iov_ggtt_shadow_vf_alloc(iov, vfid, old_node);
   350		if (err < 0)
   351			goto out_free_buf;
   352	
   353		err = intel_iov_ggtt_shadow_vf_alloc(iov, new_vfid, new_node);
   354		if (err < 0)
   355			goto out_free_vf;
   356	
   357		buf = origin_buf;
   358		for_each_ggtt_page(ggtt_addr, old_node)
   359			*(buf++) = make_pte(ggtt_addr, 0);
   360	
   361		intel_iov_ggtt_shadow_restore(iov, new_vfid, origin_buf, size,
   362						   FIELD_PREP(I915_GGTT_RESTORE_PTES_VFID_MASK, new_vfid) |
   363						   I915_GGTT_RESTORE_PTES_NEW_VFID);
   364	
   365		shadow_ggtt = iov->pf.ggtt.shadows_ggtt[new_vfid].ptes;
   366		hw_ptes = iov->pf.ggtt.selftest.ptes;
   367		for_each_ggtt_page(ggtt_addr, new_node) {
   368			gen8_pte_t current_shadow_pte = *(shadow_ggtt++);
   369			gen8_pte_t current_hw_pte = *(hw_ptes++);
   370			gen8_pte_t expected_pte = make_pte(ggtt_addr, new_vfid);
   371	
   372			if (current_shadow_pte != expected_pte || current_hw_pte != expected_pte) {
   373				IOV_SELFTEST_ERROR(iov,
   374						   "PTE values for GGTT address %llx, not match with expected value, expected: %#llx from shadow GGTT: %#llx, from HW: %#llx\n",
   375						   ggtt_addr, expected_pte, current_shadow_pte,
   376						   current_hw_pte);
   377				err = -EINVAL;
   378				break;
   379			}
   380		}
   381	
   382		intel_iov_ggtt_shadow_vf_free(iov, new_vfid);
   383	out_free_vf:
   384		intel_iov_ggtt_shadow_vf_free(iov, vfid);
   385	out_free_buf:
   386		kvfree(origin_buf);
   387	out_free_ptes:
   388		kvfree(iov->pf.ggtt.selftest.ptes);
   389		iov->pf.ggtt.selftest.ptes = NULL;
   390	out_fini:
   391		mock_ggtt_shadow_fini_test(iov);
   392		return err;
   393	}
   394	

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