Re: [PATCH V7] acpi/prmt: find block with specific type

From: kernel test robot
Date: Sat Oct 12 2024 - 13:26:22 EST

Hi KobaK,

kernel test robot noticed the following build warnings:

[auto build test WARNING on rafael-pm/linux-next]
[also build test WARNING on rafael-pm/bleeding-edge linus/master v6.12-rc2 next-20241011]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/KobaK/acpi-prmt-find-block-with-specific-type/20241009-144658
base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
patch link: https://lore.kernel.org/r/20241009064517.2678456-1-kobak%40nvidia.com
patch subject: [PATCH V7] acpi/prmt: find block with specific type
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20241013/202410130117.PZ2JPuxo-lkp@xxxxxxxxx/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241013/202410130117.PZ2JPuxo-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202410130117.PZ2JPuxo-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> drivers/acpi/prmt.c:88:60: warning: format specifies type 'void *' but the argument has type 'u64' (aka 'unsigned long long') [-Wformat]
88 | pr_warn("Failed to find VA for GUID: %pUL, PA: %p", guid, pa);
| ~~ ^~
| %llu
include/linux/printk.h:543:37: note: expanded from macro 'pr_warn'
543 | printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
| ~~~ ^~~~~~~~~~~
include/linux/printk.h:490:60: note: expanded from macro 'printk'
490 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ~~~ ^~~~~~~~~~~
include/linux/printk.h:462:19: note: expanded from macro 'printk_index_wrap'
462 | _p_func(_fmt, ##__VA_ARGS__); \
| ~~~~ ^~~~~~~~~~~
>> drivers/acpi/prmt.c:156:29: warning: passing 1-byte aligned argument to 4-byte aligned parameter 1 of 'efi_pa_va_lookup' may result in an unaligned pointer access [-Walign-mismatch]
156 | (void *)efi_pa_va_lookup(&th->guid, handler_info->handler_address);
| ^
drivers/acpi/prmt.c:159:21: warning: passing 1-byte aligned argument to 4-byte aligned parameter 1 of 'efi_pa_va_lookup' may result in an unaligned pointer access [-Walign-mismatch]
159 | efi_pa_va_lookup(&th->guid, handler_info->static_data_buffer_address);
| ^
drivers/acpi/prmt.c:162:21: warning: passing 1-byte aligned argument to 4-byte aligned parameter 1 of 'efi_pa_va_lookup' may result in an unaligned pointer access [-Walign-mismatch]
162 | efi_pa_va_lookup(&th->guid, handler_info->acpi_param_buffer_address);
| ^
4 warnings generated.


vim +88 drivers/acpi/prmt.c

74
75 static u64 efi_pa_va_lookup(efi_guid_t *guid, u64 pa)
76 {
77 efi_memory_desc_t *md;
78 u64 pa_offset = pa & ~PAGE_MASK;
79 u64 page = pa & PAGE_MASK;
80
81 for_each_efi_memory_desc(md) {
82 if ((md->attribute & EFI_MEMORY_RUNTIME) &&
83 (md->phys_addr < pa && pa < md->phys_addr + PAGE_SIZE * md->num_pages)) {
84 return pa_offset + md->virt_addr + page - md->phys_addr;
85 }
86 }
87
> 88 pr_warn("Failed to find VA for GUID: %pUL, PA: %p", guid, pa);
89
90 return 0;
91 }
92
93 #define get_first_handler(a) ((struct acpi_prmt_handler_info *) ((char *) (a) + a->handler_info_offset))
94 #define get_next_handler(a) ((struct acpi_prmt_handler_info *) (sizeof(struct acpi_prmt_handler_info) + (char *) a))
95
96 static int __init
97 acpi_parse_prmt(union acpi_subtable_headers *header, const unsigned long end)
98 {
99 struct acpi_prmt_module_info *module_info;
100 struct acpi_prmt_handler_info *handler_info;
101 struct prm_handler_info *th;
102 struct prm_module_info *tm;
103 u64 *mmio_count;
104 u64 cur_handler = 0;
105 u32 module_info_size = 0;
106 u64 mmio_range_size = 0;
107 void *temp_mmio;
108
109 module_info = (struct acpi_prmt_module_info *) header;
110 module_info_size = struct_size(tm, handlers, module_info->handler_info_count);
111 tm = kmalloc(module_info_size, GFP_KERNEL);
112 if (!tm)
113 goto parse_prmt_out1;
114
115 guid_copy(&tm->guid, (guid_t *) module_info->module_guid);
116 tm->major_rev = module_info->major_rev;
117 tm->minor_rev = module_info->minor_rev;
118 tm->handler_count = module_info->handler_info_count;
119 tm->updatable = true;
120
121 if (module_info->mmio_list_pointer) {
122 /*
123 * Each module is associated with a list of addr
124 * ranges that it can use during the service
125 */
126 mmio_count = (u64 *) memremap(module_info->mmio_list_pointer, 8, MEMREMAP_WB);
127 if (!mmio_count)
128 goto parse_prmt_out2;
129
130 mmio_range_size = struct_size(tm->mmio_info, addr_ranges, *mmio_count);
131 tm->mmio_info = kmalloc(mmio_range_size, GFP_KERNEL);
132 if (!tm->mmio_info)
133 goto parse_prmt_out3;
134
135 temp_mmio = memremap(module_info->mmio_list_pointer, mmio_range_size, MEMREMAP_WB);
136 if (!temp_mmio)
137 goto parse_prmt_out4;
138 memmove(tm->mmio_info, temp_mmio, mmio_range_size);
139 } else {
140 tm->mmio_info = kmalloc(sizeof(*tm->mmio_info), GFP_KERNEL);
141 if (!tm->mmio_info)
142 goto parse_prmt_out2;
143
144 tm->mmio_info->mmio_count = 0;
145 }
146
147 INIT_LIST_HEAD(&tm->module_list);
148 list_add(&tm->module_list, &prm_module_list);
149
150 handler_info = get_first_handler(module_info);
151 do {
152 th = &tm->handlers[cur_handler];
153
154 guid_copy(&th->guid, (guid_t *)handler_info->handler_guid);
155 th->handler_addr =
> 156 (void *)efi_pa_va_lookup(&th->guid, handler_info->handler_address);
157
158 th->static_data_buffer_addr =
159 efi_pa_va_lookup(&th->guid, handler_info->static_data_buffer_address);
160
161 th->acpi_param_buffer_addr =
162 efi_pa_va_lookup(&th->guid, handler_info->acpi_param_buffer_address);
163
164 } while (++cur_handler < tm->handler_count && (handler_info = get_next_handler(handler_info)));
165
166 return 0;
167
168 parse_prmt_out4:
169 kfree(tm->mmio_info);
170 parse_prmt_out3:
171 memunmap(mmio_count);
172 parse_prmt_out2:
173 kfree(tm);
174 parse_prmt_out1:
175 return -ENOMEM;
176 }
177

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