CC: kbuild-...@lists.01.org CC: linux-ker...@vger.kernel.org TO: Kefeng Wang <wangkefeng.w...@huawei.com> CC: Palmer Dabbelt <palmerdabb...@google.com>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: ff1176468d368232b684f75e82563369208bc371 commit: a5406a7ff56e63376c210b06072aa0ef23473366 riscv: Correct SPARSEMEM configuration date: 4 months ago :::::: branch date: 10 hours ago :::::: commit date: 4 months ago config: riscv-randconfig-m031-20210726 (attached as .config) compiler: riscv32-linux-gcc (GCC) 10.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <l...@intel.com> Reported-by: Dan Carpenter <dan.carpen...@oracle.com> smatch warnings: drivers/firmware/efi/capsule.c:172 efi_capsule_update_locked() warn: should '() << (12)' be a 64 bit type? drivers/firmware/efi/capsule.c:267 efi_capsule_update() warn: should '() << (12)' be a 64 bit type? vim +172 drivers/firmware/efi/capsule.c f0133f3c5b8bb34 Matt Fleming 2016-04-25 126 f0133f3c5b8bb34 Matt Fleming 2016-04-25 127 /** f0133f3c5b8bb34 Matt Fleming 2016-04-25 128 * efi_capsule_update_locked - pass a single capsule to the firmware f0133f3c5b8bb34 Matt Fleming 2016-04-25 129 * @capsule: capsule to send to the firmware f0133f3c5b8bb34 Matt Fleming 2016-04-25 130 * @sg_pages: array of scatter gather (block descriptor) pages f0133f3c5b8bb34 Matt Fleming 2016-04-25 131 * @reset: the reset type required for @capsule f0133f3c5b8bb34 Matt Fleming 2016-04-25 132 * f0133f3c5b8bb34 Matt Fleming 2016-04-25 133 * Since this function must be called under capsule_mutex check f0133f3c5b8bb34 Matt Fleming 2016-04-25 134 * whether efi_reset_type will conflict with @reset, and atomically f0133f3c5b8bb34 Matt Fleming 2016-04-25 135 * set it and capsule_pending if a capsule was successfully sent to f0133f3c5b8bb34 Matt Fleming 2016-04-25 136 * the firmware. f0133f3c5b8bb34 Matt Fleming 2016-04-25 137 * f0133f3c5b8bb34 Matt Fleming 2016-04-25 138 * We also check to see if the system is about to restart, and if so, f0133f3c5b8bb34 Matt Fleming 2016-04-25 139 * abort. This avoids races between efi_capsule_update() and f0133f3c5b8bb34 Matt Fleming 2016-04-25 140 * efi_capsule_pending(). f0133f3c5b8bb34 Matt Fleming 2016-04-25 141 */ f0133f3c5b8bb34 Matt Fleming 2016-04-25 142 static int f0133f3c5b8bb34 Matt Fleming 2016-04-25 143 efi_capsule_update_locked(efi_capsule_header_t *capsule, f0133f3c5b8bb34 Matt Fleming 2016-04-25 144 struct page **sg_pages, int reset) f0133f3c5b8bb34 Matt Fleming 2016-04-25 145 { f0133f3c5b8bb34 Matt Fleming 2016-04-25 146 efi_physical_addr_t sglist_phys; f0133f3c5b8bb34 Matt Fleming 2016-04-25 147 efi_status_t status; f0133f3c5b8bb34 Matt Fleming 2016-04-25 148 f0133f3c5b8bb34 Matt Fleming 2016-04-25 149 lockdep_assert_held(&capsule_mutex); f0133f3c5b8bb34 Matt Fleming 2016-04-25 150 f0133f3c5b8bb34 Matt Fleming 2016-04-25 151 /* f0133f3c5b8bb34 Matt Fleming 2016-04-25 152 * If someone has already registered a capsule that requires a f0133f3c5b8bb34 Matt Fleming 2016-04-25 153 * different reset type, we're out of luck and must abort. f0133f3c5b8bb34 Matt Fleming 2016-04-25 154 */ f0133f3c5b8bb34 Matt Fleming 2016-04-25 155 if (efi_reset_type >= 0 && efi_reset_type != reset) { f0133f3c5b8bb34 Matt Fleming 2016-04-25 156 pr_err("Conflicting capsule reset type %d (%d).\n", f0133f3c5b8bb34 Matt Fleming 2016-04-25 157 reset, efi_reset_type); f0133f3c5b8bb34 Matt Fleming 2016-04-25 158 return -EINVAL; f0133f3c5b8bb34 Matt Fleming 2016-04-25 159 } f0133f3c5b8bb34 Matt Fleming 2016-04-25 160 f0133f3c5b8bb34 Matt Fleming 2016-04-25 161 /* f0133f3c5b8bb34 Matt Fleming 2016-04-25 162 * If the system is getting ready to restart it may have f0133f3c5b8bb34 Matt Fleming 2016-04-25 163 * called efi_capsule_pending() to make decisions (such as f0133f3c5b8bb34 Matt Fleming 2016-04-25 164 * whether to force an EFI reboot), and we're racing against f0133f3c5b8bb34 Matt Fleming 2016-04-25 165 * that call. Abort in that case. f0133f3c5b8bb34 Matt Fleming 2016-04-25 166 */ 62075e581802ea1 Matt Fleming 2016-05-06 167 if (unlikely(stop_capsules)) { f0133f3c5b8bb34 Matt Fleming 2016-04-25 168 pr_warn("Capsule update raced with reboot, aborting.\n"); f0133f3c5b8bb34 Matt Fleming 2016-04-25 169 return -EINVAL; f0133f3c5b8bb34 Matt Fleming 2016-04-25 170 } f0133f3c5b8bb34 Matt Fleming 2016-04-25 171 f0133f3c5b8bb34 Matt Fleming 2016-04-25 @172 sglist_phys = page_to_phys(sg_pages[0]); f0133f3c5b8bb34 Matt Fleming 2016-04-25 173 f0133f3c5b8bb34 Matt Fleming 2016-04-25 174 status = efi.update_capsule(&capsule, 1, sglist_phys); f0133f3c5b8bb34 Matt Fleming 2016-04-25 175 if (status == EFI_SUCCESS) { f0133f3c5b8bb34 Matt Fleming 2016-04-25 176 capsule_pending = true; f0133f3c5b8bb34 Matt Fleming 2016-04-25 177 efi_reset_type = reset; f0133f3c5b8bb34 Matt Fleming 2016-04-25 178 } f0133f3c5b8bb34 Matt Fleming 2016-04-25 179 f0133f3c5b8bb34 Matt Fleming 2016-04-25 180 return efi_status_to_err(status); f0133f3c5b8bb34 Matt Fleming 2016-04-25 181 } f0133f3c5b8bb34 Matt Fleming 2016-04-25 182 f0133f3c5b8bb34 Matt Fleming 2016-04-25 183 /** f0133f3c5b8bb34 Matt Fleming 2016-04-25 184 * efi_capsule_update - send a capsule to the firmware f0133f3c5b8bb34 Matt Fleming 2016-04-25 185 * @capsule: capsule to send to firmware f0133f3c5b8bb34 Matt Fleming 2016-04-25 186 * @pages: an array of capsule data pages f0133f3c5b8bb34 Matt Fleming 2016-04-25 187 * f0133f3c5b8bb34 Matt Fleming 2016-04-25 188 * Build a scatter gather list with EFI capsule block descriptors to f0133f3c5b8bb34 Matt Fleming 2016-04-25 189 * map the capsule described by @capsule with its data in @pages and f0133f3c5b8bb34 Matt Fleming 2016-04-25 190 * send it to the firmware via the UpdateCapsule() runtime service. f0133f3c5b8bb34 Matt Fleming 2016-04-25 191 * 6862e6ad95e9849 Austin Christ 2016-08-11 192 * @capsule must be a virtual mapping of the complete capsule update in the 6862e6ad95e9849 Austin Christ 2016-08-11 193 * kernel address space, as the capsule can be consumed immediately. 6862e6ad95e9849 Austin Christ 2016-08-11 194 * A capsule_header_t that describes the entire contents of the capsule f0133f3c5b8bb34 Matt Fleming 2016-04-25 195 * must be at the start of the first data page. f0133f3c5b8bb34 Matt Fleming 2016-04-25 196 * f0133f3c5b8bb34 Matt Fleming 2016-04-25 197 * Even though this function will validate that the firmware supports f0133f3c5b8bb34 Matt Fleming 2016-04-25 198 * the capsule guid, users will likely want to check that f0133f3c5b8bb34 Matt Fleming 2016-04-25 199 * efi_capsule_supported() returns true before calling this function f0133f3c5b8bb34 Matt Fleming 2016-04-25 200 * because it makes it easier to print helpful error messages. f0133f3c5b8bb34 Matt Fleming 2016-04-25 201 * f0133f3c5b8bb34 Matt Fleming 2016-04-25 202 * If the capsule is successfully submitted to the firmware, any f0133f3c5b8bb34 Matt Fleming 2016-04-25 203 * subsequent calls to efi_capsule_pending() will return true. @pages f0133f3c5b8bb34 Matt Fleming 2016-04-25 204 * must not be released or modified if this function returns f0133f3c5b8bb34 Matt Fleming 2016-04-25 205 * successfully. f0133f3c5b8bb34 Matt Fleming 2016-04-25 206 * f0133f3c5b8bb34 Matt Fleming 2016-04-25 207 * Callers must be prepared for this function to fail, which can f0133f3c5b8bb34 Matt Fleming 2016-04-25 208 * happen if we raced with system reboot or if there is already a f0133f3c5b8bb34 Matt Fleming 2016-04-25 209 * pending capsule that has a reset type that conflicts with the one f0133f3c5b8bb34 Matt Fleming 2016-04-25 210 * required by @capsule. Do NOT use efi_capsule_pending() to detect f0133f3c5b8bb34 Matt Fleming 2016-04-25 211 * this conflict since that would be racy. Instead, submit the capsule f0133f3c5b8bb34 Matt Fleming 2016-04-25 212 * to efi_capsule_update() and check the return value. f0133f3c5b8bb34 Matt Fleming 2016-04-25 213 * f0133f3c5b8bb34 Matt Fleming 2016-04-25 214 * Return 0 on success, a converted EFI status code on failure. f0133f3c5b8bb34 Matt Fleming 2016-04-25 215 */ 2a457fb31df62c6 Ard Biesheuvel 2017-06-02 216 int efi_capsule_update(efi_capsule_header_t *capsule, phys_addr_t *pages) f0133f3c5b8bb34 Matt Fleming 2016-04-25 217 { f0133f3c5b8bb34 Matt Fleming 2016-04-25 218 u32 imagesize = capsule->imagesize; f0133f3c5b8bb34 Matt Fleming 2016-04-25 219 efi_guid_t guid = capsule->guid; f0133f3c5b8bb34 Matt Fleming 2016-04-25 220 unsigned int count, sg_count; f0133f3c5b8bb34 Matt Fleming 2016-04-25 221 u32 flags = capsule->flags; f0133f3c5b8bb34 Matt Fleming 2016-04-25 222 struct page **sg_pages; f0133f3c5b8bb34 Matt Fleming 2016-04-25 223 int rv, reset_type; f0133f3c5b8bb34 Matt Fleming 2016-04-25 224 int i, j; f0133f3c5b8bb34 Matt Fleming 2016-04-25 225 f0133f3c5b8bb34 Matt Fleming 2016-04-25 226 rv = efi_capsule_supported(guid, flags, imagesize, &reset_type); f0133f3c5b8bb34 Matt Fleming 2016-04-25 227 if (rv) f0133f3c5b8bb34 Matt Fleming 2016-04-25 228 return rv; f0133f3c5b8bb34 Matt Fleming 2016-04-25 229 f0133f3c5b8bb34 Matt Fleming 2016-04-25 230 count = DIV_ROUND_UP(imagesize, PAGE_SIZE); f0133f3c5b8bb34 Matt Fleming 2016-04-25 231 sg_count = sg_pages_num(count); f0133f3c5b8bb34 Matt Fleming 2016-04-25 232 6396bb221514d28 Kees Cook 2018-06-12 233 sg_pages = kcalloc(sg_count, sizeof(*sg_pages), GFP_KERNEL); f0133f3c5b8bb34 Matt Fleming 2016-04-25 234 if (!sg_pages) f0133f3c5b8bb34 Matt Fleming 2016-04-25 235 return -ENOMEM; f0133f3c5b8bb34 Matt Fleming 2016-04-25 236 f0133f3c5b8bb34 Matt Fleming 2016-04-25 237 for (i = 0; i < sg_count; i++) { f0133f3c5b8bb34 Matt Fleming 2016-04-25 238 sg_pages[i] = alloc_page(GFP_KERNEL); f0133f3c5b8bb34 Matt Fleming 2016-04-25 239 if (!sg_pages[i]) { f0133f3c5b8bb34 Matt Fleming 2016-04-25 240 rv = -ENOMEM; f0133f3c5b8bb34 Matt Fleming 2016-04-25 241 goto out; f0133f3c5b8bb34 Matt Fleming 2016-04-25 242 } f0133f3c5b8bb34 Matt Fleming 2016-04-25 243 } f0133f3c5b8bb34 Matt Fleming 2016-04-25 244 f0133f3c5b8bb34 Matt Fleming 2016-04-25 245 for (i = 0; i < sg_count; i++) { f0133f3c5b8bb34 Matt Fleming 2016-04-25 246 efi_capsule_block_desc_t *sglist; f0133f3c5b8bb34 Matt Fleming 2016-04-25 247 91c1c092f27da41 Ard Biesheuvel 2020-12-07 248 sglist = kmap_atomic(sg_pages[i]); f0133f3c5b8bb34 Matt Fleming 2016-04-25 249 f0133f3c5b8bb34 Matt Fleming 2016-04-25 250 for (j = 0; j < SGLIST_PER_PAGE && count > 0; j++) { 2a457fb31df62c6 Ard Biesheuvel 2017-06-02 251 u64 sz = min_t(u64, imagesize, 2a457fb31df62c6 Ard Biesheuvel 2017-06-02 252 PAGE_SIZE - (u64)*pages % PAGE_SIZE); f0133f3c5b8bb34 Matt Fleming 2016-04-25 253 f0133f3c5b8bb34 Matt Fleming 2016-04-25 254 sglist[j].length = sz; 2a457fb31df62c6 Ard Biesheuvel 2017-06-02 255 sglist[j].data = *pages++; f0133f3c5b8bb34 Matt Fleming 2016-04-25 256 f0133f3c5b8bb34 Matt Fleming 2016-04-25 257 imagesize -= sz; f0133f3c5b8bb34 Matt Fleming 2016-04-25 258 count--; f0133f3c5b8bb34 Matt Fleming 2016-04-25 259 } f0133f3c5b8bb34 Matt Fleming 2016-04-25 260 f0133f3c5b8bb34 Matt Fleming 2016-04-25 261 /* Continuation pointer */ f0133f3c5b8bb34 Matt Fleming 2016-04-25 262 sglist[j].length = 0; f0133f3c5b8bb34 Matt Fleming 2016-04-25 263 f0133f3c5b8bb34 Matt Fleming 2016-04-25 264 if (i + 1 == sg_count) f0133f3c5b8bb34 Matt Fleming 2016-04-25 265 sglist[j].data = 0; f0133f3c5b8bb34 Matt Fleming 2016-04-25 266 else f0133f3c5b8bb34 Matt Fleming 2016-04-25 @267 sglist[j].data = page_to_phys(sg_pages[i + 1]); f0133f3c5b8bb34 Matt Fleming 2016-04-25 268 :::::: The code at line 172 was first introduced by commit :::::: f0133f3c5b8bb34ec4dec50c27e7a655aeee8935 efi: Add 'capsule' update support :::::: TO: Matt Fleming <m...@codeblueprint.co.uk> :::::: CC: Ingo Molnar <mi...@kernel.org> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
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