Re: [PATCH V5 2/8] remoteproc: add is_iomem to da_to_va

kernel test robot
2020-12-30T15:15:58Z

[-- Attachment #1: Type: text/plain, Size: 7231 bytes --]

Hi,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.11-rc1 next-20201223]
[cannot apply to soc/for-next xlnx/master remoteproc/for-next rpmsg/for-next]
[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]

url: https://github.com/0day-ci/linux/commits/peng-fan-nxp-com/remoteproc-imx_rproc-support-iMX8MQ-M/20201229-110725
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git dea8dcf2a9fa8cc540136a6cd885c3beece16ec3
config: powerpc64-randconfig-s032-20201230 (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 9.3.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.3-184-g1b896707-dirty
# https://github.com/0day-ci/linux/commit/f2054bc05d3b183ef0b0ff0b4c802ba53680a5af
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review peng-fan-nxp-com/remoteproc-imx_rproc-support-iMX8MQ-M/20201229-110725
git checkout f2054bc05d3b183ef0b0ff0b4c802ba53680a5af
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=powerpc64

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

"sparse warnings: (new ones prefixed by >>)"
>> drivers/remoteproc/remoteproc_elf_loader.c:219:61: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const volatile [noderef] __iomem *s @@ got unsigned char const [usertype] * @@
drivers/remoteproc/remoteproc_elf_loader.c:219:61: sparse: expected void const volatile [noderef] __iomem *s
drivers/remoteproc/remoteproc_elf_loader.c:219:61: sparse: got unsigned char const [usertype] *
>> drivers/remoteproc/remoteproc_elf_loader.c:233:47: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void volatile [noderef] __iomem *a @@ got void * @@
drivers/remoteproc/remoteproc_elf_loader.c:233:47: sparse: expected void volatile [noderef] __iomem *a
drivers/remoteproc/remoteproc_elf_loader.c:233:47: sparse: got void *
--
>> drivers/remoteproc/remoteproc_coredump.c:169:53: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const volatile [noderef] __iomem *s @@ got void *[assigned] ptr @@
drivers/remoteproc/remoteproc_coredump.c:169:53: sparse: expected void const volatile [noderef] __iomem *s
drivers/remoteproc/remoteproc_coredump.c:169:53: sparse: got void *[assigned] ptr

vim +219 drivers/remoteproc/remoteproc_elf_loader.c

131
132 /**
133 * rproc_elf_load_segments() - load firmware segments to memory
134 * @rproc: remote processor which will be booted using these fw segments
135 * @fw: the ELF firmware image
136 *
137 * This function loads the firmware segments to memory, where the remote
138 * processor expects them.
139 *
140 * Some remote processors will expect their code and data to be placed
141 * in specific device addresses, and can't have them dynamically assigned.
142 *
143 * We currently support only those kind of remote processors, and expect
144 * the program header's paddr member to contain those addresses. We then go
145 * through the physically contiguous "carveout" memory regions which we
146 * allocated (and mapped) earlier on behalf of the remote processor,
147 * and "translate" device address to kernel addresses, so we can copy the
148 * segments where they are expected.
149 *
150 * Currently we only support remote processors that required carveout
151 * allocations and got them mapped onto their iommus. Some processors
152 * might be different: they might not have iommus, and would prefer to
153 * directly allocate memory for every segment/resource. This is not yet
154 * supported, though.
155 */
156 int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
157 {
158 struct device *dev = &rproc->dev;
159 const void *ehdr, *phdr;
160 int i, ret = 0;
161 u16 phnum;
162 const u8 *elf_data = fw->data;
163 u8 class = fw_elf_get_class(fw);
164 u32 elf_phdr_get_size = elf_size_of_phdr(class);
165
166 ehdr = elf_data;
167 phnum = elf_hdr_get_e_phnum(class, ehdr);
168 phdr = elf_data + elf_hdr_get_e_phoff(class, ehdr);
169
170 /* go through the available ELF segments */
171 for (i = 0; i < phnum; i++, phdr += elf_phdr_get_size) {
172 u64 da = elf_phdr_get_p_paddr(class, phdr);
173 u64 memsz = elf_phdr_get_p_memsz(class, phdr);
174 u64 filesz = elf_phdr_get_p_filesz(class, phdr);
175 u64 offset = elf_phdr_get_p_offset(class, phdr);
176 u32 type = elf_phdr_get_p_type(class, phdr);
177 void *ptr;
178 bool is_iomem;
179
180 if (type != PT_LOAD)
181 continue;
182
183 dev_dbg(dev, "phdr: type %d da 0x%llx memsz 0x%llx filesz 0x%llx\n",
184 type, da, memsz, filesz);
185
186 if (filesz > memsz) {
187 dev_err(dev, "bad phdr filesz 0x%llx memsz 0x%llx\n",
188 filesz, memsz);
189 ret = -EINVAL;
190 break;
191 }
192
193 if (offset + filesz > fw->size) {
194 dev_err(dev, "truncated fw: need 0x%llx avail 0x%zx\n",
195 offset + filesz, fw->size);
196 ret = -EINVAL;
197 break;
198 }
199
200 if (!rproc_u64_fit_in_size_t(memsz)) {
201 dev_err(dev, "size (%llx) does not fit in size_t type\n",
202 memsz);
203 ret = -EOVERFLOW;
204 break;
205 }
206
207 /* grab the kernel address for this device address */
208 ptr = rproc_da_to_va(rproc, da, memsz, &is_iomem);
209 if (!ptr) {
210 dev_err(dev, "bad phdr da 0x%llx mem 0x%llx\n", da,
211 memsz);
212 ret = -EINVAL;
213 break;
214 }
215
216 /* put the segment where the remote processor expects it */
217 if (filesz) {
218 if (is_iomem)
> 219 memcpy_fromio(ptr, elf_data + offset, filesz);
220 else
221 memcpy(ptr, elf_data + offset, filesz);
222 }
223
224 /*
225 * Zero out remaining memory for this segment.
226 *
227 * This isn't strictly required since dma_alloc_coherent already
228 * did this for us. albeit harmless, we may consider removing
229 * this.
230 */
231 if (memsz > filesz) {
232 if (is_iomem)
> 233 memset_io(ptr + filesz, 0, memsz - filesz);
234 else
235 memset(ptr + filesz, 0, memsz - filesz);
236 }
237 }
238
239 return ret;
240 }
241 EXPORT_SYMBOL(rproc_elf_load_segments);
242

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

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 36269 bytes --]