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Date: Tue, 13 Sep 2022 16:50:15 +0800
From: kernel test robot <lkp@...el.com>
To: Gokul krishna Krishnakumar <quic_gokukris@...cinc.com>,
Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...ainline.org>,
Philipp Zabel <p.zabel@...gutronix.de>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
Trilok Soni <quic_tsoni@...cinc.com>,
Satya Durga Srinivasu Prabhala <quic_satyap@...cinc.com>,
Rajendra Nayak <quic_rjendra@...cinc.com>,
Elliot Berman <quic_eberman@...cinc.com>,
Guru Das Srinagesh <quic_gurus@...cinc.com>,
Gokul krishna Krishnakumar <quic_gokukris@...cinc.com>
Subject: Re: [PATCH v1 2/2] soc: qcom: mdt_loader: Move the memory allocation
into mdt loader
Hi Gokul,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on remoteproc/rproc-next]
[also build test ERROR on linus/master v6.0-rc5 next-20220912]
[cannot apply to pza/reset/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#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Gokul-krishna-Krishnakumar/Memory-allocation-change-in-scm-mdt_loader/20220913-024309
base: git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux.git rproc-next
config: arm64-randconfig-r003-20220911
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 1546df49f5a6d09df78f569e4137ddb365a3e827)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# https://github.com/intel-lab-lkp/linux/commit/93615f3d80d56bd470c334e2055f86bea3e53c25
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Gokul-krishna-Krishnakumar/Memory-allocation-change-in-scm-mdt_loader/20220913-024309
git checkout 93615f3d80d56bd470c334e2055f86bea3e53c25
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/soc/qcom/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
>> drivers/soc/qcom/mdt_loader.c:172:12: error: call to undeclared function 'qcom_get_scm_device'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
scm_dev = qcom_get_scm_device();
^
>> drivers/soc/qcom/mdt_loader.c:172:10: error: incompatible integer to pointer conversion assigning to 'struct device *' from 'int' [-Wint-conversion]
scm_dev = qcom_get_scm_device();
^ ~~~~~~~~~~~~~~~~~~~~~
>> drivers/soc/qcom/mdt_loader.c:195:60: error: incompatible pointer to integer conversion passing 'dma_addr_t *' (aka 'unsigned long long *') to parameter of type 'dma_addr_t' (aka 'unsigned long long'); dereference with * [-Wint-conversion]
dma_free_coherent(scm_dev, ehdr_size + hash_size, data, mdata_phys);
^~~~~~~~~~
*
include/linux/dma-mapping.h:433:30: note: passing argument to parameter 'dma_handle' here
void *cpu_addr, dma_addr_t dma_handle)
^
3 errors generated.
vim +/qcom_get_scm_device +172 drivers/soc/qcom/mdt_loader.c
107
108 /**
109 * qcom_mdt_read_metadata() - read header and metadata from mdt or mbn
110 * @fw: firmware of mdt header or mbn
111 * @data_len: length of the read metadata blob
112 * @fw_name: name of the firmware, for construction of segment file names
113 * @dev: device handle to associate resources with
114 * @mdata_phys: phys address for the assigned metadata buffer
115 *
116 * The mechanism that performs the authentication of the loading firmware
117 * expects an ELF header directly followed by the segment of hashes, with no
118 * padding inbetween. This function allocates a chunk of memory for this pair
119 * and copy the two pieces into the buffer.
120 *
121 * In the case of split firmware the hash is found directly following the ELF
122 * header, rather than at p_offset described by the second program header.
123 *
124 * The caller is responsible to free (kfree()) the returned pointer.
125 *
126 * Return: pointer to data, or ERR_PTR()
127 */
128 void *qcom_mdt_read_metadata(const struct firmware *fw, size_t *data_len,
129 const char *fw_name, struct device *dev,
130 dma_addr_t *mdata_phys)
131 {
132 const struct elf32_phdr *phdrs;
133 const struct elf32_hdr *ehdr;
134 unsigned int hash_segment = 0;
135 struct device *scm_dev = NULL;
136 size_t hash_offset;
137 size_t hash_size;
138 size_t ehdr_size;
139 unsigned int i;
140 ssize_t ret;
141 void *data;
142
143 ehdr = (struct elf32_hdr *)fw->data;
144 phdrs = (struct elf32_phdr *)(ehdr + 1);
145
146 if (ehdr->e_phnum < 2)
147 return ERR_PTR(-EINVAL);
148
149 if (phdrs[0].p_type == PT_LOAD)
150 return ERR_PTR(-EINVAL);
151
152 for (i = 1; i < ehdr->e_phnum; i++) {
153 if ((phdrs[i].p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH) {
154 hash_segment = i;
155 break;
156 }
157 }
158
159 if (!hash_segment) {
160 dev_err(dev, "no hash segment found in %s\n", fw_name);
161 return ERR_PTR(-EINVAL);
162 }
163
164 ehdr_size = phdrs[0].p_filesz;
165 hash_size = phdrs[hash_segment].p_filesz;
166
167 /*
168 * During the scm call memory protection will be enabled for the meta
169 * data blob, so make sure it's physically contiguous, 4K aligned and
170 * non-cachable to avoid XPU violations.
171 */
> 172 scm_dev = qcom_get_scm_device();
173 data = dma_alloc_coherent(scm_dev, ehdr_size + hash_size, mdata_phys,
174 GFP_KERNEL);
175 if (!data) {
176 dev_err(dev, "Allocation of metadata buffer failed.\n");
177 return NULL;
178 }
179
180 /* Copy ELF header */
181 memcpy(data, fw->data, ehdr_size);
182
183 if (ehdr_size + hash_size == fw->size) {
184 /* Firmware is split and hash is packed following the ELF header */
185 hash_offset = phdrs[0].p_filesz;
186 memcpy(data + ehdr_size, fw->data + hash_offset, hash_size);
187 } else if (phdrs[hash_segment].p_offset + hash_size <= fw->size) {
188 /* Hash is in its own segment, but within the loaded file */
189 hash_offset = phdrs[hash_segment].p_offset;
190 memcpy(data + ehdr_size, fw->data + hash_offset, hash_size);
191 } else {
192 /* Hash is in its own segment, beyond the loaded file */
193 ret = mdt_load_split_segment(data + ehdr_size, phdrs, hash_segment, fw_name, dev);
194 if (ret) {
> 195 dma_free_coherent(scm_dev, ehdr_size + hash_size, data, mdata_phys);
196 return ERR_PTR(ret);
197 }
198 }
199
200 *data_len = ehdr_size + hash_size;
201
202 return data;
203 }
204 EXPORT_SYMBOL_GPL(qcom_mdt_read_metadata);
205
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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