Re: [PATCH v2 3/3] firmware: arm_scmi: Add qcom hvc/shmem transport

Re: [PATCH v2 3/3] firmware: arm_scmi: Add qcom hvc/shmem transport

[kernel test robot]

Hi Nikunj,

kernel test robot noticed the following build errors:

[auto build test ERROR on robh/for-next]
[also build test ERROR on linus/master v6.5-rc4 next-20230801]
[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/Nikunj-Kela/dt-bindings-arm-convert-nested-if-else-construct-to-allOf/20230725-004613
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20230724164419.16092-4-quic_nkela%40quicinc.com
patch subject: [PATCH v2 3/3] firmware: arm_scmi: Add qcom hvc/shmem transport
config: arm-randconfig-r004-20230731 (https://download.01.org/0day-ci/archive/20230801/202308011516.voJRAbHr-lkp@intel.com/config)
compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project.git 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a)
reproduce: (https://download.01.org/0day-ci/archive/20230801/202308011516.voJRAbHr-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/202308011516.voJRAbHr-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/firmware/arm_scmi/qcom_hvc.c:182:2: error: write to reserved register 'R7'
           arm_smccc_1_1_hvc(scmi_info->func_id, (unsigned long)scmi_info->cap_id,
           ^
   include/linux/arm-smccc.h:536:48: note: expanded from macro 'arm_smccc_1_1_hvc'
   #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
                                                   ^
   include/linux/arm-smccc.h:398:24: note: expanded from macro 'SMCCC_HVC_INST'
   #define SMCCC_HVC_INST  __HVC(0)
                           ^
   arch/arm/include/asm/opcodes-virt.h:11:22: note: expanded from macro '__HVC'
   #define __HVC(imm16) __inst_arm_thumb32(                                \
                        ^
   arch/arm/include/asm/opcodes.h:215:2: note: expanded from macro '__inst_arm_thumb32'
           __inst_thumb32(thumb_opcode)
           ^
   arch/arm/include/asm/opcodes.h:205:27: note: expanded from macro '__inst_thumb32'
   #define __inst_thumb32(x) ___inst_thumb32(                              \
                             ^
   arch/arm/include/asm/opcodes.h:230:2: note: expanded from macro '___inst_thumb32'
           ".short " __stringify(first) ", " __stringify(second) "\n\t"
           ^
   1 error generated.


vim +/R7 +182 drivers/firmware/arm_scmi/qcom_hvc.c

   167	
   168	static int qcom_hvc_send_message(struct scmi_chan_info *cinfo,
   169					 struct scmi_xfer *xfer)
   170	{
   171		struct scmi_qcom_hvc *scmi_info = cinfo->transport_info;
   172		struct arm_smccc_res res;
   173	
   174		/*
   175		 * Channel will be released only once response has been
   176		 * surely fully retrieved, so after .mark_txdone()
   177		 */
   178		mutex_lock(&scmi_info->shmem_lock);
   179	
   180		shmem_tx_prepare(scmi_info->shmem, xfer, cinfo);
   181	
 > 182		arm_smccc_1_1_hvc(scmi_info->func_id, (unsigned long)scmi_info->cap_id,
   183				  0, 0, 0, 0, 0, 0, &res);
   184	
   185		if (res.a0) {
   186			mutex_unlock(&scmi_info->shmem_lock);
   187			return -EOPNOTSUPP;
   188		}
   189	
   190		return 0;
   191	}
   192	

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