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Message-ID: <202103111645.ROUrqFfr-lkp@intel.com>
Date: Thu, 11 Mar 2021 16:15:52 +0800
From: kernel test robot <lkp@...el.com>
To: Sudeep Holla <sudeep.holla@....com>
Cc: kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
linux-kernel@...r.kernel.org
Subject: drivers/firmware/arm_scmi/smc.c:113:2: error: write to reserved
register 'R7'
Hi Sudeep,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: a74e6a014c9d4d4161061f770c9b4f98372ac778
commit: 66d90f6ecee755e9c19a119c9255e80091165498 firmware: arm_scmi: Enable building as a single module
date: 6 months ago
config: arm-randconfig-r005-20210311 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 574a9dabc63ba1e7a04c08d4bde2eacd61b44ce1)
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 arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=66d90f6ecee755e9c19a119c9255e80091165498
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 66d90f6ecee755e9c19a119c9255e80091165498
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
>> drivers/firmware/arm_scmi/smc.c:113:2: error: write to reserved register 'R7'
arm_smccc_1_1_invoke(scmi_info->func_id, 0, 0, 0, 0, 0, 0, 0, &res);
^
include/linux/arm-smccc.h:396:4: note: expanded from macro 'arm_smccc_1_1_invoke'
arm_smccc_1_1_smc(__VA_ARGS__); \
^
include/linux/arm-smccc.h:343:48: note: expanded from macro 'arm_smccc_1_1_smc'
#define arm_smccc_1_1_smc(...) __arm_smccc_1_1(SMCCC_SMC_INST, __VA_ARGS__)
^
include/linux/arm-smccc.h:220:24: note: expanded from macro 'SMCCC_SMC_INST'
#define SMCCC_SMC_INST __SMC(0)
^
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm/include/asm/opcodes.h:210:2: note: expanded from macro '__inst_arm_thumb32'
__inst_thumb32(thumb_opcode)
^
arch/arm/include/asm/opcodes.h:200:27: note: expanded from macro '__inst_thumb32'
#define __inst_thumb32(x) ___inst_thumb32( \
^
arch/arm/include/asm/opcodes.h:225:2: note: expanded from macro '___inst_thumb32'
".short " __stringify(first) ", " __stringify(second) "\n\t"
^
>> drivers/firmware/arm_scmi/smc.c:113:2: error: write to reserved register 'R7'
include/linux/arm-smccc.h:393:4: note: expanded from macro 'arm_smccc_1_1_invoke'
arm_smccc_1_1_hvc(__VA_ARGS__); \
^
include/linux/arm-smccc.h:359:48: 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:221:24: note: expanded from macro 'SMCCC_HVC_INST'
#define SMCCC_HVC_INST __HVC(0)
^
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm/include/asm/opcodes.h:210:2: note: expanded from macro '__inst_arm_thumb32'
__inst_thumb32(thumb_opcode)
^
arch/arm/include/asm/opcodes.h:200:27: note: expanded from macro '__inst_thumb32'
#define __inst_thumb32(x) ___inst_thumb32( \
^
arch/arm/include/asm/opcodes.h:225:2: note: expanded from macro '___inst_thumb32'
".short " __stringify(first) ", " __stringify(second) "\n\t"
^
>> drivers/firmware/arm_scmi/smc.c:113:2: error: write to reserved register 'R7'
include/linux/arm-smccc.h:399:4: note: expanded from macro 'arm_smccc_1_1_invoke'
__fail_smccc_1_1(__VA_ARGS__); \
^
include/linux/arm-smccc.h:369:8: note: expanded from macro '__fail_smccc_1_1'
asm ("" __constraints(__count_args(__VA_ARGS__))); \
^
3 errors generated.
vim +/R7 +113 drivers/firmware/arm_scmi/smc.c
1dc6558062dadf Peng Fan 2020-03-08 102
1dc6558062dadf Peng Fan 2020-03-08 103 static int smc_send_message(struct scmi_chan_info *cinfo,
1dc6558062dadf Peng Fan 2020-03-08 104 struct scmi_xfer *xfer)
1dc6558062dadf Peng Fan 2020-03-08 105 {
1dc6558062dadf Peng Fan 2020-03-08 106 struct scmi_smc *scmi_info = cinfo->transport_info;
1dc6558062dadf Peng Fan 2020-03-08 107 struct arm_smccc_res res;
1dc6558062dadf Peng Fan 2020-03-08 108
18988265b87615 Sudeep Holla 2020-03-27 109 mutex_lock(&scmi_info->shmem_lock);
1dc6558062dadf Peng Fan 2020-03-08 110
1dc6558062dadf Peng Fan 2020-03-08 111 shmem_tx_prepare(scmi_info->shmem, xfer);
1dc6558062dadf Peng Fan 2020-03-08 112
1dc6558062dadf Peng Fan 2020-03-08 @113 arm_smccc_1_1_invoke(scmi_info->func_id, 0, 0, 0, 0, 0, 0, 0, &res);
1dc6558062dadf Peng Fan 2020-03-08 114 scmi_rx_callback(scmi_info->cinfo, shmem_read_header(scmi_info->shmem));
1dc6558062dadf Peng Fan 2020-03-08 115
18988265b87615 Sudeep Holla 2020-03-27 116 mutex_unlock(&scmi_info->shmem_lock);
1dc6558062dadf Peng Fan 2020-03-08 117
f7199cf489027a Sudeep Holla 2020-04-17 118 /* Only SMCCC_RET_NOT_SUPPORTED is valid error code */
f7199cf489027a Sudeep Holla 2020-04-17 119 if (res.a0)
f7199cf489027a Sudeep Holla 2020-04-17 120 return -EOPNOTSUPP;
f7199cf489027a Sudeep Holla 2020-04-17 121 return 0;
1dc6558062dadf Peng Fan 2020-03-08 122 }
1dc6558062dadf Peng Fan 2020-03-08 123
:::::: The code at line 113 was first introduced by commit
:::::: 1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 firmware: arm_scmi: Add smc/hvc transport
:::::: TO: Peng Fan <peng.fan@....com>
:::::: CC: Sudeep Holla <sudeep.holla@....com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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