arch/riscv/mm/init.c:1204:48: sparse: sparse: cast truncates bits from constant value (100000000 becomes 0)

From: kernel test robot
Date: Wed Jun 07 2023 - 12:16:34 EST

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Hi Yimin,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: a4d7d701121981e3c3fe69ade376fe9f26324161
commit: b5e2c507b06c9d36411845149162a804ae7b04a9 riscv: Kconfig: Allow RV32 to build with no MMU
date: 2 months ago
config: riscv-randconfig-s051-20230607 (https://download.01.org/0day-ci/archive/20230608/202306080034.SLiCiOMn-lkp@xxxxxxxxx/config)
compiler: riscv32-linux-gcc (GCC) 12.3.0
reproduce:
mkdir -p ~/bin
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: v0.6.4-39-gce1a6720-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b5e2c507b06c9d36411845149162a804ae7b04a9
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout b5e2c507b06c9d36411845149162a804ae7b04a9
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=riscv olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=riscv SHELL=/bin/bash arch/riscv/mm/ drivers/char/

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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306080034.SLiCiOMn-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
WARNING: invalid argument to '-march': '_zihintpause'
>> arch/riscv/mm/init.c:1204:48: sparse: sparse: cast truncates bits from constant value (100000000 becomes 0)
--
WARNING: invalid argument to '-march': '_zihintpause'
drivers/char/random.c: note: in included file (through include/linux/timex.h, include/linux/time32.h, include/linux/time.h, ...):
>> arch/riscv/include/asm/timex.h:25:16: sparse: sparse: cast removes address space '__iomem' of expression
>> arch/riscv/include/asm/timex.h:25:16: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned int [usertype] * @@
arch/riscv/include/asm/timex.h:25:16: sparse: expected void const volatile [noderef] __iomem *addr
arch/riscv/include/asm/timex.h:25:16: sparse: got unsigned int [usertype] *
>> arch/riscv/include/asm/timex.h:25:16: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned int [usertype] * @@
arch/riscv/include/asm/timex.h:25:16: sparse: expected void const volatile [noderef] __iomem *addr
arch/riscv/include/asm/timex.h:25:16: sparse: got unsigned int [usertype] *
>> arch/riscv/include/asm/timex.h:25:16: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned int [usertype] * @@
arch/riscv/include/asm/timex.h:25:16: sparse: expected void const volatile [noderef] __iomem *addr
arch/riscv/include/asm/timex.h:25:16: sparse: got unsigned int [usertype] *
>> arch/riscv/include/asm/timex.h:25:16: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned int [usertype] * @@
arch/riscv/include/asm/timex.h:25:16: sparse: expected void const volatile [noderef] __iomem *addr
arch/riscv/include/asm/timex.h:25:16: sparse: got unsigned int [usertype] *
>> arch/riscv/include/asm/timex.h:25:16: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned int [usertype] * @@
arch/riscv/include/asm/timex.h:25:16: sparse: expected void const volatile [noderef] __iomem *addr
arch/riscv/include/asm/timex.h:25:16: sparse: got unsigned int [usertype] *
>> arch/riscv/include/asm/timex.h:25:16: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned int [usertype] * @@
arch/riscv/include/asm/timex.h:25:16: sparse: expected void const volatile [noderef] __iomem *addr
arch/riscv/include/asm/timex.h:25:16: sparse: got unsigned int [usertype] *
>> arch/riscv/include/asm/timex.h:25:16: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned int [usertype] * @@
arch/riscv/include/asm/timex.h:25:16: sparse: expected void const volatile [noderef] __iomem *addr
arch/riscv/include/asm/timex.h:25:16: sparse: got unsigned int [usertype] *
>> arch/riscv/include/asm/timex.h:25:16: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned int [usertype] * @@
arch/riscv/include/asm/timex.h:25:16: sparse: expected void const volatile [noderef] __iomem *addr
arch/riscv/include/asm/timex.h:25:16: sparse: got unsigned int [usertype] *
>> arch/riscv/include/asm/timex.h:25:16: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned int [usertype] * @@
arch/riscv/include/asm/timex.h:25:16: sparse: expected void const volatile [noderef] __iomem *addr
arch/riscv/include/asm/timex.h:25:16: sparse: got unsigned int [usertype] *
>> arch/riscv/include/asm/timex.h:25:16: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned int [usertype] * @@
arch/riscv/include/asm/timex.h:25:16: sparse: expected void const volatile [noderef] __iomem *addr
arch/riscv/include/asm/timex.h:25:16: sparse: got unsigned int [usertype] *

vim +1204 arch/riscv/mm/init.c

671f9a3e2e24cd Anup Patel 2019-06-28 1154
e53d28180d4d0f Nick Kossifidis 2021-04-19 1155 /*
e53d28180d4d0f Nick Kossifidis 2021-04-19 1156 * reserve_crashkernel() - reserves memory for crash kernel
e53d28180d4d0f Nick Kossifidis 2021-04-19 1157 *
e53d28180d4d0f Nick Kossifidis 2021-04-19 1158 * This function reserves memory area given in "crashkernel=" kernel command
e53d28180d4d0f Nick Kossifidis 2021-04-19 1159 * line parameter. The memory reserved is used by dump capture kernel when
e53d28180d4d0f Nick Kossifidis 2021-04-19 1160 * primary kernel is crashing.
e53d28180d4d0f Nick Kossifidis 2021-04-19 1161 */
e53d28180d4d0f Nick Kossifidis 2021-04-19 1162 static void __init reserve_crashkernel(void)
e53d28180d4d0f Nick Kossifidis 2021-04-19 1163 {
e53d28180d4d0f Nick Kossifidis 2021-04-19 1164 unsigned long long crash_base = 0;
e53d28180d4d0f Nick Kossifidis 2021-04-19 1165 unsigned long long crash_size = 0;
e53d28180d4d0f Nick Kossifidis 2021-04-19 1166 unsigned long search_start = memblock_start_of_DRAM();
e53d28180d4d0f Nick Kossifidis 2021-04-19 1167 unsigned long search_end = memblock_end_of_DRAM();
e53d28180d4d0f Nick Kossifidis 2021-04-19 1168
e53d28180d4d0f Nick Kossifidis 2021-04-19 1169 int ret = 0;
e53d28180d4d0f Nick Kossifidis 2021-04-19 1170
d414cb379ac35e Jisheng Zhang 2022-03-23 1171 if (!IS_ENABLED(CONFIG_KEXEC_CORE))
d414cb379ac35e Jisheng Zhang 2022-03-23 1172 return;
5640975003d023 Nick Kossifidis 2021-04-19 1173 /*
5640975003d023 Nick Kossifidis 2021-04-19 1174 * Don't reserve a region for a crash kernel on a crash kernel
5640975003d023 Nick Kossifidis 2021-04-19 1175 * since it doesn't make much sense and we have limited memory
5640975003d023 Nick Kossifidis 2021-04-19 1176 * resources.
5640975003d023 Nick Kossifidis 2021-04-19 1177 */
5640975003d023 Nick Kossifidis 2021-04-19 1178 if (is_kdump_kernel()) {
5640975003d023 Nick Kossifidis 2021-04-19 1179 pr_info("crashkernel: ignoring reservation request\n");
5640975003d023 Nick Kossifidis 2021-04-19 1180 return;
5640975003d023 Nick Kossifidis 2021-04-19 1181 }
5640975003d023 Nick Kossifidis 2021-04-19 1182
e53d28180d4d0f Nick Kossifidis 2021-04-19 1183 ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
e53d28180d4d0f Nick Kossifidis 2021-04-19 1184 &crash_size, &crash_base);
e53d28180d4d0f Nick Kossifidis 2021-04-19 1185 if (ret || !crash_size)
e53d28180d4d0f Nick Kossifidis 2021-04-19 1186 return;
e53d28180d4d0f Nick Kossifidis 2021-04-19 1187
e53d28180d4d0f Nick Kossifidis 2021-04-19 1188 crash_size = PAGE_ALIGN(crash_size);
e53d28180d4d0f Nick Kossifidis 2021-04-19 1189
a7259df7670240 Mike Rapoport 2021-09-02 1190 if (crash_base) {
a7259df7670240 Mike Rapoport 2021-09-02 1191 search_start = crash_base;
a7259df7670240 Mike Rapoport 2021-09-02 1192 search_end = crash_base + crash_size;
a7259df7670240 Mike Rapoport 2021-09-02 1193 }
a7259df7670240 Mike Rapoport 2021-09-02 1194
e53d28180d4d0f Nick Kossifidis 2021-04-19 1195 /*
e53d28180d4d0f Nick Kossifidis 2021-04-19 1196 * Current riscv boot protocol requires 2MB alignment for
e53d28180d4d0f Nick Kossifidis 2021-04-19 1197 * RV64 and 4MB alignment for RV32 (hugepage size)
decf89f86ecd3c Nick Kossifidis 2021-11-26 1198 *
decf89f86ecd3c Nick Kossifidis 2021-11-26 1199 * Try to alloc from 32bit addressible physical memory so that
decf89f86ecd3c Nick Kossifidis 2021-11-26 1200 * swiotlb can work on the crash kernel.
e53d28180d4d0f Nick Kossifidis 2021-04-19 1201 */
decf89f86ecd3c Nick Kossifidis 2021-11-26 1202 crash_base = memblock_phys_alloc_range(crash_size, PMD_SIZE,
decf89f86ecd3c Nick Kossifidis 2021-11-26 1203 search_start,
decf89f86ecd3c Nick Kossifidis 2021-11-26 @1204 min(search_end, (unsigned long) SZ_4G));
decf89f86ecd3c Nick Kossifidis 2021-11-26 1205 if (crash_base == 0) {
decf89f86ecd3c Nick Kossifidis 2021-11-26 1206 /* Try again without restricting region to 32bit addressible memory */
a7259df7670240 Mike Rapoport 2021-09-02 1207 crash_base = memblock_phys_alloc_range(crash_size, PMD_SIZE,
a7259df7670240 Mike Rapoport 2021-09-02 1208 search_start, search_end);
e53d28180d4d0f Nick Kossifidis 2021-04-19 1209 if (crash_base == 0) {
e53d28180d4d0f Nick Kossifidis 2021-04-19 1210 pr_warn("crashkernel: couldn't allocate %lldKB\n",
e53d28180d4d0f Nick Kossifidis 2021-04-19 1211 crash_size >> 10);
e53d28180d4d0f Nick Kossifidis 2021-04-19 1212 return;
e53d28180d4d0f Nick Kossifidis 2021-04-19 1213 }
decf89f86ecd3c Nick Kossifidis 2021-11-26 1214 }
e53d28180d4d0f Nick Kossifidis 2021-04-19 1215
e53d28180d4d0f Nick Kossifidis 2021-04-19 1216 pr_info("crashkernel: reserved 0x%016llx - 0x%016llx (%lld MB)\n",
e53d28180d4d0f Nick Kossifidis 2021-04-19 1217 crash_base, crash_base + crash_size, crash_size >> 20);
e53d28180d4d0f Nick Kossifidis 2021-04-19 1218
e53d28180d4d0f Nick Kossifidis 2021-04-19 1219 crashk_res.start = crash_base;
e53d28180d4d0f Nick Kossifidis 2021-04-19 1220 crashk_res.end = crash_base + crash_size - 1;
e53d28180d4d0f Nick Kossifidis 2021-04-19 1221 }
e53d28180d4d0f Nick Kossifidis 2021-04-19 1222

:::::: The code at line 1204 was first introduced by commit
:::::: decf89f86ecd3c3c3de81c562010d5797bea3de1 riscv: try to allocate crashkern region from 32bit addressible memory

:::::: TO: Nick Kossifidis <mick@xxxxxxxxxxxx>
:::::: CC: Palmer Dabbelt <palmer@xxxxxxxxxxxx>

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Next message: Stefan Berger: "[PATCH] tpm: Check for availability of chip->ops before requesting locality"
Previous message: Roberto Sassu: "[PATCH] shmem: Use ramfs_kill_sb() for kill_sb method of ramfs-based tmpfs"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]