REQUEST: Syncing tools/arch/arm64/include/asm/cputype.h with the kernel sources

Arnaldo Carvalho de Melo
2026-03-15T13:43:07Z

Hi,

Can someone please address this perf build warning:

make: Entering directory '/home/acme/git/perf-tools/tools/perf'
BUILD: Doing 'make -j32' parallel build
Warning: Kernel ABI header differences:
diff -u tools/arch/arm64/include/asm/cputype.h arch/arm64/include/asm/cputype.h

I tried updating that header and got the problems below.

I just merged perf-tools with upstream, will push to tmp.perf-tools at:

https://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools.git tmp.perf-tools

Thanks in advance,

- Arnaldo

⬢ [acme@toolbx perf-tools]$ git diff
diff --git a/tools/arch/arm64/include/asm/cputype.h b/tools/arch/arm64/include/asm/cputype.h
index 9b73c1aa3ad747ec..08860d482e60009f 100644
--- a/tools/arch/arm64/include/asm/cputype.h
+++ b/tools/arch/arm64/include/asm/cputype.h
@@ -255,6 +255,16 @@

#define read_cpuid(reg) read_sysreg_s(SYS_ ## reg)

+/*
+ * The CPU ID never changes at run time, so we might as well tell the
+ * compiler that it's constant. Use this function to read the CPU ID
+ * rather than directly reading processor_id or read_cpuid() directly.
+ */
+static inline u32 __attribute_const__ read_cpuid_id(void)
+{
+ return read_cpuid(MIDR_EL1);
+}
+
/*
* Represent a range of MIDR values for a given CPU model and a
* range of variant/revision values.
@@ -290,31 +300,6 @@ static inline bool midr_is_cpu_model_range(u32 midr, u32 model, u32 rv_min,
return _model == model && rv >= rv_min && rv <= rv_max;
}

-static inline bool is_midr_in_range(u32 midr, struct midr_range const *range)
-{
- return midr_is_cpu_model_range(midr, range->model,
- range->rv_min, range->rv_max);
-}
-
-static inline bool
-is_midr_in_range_list(u32 midr, struct midr_range const *ranges)
-{
- while (ranges->model)
- if (is_midr_in_range(midr, ranges++))
- return true;
- return false;
⬢ [acme@toolbx perf-tools]$ m
make: Entering directory '/home/acme/git/perf-tools/tools/perf'
BUILD: Doing 'make -j32' parallel build
Warning: Kernel ABI header differences:
diff -u tools/arch/x86/include/asm/msr-index.h arch/x86/include/asm/msr-index.h
diff -u tools/arch/x86/include/uapi/asm/svm.h arch/x86/include/uapi/asm/svm.h

Auto-detecting system features:
... libdw: [ on ]
... glibc: [ on ]
... libelf: [ on ]
... libnuma: [ on ]
... numa_num_possible_cpus: [ on ]
... libpython: [ on ]
... libcapstone: [ on ]
... llvm-perf: [ on ]
... zlib: [ on ]
... lzma: [ on ]
... bpf: [ on ]
... libaio: [ on ]
... libzstd: [ on ]
... libopenssl: [ on ]
... rust: [ on ]

INSTALL libsubcmd_headers
INSTALL libapi_headers
INSTALL libperf_headers
INSTALL libsymbol_headers
INSTALL libbpf_headers
CC /tmp/build/perf-tools/util/arm-spe.o
util/arm-spe.c: In function ‘arm_spe__synth_ds’:
util/arm-spe.c:986:43: error: passing argument 1 of ‘is_midr_in_range_list’ makes pointer from integer without a cast [-Wint-conversion]
986 | if (is_midr_in_range_list(midr, data_source_handles[i].midr_ranges)) {
| ^~~~
| |
| u64 {aka long unsigned int}
In file included from util/arm-spe.c:37:
util/../../arch/arm64/include/asm/cputype.h:310:53: note: expected ‘const struct midr_range *’ but argument is of type ‘u64’ {aka ‘long unsigned int’}
310 | bool is_midr_in_range_list(struct midr_range const *ranges);
| ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
util/arm-spe.c:986:21: error: too many arguments to function ‘is_midr_in_range_list’; expected 1, have 2
986 | if (is_midr_in_range_list(midr, data_source_handles[i].midr_ranges)) {
| ^~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
util/../../arch/arm64/include/asm/cputype.h:310:6: note: declared here
310 | bool is_midr_in_range_list(struct midr_range const *ranges);
| ^~~~~~~~~~~~~~~~~~~~~
make[4]: *** [/home/acme/git/perf-tools/tools/build/Makefile.build:95: /tmp/build/perf-tools/util/arm-spe.o] Error 1
make[3]: *** [/home/acme/git/perf-tools/tools/build/Makefile.build:158: util] Error 2
make[2]: *** [Makefile.perf:797: /tmp/build/perf-tools/perf-util-in.o] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [Makefile.perf:289: sub-make] Error 2
make: *** [Makefile:119: install-bin] Error 2
make: Leaving directory '/home/acme/git/perf-tools/tools/perf'
⬢ [acme@toolbx perf-tools]$