perf regs: Remove __weak attributive arch__xxx_reg_mask() functions

Currently, some architecture-specific perf-regs functions, such as
arch__intr_reg_mask() and arch__user_reg_mask(), are defined with the
__weak attribute.

This approach ensures that only functions matching the architecture of
the build/run host are compiled and executed, reducing build time and
binary size.

However, this __weak attribute restricts these functions to be called
only on the same architecture, preventing cross-architecture
functionality.

For example, a perf.data file captured on x86 cannot be parsed on an ARM
platform.

To address this limitation, this patch removes the __weak attribute from
these perf-regs functions.

The architecture-specific code is moved from the arch/ directory to the
util/perf-regs-arch/ directory.

The appropriate architectural functions are then called based on the
EM_HOST.

No functional changes are intended.

Suggested-by: Ian Rogers <irogers@google.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Guo Ren <guoren@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <pjw@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Falcon <thomas.falcon@intel.com>
Cc: Will Deacon <will@kernel.org>
Cc: Xudong Hao <xudong.hao@intel.com>
Cc: Zide Chen <zide.chen@intel.com>
[ Fixed up somme fuzz with s390 and riscv Build files wrt removing perf_regs.o ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 0 insertions, 47 deletions

diff --git a/tools/perf/arch/powerpc/util/perf_regs.c b/tools/perf/arch/powerpc/util/perf_regs.c
index 779073f7e992..93f929fc32e3 100644
--- a/tools/perf/arch/powerpc/util/perf_regs.c
+++ b/tools/perf/arch/powerpc/util/perf_regs.c
@@ -123,50 +123,3 @@ int arch_sdt_arg_parse_op(char *old_op, char **new_op)
 
 	return SDT_ARG_VALID;
 }
-
-uint64_t arch__intr_reg_mask(void)
-{
-	struct perf_event_attr attr = {
-		.type                   = PERF_TYPE_HARDWARE,
-		.config                 = PERF_COUNT_HW_CPU_CYCLES,
-		.sample_type            = PERF_SAMPLE_REGS_INTR,
-		.precise_ip             = 1,
-		.disabled               = 1,
-		.exclude_kernel         = 1,
-	};
-	int fd;
-	u32 version;
-	u64 extended_mask = 0, mask = PERF_REGS_MASK;
-
-	/*
-	 * Get the PVR value to set the extended
-	 * mask specific to platform.
-	 */
-	version = (((mfspr(SPRN_PVR)) >>  16) & 0xFFFF);
-	if (version == PVR_POWER9)
-		extended_mask = PERF_REG_PMU_MASK_300;
-	else if ((version == PVR_POWER10) || (version == PVR_POWER11))
-		extended_mask = PERF_REG_PMU_MASK_31;
-	else
-		return mask;
-
-	attr.sample_regs_intr = extended_mask;
-	attr.sample_period = 1;
-	event_attr_init(&attr);
-
-	/*
-	 * check if the pmu supports perf extended regs, before
-	 * returning the register mask to sample.
-	 */
-	fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
-	if (fd != -1) {
-		close(fd);
-		mask |= extended_mask;
-	}
-	return mask;
-}
-
-uint64_t arch__user_reg_mask(void)
-{
-	return PERF_REGS_MASK;
-}