Every architecture can provide a register list for sampling. If an
architecture doesn't support register sampling, it won't define the data
structure 'sample_reg_masks'. Consequently, any code using this
structure must be protected by the macro 'HAVE_PERF_REGS_SUPPORT'.
This patch defines a weak function, arch__sample_reg_masks(), which will
be replaced by an architecture-defined function for returning the
architecture's register list. With this refactoring, the function always
exists, the condition checking for 'HAVE_PERF_REGS_SUPPORT' is not
needed anymore, so remove it.
Signed-off-by: Leo Yan <leo.yan@linux.dev>
Reviewed-by: Ian Rogers <irogers@google.com>
Cc: James Clark <james.clark@arm.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Ming Wang <wangming01@loongson.cn>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: linux-csky@vger.kernel.org
Cc: linux-riscv@lists.infradead.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240214113947.240957-4-leo.yan@linux.dev
#include "perf_regs.h"
#include "../../../util/perf_regs.h"
-const struct sample_reg sample_reg_masks[] = {
+static const struct sample_reg sample_reg_masks[] = {
SMPL_REG_END
};
{
return PERF_REGS_MASK;
}
+
+const struct sample_reg *arch__sample_reg_masks(void)
+{
+ return sample_reg_masks;
+}
void arch__add_leaf_frame_record_opts(struct record_opts *opts)
{
+ const struct sample_reg *sample_reg_masks = arch__sample_reg_masks();
+
opts->sample_user_regs |= sample_reg_masks[PERF_REG_ARM64_LR].mask;
}
#define HWCAP_SVE (1 << 22)
#endif
-const struct sample_reg sample_reg_masks[] = {
+static const struct sample_reg sample_reg_masks[] = {
SMPL_REG(x0, PERF_REG_ARM64_X0),
SMPL_REG(x1, PERF_REG_ARM64_X1),
SMPL_REG(x2, PERF_REG_ARM64_X2),
}
return PERF_REGS_MASK;
}
+
+const struct sample_reg *arch__sample_reg_masks(void)
+{
+ return sample_reg_masks;
+}
#include "perf_regs.h"
#include "../../util/perf_regs.h"
-const struct sample_reg sample_reg_masks[] = {
+static const struct sample_reg sample_reg_masks[] = {
SMPL_REG_END
};
{
return PERF_REGS_MASK;
}
+
+const struct sample_reg *arch__sample_reg_masks(void)
+{
+ return sample_reg_masks;
+}
#include "perf_regs.h"
#include "../../../util/perf_regs.h"
-const struct sample_reg sample_reg_masks[] = {
+static const struct sample_reg sample_reg_masks[] = {
SMPL_REG_END
};
{
return PERF_REGS_MASK;
}
+
+const struct sample_reg *arch__sample_reg_masks(void)
+{
+ return sample_reg_masks;
+}
#include "perf_regs.h"
#include "../../util/perf_regs.h"
-const struct sample_reg sample_reg_masks[] = {
+static const struct sample_reg sample_reg_masks[] = {
SMPL_REG_END
};
{
return PERF_REGS_MASK;
}
+
+const struct sample_reg *arch__sample_reg_masks(void)
+{
+ return sample_reg_masks;
+}
#define PVR_POWER9 0x004E
#define PVR_POWER10 0x0080
-const struct sample_reg sample_reg_masks[] = {
+static const struct sample_reg sample_reg_masks[] = {
SMPL_REG(r0, PERF_REG_POWERPC_R0),
SMPL_REG(r1, PERF_REG_POWERPC_R1),
SMPL_REG(r2, PERF_REG_POWERPC_R2),
{
return PERF_REGS_MASK;
}
+
+const struct sample_reg *arch__sample_reg_masks(void)
+{
+ return sample_reg_masks;
+}
#include "perf_regs.h"
#include "../../util/perf_regs.h"
-const struct sample_reg sample_reg_masks[] = {
+static const struct sample_reg sample_reg_masks[] = {
SMPL_REG_END
};
{
return PERF_REGS_MASK;
}
+
+const struct sample_reg *arch__sample_reg_masks(void)
+{
+ return sample_reg_masks;
+}
#include "perf_regs.h"
#include "../../util/perf_regs.h"
-const struct sample_reg sample_reg_masks[] = {
+static const struct sample_reg sample_reg_masks[] = {
SMPL_REG_END
};
{
return PERF_REGS_MASK;
}
+
+const struct sample_reg *arch__sample_reg_masks(void)
+{
+ return sample_reg_masks;
+}
#include "../../../util/pmu.h"
#include "../../../util/pmus.h"
-const struct sample_reg sample_reg_masks[] = {
+static const struct sample_reg sample_reg_masks[] = {
SMPL_REG(AX, PERF_REG_X86_AX),
SMPL_REG(BX, PERF_REG_X86_BX),
SMPL_REG(CX, PERF_REG_X86_CX),
return SDT_ARG_VALID;
}
+const struct sample_reg *arch__sample_reg_masks(void)
+{
+ return sample_reg_masks;
+}
+
uint64_t arch__intr_reg_mask(void)
{
struct perf_event_attr attr = {
if (!strcmp(s, "?")) {
fprintf(stderr, "available registers: ");
-#ifdef HAVE_PERF_REGS_SUPPORT
- for (r = sample_reg_masks; r->name; r++) {
+ for (r = arch__sample_reg_masks(); r->name; r++) {
if (r->mask & mask)
fprintf(stderr, "%s ", r->name);
}
-#endif
fputc('\n', stderr);
/* just printing available regs */
goto error;
}
-#ifdef HAVE_PERF_REGS_SUPPORT
- for (r = sample_reg_masks; r->name; r++) {
+ for (r = arch__sample_reg_masks(); r->name; r++) {
if ((r->mask & mask) && !strcasecmp(s, r->name))
break;
}
-#endif
if (!r || !r->name) {
ui__warning("Unknown register \"%s\", check man page or run \"perf record %s?\"\n",
s, intr ? "-I" : "--user-regs=");
return 0;
}
+static const struct sample_reg sample_reg_masks[] = {
+ SMPL_REG_END
+};
+
+const struct sample_reg * __weak arch__sample_reg_masks(void)
+{
+ return sample_reg_masks;
+}
+
const char *perf_reg_name(int id, const char *arch)
{
const char *reg_name = NULL;
int arch_sdt_arg_parse_op(char *old_op, char **new_op);
uint64_t arch__intr_reg_mask(void);
uint64_t arch__user_reg_mask(void);
-
-extern const struct sample_reg sample_reg_masks[];
+const struct sample_reg *arch__sample_reg_masks(void);
const char *perf_reg_name(int id, const char *arch);
int perf_reg_value(u64 *valp, struct regs_dump *regs, int id);