mirror of
https://github.com/torvalds/linux.git
synced 2024-12-12 06:02:38 +00:00
ca138a7aab
Icelake and later platforms support collecting XMM registers with PEBS
event.
Add support for 'perf script' to dump them, and support for the register
parser in 'perf record -I=' ... to configure them.
For now they are just printed in hex, we could potentially later add
other formats too.
Committer testing:
Before:
# perf record -IXMM0
Warning:
unknown register XMM0, check man page or run 'perf record -I?'
Usage: perf record [<options>] [<command>]
or: perf record [<options>] -- <command> [<options>]
#
# perf record -I?
available registers: AX BX CX DX SI DI BP SP IP FLAGS CS SS R8 R9 R10 R11 R12 R13 R14 R15
Usage: perf record [<options>] [<command>]
or: perf record [<options>] -- <command> [<options>]
#
After:
# perf record -IXMM0
Error:
The sys_perf_event_open() syscall returned with 22 (Invalid argument) for event (cycles).
/bin/dmesg | grep -i perf may provide additional information.
#
# perf record -I?
available registers: AX BX CX DX SI DI BP SP IP FLAGS CS SS R8 R9 R10 R11 R12 R13 R14 R15 XMM0 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 XMM9 XMM10 XMM11 XMM12 XMM13 XMM14 XMM15
Usage: perf record [<options>] [<command>]
or: perf record [<options>] -- <command> [<options>]
-I, --intr-regs[=<any register>]
sample selected machine registers on interrupt, use -I ? to list register names
#
More work is needed to, when faced with such error, warn the user that
that register is not available on the running platform.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190506141926.13659-1-kan.liang@linux.intel.com
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
49 lines
993 B
C
49 lines
993 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __PERF_REGS_H
|
|
#define __PERF_REGS_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/compiler.h>
|
|
|
|
struct regs_dump;
|
|
|
|
struct sample_reg {
|
|
const char *name;
|
|
uint64_t mask;
|
|
};
|
|
#define SMPL_REG(n, b) { .name = #n, .mask = 1ULL << (b) }
|
|
#define SMPL_REG2(n, b) { .name = #n, .mask = 3ULL << (b) }
|
|
#define SMPL_REG_END { .name = NULL }
|
|
|
|
extern const struct sample_reg sample_reg_masks[];
|
|
|
|
enum {
|
|
SDT_ARG_VALID = 0,
|
|
SDT_ARG_SKIP,
|
|
};
|
|
|
|
int arch_sdt_arg_parse_op(char *old_op, char **new_op);
|
|
|
|
#ifdef HAVE_PERF_REGS_SUPPORT
|
|
#include <perf_regs.h>
|
|
|
|
int perf_reg_value(u64 *valp, struct regs_dump *regs, int id);
|
|
|
|
#else
|
|
#define PERF_REGS_MASK 0
|
|
#define PERF_REGS_MAX 0
|
|
|
|
static inline const char *perf_reg_name(int id __maybe_unused)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int perf_reg_value(u64 *valp __maybe_unused,
|
|
struct regs_dump *regs __maybe_unused,
|
|
int id __maybe_unused)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* HAVE_PERF_REGS_SUPPORT */
|
|
#endif /* __PERF_REGS_H */
|