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perf branch: Add branch privilege information request flag

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This updates the perf tools with branch privilege information request flag
i.e PERF_SAMPLE_BRANCH_PRIV_SAVE that has been added earlier in the kernel.
This also updates 'perf record' documentation, branch_modes[], and generic
branch privilege level enumeration as added earlier in the kernel.

Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20220824044822.70230-8-anshuman.khandual@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Anshuman Khandual 2022-08-24 10:18:21 +05:30 • committed by Arnaldo Carvalho de Melo
parent 0ddea8e2a0
commit bcb96ce6d2
5 changed files with 18 additions and 3 deletions
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14
tools/include/uapi/linux/perf_event.h
View file

@ -204,6 +204,8 @@ enum perf_branch_sample_type_shift {
PERF_SAMPLE_BRANCH_HW_INDEX_SHIFT = 17, /* save low level index of raw branch records */
PERF_SAMPLE_BRANCH_PRIV_SAVE_SHIFT = 18, /* save privilege mode */
PERF_SAMPLE_BRANCH_MAX_SHIFT /* non-ABI */
};
@ -233,6 +235,8 @@ enum perf_branch_sample_type {
PERF_SAMPLE_BRANCH_HW_INDEX = 1U << PERF_SAMPLE_BRANCH_HW_INDEX_SHIFT,
PERF_SAMPLE_BRANCH_PRIV_SAVE = 1U << PERF_SAMPLE_BRANCH_PRIV_SAVE_SHIFT,
PERF_SAMPLE_BRANCH_MAX = 1U << PERF_SAMPLE_BRANCH_MAX_SHIFT,
};
@ -271,6 +275,13 @@ enum {
PERF_BR_NEW_MAX,
};
enum {
PERF_BR_PRIV_UNKNOWN = 0,
PERF_BR_PRIV_USER = 1,
PERF_BR_PRIV_KERNEL = 2,
PERF_BR_PRIV_HV = 3,
};
#define PERF_SAMPLE_BRANCH_PLM_ALL \
(PERF_SAMPLE_BRANCH_USER|\
PERF_SAMPLE_BRANCH_KERNEL|\
@ -1389,7 +1400,8 @@ struct perf_branch_entry {
cycles:16, /* cycle count to last branch */
type:4, /* branch type */
new_type:4, /* additional branch type */
reserved:36;
priv:3, /* privilege level */
reserved:33;
};
union perf_sample_weight {