diff options
Diffstat (limited to 'tools/include/linux')
| -rw-r--r-- | tools/include/linux/coresight-pmu.h | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/tools/include/linux/coresight-pmu.h b/tools/include/linux/coresight-pmu.h index db9c7c0abb6a..1760f9a574b0 100644 --- a/tools/include/linux/coresight-pmu.h +++ b/tools/include/linux/coresight-pmu.h @@ -10,12 +10,28 @@ #include <linux/bits.h> #define CORESIGHT_ETM_PMU_NAME "cs_etm" -#define CORESIGHT_ETM_PMU_SEED 0x10 + +/* + * The legacy Trace ID system based on fixed calculation from the cpu + * number. This has been replaced by drivers using a dynamic allocation + * system - but need to retain the legacy algorithm for backward comparibility + * in certain situations:- + * a) new perf running on older systems that generate the legacy mapping + * b) older tools that may not update at the same time as the kernel. + */ +#define CORESIGHT_LEGACY_CPU_TRACE_ID(cpu) (0x10 + (cpu * 2)) /* CoreSight trace ID is currently the bottom 7 bits of the value */ #define CORESIGHT_TRACE_ID_VAL_MASK GENMASK(6, 0) /* + * perf record will set the legacy meta data values as unused initially. + * This allows perf report to manage the decoders created when dynamic + * allocation in operation. + */ +#define CORESIGHT_TRACE_ID_UNUSED_FLAG BIT(31) + +/* * Below are the definition of bit offsets for perf option, and works as * arbitrary values for all ETM versions. * @@ -39,15 +55,4 @@ #define ETM4_CFG_BIT_RETSTK 12 #define ETM4_CFG_BIT_VMID_OPT 15 -static inline int coresight_get_trace_id(int cpu) -{ - /* - * A trace ID of value 0 is invalid, so let's start at some - * random value that fits in 7 bits and go from there. Since - * the common convention is to have data trace IDs be I(N) + 1, - * set instruction trace IDs as a function of the CPU number. - */ - return (CORESIGHT_ETM_PMU_SEED + (cpu * 2)); -} - #endif |