diff options
| author | Kan Liang <kan.liang@linux.intel.com> | 2022-02-01 13:23:21 -0800 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-02-02 13:11:43 +0100 |
| commit | 2145e77fecfb3965b1dc299bac203b167238bd0b (patch) | |
| tree | a45c982010ee824b79daae887f6311d9a67e1db9 /arch/x86/include | |
| parent | 58b2ff2c18b1e1d7232b8007a5698ec4ee7a7a0d (diff) | |
| download | linux-2145e77fecfb3965b1dc299bac203b167238bd0b.tar.bz2 | |
perf/x86/intel: Enable PEBS format 5
The new PEBS Record Format 5 is similar to the PEBS Record Format 4. The
only difference is the layout of the Counter Reset fields of the PEBS
Config Buffer in the DS area. For the PEBS format 4, the Counter Reset
fields allocation is for 8 general-purpose counters followed by 4
fixed-function counters. For the PEBS format 5, the Counter Reset fields
allocation is for 32 general-purpose counters followed by 16
fixed-function counters.
Extend the MAX_PEBS_EVENTS to 32. Add MAX_PEBS_EVENTS_FMT4 for the
previous platform. Except for the DS auto-reload code, other places
already assume 32 counters. Only check the PEBS_FMT in the DS
auto-reload code.
Extend the MAX_FIXED_PEBS_EVENTS to 16, which only impacts the size of
struct debug_store and some local temporary variables. The size of
struct debug_store increases 288B, which is small and should be
acceptable.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/1643750603-100733-1-git-send-email-kan.liang@linux.intel.com
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/intel_ds.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/include/asm/intel_ds.h b/arch/x86/include/asm/intel_ds.h index 8380c3ddd4b2..2f9eeb5c3069 100644 --- a/arch/x86/include/asm/intel_ds.h +++ b/arch/x86/include/asm/intel_ds.h @@ -7,8 +7,9 @@ #define PEBS_BUFFER_SIZE (PAGE_SIZE << 4) /* The maximal number of PEBS events: */ -#define MAX_PEBS_EVENTS 8 -#define MAX_FIXED_PEBS_EVENTS 4 +#define MAX_PEBS_EVENTS_FMT4 8 +#define MAX_PEBS_EVENTS 32 +#define MAX_FIXED_PEBS_EVENTS 16 /* * A debug store configuration. |