[tip: perf/core] perf/x86/intel/uncore: Add box_offsets for free-running counters

[tip-bot2 for Kan Liang]

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     bc88a2fe216a51e8ab46d61f89d0c1b5a400470e
Gitweb:        https://git.kernel.org/tip/bc88a2fe216a51e8ab46d61f89d0c1b5a400470e
Author:        Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
AuthorDate:    Tue, 17 Mar 2020 11:38:32 -07:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Fri, 20 Mar 2020 13:06:23 +01:00

perf/x86/intel/uncore: Add box_offsets for free-running counters

The offset between uncore boxes of free-running counters varies, e.g.
IIO free-running counters on Ice Lake server.

Add box_offsets, an array of offsets between adjacent uncore boxes.

Signed-off-by: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/1584470314-46657-1-git-send-email-kan.liang@xxxxxxxxxxxxxxx
---
 arch/x86/events/intel/uncore.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/x86/events/intel/uncore.h b/arch/x86/events/intel/uncore.h
index 1204dcc..b30429f 100644
--- a/arch/x86/events/intel/uncore.h
+++ b/arch/x86/events/intel/uncore.h
@@ -154,6 +154,7 @@ struct freerunning_counters {
 	unsigned int box_offset;
 	unsigned int num_counters;
 	unsigned int bits;
+	unsigned *box_offsets;
 };
 
 struct pci2phy_map {
@@ -310,7 +311,9 @@ unsigned int uncore_freerunning_counter(struct intel_uncore_box *box,
 
 	return pmu->type->freerunning[type].counter_base +
 	       pmu->type->freerunning[type].counter_offset * idx +
-	       pmu->type->freerunning[type].box_offset * pmu->pmu_idx;
+	       (pmu->type->freerunning[type].box_offsets ?
+	        pmu->type->freerunning[type].box_offsets[pmu->pmu_idx] :
+	        pmu->type->freerunning[type].box_offset * pmu->pmu_idx);
 }
 
 static inline