[PATCH v1 07/10] perf/x86/uncore: allow more than one fixed counter per box

[Stephane Eranian]

This patch modifies some of the helper functions to support
more than one fixed counter per uncore PCI PMU box.

Signed-off-by: Stephane Eranian <eran...@google.com>
---
 arch/x86/kernel/cpu/perf_event_intel_uncore.c |    4 ++--
 arch/x86/kernel/cpu/perf_event_intel_uncore.h |   22 +++++++++++++---------
 2 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c 
b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
index 2980994c..69a4ad0 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -2777,8 +2777,8 @@ static void uncore_assign_hw_event(struct 
intel_uncore_box *box, struct perf_eve
        hwc->idx = idx;
        hwc->last_tag = ++box->tags[idx];
 
-       if (hwc->idx == UNCORE_PMC_IDX_FIXED) {
-               hwc->event_base = uncore_fixed_ctr(box);
+       if (hwc->idx >= UNCORE_PMC_IDX_FIXED) {
+               hwc->event_base = uncore_fixed_ctr(box, idx);
                hwc->config_base = uncore_fixed_ctl(box);
                return;
        }
diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.h 
b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
index 433c180..c63a3ff 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.h
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
@@ -538,9 +538,18 @@ static inline unsigned uncore_pci_fixed_ctl(struct 
intel_uncore_box *box)
        return box->pmu->type->fixed_ctl;
 }
 
-static inline unsigned uncore_pci_fixed_ctr(struct intel_uncore_box *box)
+static inline int uncore_fixed_ctr_bits(struct intel_uncore_box *box)
+{
+       return box->pmu->type->fixed_ctr_bits;
+}
+
+static inline unsigned uncore_pci_fixed_ctr(struct intel_uncore_box *box,
+                                           int idx)
 {
-       return box->pmu->type->fixed_ctr;
+       int bits = uncore_fixed_ctr_bits(box);
+       int bytes = round_up(bits, 8);
+
+       return idx * bytes + box->pmu->type->fixed_ctr;
 }
 
 static inline
@@ -554,11 +563,6 @@ static inline int uncore_perf_ctr_bits(struct 
intel_uncore_box *box)
        return box->pmu->type->perf_ctr_bits;
 }
 
-static inline int uncore_fixed_ctr_bits(struct intel_uncore_box *box)
-{
-       return box->pmu->type->fixed_ctr_bits;
-}
-
 static inline
 unsigned uncore_pci_perf_ctr(struct intel_uncore_box *box, int idx)
 {
@@ -627,10 +631,10 @@ unsigned uncore_fixed_ctl(struct intel_uncore_box *box)
 }
 
 static inline
-unsigned uncore_fixed_ctr(struct intel_uncore_box *box)
+unsigned uncore_fixed_ctr(struct intel_uncore_box *box, int idx)
 {
        if (box->pci_dev)
-               return uncore_pci_fixed_ctr(box);
+               return uncore_pci_fixed_ctr(box, idx);
        else
                return uncore_msr_fixed_ctr(box);
 }
-- 
1.7.9.5

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