Commit-ID: 9fac2cf316b070ae43d2ae2525e381ff2d1d68aa Gitweb: http://git.kernel.org/tip/9fac2cf316b070ae43d2ae2525e381ff2d1d68aa Author: Stephane Eranian <eran...@google.com> AuthorDate: Thu, 24 Jan 2013 16:10:27 +0100 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Mon, 1 Apr 2013 12:15:04 -0300
perf/x86: Add flags to event constraints This patch adds a flags field to each event constraint. It can be used to store event specific features which can then later be used by scheduling code or low-level x86 code. The flags are propagated into event->hw.flags during the get_event_constraint() call. They are cleared during the put_event_constraint() call. This mechanism is going to be used by the PEBS-LL patches. It avoids defining yet another table to hold event specific information. Signed-off-by: Stephane Eranian <eran...@google.com> Cc: pet...@infradead.org Cc: a...@linux.intel.com Cc: jo...@redhat.com Cc: namhyung....@lge.com Link: http://lkml.kernel.org/r/1359040242-8269-4-git-send-email-eran...@google.com Signed-off-by: Ingo Molnar <mi...@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- arch/x86/kernel/cpu/perf_event.c | 2 +- arch/x86/kernel/cpu/perf_event.h | 8 +++++--- arch/x86/kernel/cpu/perf_event_intel.c | 6 +++++- arch/x86/kernel/cpu/perf_event_intel_ds.c | 4 +++- arch/x86/kernel/cpu/perf_event_intel_uncore.c | 2 +- include/linux/perf_event.h | 1 + 6 files changed, 16 insertions(+), 7 deletions(-) diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index 6e8ab04..8ba5151 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -1489,7 +1489,7 @@ static int __init init_hw_perf_events(void) unconstrained = (struct event_constraint) __EVENT_CONSTRAINT(0, (1ULL << x86_pmu.num_counters) - 1, - 0, x86_pmu.num_counters, 0); + 0, x86_pmu.num_counters, 0, 0); x86_pmu.attr_rdpmc = 1; /* enable userspace RDPMC usage by default */ x86_pmu_format_group.attrs = x86_pmu.format_attrs; diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h index b1518ee..9686d38 100644 --- a/arch/x86/kernel/cpu/perf_event.h +++ b/arch/x86/kernel/cpu/perf_event.h @@ -59,6 +59,7 @@ struct event_constraint { u64 cmask; int weight; int overlap; + int flags; }; struct amd_nb { @@ -170,16 +171,17 @@ struct cpu_hw_events { void *kfree_on_online; }; -#define __EVENT_CONSTRAINT(c, n, m, w, o) {\ +#define __EVENT_CONSTRAINT(c, n, m, w, o, f) {\ { .idxmsk64 = (n) }, \ .code = (c), \ .cmask = (m), \ .weight = (w), \ .overlap = (o), \ + .flags = f, \ } #define EVENT_CONSTRAINT(c, n, m) \ - __EVENT_CONSTRAINT(c, n, m, HWEIGHT(n), 0) + __EVENT_CONSTRAINT(c, n, m, HWEIGHT(n), 0, 0) /* * The overlap flag marks event constraints with overlapping counter @@ -203,7 +205,7 @@ struct cpu_hw_events { * and its counter masks must be kept at a minimum. */ #define EVENT_CONSTRAINT_OVERLAP(c, n, m) \ - __EVENT_CONSTRAINT(c, n, m, HWEIGHT(n), 1) + __EVENT_CONSTRAINT(c, n, m, HWEIGHT(n), 1, 0) /* * Constraint on the Event code. diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c index dab7580..df3beaa 100644 --- a/arch/x86/kernel/cpu/perf_event_intel.c +++ b/arch/x86/kernel/cpu/perf_event_intel.c @@ -1392,8 +1392,11 @@ x86_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event) if (x86_pmu.event_constraints) { for_each_event_constraint(c, x86_pmu.event_constraints) { - if ((event->hw.config & c->cmask) == c->code) + if ((event->hw.config & c->cmask) == c->code) { + /* hw.flags zeroed at initialization */ + event->hw.flags |= c->flags; return c; + } } } @@ -1438,6 +1441,7 @@ intel_put_shared_regs_event_constraints(struct cpu_hw_events *cpuc, static void intel_put_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event) { + event->hw.flags = 0; intel_put_shared_regs_event_constraints(cpuc, event); } diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c index 826054a..f30d85b 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c @@ -430,8 +430,10 @@ struct event_constraint *intel_pebs_constraints(struct perf_event *event) if (x86_pmu.pebs_constraints) { for_each_event_constraint(c, x86_pmu.pebs_constraints) { - if ((event->hw.config & c->cmask) == c->code) + if ((event->hw.config & c->cmask) == c->code) { + event->hw.flags |= c->flags; return c; + } } } diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c index b43200d..75da9e1 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c +++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c @@ -2438,7 +2438,7 @@ static int __init uncore_type_init(struct intel_uncore_type *type) type->unconstrainted = (struct event_constraint) __EVENT_CONSTRAINT(0, (1ULL << type->num_counters) - 1, - 0, type->num_counters, 0); + 0, type->num_counters, 0, 0); for (i = 0; i < type->num_boxes; i++) { pmus[i].func_id = -1; diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 1c59211..cd3bb2c 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -127,6 +127,7 @@ struct hw_perf_event { int event_base_rdpmc; int idx; int last_cpu; + int flags; struct hw_perf_event_extra extra_reg; struct hw_perf_event_extra branch_reg; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
