From: Jiri Olsa <jolsa@kernel.org>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>,
"Liang, Kan" <kan.liang@linux.intel.com>,
Stephane Eranian <eranian@google.com>,
Andy Lutomirski <luto@kernel.org>
Cc: lkml <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Andi Kleen <ak@linux.intel.com>,
Vince Weaver <vincent.weaver@maine.edu>,
Thomas Gleixner <tglx@linutronix.de>,
Arnaldo Carvalho de Melo <acme@kernel.org>
Subject: [PATCH 6/8] perf/x86/rapl: Get msr values from new probe framework
Date: Mon, 18 Mar 2019 19:21:14 +0100 [thread overview]
Message-ID: <20190318182116.17388-7-jolsa@kernel.org> (raw)
In-Reply-To: <20190318182116.17388-1-jolsa@kernel.org>
There's no need to have special code for getting
the bit and msr value for given event. We can
now easily get it from rapl_msrs array.
Also getting rid of RAPL_IDX_*, which is no longer
needed and replacing INTEL_RAPL* with PERF_RAPL*
enums.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
arch/x86/events/intel/rapl.c | 53 ++++++++----------------------------
1 file changed, 11 insertions(+), 42 deletions(-)
diff --git a/arch/x86/events/intel/rapl.c b/arch/x86/events/intel/rapl.c
index bef547583338..870a676641c0 100644
--- a/arch/x86/events/intel/rapl.c
+++ b/arch/x86/events/intel/rapl.c
@@ -54,6 +54,7 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/perf_event.h>
+#include <linux/nospec.h>
#include <asm/cpu_device_id.h>
#include <asm/intel-family.h>
#include "../perf_event.h"
@@ -64,19 +65,6 @@ MODULE_LICENSE("GPL");
/*
* RAPL energy status counters
*/
-#define RAPL_IDX_PP0_NRG_STAT 0 /* all cores */
-#define INTEL_RAPL_PP0 0x1 /* pseudo-encoding */
-#define RAPL_IDX_PKG_NRG_STAT 1 /* entire package */
-#define INTEL_RAPL_PKG 0x2 /* pseudo-encoding */
-#define RAPL_IDX_RAM_NRG_STAT 2 /* DRAM */
-#define INTEL_RAPL_RAM 0x3 /* pseudo-encoding */
-#define RAPL_IDX_PP1_NRG_STAT 3 /* gpu */
-#define INTEL_RAPL_PP1 0x4 /* pseudo-encoding */
-#define RAPL_IDX_PSYS_NRG_STAT 4 /* psys */
-#define INTEL_RAPL_PSYS 0x5 /* pseudo-encoding */
-
-#define NR_RAPL_DOMAINS 0x5
-
enum perf_rapl_events {
PERF_RAPL_PP0 = 0, /* all cores */
PERF_RAPL_PKG, /* entire package */
@@ -85,6 +73,7 @@ enum perf_rapl_events {
PERF_RAPL_PSYS, /* psys */
PERF_RAPL_MAX,
+ NR_RAPL_DOMAINS = PERF_RAPL_MAX,
};
static const char *const rapl_domain_names[NR_RAPL_DOMAINS] __initconst = {
@@ -148,6 +137,7 @@ static struct rapl_pmus *rapl_pmus;
static cpumask_t rapl_cpu_mask;
static unsigned int rapl_cntr_mask;
static u64 rapl_timer_ms;
+static struct perf_msr rapl_msrs[];
static inline struct rapl_pmu *cpu_to_rapl_pmu(unsigned int cpu)
{
@@ -339,7 +329,7 @@ static void rapl_pmu_event_del(struct perf_event *event, int flags)
static int rapl_pmu_event_init(struct perf_event *event)
{
u64 cfg = event->attr.config & RAPL_EVENT_MASK;
- int bit, msr, ret = 0;
+ int bit, ret = 0;
struct rapl_pmu *pmu;
/* only look at RAPL events */
@@ -355,33 +345,12 @@ static int rapl_pmu_event_init(struct perf_event *event)
event->event_caps |= PERF_EV_CAP_READ_ACTIVE_PKG;
- /*
- * check event is known (determines counter)
- */
- switch (cfg) {
- case INTEL_RAPL_PP0:
- bit = RAPL_IDX_PP0_NRG_STAT;
- msr = MSR_PP0_ENERGY_STATUS;
- break;
- case INTEL_RAPL_PKG:
- bit = RAPL_IDX_PKG_NRG_STAT;
- msr = MSR_PKG_ENERGY_STATUS;
- break;
- case INTEL_RAPL_RAM:
- bit = RAPL_IDX_RAM_NRG_STAT;
- msr = MSR_DRAM_ENERGY_STATUS;
- break;
- case INTEL_RAPL_PP1:
- bit = RAPL_IDX_PP1_NRG_STAT;
- msr = MSR_PP1_ENERGY_STATUS;
- break;
- case INTEL_RAPL_PSYS:
- bit = RAPL_IDX_PSYS_NRG_STAT;
- msr = MSR_PLATFORM_ENERGY_STATUS;
- break;
- default:
+ if (!cfg || cfg >= NR_RAPL_DOMAINS + 1)
return -EINVAL;
- }
+
+ cfg = array_index_nospec(cfg, NR_RAPL_DOMAINS + 1);
+ bit = cfg - 1;
+
/* check event supported */
if (!(rapl_cntr_mask & (1 << bit)))
return -EINVAL;
@@ -396,7 +365,7 @@ static int rapl_pmu_event_init(struct perf_event *event)
return -EINVAL;
event->cpu = pmu->cpu;
event->pmu_private = pmu;
- event->hw.event_base = msr;
+ event->hw.event_base = rapl_msrs[bit].msr;
event->hw.config = cfg;
event->hw.idx = bit;
@@ -670,7 +639,7 @@ static int rapl_check_hw_unit(bool apply_quirk)
* of 2. Datasheet, September 2014, Reference Number: 330784-001 "
*/
if (apply_quirk)
- rapl_hw_unit[RAPL_IDX_RAM_NRG_STAT] = 16;
+ rapl_hw_unit[PERF_RAPL_RAM] = 16;
/*
* Calculate the timer rate:
--
2.17.2
next prev parent reply other threads:[~2019-03-18 18:21 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-18 18:21 [RFC 0/8] perf/x86: Add msr probe interface Jiri Olsa
2019-03-18 18:21 ` [PATCH 1/8] " Jiri Olsa
2019-03-20 15:48 ` Peter Zijlstra
2019-03-20 16:03 ` Greg Kroah-Hartman
2019-03-21 11:09 ` Jiri Olsa
2019-03-18 18:21 ` [PATCH 2/8] perf/x86/msr: Use new probe function Jiri Olsa
2019-03-18 18:21 ` [PATCH 3/8] perf/x86/cstate: " Jiri Olsa
2019-03-18 18:21 ` [PATCH 4/8] perf/x86/rapl: Use new msr detection interface Jiri Olsa
2019-03-18 18:21 ` [PATCH 5/8] perf/x86/rapl: Get rapl_cntr_mask from new probe framework Jiri Olsa
2019-03-18 18:21 ` Jiri Olsa [this message]
2019-03-18 18:21 ` [PATCH 7/8] perf/x86/rapl: Get attributes " Jiri Olsa
2019-03-18 18:21 ` [PATCH 8/8] perf/x86/rapl: Get quirk state " Jiri Olsa
2019-05-27 21:51 [PATCH 0/8] perf/x86: Rework msr probe interface Jiri Olsa
2019-05-27 21:51 ` [PATCH 6/8] perf/x86/rapl: Get msr values from new probe framework Jiri Olsa
2019-05-31 12:09 [PATCHv2 0/8] perf/x86: Rework msr probe interface Jiri Olsa
2019-05-31 12:09 ` [PATCH 6/8] perf/x86/rapl: Get msr values from new probe framework Jiri Olsa
2019-06-16 14:03 [PATCHv3 0/8] perf/x86: Rework msr probe interface Jiri Olsa
2019-06-16 14:03 ` [PATCH 6/8] perf/x86/rapl: Get msr values from new probe framework Jiri Olsa
2019-06-17 11:42 ` Peter Zijlstra
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