linux-kernel - [RFC PATCH 17/17] perf/x86/intel/bts: Add PMU info

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Date:   Tue,  5 Sep 2017 16:30:26 +0300
From:   Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To:     Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:     Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        acme@...hat.com, kirill.shutemov@...ux.intel.com,
        Borislav Petkov <bp@...en8.de>, rric@...nel.org,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: [RFC PATCH 17/17] perf/x86/intel/bts: Add PMU info

Signed-off-by: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
---
 arch/x86/events/intel/bts.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/arch/x86/events/intel/bts.c b/arch/x86/events/intel/bts.c
index 16076eb346..ce1dac7115 100644
--- a/arch/x86/events/intel/bts.c
+++ b/arch/x86/events/intel/bts.c
@@ -21,13 +21,22 @@
 #include <linux/slab.h>
 #include <linux/debugfs.h>
 #include <linux/device.h>
-#include <linux/coredump.h>
 
 #include <asm-generic/sizes.h>
 #include <asm/perf_event.h>
 
 #include "../perf_event.h"
 
+#define PMU_NAME "intel_bts"
+
+static struct intel_bts_pmu_info {
+	struct pmu_info		pi;
+	u8			x86_family;
+	u8			x86_model;
+	u8			x86_step;
+	u8			__reserved_0[5];
+} bts_pmu_info;
+
 struct bts_ctx {
 	struct perf_output_handle	handle;
 	struct debug_store		ds_back;
@@ -582,6 +591,12 @@ static __init int bts_init(void)
 	if (!boot_cpu_has(X86_FEATURE_DTES64) || !x86_pmu.bts)
 		return -ENODEV;
 
+	bts_pmu_info.pi.note_size  = sizeof(bts_pmu_info.pi);
+	bts_pmu_info.pi.pmu_descsz = sizeof(bts_pmu_info) - bts_pmu_info.pi.note_size;
+	bts_pmu_info.x86_family    = boot_cpu_data.x86;
+	bts_pmu_info.x86_model	    = boot_cpu_data.x86_model;
+	bts_pmu_info.x86_step	    = boot_cpu_data.x86_mask;
+
 	bts_pmu.capabilities	= PERF_PMU_CAP_AUX_NO_SG | PERF_PMU_CAP_ITRACE |
 				  PERF_PMU_CAP_EXCLUSIVE;
 	bts_pmu.task_ctx_nr	= perf_sw_context;
@@ -593,7 +608,8 @@ static __init int bts_init(void)
 	bts_pmu.read		= bts_event_read;
 	bts_pmu.setup_aux	= bts_buffer_setup_aux;
 	bts_pmu.free_aux	= bts_buffer_free_aux;
+	bts_pmu.pmu_info	= &bts_pmu_info.pi;
 
-	return perf_pmu_register(&bts_pmu, "intel_bts", -1);
+	return perf_pmu_register(&bts_pmu, PMU_NAME, -1);
 }
 arch_initcall(bts_init);
-- 
2.14.1