perf/x86: Move Nehalem PEBS code to flag

Minor cleanup: use an explicit x86_pmu flag to handle the
missing Lock / TLB information on Nehalem, instead of always
checking the model number for each PEBS sample.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: acme@kernel.org
Cc: jolsa@kernel.org
Link: http://lkml.kernel.org/r/20170816222156.19953-2-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/events/intel/core.c

@@ -3905,6 +3905,7 @@ __init int intel_pmu_init(void)
 
 		intel_pmu_pebs_data_source_nhm();
 		x86_add_quirk(intel_nehalem_quirk);
+		x86_pmu.pebs_no_tlb = 1;
 
 		pr_cont("Nehalem events, ");
 		break;

arch/x86/events/intel/ds.c

@@ -149,8 +149,6 @@ static u64 load_latency_data(u64 status)
 {
 	union intel_x86_pebs_dse dse;
 	u64 val;
-	int model = boot_cpu_data.x86_model;
-	int fam = boot_cpu_data.x86;
 
 	dse.val = status;
 
@@ -162,8 +160,7 @@ static u64 load_latency_data(u64 status)
 	/*
 	 * Nehalem models do not support TLB, Lock infos
 	 */
-	if (fam == 0x6 && (model == 26 || model == 30
-	    || model == 31 || model == 46)) {
+	if (x86_pmu.pebs_no_tlb) {
 		val |= P(TLB, NA) | P(LOCK, NA);
 		return val;
 	}

arch/x86/events/perf_event.h

@@ -591,7 +591,8 @@ struct x86_pmu {
 			pebs		:1,
 			pebs_active	:1,
 			pebs_broken	:1,
-			pebs_prec_dist	:1;
+			pebs_prec_dist	:1,
+			pebs_no_tlb	:1;
 	int		pebs_record_size;
 	int		pebs_buffer_size;
 	void		(*drain_pebs)(struct pt_regs *regs);