Re: [PATCH] ARM: Delete ARM11MPCore perf leftovers

---
This fixes a warning reported in the SoC tree, it's not even
in next yet. Now that I turned on ARMv6 in my builds it is
also tested.
---
 arch/arm/kernel/perf_event_v6.c | 94 -----------------------------------------
 1 file changed, 94 deletions(-)

diff --git a/arch/arm/kernel/perf_event_v6.c b/arch/arm/kernel/perf_event_v6.c
index 3115077f6abc..0cbf46233d6b 100644
--- a/arch/arm/kernel/perf_event_v6.c
+++ b/arch/arm/kernel/perf_event_v6.c

@@ -113,69 +113,6 @@ static const unsigned armv6_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
 	[C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)]	= ARMV6_PERFCTR_ITLB_MISS,
 };
 
-enum armv6mpcore_perf_types {
-	ARMV6MPCORE_PERFCTR_ICACHE_MISS	    = 0x0,
-	ARMV6MPCORE_PERFCTR_IBUF_STALL	    = 0x1,
-	ARMV6MPCORE_PERFCTR_DDEP_STALL	    = 0x2,
-	ARMV6MPCORE_PERFCTR_ITLB_MISS	    = 0x3,
-	ARMV6MPCORE_PERFCTR_DTLB_MISS	    = 0x4,
-	ARMV6MPCORE_PERFCTR_BR_EXEC	    = 0x5,
-	ARMV6MPCORE_PERFCTR_BR_NOTPREDICT   = 0x6,
-	ARMV6MPCORE_PERFCTR_BR_MISPREDICT   = 0x7,
-	ARMV6MPCORE_PERFCTR_INSTR_EXEC	    = 0x8,
-	ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS = 0xA,
-	ARMV6MPCORE_PERFCTR_DCACHE_RDMISS   = 0xB,
-	ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS = 0xC,
-	ARMV6MPCORE_PERFCTR_DCACHE_WRMISS   = 0xD,
-	ARMV6MPCORE_PERFCTR_DCACHE_EVICTION = 0xE,
-	ARMV6MPCORE_PERFCTR_SW_PC_CHANGE    = 0xF,
-	ARMV6MPCORE_PERFCTR_MAIN_TLB_MISS   = 0x10,
-	ARMV6MPCORE_PERFCTR_EXPL_MEM_ACCESS = 0x11,
-	ARMV6MPCORE_PERFCTR_LSU_FULL_STALL  = 0x12,
-	ARMV6MPCORE_PERFCTR_WBUF_DRAINED    = 0x13,
-	ARMV6MPCORE_PERFCTR_CPU_CYCLES	    = 0xFF,
-};
-
-/*
- * The hardware events that we support. We do support cache operations but
- * we have harvard caches and no way to combine instruction and data
- * accesses/misses in hardware.
- */
-static const unsigned armv6mpcore_perf_map[PERF_COUNT_HW_MAX] = {
-	PERF_MAP_ALL_UNSUPPORTED,
-	[PERF_COUNT_HW_CPU_CYCLES]		= ARMV6MPCORE_PERFCTR_CPU_CYCLES,
-	[PERF_COUNT_HW_INSTRUCTIONS]		= ARMV6MPCORE_PERFCTR_INSTR_EXEC,
-	[PERF_COUNT_HW_BRANCH_INSTRUCTIONS]	= ARMV6MPCORE_PERFCTR_BR_EXEC,
-	[PERF_COUNT_HW_BRANCH_MISSES]		= ARMV6MPCORE_PERFCTR_BR_MISPREDICT,
-	[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND]	= ARMV6MPCORE_PERFCTR_IBUF_STALL,
-	[PERF_COUNT_HW_STALLED_CYCLES_BACKEND]	= ARMV6MPCORE_PERFCTR_LSU_FULL_STALL,
-};
-
-static const unsigned armv6mpcore_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
-					[PERF_COUNT_HW_CACHE_OP_MAX]
-					[PERF_COUNT_HW_CACHE_RESULT_MAX] = {
-	PERF_CACHE_MAP_ALL_UNSUPPORTED,
-
-	[C(L1D)][C(OP_READ)][C(RESULT_ACCESS)]	= ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS,
-	[C(L1D)][C(OP_READ)][C(RESULT_MISS)]	= ARMV6MPCORE_PERFCTR_DCACHE_RDMISS,
-	[C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)]	= ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS,
-	[C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]	= ARMV6MPCORE_PERFCTR_DCACHE_WRMISS,
-
-	[C(L1I)][C(OP_READ)][C(RESULT_MISS)]	= ARMV6MPCORE_PERFCTR_ICACHE_MISS,
-
-	/*
-	 * The ARM performance counters can count micro DTLB misses, micro ITLB
-	 * misses and main TLB misses. There isn't an event for TLB misses, so
-	 * use the micro misses here and if users want the main TLB misses they
-	 * can use a raw counter.
-	 */
-	[C(DTLB)][C(OP_READ)][C(RESULT_MISS)]	= ARMV6MPCORE_PERFCTR_DTLB_MISS,
-	[C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)]	= ARMV6MPCORE_PERFCTR_DTLB_MISS,
-
-	[C(ITLB)][C(OP_READ)][C(RESULT_MISS)]	= ARMV6MPCORE_PERFCTR_ITLB_MISS,
-	[C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)]	= ARMV6MPCORE_PERFCTR_ITLB_MISS,
-};
-
 static inline unsigned long
 armv6_pmcr_read(void)
 {

@@ -452,37 +389,6 @@ static void armv6pmu_disable_event(struct perf_event *event)
 	raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
 }
 
-static void armv6mpcore_pmu_disable_event(struct perf_event *event)
-{
-	unsigned long val, mask, flags, evt = 0;
-	struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
-	struct hw_perf_event *hwc = &event->hw;
-	struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
-	int idx = hwc->idx;
-
-	if (ARMV6_CYCLE_COUNTER == idx) {
-		mask	= ARMV6_PMCR_CCOUNT_IEN;
-	} else if (ARMV6_COUNTER0 == idx) {
-		mask	= ARMV6_PMCR_COUNT0_IEN;
-	} else if (ARMV6_COUNTER1 == idx) {
-		mask	= ARMV6_PMCR_COUNT1_IEN;
-	} else {
-		WARN_ONCE(1, "invalid counter number (%d)\n", idx);
-		return;
-	}
-
-	/*
-	 * Unlike UP ARMv6, we don't have a way of stopping the counters. We
-	 * simply disable the interrupt reporting.
-	 */
-	raw_spin_lock_irqsave(&events->pmu_lock, flags);
-	val = armv6_pmcr_read();
-	val &= ~mask;
-	val |= evt;
-	armv6_pmcr_write(val);
-	raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
-}
-
 static int armv6_map_event(struct perf_event *event)
 {
 	return armpmu_map_event(event, &armv6_perf_map,

---
base-commit: b057e7afb79ec2edddc940b82af6e3571d1f0ffe
change-id: 20231224-drop-11mpcore-fix-c6cb526d1296

Best regards,
-- 
Linus Walleij [off-list ref]