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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc 
 kernel/arch/powerpc/perf/isa207-common.c
....@@ -1,14 +1,10 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * Common Performance counter support functions for PowerISA v2.07 processors.
34  *
45  * Copyright 2009 Paul Mackerras, IBM Corporation.
56  * Copyright 2013 Michael Ellerman, IBM Corporation.
67  * Copyright 2016 Madhavan Srinivasan, IBM Corporation.
7
- *
8
- * This program is free software; you can redistribute it and/or
9
- * modify it under the terms of the GNU General Public License
10
- * as published by the Free Software Foundation; either version
11
- * 2 of the License, or (at your option) any later version.
128  */
139 #include "isa207-common.h"
1410 
....@@ -59,7 +55,9 @@
5955 {
6056 	u64 valid_mask = EVENT_VALID_MASK;
6157 
62
-	if (cpu_has_feature(CPU_FTR_ARCH_300))
58
+	if (cpu_has_feature(CPU_FTR_ARCH_31))
59
+		valid_mask = p10_EVENT_VALID_MASK;
60
+	else if (cpu_has_feature(CPU_FTR_ARCH_300))
6361 		valid_mask = p9_EVENT_VALID_MASK;
6462 
6563 	return !(event & ~valid_mask);
....@@ -73,6 +71,14 @@
7371 	return false;
7472 }
7573 
74
+static unsigned long sdar_mod_val(u64 event)
75
+{
76
+	if (cpu_has_feature(CPU_FTR_ARCH_31))
77
+		return p10_SDAR_MODE(event);
78
+
79
+	return p9_SDAR_MODE(event);
80
+}
81
+
7682 static void mmcra_sdar_mode(u64 event, unsigned long *mmcra)
7783 {
7884 	/*
....@@ -83,7 +89,7 @@
8389 	 * MMCRA[SDAR_MODE] will be programmed as "0b01" for continous sampling
8490 	 * mode and will be un-changed when setting MMCRA[63] (Marked events).
8591 	 *
86
-	 * Incase of Power9:
92
+	 * Incase of Power9/power10:
8793 	 * Marked event: MMCRA[SDAR_MODE] will be set to 0b00 ('No Updates'),
8894 	 *               or if group already have any marked events.
8995 	 * For rest
....@@ -94,8 +100,8 @@
94100 	if (cpu_has_feature(CPU_FTR_ARCH_300)) {
95101 		if (is_event_marked(event) || (*mmcra & MMCRA_SAMPLE_ENABLE))
96102 			*mmcra &= MMCRA_SDAR_MODE_NO_UPDATES;
97
-		else if (p9_SDAR_MODE(event))
98
-			*mmcra |=  p9_SDAR_MODE(event) << MMCRA_SDAR_MODE_SHIFT;
103
+		else if (sdar_mod_val(event))
104
+			*mmcra |= sdar_mod_val(event) << MMCRA_SDAR_MODE_SHIFT;
99105 		else
100106 			*mmcra |= MMCRA_SDAR_MODE_DCACHE;
101107 	} else
....@@ -138,7 +144,11 @@
138144 	/*
139145 	 * Check the mantissa upper two bits are not zero, unless the
140146 	 * exponent is also zero. See the THRESH_CMP_MANTISSA doc.
147
+	 * Power10: thresh_cmp is replaced by l2_l3 event select.
141148 	 */
149
+	if (cpu_has_feature(CPU_FTR_ARCH_31))
150
+		return false;
151
+
142152 	cmp = (event >> EVENT_THR_CMP_SHIFT) & EVENT_THR_CMP_MASK;
143153 	exp = cmp >> 7;
144154 
....@@ -237,6 +247,9 @@
237247 	u64 sier = mfspr(SPRN_SIER);
238248 	u64 val = (sier & ISA207_SIER_TYPE_MASK) >> ISA207_SIER_TYPE_SHIFT;
239249 
250
+	if (cpu_has_feature(CPU_FTR_ARCH_31))
251
+		mantissa = P10_MMCRA_THR_CTR_MANT(mmcra);
252
+
240253 	if (val == 0 || val == 7)
241254 		*weight = 0;
242255 	else
....@@ -255,7 +268,12 @@
255268 
256269 	pmc   = (event >> EVENT_PMC_SHIFT)        & EVENT_PMC_MASK;
257270 	unit  = (event >> EVENT_UNIT_SHIFT)       & EVENT_UNIT_MASK;
258
-	cache = (event >> EVENT_CACHE_SEL_SHIFT)  & EVENT_CACHE_SEL_MASK;
271
+	if (cpu_has_feature(CPU_FTR_ARCH_31))
272
+		cache = (event >> EVENT_CACHE_SEL_SHIFT) &
273
+			p10_EVENT_CACHE_SEL_MASK;
274
+	else
275
+		cache = (event >> EVENT_CACHE_SEL_SHIFT) &
276
+			EVENT_CACHE_SEL_MASK;
259277 	ebb   = (event >> EVENT_EBB_SHIFT)        & EVENT_EBB_MASK;
260278 
261279 	if (pmc) {
....@@ -296,21 +314,39 @@
296314 	}
297315 
298316 	if (unit >= 6 && unit <= 9) {
299
-		/*
300
-		 * L2/L3 events contain a cache selector field, which is
301
-		 * supposed to be programmed into MMCRC. However MMCRC is only
302
-		 * HV writable, and there is no API for guest kernels to modify
303
-		 * it. The solution is for the hypervisor to initialise the
304
-		 * field to zeroes, and for us to only ever allow events that
305
-		 * have a cache selector of zero. The bank selector (bit 3) is
306
-		 * irrelevant, as long as the rest of the value is 0.
307
-		 */
308
-		if (!cpu_has_feature(CPU_FTR_ARCH_300) && (cache & 0x7))
317
+		if (cpu_has_feature(CPU_FTR_ARCH_31)) {
318
+			if (unit == 6) {
319
+				mask |= CNST_L2L3_GROUP_MASK;
320
+				value |= CNST_L2L3_GROUP_VAL(event >> p10_L2L3_EVENT_SHIFT);
321
+			}
322
+		} else if (cpu_has_feature(CPU_FTR_ARCH_300)) {
323
+			mask  |= CNST_CACHE_GROUP_MASK;
324
+			value |= CNST_CACHE_GROUP_VAL(event & 0xff);
325
+
326
+			mask |= CNST_CACHE_PMC4_MASK;
327
+			if (pmc == 4)
328
+				value |= CNST_CACHE_PMC4_VAL;
329
+		} else if (cache & 0x7) {
330
+			/*
331
+			 * L2/L3 events contain a cache selector field, which is
332
+			 * supposed to be programmed into MMCRC. However MMCRC is only
333
+			 * HV writable, and there is no API for guest kernels to modify
334
+			 * it. The solution is for the hypervisor to initialise the
335
+			 * field to zeroes, and for us to only ever allow events that
336
+			 * have a cache selector of zero. The bank selector (bit 3) is
337
+			 * irrelevant, as long as the rest of the value is 0.
338
+			 */
309339 			return -1;
340
+		}
310341 
311342 	} else if (cpu_has_feature(CPU_FTR_ARCH_300) || (event & EVENT_IS_L1)) {
312343 		mask  |= CNST_L1_QUAL_MASK;
313344 		value |= CNST_L1_QUAL_VAL(cache);
345
+	}
346
+
347
+	if (cpu_has_feature(CPU_FTR_ARCH_31)) {
348
+		mask |= CNST_RADIX_SCOPE_GROUP_MASK;
349
+		value |= CNST_RADIX_SCOPE_GROUP_VAL(event >> p10_EVENT_RADIX_SCOPE_QUAL_SHIFT);
314350 	}
315351 
316352 	if (is_event_marked(event)) {
....@@ -318,11 +354,17 @@
318354 		value |= CNST_SAMPLE_VAL(event >> EVENT_SAMPLE_SHIFT);
319355 	}
320356 
321
-	if (cpu_has_feature(CPU_FTR_ARCH_300))  {
357
+	if (cpu_has_feature(CPU_FTR_ARCH_31)) {
358
+		if (event_is_threshold(event)) {
359
+			mask  |= CNST_THRESH_CTL_SEL_MASK;
360
+			value |= CNST_THRESH_CTL_SEL_VAL(event >> EVENT_THRESH_SHIFT);
361
+		}
362
+	} else if (cpu_has_feature(CPU_FTR_ARCH_300))  {
322363 		if (event_is_threshold(event) && is_thresh_cmp_valid(event)) {
323364 			mask  |= CNST_THRESH_MASK;
324365 			value |= CNST_THRESH_VAL(event >> EVENT_THRESH_SHIFT);
325
-		}
366
+		} else if (event_is_threshold(event))
367
+			return -1;
326368 	} else {
327369 		/*
328370 		 * Special case for PM_MRK_FAB_RSP_MATCH and PM_MRK_FAB_RSP_MATCH_CYC,
....@@ -369,10 +411,11 @@
369411 }
370412 
371413 int isa207_compute_mmcr(u64 event[], int n_ev,
372
-			       unsigned int hwc[], unsigned long mmcr[],
414
+			       unsigned int hwc[], struct mmcr_regs *mmcr,
373415 			       struct perf_event *pevents[])
374416 {
375417 	unsigned long mmcra, mmcr1, mmcr2, unit, combine, psel, cache, val;
418
+	unsigned long mmcr3;
376419 	unsigned int pmc, pmc_inuse;
377420 	int i;
378421 
....@@ -385,7 +428,14 @@
385428 			pmc_inuse |= 1 << pmc;
386429 	}
387430 
388
-	mmcra = mmcr1 = mmcr2 = 0;
431
+	mmcra = mmcr1 = mmcr2 = mmcr3 = 0;
432
+
433
+	/*
434
+	 * Disable bhrb unless explicitly requested
435
+	 * by setting MMCRA (BHRBRD) bit.
436
+	 */
437
+	if (cpu_has_feature(CPU_FTR_ARCH_31))
438
+		mmcra |= MMCRA_BHRB_DISABLE;
389439 
390440 	/* Second pass: assign PMCs, set all MMCR1 fields */
391441 	for (i = 0; i < n_ev; ++i) {
....@@ -422,6 +472,13 @@
422472 			}
423473 		}
424474 
475
+		/* Set RADIX_SCOPE_QUAL bit */
476
+		if (cpu_has_feature(CPU_FTR_ARCH_31)) {
477
+			val = (event[i] >> p10_EVENT_RADIX_SCOPE_QUAL_SHIFT) &
478
+				p10_EVENT_RADIX_SCOPE_QUAL_MASK;
479
+			mmcr1 |= val << p10_MMCR1_RADIX_SCOPE_QUAL_SHIFT;
480
+		}
481
+
425482 		if (is_event_marked(event[i])) {
426483 			mmcra |= MMCRA_SAMPLE_ENABLE;
427484 
....@@ -444,14 +501,28 @@
444501 			mmcra |= val << MMCRA_THR_CTL_SHIFT;
445502 			val = (event[i] >> EVENT_THR_SEL_SHIFT) & EVENT_THR_SEL_MASK;
446503 			mmcra |= val << MMCRA_THR_SEL_SHIFT;
447
-			val = (event[i] >> EVENT_THR_CMP_SHIFT) & EVENT_THR_CMP_MASK;
448
-			mmcra |= thresh_cmp_val(val);
504
+			if (!cpu_has_feature(CPU_FTR_ARCH_31)) {
505
+				val = (event[i] >> EVENT_THR_CMP_SHIFT) &
506
+					EVENT_THR_CMP_MASK;
507
+				mmcra |= thresh_cmp_val(val);
508
+			}
509
+		}
510
+
511
+		if (cpu_has_feature(CPU_FTR_ARCH_31) && (unit == 6)) {
512
+			val = (event[i] >> p10_L2L3_EVENT_SHIFT) &
513
+				p10_EVENT_L2L3_SEL_MASK;
514
+			mmcr2 |= val << p10_L2L3_SEL_SHIFT;
449515 		}
450516 
451517 		if (event[i] & EVENT_WANTS_BHRB) {
452518 			val = (event[i] >> EVENT_IFM_SHIFT) & EVENT_IFM_MASK;
453519 			mmcra |= val << MMCRA_IFM_SHIFT;
454520 		}
521
+
522
+		/* set MMCRA (BHRBRD) to 0 if there is user request for BHRB */
523
+		if (cpu_has_feature(CPU_FTR_ARCH_31) &&
524
+				(has_branch_stack(pevents[i]) || (event[i] & EVENT_WANTS_BHRB)))
525
+			mmcra &= ~MMCRA_BHRB_DISABLE;
455526 
456527 		if (pevents[i]->attr.exclude_user)
457528 			mmcr2 |= MMCR2_FCP(pmc);
....@@ -466,34 +537,51 @@
466537 				mmcr2 |= MMCR2_FCS(pmc);
467538 		}
468539 
540
+		if (cpu_has_feature(CPU_FTR_ARCH_31)) {
541
+			if (pmc <= 4) {
542
+				val = (event[i] >> p10_EVENT_MMCR3_SHIFT) &
543
+					p10_EVENT_MMCR3_MASK;
544
+				mmcr3 |= val << MMCR3_SHIFT(pmc);
545
+			}
546
+		}
547
+
469548 		hwc[i] = pmc - 1;
470549 	}
471550 
472551 	/* Return MMCRx values */
473
-	mmcr[0] = 0;
552
+	mmcr->mmcr0 = 0;
474553 
475554 	/* pmc_inuse is 1-based */
476555 	if (pmc_inuse & 2)
477
-		mmcr[0] = MMCR0_PMC1CE;
556
+		mmcr->mmcr0 = MMCR0_PMC1CE;
478557 
479558 	if (pmc_inuse & 0x7c)
480
-		mmcr[0] |= MMCR0_PMCjCE;
559
+		mmcr->mmcr0 |= MMCR0_PMCjCE;
481560 
482561 	/* If we're not using PMC 5 or 6, freeze them */
483562 	if (!(pmc_inuse & 0x60))
484
-		mmcr[0] |= MMCR0_FC56;
563
+		mmcr->mmcr0 |= MMCR0_FC56;
485564 
486
-	mmcr[1] = mmcr1;
487
-	mmcr[2] = mmcra;
488
-	mmcr[3] = mmcr2;
565
+	/*
566
+	 * Set mmcr0 (PMCCEXT) for p10 which
567
+	 * will restrict access to group B registers
568
+	 * when MMCR0 PMCC=0b00.
569
+	 */
570
+	if (cpu_has_feature(CPU_FTR_ARCH_31))
571
+		mmcr->mmcr0 |= MMCR0_PMCCEXT;
572
+
573
+	mmcr->mmcr1 = mmcr1;
574
+	mmcr->mmcra = mmcra;
575
+	mmcr->mmcr2 = mmcr2;
576
+	mmcr->mmcr3 = mmcr3;
489577 
490578 	return 0;
491579 }
492580 
493
-void isa207_disable_pmc(unsigned int pmc, unsigned long mmcr[])
581
+void isa207_disable_pmc(unsigned int pmc, struct mmcr_regs *mmcr)
494582 {
495583 	if (pmc <= 3)
496
-		mmcr[1] &= ~(0xffUL << MMCR1_PMCSEL_SHIFT(pmc + 1));
584
+		mmcr->mmcr1 &= ~(0xffUL << MMCR1_PMCSEL_SHIFT(pmc + 1));
497585 }
498586 
499587 static int find_alternative(u64 event, const unsigned int ev_alt[][MAX_ALT], int size)