---

yaml
---
r: 147467
b: refs/heads/master
c: 0bbd0d4
h: refs/heads/master
i:
  147465: dd17eb9
  147463: b51e829
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9d23a90a67261e73b2fcac04d8ca963c6b496afb
+refs/heads/master: 0bbd0d4be8d5d3676c126e06e3c75c16def00441

trunk/arch/powerpc/include/asm/perf_counter.h

@@ -30,20 +30,32 @@ struct power_pmu {
 				    u64 alt[]);
 	void	(*disable_pmc)(unsigned int pmc, u64 mmcr[]);
 	int	(*limited_pmc_event)(u64 event);
-	int	limited_pmc5_6;	/* PMC5 and PMC6 have limited function */
+	u32	flags;
 	int	n_generic;
 	int	*generic_events;
 };
 
 extern struct power_pmu *ppmu;
 
+/*
+ * Values for power_pmu.flags
+ */
+#define PPMU_LIMITED_PMC5_6	1	/* PMC5/6 have limited function */
+#define PPMU_ALT_SIPR		2	/* uses alternate posn for SIPR/HV */
+
 /*
  * Values for flags to get_alternatives()
  */
 #define PPMU_LIMITED_PMC_OK	1	/* can put this on a limited PMC */
 #define PPMU_LIMITED_PMC_REQD	2	/* have to put this on a limited PMC */
 #define PPMU_ONLY_COUNT_RUN	4	/* only counting in run state */
 
+struct pt_regs;
+extern unsigned long perf_misc_flags(struct pt_regs *regs);
+#define perf_misc_flags(regs)	perf_misc_flags(regs)
+
+extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
+
 /*
  * The power_pmu.get_constraint function returns a 64-bit value and
  * a 64-bit mask that express the constraints between this event and

trunk/arch/powerpc/include/asm/reg.h

@@ -492,11 +492,13 @@
 #define   MMCR0_FCHV	0x00000001UL /* freeze conditions in hypervisor mode */
 #define SPRN_MMCR1	798
 #define SPRN_MMCRA	0x312
+#define   MMCRA_SDSYNC	0x80000000UL /* SDAR synced with SIAR */
 #define   MMCRA_SIHV	0x10000000UL /* state of MSR HV when SIAR set */
 #define   MMCRA_SIPR	0x08000000UL /* state of MSR PR when SIAR set */
 #define   MMCRA_SLOT	0x07000000UL /* SLOT bits (37-39) */
 #define   MMCRA_SLOT_SHIFT	24
 #define   MMCRA_SAMPLE_ENABLE 0x00000001UL /* enable sampling */
+#define   POWER6_MMCRA_SDSYNC 0x0000080000000000ULL	/* SDAR/SIAR synced */
 #define   POWER6_MMCRA_SIHV   0x0000040000000000ULL
 #define   POWER6_MMCRA_SIPR   0x0000020000000000ULL
 #define   POWER6_MMCRA_THRM	0x00000020UL

trunk/arch/powerpc/kernel/perf_counter.c

@@ -17,6 +17,7 @@
 #include <asm/pmc.h>
 #include <asm/machdep.h>
 #include <asm/firmware.h>
+#include <asm/ptrace.h>
 
 struct cpu_hw_counters {
 	int n_counters;
@@ -310,7 +311,8 @@ static void power_pmu_read(struct perf_counter *counter)
  */
 static int is_limited_pmc(int pmcnum)
 {
-	return ppmu->limited_pmc5_6 && (pmcnum == 5 || pmcnum == 6);
+	return (ppmu->flags & PPMU_LIMITED_PMC5_6)
+		&& (pmcnum == 5 || pmcnum == 6);
 }
 
 static void freeze_limited_counters(struct cpu_hw_counters *cpuhw,
@@ -860,7 +862,7 @@ const struct pmu *hw_perf_counter_init(struct perf_counter *counter)
 	 * If this machine has limited counters, check whether this
 	 * event could go on a limited counter.
 	 */
-	if (ppmu->limited_pmc5_6) {
+	if (ppmu->flags & PPMU_LIMITED_PMC5_6) {
 		if (can_go_on_limited_pmc(counter, ev, flags)) {
 			flags |= PPMU_LIMITED_PMC_OK;
 		} else if (ppmu->limited_pmc_event(ev)) {
@@ -933,6 +935,7 @@ static void record_and_restart(struct perf_counter *counter, long val,
 	u64 period = counter->hw.irq_period;
 	s64 prev, delta, left;
 	int record = 0;
+	u64 addr, mmcra, sdsync;
 
 	/* we don't have to worry about interrupts here */
 	prev = atomic64_read(&counter->hw.prev_count);
@@ -963,8 +966,76 @@ static void record_and_restart(struct perf_counter *counter, long val,
 	/*
 	 * Finally record data if requested.
 	 */
-	if (record)
-		perf_counter_overflow(counter, nmi, regs, 0);
+	if (record) {
+		addr = 0;
+		if (counter->hw_event.record_type & PERF_RECORD_ADDR) {
+			/*
+			 * The user wants a data address recorded.
+			 * If we're not doing instruction sampling,
+			 * give them the SDAR (sampled data address).
+			 * If we are doing instruction sampling, then only
+			 * give them the SDAR if it corresponds to the
+			 * instruction pointed to by SIAR; this is indicated
+			 * by the [POWER6_]MMCRA_SDSYNC bit in MMCRA.
+			 */
+			mmcra = regs->dsisr;
+			sdsync = (ppmu->flags & PPMU_ALT_SIPR) ?
+				POWER6_MMCRA_SDSYNC : MMCRA_SDSYNC;
+			if (!(mmcra & MMCRA_SAMPLE_ENABLE) || (mmcra & sdsync))
+				addr = mfspr(SPRN_SDAR);
+		}
+		perf_counter_overflow(counter, nmi, regs, addr);
+	}
+}
+
+/*
+ * Called from generic code to get the misc flags (i.e. processor mode)
+ * for an event.
+ */
+unsigned long perf_misc_flags(struct pt_regs *regs)
+{
+	unsigned long mmcra;
+
+	if (TRAP(regs) != 0xf00) {
+		/* not a PMU interrupt */
+		return user_mode(regs) ? PERF_EVENT_MISC_USER :
+			PERF_EVENT_MISC_KERNEL;
+	}
+
+	mmcra = regs->dsisr;
+	if (ppmu->flags & PPMU_ALT_SIPR) {
+		if (mmcra & POWER6_MMCRA_SIHV)
+			return PERF_EVENT_MISC_HYPERVISOR;
+		return (mmcra & POWER6_MMCRA_SIPR) ? PERF_EVENT_MISC_USER :
+			PERF_EVENT_MISC_KERNEL;
+	}
+	if (mmcra & MMCRA_SIHV)
+		return PERF_EVENT_MISC_HYPERVISOR;
+	return (mmcra & MMCRA_SIPR) ? PERF_EVENT_MISC_USER :
+			PERF_EVENT_MISC_KERNEL;
+}
+
+/*
+ * Called from generic code to get the instruction pointer
+ * for an event.
+ */
+unsigned long perf_instruction_pointer(struct pt_regs *regs)
+{
+	unsigned long mmcra;
+	unsigned long ip;
+	unsigned long slot;
+
+	if (TRAP(regs) != 0xf00)
+		return regs->nip;	/* not a PMU interrupt */
+
+	ip = mfspr(SPRN_SIAR);
+	mmcra = regs->dsisr;
+	if ((mmcra & MMCRA_SAMPLE_ENABLE) && !(ppmu->flags & PPMU_ALT_SIPR)) {
+		slot = (mmcra & MMCRA_SLOT) >> MMCRA_SLOT_SHIFT;
+		if (slot > 1)
+			ip += 4 * (slot - 1);
+	}
+	return ip;
 }
 
 /*
@@ -983,6 +1054,11 @@ static void perf_counter_interrupt(struct pt_regs *regs)
 		freeze_limited_counters(cpuhw, mfspr(SPRN_PMC5),
 					mfspr(SPRN_PMC6));
 
+	/*
+	 * Overload regs->dsisr to store MMCRA so we only need to read it once.
+	 */
+	regs->dsisr = mfspr(SPRN_MMCRA);
+
 	/*
 	 * If interrupts were soft-disabled when this PMU interrupt
 	 * occurred, treat it as an NMI.

trunk/arch/powerpc/kernel/power5+-pmu.c

@@ -625,6 +625,6 @@ struct power_pmu power5p_pmu = {
 	.disable_pmc = power5p_disable_pmc,
 	.n_generic = ARRAY_SIZE(power5p_generic_events),
 	.generic_events = power5p_generic_events,
-	.limited_pmc5_6 = 1,
+	.flags = PPMU_LIMITED_PMC5_6,
 	.limited_pmc_event = power5p_limited_pmc_event,
 };

trunk/arch/powerpc/kernel/power6-pmu.c

@@ -485,6 +485,6 @@ struct power_pmu power6_pmu = {
 	.disable_pmc = p6_disable_pmc,
 	.n_generic = ARRAY_SIZE(power6_generic_events),
 	.generic_events = power6_generic_events,
-	.limited_pmc5_6 = 1,
+	.flags = PPMU_LIMITED_PMC5_6 | PPMU_ALT_SIPR,
 	.limited_pmc_event = p6_limited_pmc_event,
 };