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Diffstat (limited to 'arch/powerpc/kernel/power5+-pmu.c')
-rw-r--r--arch/powerpc/kernel/power5+-pmu.c117
1 files changed, 98 insertions, 19 deletions
diff --git a/arch/powerpc/kernel/power5+-pmu.c b/arch/powerpc/kernel/power5+-pmu.c
index 1222c8ea3c2..8154eaa2404 100644
--- a/arch/powerpc/kernel/power5+-pmu.c
+++ b/arch/powerpc/kernel/power5+-pmu.c
@@ -78,8 +78,8 @@
* Layout of constraint bits:
* 6666555555555544444444443333333333222222222211111111110000000000
* 3210987654321098765432109876543210987654321098765432109876543210
- * [ ><><>< ><> <><>[ > < >< >< >< ><><><><>
- * NC G0G1G2 G3 T0T1 UC B0 B1 B2 B3 P4P3P2P1
+ * [ ><><>< ><> <><>[ > < >< >< >< ><><><><><><>
+ * NC G0G1G2 G3 T0T1 UC B0 B1 B2 B3 P6P5P4P3P2P1
*
* NC - number of counters
* 51: NC error 0x0008_0000_0000_0000
@@ -105,18 +105,18 @@
* 30: IDU|GRS events needed 0x00_4000_0000
*
* B0
- * 20-23: Byte 0 event source 0x00f0_0000
+ * 24-27: Byte 0 event source 0x0f00_0000
* Encoding as for the event code
*
* B1, B2, B3
- * 16-19, 12-15, 8-11: Byte 1, 2, 3 event sources
+ * 20-23, 16-19, 12-15: Byte 1, 2, 3 event sources
*
- * P4
- * 7: P1 error 0x80
- * 6-7: Count of events needing PMC4
+ * P6
+ * 11: P6 error 0x800
+ * 10-11: Count of events needing PMC6
*
- * P1..P3
- * 0-6: Count of events needing PMC1..PMC3
+ * P1..P5
+ * 0-9: Count of events needing PMC1..PMC5
*/
static const int grsel_shift[8] = {
@@ -143,11 +143,13 @@ static int power5p_get_constraint(unsigned int event, u64 *maskp, u64 *valp)
pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
if (pmc) {
- if (pmc > 4)
+ if (pmc > 6)
return -1;
sh = (pmc - 1) * 2;
mask |= 2 << sh;
value |= 1 << sh;
+ if (pmc >= 5 && !(event == 0x500009 || event == 0x600005))
+ return -1;
}
if (event & PM_BUSEVENT_MSK) {
unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
@@ -173,16 +175,26 @@ static int power5p_get_constraint(unsigned int event, u64 *maskp, u64 *valp)
value |= (u64)((event >> PM_GRS_SH) & fmask) << sh;
}
/* Set byte lane select field */
- mask |= 0xfULL << (20 - 4 * byte);
- value |= (u64)unit << (20 - 4 * byte);
+ mask |= 0xfULL << (24 - 4 * byte);
+ value |= (u64)unit << (24 - 4 * byte);
+ }
+ if (pmc < 5) {
+ /* need a counter from PMC1-4 set */
+ mask |= 0x8000000000000ull;
+ value |= 0x1000000000000ull;
}
- mask |= 0x8000000000000ull;
- value |= 0x1000000000000ull;
*maskp = mask;
*valp = value;
return 0;
}
+static int power5p_limited_pmc_event(unsigned int event)
+{
+ int pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
+
+ return pmc == 5 || pmc == 6;
+}
+
#define MAX_ALT 3 /* at most 3 alternatives for any event */
static const unsigned int event_alternatives[][MAX_ALT] = {
@@ -193,6 +205,7 @@ static const unsigned int event_alternatives[][MAX_ALT] = {
{ 0x410c7, 0x441084 }, /* PM_THRD_L2MISS_BOTH_CYC */
{ 0x800c4, 0xc20e0 }, /* PM_DTLB_MISS */
{ 0xc50c6, 0xc60e0 }, /* PM_MRK_DTLB_MISS */
+ { 0x100005, 0x600005 }, /* PM_RUN_CYC */
{ 0x100009, 0x200009 }, /* PM_INST_CMPL */
{ 0x200015, 0x300015 }, /* PM_LSU_LMQ_SRQ_EMPTY_CYC */
{ 0x300009, 0x400009 }, /* PM_INST_DISP */
@@ -260,24 +273,85 @@ static int find_alternative_bdecode(unsigned int event)
return -1;
}
-static int power5p_get_alternatives(unsigned int event, unsigned int alt[])
+static int power5p_get_alternatives(unsigned int event, unsigned int flags,
+ unsigned int alt[])
{
int i, j, ae, nalt = 1;
+ int nlim;
alt[0] = event;
nalt = 1;
+ nlim = power5p_limited_pmc_event(event);
i = find_alternative(event);
if (i >= 0) {
for (j = 0; j < MAX_ALT; ++j) {
ae = event_alternatives[i][j];
if (ae && ae != event)
alt[nalt++] = ae;
+ nlim += power5p_limited_pmc_event(ae);
}
} else {
ae = find_alternative_bdecode(event);
if (ae > 0)
alt[nalt++] = ae;
}
+
+ if (flags & PPMU_ONLY_COUNT_RUN) {
+ /*
+ * We're only counting in RUN state,
+ * so PM_CYC is equivalent to PM_RUN_CYC
+ * and PM_INST_CMPL === PM_RUN_INST_CMPL.
+ * This doesn't include alternatives that don't provide
+ * any extra flexibility in assigning PMCs (e.g.
+ * 0x100005 for PM_RUN_CYC vs. 0xf for PM_CYC).
+ * Note that even with these additional alternatives
+ * we never end up with more than 3 alternatives for any event.
+ */
+ j = nalt;
+ for (i = 0; i < nalt; ++i) {
+ switch (alt[i]) {
+ case 0xf: /* PM_CYC */
+ alt[j++] = 0x600005; /* PM_RUN_CYC */
+ ++nlim;
+ break;
+ case 0x600005: /* PM_RUN_CYC */
+ alt[j++] = 0xf;
+ break;
+ case 0x100009: /* PM_INST_CMPL */
+ alt[j++] = 0x500009; /* PM_RUN_INST_CMPL */
+ ++nlim;
+ break;
+ case 0x500009: /* PM_RUN_INST_CMPL */
+ alt[j++] = 0x100009; /* PM_INST_CMPL */
+ alt[j++] = 0x200009;
+ break;
+ }
+ }
+ nalt = j;
+ }
+
+ if (!(flags & PPMU_LIMITED_PMC_OK) && nlim) {
+ /* remove the limited PMC events */
+ j = 0;
+ for (i = 0; i < nalt; ++i) {
+ if (!power5p_limited_pmc_event(alt[i])) {
+ alt[j] = alt[i];
+ ++j;
+ }
+ }
+ nalt = j;
+ } else if ((flags & PPMU_LIMITED_PMC_REQD) && nlim < nalt) {
+ /* remove all but the limited PMC events */
+ j = 0;
+ for (i = 0; i < nalt; ++i) {
+ if (power5p_limited_pmc_event(alt[i])) {
+ alt[j] = alt[i];
+ ++j;
+ }
+ }
+ nalt = j;
+ }
+
return nalt;
}
@@ -390,7 +464,7 @@ static int power5p_compute_mmcr(unsigned int event[], int n_ev,
unsigned char unituse[16];
int ttmuse;
- if (n_ev > 4)
+ if (n_ev > 6)
return -1;
/* First pass to count resource use */
@@ -399,7 +473,7 @@ static int power5p_compute_mmcr(unsigned int event[], int n_ev,
for (i = 0; i < n_ev; ++i) {
pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
if (pmc) {
- if (pmc > 4)
+ if (pmc > 6)
return -1;
if (pmc_inuse & (1 << (pmc - 1)))
return -1;
@@ -488,13 +562,16 @@ static int power5p_compute_mmcr(unsigned int event[], int n_ev,
if (pmc >= 4)
return -1;
pmc_inuse |= 1 << pmc;
- } else {
+ } else if (pmc <= 4) {
/* Direct event */
--pmc;
if (isbus && (byte & 2) &&
(psel == 8 || psel == 0x10 || psel == 0x28))
/* add events on higher-numbered bus */
mmcr1 |= 1ull << (MMCR1_PMC1_ADDER_SEL_SH - pmc);
+ } else {
+ /* Instructions or run cycles on PMC5/6 */
+ --pmc;
}
if (isbus && unit == PM_GRS) {
bit = psel & 7;
@@ -538,7 +615,7 @@ static int power5p_generic_events[] = {
};
struct power_pmu power5p_pmu = {
- .n_counter = 4,
+ .n_counter = 6,
.max_alternatives = MAX_ALT,
.add_fields = 0x7000000000055ull,
.test_adder = 0x3000040000000ull,
@@ -548,4 +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,
+ .limited_pmc_event = power5p_limited_pmc_event,
};