@@ -60,6 +60,8 @@ static void init_ev_encodes(void)
switch (pvr) {
case POWER10:
+ ev_mask_thd_cmp = 0x3ffff;
+ ev_shift_thd_cmp = 0;
ev_mask_rsq = 1;
ev_shift_rsq = 9;
ev_mask_comb = 3;
@@ -410,3 +412,45 @@ u64 get_reg_value(u64 *intr_regs, char *register_name)
return *(intr_regs + register_bit_position);
}
+
+int get_thresh_cmp_val(struct event event)
+{
+ int exp = 0;
+ u64 result = 0;
+ u64 value;
+
+ if (!have_hwcap2(PPC_FEATURE2_ARCH_3_1))
+ return EV_CODE_EXTRACT(event.attr.config, thd_cmp);
+
+ value = EV_CODE_EXTRACT(event.attr.config1, thd_cmp);
+
+ if (!value)
+ return value;
+
+ /*
+ * Incase of P10, thresh_cmp value is not part of raw event code
+ * and provided via attr.config1 parameter. To program threshold in MMCRA,
+ * take a 18 bit number N and shift right 2 places and increment
+ * the exponent E by 1 until the upper 10 bits of N are zero.
+ * Write E to the threshold exponent and write the lower 8 bits of N
+ * to the threshold mantissa.
+ * The max threshold that can be written is 261120.
+ */
+ if (value > 261120)
+ value = 261120;
+ while ((64 - __builtin_clzl(value)) > 8) {
+ exp++;
+ value >>= 2;
+ }
+
+ /*
+ * Note that it is invalid to write a mantissa with the
+ * upper 2 bits of mantissa being zero, unless the
+ * exponent is also zero.
+ */
+ if (!(value & 0xC0) && exp)
+ result = -1;
+ else
+ result = (exp << 8) | value;
+ return result;
+}
@@ -52,6 +52,7 @@ void *__event_read_samples(void *sample_buff, size_t *size, u64 *sample_count);
int collect_samples(void *sample_buff);
u64 *get_intr_regs(struct event *event, void *sample_buff);
u64 get_reg_value(u64 *intr_regs, char *register_name);
+int get_thresh_cmp_val(struct event event);
static inline int get_mmcr0_fc56(u64 mmcr0, int pmc)
{