perf/x86: Fixes for Nehalem-EX uncore driver

This patch includes following fixes and update:
 - Only some events in the Sbox and Mbox can use the match/mask
   registers, add code to check this.
 - The format definitions for xbr_mm_cfg and xbr_match registers
   in the Rbox are wrong, xbr_mm_cfg should use 32 bits, xbr_match
   should use 64 bits.
 - Cleanup the Rbox code. Compute the addresses extra registers in
   the enable_event function instead of the hw_config function.
   This simplifies the code in nhmex_rbox_alter_er().

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1344229882-3907-2-git-send-email-zheng.z.yan@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
index a7ccd68..84434e2 100644 (file)
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -796,7 +796,6 @@ static struct intel_uncore_type *nhm_msr_uncores[] = {
 
 DEFINE_UNCORE_FORMAT_ATTR(event5, event, "config:1-5");
 DEFINE_UNCORE_FORMAT_ATTR(counter, counter, "config:6-7");
-DEFINE_UNCORE_FORMAT_ATTR(mm_cfg, mm_cfg, "config:63");
 DEFINE_UNCORE_FORMAT_ATTR(match, match, "config1:0-63");
 DEFINE_UNCORE_FORMAT_ATTR(mask, mask, "config2:0-63");
 
@@ -1032,24 +1031,22 @@ static struct intel_uncore_type nhmex_uncore_bbox = {
 
 static int nhmex_sbox_hw_config(struct intel_uncore_box *box, struct perf_event *event)
 {
-       struct hw_perf_event_extra *reg1 = &event->hw.extra_reg;
-       struct hw_perf_event_extra *reg2 = &event->hw.branch_reg;
+       struct hw_perf_event *hwc = &event->hw;
+       struct hw_perf_event_extra *reg1 = &hwc->extra_reg;
+       struct hw_perf_event_extra *reg2 = &hwc->branch_reg;
 
-       if (event->attr.config & NHMEX_S_PMON_MM_CFG_EN) {
-               reg1->config = event->attr.config1;
-               reg2->config = event->attr.config2;
-       } else {
-               reg1->config = ~0ULL;
-               reg2->config = ~0ULL;
-       }
+       /* only TO_R_PROG_EV event uses the match/mask register */
+       if ((hwc->config & NHMEX_PMON_CTL_EV_SEL_MASK) !=
+           NHMEX_S_EVENT_TO_R_PROG_EV)
+               return 0;
 
        if (box->pmu->pmu_idx == 0)
                reg1->reg = NHMEX_S0_MSR_MM_CFG;
        else
                reg1->reg = NHMEX_S1_MSR_MM_CFG;
-
        reg1->idx = 0;
-
+       reg1->config = event->attr.config1;
+       reg2->config = event->attr.config2;
        return 0;
 }
 
@@ -1059,8 +1056,8 @@ static void nhmex_sbox_msr_enable_event(struct intel_uncore_box *box, struct per
        struct hw_perf_event_extra *reg1 = &hwc->extra_reg;
        struct hw_perf_event_extra *reg2 = &hwc->branch_reg;
 
-       wrmsrl(reg1->reg, 0);
-       if (reg1->config != ~0ULL || reg2->config != ~0ULL) {
+       if (reg1->idx != EXTRA_REG_NONE) {
+               wrmsrl(reg1->reg, 0);
                wrmsrl(reg1->reg + 1, reg1->config);
                wrmsrl(reg1->reg + 2, reg2->config);
                wrmsrl(reg1->reg, NHMEX_S_PMON_MM_CFG_EN);
@@ -1074,7 +1071,6 @@ static struct attribute *nhmex_uncore_sbox_formats_attr[] = {
        &format_attr_edge.attr,
        &format_attr_inv.attr,
        &format_attr_thresh8.attr,
-       &format_attr_mm_cfg.attr,
        &format_attr_match.attr,
        &format_attr_mask.attr,
        NULL,
@@ -1264,7 +1260,8 @@ again:
        }
 
        /* for the match/mask registers */
-       if ((uncore_box_is_fake(box) || !reg2->alloc) &&
+       if (reg2->idx != EXTRA_REG_NONE &&
+           (uncore_box_is_fake(box) || !reg2->alloc) &&
            !nhmex_mbox_get_shared_reg(box, reg2->idx, reg2->config))
                goto fail;
 
@@ -1278,7 +1275,8 @@ again:
                if (idx[0] != 0xff && idx[0] != __BITS_VALUE(reg1->idx, 0, 8))
                        nhmex_mbox_alter_er(event, idx[0], true);
                reg1->alloc |= alloc;
-               reg2->alloc = 1;
+               if (reg2->idx != EXTRA_REG_NONE)
+                       reg2->alloc = 1;
        }
        return NULL;
 fail:
@@ -1342,9 +1340,6 @@ static int nhmex_mbox_hw_config(struct intel_uncore_box *box, struct perf_event
        struct extra_reg *er;
        unsigned msr;
        int reg_idx = 0;
-
-       if (WARN_ON_ONCE(reg1->idx != -1))
-               return -EINVAL;
        /*
         * The mbox events may require 2 extra MSRs at the most. But only
         * the lower 32 bits in these MSRs are significant, so we can use
@@ -1355,11 +1350,6 @@ static int nhmex_mbox_hw_config(struct intel_uncore_box *box, struct perf_event
                        continue;
                if (event->attr.config1 & ~er->valid_mask)
                        return -EINVAL;
-               if (er->idx == __BITS_VALUE(reg1->idx, 0, 8) ||
-                   er->idx == __BITS_VALUE(reg1->idx, 1, 8))
-                       continue;
-               if (WARN_ON_ONCE(reg_idx >= 2))
-                       return -EINVAL;
 
                msr = er->msr + type->msr_offset * box->pmu->pmu_idx;
                if (WARN_ON_ONCE(msr >= 0xffff || er->idx >= 0xff))
@@ -1368,6 +1358,8 @@ static int nhmex_mbox_hw_config(struct intel_uncore_box *box, struct perf_event
                /* always use the 32~63 bits to pass the PLD config */
                if (er->idx == EXTRA_REG_NHMEX_M_PLD)
                        reg_idx = 1;
+               else if (WARN_ON_ONCE(reg_idx > 0))
+                       return -EINVAL;
 
                reg1->idx &= ~(0xff << (reg_idx * 8));
                reg1->reg &= ~(0xffff << (reg_idx * 16));
@@ -1376,17 +1368,21 @@ static int nhmex_mbox_hw_config(struct intel_uncore_box *box, struct perf_event
                reg1->config = event->attr.config1;
                reg_idx++;
        }
-       /* use config2 to pass the filter config */
-       reg2->idx = EXTRA_REG_NHMEX_M_FILTER;
-       if (event->attr.config2 & NHMEX_M_PMON_MM_CFG_EN)
-               reg2->config = event->attr.config2;
-       else
-               reg2->config = ~0ULL;
-       if (box->pmu->pmu_idx == 0)
-               reg2->reg = NHMEX_M0_MSR_PMU_MM_CFG;
-       else
-               reg2->reg = NHMEX_M1_MSR_PMU_MM_CFG;
-
+       /*
+        * The mbox only provides ability to perform address matching
+        * for the PLD events.
+        */
+       if (reg_idx == 2) {
+               reg2->idx = EXTRA_REG_NHMEX_M_FILTER;
+               if (event->attr.config2 & NHMEX_M_PMON_MM_CFG_EN)
+                       reg2->config = event->attr.config2;
+               else
+                       reg2->config = ~0ULL;
+               if (box->pmu->pmu_idx == 0)
+                       reg2->reg = NHMEX_M0_MSR_PMU_MM_CFG;
+               else
+                       reg2->reg = NHMEX_M1_MSR_PMU_MM_CFG;
+       }
        return 0;
 }
 
@@ -1422,34 +1418,36 @@ static void nhmex_mbox_msr_enable_event(struct intel_uncore_box *box, struct per
                wrmsrl(__BITS_VALUE(reg1->reg, 1, 16),
                        nhmex_mbox_shared_reg_config(box, idx));
 
-       wrmsrl(reg2->reg, 0);
-       if (reg2->config != ~0ULL) {
-               wrmsrl(reg2->reg + 1,
-                       reg2->config & NHMEX_M_PMON_ADDR_MATCH_MASK);
-               wrmsrl(reg2->reg + 2, NHMEX_M_PMON_ADDR_MASK_MASK &
-                       (reg2->config >> NHMEX_M_PMON_ADDR_MASK_SHIFT));
-               wrmsrl(reg2->reg, NHMEX_M_PMON_MM_CFG_EN);
+       if (reg2->idx != EXTRA_REG_NONE) {
+               wrmsrl(reg2->reg, 0);
+               if (reg2->config != ~0ULL) {
+                       wrmsrl(reg2->reg + 1,
+                               reg2->config & NHMEX_M_PMON_ADDR_MATCH_MASK);
+                       wrmsrl(reg2->reg + 2, NHMEX_M_PMON_ADDR_MASK_MASK &
+                               (reg2->config >> NHMEX_M_PMON_ADDR_MASK_SHIFT));
+                       wrmsrl(reg2->reg, NHMEX_M_PMON_MM_CFG_EN);
+               }
        }
 
        wrmsrl(hwc->config_base, hwc->config | NHMEX_PMON_CTL_EN_BIT0);
 }
 
-DEFINE_UNCORE_FORMAT_ATTR(count_mode,  count_mode,     "config:2-3");
-DEFINE_UNCORE_FORMAT_ATTR(storage_mode, storage_mode,  "config:4-5");
-DEFINE_UNCORE_FORMAT_ATTR(wrap_mode,   wrap_mode,      "config:6");
-DEFINE_UNCORE_FORMAT_ATTR(flag_mode,   flag_mode,      "config:7");
-DEFINE_UNCORE_FORMAT_ATTR(inc_sel,     inc_sel,        "config:9-13");
-DEFINE_UNCORE_FORMAT_ATTR(set_flag_sel,        set_flag_sel,   "config:19-21");
-DEFINE_UNCORE_FORMAT_ATTR(filter_cfg,  filter_cfg,     "config2:63");
-DEFINE_UNCORE_FORMAT_ATTR(filter_match,        filter_match,   "config2:0-33");
-DEFINE_UNCORE_FORMAT_ATTR(filter_mask, filter_mask,    "config2:34-61");
-DEFINE_UNCORE_FORMAT_ATTR(dsp,         dsp,            "config1:0-31");
-DEFINE_UNCORE_FORMAT_ATTR(thr,         thr,            "config1:0-31");
-DEFINE_UNCORE_FORMAT_ATTR(fvc,         fvc,            "config1:0-31");
-DEFINE_UNCORE_FORMAT_ATTR(pgt,         pgt,            "config1:0-31");
-DEFINE_UNCORE_FORMAT_ATTR(map,         map,            "config1:0-31");
-DEFINE_UNCORE_FORMAT_ATTR(iss,         iss,            "config1:0-31");
-DEFINE_UNCORE_FORMAT_ATTR(pld,         pld,            "config1:32-63");
+DEFINE_UNCORE_FORMAT_ATTR(count_mode,          count_mode,     "config:2-3");
+DEFINE_UNCORE_FORMAT_ATTR(storage_mode,                storage_mode,   "config:4-5");
+DEFINE_UNCORE_FORMAT_ATTR(wrap_mode,           wrap_mode,      "config:6");
+DEFINE_UNCORE_FORMAT_ATTR(flag_mode,           flag_mode,      "config:7");
+DEFINE_UNCORE_FORMAT_ATTR(inc_sel,             inc_sel,        "config:9-13");
+DEFINE_UNCORE_FORMAT_ATTR(set_flag_sel,                set_flag_sel,   "config:19-21");
+DEFINE_UNCORE_FORMAT_ATTR(filter_cfg_en,       filter_cfg_en,  "config2:63");
+DEFINE_UNCORE_FORMAT_ATTR(filter_match,                filter_match,   "config2:0-33");
+DEFINE_UNCORE_FORMAT_ATTR(filter_mask,         filter_mask,    "config2:34-61");
+DEFINE_UNCORE_FORMAT_ATTR(dsp,                 dsp,            "config1:0-31");
+DEFINE_UNCORE_FORMAT_ATTR(thr,                 thr,            "config1:0-31");
+DEFINE_UNCORE_FORMAT_ATTR(fvc,                 fvc,            "config1:0-31");
+DEFINE_UNCORE_FORMAT_ATTR(pgt,                 pgt,            "config1:0-31");
+DEFINE_UNCORE_FORMAT_ATTR(map,                 map,            "config1:0-31");
+DEFINE_UNCORE_FORMAT_ATTR(iss,                 iss,            "config1:0-31");
+DEFINE_UNCORE_FORMAT_ATTR(pld,                 pld,            "config1:32-63");
 
 static struct attribute *nhmex_uncore_mbox_formats_attr[] = {
        &format_attr_count_mode.attr,
@@ -1458,7 +1456,7 @@ static struct attribute *nhmex_uncore_mbox_formats_attr[] = {
        &format_attr_flag_mode.attr,
        &format_attr_inc_sel.attr,
        &format_attr_set_flag_sel.attr,
-       &format_attr_filter_cfg.attr,
+       &format_attr_filter_cfg_en.attr,
        &format_attr_filter_match.attr,
        &format_attr_filter_mask.attr,
        &format_attr_dsp.attr,
@@ -1513,7 +1511,7 @@ void nhmex_rbox_alter_er(struct intel_uncore_box *box, struct perf_event *event)
        struct hw_perf_event_extra *reg1 = &hwc->extra_reg;
        int port;
 
-       /* adjust the main event selector */
+       /* adjust the main event selector and extra register index */
        if (reg1->idx % 2) {
                reg1->idx--;
                hwc->config -= 1 << NHMEX_R_PMON_CTL_EV_SEL_SHIFT;
@@ -1522,29 +1520,17 @@ void nhmex_rbox_alter_er(struct intel_uncore_box *box, struct perf_event *event)
                hwc->config += 1 << NHMEX_R_PMON_CTL_EV_SEL_SHIFT;
        }
 
-       /* adjust address or config of extra register */
+       /* adjust extra register config */
        port = reg1->idx / 6 + box->pmu->pmu_idx * 4;
        switch (reg1->idx % 6) {
-       case 0:
-               reg1->reg = NHMEX_R_MSR_PORTN_IPERF_CFG0(port);
-               break;
-       case 1:
-               reg1->reg = NHMEX_R_MSR_PORTN_IPERF_CFG1(port);
-               break;
        case 2:
-               /* the 8~15 bits to the 0~7 bits */
+               /* shift the 8~15 bits to the 0~7 bits */
                reg1->config >>= 8;
                break;
        case 3:
-               /* the 0~7 bits to the 8~15 bits */
+               /* shift the 0~7 bits to the 8~15 bits */
                reg1->config <<= 8;
                break;
-       case 4:
-               reg1->reg = NHMEX_R_MSR_PORTN_XBR_SET1_MM_CFG(port);
-               break;
-       case 5:
-               reg1->reg = NHMEX_R_MSR_PORTN_XBR_SET2_MM_CFG(port);
-               break;
        };
 }
 
@@ -1671,7 +1657,7 @@ static int nhmex_rbox_hw_config(struct intel_uncore_box *box, struct perf_event
        struct hw_perf_event *hwc = &event->hw;
        struct hw_perf_event_extra *reg1 = &event->hw.extra_reg;
        struct hw_perf_event_extra *reg2 = &event->hw.branch_reg;
-       int port, idx;
+       int idx;
 
        idx = (event->hw.config & NHMEX_R_PMON_CTL_EV_SEL_MASK) >>
                NHMEX_R_PMON_CTL_EV_SEL_SHIFT;
@@ -1681,27 +1667,11 @@ static int nhmex_rbox_hw_config(struct intel_uncore_box *box, struct perf_event
        reg1->idx = idx;
        reg1->config = event->attr.config1;
 
-       port = idx / 6 + box->pmu->pmu_idx * 4;
-       idx %= 6;
-       switch (idx) {
-       case 0:
-               reg1->reg = NHMEX_R_MSR_PORTN_IPERF_CFG0(port);
-               break;
-       case 1:
-               reg1->reg = NHMEX_R_MSR_PORTN_IPERF_CFG1(port);
-               break;
-       case 2:
-       case 3:
-               reg1->reg = NHMEX_R_MSR_PORTN_QLX_CFG(port);
-               break;
+       switch (idx % 6) {
        case 4:
        case 5:
-               if (idx == 4)
-                       reg1->reg = NHMEX_R_MSR_PORTN_XBR_SET1_MM_CFG(port);
-               else
-                       reg1->reg = NHMEX_R_MSR_PORTN_XBR_SET2_MM_CFG(port);
-               reg2->config = event->attr.config2;
                hwc->config |= event->attr.config & (~0ULL << 32);
+               reg2->config = event->attr.config2;
                break;
        };
        return 0;
@@ -1727,28 +1697,34 @@ static void nhmex_rbox_msr_enable_event(struct intel_uncore_box *box, struct per
        struct hw_perf_event *hwc = &event->hw;
        struct hw_perf_event_extra *reg1 = &hwc->extra_reg;
        struct hw_perf_event_extra *reg2 = &hwc->branch_reg;
-       int idx, er_idx;
+       int idx, port;
 
-       idx = reg1->idx % 6;
-       er_idx = idx;
-       if (er_idx > 2)
-               er_idx--;
-       er_idx += (reg1->idx / 6) * 5;
+       idx = reg1->idx;
+       port = idx / 6 + box->pmu->pmu_idx * 4;
 
-       switch (idx) {
+       switch (idx % 6) {
        case 0:
+               wrmsrl(NHMEX_R_MSR_PORTN_IPERF_CFG0(port), reg1->config);
+               break;
        case 1:
-               wrmsrl(reg1->reg, reg1->config);
+               wrmsrl(NHMEX_R_MSR_PORTN_IPERF_CFG1(port), reg1->config);
                break;
        case 2:
        case 3:
-               wrmsrl(reg1->reg, nhmex_rbox_shared_reg_config(box, er_idx));
+               wrmsrl(NHMEX_R_MSR_PORTN_QLX_CFG(port),
+                       nhmex_rbox_shared_reg_config(box, 2 + (idx / 6) * 5));
                break;
        case 4:
+               wrmsrl(NHMEX_R_MSR_PORTN_XBR_SET1_MM_CFG(port),
+                       hwc->config >> 32);
+               wrmsrl(NHMEX_R_MSR_PORTN_XBR_SET1_MATCH(port), reg1->config);
+               wrmsrl(NHMEX_R_MSR_PORTN_XBR_SET1_MASK(port), reg2->config);
+               break;
        case 5:
-               wrmsrl(reg1->reg, reg1->config);
-               wrmsrl(reg1->reg + 1, hwc->config >> 32);
-               wrmsrl(reg1->reg + 2, reg2->config);
+               wrmsrl(NHMEX_R_MSR_PORTN_XBR_SET2_MM_CFG(port),
+                       hwc->config >> 32);
+               wrmsrl(NHMEX_R_MSR_PORTN_XBR_SET2_MATCH(port), reg1->config);
+               wrmsrl(NHMEX_R_MSR_PORTN_XBR_SET2_MASK(port), reg2->config);
                break;
        };
 
@@ -1756,8 +1732,8 @@ static void nhmex_rbox_msr_enable_event(struct intel_uncore_box *box, struct per
                (hwc->config & NHMEX_R_PMON_CTL_EV_SEL_MASK));
 }
 
-DEFINE_UNCORE_FORMAT_ATTR(xbr_match, xbr_match, "config:32-63");
-DEFINE_UNCORE_FORMAT_ATTR(xbr_mm_cfg, xbr_mm_cfg, "config1:0-63");
+DEFINE_UNCORE_FORMAT_ATTR(xbr_mm_cfg, xbr_mm_cfg, "config:32-63");
+DEFINE_UNCORE_FORMAT_ATTR(xbr_match, xbr_match, "config1:0-63");
 DEFINE_UNCORE_FORMAT_ATTR(xbr_mask, xbr_mask, "config2:0-63");
 DEFINE_UNCORE_FORMAT_ATTR(qlx_cfg, qlx_cfg, "config1:0-15");
 DEFINE_UNCORE_FORMAT_ATTR(iperf_cfg, iperf_cfg, "config1:0-31");
@@ -2303,6 +2279,7 @@ int uncore_pmu_event_init(struct perf_event *event)
        event->hw.idx = -1;
        event->hw.last_tag = ~0ULL;
        event->hw.extra_reg.idx = EXTRA_REG_NONE;
+       event->hw.branch_reg.idx = EXTRA_REG_NONE;
 
        if (event->attr.config == UNCORE_FIXED_EVENT) {
                /* no fixed counter */

diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.h b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
index c9e5dc5..8384e9b 100644 (file)
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.h
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
@@ -230,6 +230,7 @@
 #define NHMEX_S1_MSR_MASK                      0xe5a
 
 #define NHMEX_S_PMON_MM_CFG_EN                 (0x1ULL << 63)
+#define NHMEX_S_EVENT_TO_R_PROG_EV             0
 
 /* NHM-EX Mbox */
 #define NHMEX_M0_MSR_GLOBAL_CTL                        0xca0