WIP FPC-III support

[linux/fpc-iii.git] / arch / x86 / events / intel / uncore_nhmex.c

// SPDX-License-Identifier: GPL-2.0
/* Nehalem-EX/Westmere-EX uncore support */
#include "uncore.h"

/* NHM-EX event control */
#define NHMEX_PMON_CTL_EV_SEL_MASK      0x000000ff
#define NHMEX_PMON_CTL_UMASK_MASK       0x0000ff00
#define NHMEX_PMON_CTL_EN_BIT0          (1 << 0)
#define NHMEX_PMON_CTL_EDGE_DET         (1 << 18)
#define NHMEX_PMON_CTL_PMI_EN           (1 << 20)
#define NHMEX_PMON_CTL_EN_BIT22         (1 << 22)
#define NHMEX_PMON_CTL_INVERT           (1 << 23)
#define NHMEX_PMON_CTL_TRESH_MASK       0xff000000
#define NHMEX_PMON_RAW_EVENT_MASK       (NHMEX_PMON_CTL_EV_SEL_MASK | \
                                         NHMEX_PMON_CTL_UMASK_MASK | \
                                         NHMEX_PMON_CTL_EDGE_DET | \
                                         NHMEX_PMON_CTL_INVERT | \
                                         NHMEX_PMON_CTL_TRESH_MASK)

/* NHM-EX Ubox */
#define NHMEX_U_MSR_PMON_GLOBAL_CTL             0xc00
#define NHMEX_U_MSR_PMON_CTR                    0xc11
#define NHMEX_U_MSR_PMON_EV_SEL                 0xc10

#define NHMEX_U_PMON_GLOBAL_EN                  (1 << 0)
#define NHMEX_U_PMON_GLOBAL_PMI_CORE_SEL        0x0000001e
#define NHMEX_U_PMON_GLOBAL_EN_ALL              (1 << 28)
#define NHMEX_U_PMON_GLOBAL_RST_ALL             (1 << 29)
#define NHMEX_U_PMON_GLOBAL_FRZ_ALL             (1 << 31)

#define NHMEX_U_PMON_RAW_EVENT_MASK             \
                (NHMEX_PMON_CTL_EV_SEL_MASK |   \
                 NHMEX_PMON_CTL_EDGE_DET)

/* NHM-EX Cbox */
#define NHMEX_C0_MSR_PMON_GLOBAL_CTL            0xd00
#define NHMEX_C0_MSR_PMON_CTR0                  0xd11
#define NHMEX_C0_MSR_PMON_EV_SEL0               0xd10
#define NHMEX_C_MSR_OFFSET                      0x20

/* NHM-EX Bbox */
#define NHMEX_B0_MSR_PMON_GLOBAL_CTL            0xc20
#define NHMEX_B0_MSR_PMON_CTR0                  0xc31
#define NHMEX_B0_MSR_PMON_CTL0                  0xc30
#define NHMEX_B_MSR_OFFSET                      0x40
#define NHMEX_B0_MSR_MATCH                      0xe45
#define NHMEX_B0_MSR_MASK                       0xe46
#define NHMEX_B1_MSR_MATCH                      0xe4d
#define NHMEX_B1_MSR_MASK                       0xe4e

#define NHMEX_B_PMON_CTL_EN                     (1 << 0)
#define NHMEX_B_PMON_CTL_EV_SEL_SHIFT           1
#define NHMEX_B_PMON_CTL_EV_SEL_MASK            \
                (0x1f << NHMEX_B_PMON_CTL_EV_SEL_SHIFT)
#define NHMEX_B_PMON_CTR_SHIFT          6
#define NHMEX_B_PMON_CTR_MASK           \
                (0x3 << NHMEX_B_PMON_CTR_SHIFT)
#define NHMEX_B_PMON_RAW_EVENT_MASK             \
                (NHMEX_B_PMON_CTL_EV_SEL_MASK | \
                 NHMEX_B_PMON_CTR_MASK)

/* NHM-EX Sbox */
#define NHMEX_S0_MSR_PMON_GLOBAL_CTL            0xc40
#define NHMEX_S0_MSR_PMON_CTR0                  0xc51
#define NHMEX_S0_MSR_PMON_CTL0                  0xc50
#define NHMEX_S_MSR_OFFSET                      0x80
#define NHMEX_S0_MSR_MM_CFG                     0xe48
#define NHMEX_S0_MSR_MATCH                      0xe49
#define NHMEX_S0_MSR_MASK                       0xe4a
#define NHMEX_S1_MSR_MM_CFG                     0xe58
#define NHMEX_S1_MSR_MATCH                      0xe59
#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
#define NHMEX_M0_MSR_PMU_DSP                    0xca5
#define NHMEX_M0_MSR_PMU_ISS                    0xca6
#define NHMEX_M0_MSR_PMU_MAP                    0xca7
#define NHMEX_M0_MSR_PMU_MSC_THR                0xca8
#define NHMEX_M0_MSR_PMU_PGT                    0xca9
#define NHMEX_M0_MSR_PMU_PLD                    0xcaa
#define NHMEX_M0_MSR_PMU_ZDP_CTL_FVC            0xcab
#define NHMEX_M0_MSR_PMU_CTL0                   0xcb0
#define NHMEX_M0_MSR_PMU_CNT0                   0xcb1
#define NHMEX_M_MSR_OFFSET                      0x40
#define NHMEX_M0_MSR_PMU_MM_CFG                 0xe54
#define NHMEX_M1_MSR_PMU_MM_CFG                 0xe5c

#define NHMEX_M_PMON_MM_CFG_EN                  (1ULL << 63)
#define NHMEX_M_PMON_ADDR_MATCH_MASK            0x3ffffffffULL
#define NHMEX_M_PMON_ADDR_MASK_MASK             0x7ffffffULL
#define NHMEX_M_PMON_ADDR_MASK_SHIFT            34

#define NHMEX_M_PMON_CTL_EN                     (1 << 0)
#define NHMEX_M_PMON_CTL_PMI_EN                 (1 << 1)
#define NHMEX_M_PMON_CTL_COUNT_MODE_SHIFT       2
#define NHMEX_M_PMON_CTL_COUNT_MODE_MASK        \
        (0x3 << NHMEX_M_PMON_CTL_COUNT_MODE_SHIFT)
#define NHMEX_M_PMON_CTL_STORAGE_MODE_SHIFT     4
#define NHMEX_M_PMON_CTL_STORAGE_MODE_MASK      \
        (0x3 << NHMEX_M_PMON_CTL_STORAGE_MODE_SHIFT)
#define NHMEX_M_PMON_CTL_WRAP_MODE              (1 << 6)
#define NHMEX_M_PMON_CTL_FLAG_MODE              (1 << 7)
#define NHMEX_M_PMON_CTL_INC_SEL_SHIFT          9
#define NHMEX_M_PMON_CTL_INC_SEL_MASK           \
        (0x1f << NHMEX_M_PMON_CTL_INC_SEL_SHIFT)
#define NHMEX_M_PMON_CTL_SET_FLAG_SEL_SHIFT     19
#define NHMEX_M_PMON_CTL_SET_FLAG_SEL_MASK      \
        (0x7 << NHMEX_M_PMON_CTL_SET_FLAG_SEL_SHIFT)
#define NHMEX_M_PMON_RAW_EVENT_MASK                     \
                (NHMEX_M_PMON_CTL_COUNT_MODE_MASK |     \
                 NHMEX_M_PMON_CTL_STORAGE_MODE_MASK |   \
                 NHMEX_M_PMON_CTL_WRAP_MODE |           \
                 NHMEX_M_PMON_CTL_FLAG_MODE |           \
                 NHMEX_M_PMON_CTL_INC_SEL_MASK |        \
                 NHMEX_M_PMON_CTL_SET_FLAG_SEL_MASK)

#define NHMEX_M_PMON_ZDP_CTL_FVC_MASK           (((1 << 11) - 1) | (1 << 23))
#define NHMEX_M_PMON_ZDP_CTL_FVC_EVENT_MASK(n)  (0x7ULL << (11 + 3 * (n)))

#define WSMEX_M_PMON_ZDP_CTL_FVC_MASK           (((1 << 12) - 1) | (1 << 24))
#define WSMEX_M_PMON_ZDP_CTL_FVC_EVENT_MASK(n)  (0x7ULL << (12 + 3 * (n)))

/*
 * use the 9~13 bits to select event If the 7th bit is not set,
 * otherwise use the 19~21 bits to select event.
 */
#define MBOX_INC_SEL(x) ((x) << NHMEX_M_PMON_CTL_INC_SEL_SHIFT)
#define MBOX_SET_FLAG_SEL(x) (((x) << NHMEX_M_PMON_CTL_SET_FLAG_SEL_SHIFT) | \
                                NHMEX_M_PMON_CTL_FLAG_MODE)
#define MBOX_INC_SEL_MASK (NHMEX_M_PMON_CTL_INC_SEL_MASK | \
                           NHMEX_M_PMON_CTL_FLAG_MODE)
#define MBOX_SET_FLAG_SEL_MASK (NHMEX_M_PMON_CTL_SET_FLAG_SEL_MASK | \
                                NHMEX_M_PMON_CTL_FLAG_MODE)
#define MBOX_INC_SEL_EXTAR_REG(c, r) \
                EVENT_EXTRA_REG(MBOX_INC_SEL(c), NHMEX_M0_MSR_PMU_##r, \
                                MBOX_INC_SEL_MASK, (u64)-1, NHMEX_M_##r)
#define MBOX_SET_FLAG_SEL_EXTRA_REG(c, r) \
                EVENT_EXTRA_REG(MBOX_SET_FLAG_SEL(c), NHMEX_M0_MSR_PMU_##r, \
                                MBOX_SET_FLAG_SEL_MASK, \
                                (u64)-1, NHMEX_M_##r)

/* NHM-EX Rbox */
#define NHMEX_R_MSR_GLOBAL_CTL                  0xe00
#define NHMEX_R_MSR_PMON_CTL0                   0xe10
#define NHMEX_R_MSR_PMON_CNT0                   0xe11
#define NHMEX_R_MSR_OFFSET                      0x20

#define NHMEX_R_MSR_PORTN_QLX_CFG(n)            \
                ((n) < 4 ? (0xe0c + (n)) : (0xe2c + (n) - 4))
#define NHMEX_R_MSR_PORTN_IPERF_CFG0(n)         (0xe04 + (n))
#define NHMEX_R_MSR_PORTN_IPERF_CFG1(n)         (0xe24 + (n))
#define NHMEX_R_MSR_PORTN_XBR_OFFSET(n)         \
                (((n) < 4 ? 0 : 0x10) + (n) * 4)
#define NHMEX_R_MSR_PORTN_XBR_SET1_MM_CFG(n)    \
                (0xe60 + NHMEX_R_MSR_PORTN_XBR_OFFSET(n))
#define NHMEX_R_MSR_PORTN_XBR_SET1_MATCH(n)     \
                (NHMEX_R_MSR_PORTN_XBR_SET1_MM_CFG(n) + 1)
#define NHMEX_R_MSR_PORTN_XBR_SET1_MASK(n)      \
                (NHMEX_R_MSR_PORTN_XBR_SET1_MM_CFG(n) + 2)
#define NHMEX_R_MSR_PORTN_XBR_SET2_MM_CFG(n)    \
                (0xe70 + NHMEX_R_MSR_PORTN_XBR_OFFSET(n))
#define NHMEX_R_MSR_PORTN_XBR_SET2_MATCH(n)     \
                (NHMEX_R_MSR_PORTN_XBR_SET2_MM_CFG(n) + 1)
#define NHMEX_R_MSR_PORTN_XBR_SET2_MASK(n)      \
                (NHMEX_R_MSR_PORTN_XBR_SET2_MM_CFG(n) + 2)

#define NHMEX_R_PMON_CTL_EN                     (1 << 0)
#define NHMEX_R_PMON_CTL_EV_SEL_SHIFT           1
#define NHMEX_R_PMON_CTL_EV_SEL_MASK            \
                (0x1f << NHMEX_R_PMON_CTL_EV_SEL_SHIFT)
#define NHMEX_R_PMON_CTL_PMI_EN                 (1 << 6)
#define NHMEX_R_PMON_RAW_EVENT_MASK             NHMEX_R_PMON_CTL_EV_SEL_MASK

/* NHM-EX Wbox */
#define NHMEX_W_MSR_GLOBAL_CTL                  0xc80
#define NHMEX_W_MSR_PMON_CNT0                   0xc90
#define NHMEX_W_MSR_PMON_EVT_SEL0               0xc91
#define NHMEX_W_MSR_PMON_FIXED_CTR              0x394
#define NHMEX_W_MSR_PMON_FIXED_CTL              0x395

#define NHMEX_W_PMON_GLOBAL_FIXED_EN            (1ULL << 31)

#define __BITS_VALUE(x, i, n)  ((typeof(x))(((x) >> ((i) * (n))) & \
                                ((1ULL << (n)) - 1)))

DEFINE_UNCORE_FORMAT_ATTR(event, event, "config:0-7");
DEFINE_UNCORE_FORMAT_ATTR(event5, event, "config:1-5");
DEFINE_UNCORE_FORMAT_ATTR(umask, umask, "config:8-15");
DEFINE_UNCORE_FORMAT_ATTR(edge, edge, "config:18");
DEFINE_UNCORE_FORMAT_ATTR(inv, inv, "config:23");
DEFINE_UNCORE_FORMAT_ATTR(thresh8, thresh, "config:24-31");
DEFINE_UNCORE_FORMAT_ATTR(counter, counter, "config:6-7");
DEFINE_UNCORE_FORMAT_ATTR(match, match, "config1:0-63");
DEFINE_UNCORE_FORMAT_ATTR(mask, mask, "config2:0-63");

static void nhmex_uncore_msr_init_box(struct intel_uncore_box *box)
{
        wrmsrl(NHMEX_U_MSR_PMON_GLOBAL_CTL, NHMEX_U_PMON_GLOBAL_EN_ALL);
}

static void nhmex_uncore_msr_exit_box(struct intel_uncore_box *box)
{
        wrmsrl(NHMEX_U_MSR_PMON_GLOBAL_CTL, 0);
}

static void nhmex_uncore_msr_disable_box(struct intel_uncore_box *box)
{
        unsigned msr = uncore_msr_box_ctl(box);
        u64 config;

        if (msr) {
                rdmsrl(msr, config);
                config &= ~((1ULL << uncore_num_counters(box)) - 1);
                /* WBox has a fixed counter */
                if (uncore_msr_fixed_ctl(box))
                        config &= ~NHMEX_W_PMON_GLOBAL_FIXED_EN;
                wrmsrl(msr, config);
        }
}

static void nhmex_uncore_msr_enable_box(struct intel_uncore_box *box)
{
        unsigned msr = uncore_msr_box_ctl(box);
        u64 config;

        if (msr) {
                rdmsrl(msr, config);
                config |= (1ULL << uncore_num_counters(box)) - 1;
                /* WBox has a fixed counter */
                if (uncore_msr_fixed_ctl(box))
                        config |= NHMEX_W_PMON_GLOBAL_FIXED_EN;
                wrmsrl(msr, config);
        }
}

static void nhmex_uncore_msr_disable_event(struct intel_uncore_box *box, struct perf_event *event)
{
        wrmsrl(event->hw.config_base, 0);
}

static void nhmex_uncore_msr_enable_event(struct intel_uncore_box *box, struct perf_event *event)
{
        struct hw_perf_event *hwc = &event->hw;

        if (hwc->idx == UNCORE_PMC_IDX_FIXED)
                wrmsrl(hwc->config_base, NHMEX_PMON_CTL_EN_BIT0);
        else if (box->pmu->type->event_mask & NHMEX_PMON_CTL_EN_BIT0)
                wrmsrl(hwc->config_base, hwc->config | NHMEX_PMON_CTL_EN_BIT22);
        else
                wrmsrl(hwc->config_base, hwc->config | NHMEX_PMON_CTL_EN_BIT0);
}

#define NHMEX_UNCORE_OPS_COMMON_INIT()                          \
        .init_box       = nhmex_uncore_msr_init_box,            \
        .exit_box       = nhmex_uncore_msr_exit_box,            \
        .disable_box    = nhmex_uncore_msr_disable_box,         \
        .enable_box     = nhmex_uncore_msr_enable_box,          \
        .disable_event  = nhmex_uncore_msr_disable_event,       \
        .read_counter   = uncore_msr_read_counter

static struct intel_uncore_ops nhmex_uncore_ops = {
        NHMEX_UNCORE_OPS_COMMON_INIT(),
        .enable_event   = nhmex_uncore_msr_enable_event,
};

static struct attribute *nhmex_uncore_ubox_formats_attr[] = {
        &format_attr_event.attr,
        &format_attr_edge.attr,
        NULL,
};

static const struct attribute_group nhmex_uncore_ubox_format_group = {
        .name           = "format",
        .attrs          = nhmex_uncore_ubox_formats_attr,
};

static struct intel_uncore_type nhmex_uncore_ubox = {
        .name           = "ubox",
        .num_counters   = 1,
        .num_boxes      = 1,
        .perf_ctr_bits  = 48,
        .event_ctl      = NHMEX_U_MSR_PMON_EV_SEL,
        .perf_ctr       = NHMEX_U_MSR_PMON_CTR,
        .event_mask     = NHMEX_U_PMON_RAW_EVENT_MASK,
        .box_ctl        = NHMEX_U_MSR_PMON_GLOBAL_CTL,
        .ops            = &nhmex_uncore_ops,
        .format_group   = &nhmex_uncore_ubox_format_group
};

static struct attribute *nhmex_uncore_cbox_formats_attr[] = {
        &format_attr_event.attr,
        &format_attr_umask.attr,
        &format_attr_edge.attr,
        &format_attr_inv.attr,
        &format_attr_thresh8.attr,
        NULL,
};

static const struct attribute_group nhmex_uncore_cbox_format_group = {
        .name = "format",
        .attrs = nhmex_uncore_cbox_formats_attr,
};

/* msr offset for each instance of cbox */
static unsigned nhmex_cbox_msr_offsets[] = {
        0x0, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x240, 0x2c0,
};

static struct intel_uncore_type nhmex_uncore_cbox = {
        .name                   = "cbox",
        .num_counters           = 6,
        .num_boxes              = 10,
        .perf_ctr_bits          = 48,
        .event_ctl              = NHMEX_C0_MSR_PMON_EV_SEL0,
        .perf_ctr               = NHMEX_C0_MSR_PMON_CTR0,
        .event_mask             = NHMEX_PMON_RAW_EVENT_MASK,
        .box_ctl                = NHMEX_C0_MSR_PMON_GLOBAL_CTL,
        .msr_offsets            = nhmex_cbox_msr_offsets,
        .pair_ctr_ctl           = 1,
        .ops                    = &nhmex_uncore_ops,
        .format_group           = &nhmex_uncore_cbox_format_group
};

static struct uncore_event_desc nhmex_uncore_wbox_events[] = {
        INTEL_UNCORE_EVENT_DESC(clockticks, "event=0xff,umask=0"),
        { /* end: all zeroes */ },
};

static struct intel_uncore_type nhmex_uncore_wbox = {
        .name                   = "wbox",
        .num_counters           = 4,
        .num_boxes              = 1,
        .perf_ctr_bits          = 48,
        .event_ctl              = NHMEX_W_MSR_PMON_CNT0,
        .perf_ctr               = NHMEX_W_MSR_PMON_EVT_SEL0,
        .fixed_ctr              = NHMEX_W_MSR_PMON_FIXED_CTR,
        .fixed_ctl              = NHMEX_W_MSR_PMON_FIXED_CTL,
        .event_mask             = NHMEX_PMON_RAW_EVENT_MASK,
        .box_ctl                = NHMEX_W_MSR_GLOBAL_CTL,
        .pair_ctr_ctl           = 1,
        .event_descs            = nhmex_uncore_wbox_events,
        .ops                    = &nhmex_uncore_ops,
        .format_group           = &nhmex_uncore_cbox_format_group
};

static int nhmex_bbox_hw_config(struct intel_uncore_box *box, struct perf_event *event)
{
        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 ctr, ev_sel;

        ctr = (hwc->config & NHMEX_B_PMON_CTR_MASK) >>
                NHMEX_B_PMON_CTR_SHIFT;
        ev_sel = (hwc->config & NHMEX_B_PMON_CTL_EV_SEL_MASK) >>
                  NHMEX_B_PMON_CTL_EV_SEL_SHIFT;

        /* events that do not use the match/mask registers */
        if ((ctr == 0 && ev_sel > 0x3) || (ctr == 1 && ev_sel > 0x6) ||
            (ctr == 2 && ev_sel != 0x4) || ctr == 3)
                return 0;

        if (box->pmu->pmu_idx == 0)
                reg1->reg = NHMEX_B0_MSR_MATCH;
        else
                reg1->reg = NHMEX_B1_MSR_MATCH;
        reg1->idx = 0;
        reg1->config = event->attr.config1;
        reg2->config = event->attr.config2;
        return 0;
}

static void nhmex_bbox_msr_enable_event(struct intel_uncore_box *box, struct perf_event *event)
{
        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 (reg1->idx != EXTRA_REG_NONE) {
                wrmsrl(reg1->reg, reg1->config);
                wrmsrl(reg1->reg + 1, reg2->config);
        }
        wrmsrl(hwc->config_base, NHMEX_PMON_CTL_EN_BIT0 |
                (hwc->config & NHMEX_B_PMON_CTL_EV_SEL_MASK));
}

/*
 * The Bbox has 4 counters, but each counter monitors different events.
 * Use bits 6-7 in the event config to select counter.
 */
static struct event_constraint nhmex_uncore_bbox_constraints[] = {
        EVENT_CONSTRAINT(0 , 1, 0xc0),
        EVENT_CONSTRAINT(0x40, 2, 0xc0),
        EVENT_CONSTRAINT(0x80, 4, 0xc0),
        EVENT_CONSTRAINT(0xc0, 8, 0xc0),
        EVENT_CONSTRAINT_END,
};

static struct attribute *nhmex_uncore_bbox_formats_attr[] = {
        &format_attr_event5.attr,
        &format_attr_counter.attr,
        &format_attr_match.attr,
        &format_attr_mask.attr,
        NULL,
};

static const struct attribute_group nhmex_uncore_bbox_format_group = {
        .name = "format",
        .attrs = nhmex_uncore_bbox_formats_attr,
};

static struct intel_uncore_ops nhmex_uncore_bbox_ops = {
        NHMEX_UNCORE_OPS_COMMON_INIT(),
        .enable_event           = nhmex_bbox_msr_enable_event,
        .hw_config              = nhmex_bbox_hw_config,
        .get_constraint         = uncore_get_constraint,
        .put_constraint         = uncore_put_constraint,
};

static struct intel_uncore_type nhmex_uncore_bbox = {
        .name                   = "bbox",
        .num_counters           = 4,
        .num_boxes              = 2,
        .perf_ctr_bits          = 48,
        .event_ctl              = NHMEX_B0_MSR_PMON_CTL0,
        .perf_ctr               = NHMEX_B0_MSR_PMON_CTR0,
        .event_mask             = NHMEX_B_PMON_RAW_EVENT_MASK,
        .box_ctl                = NHMEX_B0_MSR_PMON_GLOBAL_CTL,
        .msr_offset             = NHMEX_B_MSR_OFFSET,
        .pair_ctr_ctl           = 1,
        .num_shared_regs        = 1,
        .constraints            = nhmex_uncore_bbox_constraints,
        .ops                    = &nhmex_uncore_bbox_ops,
        .format_group           = &nhmex_uncore_bbox_format_group
};

static int nhmex_sbox_hw_config(struct intel_uncore_box *box, struct perf_event *event)
{
        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;

        /* 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;
}

static void nhmex_sbox_msr_enable_event(struct intel_uncore_box *box, struct perf_event *event)
{
        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 (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);
        }
        wrmsrl(hwc->config_base, hwc->config | NHMEX_PMON_CTL_EN_BIT22);
}

static struct attribute *nhmex_uncore_sbox_formats_attr[] = {
        &format_attr_event.attr,
        &format_attr_umask.attr,
        &format_attr_edge.attr,
        &format_attr_inv.attr,
        &format_attr_thresh8.attr,
        &format_attr_match.attr,
        &format_attr_mask.attr,
        NULL,
};

static const struct attribute_group nhmex_uncore_sbox_format_group = {
        .name                   = "format",
        .attrs                  = nhmex_uncore_sbox_formats_attr,
};

static struct intel_uncore_ops nhmex_uncore_sbox_ops = {
        NHMEX_UNCORE_OPS_COMMON_INIT(),
        .enable_event           = nhmex_sbox_msr_enable_event,
        .hw_config              = nhmex_sbox_hw_config,
        .get_constraint         = uncore_get_constraint,
        .put_constraint         = uncore_put_constraint,
};

static struct intel_uncore_type nhmex_uncore_sbox = {
        .name                   = "sbox",
        .num_counters           = 4,
        .num_boxes              = 2,
        .perf_ctr_bits          = 48,
        .event_ctl              = NHMEX_S0_MSR_PMON_CTL0,
        .perf_ctr               = NHMEX_S0_MSR_PMON_CTR0,
        .event_mask             = NHMEX_PMON_RAW_EVENT_MASK,
        .box_ctl                = NHMEX_S0_MSR_PMON_GLOBAL_CTL,
        .msr_offset             = NHMEX_S_MSR_OFFSET,
        .pair_ctr_ctl           = 1,
        .num_shared_regs        = 1,
        .ops                    = &nhmex_uncore_sbox_ops,
        .format_group           = &nhmex_uncore_sbox_format_group
};

enum {
        EXTRA_REG_NHMEX_M_FILTER,
        EXTRA_REG_NHMEX_M_DSP,
        EXTRA_REG_NHMEX_M_ISS,
        EXTRA_REG_NHMEX_M_MAP,
        EXTRA_REG_NHMEX_M_MSC_THR,
        EXTRA_REG_NHMEX_M_PGT,
        EXTRA_REG_NHMEX_M_PLD,
        EXTRA_REG_NHMEX_M_ZDP_CTL_FVC,
};

static struct extra_reg nhmex_uncore_mbox_extra_regs[] = {
        MBOX_INC_SEL_EXTAR_REG(0x0, DSP),
        MBOX_INC_SEL_EXTAR_REG(0x4, MSC_THR),
        MBOX_INC_SEL_EXTAR_REG(0x5, MSC_THR),
        MBOX_INC_SEL_EXTAR_REG(0x9, ISS),
        /* event 0xa uses two extra registers */
        MBOX_INC_SEL_EXTAR_REG(0xa, ISS),
        MBOX_INC_SEL_EXTAR_REG(0xa, PLD),
        MBOX_INC_SEL_EXTAR_REG(0xb, PLD),
        /* events 0xd ~ 0x10 use the same extra register */
        MBOX_INC_SEL_EXTAR_REG(0xd, ZDP_CTL_FVC),
        MBOX_INC_SEL_EXTAR_REG(0xe, ZDP_CTL_FVC),
        MBOX_INC_SEL_EXTAR_REG(0xf, ZDP_CTL_FVC),
        MBOX_INC_SEL_EXTAR_REG(0x10, ZDP_CTL_FVC),
        MBOX_INC_SEL_EXTAR_REG(0x16, PGT),
        MBOX_SET_FLAG_SEL_EXTRA_REG(0x0, DSP),
        MBOX_SET_FLAG_SEL_EXTRA_REG(0x1, ISS),
        MBOX_SET_FLAG_SEL_EXTRA_REG(0x5, PGT),
        MBOX_SET_FLAG_SEL_EXTRA_REG(0x6, MAP),
        EVENT_EXTRA_END
};

/* Nehalem-EX or Westmere-EX ? */
static bool uncore_nhmex;

static bool nhmex_mbox_get_shared_reg(struct intel_uncore_box *box, int idx, u64 config)
{
        struct intel_uncore_extra_reg *er;
        unsigned long flags;
        bool ret = false;
        u64 mask;

        if (idx < EXTRA_REG_NHMEX_M_ZDP_CTL_FVC) {
                er = &box->shared_regs[idx];
                raw_spin_lock_irqsave(&er->lock, flags);
                if (!atomic_read(&er->ref) || er->config == config) {
                        atomic_inc(&er->ref);
                        er->config = config;
                        ret = true;
                }
                raw_spin_unlock_irqrestore(&er->lock, flags);

                return ret;
        }
        /*
         * The ZDP_CTL_FVC MSR has 4 fields which are used to control
         * events 0xd ~ 0x10. Besides these 4 fields, there are additional
         * fields which are shared.
         */
        idx -= EXTRA_REG_NHMEX_M_ZDP_CTL_FVC;
        if (WARN_ON_ONCE(idx >= 4))
                return false;

        /* mask of the shared fields */
        if (uncore_nhmex)
                mask = NHMEX_M_PMON_ZDP_CTL_FVC_MASK;
        else
                mask = WSMEX_M_PMON_ZDP_CTL_FVC_MASK;
        er = &box->shared_regs[EXTRA_REG_NHMEX_M_ZDP_CTL_FVC];

        raw_spin_lock_irqsave(&er->lock, flags);
        /* add mask of the non-shared field if it's in use */
        if (__BITS_VALUE(atomic_read(&er->ref), idx, 8)) {
                if (uncore_nhmex)
                        mask |= NHMEX_M_PMON_ZDP_CTL_FVC_EVENT_MASK(idx);
                else
                        mask |= WSMEX_M_PMON_ZDP_CTL_FVC_EVENT_MASK(idx);
        }

        if (!atomic_read(&er->ref) || !((er->config ^ config) & mask)) {
                atomic_add(1 << (idx * 8), &er->ref);
                if (uncore_nhmex)
                        mask = NHMEX_M_PMON_ZDP_CTL_FVC_MASK |
                                NHMEX_M_PMON_ZDP_CTL_FVC_EVENT_MASK(idx);
                else
                        mask = WSMEX_M_PMON_ZDP_CTL_FVC_MASK |
                                WSMEX_M_PMON_ZDP_CTL_FVC_EVENT_MASK(idx);
                er->config &= ~mask;
                er->config |= (config & mask);
                ret = true;
        }
        raw_spin_unlock_irqrestore(&er->lock, flags);

        return ret;
}

static void nhmex_mbox_put_shared_reg(struct intel_uncore_box *box, int idx)
{
        struct intel_uncore_extra_reg *er;

        if (idx < EXTRA_REG_NHMEX_M_ZDP_CTL_FVC) {
                er = &box->shared_regs[idx];
                atomic_dec(&er->ref);
                return;
        }

        idx -= EXTRA_REG_NHMEX_M_ZDP_CTL_FVC;
        er = &box->shared_regs[EXTRA_REG_NHMEX_M_ZDP_CTL_FVC];
        atomic_sub(1 << (idx * 8), &er->ref);
}

static u64 nhmex_mbox_alter_er(struct perf_event *event, int new_idx, bool modify)
{
        struct hw_perf_event *hwc = &event->hw;
        struct hw_perf_event_extra *reg1 = &hwc->extra_reg;
        u64 idx, orig_idx = __BITS_VALUE(reg1->idx, 0, 8);
        u64 config = reg1->config;

        /* get the non-shared control bits and shift them */
        idx = orig_idx - EXTRA_REG_NHMEX_M_ZDP_CTL_FVC;
        if (uncore_nhmex)
                config &= NHMEX_M_PMON_ZDP_CTL_FVC_EVENT_MASK(idx);
        else
                config &= WSMEX_M_PMON_ZDP_CTL_FVC_EVENT_MASK(idx);
        if (new_idx > orig_idx) {
                idx = new_idx - orig_idx;
                config <<= 3 * idx;
        } else {
                idx = orig_idx - new_idx;
                config >>= 3 * idx;
        }

        /* add the shared control bits back */
        if (uncore_nhmex)
                config |= NHMEX_M_PMON_ZDP_CTL_FVC_MASK & reg1->config;
        else
                config |= WSMEX_M_PMON_ZDP_CTL_FVC_MASK & reg1->config;
        config |= NHMEX_M_PMON_ZDP_CTL_FVC_MASK & reg1->config;
        if (modify) {
                /* adjust the main event selector */
                if (new_idx > orig_idx)
                        hwc->config += idx << NHMEX_M_PMON_CTL_INC_SEL_SHIFT;
                else
                        hwc->config -= idx << NHMEX_M_PMON_CTL_INC_SEL_SHIFT;
                reg1->config = config;
                reg1->idx = ~0xff | new_idx;
        }
        return config;
}

static struct event_constraint *
nhmex_mbox_get_constraint(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;
        int i, idx[2], alloc = 0;
        u64 config1 = reg1->config;

        idx[0] = __BITS_VALUE(reg1->idx, 0, 8);
        idx[1] = __BITS_VALUE(reg1->idx, 1, 8);
again:
        for (i = 0; i < 2; i++) {
                if (!uncore_box_is_fake(box) && (reg1->alloc & (0x1 << i)))
                        idx[i] = 0xff;

                if (idx[i] == 0xff)
                        continue;

                if (!nhmex_mbox_get_shared_reg(box, idx[i],
                                __BITS_VALUE(config1, i, 32)))
                        goto fail;
                alloc |= (0x1 << i);
        }

        /* for the match/mask registers */
        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;

        /*
         * If it's a fake box -- as per validate_{group,event}() we
         * shouldn't touch event state and we can avoid doing so
         * since both will only call get_event_constraints() once
         * on each event, this avoids the need for reg->alloc.
         */
        if (!uncore_box_is_fake(box)) {
                if (idx[0] != 0xff && idx[0] != __BITS_VALUE(reg1->idx, 0, 8))
                        nhmex_mbox_alter_er(event, idx[0], true);
                reg1->alloc |= alloc;
                if (reg2->idx != EXTRA_REG_NONE)
                        reg2->alloc = 1;
        }
        return NULL;
fail:
        if (idx[0] != 0xff && !(alloc & 0x1) &&
            idx[0] >= EXTRA_REG_NHMEX_M_ZDP_CTL_FVC) {
                /*
                 * events 0xd ~ 0x10 are functional identical, but are
                 * controlled by different fields in the ZDP_CTL_FVC
                 * register. If we failed to take one field, try the
                 * rest 3 choices.
                 */
                BUG_ON(__BITS_VALUE(reg1->idx, 1, 8) != 0xff);
                idx[0] -= EXTRA_REG_NHMEX_M_ZDP_CTL_FVC;
                idx[0] = (idx[0] + 1) % 4;
                idx[0] += EXTRA_REG_NHMEX_M_ZDP_CTL_FVC;
                if (idx[0] != __BITS_VALUE(reg1->idx, 0, 8)) {
                        config1 = nhmex_mbox_alter_er(event, idx[0], false);
                        goto again;
                }
        }

        if (alloc & 0x1)
                nhmex_mbox_put_shared_reg(box, idx[0]);
        if (alloc & 0x2)
                nhmex_mbox_put_shared_reg(box, idx[1]);
        return &uncore_constraint_empty;
}

static void nhmex_mbox_put_constraint(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;

        if (uncore_box_is_fake(box))
                return;

        if (reg1->alloc & 0x1)
                nhmex_mbox_put_shared_reg(box, __BITS_VALUE(reg1->idx, 0, 8));
        if (reg1->alloc & 0x2)
                nhmex_mbox_put_shared_reg(box, __BITS_VALUE(reg1->idx, 1, 8));
        reg1->alloc = 0;

        if (reg2->alloc) {
                nhmex_mbox_put_shared_reg(box, reg2->idx);
                reg2->alloc = 0;
        }
}

static int nhmex_mbox_extra_reg_idx(struct extra_reg *er)
{
        if (er->idx < EXTRA_REG_NHMEX_M_ZDP_CTL_FVC)
                return er->idx;
        return er->idx + (er->event >> NHMEX_M_PMON_CTL_INC_SEL_SHIFT) - 0xd;
}

static int nhmex_mbox_hw_config(struct intel_uncore_box *box, struct perf_event *event)
{
        struct intel_uncore_type *type = box->pmu->type;
        struct hw_perf_event_extra *reg1 = &event->hw.extra_reg;
        struct hw_perf_event_extra *reg2 = &event->hw.branch_reg;
        struct extra_reg *er;
        unsigned msr;
        int reg_idx = 0;
        /*
         * 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
         * config1 to pass two MSRs' config.
         */
        for (er = nhmex_uncore_mbox_extra_regs; er->msr; er++) {
                if (er->event != (event->hw.config & er->config_mask))
                        continue;
                if (event->attr.config1 & ~er->valid_mask)
                        return -EINVAL;

                msr = er->msr + type->msr_offset * box->pmu->pmu_idx;
                if (WARN_ON_ONCE(msr >= 0xffff || er->idx >= 0xff))
                        return -EINVAL;

                /* 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));
                reg1->idx |= nhmex_mbox_extra_reg_idx(er) << (reg_idx * 8);
                reg1->reg |= msr << (reg_idx * 16);
                reg1->config = event->attr.config1;
                reg_idx++;
        }
        /*
         * 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;
}

static u64 nhmex_mbox_shared_reg_config(struct intel_uncore_box *box, int idx)
{
        struct intel_uncore_extra_reg *er;
        unsigned long flags;
        u64 config;

        if (idx < EXTRA_REG_NHMEX_M_ZDP_CTL_FVC)
                return box->shared_regs[idx].config;

        er = &box->shared_regs[EXTRA_REG_NHMEX_M_ZDP_CTL_FVC];
        raw_spin_lock_irqsave(&er->lock, flags);
        config = er->config;
        raw_spin_unlock_irqrestore(&er->lock, flags);
        return config;
}

static void nhmex_mbox_msr_enable_event(struct intel_uncore_box *box, struct perf_event *event)
{
        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;

        idx = __BITS_VALUE(reg1->idx, 0, 8);
        if (idx != 0xff)
                wrmsrl(__BITS_VALUE(reg1->reg, 0, 16),
                        nhmex_mbox_shared_reg_config(box, idx));
        idx = __BITS_VALUE(reg1->idx, 1, 8);
        if (idx != 0xff)
                wrmsrl(__BITS_VALUE(reg1->reg, 1, 16),
                        nhmex_mbox_shared_reg_config(box, idx));

        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_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,
        &format_attr_storage_mode.attr,
        &format_attr_wrap_mode.attr,
        &format_attr_flag_mode.attr,
        &format_attr_inc_sel.attr,
        &format_attr_set_flag_sel.attr,
        &format_attr_filter_cfg_en.attr,
        &format_attr_filter_match.attr,
        &format_attr_filter_mask.attr,
        &format_attr_dsp.attr,
        &format_attr_thr.attr,
        &format_attr_fvc.attr,
        &format_attr_pgt.attr,
        &format_attr_map.attr,
        &format_attr_iss.attr,
        &format_attr_pld.attr,
        NULL,
};

static const struct attribute_group nhmex_uncore_mbox_format_group = {
        .name           = "format",
        .attrs          = nhmex_uncore_mbox_formats_attr,
};

static struct uncore_event_desc nhmex_uncore_mbox_events[] = {
        INTEL_UNCORE_EVENT_DESC(bbox_cmds_read, "inc_sel=0xd,fvc=0x2800"),
        INTEL_UNCORE_EVENT_DESC(bbox_cmds_write, "inc_sel=0xd,fvc=0x2820"),
        { /* end: all zeroes */ },
};

static struct uncore_event_desc wsmex_uncore_mbox_events[] = {
        INTEL_UNCORE_EVENT_DESC(bbox_cmds_read, "inc_sel=0xd,fvc=0x5000"),
        INTEL_UNCORE_EVENT_DESC(bbox_cmds_write, "inc_sel=0xd,fvc=0x5040"),
        { /* end: all zeroes */ },
};

static struct intel_uncore_ops nhmex_uncore_mbox_ops = {
        NHMEX_UNCORE_OPS_COMMON_INIT(),
        .enable_event   = nhmex_mbox_msr_enable_event,
        .hw_config      = nhmex_mbox_hw_config,
        .get_constraint = nhmex_mbox_get_constraint,
        .put_constraint = nhmex_mbox_put_constraint,
};

static struct intel_uncore_type nhmex_uncore_mbox = {
        .name                   = "mbox",
        .num_counters           = 6,
        .num_boxes              = 2,
        .perf_ctr_bits          = 48,
        .event_ctl              = NHMEX_M0_MSR_PMU_CTL0,
        .perf_ctr               = NHMEX_M0_MSR_PMU_CNT0,
        .event_mask             = NHMEX_M_PMON_RAW_EVENT_MASK,
        .box_ctl                = NHMEX_M0_MSR_GLOBAL_CTL,
        .msr_offset             = NHMEX_M_MSR_OFFSET,
        .pair_ctr_ctl           = 1,
        .num_shared_regs        = 8,
        .event_descs            = nhmex_uncore_mbox_events,
        .ops                    = &nhmex_uncore_mbox_ops,
        .format_group           = &nhmex_uncore_mbox_format_group,
};

static void nhmex_rbox_alter_er(struct intel_uncore_box *box, struct perf_event *event)
{
        struct hw_perf_event *hwc = &event->hw;
        struct hw_perf_event_extra *reg1 = &hwc->extra_reg;

        /* 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;
        } else {
                reg1->idx++;
                hwc->config += 1 << NHMEX_R_PMON_CTL_EV_SEL_SHIFT;
        }

        /* adjust extra register config */
        switch (reg1->idx % 6) {
        case 2:
                /* shift the 8~15 bits to the 0~7 bits */
                reg1->config >>= 8;
                break;
        case 3:
                /* shift the 0~7 bits to the 8~15 bits */
                reg1->config <<= 8;
                break;
        }
}

/*
 * Each rbox has 4 event set which monitor PQI port 0~3 or 4~7.
 * An event set consists of 6 events, the 3rd and 4th events in
 * an event set use the same extra register. So an event set uses
 * 5 extra registers.
 */
static struct event_constraint *
nhmex_rbox_get_constraint(struct intel_uncore_box *box, struct perf_event *event)
{
        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;
        struct intel_uncore_extra_reg *er;
        unsigned long flags;
        int idx, er_idx;
        u64 config1;
        bool ok = false;

        if (!uncore_box_is_fake(box) && reg1->alloc)
                return NULL;

        idx = reg1->idx % 6;
        config1 = reg1->config;
again:
        er_idx = idx;
        /* the 3rd and 4th events use the same extra register */
        if (er_idx > 2)
                er_idx--;
        er_idx += (reg1->idx / 6) * 5;

        er = &box->shared_regs[er_idx];
        raw_spin_lock_irqsave(&er->lock, flags);
        if (idx < 2) {
                if (!atomic_read(&er->ref) || er->config == reg1->config) {
                        atomic_inc(&er->ref);
                        er->config = reg1->config;
                        ok = true;
                }
        } else if (idx == 2 || idx == 3) {
                /*
                 * these two events use different fields in a extra register,
                 * the 0~7 bits and the 8~15 bits respectively.
                 */
                u64 mask = 0xff << ((idx - 2) * 8);
                if (!__BITS_VALUE(atomic_read(&er->ref), idx - 2, 8) ||
                                !((er->config ^ config1) & mask)) {
                        atomic_add(1 << ((idx - 2) * 8), &er->ref);
                        er->config &= ~mask;
                        er->config |= config1 & mask;
                        ok = true;
                }
        } else {
                if (!atomic_read(&er->ref) ||
                                (er->config == (hwc->config >> 32) &&
                                 er->config1 == reg1->config &&
                                 er->config2 == reg2->config)) {
                        atomic_inc(&er->ref);
                        er->config = (hwc->config >> 32);
                        er->config1 = reg1->config;
                        er->config2 = reg2->config;
                        ok = true;
                }
        }
        raw_spin_unlock_irqrestore(&er->lock, flags);

        if (!ok) {
                /*
                 * The Rbox events are always in pairs. The paired
                 * events are functional identical, but use different
                 * extra registers. If we failed to take an extra
                 * register, try the alternative.
                 */
                idx ^= 1;
                if (idx != reg1->idx % 6) {
                        if (idx == 2)
                                config1 >>= 8;
                        else if (idx == 3)
                                config1 <<= 8;
                        goto again;
                }
        } else {
                if (!uncore_box_is_fake(box)) {
                        if (idx != reg1->idx % 6)
                                nhmex_rbox_alter_er(box, event);
                        reg1->alloc = 1;
                }
                return NULL;
        }
        return &uncore_constraint_empty;
}

static void nhmex_rbox_put_constraint(struct intel_uncore_box *box, struct perf_event *event)
{
        struct intel_uncore_extra_reg *er;
        struct hw_perf_event_extra *reg1 = &event->hw.extra_reg;
        int idx, er_idx;

        if (uncore_box_is_fake(box) || !reg1->alloc)
                return;

        idx = reg1->idx % 6;
        er_idx = idx;
        if (er_idx > 2)
                er_idx--;
        er_idx += (reg1->idx / 6) * 5;

        er = &box->shared_regs[er_idx];
        if (idx == 2 || idx == 3)
                atomic_sub(1 << ((idx - 2) * 8), &er->ref);
        else
                atomic_dec(&er->ref);

        reg1->alloc = 0;
}

static int nhmex_rbox_hw_config(struct intel_uncore_box *box, struct perf_event *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 idx;

        idx = (event->hw.config & NHMEX_R_PMON_CTL_EV_SEL_MASK) >>
                NHMEX_R_PMON_CTL_EV_SEL_SHIFT;
        if (idx >= 0x18)
                return -EINVAL;

        reg1->idx = idx;
        reg1->config = event->attr.config1;

        switch (idx % 6) {
        case 4:
        case 5:
                hwc->config |= event->attr.config & (~0ULL << 32);
                reg2->config = event->attr.config2;
                break;
        }
        return 0;
}

static void nhmex_rbox_msr_enable_event(struct intel_uncore_box *box, struct perf_event *event)
{
        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, port;

        idx = reg1->idx;
        port = idx / 6 + box->pmu->pmu_idx * 4;

        switch (idx % 6) {
        case 0:
                wrmsrl(NHMEX_R_MSR_PORTN_IPERF_CFG0(port), reg1->config);
                break;
        case 1:
                wrmsrl(NHMEX_R_MSR_PORTN_IPERF_CFG1(port), reg1->config);
                break;
        case 2:
        case 3:
                wrmsrl(NHMEX_R_MSR_PORTN_QLX_CFG(port),
                        uncore_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(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;
        }

        wrmsrl(hwc->config_base, NHMEX_PMON_CTL_EN_BIT0 |
                (hwc->config & NHMEX_R_PMON_CTL_EV_SEL_MASK));
}

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");

static struct attribute *nhmex_uncore_rbox_formats_attr[] = {
        &format_attr_event5.attr,
        &format_attr_xbr_mm_cfg.attr,
        &format_attr_xbr_match.attr,
        &format_attr_xbr_mask.attr,
        &format_attr_qlx_cfg.attr,
        &format_attr_iperf_cfg.attr,
        NULL,
};

static const struct attribute_group nhmex_uncore_rbox_format_group = {
        .name = "format",
        .attrs = nhmex_uncore_rbox_formats_attr,
};

static struct uncore_event_desc nhmex_uncore_rbox_events[] = {
        INTEL_UNCORE_EVENT_DESC(qpi0_flit_send,         "event=0x0,iperf_cfg=0x80000000"),
        INTEL_UNCORE_EVENT_DESC(qpi1_filt_send,         "event=0x6,iperf_cfg=0x80000000"),
        INTEL_UNCORE_EVENT_DESC(qpi0_idle_filt,         "event=0x0,iperf_cfg=0x40000000"),
        INTEL_UNCORE_EVENT_DESC(qpi1_idle_filt,         "event=0x6,iperf_cfg=0x40000000"),
        INTEL_UNCORE_EVENT_DESC(qpi0_date_response,     "event=0x0,iperf_cfg=0xc4"),
        INTEL_UNCORE_EVENT_DESC(qpi1_date_response,     "event=0x6,iperf_cfg=0xc4"),
        { /* end: all zeroes */ },
};

static struct intel_uncore_ops nhmex_uncore_rbox_ops = {
        NHMEX_UNCORE_OPS_COMMON_INIT(),
        .enable_event           = nhmex_rbox_msr_enable_event,
        .hw_config              = nhmex_rbox_hw_config,
        .get_constraint         = nhmex_rbox_get_constraint,
        .put_constraint         = nhmex_rbox_put_constraint,
};

static struct intel_uncore_type nhmex_uncore_rbox = {
        .name                   = "rbox",
        .num_counters           = 8,
        .num_boxes              = 2,
        .perf_ctr_bits          = 48,
        .event_ctl              = NHMEX_R_MSR_PMON_CTL0,
        .perf_ctr               = NHMEX_R_MSR_PMON_CNT0,
        .event_mask             = NHMEX_R_PMON_RAW_EVENT_MASK,
        .box_ctl                = NHMEX_R_MSR_GLOBAL_CTL,
        .msr_offset             = NHMEX_R_MSR_OFFSET,
        .pair_ctr_ctl           = 1,
        .num_shared_regs        = 20,
        .event_descs            = nhmex_uncore_rbox_events,
        .ops                    = &nhmex_uncore_rbox_ops,
        .format_group           = &nhmex_uncore_rbox_format_group
};

static struct intel_uncore_type *nhmex_msr_uncores[] = {
        &nhmex_uncore_ubox,
        &nhmex_uncore_cbox,
        &nhmex_uncore_bbox,
        &nhmex_uncore_sbox,
        &nhmex_uncore_mbox,
        &nhmex_uncore_rbox,
        &nhmex_uncore_wbox,
        NULL,
};

void nhmex_uncore_cpu_init(void)
{
        if (boot_cpu_data.x86_model == 46)
                uncore_nhmex = true;
        else
                nhmex_uncore_mbox.event_descs = wsmex_uncore_mbox_events;
        if (nhmex_uncore_cbox.num_boxes > boot_cpu_data.x86_max_cores)
                nhmex_uncore_cbox.num_boxes = boot_cpu_data.x86_max_cores;
        uncore_msr_uncores = nhmex_msr_uncores;
}
/* end of Nehalem-EX uncore support */