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Subject[tip: perf/core] perf/x86/intel/uncore: Add Sapphire Rapids server CHA support
The following commit has been merged into the perf/core branch of tip:

Commit-ID: 949b11381f81664df3997db2ae0ec9546ab6dd85
Gitweb: https://git.kernel.org/tip/949b11381f81664df3997db2ae0ec9546ab6dd85
Author: Kan Liang <kan.liang@linux.intel.com>
AuthorDate: Wed, 30 Jun 2021 14:08:26 -07:00
Committer: Peter Zijlstra <peterz@infradead.org>
CommitterDate: Fri, 02 Jul 2021 15:58:37 +02:00

perf/x86/intel/uncore: Add Sapphire Rapids server CHA support

CHA merges the caching agent and Home Agent (HA) responsibilities of the
chip into a single block. It's one of the Sapphire Rapids server uncore
units.

The layout of the control registers for a CHA uncore unit is a little
bit different from the generic one. The CHA uncore unit also supports a
filter register for TID. So a specific format and ops are required.
Expose the common MSR ops which can be reused.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Link: https://lore.kernel.org/r/1625087320-194204-3-git-send-email-kan.liang@linux.intel.com
---
arch/x86/events/intel/uncore_discovery.c | 6 +-
arch/x86/events/intel/uncore_discovery.h | 4 +-
arch/x86/events/intel/uncore_snbep.c | 90 ++++++++++++++++++++++-
3 files changed, 96 insertions(+), 4 deletions(-)

diff --git a/arch/x86/events/intel/uncore_discovery.c b/arch/x86/events/intel/uncore_discovery.c
index 93148e2..25f1c01 100644
--- a/arch/x86/events/intel/uncore_discovery.c
+++ b/arch/x86/events/intel/uncore_discovery.c
@@ -337,17 +337,17 @@ static const struct attribute_group generic_uncore_format_group = {
.attrs = generic_uncore_formats_attr,
};

-static void intel_generic_uncore_msr_init_box(struct intel_uncore_box *box)
+void intel_generic_uncore_msr_init_box(struct intel_uncore_box *box)
{
wrmsrl(uncore_msr_box_ctl(box), GENERIC_PMON_BOX_CTL_INT);
}

-static void intel_generic_uncore_msr_disable_box(struct intel_uncore_box *box)
+void intel_generic_uncore_msr_disable_box(struct intel_uncore_box *box)
{
wrmsrl(uncore_msr_box_ctl(box), GENERIC_PMON_BOX_CTL_FRZ);
}

-static void intel_generic_uncore_msr_enable_box(struct intel_uncore_box *box)
+void intel_generic_uncore_msr_enable_box(struct intel_uncore_box *box)
{
wrmsrl(uncore_msr_box_ctl(box), 0);
}
diff --git a/arch/x86/events/intel/uncore_discovery.h b/arch/x86/events/intel/uncore_discovery.h
index d7ccc8a..e836a68 100644
--- a/arch/x86/events/intel/uncore_discovery.h
+++ b/arch/x86/events/intel/uncore_discovery.h
@@ -130,5 +130,9 @@ void intel_uncore_generic_uncore_cpu_init(void);
int intel_uncore_generic_uncore_pci_init(void);
void intel_uncore_generic_uncore_mmio_init(void);

+void intel_generic_uncore_msr_init_box(struct intel_uncore_box *box);
+void intel_generic_uncore_msr_disable_box(struct intel_uncore_box *box);
+void intel_generic_uncore_msr_enable_box(struct intel_uncore_box *box);
+
struct intel_uncore_type **
intel_uncore_generic_init_uncores(enum uncore_access_type type_id);
diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c
index c100616..8a470d2 100644
--- a/arch/x86/events/intel/uncore_snbep.c
+++ b/arch/x86/events/intel/uncore_snbep.c
@@ -455,6 +455,17 @@
#define ICX_NUMBER_IMC_CHN 2
#define ICX_IMC_MEM_STRIDE 0x4

+/* SPR */
+#define SPR_RAW_EVENT_MASK_EXT 0xffffff
+
+/* SPR CHA */
+#define SPR_CHA_PMON_CTL_TID_EN (1 << 16)
+#define SPR_CHA_PMON_EVENT_MASK (SNBEP_PMON_RAW_EVENT_MASK | \
+ SPR_CHA_PMON_CTL_TID_EN)
+#define SPR_CHA_PMON_BOX_FILTER_TID 0x3ff
+
+#define SPR_C0_MSR_PMON_BOX_FILTER0 0x200e
+
DEFINE_UNCORE_FORMAT_ATTR(event, event, "config:0-7");
DEFINE_UNCORE_FORMAT_ATTR(event2, event, "config:0-6");
DEFINE_UNCORE_FORMAT_ATTR(event_ext, event, "config:0-7,21");
@@ -467,6 +478,7 @@ DEFINE_UNCORE_FORMAT_ATTR(umask_ext4, umask, "config:8-15,32-55");
DEFINE_UNCORE_FORMAT_ATTR(qor, qor, "config:16");
DEFINE_UNCORE_FORMAT_ATTR(edge, edge, "config:18");
DEFINE_UNCORE_FORMAT_ATTR(tid_en, tid_en, "config:19");
+DEFINE_UNCORE_FORMAT_ATTR(tid_en2, tid_en, "config:16");
DEFINE_UNCORE_FORMAT_ATTR(inv, inv, "config:23");
DEFINE_UNCORE_FORMAT_ATTR(thresh9, thresh, "config:24-35");
DEFINE_UNCORE_FORMAT_ATTR(thresh8, thresh, "config:24-31");
@@ -5508,10 +5520,86 @@ void icx_uncore_mmio_init(void)

/* SPR uncore support */

+static void spr_uncore_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;
+
+ if (reg1->idx != EXTRA_REG_NONE)
+ wrmsrl(reg1->reg, reg1->config);
+
+ wrmsrl(hwc->config_base, hwc->config);
+}
+
+static void spr_uncore_msr_disable_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;
+
+ if (reg1->idx != EXTRA_REG_NONE)
+ wrmsrl(reg1->reg, 0);
+
+ wrmsrl(hwc->config_base, 0);
+}
+
+static int spr_cha_hw_config(struct intel_uncore_box *box, struct perf_event *event)
+{
+ struct hw_perf_event_extra *reg1 = &event->hw.extra_reg;
+ bool tie_en = !!(event->hw.config & SPR_CHA_PMON_CTL_TID_EN);
+ struct intel_uncore_type *type = box->pmu->type;
+
+ if (tie_en) {
+ reg1->reg = SPR_C0_MSR_PMON_BOX_FILTER0 +
+ HSWEP_CBO_MSR_OFFSET * type->box_ids[box->pmu->pmu_idx];
+ reg1->config = event->attr.config1 & SPR_CHA_PMON_BOX_FILTER_TID;
+ reg1->idx = 0;
+ }
+
+ return 0;
+}
+
+static struct intel_uncore_ops spr_uncore_chabox_ops = {
+ .init_box = intel_generic_uncore_msr_init_box,
+ .disable_box = intel_generic_uncore_msr_disable_box,
+ .enable_box = intel_generic_uncore_msr_enable_box,
+ .disable_event = spr_uncore_msr_disable_event,
+ .enable_event = spr_uncore_msr_enable_event,
+ .read_counter = uncore_msr_read_counter,
+ .hw_config = spr_cha_hw_config,
+ .get_constraint = uncore_get_constraint,
+ .put_constraint = uncore_put_constraint,
+};
+
+static struct attribute *spr_uncore_cha_formats_attr[] = {
+ &format_attr_event.attr,
+ &format_attr_umask_ext4.attr,
+ &format_attr_tid_en2.attr,
+ &format_attr_edge.attr,
+ &format_attr_inv.attr,
+ &format_attr_thresh8.attr,
+ &format_attr_filter_tid5.attr,
+ NULL,
+};
+static const struct attribute_group spr_uncore_chabox_format_group = {
+ .name = "format",
+ .attrs = spr_uncore_cha_formats_attr,
+};
+
+static struct intel_uncore_type spr_uncore_chabox = {
+ .name = "cha",
+ .event_mask = SPR_CHA_PMON_EVENT_MASK,
+ .event_mask_ext = SPR_RAW_EVENT_MASK_EXT,
+ .num_shared_regs = 1,
+ .ops = &spr_uncore_chabox_ops,
+ .format_group = &spr_uncore_chabox_format_group,
+};
+
#define UNCORE_SPR_NUM_UNCORE_TYPES 12

static struct intel_uncore_type *spr_uncores[UNCORE_SPR_NUM_UNCORE_TYPES] = {
- NULL,
+ &spr_uncore_chabox,
NULL,
NULL,
NULL,
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