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From: tip-bot for Kan Liang <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de,
	kan.liang@linux.intel.com, mingo@kernel.org,
	peterz@infradead.org, torvalds@linux-foundation.org,
	hpa@zytor.com
Subject: [tip:perf/core] perf/x86/intel/uncore: Support MMIO type uncore blocks
Date: Mon, 17 Jun 2019 07:38:22 -0700	[thread overview]
Message-ID: <tip-3da04b8a00dd6d39970b9e764b78c5dfb40ec013@git.kernel.org> (raw)
In-Reply-To: <1556672028-119221-5-git-send-email-kan.liang@linux.intel.com>

Commit-ID:  3da04b8a00dd6d39970b9e764b78c5dfb40ec013
Gitweb:     https://git.kernel.org/tip/3da04b8a00dd6d39970b9e764b78c5dfb40ec013
Author:     Kan Liang <kan.liang@linux.intel.com>
AuthorDate: Tue, 30 Apr 2019 17:53:46 -0700
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Mon, 17 Jun 2019 12:36:20 +0200

perf/x86/intel/uncore: Support MMIO type uncore blocks

A new MMIO type uncore box is introduced on Snow Ridge server. The
counters of MMIO type uncore box can only be accessed by MMIO.

Add a new uncore type, uncore_mmio_uncores, for MMIO type uncore blocks.

Support MMIO type uncore blocks in CPU hot plug. The MMIO space has to
be map/unmap for the first/last CPU. The context also need to be
migrated if the bind CPU changes.

Add mmio_init() to init and register PMUs for MMIO type uncore blocks.

Add a helper to calculate the box_ctl address.

The helpers which calculate ctl/ctr can be shared with PCI type uncore
blocks.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: acme@kernel.org
Cc: eranian@google.com
Link: https://lkml.kernel.org/r/1556672028-119221-5-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/events/intel/uncore.c | 51 ++++++++++++++++++++++++++++++++++++------
 arch/x86/events/intel/uncore.h | 21 ++++++++++++-----
 2 files changed, 60 insertions(+), 12 deletions(-)

diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c
index 7b0c88903d47..442f30e5e49a 100644
--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -8,6 +8,7 @@
 static struct intel_uncore_type *empty_uncore[] = { NULL, };
 struct intel_uncore_type **uncore_msr_uncores = empty_uncore;
 struct intel_uncore_type **uncore_pci_uncores = empty_uncore;
+struct intel_uncore_type **uncore_mmio_uncores = empty_uncore;
 
 static bool pcidrv_registered;
 struct pci_driver *uncore_pci_driver;
@@ -1178,12 +1179,14 @@ static int uncore_event_cpu_offline(unsigned int cpu)
 		target = -1;
 
 	uncore_change_context(uncore_msr_uncores, cpu, target);
+	uncore_change_context(uncore_mmio_uncores, cpu, target);
 	uncore_change_context(uncore_pci_uncores, cpu, target);
 
 unref:
 	/* Clear the references */
 	die = topology_logical_die_id(cpu);
 	uncore_box_unref(uncore_msr_uncores, die);
+	uncore_box_unref(uncore_mmio_uncores, die);
 	return 0;
 }
 
@@ -1252,12 +1255,13 @@ static int uncore_box_ref(struct intel_uncore_type **types,
 
 static int uncore_event_cpu_online(unsigned int cpu)
 {
-	int ret, die, target;
+	int die, target, msr_ret, mmio_ret;
 
 	die = topology_logical_die_id(cpu);
-	ret = uncore_box_ref(uncore_msr_uncores, die, cpu);
-	if (ret)
-		return ret;
+	msr_ret = uncore_box_ref(uncore_msr_uncores, die, cpu);
+	mmio_ret = uncore_box_ref(uncore_mmio_uncores, die, cpu);
+	if (msr_ret && mmio_ret)
+		return -ENOMEM;
 
 	/*
 	 * Check if there is an online cpu in the package
@@ -1269,7 +1273,10 @@ static int uncore_event_cpu_online(unsigned int cpu)
 
 	cpumask_set_cpu(cpu, &uncore_cpu_mask);
 
-	uncore_change_context(uncore_msr_uncores, -1, cpu);
+	if (!msr_ret)
+		uncore_change_context(uncore_msr_uncores, -1, cpu);
+	if (!mmio_ret)
+		uncore_change_context(uncore_mmio_uncores, -1, cpu);
 	uncore_change_context(uncore_pci_uncores, -1, cpu);
 	return 0;
 }
@@ -1317,12 +1324,35 @@ err:
 	return ret;
 }
 
+static int __init uncore_mmio_init(void)
+{
+	struct intel_uncore_type **types = uncore_mmio_uncores;
+	int ret;
+
+	ret = uncore_types_init(types, true);
+	if (ret)
+		goto err;
+
+	for (; *types; types++) {
+		ret = type_pmu_register(*types);
+		if (ret)
+			goto err;
+	}
+	return 0;
+err:
+	uncore_types_exit(uncore_mmio_uncores);
+	uncore_mmio_uncores = empty_uncore;
+	return ret;
+}
+
+
 #define X86_UNCORE_MODEL_MATCH(model, init)	\
 	{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long)&init }
 
 struct intel_uncore_init_fun {
 	void	(*cpu_init)(void);
 	int	(*pci_init)(void);
+	void	(*mmio_init)(void);
 };
 
 static const struct intel_uncore_init_fun nhm_uncore_init __initconst = {
@@ -1437,7 +1467,7 @@ static int __init intel_uncore_init(void)
 {
 	const struct x86_cpu_id *id;
 	struct intel_uncore_init_fun *uncore_init;
-	int pret = 0, cret = 0, ret;
+	int pret = 0, cret = 0, mret = 0, ret;
 
 	id = x86_match_cpu(intel_uncore_match);
 	if (!id)
@@ -1460,7 +1490,12 @@ static int __init intel_uncore_init(void)
 		cret = uncore_cpu_init();
 	}
 
-	if (cret && pret)
+	if (uncore_init->mmio_init) {
+		uncore_init->mmio_init();
+		mret = uncore_mmio_init();
+	}
+
+	if (cret && pret && mret)
 		return -ENODEV;
 
 	/* Install hotplug callbacks to setup the targets for each package */
@@ -1474,6 +1509,7 @@ static int __init intel_uncore_init(void)
 
 err:
 	uncore_types_exit(uncore_msr_uncores);
+	uncore_types_exit(uncore_mmio_uncores);
 	uncore_pci_exit();
 	return ret;
 }
@@ -1483,6 +1519,7 @@ static void __exit intel_uncore_exit(void)
 {
 	cpuhp_remove_state(CPUHP_AP_PERF_X86_UNCORE_ONLINE);
 	uncore_types_exit(uncore_msr_uncores);
+	uncore_types_exit(uncore_mmio_uncores);
 	uncore_pci_exit();
 }
 module_exit(intel_uncore_exit);
diff --git a/arch/x86/events/intel/uncore.h b/arch/x86/events/intel/uncore.h
index b444ed35d6f7..fc5f48816005 100644
--- a/arch/x86/events/intel/uncore.h
+++ b/arch/x86/events/intel/uncore.h
@@ -56,7 +56,10 @@ struct intel_uncore_type {
 	unsigned fixed_ctr;
 	unsigned fixed_ctl;
 	unsigned box_ctl;
-	unsigned msr_offset;
+	union {
+		unsigned msr_offset;
+		unsigned mmio_offset;
+	};
 	unsigned num_shared_regs:8;
 	unsigned single_fixed:1;
 	unsigned pair_ctr_ctl:1;
@@ -190,6 +193,13 @@ static inline bool uncore_pmc_freerunning(int idx)
 	return idx == UNCORE_PMC_IDX_FREERUNNING;
 }
 
+static inline
+unsigned int uncore_mmio_box_ctl(struct intel_uncore_box *box)
+{
+	return box->pmu->type->box_ctl +
+	       box->pmu->type->mmio_offset * box->pmu->pmu_idx;
+}
+
 static inline unsigned uncore_pci_box_ctl(struct intel_uncore_box *box)
 {
 	return box->pmu->type->box_ctl;
@@ -330,7 +340,7 @@ unsigned uncore_msr_perf_ctr(struct intel_uncore_box *box, int idx)
 static inline
 unsigned uncore_fixed_ctl(struct intel_uncore_box *box)
 {
-	if (box->pci_dev)
+	if (box->pci_dev || box->io_addr)
 		return uncore_pci_fixed_ctl(box);
 	else
 		return uncore_msr_fixed_ctl(box);
@@ -339,7 +349,7 @@ unsigned uncore_fixed_ctl(struct intel_uncore_box *box)
 static inline
 unsigned uncore_fixed_ctr(struct intel_uncore_box *box)
 {
-	if (box->pci_dev)
+	if (box->pci_dev || box->io_addr)
 		return uncore_pci_fixed_ctr(box);
 	else
 		return uncore_msr_fixed_ctr(box);
@@ -348,7 +358,7 @@ unsigned uncore_fixed_ctr(struct intel_uncore_box *box)
 static inline
 unsigned uncore_event_ctl(struct intel_uncore_box *box, int idx)
 {
-	if (box->pci_dev)
+	if (box->pci_dev || box->io_addr)
 		return uncore_pci_event_ctl(box, idx);
 	else
 		return uncore_msr_event_ctl(box, idx);
@@ -357,7 +367,7 @@ unsigned uncore_event_ctl(struct intel_uncore_box *box, int idx)
 static inline
 unsigned uncore_perf_ctr(struct intel_uncore_box *box, int idx)
 {
-	if (box->pci_dev)
+	if (box->pci_dev || box->io_addr)
 		return uncore_pci_perf_ctr(box, idx);
 	else
 		return uncore_msr_perf_ctr(box, idx);
@@ -507,6 +517,7 @@ u64 uncore_shared_reg_config(struct intel_uncore_box *box, int idx);
 
 extern struct intel_uncore_type **uncore_msr_uncores;
 extern struct intel_uncore_type **uncore_pci_uncores;
+extern struct intel_uncore_type **uncore_mmio_uncores;
 extern struct pci_driver *uncore_pci_driver;
 extern raw_spinlock_t pci2phy_map_lock;
 extern struct list_head pci2phy_map_head;

  reply	other threads:[~2019-06-17 14:38 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-01  0:53 [RESEND PATCH 0/6] Perf uncore support for Snow Ridge server kan.liang
2019-05-01  0:53 ` [RESEND PATCH 1/6] perf/x86/intel/uncore: Handle invalid event coding for free-running counter kan.liang
2019-06-17 14:36   ` [tip:perf/core] " tip-bot for Kan Liang
2019-05-01  0:53 ` [RESEND PATCH 2/6] perf/x86/intel/uncore: Add uncore support for Snow Ridge server kan.liang
2019-06-17 14:36   ` [tip:perf/core] " tip-bot for Kan Liang
2019-05-01  0:53 ` [RESEND PATCH 3/6] perf/x86/intel/uncore: Extract codes of box ref/unref kan.liang
2019-05-08 11:51   ` Peter Zijlstra
2019-06-17 14:37   ` [tip:perf/core] perf/x86/intel/uncore: Factor out box ref/unref functions tip-bot for Kan Liang
2019-05-01  0:53 ` [RESEND PATCH 4/6] perf/x86/intel/uncore: Support MMIO type uncore blocks kan.liang
2019-06-17 14:38   ` tip-bot for Kan Liang [this message]
2019-05-01  0:53 ` [RESEND PATCH 5/6] perf/x86/intel/uncore: Clean up client IMC kan.liang
2019-06-17 14:39   ` [tip:perf/core] " tip-bot for Kan Liang
2019-05-01  0:53 ` [RESEND PATCH 6/6] perf/x86/intel/uncore: Add IMC uncore support for Snow Ridge kan.liang
2019-06-17 14:39   ` [tip:perf/core] " tip-bot for Kan Liang
2019-05-08 11:59 ` [RESEND PATCH 0/6] Perf uncore support for Snow Ridge server Peter Zijlstra
2019-06-03 16:34 ` Peter Zijlstra
2019-06-03 17:19   ` Liang, Kan

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