Merge tag 'x86_cache_for_v7.0_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 resource control updates from Borislav Petkov:

 - Extend the resctrl machinery to support telemetry monitoring on
   Intel (Tony Luck)

   The practical usage of this is being able to tell how much energy or
   how much work can be attributed to a group of tasks tracked under a
   single idenitifier. Prepend this work with proper refactoring of
   resctrl domains handling code.

* tag 'x86_cache_for_v7.0_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
  x86,fs/resctrl: Update documentation for telemetry events
  x86/resctrl: Enable RDT_RESOURCE_PERF_PKG
  fs/resctrl: Move RMID initialization to first mount
  x86,fs/resctrl: Compute number of RMIDs as minimum across resources
  fs/resctrl: Move allocation/free of closid_num_dirty_rmid[]
  x86/resctrl: Handle number of RMIDs supported by RDT_RESOURCE_PERF_PKG
  x86/resctrl: Add energy/perf choices to rdt boot option
  x86,fs/resctrl: Handle domain creation/deletion for RDT_RESOURCE_PERF_PKG
  fs/resctrl: Refactor rmdir_mondata_subdir_allrdtgrp()
  fs/resctrl: Refactor mkdir_mondata_subdir()
  x86/resctrl: Read telemetry events
  x86/resctrl: Find and enable usable telemetry events
  x86,fs/resctrl: Add architectural event pointer
  x86,fs/resctrl: Fill in details of events for performance and energy GUIDs
  x86/resctrl: Discover hardware telemetry events
  fs/resctrl: Emphasize that L3 monitoring resource is required for summing domains
  x86,fs/resctrl: Add and initialize a resource for package scope monitoring
  x86,fs/resctrl: Add an architectural hook called for first mount
  x86,fs/resctrl: Support binary fixed point event counters
  x86,fs/resctrl: Handle events that can be read from any CPU
  ...

14 files changed, 1295 insertions, 399 deletions

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 37674ba5ce66..041fcc8834ee 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -6354,9 +6354,14 @@ Kernel parameters
 	rdt=		[HW,X86,RDT]
 			Turn on/off individual RDT features. List is:
 			cmt, mbmtotal, mbmlocal, l3cat, l3cdp, l2cat, l2cdp,
-			mba, smba, bmec, abmc, sdciae.
+			mba, smba, bmec, abmc, sdciae, energy[:guid],
+			perf[:guid].
 			E.g. to turn on cmt and turn off mba use:
 				rdt=cmt,!mba
+			To turn off all energy telemetry monitoring and ensure that
+			perf telemetry monitoring associated with guid 0x12345
+			is enabled use:
+				rdt=!energy,perf:0x12345
 
 	reboot=		[KNL]
 			Format (x86 or x86_64):
diff --git a/Documentation/filesystems/resctrl.rst b/Documentation/filesystems/resctrl.rst
index 5b27321f2313..ba609f8d4de5 100644
--- a/Documentation/filesystems/resctrl.rst
+++ b/Documentation/filesystems/resctrl.rst
@@ -252,13 +252,12 @@ with respect to allocation:
 			bandwidth percentages are directly applied to
 			the threads running on the core
 
-If RDT monitoring is available there will be an "L3_MON" directory
+If L3 monitoring is available there will be an "L3_MON" directory
 with the following files:
 
 "num_rmids":
-		The number of RMIDs available. This is the
-		upper bound for how many "CTRL_MON" + "MON"
-		groups can be created.
+		The number of RMIDs supported by hardware for
+		L3 monitoring events.
 
 "mon_features":
 		Lists the monitoring events if
@@ -484,6 +483,24 @@ with the following files:
 		bytes) at which a previously used LLC_occupancy
 		counter can be considered for reuse.
 
+If telemetry monitoring is available there will be a "PERF_PKG_MON" directory
+with the following files:
+
+"num_rmids":
+		The number of RMIDs for telemetry monitoring events.
+
+		On Intel resctrl will not enable telemetry events if the number of
+		RMIDs that can be tracked concurrently is lower than the total number
+		of RMIDs supported. Telemetry events can be force-enabled with the
+		"rdt=" kernel parameter, but this may reduce the number of
+		monitoring groups that can be created.
+
+"mon_features":
+		Lists the telemetry monitoring events that are enabled on this system.
+
+The upper bound for how many "CTRL_MON" + "MON" can be created
+is the smaller of the L3_MON and PERF_PKG_MON "num_rmids" values.
+
 Finally, in the top level of the "info" directory there is a file
 named "last_cmd_status". This is reset with every "command" issued
 via the file system (making new directories or writing to any of the
@@ -589,15 +606,40 @@ When control is enabled all CTRL_MON groups will also contain:
 When monitoring is enabled all MON groups will also contain:
 
 "mon_data":
-	This contains a set of files organized by L3 domain and by
-	RDT event. E.g. on a system with two L3 domains there will
-	be subdirectories "mon_L3_00" and "mon_L3_01".	Each of these
-	directories have one file per event (e.g. "llc_occupancy",
-	"mbm_total_bytes", and "mbm_local_bytes"). In a MON group these
-	files provide a read out of the current value of the event for
-	all tasks in the group. In CTRL_MON groups these files provide
-	the sum for all tasks in the CTRL_MON group and all tasks in
+	This contains directories for each monitor domain.
+
+	If L3 monitoring is enabled, there will be a "mon_L3_XX" directory for
+	each instance of an L3 cache. Each directory contains files for the enabled
+	L3 events (e.g. "llc_occupancy", "mbm_total_bytes", and "mbm_local_bytes").
+
+	If telemetry monitoring is enabled, there will be a "mon_PERF_PKG_YY"
+	directory for each physical processor package. Each directory contains
+	files for the enabled telemetry events (e.g. "core_energy". "activity",
+	"uops_retired", etc.)
+
+	The info/`*`/mon_features files provide the full list of enabled
+	event/file names.
+
+	"core energy" reports a floating point number for the energy (in Joules)
+	consumed by cores (registers, arithmetic units, TLB and L1/L2 caches)
+	during execution of instructions summed across all logical CPUs on a
+	package for the current monitoring group.
+
+	"activity" also reports a floating point value (in Farads).  This provides
+	an estimate of work done independent of the frequency that the CPUs used
+	for execution.
+
+	Note that "core energy" and "activity" only measure energy/activity in the
+	"core" of the CPU (arithmetic units, TLB, L1 and L2 caches, etc.). They
+	do not include L3 cache, memory, I/O devices etc.
+
+	All other events report decimal integer values.
+
+	In a MON group these files provide a read out of the current value of
+	the event for all tasks in the group. In CTRL_MON groups these files
+	provide the sum for all tasks in the CTRL_MON group and all tasks in
 	MON groups. Please see example section for more details on usage.
+
 	On systems with Sub-NUMA Cluster (SNC) enabled there are extra
 	directories for each node (located within the "mon_L3_XX" directory
 	for the L3 cache they occupy). These are named "mon_sub_L3_YY"
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 731d9c2fdeb6..ae3a41f5e4de 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -541,6 +541,19 @@ config X86_CPU_RESCTRL
 
 	  Say N if unsure.
 
+config X86_CPU_RESCTRL_INTEL_AET
+	bool "Intel Application Energy Telemetry"
+	depends on X86_64 && X86_CPU_RESCTRL && CPU_SUP_INTEL && INTEL_PMT_TELEMETRY=y && INTEL_TPMI=y
+	help
+	  Enable per-RMID telemetry events in resctrl.
+
+	  Intel feature that collects per-RMID execution data
+	  about energy consumption, measure of frequency independent
+	  activity and other performance metrics. Data is aggregated
+	  per package.
+
+	  Say N if unsure.
+
 config X86_FRED
 	bool "Flexible Return and Event Delivery"
 	depends on X86_64
diff --git a/arch/x86/kernel/cpu/resctrl/Makefile b/arch/x86/kernel/cpu/resctrl/Makefile
index d8a04b195da2..273ddfa30836 100644
--- a/arch/x86/kernel/cpu/resctrl/Makefile
+++ b/arch/x86/kernel/cpu/resctrl/Makefile
@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_X86_CPU_RESCTRL)		+= core.o rdtgroup.o monitor.o
 obj-$(CONFIG_X86_CPU_RESCTRL)		+= ctrlmondata.o
+obj-$(CONFIG_X86_CPU_RESCTRL_INTEL_AET)	+= intel_aet.o
 obj-$(CONFIG_RESCTRL_FS_PSEUDO_LOCK)	+= pseudo_lock.o
 
 # To allow define_trace.h's recursive include:
diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index 6ebff44a3f75..7667cf7c4e94 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -100,14 +100,33 @@ struct rdt_hw_resource rdt_resources_all[RDT_NUM_RESOURCES] = {
 			.schema_fmt		= RESCTRL_SCHEMA_RANGE,
 		},
 	},
+	[RDT_RESOURCE_PERF_PKG] =
+	{
+		.r_resctrl = {
+			.name			= "PERF_PKG",
+			.mon_scope		= RESCTRL_PACKAGE,
+			.mon_domains		= mon_domain_init(RDT_RESOURCE_PERF_PKG),
+		},
+	},
 };
 
+/**
+ * resctrl_arch_system_num_rmid_idx - Compute number of supported RMIDs
+ *				      (minimum across all mon_capable resource)
+ *
+ * Return: Number of supported RMIDs at time of call. Note that mount time
+ * enumeration of resources may reduce the number.
+ */
 u32 resctrl_arch_system_num_rmid_idx(void)
 {
-	struct rdt_resource *r = &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl;
+	u32 num_rmids = U32_MAX;
+	struct rdt_resource *r;
+
+	for_each_mon_capable_rdt_resource(r)
+		num_rmids = min(num_rmids, r->mon.num_rmid);
 
 	/* RMID are independent numbers for x86. num_rmid_idx == num_rmid */
-	return r->mon.num_rmid;
+	return num_rmids == U32_MAX ? 0 : num_rmids;
 }
 
 struct rdt_resource *resctrl_arch_get_resource(enum resctrl_res_level l)
@@ -368,7 +387,7 @@ static void ctrl_domain_free(struct rdt_hw_ctrl_domain *hw_dom)
 	kfree(hw_dom);
 }
 
-static void mon_domain_free(struct rdt_hw_mon_domain *hw_dom)
+static void l3_mon_domain_free(struct rdt_hw_l3_mon_domain *hw_dom)
 {
 	int idx;
 
@@ -401,11 +420,13 @@ static int domain_setup_ctrlval(struct rdt_resource *r, struct rdt_ctrl_domain *
 }
 
 /**
- * arch_domain_mbm_alloc() - Allocate arch private storage for the MBM counters
+ * l3_mon_domain_mbm_alloc() - Allocate arch private storage for the MBM counters
  * @num_rmid:	The size of the MBM counter array
  * @hw_dom:	The domain that owns the allocated arrays
+ *
+ * Return:	0 for success, or -ENOMEM.
  */
-static int arch_domain_mbm_alloc(u32 num_rmid, struct rdt_hw_mon_domain *hw_dom)
+static int l3_mon_domain_mbm_alloc(u32 num_rmid, struct rdt_hw_l3_mon_domain *hw_dom)
 {
 	size_t tsize = sizeof(*hw_dom->arch_mbm_states[0]);
 	enum resctrl_event_id eventid;
@@ -438,6 +459,8 @@ static int get_domain_id_from_scope(int cpu, enum resctrl_scope scope)
 		return get_cpu_cacheinfo_id(cpu, scope);
 	case RESCTRL_L3_NODE:
 		return cpu_to_node(cpu);
+	case RESCTRL_PACKAGE:
+		return topology_physical_package_id(cpu);
 	default:
 		break;
 	}
@@ -464,7 +487,7 @@ static void domain_add_cpu_ctrl(int cpu, struct rdt_resource *r)
 
 	hdr = resctrl_find_domain(&r->ctrl_domains, id, &add_pos);
 	if (hdr) {
-		if (WARN_ON_ONCE(hdr->type != RESCTRL_CTRL_DOMAIN))
+		if (!domain_header_is_valid(hdr, RESCTRL_CTRL_DOMAIN, r->rid))
 			return;
 		d = container_of(hdr, struct rdt_ctrl_domain, hdr);
 
@@ -481,6 +504,7 @@ static void domain_add_cpu_ctrl(int cpu, struct rdt_resource *r)
 	d = &hw_dom->d_resctrl;
 	d->hdr.id = id;
 	d->hdr.type = RESCTRL_CTRL_DOMAIN;
+	d->hdr.rid = r->rid;
 	cpumask_set_cpu(cpu, &d->hdr.cpu_mask);
 
 	rdt_domain_reconfigure_cdp(r);
@@ -500,37 +524,13 @@ static void domain_add_cpu_ctrl(int cpu, struct rdt_resource *r)
 	}
 }
 
-static void domain_add_cpu_mon(int cpu, struct rdt_resource *r)
+static void l3_mon_domain_setup(int cpu, int id, struct rdt_resource *r, struct list_head *add_pos)
 {
-	int id = get_domain_id_from_scope(cpu, r->mon_scope);
-	struct list_head *add_pos = NULL;
-	struct rdt_hw_mon_domain *hw_dom;
-	struct rdt_domain_hdr *hdr;
-	struct rdt_mon_domain *d;
+	struct rdt_hw_l3_mon_domain *hw_dom;
+	struct rdt_l3_mon_domain *d;
 	struct cacheinfo *ci;
 	int err;
 
-	lockdep_assert_held(&domain_list_lock);
-
-	if (id < 0) {
-		pr_warn_once("Can't find monitor domain id for CPU:%d scope:%d for resource %s\n",
-			     cpu, r->mon_scope, r->name);
-		return;
-	}
-
-	hdr = resctrl_find_domain(&r->mon_domains, id, &add_pos);
-	if (hdr) {
-		if (WARN_ON_ONCE(hdr->type != RESCTRL_MON_DOMAIN))
-			return;
-		d = container_of(hdr, struct rdt_mon_domain, hdr);
-
-		cpumask_set_cpu(cpu, &d->hdr.cpu_mask);
-		/* Update the mbm_assign_mode state for the CPU if supported */
-		if (r->mon.mbm_cntr_assignable)
-			resctrl_arch_mbm_cntr_assign_set_one(r);
-		return;
-	}
-
 	hw_dom = kzalloc_node(sizeof(*hw_dom), GFP_KERNEL, cpu_to_node(cpu));
 	if (!hw_dom)
 		return;
@@ -538,33 +538,66 @@ static void domain_add_cpu_mon(int cpu, struct rdt_resource *r)
 	d = &hw_dom->d_resctrl;
 	d->hdr.id = id;
 	d->hdr.type = RESCTRL_MON_DOMAIN;
+	d->hdr.rid = RDT_RESOURCE_L3;
 	ci = get_cpu_cacheinfo_level(cpu, RESCTRL_L3_CACHE);
 	if (!ci) {
 		pr_warn_once("Can't find L3 cache for CPU:%d resource %s\n", cpu, r->name);
-		mon_domain_free(hw_dom);
+		l3_mon_domain_free(hw_dom);
 		return;
 	}
 	d->ci_id = ci->id;
 	cpumask_set_cpu(cpu, &d->hdr.cpu_mask);
 
-	/* Update the mbm_assign_mode state for the CPU if supported */
-	if (r->mon.mbm_cntr_assignable)
-		resctrl_arch_mbm_cntr_assign_set_one(r);
-
 	arch_mon_domain_online(r, d);
 
-	if (arch_domain_mbm_alloc(r->mon.num_rmid, hw_dom)) {
-		mon_domain_free(hw_dom);
+	if (l3_mon_domain_mbm_alloc(r->mon.num_rmid, hw_dom)) {
+		l3_mon_domain_free(hw_dom);
 		return;
 	}
 
 	list_add_tail_rcu(&d->hdr.list, add_pos);
 
-	err = resctrl_online_mon_domain(r, d);
+	err = resctrl_online_mon_domain(r, &d->hdr);
 	if (err) {
 		list_del_rcu(&d->hdr.list);
 		synchronize_rcu();
-		mon_domain_free(hw_dom);
+		l3_mon_domain_free(hw_dom);
+	}
+}
+
+static void domain_add_cpu_mon(int cpu, struct rdt_resource *r)
+{
+	int id = get_domain_id_from_scope(cpu, r->mon_scope);
+	struct list_head *add_pos = NULL;
+	struct rdt_domain_hdr *hdr;
+
+	lockdep_assert_held(&domain_list_lock);
+
+	if (id < 0) {
+		pr_warn_once("Can't find monitor domain id for CPU:%d scope:%d for resource %s\n",
+			     cpu, r->mon_scope, r->name);
+		return;
+	}
+
+	hdr = resctrl_find_domain(&r->mon_domains, id, &add_pos);
+	if (hdr)
+		cpumask_set_cpu(cpu, &hdr->cpu_mask);
+
+	switch (r->rid) {
+	case RDT_RESOURCE_L3:
+		/* Update the mbm_assign_mode state for the CPU if supported */
+		if (r->mon.mbm_cntr_assignable)
+			resctrl_arch_mbm_cntr_assign_set_one(r);
+		if (!hdr)
+			l3_mon_domain_setup(cpu, id, r, add_pos);
+		break;
+	case RDT_RESOURCE_PERF_PKG:
+		if (!hdr)
+			intel_aet_mon_domain_setup(cpu, id, r, add_pos);
+		break;
+	default:
+		pr_warn_once("Unknown resource rid=%d\n", r->rid);
+		break;
 	}
 }
 
@@ -598,36 +631,33 @@ static void domain_remove_cpu_ctrl(int cpu, struct rdt_resource *r)
 		return;
 	}
 
-	if (WARN_ON_ONCE(hdr->type != RESCTRL_CTRL_DOMAIN))
+	cpumask_clear_cpu(cpu, &hdr->cpu_mask);
+	if (!cpumask_empty(&hdr->cpu_mask))
+		return;
+
+	if (!domain_header_is_valid(hdr, RESCTRL_CTRL_DOMAIN, r->rid))
 		return;
 
 	d = container_of(hdr, struct rdt_ctrl_domain, hdr);
 	hw_dom = resctrl_to_arch_ctrl_dom(d);
 
-	cpumask_clear_cpu(cpu, &d->hdr.cpu_mask);
-	if (cpumask_empty(&d->hdr.cpu_mask)) {
-		resctrl_offline_ctrl_domain(r, d);
-		list_del_rcu(&d->hdr.list);
-		synchronize_rcu();
-
-		/*
-		 * rdt_ctrl_domain "d" is going to be freed below, so clear
-		 * its pointer from pseudo_lock_region struct.
-		 */
-		if (d->plr)
-			d->plr->d = NULL;
-		ctrl_domain_free(hw_dom);
+	resctrl_offline_ctrl_domain(r, d);
+	list_del_rcu(&hdr->list);
+	synchronize_rcu();
 
-		return;
-	}
+	/*
+	 * rdt_ctrl_domain "d" is going to be freed below, so clear
+	 * its pointer from pseudo_lock_region struct.
+	 */
+	if (d->plr)
+		d->plr->d = NULL;
+	ctrl_domain_free(hw_dom);
 }
 
 static void domain_remove_cpu_mon(int cpu, struct rdt_resource *r)
 {
 	int id = get_domain_id_from_scope(cpu, r->mon_scope);
-	struct rdt_hw_mon_domain *hw_dom;
 	struct rdt_domain_hdr *hdr;
-	struct rdt_mon_domain *d;
 
 	lockdep_assert_held(&domain_list_lock);
 
@@ -644,20 +674,42 @@ static void domain_remove_cpu_mon(int cpu, struct rdt_resource *r)
 		return;
 	}
 
-	if (WARN_ON_ONCE(hdr->type != RESCTRL_MON_DOMAIN))
+	cpumask_clear_cpu(cpu, &hdr->cpu_mask);
+	if (!cpumask_empty(&hdr->cpu_mask))
 		return;
 
-	d = container_of(hdr, struct rdt_mon_domain, hdr);
-	hw_dom = resctrl_to_arch_mon_dom(d);
+	switch (r->rid) {
+	case RDT_RESOURCE_L3: {
+		struct rdt_hw_l3_mon_domain *hw_dom;
+		struct rdt_l3_mon_domain *d;
 
-	cpumask_clear_cpu(cpu, &d->hdr.cpu_mask);
-	if (cpumask_empty(&d->hdr.cpu_mask)) {
-		resctrl_offline_mon_domain(r, d);
-		list_del_rcu(&d->hdr.list);
+		if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3))
+			return;
+
+		d = container_of(hdr, struct rdt_l3_mon_domain, hdr);
+		hw_dom = resctrl_to_arch_mon_dom(d);
+		resctrl_offline_mon_domain(r, hdr);
+		list_del_rcu(&hdr->list);
 		synchronize_rcu();
-		mon_domain_free(hw_dom);
+		l3_mon_domain_free(hw_dom);
+		break;
+	}
+	case RDT_RESOURCE_PERF_PKG: {
+		struct rdt_perf_pkg_mon_domain *pkgd;
 
-		return;
+		if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_PERF_PKG))
+			return;
+
+		pkgd = container_of(hdr, struct rdt_perf_pkg_mon_domain, hdr);
+		resctrl_offline_mon_domain(r, hdr);
+		list_del_rcu(&hdr->list);
+		synchronize_rcu();
+		kfree(pkgd);
+		break;
+	}
+	default:
+		pr_warn_once("Unknown resource rid=%d\n", r->rid);
+		break;
 	}
 }
 
@@ -712,6 +764,28 @@ static int resctrl_arch_offline_cpu(unsigned int cpu)
 	return 0;
 }
 
+void resctrl_arch_pre_mount(void)
+{
+	struct rdt_resource *r = &rdt_resources_all[RDT_RESOURCE_PERF_PKG].r_resctrl;
+	int cpu;
+
+	if (!intel_aet_get_events())
+		return;
+
+	/*
+	 * Late discovery of telemetry events means the domains for the
+	 * resource were not built. Do that now.
+	 */
+	cpus_read_lock();
+	mutex_lock(&domain_list_lock);
+	r->mon_capable = true;
+	rdt_mon_capable = true;
+	for_each_online_cpu(cpu)
+		domain_add_cpu_mon(cpu, r);
+	mutex_unlock(&domain_list_lock);
+	cpus_read_unlock();
+}
+
 enum {
 	RDT_FLAG_CMT,
 	RDT_FLAG_MBM_TOTAL,
@@ -767,6 +841,8 @@ static int __init set_rdt_options(char *str)
 		force_off = *tok == '!';
 		if (force_off)
 			tok++;
+		if (intel_handle_aet_option(force_off, tok))
+			continue;
 		for (o = rdt_options; o < &rdt_options[NUM_RDT_OPTIONS]; o++) {
 			if (strcmp(tok, o->name) == 0) {
 				if (force_off)
@@ -889,15 +965,15 @@ static __init bool get_rdt_mon_resources(void)
 	bool ret = false;
 
 	if (rdt_cpu_has(X86_FEATURE_CQM_OCCUP_LLC)) {
-		resctrl_enable_mon_event(QOS_L3_OCCUP_EVENT_ID);
+		resctrl_enable_mon_event(QOS_L3_OCCUP_EVENT_ID, false, 0, NULL);
 		ret = true;
 	}
 	if (rdt_cpu_has(X86_FEATURE_CQM_MBM_TOTAL)) {
-		resctrl_enable_mon_event(QOS_L3_MBM_TOTAL_EVENT_ID);
+		resctrl_enable_mon_event(QOS_L3_MBM_TOTAL_EVENT_ID, false, 0, NULL);
 		ret = true;
 	}
 	if (rdt_cpu_has(X86_FEATURE_CQM_MBM_LOCAL)) {
-		resctrl_enable_mon_event(QOS_L3_MBM_LOCAL_EVENT_ID);
+		resctrl_enable_mon_event(QOS_L3_MBM_LOCAL_EVENT_ID, false, 0, NULL);
 		ret = true;
 	}
 	if (rdt_cpu_has(X86_FEATURE_ABMC))
@@ -906,7 +982,7 @@ static __init bool get_rdt_mon_resources(void)
 	if (!ret)
 		return false;
 
-	return !rdt_get_mon_l3_config(r);
+	return !rdt_get_l3_mon_config(r);
 }
 
 static __init void __check_quirks_intel(void)
@@ -1084,6 +1160,8 @@ late_initcall(resctrl_arch_late_init);
 
 static void __exit resctrl_arch_exit(void)
 {
+	intel_aet_exit();
+
 	cpuhp_remove_state(rdt_online);
 
 	resctrl_exit();
diff --git a/arch/x86/kernel/cpu/resctrl/intel_aet.c b/arch/x86/kernel/cpu/resctrl/intel_aet.c
new file mode 100644
index 000000000000..89b8b619d5d5
--- /dev/null
+++ b/arch/x86/kernel/cpu/resctrl/intel_aet.c
@@ -0,0 +1,409 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Resource Director Technology(RDT)
+ * - Intel Application Energy Telemetry
+ *
+ * Copyright (C) 2025 Intel Corporation
+ *
+ * Author:
+ *    Tony Luck <tony.luck@intel.com>
+ */
+
+#define pr_fmt(fmt)   "resctrl: " fmt
+
+#include <linux/bits.h>
+#include <linux/compiler_types.h>
+#include <linux/container_of.h>
+#include <linux/cpumask.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/gfp_types.h>
+#include <linux/init.h>
+#include <linux/intel_pmt_features.h>
+#include <linux/intel_vsec.h>
+#include <linux/io.h>
+#include <linux/minmax.h>
+#include <linux/printk.h>
+#include <linux/rculist.h>
+#include <linux/rcupdate.h>
+#include <linux/resctrl.h>
+#include <linux/resctrl_types.h>
+#include <linux/slab.h>
+#include <linux/stddef.h>
+#include <linux/topology.h>
+#include <linux/types.h>
+
+#include "internal.h"
+
+/**
+ * struct pmt_event - Telemetry event.
+ * @id:		Resctrl event id.
+ * @idx:	Counter index within each per-RMID block of counters.
+ * @bin_bits:	Zero for integer valued events, else number bits in fraction
+ *		part of fixed-point.
+ */
+struct pmt_event {
+	enum resctrl_event_id	id;
+	unsigned int		idx;
+	unsigned int		bin_bits;
+};
+
+#define EVT(_id, _idx, _bits) { .id = _id, .idx = _idx, .bin_bits = _bits }
+
+/**
+ * struct event_group - Events with the same feature type ("energy" or "perf") and GUID.
+ * @pfname:		PMT feature name ("energy" or "perf") of this event group.
+ *			Used by boot rdt= option.
+ * @pfg:		Points to the aggregated telemetry space information
+ *			returned by the intel_pmt_get_regions_by_feature()
+ *			call to the INTEL_PMT_TELEMETRY driver that contains
+ *			data for all telemetry regions of type @pfname.
+ *			Valid if the system supports the event group,
+ *			NULL otherwise.
+ * @force_off:		True when "rdt" command line or architecture code disables
+ *			this event group due to insufficient RMIDs.
+ * @force_on:		True when "rdt" command line overrides disable of this
+ *			event group.
+ * @guid:		Unique number per XML description file.
+ * @num_rmid:		Number of RMIDs supported by this group. May be
+ *			adjusted downwards if enumeration from
+ *			intel_pmt_get_regions_by_feature() indicates fewer
+ *			RMIDs can be tracked simultaneously.
+ * @mmio_size:		Number of bytes of MMIO registers for this group.
+ * @num_events:		Number of events in this group.
+ * @evts:		Array of event descriptors.
+ */
+struct event_group {
+	/* Data fields for additional structures to manage this group. */
+	const char			*pfname;
+	struct pmt_feature_group	*pfg;
+	bool				force_off, force_on;
+
+	/* Remaining fields initialized from XML file. */
+	u32				guid;
+	u32				num_rmid;
+	size_t				mmio_size;
+	unsigned int			num_events;
+	struct pmt_event		evts[] __counted_by(num_events);
+};
+
+#define XML_MMIO_SIZE(num_rmids, num_events, num_extra_status) \
+		      (((num_rmids) * (num_events) + (num_extra_status)) * sizeof(u64))
+
+/*
+ * Link: https://github.com/intel/Intel-PMT/blob/main/xml/CWF/OOBMSM/RMID-ENERGY/cwf_aggregator.xml
+ */
+static struct event_group energy_0x26696143 = {
+	.pfname		= "energy",
+	.guid		= 0x26696143,
+	.num_rmid	= 576,
+	.mmio_size	= XML_MMIO_SIZE(576, 2, 3),
+	.num_events	= 2,
+	.evts		= {
+		EVT(PMT_EVENT_ENERGY, 0, 18),
+		EVT(PMT_EVENT_ACTIVITY, 1, 18),
+	}
+};
+
+/*
+ * Link: https://github.com/intel/Intel-PMT/blob/main/xml/CWF/OOBMSM/RMID-PERF/cwf_aggregator.xml
+ */
+static struct event_group perf_0x26557651 = {
+	.pfname		= "perf",
+	.guid		= 0x26557651,
+	.num_rmid	= 576,
+	.mmio_size	= XML_MMIO_SIZE(576, 7, 3),
+	.num_events	= 7,
+	.evts		= {
+		EVT(PMT_EVENT_STALLS_LLC_HIT, 0, 0),
+		EVT(PMT_EVENT_C1_RES, 1, 0),
+		EVT(PMT_EVENT_UNHALTED_CORE_CYCLES, 2, 0),
+		EVT(PMT_EVENT_STALLS_LLC_MISS, 3, 0),
+		EVT(PMT_EVENT_AUTO_C6_RES, 4, 0),
+		EVT(PMT_EVENT_UNHALTED_REF_CYCLES, 5, 0),
+		EVT(PMT_EVENT_UOPS_RETIRED, 6, 0),
+	}
+};
+
+static struct event_group *known_event_groups[] = {
+	&energy_0x26696143,
+	&perf_0x26557651,
+};
+
+#define for_each_event_group(_peg)						\
+	for (_peg = known_event_groups;						\
+	     _peg < &known_event_groups[ARRAY_SIZE(known_event_groups)];	\
+	     _peg++)
+
+bool intel_handle_aet_option(bool force_off, char *tok)
+{
+	struct event_group **peg;
+	bool ret = false;
+	u32 guid = 0;
+	char *name;
+
+	if (!tok)
+		return false;
+
+	name = strsep(&tok, ":");
+	if (tok && kstrtou32(tok, 16, &guid))
+		return false;
+
+	for_each_event_group(peg) {
+		if (strcmp(name, (*peg)->pfname))
+			continue;
+		if (guid && (*peg)->guid != guid)
+			continue;
+		if (force_off)
+			(*peg)->force_off = true;
+		else
+			(*peg)->force_on = true;
+		ret = true;
+	}
+
+	return ret;
+}
+
+static bool skip_telem_region(struct telemetry_region *tr, struct event_group *e)
+{
+	if (tr->guid != e->guid)
+		return true;
+	if (tr->plat_info.package_id >= topology_max_packages()) {
+		pr_warn("Bad package %u in guid 0x%x\n", tr->plat_info.package_id,
+			tr->guid);
+		return true;
+	}
+	if (tr->size != e->mmio_size) {
+		pr_warn("MMIO space wrong size (%zu bytes) for guid 0x%x. Expected %zu bytes.\n",
+			tr->size, e->guid, e->mmio_size);
+		return true;
+	}
+
+	return false;
+}
+
+static bool group_has_usable_regions(struct event_group *e, struct pmt_feature_group *p)
+{
+	bool usable_regions = false;
+
+	for (int i = 0; i < p->count; i++) {
+		if (skip_telem_region(&p->regions[i], e)) {
+			/*
+			 * Clear the address field of regions that did not pass the checks in
+			 * skip_telem_region() so they will not be used by intel_aet_read_event().
+			 * This is safe to do because intel_pmt_get_regions_by_feature() allocates
+			 * a new pmt_feature_group structure to return to each caller and only makes
+			 * use of the pmt_feature_group::kref field when intel_pmt_put_feature_group()
+			 * returns the structure.
+			 */
+			p->regions[i].addr = NULL;
+
+			continue;
+		}
+		usable_regions = true;
+	}
+
+	return usable_regions;
+}
+
+static bool all_regions_have_sufficient_rmid(struct event_group *e, struct pmt_feature_group *p)
+{
+	struct telemetry_region *tr;
+
+	for (int i = 0; i < p->count; i++) {
+		if (!p->regions[i].addr)
+			continue;
+		tr = &p->regions[i];
+		if (tr->num_rmids < e->num_rmid) {
+			e->force_off = true;
+			return false;
+		}
+	}
+
+	return true;
+}
+
+static bool enable_events(struct event_group *e, struct pmt_feature_group *p)
+{
+	struct rdt_resource *r = &rdt_resources_all[RDT_RESOURCE_PERF_PKG].r_resctrl;
+	int skipped_events = 0;
+
+	if (e->force_off)
+		return false;
+
+	if (!group_has_usable_regions(e, p))
+		return false;
+
+	/*
+	 * Only enable event group with insufficient RMIDs if the user requested
+	 * it from the kernel command line.
+	 */
+	if (!all_regions_have_sufficient_rmid(e, p) && !e->force_on) {
+		pr_info("%s %s:0x%x monitoring not enabled due to insufficient RMIDs\n",
+			r->name, e->pfname, e->guid);
+		return false;
+	}
+
+	for (int i = 0; i < p->count; i++) {
+		if (!p->regions[i].addr)
+			continue;
+		/*
+		 * e->num_rmid only adjusted lower if user (via rdt= kernel
+		 * parameter) forces an event group with insufficient RMID
+		 * to be enabled.
+		 */
+		e->num_rmid = min(e->num_rmid, p->regions[i].num_rmids);
+	}
+
+	for (int j = 0; j < e->num_events; j++) {
+		if (!resctrl_enable_mon_event(e->evts[j].id, true,
+					      e->evts[j].bin_bits, &e->evts[j]))
+			skipped_events++;
+	}
+	if (e->num_events == skipped_events) {
+		pr_info("No events enabled in %s %s:0x%x\n", r->name, e->pfname, e->guid);
+		return false;
+	}
+
+	if (r->mon.num_rmid)
+		r->mon.num_rmid = min(r->mon.num_rmid, e->num_rmid);
+	else
+		r->mon.num_rmid = e->num_rmid;
+
+	if (skipped_events)
+		pr_info("%s %s:0x%x monitoring detected (skipped %d events)\n", r->name,
+			e->pfname, e->guid, skipped_events);
+	else
+		pr_info("%s %s:0x%x monitoring detected\n", r->name, e->pfname, e->guid);
+
+	return true;
+}
+
+static enum pmt_feature_id lookup_pfid(const char *pfname)
+{
+	if (!strcmp(pfname, "energy"))
+		return FEATURE_PER_RMID_ENERGY_TELEM;
+	else if (!strcmp(pfname, "perf"))
+		return FEATURE_PER_RMID_PERF_TELEM;
+
+	pr_warn("Unknown PMT feature name '%s'\n", pfname);
+
+	return FEATURE_INVALID;
+}
+
+/*
+ * Request a copy of struct pmt_feature_group for each event group. If there is
+ * one, the returned structure has an array of telemetry_region structures,
+ * each element of the array describes one telemetry aggregator. The
+ * telemetry aggregators may have different GUIDs so obtain duplicate struct
+ * pmt_feature_group for event groups with same feature type but different
+ * GUID. Post-processing ensures an event group can only use the telemetry
+ * aggregators that match its GUID. An event group keeps a pointer to its
+ * struct pmt_feature_group to indicate that its events are successfully
+ * enabled.
+ */
+bool intel_aet_get_events(void)
+{
+	struct pmt_feature_group *p;
+	enum pmt_feature_id pfid;
+	struct event_group **peg;
+	bool ret = false;
+
+	for_each_event_group(peg) {
+		pfid = lookup_pfid((*peg)->pfname);
+		p = intel_pmt_get_regions_by_feature(pfid);
+		if (IS_ERR_OR_NULL(p))
+			continue;
+		if (enable_events(*peg, p)) {
+			(*peg)->pfg = p;
+			ret = true;
+		} else {
+			intel_pmt_put_feature_group(p);
+		}
+	}
+
+	return ret;
+}
+
+void __exit intel_aet_exit(void)
+{
+	struct event_group **peg;
+
+	for_each_event_group(peg) {
+		if ((*peg)->pfg) {
+			intel_pmt_put_feature_group((*peg)->pfg);
+			(*peg)->pfg = NULL;
+		}
+	}
+}
+
+#define DATA_VALID	BIT_ULL(63)
+#define DATA_BITS	GENMASK_ULL(62, 0)
+
+/*
+ * Read counter for an event on a domain (summing all aggregators on the
+ * domain). If an aggregator hasn't received any data for a specific RMID,
+ * the MMIO read indicates that data is not valid.  Return success if at
+ * least one aggregator has valid data.
+ */
+int intel_aet_read_event(int domid, u32 rmid, void *arch_priv, u64 *val)
+{
+	struct pmt_event *pevt = arch_priv;
+	struct event_group *e;
+	bool valid = false;
+	u64 total = 0;
+	u64 evtcount;
+	void *pevt0;
+	u32 idx;
+
+	pevt0 = pevt - pevt->idx;
+	e = container_of(pevt0, struct event_group, evts);
+	idx = rmid * e->num_events;
+	idx += pevt->idx;
+
+	if (idx * sizeof(u64) + sizeof(u64) > e->mmio_size) {
+		pr_warn_once("MMIO index %u out of range\n", idx);
+		return -EIO;
+	}
+
+	for (int i = 0; i < e->pfg->count; i++) {
+		if (!e->pfg->regions[i].addr)
+			continue;
+		if (e->pfg->regions[i].plat_info.package_id != domid)
+			continue;
+		evtcount = readq(e->pfg->regions[i].addr + idx * sizeof(u64));
+		if (!(evtcount & DATA_VALID))
+			continue;
+		total += evtcount & DATA_BITS;
+		valid = true;
+	}
+
+	if (valid)
+		*val = total;
+
+	return valid ? 0 : -EINVAL;
+}
+
+void intel_aet_mon_domain_setup(int cpu, int id, struct rdt_resource *r,
+				struct list_head *add_pos)
+{
+	struct rdt_perf_pkg_mon_domain *d;
+	int err;
+
+	d = kzalloc_node(sizeof(*d), GFP_KERNEL, cpu_to_node(cpu));
+	if (!d)
+		return;
+
+	d->hdr.id = id;
+	d->hdr.type = RESCTRL_MON_DOMAIN;
+	d->hdr.rid = RDT_RESOURCE_PERF_PKG;
+	cpumask_set_cpu(cpu, &d->hdr.cpu_mask);
+	list_add_tail_rcu(&d->hdr.list, add_pos);
+
+	err = resctrl_online_mon_domain(r, &d->hdr);
+	if (err) {
+		list_del_rcu(&d->hdr.list);
+		synchronize_rcu();
+		kfree(d);
+	}
+}
diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h
index 79c18657ede0..e3cfa0c10e92 100644
--- a/arch/x86/kernel/cpu/resctrl/internal.h
+++ b/arch/x86/kernel/cpu/resctrl/internal.h
@@ -66,17 +66,17 @@ struct rdt_hw_ctrl_domain {
 };
 
 /**
- * struct rdt_hw_mon_domain - Arch private attributes of a set of CPUs that share
- *			      a resource for a monitor function
- * @d_resctrl:	Properties exposed to the resctrl file system
+ * struct rdt_hw_l3_mon_domain - Arch private attributes of a set of CPUs sharing
+ *				 RDT_RESOURCE_L3 monitoring
+ * @d_resctrl:		Properties exposed to the resctrl file system
  * @arch_mbm_states:	Per-event pointer to the MBM event's saved state.
  *			An MBM event's state is an array of struct arch_mbm_state
  *			indexed by RMID on x86.
  *
  * Members of this structure are accessed via helpers that provide abstraction.
  */
-struct rdt_hw_mon_domain {
-	struct rdt_mon_domain		d_resctrl;
+struct rdt_hw_l3_mon_domain {
+	struct rdt_l3_mon_domain	d_resctrl;
 	struct arch_mbm_state		*arch_mbm_states[QOS_NUM_L3_MBM_EVENTS];
 };
 
@@ -85,12 +85,20 @@ static inline struct rdt_hw_ctrl_domain *resctrl_to_arch_ctrl_dom(struct rdt_ctr
 	return container_of(r, struct rdt_hw_ctrl_domain, d_resctrl);
 }
 
-static inline struct rdt_hw_mon_domain *resctrl_to_arch_mon_dom(struct rdt_mon_domain *r)
+static inline struct rdt_hw_l3_mon_domain *resctrl_to_arch_mon_dom(struct rdt_l3_mon_domain *r)
 {
-	return container_of(r, struct rdt_hw_mon_domain, d_resctrl);
+	return container_of(r, struct rdt_hw_l3_mon_domain, d_resctrl);
 }
 
 /**
+ * struct rdt_perf_pkg_mon_domain - CPUs sharing an package scoped resctrl monitor resource
+ * @hdr:	common header for different domain types
+ */
+struct rdt_perf_pkg_mon_domain {
+	struct rdt_domain_hdr	hdr;
+};
+
+/**
  * struct msr_param - set a range of MSRs from a domain
  * @res:       The resource to use
  * @dom:       The domain to update
@@ -143,7 +151,7 @@ static inline struct rdt_hw_resource *resctrl_to_arch_res(struct rdt_resource *r
 
 extern struct rdt_hw_resource rdt_resources_all[];
 
-void arch_mon_domain_online(struct rdt_resource *r, struct rdt_mon_domain *d);
+void arch_mon_domain_online(struct rdt_resource *r, struct rdt_l3_mon_domain *d);
 
 /* CPUID.(EAX=10H, ECX=ResID=1).EAX */
 union cpuid_0x10_1_eax {
@@ -216,7 +224,7 @@ union l3_qos_abmc_cfg {
 
 void rdt_ctrl_update(void *arg);
 
-int rdt_get_mon_l3_config(struct rdt_resource *r);
+int rdt_get_l3_mon_config(struct rdt_resource *r);
 
 bool rdt_cpu_has(int flag);
 
@@ -225,4 +233,24 @@ void __init intel_rdt_mbm_apply_quirk(void);
 void rdt_domain_reconfigure_cdp(struct rdt_resource *r);
 void resctrl_arch_mbm_cntr_assign_set_one(struct rdt_resource *r);
 
+#ifdef CONFIG_X86_CPU_RESCTRL_INTEL_AET
+bool intel_aet_get_events(void);
+void __exit intel_aet_exit(void);
+int intel_aet_read_event(int domid, u32 rmid, void *arch_priv, u64 *val);
+void intel_aet_mon_domain_setup(int cpu, int id, struct rdt_resource *r,
+				struct list_head *add_pos);
+bool intel_handle_aet_option(bool force_off, char *tok);
+#else
+static inline bool intel_aet_get_events(void) { return false; }
+static inline void __exit intel_aet_exit(void) { }
+static inline int intel_aet_read_event(int domid, u32 rmid, void *arch_priv, u64 *val)
+{
+	return -EINVAL;
+}
+
+static inline void intel_aet_mon_domain_setup(int cpu, int id, struct rdt_resource *r,
+					      struct list_head *add_pos) { }
+static inline bool intel_handle_aet_option(bool force_off, char *tok) { return false; }
+#endif
+
 #endif /* _ASM_X86_RESCTRL_INTERNAL_H */
diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c
index dffcc8307500..e6a154240b8d 100644
--- a/arch/x86/kernel/cpu/resctrl/monitor.c
+++ b/arch/x86/kernel/cpu/resctrl/monitor.c
@@ -109,7 +109,7 @@ static inline u64 get_corrected_mbm_count(u32 rmid, unsigned long val)
  *
  * In RMID sharing mode there are fewer "logical RMID" values available
  * to accumulate data ("physical RMIDs" are divided evenly between SNC
- * nodes that share an L3 cache). Linux creates an rdt_mon_domain for
+ * nodes that share an L3 cache). Linux creates an rdt_l3_mon_domain for
  * each SNC node.
  *
  * The value loaded into IA32_PQR_ASSOC is the "logical RMID".
@@ -157,7 +157,7 @@ static int __rmid_read_phys(u32 prmid, enum resctrl_event_id eventid, u64 *val)
 	return 0;
 }
 
-static struct arch_mbm_state *get_arch_mbm_state(struct rdt_hw_mon_domain *hw_dom,
+static struct arch_mbm_state *get_arch_mbm_state(struct rdt_hw_l3_mon_domain *hw_dom,
 						 u32 rmid,
 						 enum resctrl_event_id eventid)
 {
@@ -171,11 +171,11 @@ static struct arch_mbm_state *get_arch_mbm_state(struct rdt_hw_mon_domain *hw_do
 	return state ? &state[rmid] : NULL;
 }
 
-void resctrl_arch_reset_rmid(struct rdt_resource *r, struct rdt_mon_domain *d,
+void resctrl_arch_reset_rmid(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 			     u32 unused, u32 rmid,
 			     enum resctrl_event_id eventid)
 {
-	struct rdt_hw_mon_domain *hw_dom = resctrl_to_arch_mon_dom(d);
+	struct rdt_hw_l3_mon_domain *hw_dom = resctrl_to_arch_mon_dom(d);
 	int cpu = cpumask_any(&d->hdr.cpu_mask);
 	struct arch_mbm_state *am;
 	u32 prmid;
@@ -194,9 +194,9 @@ void resctrl_arch_reset_rmid(struct rdt_resource *r, struct rdt_mon_domain *d,
  * Assumes that hardware counters are also reset and thus that there is
  * no need to record initial non-zero counts.
  */
-void resctrl_arch_reset_rmid_all(struct rdt_resource *r, struct rdt_mon_domain *d)
+void resctrl_arch_reset_rmid_all(struct rdt_resource *r, struct rdt_l3_mon_domain *d)
 {
-	struct rdt_hw_mon_domain *hw_dom = resctrl_to_arch_mon_dom(d);
+	struct rdt_hw_l3_mon_domain *hw_dom = resctrl_to_arch_mon_dom(d);
 	enum resctrl_event_id eventid;
 	int idx;
 
@@ -217,10 +217,10 @@ static u64 mbm_overflow_count(u64 prev_msr, u64 cur_msr, unsigned int width)
 	return chunks >> shift;
 }
 
-static u64 get_corrected_val(struct rdt_resource *r, struct rdt_mon_domain *d,
+static u64 get_corrected_val(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 			     u32 rmid, enum resctrl_event_id eventid, u64 msr_val)
 {
-	struct rdt_hw_mon_domain *hw_dom = resctrl_to_arch_mon_dom(d);
+	struct rdt_hw_l3_mon_domain *hw_dom = resctrl_to_arch_mon_dom(d);
 	struct rdt_hw_resource *hw_res = resctrl_to_arch_res(r);
 	struct arch_mbm_state *am;
 	u64 chunks;
@@ -238,19 +238,29 @@ static u64 get_corrected_val(struct rdt_resource *r, struct rdt_mon_domain *d,
 	return chunks * hw_res->mon_scale;
 }
 
-int resctrl_arch_rmid_read(struct rdt_resource *r, struct rdt_mon_domain *d,
+int resctrl_arch_rmid_read(struct rdt_resource *r, struct rdt_domain_hdr *hdr,
 			   u32 unused, u32 rmid, enum resctrl_event_id eventid,
-			   u64 *val, void *ignored)
+			   void *arch_priv, u64 *val, void *ignored)
 {
-	struct rdt_hw_mon_domain *hw_dom = resctrl_to_arch_mon_dom(d);
-	int cpu = cpumask_any(&d->hdr.cpu_mask);
+	struct rdt_hw_l3_mon_domain *hw_dom;
+	struct rdt_l3_mon_domain *d;
 	struct arch_mbm_state *am;
 	u64 msr_val;
 	u32 prmid;
+	int cpu;
 	int ret;
 
 	resctrl_arch_rmid_read_context_check();
 
+	if (r->rid == RDT_RESOURCE_PERF_PKG)
+		return intel_aet_read_event(hdr->id, rmid, arch_priv, val);
+
+	if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3))
+		return -EINVAL;
+
+	d = container_of(hdr, struct rdt_l3_mon_domain, hdr);
+	hw_dom = resctrl_to_arch_mon_dom(d);
+	cpu = cpumask_any(&hdr->cpu_mask);
 	prmid = logical_rmid_to_physical_rmid(cpu, rmid);
 	ret = __rmid_read_phys(prmid, eventid, &msr_val);
 
@@ -302,11 +312,11 @@ static int __cntr_id_read(u32 cntr_id, u64 *val)
 	return 0;
 }
 
-void resctrl_arch_reset_cntr(struct rdt_resource *r, struct rdt_mon_domain *d,
+void resctrl_arch_reset_cntr(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 			     u32 unused, u32 rmid, int cntr_id,
 			     enum resctrl_event_id eventid)
 {
-	struct rdt_hw_mon_domain *hw_dom = resctrl_to_arch_mon_dom(d);
+	struct rdt_hw_l3_mon_domain *hw_dom = resctrl_to_arch_mon_dom(d);
 	struct arch_mbm_state *am;
 
 	am = get_arch_mbm_state(hw_dom, rmid, eventid);
@@ -318,7 +328,7 @@ void resctrl_arch_reset_cntr(struct rdt_resource *r, struct rdt_mon_domain *d,
 	}
 }
 
-int resctrl_arch_cntr_read(struct rdt_resource *r, struct rdt_mon_domain *d,
+int resctrl_arch_cntr_read(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 			   u32 unused, u32 rmid, int cntr_id,
 			   enum resctrl_event_id eventid, u64 *val)
 {
@@ -348,7 +358,7 @@ int resctrl_arch_cntr_read(struct rdt_resource *r, struct rdt_mon_domain *d,
  * must adjust RMID counter numbers based on SNC node. See
  * logical_rmid_to_physical_rmid() for code that does this.
  */
-void arch_mon_domain_online(struct rdt_resource *r, struct rdt_mon_domain *d)
+void arch_mon_domain_online(struct rdt_resource *r, struct rdt_l3_mon_domain *d)
 {
 	if (snc_nodes_per_l3_cache > 1)
 		msr_clear_bit(MSR_RMID_SNC_CONFIG, 0);
@@ -418,7 +428,7 @@ static __init int snc_get_config(void)
 	return ret;
 }
 
-int __init rdt_get_mon_l3_config(struct rdt_resource *r)
+int __init rdt_get_l3_mon_config(struct rdt_resource *r)
 {
 	unsigned int mbm_offset = boot_cpu_data.x86_cache_mbm_width_offset;
 	struct rdt_hw_resource *hw_res = resctrl_to_arch_res(r);
@@ -510,7 +520,7 @@ static void resctrl_abmc_set_one_amd(void *arg)
  */
 static void _resctrl_abmc_enable(struct rdt_resource *r, bool enable)
 {
-	struct rdt_mon_domain *d;
+	struct rdt_l3_mon_domain *d;
 
 	lockdep_assert_cpus_held();
 
@@ -549,11 +559,11 @@ static void resctrl_abmc_config_one_amd(void *info)
 /*
  * Send an IPI to the domain to assign the counter to RMID, event pair.
  */
-void resctrl_arch_config_cntr(struct rdt_resource *r, struct rdt_mon_domain *d,
+void resctrl_arch_config_cntr(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 			      enum resctrl_event_id evtid, u32 rmid, u32 closid,
 			      u32 cntr_id, bool assign)
 {
-	struct rdt_hw_mon_domain *hw_dom = resctrl_to_arch_mon_dom(d);
+	struct rdt_hw_l3_mon_domain *hw_dom = resctrl_to_arch_mon_dom(d);
 	union l3_qos_abmc_cfg abmc_cfg = { 0 };
 	struct arch_mbm_state *am;
 
diff --git a/fs/resctrl/ctrlmondata.c b/fs/resctrl/ctrlmondata.c
index b2d178d3556e..cc4237c57cbe 100644
--- a/fs/resctrl/ctrlmondata.c
+++ b/fs/resctrl/ctrlmondata.c
@@ -17,6 +17,7 @@
 
 #include <linux/cpu.h>
 #include <linux/kernfs.h>
+#include <linux/math.h>
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/tick.h>
@@ -551,8 +552,8 @@ struct rdt_domain_hdr *resctrl_find_domain(struct list_head *h, int id,
 }
 
 void mon_event_read(struct rmid_read *rr, struct rdt_resource *r,
-		    struct rdt_mon_domain *d, struct rdtgroup *rdtgrp,
-		    cpumask_t *cpumask, int evtid, int first)
+		    struct rdt_domain_hdr *hdr, struct rdtgroup *rdtgrp,
+		    cpumask_t *cpumask, struct mon_evt *evt, int first)
 {
 	int cpu;
 
@@ -563,21 +564,26 @@ void mon_event_read(struct rmid_read *rr, struct rdt_resource *r,
 	 * Setup the parameters to pass to mon_event_count() to read the data.
 	 */
 	rr->rgrp = rdtgrp;
-	rr->evtid = evtid;
+	rr->evt = evt;
 	rr->r = r;
-	rr->d = d;
+	rr->hdr = hdr;
 	rr->first = first;
 	if (resctrl_arch_mbm_cntr_assign_enabled(r) &&
-	    resctrl_is_mbm_event(evtid)) {
+	    resctrl_is_mbm_event(evt->evtid)) {
 		rr->is_mbm_cntr = true;
 	} else {
-		rr->arch_mon_ctx = resctrl_arch_mon_ctx_alloc(r, evtid);
+		rr->arch_mon_ctx = resctrl_arch_mon_ctx_alloc(r, evt->evtid);
 		if (IS_ERR(rr->arch_mon_ctx)) {
 			rr->err = -EINVAL;
 			return;
 		}
 	}
 
+	if (evt->any_cpu) {
+		mon_event_count(rr);
+		goto out_ctx_free;
+	}
+
 	cpu = cpumask_any_housekeeping(cpumask, RESCTRL_PICK_ANY_CPU);
 
 	/*
@@ -591,22 +597,93 @@ void mon_event_read(struct rmid_read *rr, struct rdt_resource *r,
 	else
 		smp_call_on_cpu(cpu, smp_mon_event_count, rr, false);
 
+out_ctx_free:
 	if (rr->arch_mon_ctx)
-		resctrl_arch_mon_ctx_free(r, evtid, rr->arch_mon_ctx);
+		resctrl_arch_mon_ctx_free(r, evt->evtid, rr->arch_mon_ctx);
+}
+
+/*
+ * Decimal place precision to use for each number of fixed-point
+ * binary bits computed from ceil(binary_bits * log10(2)) except
+ * binary_bits == 0 which will print "value.0"
+ */
+static const unsigned int decplaces[MAX_BINARY_BITS + 1] = {
+	[0]  =  1,
+	[1]  =  1,
+	[2]  =  1,
+	[3]  =  1,
+	[4]  =  2,
+	[5]  =  2,
+	[6]  =  2,
+	[7]  =  3,
+	[8]  =  3,
+	[9]  =  3,
+	[10] =  4,
+	[11] =  4,
+	[12] =  4,
+	[13] =  4,
+	[14] =  5,
+	[15] =  5,
+	[16] =  5,
+	[17] =  6,
+	[18] =  6,
+	[19] =  6,
+	[20] =  7,
+	[21] =  7,
+	[22] =  7,
+	[23] =  7,
+	[24] =  8,
+	[25] =  8,
+	[26] =  8,
+	[27] =  9
+};
+
+static void print_event_value(struct seq_file *m, unsigned int binary_bits, u64 val)
+{
+	unsigned long long frac = 0;
+
+	if (binary_bits) {
+		/* Mask off the integer part of the fixed-point value. */
+		frac = val & GENMASK_ULL(binary_bits - 1, 0);
+
+		/*
+		 * Multiply by 10^{desired decimal places}. The integer part of
+		 * the fixed point value is now almost what is needed.
+		 */
+		frac *= int_pow(10ull, decplaces[binary_bits]);
+
+		/*
+		 * Round to nearest by adding a value that would be a "1" in the
+		 * binary_bits + 1 place.  Integer part of fixed point value is
+		 * now the needed value.
+		 */
+		frac += 1ull << (binary_bits - 1);
+
+		/*
+		 * Extract the integer part of the value. This is the decimal
+		 * representation of the original fixed-point fractional value.
+		 */
+		frac >>= binary_bits;
+	}
+
+	/*
+	 * "frac" is now in the range [0 .. 10^decplaces).  I.e. string
+	 * representation will fit into chosen number of decimal places.
+	 */
+	seq_printf(m, "%llu.%0*llu\n", val >> binary_bits, decplaces[binary_bits], frac);
 }
 
 int rdtgroup_mondata_show(struct seq_file *m, void *arg)
 {
 	struct kernfs_open_file *of = m->private;
 	enum resctrl_res_level resid;
-	enum resctrl_event_id evtid;
 	struct rdt_domain_hdr *hdr;
 	struct rmid_read rr = {0};
-	struct rdt_mon_domain *d;
 	struct rdtgroup *rdtgrp;
 	int domid, cpu, ret = 0;
 	struct rdt_resource *r;
 	struct cacheinfo *ci;
+	struct mon_evt *evt;
 	struct mon_data *md;
 
 	rdtgrp = rdtgroup_kn_lock_live(of->kn);
@@ -623,10 +700,17 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg)
 
 	resid = md->rid;
 	domid = md->domid;
-	evtid = md->evtid;
+	evt = md->evt;
 	r = resctrl_arch_get_resource(resid);
 
 	if (md->sum) {
+		struct rdt_l3_mon_domain *d;
+
+		if (WARN_ON_ONCE(resid != RDT_RESOURCE_L3)) {
+			ret = -EINVAL;
+			goto out;
+		}
+
 		/*
 		 * This file requires summing across all domains that share
 		 * the L3 cache id that was provided in the "domid" field of the
@@ -641,7 +725,7 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg)
 					continue;
 				rr.ci = ci;
 				mon_event_read(&rr, r, NULL, rdtgrp,
-					       &ci->shared_cpu_map, evtid, false);
+					       &ci->shared_cpu_map, evt, false);
 				goto checkresult;
 			}
 		}
@@ -653,12 +737,11 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg)
 		 * the resource to find the domain with "domid".
 		 */
 		hdr = resctrl_find_domain(&r->mon_domains, domid, NULL);
-		if (!hdr || WARN_ON_ONCE(hdr->type != RESCTRL_MON_DOMAIN)) {
+		if (!hdr) {
 			ret = -ENOENT;
 			goto out;
 		}
-		d = container_of(hdr, struct rdt_mon_domain, hdr);
-		mon_event_read(&rr, r, d, rdtgrp, &d->hdr.cpu_mask, evtid, false);
+		mon_event_read(&rr, r, hdr, rdtgrp, &hdr->cpu_mask, evt, false);
 	}
 
 checkresult:
@@ -673,6 +756,8 @@ checkresult:
 		seq_puts(m, "Unavailable\n");
 	else if (rr.err == -ENOENT)
 		seq_puts(m, "Unassigned\n");
+	else if (evt->is_floating_point)
+		print_event_value(m, evt->binary_bits, rr.val);
 	else
 		seq_printf(m, "%llu\n", rr.val);
 
diff --git a/fs/resctrl/internal.h b/fs/resctrl/internal.h
index bff4a54ae333..1a9b29119f88 100644
--- a/fs/resctrl/internal.h
+++ b/fs/resctrl/internal.h
@@ -61,7 +61,14 @@ static inline struct rdt_fs_context *rdt_fc2context(struct fs_context *fc)
  *			READS_TO_REMOTE_MEM) being tracked by @evtid.
  *			Only valid if @evtid is an MBM event.
  * @configurable:	true if the event is configurable
+ * @any_cpu:		true if the event can be read from any CPU
+ * @is_floating_point:	event values are displayed in floating point format
+ * @binary_bits:	number of fixed-point binary bits from architecture,
+ *			only valid if @is_floating_point is true
  * @enabled:		true if the event is enabled
+ * @arch_priv:		Architecture private data for this event.
+ *			The @arch_priv provided by the architecture via
+ *			resctrl_enable_mon_event().
  */
 struct mon_evt {
 	enum resctrl_event_id	evtid;
@@ -69,7 +76,11 @@ struct mon_evt {
 	char			*name;
 	u32			evt_cfg;
 	bool			configurable;
+	bool			any_cpu;
+	bool			is_floating_point;
+	unsigned int		binary_bits;
 	bool			enabled;
+	void			*arch_priv;
 };
 
 extern struct mon_evt mon_event_all[QOS_NUM_EVENTS];
@@ -77,13 +88,16 @@ extern struct mon_evt mon_event_all[QOS_NUM_EVENTS];
 #define for_each_mon_event(mevt) for (mevt = &mon_event_all[QOS_FIRST_EVENT];	\
 				      mevt < &mon_event_all[QOS_NUM_EVENTS]; mevt++)
 
+/* Limit for mon_evt::binary_bits */
+#define MAX_BINARY_BITS	27
+
 /**
  * struct mon_data - Monitoring details for each event file.
  * @list:            Member of the global @mon_data_kn_priv_list list.
  * @rid:             Resource id associated with the event file.
- * @evtid:           Event id associated with the event file.
- * @sum:             Set when event must be summed across multiple
- *                   domains.
+ * @evt:             Event structure associated with the event file.
+ * @sum:             Set for RDT_RESOURCE_L3 when event must be summed
+ *                   across multiple domains.
  * @domid:           When @sum is zero this is the domain to which
  *                   the event file belongs. When @sum is one this
  *                   is the id of the L3 cache that all domains to be
@@ -95,7 +109,7 @@ extern struct mon_evt mon_event_all[QOS_NUM_EVENTS];
 struct mon_data {
 	struct list_head	list;
 	enum resctrl_res_level	rid;
-	enum resctrl_event_id	evtid;
+	struct mon_evt		*evt;
 	int			domid;
 	bool			sum;
 };
@@ -106,25 +120,27 @@ struct mon_data {
  *	   resource group then its event count is summed with the count from all
  *	   its child resource groups.
  * @r:	   Resource describing the properties of the event being read.
- * @d:	   Domain that the counter should be read from. If NULL then sum all
- *	   domains in @r sharing L3 @ci.id
- * @evtid: Which monitor event to read.
+ * @hdr:   Header of domain that the counter should be read from. If NULL then
+ *	   sum all domains in @r sharing L3 @ci.id
+ * @evt:   Which monitor event to read.
  * @first: Initialize MBM counter when true.
- * @ci:    Cacheinfo for L3. Only set when @d is NULL. Used when summing domains.
+ * @ci:    Cacheinfo for L3. Only set when @hdr is NULL. Used when summing
+ *	   domains.
  * @is_mbm_cntr: true if "mbm_event" counter assignment mode is enabled and it
  *	   is an MBM event.
  * @err:   Error encountered when reading counter.
- * @val:   Returned value of event counter. If @rgrp is a parent resource group,
- *	   @val includes the sum of event counts from its child resource groups.
- *	   If @d is NULL, @val includes the sum of all domains in @r sharing @ci.id,
- *	   (summed across child resource groups if @rgrp is a parent resource group).
+ * @val:   Returned value of event counter. If @rgrp is a parent resource
+ *	   group, @val includes the sum of event counts from its child
+ *	   resource groups.  If @hdr is NULL, @val includes the sum of all
+ *	   domains in @r sharing @ci.id, (summed across child resource groups
+ *	   if @rgrp is a parent resource group).
  * @arch_mon_ctx: Hardware monitor allocated for this read request (MPAM only).
  */
 struct rmid_read {
 	struct rdtgroup		*rgrp;
 	struct rdt_resource	*r;
-	struct rdt_mon_domain	*d;
-	enum resctrl_event_id	evtid;
+	struct rdt_domain_hdr	*hdr;
+	struct mon_evt		*evt;
 	bool			first;
 	struct cacheinfo	*ci;
 	bool			is_mbm_cntr;
@@ -243,6 +259,8 @@ struct rdtgroup {
 
 #define RFTYPE_ASSIGN_CONFIG		BIT(11)
 
+#define RFTYPE_RES_PERF_PKG		BIT(12)
+
 #define RFTYPE_CTRL_INFO		(RFTYPE_INFO | RFTYPE_CTRL)
 
 #define RFTYPE_MON_INFO			(RFTYPE_INFO | RFTYPE_MON)
@@ -351,23 +369,27 @@ int closids_supported(void);
 
 void closid_free(int closid);
 
+int setup_rmid_lru_list(void);
+
+void free_rmid_lru_list(void);
+
 int alloc_rmid(u32 closid);
 
 void free_rmid(u32 closid, u32 rmid);
 
-void resctrl_mon_resource_exit(void);
+int resctrl_l3_mon_resource_init(void);
+
+void resctrl_l3_mon_resource_exit(void);
 
 void mon_event_count(void *info);
 
 int rdtgroup_mondata_show(struct seq_file *m, void *arg);
 
 void mon_event_read(struct rmid_read *rr, struct rdt_resource *r,
-		    struct rdt_mon_domain *d, struct rdtgroup *rdtgrp,
-		    cpumask_t *cpumask, int evtid, int first);
-
-int resctrl_mon_resource_init(void);
+		    struct rdt_domain_hdr *hdr, struct rdtgroup *rdtgrp,
+		    cpumask_t *cpumask, struct mon_evt *evt, int first);
 
-void mbm_setup_overflow_handler(struct rdt_mon_domain *dom,
+void mbm_setup_overflow_handler(struct rdt_l3_mon_domain *dom,
 				unsigned long delay_ms,
 				int exclude_cpu);
 
@@ -375,14 +397,14 @@ void mbm_handle_overflow(struct work_struct *work);
 
 bool is_mba_sc(struct rdt_resource *r);
 
-void cqm_setup_limbo_handler(struct rdt_mon_domain *dom, unsigned long delay_ms,
+void cqm_setup_limbo_handler(struct rdt_l3_mon_domain *dom, unsigned long delay_ms,
 			     int exclude_cpu);
 
 void cqm_handle_limbo(struct work_struct *work);
 
-bool has_busy_rmid(struct rdt_mon_domain *d);
+bool has_busy_rmid(struct rdt_l3_mon_domain *d);
 
-void __check_limbo(struct rdt_mon_domain *d, bool force_free);
+void __check_limbo(struct rdt_l3_mon_domain *d, bool force_free);
 
 void resctrl_file_fflags_init(const char *config, unsigned long fflags);
 
diff --git a/fs/resctrl/monitor.c b/fs/resctrl/monitor.c
index 572a9925bd6c..0cd5476a483a 100644
--- a/fs/resctrl/monitor.c
+++ b/fs/resctrl/monitor.c
@@ -130,16 +130,18 @@ static void limbo_release_entry(struct rmid_entry *entry)
  * decrement the count. If the busy count gets to zero on an RMID, we
  * free the RMID
  */
-void __check_limbo(struct rdt_mon_domain *d, bool force_free)
+void __check_limbo(struct rdt_l3_mon_domain *d, bool force_free)
 {
 	struct rdt_resource *r = resctrl_arch_get_resource(RDT_RESOURCE_L3);
 	u32 idx_limit = resctrl_arch_system_num_rmid_idx();
 	struct rmid_entry *entry;
 	u32 idx, cur_idx = 1;
 	void *arch_mon_ctx;
+	void *arch_priv;
 	bool rmid_dirty;
 	u64 val = 0;
 
+	arch_priv = mon_event_all[QOS_L3_OCCUP_EVENT_ID].arch_priv;
 	arch_mon_ctx = resctrl_arch_mon_ctx_alloc(r, QOS_L3_OCCUP_EVENT_ID);
 	if (IS_ERR(arch_mon_ctx)) {
 		pr_warn_ratelimited("Failed to allocate monitor context: %ld",
@@ -159,8 +161,8 @@ void __check_limbo(struct rdt_mon_domain *d, bool force_free)
 			break;
 
 		entry = __rmid_entry(idx);
-		if (resctrl_arch_rmid_read(r, d, entry->closid, entry->rmid,
-					   QOS_L3_OCCUP_EVENT_ID, &val,
+		if (resctrl_arch_rmid_read(r, &d->hdr, entry->closid, entry->rmid,
+					   QOS_L3_OCCUP_EVENT_ID, arch_priv, &val,
 					   arch_mon_ctx)) {
 			rmid_dirty = true;
 		} else {
@@ -188,7 +190,7 @@ void __check_limbo(struct rdt_mon_domain *d, bool force_free)
 	resctrl_arch_mon_ctx_free(r, QOS_L3_OCCUP_EVENT_ID, arch_mon_ctx);
 }
 
-bool has_busy_rmid(struct rdt_mon_domain *d)
+bool has_busy_rmid(struct rdt_l3_mon_domain *d)
 {
 	u32 idx_limit = resctrl_arch_system_num_rmid_idx();
 
@@ -289,7 +291,7 @@ int alloc_rmid(u32 closid)
 static void add_rmid_to_limbo(struct rmid_entry *entry)
 {
 	struct rdt_resource *r = resctrl_arch_get_resource(RDT_RESOURCE_L3);
-	struct rdt_mon_domain *d;
+	struct rdt_l3_mon_domain *d;
 	u32 idx;
 
 	lockdep_assert_held(&rdtgroup_mutex);
@@ -342,7 +344,7 @@ void free_rmid(u32 closid, u32 rmid)
 		list_add_tail(&entry->list, &rmid_free_lru);
 }
 
-static struct mbm_state *get_mbm_state(struct rdt_mon_domain *d, u32 closid,
+static struct mbm_state *get_mbm_state(struct rdt_l3_mon_domain *d, u32 closid,
 				       u32 rmid, enum resctrl_event_id evtid)
 {
 	u32 idx = resctrl_arch_rmid_idx_encode(closid, rmid);
@@ -362,7 +364,7 @@ static struct mbm_state *get_mbm_state(struct rdt_mon_domain *d, u32 closid,
  * Return:
  * Valid counter ID on success, or -ENOENT on failure.
  */
-static int mbm_cntr_get(struct rdt_resource *r, struct rdt_mon_domain *d,
+static int mbm_cntr_get(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 			struct rdtgroup *rdtgrp, enum resctrl_event_id evtid)
 {
 	int cntr_id;
@@ -389,7 +391,7 @@ static int mbm_cntr_get(struct rdt_resource *r, struct rdt_mon_domain *d,
  * Return:
  * Valid counter ID on success, or -ENOSPC on failure.
  */
-static int mbm_cntr_alloc(struct rdt_resource *r, struct rdt_mon_domain *d,
+static int mbm_cntr_alloc(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 			  struct rdtgroup *rdtgrp, enum resctrl_event_id evtid)
 {
 	int cntr_id;
@@ -408,24 +410,29 @@ static int mbm_cntr_alloc(struct rdt_resource *r, struct rdt_mon_domain *d,
 /*
  * mbm_cntr_free() - Clear the counter ID configuration details in the domain @d.
  */
-static void mbm_cntr_free(struct rdt_mon_domain *d, int cntr_id)
+static void mbm_cntr_free(struct rdt_l3_mon_domain *d, int cntr_id)
 {
 	memset(&d->cntr_cfg[cntr_id], 0, sizeof(*d->cntr_cfg));
 }
 
-static int __mon_event_count(struct rdtgroup *rdtgrp, struct rmid_read *rr)
+static int __l3_mon_event_count(struct rdtgroup *rdtgrp, struct rmid_read *rr)
 {
 	int cpu = smp_processor_id();
 	u32 closid = rdtgrp->closid;
 	u32 rmid = rdtgrp->mon.rmid;
-	struct rdt_mon_domain *d;
+	struct rdt_l3_mon_domain *d;
 	int cntr_id = -ENOENT;
 	struct mbm_state *m;
-	int err, ret;
 	u64 tval = 0;
 
+	if (!domain_header_is_valid(rr->hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3)) {
+		rr->err = -EIO;
+		return -EINVAL;
+	}
+	d = container_of(rr->hdr, struct rdt_l3_mon_domain, hdr);
+
 	if (rr->is_mbm_cntr) {
-		cntr_id = mbm_cntr_get(rr->r, rr->d, rdtgrp, rr->evtid);
+		cntr_id = mbm_cntr_get(rr->r, d, rdtgrp, rr->evt->evtid);
 		if (cntr_id < 0) {
 			rr->err = -ENOENT;
 			return -EINVAL;
@@ -434,31 +441,51 @@ static int __mon_event_count(struct rdtgroup *rdtgrp, struct rmid_read *rr)
 
 	if (rr->first) {
 		if (rr->is_mbm_cntr)
-			resctrl_arch_reset_cntr(rr->r, rr->d, closid, rmid, cntr_id, rr->evtid);
+			resctrl_arch_reset_cntr(rr->r, d, closid, rmid, cntr_id, rr->evt->evtid);
 		else
-			resctrl_arch_reset_rmid(rr->r, rr->d, closid, rmid, rr->evtid);
-		m = get_mbm_state(rr->d, closid, rmid, rr->evtid);
+			resctrl_arch_reset_rmid(rr->r, d, closid, rmid, rr->evt->evtid);
+		m = get_mbm_state(d, closid, rmid, rr->evt->evtid);
 		if (m)
 			memset(m, 0, sizeof(struct mbm_state));
 		return 0;
 	}
 
-	if (rr->d) {
-		/* Reading a single domain, must be on a CPU in that domain. */
-		if (!cpumask_test_cpu(cpu, &rr->d->hdr.cpu_mask))
-			return -EINVAL;
-		if (rr->is_mbm_cntr)
-			rr->err = resctrl_arch_cntr_read(rr->r, rr->d, closid, rmid, cntr_id,
-							 rr->evtid, &tval);
-		else
-			rr->err = resctrl_arch_rmid_read(rr->r, rr->d, closid, rmid,
-							 rr->evtid, &tval, rr->arch_mon_ctx);
-		if (rr->err)
-			return rr->err;
+	/* Reading a single domain, must be on a CPU in that domain. */
+	if (!cpumask_test_cpu(cpu, &d->hdr.cpu_mask))
+		return -EINVAL;
+	if (rr->is_mbm_cntr)
+		rr->err = resctrl_arch_cntr_read(rr->r, d, closid, rmid, cntr_id,
+						 rr->evt->evtid, &tval);
+	else
+		rr->err = resctrl_arch_rmid_read(rr->r, rr->hdr, closid, rmid,
+						 rr->evt->evtid, rr->evt->arch_priv,
+						 &tval, rr->arch_mon_ctx);
+	if (rr->err)
+		return rr->err;
 
-		rr->val += tval;
+	rr->val += tval;
 
-		return 0;
+	return 0;
+}
+
+static int __l3_mon_event_count_sum(struct rdtgroup *rdtgrp, struct rmid_read *rr)
+{
+	int cpu = smp_processor_id();
+	u32 closid = rdtgrp->closid;
+	u32 rmid = rdtgrp->mon.rmid;
+	struct rdt_l3_mon_domain *d;
+	u64 tval = 0;
+	int err, ret;
+
+	/*
+	 * Summing across domains is only done for systems that implement
+	 * Sub-NUMA Cluster. There is no overlap with systems that support
+	 * assignable counters.
+	 */
+	if (rr->is_mbm_cntr) {
+		pr_warn_once("Summing domains using assignable counters is not supported\n");
+		rr->err = -EINVAL;
+		return -EINVAL;
 	}
 
 	/* Summing domains that share a cache, must be on a CPU for that cache. */
@@ -476,12 +503,9 @@ static int __mon_event_count(struct rdtgroup *rdtgrp, struct rmid_read *rr)
 	list_for_each_entry(d, &rr->r->mon_domains, hdr.list) {
 		if (d->ci_id != rr->ci->id)
 			continue;
-		if (rr->is_mbm_cntr)
-			err = resctrl_arch_cntr_read(rr->r, d, closid, rmid, cntr_id,
-						     rr->evtid, &tval);
-		else
-			err = resctrl_arch_rmid_read(rr->r, d, closid, rmid,
-						     rr->evtid, &tval, rr->arch_mon_ctx);
+		err = resctrl_arch_rmid_read(rr->r, &d->hdr, closid, rmid,
+					     rr->evt->evtid, rr->evt->arch_priv,
+					     &tval, rr->arch_mon_ctx);
 		if (!err) {
 			rr->val += tval;
 			ret = 0;
@@ -494,6 +518,35 @@ static int __mon_event_count(struct rdtgroup *rdtgrp, struct rmid_read *rr)
 	return ret;
 }
 
+static int __mon_event_count(struct rdtgroup *rdtgrp, struct rmid_read *rr)
+{
+	switch (rr->r->rid) {
+	case RDT_RESOURCE_L3:
+		WARN_ON_ONCE(rr->evt->any_cpu);
+		if (rr->hdr)
+			return __l3_mon_event_count(rdtgrp, rr);
+		else
+			return __l3_mon_event_count_sum(rdtgrp, rr);
+	case RDT_RESOURCE_PERF_PKG: {
+		u64 tval = 0;
+
+		rr->err = resctrl_arch_rmid_read(rr->r, rr->hdr, rdtgrp->closid,
+						 rdtgrp->mon.rmid, rr->evt->evtid,
+						 rr->evt->arch_priv,
+						 &tval, rr->arch_mon_ctx);
+		if (rr->err)
+			return rr->err;
+
+		rr->val += tval;
+
+		return 0;
+	}
+	default:
+		rr->err = -EINVAL;
+		return -EINVAL;
+	}
+}
+
 /*
  * mbm_bw_count() - Update bw count from values previously read by
  *		    __mon_event_count().
@@ -511,9 +564,13 @@ static void mbm_bw_count(struct rdtgroup *rdtgrp, struct rmid_read *rr)
 	u64 cur_bw, bytes, cur_bytes;
 	u32 closid = rdtgrp->closid;
 	u32 rmid = rdtgrp->mon.rmid;
+	struct rdt_l3_mon_domain *d;
 	struct mbm_state *m;
 
-	m = get_mbm_state(rr->d, closid, rmid, rr->evtid);
+	if (!domain_header_is_valid(rr->hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3))
+		return;
+	d = container_of(rr->hdr, struct rdt_l3_mon_domain, hdr);
+	m = get_mbm_state(d, closid, rmid, rr->evt->evtid);
 	if (WARN_ON_ONCE(!m))
 		return;
 
@@ -612,7 +669,7 @@ static struct rdt_ctrl_domain *get_ctrl_domain_from_cpu(int cpu,
  * throttle MSRs already have low percentage values.  To avoid
  * unnecessarily restricting such rdtgroups, we also increase the bandwidth.
  */
-static void update_mba_bw(struct rdtgroup *rgrp, struct rdt_mon_domain *dom_mbm)
+static void update_mba_bw(struct rdtgroup *rgrp, struct rdt_l3_mon_domain *dom_mbm)
 {
 	u32 closid, rmid, cur_msr_val, new_msr_val;
 	struct mbm_state *pmbm_data, *cmbm_data;
@@ -680,18 +737,18 @@ static void update_mba_bw(struct rdtgroup *rgrp, struct rdt_mon_domain *dom_mbm)
 	resctrl_arch_update_one(r_mba, dom_mba, closid, CDP_NONE, new_msr_val);
 }
 
-static void mbm_update_one_event(struct rdt_resource *r, struct rdt_mon_domain *d,
+static void mbm_update_one_event(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 				 struct rdtgroup *rdtgrp, enum resctrl_event_id evtid)
 {
 	struct rmid_read rr = {0};
 
 	rr.r = r;
-	rr.d = d;
-	rr.evtid = evtid;
+	rr.hdr = &d->hdr;
+	rr.evt = &mon_event_all[evtid];
 	if (resctrl_arch_mbm_cntr_assign_enabled(r)) {
 		rr.is_mbm_cntr = true;
 	} else {
-		rr.arch_mon_ctx = resctrl_arch_mon_ctx_alloc(rr.r, rr.evtid);
+		rr.arch_mon_ctx = resctrl_arch_mon_ctx_alloc(rr.r, evtid);
 		if (IS_ERR(rr.arch_mon_ctx)) {
 			pr_warn_ratelimited("Failed to allocate monitor context: %ld",
 					    PTR_ERR(rr.arch_mon_ctx));
@@ -709,10 +766,10 @@ static void mbm_update_one_event(struct rdt_resource *r, struct rdt_mon_domain *
 		mbm_bw_count(rdtgrp, &rr);
 
 	if (rr.arch_mon_ctx)
-		resctrl_arch_mon_ctx_free(rr.r, rr.evtid, rr.arch_mon_ctx);
+		resctrl_arch_mon_ctx_free(rr.r, evtid, rr.arch_mon_ctx);
 }
 
-static void mbm_update(struct rdt_resource *r, struct rdt_mon_domain *d,
+static void mbm_update(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 		       struct rdtgroup *rdtgrp)
 {
 	/*
@@ -733,12 +790,12 @@ static void mbm_update(struct rdt_resource *r, struct rdt_mon_domain *d,
 void cqm_handle_limbo(struct work_struct *work)
 {
 	unsigned long delay = msecs_to_jiffies(CQM_LIMBOCHECK_INTERVAL);
-	struct rdt_mon_domain *d;
+	struct rdt_l3_mon_domain *d;
 
 	cpus_read_lock();
 	mutex_lock(&rdtgroup_mutex);
 
-	d = container_of(work, struct rdt_mon_domain, cqm_limbo.work);
+	d = container_of(work, struct rdt_l3_mon_domain, cqm_limbo.work);
 
 	__check_limbo(d, false);
 
@@ -761,7 +818,7 @@ void cqm_handle_limbo(struct work_struct *work)
  * @exclude_cpu:   Which CPU the handler should not run on,
  *		   RESCTRL_PICK_ANY_CPU to pick any CPU.
  */
-void cqm_setup_limbo_handler(struct rdt_mon_domain *dom, unsigned long delay_ms,
+void cqm_setup_limbo_handler(struct rdt_l3_mon_domain *dom, unsigned long delay_ms,
 			     int exclude_cpu)
 {
 	unsigned long delay = msecs_to_jiffies(delay_ms);
@@ -778,7 +835,7 @@ void mbm_handle_overflow(struct work_struct *work)
 {
 	unsigned long delay = msecs_to_jiffies(MBM_OVERFLOW_INTERVAL);
 	struct rdtgroup *prgrp, *crgrp;
-	struct rdt_mon_domain *d;
+	struct rdt_l3_mon_domain *d;
 	struct list_head *head;
 	struct rdt_resource *r;
 
@@ -793,7 +850,7 @@ void mbm_handle_overflow(struct work_struct *work)
 		goto out_unlock;
 
 	r = resctrl_arch_get_resource(RDT_RESOURCE_L3);
-	d = container_of(work, struct rdt_mon_domain, mbm_over.work);
+	d = container_of(work, struct rdt_l3_mon_domain, mbm_over.work);
 
 	list_for_each_entry(prgrp, &rdt_all_groups, rdtgroup_list) {
 		mbm_update(r, d, prgrp);
@@ -827,7 +884,7 @@ out_unlock:
  * @exclude_cpu:   Which CPU the handler should not run on,
  *		   RESCTRL_PICK_ANY_CPU to pick any CPU.
  */
-void mbm_setup_overflow_handler(struct rdt_mon_domain *dom, unsigned long delay_ms,
+void mbm_setup_overflow_handler(struct rdt_l3_mon_domain *dom, unsigned long delay_ms,
 				int exclude_cpu)
 {
 	unsigned long delay = msecs_to_jiffies(delay_ms);
@@ -846,42 +903,29 @@ void mbm_setup_overflow_handler(struct rdt_mon_domain *dom, unsigned long delay_
 		schedule_delayed_work_on(cpu, &dom->mbm_over, delay);
 }
 
-static int dom_data_init(struct rdt_resource *r)
+int setup_rmid_lru_list(void)
 {
-	u32 idx_limit = resctrl_arch_system_num_rmid_idx();
-	u32 num_closid = resctrl_arch_get_num_closid(r);
 	struct rmid_entry *entry = NULL;
-	int err = 0, i;
+	u32 idx_limit;
 	u32 idx;
+	int i;
 
-	mutex_lock(&rdtgroup_mutex);
-	if (IS_ENABLED(CONFIG_RESCTRL_RMID_DEPENDS_ON_CLOSID)) {
-		u32 *tmp;
-
-		/*
-		 * If the architecture hasn't provided a sanitised value here,
-		 * this may result in larger arrays than necessary. Resctrl will
-		 * use a smaller system wide value based on the resources in
-		 * use.
-		 */
-		tmp = kcalloc(num_closid, sizeof(*tmp), GFP_KERNEL);
-		if (!tmp) {
-			err = -ENOMEM;
-			goto out_unlock;
-		}
+	if (!resctrl_arch_mon_capable())
+		return 0;
 
-		closid_num_dirty_rmid = tmp;
-	}
+	/*
+	 * Called on every mount, but the number of RMIDs cannot change
+	 * after the first mount, so keep using the same set of rmid_ptrs[]
+	 * until resctrl_exit(). Note that the limbo handler continues to
+	 * access rmid_ptrs[] after resctrl is unmounted.
+	 */
+	if (rmid_ptrs)
+		return 0;
 
+	idx_limit = resctrl_arch_system_num_rmid_idx();
 	rmid_ptrs = kcalloc(idx_limit, sizeof(struct rmid_entry), GFP_KERNEL);
-	if (!rmid_ptrs) {
-		if (IS_ENABLED(CONFIG_RESCTRL_RMID_DEPENDS_ON_CLOSID)) {
-			kfree(closid_num_dirty_rmid);
-			closid_num_dirty_rmid = NULL;
-		}
-		err = -ENOMEM;
-		goto out_unlock;
-	}
+	if (!rmid_ptrs)
+		return -ENOMEM;
 
 	for (i = 0; i < idx_limit; i++) {
 		entry = &rmid_ptrs[i];
@@ -894,71 +938,76 @@ static int dom_data_init(struct rdt_resource *r)
 	/*
 	 * RESCTRL_RESERVED_CLOSID and RESCTRL_RESERVED_RMID are special and
 	 * are always allocated. These are used for the rdtgroup_default
-	 * control group, which will be setup later in resctrl_init().
+	 * control group, which was setup earlier in rdtgroup_setup_default().
 	 */
 	idx = resctrl_arch_rmid_idx_encode(RESCTRL_RESERVED_CLOSID,
 					   RESCTRL_RESERVED_RMID);
 	entry = __rmid_entry(idx);
 	list_del(&entry->list);
 
-out_unlock:
-	mutex_unlock(&rdtgroup_mutex);
-
-	return err;
+	return 0;
 }
 
-static void dom_data_exit(struct rdt_resource *r)
+void free_rmid_lru_list(void)
 {
-	mutex_lock(&rdtgroup_mutex);
-
-	if (!r->mon_capable)
-		goto out_unlock;
-
-	if (IS_ENABLED(CONFIG_RESCTRL_RMID_DEPENDS_ON_CLOSID)) {
-		kfree(closid_num_dirty_rmid);
-		closid_num_dirty_rmid = NULL;
-	}
+	if (!resctrl_arch_mon_capable())
+		return;
 
+	mutex_lock(&rdtgroup_mutex);
 	kfree(rmid_ptrs);
 	rmid_ptrs = NULL;
-
-out_unlock:
 	mutex_unlock(&rdtgroup_mutex);
 }
 
+#define MON_EVENT(_eventid, _name, _res, _fp)	\
+	[_eventid] = {				\
+	.name			= _name,	\
+	.evtid			= _eventid,	\
+	.rid			= _res,		\
+	.is_floating_point	= _fp,		\
+}
+
 /*
  * All available events. Architecture code marks the ones that
  * are supported by a system using resctrl_enable_mon_event()
  * to set .enabled.
  */
 struct mon_evt mon_event_all[QOS_NUM_EVENTS] = {
-	[QOS_L3_OCCUP_EVENT_ID] = {
-		.name	= "llc_occupancy",
-		.evtid	= QOS_L3_OCCUP_EVENT_ID,
-		.rid	= RDT_RESOURCE_L3,
-	},
-	[QOS_L3_MBM_TOTAL_EVENT_ID] = {
-		.name	= "mbm_total_bytes",
-		.evtid	= QOS_L3_MBM_TOTAL_EVENT_ID,
-		.rid	= RDT_RESOURCE_L3,
-	},
-	[QOS_L3_MBM_LOCAL_EVENT_ID] = {
-		.name	= "mbm_local_bytes",
-		.evtid	= QOS_L3_MBM_LOCAL_EVENT_ID,
-		.rid	= RDT_RESOURCE_L3,
-	},
+	MON_EVENT(QOS_L3_OCCUP_EVENT_ID,		"llc_occupancy",	RDT_RESOURCE_L3,	false),
+	MON_EVENT(QOS_L3_MBM_TOTAL_EVENT_ID,		"mbm_total_bytes",	RDT_RESOURCE_L3,	false),
+	MON_EVENT(QOS_L3_MBM_LOCAL_EVENT_ID,		"mbm_local_bytes",	RDT_RESOURCE_L3,	false),
+	MON_EVENT(PMT_EVENT_ENERGY,			"core_energy",		RDT_RESOURCE_PERF_PKG,	true),
+	MON_EVENT(PMT_EVENT_ACTIVITY,			"activity",		RDT_RESOURCE_PERF_PKG,	true),
+	MON_EVENT(PMT_EVENT_STALLS_LLC_HIT,		"stalls_llc_hit",	RDT_RESOURCE_PERF_PKG,	false),
+	MON_EVENT(PMT_EVENT_C1_RES,			"c1_res",		RDT_RESOURCE_PERF_PKG,	false),
+	MON_EVENT(PMT_EVENT_UNHALTED_CORE_CYCLES,	"unhalted_core_cycles",	RDT_RESOURCE_PERF_PKG,	false),
+	MON_EVENT(PMT_EVENT_STALLS_LLC_MISS,		"stalls_llc_miss",	RDT_RESOURCE_PERF_PKG,	false),
+	MON_EVENT(PMT_EVENT_AUTO_C6_RES,		"c6_res",		RDT_RESOURCE_PERF_PKG,	false),
+	MON_EVENT(PMT_EVENT_UNHALTED_REF_CYCLES,	"unhalted_ref_cycles",	RDT_RESOURCE_PERF_PKG,	false),
+	MON_EVENT(PMT_EVENT_UOPS_RETIRED,		"uops_retired",		RDT_RESOURCE_PERF_PKG,	false),
 };
 
-void resctrl_enable_mon_event(enum resctrl_event_id eventid)
+bool resctrl_enable_mon_event(enum resctrl_event_id eventid, bool any_cpu,
+			      unsigned int binary_bits, void *arch_priv)
 {
-	if (WARN_ON_ONCE(eventid < QOS_FIRST_EVENT || eventid >= QOS_NUM_EVENTS))
-		return;
+	if (WARN_ON_ONCE(eventid < QOS_FIRST_EVENT || eventid >= QOS_NUM_EVENTS ||
+			 binary_bits > MAX_BINARY_BITS))
+		return false;
 	if (mon_event_all[eventid].enabled) {
 		pr_warn("Duplicate enable for event %d\n", eventid);
-		return;
+		return false;
+	}
+	if (binary_bits && !mon_event_all[eventid].is_floating_point) {
+		pr_warn("Event %d may not be floating point\n", eventid);
+		return false;
 	}
 
+	mon_event_all[eventid].any_cpu = any_cpu;
+	mon_event_all[eventid].binary_bits = binary_bits;
+	mon_event_all[eventid].arch_priv = arch_priv;
 	mon_event_all[eventid].enabled = true;
+
+	return true;
 }
 
 bool resctrl_is_mon_event_enabled(enum resctrl_event_id eventid)
@@ -1082,7 +1131,7 @@ out_unlock:
  * mbm_cntr_free_all() - Clear all the counter ID configuration details in the
  *			 domain @d. Called when mbm_assign_mode is changed.
  */
-static void mbm_cntr_free_all(struct rdt_resource *r, struct rdt_mon_domain *d)
+static void mbm_cntr_free_all(struct rdt_resource *r, struct rdt_l3_mon_domain *d)
 {
 	memset(d->cntr_cfg, 0, sizeof(*d->cntr_cfg) * r->mon.num_mbm_cntrs);
 }
@@ -1091,7 +1140,7 @@ static void mbm_cntr_free_all(struct rdt_resource *r, struct rdt_mon_domain *d)
  * resctrl_reset_rmid_all() - Reset all non-architecture states for all the
  *			      supported RMIDs.
  */
-static void resctrl_reset_rmid_all(struct rdt_resource *r, struct rdt_mon_domain *d)
+static void resctrl_reset_rmid_all(struct rdt_resource *r, struct rdt_l3_mon_domain *d)
 {
 	u32 idx_limit = resctrl_arch_system_num_rmid_idx();
 	enum resctrl_event_id evt;
@@ -1112,7 +1161,7 @@ static void resctrl_reset_rmid_all(struct rdt_resource *r, struct rdt_mon_domain
  * Assign the counter if @assign is true else unassign the counter. Reset the
  * associated non-architectural state.
  */
-static void rdtgroup_assign_cntr(struct rdt_resource *r, struct rdt_mon_domain *d,
+static void rdtgroup_assign_cntr(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 				 enum resctrl_event_id evtid, u32 rmid, u32 closid,
 				 u32 cntr_id, bool assign)
 {
@@ -1132,7 +1181,7 @@ static void rdtgroup_assign_cntr(struct rdt_resource *r, struct rdt_mon_domain *
  * Return:
  * 0 on success, < 0 on failure.
  */
-static int rdtgroup_alloc_assign_cntr(struct rdt_resource *r, struct rdt_mon_domain *d,
+static int rdtgroup_alloc_assign_cntr(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 				      struct rdtgroup *rdtgrp, struct mon_evt *mevt)
 {
 	int cntr_id;
@@ -1167,7 +1216,7 @@ static int rdtgroup_alloc_assign_cntr(struct rdt_resource *r, struct rdt_mon_dom
  * Return:
  * 0 on success, < 0 on failure.
  */
-static int rdtgroup_assign_cntr_event(struct rdt_mon_domain *d, struct rdtgroup *rdtgrp,
+static int rdtgroup_assign_cntr_event(struct rdt_l3_mon_domain *d, struct rdtgroup *rdtgrp,
 				      struct mon_evt *mevt)
 {
 	struct rdt_resource *r = resctrl_arch_get_resource(mevt->rid);
@@ -1217,7 +1266,7 @@ void rdtgroup_assign_cntrs(struct rdtgroup *rdtgrp)
  * rdtgroup_free_unassign_cntr() - Unassign and reset the counter ID configuration
  * for the event pointed to by @mevt within the domain @d and resctrl group @rdtgrp.
  */
-static void rdtgroup_free_unassign_cntr(struct rdt_resource *r, struct rdt_mon_domain *d,
+static void rdtgroup_free_unassign_cntr(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 					struct rdtgroup *rdtgrp, struct mon_evt *mevt)
 {
 	int cntr_id;
@@ -1238,7 +1287,7 @@ static void rdtgroup_free_unassign_cntr(struct rdt_resource *r, struct rdt_mon_d
  * the event structure @mevt from the domain @d and the group @rdtgrp. Unassign
  * the counters from all the domains if @d is NULL else unassign from @d.
  */
-static void rdtgroup_unassign_cntr_event(struct rdt_mon_domain *d, struct rdtgroup *rdtgrp,
+static void rdtgroup_unassign_cntr_event(struct rdt_l3_mon_domain *d, struct rdtgroup *rdtgrp,
 					 struct mon_evt *mevt)
 {
 	struct rdt_resource *r = resctrl_arch_get_resource(mevt->rid);
@@ -1313,7 +1362,7 @@ next_config:
 static void rdtgroup_update_cntr_event(struct rdt_resource *r, struct rdtgroup *rdtgrp,
 				       enum resctrl_event_id evtid)
 {
-	struct rdt_mon_domain *d;
+	struct rdt_l3_mon_domain *d;
 	int cntr_id;
 
 	list_for_each_entry(d, &r->mon_domains, hdr.list) {
@@ -1419,7 +1468,7 @@ ssize_t resctrl_mbm_assign_mode_write(struct kernfs_open_file *of, char *buf,
 				      size_t nbytes, loff_t off)
 {
 	struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
-	struct rdt_mon_domain *d;
+	struct rdt_l3_mon_domain *d;
 	int ret = 0;
 	bool enable;
 
@@ -1492,7 +1541,7 @@ int resctrl_num_mbm_cntrs_show(struct kernfs_open_file *of,
 			       struct seq_file *s, void *v)
 {
 	struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
-	struct rdt_mon_domain *dom;
+	struct rdt_l3_mon_domain *dom;
 	bool sep = false;
 
 	cpus_read_lock();
@@ -1516,7 +1565,7 @@ int resctrl_available_mbm_cntrs_show(struct kernfs_open_file *of,
 				     struct seq_file *s, void *v)
 {
 	struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
-	struct rdt_mon_domain *dom;
+	struct rdt_l3_mon_domain *dom;
 	bool sep = false;
 	u32 cntrs, i;
 	int ret = 0;
@@ -1557,7 +1606,7 @@ out_unlock:
 int mbm_L3_assignments_show(struct kernfs_open_file *of, struct seq_file *s, void *v)
 {
 	struct rdt_resource *r = resctrl_arch_get_resource(RDT_RESOURCE_L3);
-	struct rdt_mon_domain *d;
+	struct rdt_l3_mon_domain *d;
 	struct rdtgroup *rdtgrp;
 	struct mon_evt *mevt;
 	int ret = 0;
@@ -1620,7 +1669,7 @@ static struct mon_evt *mbm_get_mon_event_by_name(struct rdt_resource *r, char *n
 	return NULL;
 }
 
-static int rdtgroup_modify_assign_state(char *assign, struct rdt_mon_domain *d,
+static int rdtgroup_modify_assign_state(char *assign, struct rdt_l3_mon_domain *d,
 					struct rdtgroup *rdtgrp, struct mon_evt *mevt)
 {
 	int ret = 0;
@@ -1646,7 +1695,7 @@ static int rdtgroup_modify_assign_state(char *assign, struct rdt_mon_domain *d,
 static int resctrl_parse_mbm_assignment(struct rdt_resource *r, struct rdtgroup *rdtgrp,
 					char *event, char *tok)
 {
-	struct rdt_mon_domain *d;
+	struct rdt_l3_mon_domain *d;
 	unsigned long dom_id = 0;
 	char *dom_str, *id_str;
 	struct mon_evt *mevt;
@@ -1741,19 +1790,59 @@ ssize_t mbm_L3_assignments_write(struct kernfs_open_file *of, char *buf,
 	return ret ?: nbytes;
 }
 
+static int closid_num_dirty_rmid_alloc(struct rdt_resource *r)
+{
+	if (IS_ENABLED(CONFIG_RESCTRL_RMID_DEPENDS_ON_CLOSID)) {
+		u32 num_closid = resctrl_arch_get_num_closid(r);
+		u32 *tmp;
+
+		/* For ARM memory ordering access to closid_num_dirty_rmid */
+		mutex_lock(&rdtgroup_mutex);
+
+		/*
+		 * If the architecture hasn't provided a sanitised value here,
+		 * this may result in larger arrays than necessary. Resctrl will
+		 * use a smaller system wide value based on the resources in
+		 * use.
+		 */
+		tmp = kcalloc(num_closid, sizeof(*tmp), GFP_KERNEL);
+		if (!tmp) {
+			mutex_unlock(&rdtgroup_mutex);
+			return -ENOMEM;
+		}
+
+		closid_num_dirty_rmid = tmp;
+
+		mutex_unlock(&rdtgroup_mutex);
+	}
+
+	return 0;
+}
+
+static void closid_num_dirty_rmid_free(void)
+{
+	if (IS_ENABLED(CONFIG_RESCTRL_RMID_DEPENDS_ON_CLOSID)) {
+		mutex_lock(&rdtgroup_mutex);
+		kfree(closid_num_dirty_rmid);
+		closid_num_dirty_rmid = NULL;
+		mutex_unlock(&rdtgroup_mutex);
+	}
+}
+
 /**
- * resctrl_mon_resource_init() - Initialise global monitoring structures.
+ * resctrl_l3_mon_resource_init() - Initialise global monitoring structures.
  *
  * Allocate and initialise global monitor resources that do not belong to a
- * specific domain. i.e. the rmid_ptrs[] used for the limbo and free lists.
+ * specific domain. i.e. the closid_num_dirty_rmid[] used to find the CLOSID
+ * with the cleanest set of RMIDs.
  * Called once during boot after the struct rdt_resource's have been configured
  * but before the filesystem is mounted.
  * Resctrl's cpuhp callbacks may be called before this point to bring a domain
  * online.
  *
- * Returns 0 for success, or -ENOMEM.
+ * Return: 0 for success, or -ENOMEM.
  */
-int resctrl_mon_resource_init(void)
+int resctrl_l3_mon_resource_init(void)
 {
 	struct rdt_resource *r = resctrl_arch_get_resource(RDT_RESOURCE_L3);
 	int ret;
@@ -1761,7 +1850,7 @@ int resctrl_mon_resource_init(void)
 	if (!r->mon_capable)
 		return 0;
 
-	ret = dom_data_init(r);
+	ret = closid_num_dirty_rmid_alloc(r);
 	if (ret)
 		return ret;
 
@@ -1803,9 +1892,12 @@ int resctrl_mon_resource_init(void)
 	return 0;
 }
 
-void resctrl_mon_resource_exit(void)
+void resctrl_l3_mon_resource_exit(void)
 {
 	struct rdt_resource *r = resctrl_arch_get_resource(RDT_RESOURCE_L3);
 
-	dom_data_exit(r);
+	if (!r->mon_capable)
+		return;
+
+	closid_num_dirty_rmid_free();
 }
diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c
index 8e39dfda56bc..ba8d503551cd 100644
--- a/fs/resctrl/rdtgroup.c
+++ b/fs/resctrl/rdtgroup.c
@@ -18,6 +18,7 @@
 #include <linux/fs_parser.h>
 #include <linux/sysfs.h>
 #include <linux/kernfs.h>
+#include <linux/once.h>
 #include <linux/resctrl.h>
 #include <linux/seq_buf.h>
 #include <linux/seq_file.h>
@@ -1157,7 +1158,7 @@ static int rdt_num_rmids_show(struct kernfs_open_file *of,
 {
 	struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
 
-	seq_printf(seq, "%d\n", r->mon.num_rmid);
+	seq_printf(seq, "%u\n", r->mon.num_rmid);
 
 	return 0;
 }
@@ -1640,7 +1641,7 @@ static void mondata_config_read(struct resctrl_mon_config_info *mon_info)
 static int mbm_config_show(struct seq_file *s, struct rdt_resource *r, u32 evtid)
 {
 	struct resctrl_mon_config_info mon_info;
-	struct rdt_mon_domain *dom;
+	struct rdt_l3_mon_domain *dom;
 	bool sep = false;
 
 	cpus_read_lock();
@@ -1688,7 +1689,7 @@ static int mbm_local_bytes_config_show(struct kernfs_open_file *of,
 }
 
 static void mbm_config_write_domain(struct rdt_resource *r,
-				    struct rdt_mon_domain *d, u32 evtid, u32 val)
+				    struct rdt_l3_mon_domain *d, u32 evtid, u32 val)
 {
 	struct resctrl_mon_config_info mon_info = {0};
 
@@ -1729,8 +1730,8 @@ static void mbm_config_write_domain(struct rdt_resource *r,
 static int mon_config_write(struct rdt_resource *r, char *tok, u32 evtid)
 {
 	char *dom_str = NULL, *id_str;
+	struct rdt_l3_mon_domain *d;
 	unsigned long dom_id, val;
-	struct rdt_mon_domain *d;
 
 	/* Walking r->domains, ensure it can't race with cpuhp */
 	lockdep_assert_cpus_held();
@@ -2395,6 +2396,8 @@ static unsigned long fflags_from_resource(struct rdt_resource *r)
 	case RDT_RESOURCE_MBA:
 	case RDT_RESOURCE_SMBA:
 		return RFTYPE_RES_MB;
+	case RDT_RESOURCE_PERF_PKG:
+		return RFTYPE_RES_PERF_PKG;
 	}
 
 	return WARN_ON_ONCE(1);
@@ -2781,10 +2784,12 @@ static int rdt_get_tree(struct fs_context *fc)
 {
 	struct rdt_fs_context *ctx = rdt_fc2context(fc);
 	unsigned long flags = RFTYPE_CTRL_BASE;
-	struct rdt_mon_domain *dom;
+	struct rdt_l3_mon_domain *dom;
 	struct rdt_resource *r;
 	int ret;
 
+	DO_ONCE_SLEEPABLE(resctrl_arch_pre_mount);
+
 	cpus_read_lock();
 	mutex_lock(&rdtgroup_mutex);
 	/*
@@ -2795,6 +2800,10 @@ static int rdt_get_tree(struct fs_context *fc)
 		goto out;
 	}
 
+	ret = setup_rmid_lru_list();
+	if (ret)
+		goto out;
+
 	ret = rdtgroup_setup_root(ctx);
 	if (ret)
 		goto out;
@@ -3091,7 +3100,8 @@ static void rmdir_all_sub(void)
  * @rid:    The resource id for the event file being created.
  * @domid:  The domain id for the event file being created.
  * @mevt:   The type of event file being created.
- * @do_sum: Whether SNC summing monitors are being created.
+ * @do_sum: Whether SNC summing monitors are being created. Only set
+ *	    when @rid == RDT_RESOURCE_L3.
  */
 static struct mon_data *mon_get_kn_priv(enum resctrl_res_level rid, int domid,
 					struct mon_evt *mevt,
@@ -3103,7 +3113,7 @@ static struct mon_data *mon_get_kn_priv(enum resctrl_res_level rid, int domid,
 
 	list_for_each_entry(priv, &mon_data_kn_priv_list, list) {
 		if (priv->rid == rid && priv->domid == domid &&
-		    priv->sum == do_sum && priv->evtid == mevt->evtid)
+		    priv->sum == do_sum && priv->evt == mevt)
 			return priv;
 	}
 
@@ -3114,7 +3124,7 @@ static struct mon_data *mon_get_kn_priv(enum resctrl_res_level rid, int domid,
 	priv->rid = rid;
 	priv->domid = domid;
 	priv->sum = do_sum;
-	priv->evtid = mevt->evtid;
+	priv->evt = mevt;
 	list_add_tail(&priv->list, &mon_data_kn_priv_list);
 
 	return priv;
@@ -3223,23 +3233,24 @@ static void mon_rmdir_one_subdir(struct kernfs_node *pkn, char *name, char *subn
 }
 
 /*
- * Remove all subdirectories of mon_data of ctrl_mon groups
- * and monitor groups for the given domain.
- * Remove files and directories containing "sum" of domain data
- * when last domain being summed is removed.
+ * Remove files and directories for one SNC node. If it is the last node
+ * sharing an L3 cache, then remove the upper level directory containing
+ * the "sum" files too.
  */
-static void rmdir_mondata_subdir_allrdtgrp(struct rdt_resource *r,
-					   struct rdt_mon_domain *d)
+static void rmdir_mondata_subdir_allrdtgrp_snc(struct rdt_resource *r,
+					       struct rdt_domain_hdr *hdr)
 {
 	struct rdtgroup *prgrp, *crgrp;
+	struct rdt_l3_mon_domain *d;
 	char subname[32];
-	bool snc_mode;
 	char name[32];
 
-	snc_mode = r->mon_scope == RESCTRL_L3_NODE;
-	sprintf(name, "mon_%s_%02d", r->name, snc_mode ? d->ci_id : d->hdr.id);
-	if (snc_mode)
-		sprintf(subname, "mon_sub_%s_%02d", r->name, d->hdr.id);
+	if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3))
+		return;
+
+	d = container_of(hdr, struct rdt_l3_mon_domain, hdr);
+	sprintf(name, "mon_%s_%02d", r->name, d->ci_id);
+	sprintf(subname, "mon_sub_%s_%02d", r->name, hdr->id);
 
 	list_for_each_entry(prgrp, &rdt_all_groups, rdtgroup_list) {
 		mon_rmdir_one_subdir(prgrp->mon.mon_data_kn, name, subname);
@@ -3249,47 +3260,89 @@ static void rmdir_mondata_subdir_allrdtgrp(struct rdt_resource *r,
 	}
 }
 
-static int mon_add_all_files(struct kernfs_node *kn, struct rdt_mon_domain *d,
-			     struct rdt_resource *r, struct rdtgroup *prgrp,
-			     bool do_sum)
+/*
+ * Remove all subdirectories of mon_data of ctrl_mon groups
+ * and monitor groups for the given domain.
+ */
+static void rmdir_mondata_subdir_allrdtgrp(struct rdt_resource *r,
+					   struct rdt_domain_hdr *hdr)
+{
+	struct rdtgroup *prgrp, *crgrp;
+	char name[32];
+
+	if (r->rid == RDT_RESOURCE_L3 && r->mon_scope == RESCTRL_L3_NODE) {
+		rmdir_mondata_subdir_allrdtgrp_snc(r, hdr);
+		return;
+	}
+
+	sprintf(name, "mon_%s_%02d", r->name, hdr->id);
+	list_for_each_entry(prgrp, &rdt_all_groups, rdtgroup_list) {
+		kernfs_remove_by_name(prgrp->mon.mon_data_kn, name);
+
+		list_for_each_entry(crgrp, &prgrp->mon.crdtgrp_list, mon.crdtgrp_list)
+			kernfs_remove_by_name(crgrp->mon.mon_data_kn, name);
+	}
+}
+
+/*
+ * Create a directory for a domain and populate it with monitor files. Create
+ * summing monitors when @hdr is NULL. No need to initialize summing monitors.
+ */
+static struct kernfs_node *_mkdir_mondata_subdir(struct kernfs_node *parent_kn, char *name,
+						 struct rdt_domain_hdr *hdr,
+						 struct rdt_resource *r,
+						 struct rdtgroup *prgrp, int domid)
 {
 	struct rmid_read rr = {0};
+	struct kernfs_node *kn;
 	struct mon_data *priv;
 	struct mon_evt *mevt;
-	int ret, domid;
+	int ret;
+
+	kn = kernfs_create_dir(parent_kn, name, parent_kn->mode, prgrp);
+	if (IS_ERR(kn))
+		return kn;
+
+	ret = rdtgroup_kn_set_ugid(kn);
+	if (ret)
+		goto out_destroy;
 
 	for_each_mon_event(mevt) {
 		if (mevt->rid != r->rid || !mevt->enabled)
 			continue;
-		domid = do_sum ? d->ci_id : d->hdr.id;
-		priv = mon_get_kn_priv(r->rid, domid, mevt, do_sum);
-		if (WARN_ON_ONCE(!priv))
-			return -EINVAL;
+		priv = mon_get_kn_priv(r->rid, domid, mevt, !hdr);
+		if (WARN_ON_ONCE(!priv)) {
+			ret = -EINVAL;
+			goto out_destroy;
+		}
 
 		ret = mon_addfile(kn, mevt->name, priv);
 		if (ret)
-			return ret;
+			goto out_destroy;
 
-		if (!do_sum && resctrl_is_mbm_event(mevt->evtid))
-			mon_event_read(&rr, r, d, prgrp, &d->hdr.cpu_mask, mevt->evtid, true);
+		if (hdr && resctrl_is_mbm_event(mevt->evtid))
+			mon_event_read(&rr, r, hdr, prgrp, &hdr->cpu_mask, mevt, true);
 	}
 
-	return 0;
+	return kn;
+out_destroy:
+	kernfs_remove(kn);
+	return ERR_PTR(ret);
 }
 
-static int mkdir_mondata_subdir(struct kernfs_node *parent_kn,
-				struct rdt_mon_domain *d,
-				struct rdt_resource *r, struct rdtgroup *prgrp)
+static int mkdir_mondata_subdir_snc(struct kernfs_node *parent_kn,
+				    struct rdt_domain_hdr *hdr,
+				    struct rdt_resource *r, struct rdtgroup *prgrp)
 {
-	struct kernfs_node *kn, *ckn;
+	struct kernfs_node *ckn, *kn;
+	struct rdt_l3_mon_domain *d;
 	char name[32];
-	bool snc_mode;
-	int ret = 0;
 
-	lockdep_assert_held(&rdtgroup_mutex);
+	if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3))
+		return -EINVAL;
 
-	snc_mode = r->mon_scope == RESCTRL_L3_NODE;
-	sprintf(name, "mon_%s_%02d", r->name, snc_mode ? d->ci_id : d->hdr.id);
+	d = container_of(hdr, struct rdt_l3_mon_domain, hdr);
+	sprintf(name, "mon_%s_%02d", r->name, d->ci_id);
 	kn = kernfs_find_and_get(parent_kn, name);
 	if (kn) {
 		/*
@@ -3298,41 +3351,41 @@ static int mkdir_mondata_subdir(struct kernfs_node *parent_kn,
 		 */
 		kernfs_put(kn);
 	} else {
-		kn = kernfs_create_dir(parent_kn, name, parent_kn->mode, prgrp);
+		kn = _mkdir_mondata_subdir(parent_kn, name, NULL, r, prgrp, d->ci_id);
 		if (IS_ERR(kn))
 			return PTR_ERR(kn);
+	}
 
-		ret = rdtgroup_kn_set_ugid(kn);
-		if (ret)
-			goto out_destroy;
-		ret = mon_add_all_files(kn, d, r, prgrp, snc_mode);
-		if (ret)
-			goto out_destroy;
+	sprintf(name, "mon_sub_%s_%02d", r->name, hdr->id);
+	ckn = _mkdir_mondata_subdir(kn, name, hdr, r, prgrp, hdr->id);
+	if (IS_ERR(ckn)) {
+		kernfs_remove(kn);
+		return PTR_ERR(ckn);
 	}
 
-	if (snc_mode) {
-		sprintf(name, "mon_sub_%s_%02d", r->name, d->hdr.id);
-		ckn = kernfs_create_dir(kn, name, parent_kn->mode, prgrp);
-		if (IS_ERR(ckn)) {
-			ret = -EINVAL;
-			goto out_destroy;
-		}
+	kernfs_activate(kn);
+	return 0;
+}
 
-		ret = rdtgroup_kn_set_ugid(ckn);
-		if (ret)
-			goto out_destroy;
+static int mkdir_mondata_subdir(struct kernfs_node *parent_kn,
+				struct rdt_domain_hdr *hdr,
+				struct rdt_resource *r, struct rdtgroup *prgrp)
+{
+	struct kernfs_node *kn;
+	char name[32];
 
-		ret = mon_add_all_files(ckn, d, r, prgrp, false);
-		if (ret)
-			goto out_destroy;
-	}
+	lockdep_assert_held(&rdtgroup_mutex);
+
+	if (r->rid == RDT_RESOURCE_L3 && r->mon_scope == RESCTRL_L3_NODE)
+		return mkdir_mondata_subdir_snc(parent_kn, hdr, r, prgrp);
+
+	sprintf(name, "mon_%s_%02d", r->name, hdr->id);
+	kn = _mkdir_mondata_subdir(parent_kn, name, hdr, r, prgrp, hdr->id);
+	if (IS_ERR(kn))
+		return PTR_ERR(kn);
 
 	kernfs_activate(kn);
 	return 0;
-
-out_destroy:
-	kernfs_remove(kn);
-	return ret;
 }
 
 /*
@@ -3340,7 +3393,7 @@ out_destroy:
  * and "monitor" groups with given domain id.
  */
 static void mkdir_mondata_subdir_allrdtgrp(struct rdt_resource *r,
-					   struct rdt_mon_domain *d)
+					   struct rdt_domain_hdr *hdr)
 {
 	struct kernfs_node *parent_kn;
 	struct rdtgroup *prgrp, *crgrp;
@@ -3348,12 +3401,12 @@ static void mkdir_mondata_subdir_allrdtgrp(struct rdt_resource *r,
 
 	list_for_each_entry(prgrp, &rdt_all_groups, rdtgroup_list) {
 		parent_kn = prgrp->mon.mon_data_kn;
-		mkdir_mondata_subdir(parent_kn, d, r, prgrp);
+		mkdir_mondata_subdir(parent_kn, hdr, r, prgrp);
 
 		head = &prgrp->mon.crdtgrp_list;
 		list_for_each_entry(crgrp, head, mon.crdtgrp_list) {
 			parent_kn = crgrp->mon.mon_data_kn;
-			mkdir_mondata_subdir(parent_kn, d, r, crgrp);
+			mkdir_mondata_subdir(parent_kn, hdr, r, crgrp);
 		}
 	}
 }
@@ -3362,14 +3415,14 @@ static int mkdir_mondata_subdir_alldom(struct kernfs_node *parent_kn,
 				       struct rdt_resource *r,
 				       struct rdtgroup *prgrp)
 {
-	struct rdt_mon_domain *dom;
+	struct rdt_domain_hdr *hdr;
 	int ret;
 
 	/* Walking r->domains, ensure it can't race with cpuhp */
 	lockdep_assert_cpus_held();
 
-	list_for_each_entry(dom, &r->mon_domains, hdr.list) {
-		ret = mkdir_mondata_subdir(parent_kn, dom, r, prgrp);
+	list_for_each_entry(hdr, &r->mon_domains, list) {
+		ret = mkdir_mondata_subdir(parent_kn, hdr, r, prgrp);
 		if (ret)
 			return ret;
 	}
@@ -4231,7 +4284,7 @@ static void rdtgroup_setup_default(void)
 	mutex_unlock(&rdtgroup_mutex);
 }
 
-static void domain_destroy_mon_state(struct rdt_mon_domain *d)
+static void domain_destroy_l3_mon_state(struct rdt_l3_mon_domain *d)
 {
 	int idx;
 
@@ -4253,8 +4306,10 @@ void resctrl_offline_ctrl_domain(struct rdt_resource *r, struct rdt_ctrl_domain
 	mutex_unlock(&rdtgroup_mutex);
 }
 
-void resctrl_offline_mon_domain(struct rdt_resource *r, struct rdt_mon_domain *d)
+void resctrl_offline_mon_domain(struct rdt_resource *r, struct rdt_domain_hdr *hdr)
 {
+	struct rdt_l3_mon_domain *d;
+
 	mutex_lock(&rdtgroup_mutex);
 
 	/*
@@ -4262,8 +4317,15 @@ void resctrl_offline_mon_domain(struct rdt_resource *r, struct rdt_mon_domain *d
 	 * per domain monitor data directories.
 	 */
 	if (resctrl_mounted && resctrl_arch_mon_capable())
-		rmdir_mondata_subdir_allrdtgrp(r, d);
+		rmdir_mondata_subdir_allrdtgrp(r, hdr);
+
+	if (r->rid != RDT_RESOURCE_L3)
+		goto out_unlock;
 
+	if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3))
+		goto out_unlock;
+
+	d = container_of(hdr, struct rdt_l3_mon_domain, hdr);
 	if (resctrl_is_mbm_enabled())
 		cancel_delayed_work(&d->mbm_over);
 	if (resctrl_is_mon_event_enabled(QOS_L3_OCCUP_EVENT_ID) && has_busy_rmid(d)) {
@@ -4279,13 +4341,13 @@ void resctrl_offline_mon_domain(struct rdt_resource *r, struct rdt_mon_domain *d
 		cancel_delayed_work(&d->cqm_limbo);
 	}
 
-	domain_destroy_mon_state(d);
-
+	domain_destroy_l3_mon_state(d);
+out_unlock:
 	mutex_unlock(&rdtgroup_mutex);
 }
 
 /**
- * domain_setup_mon_state() -  Initialise domain monitoring structures.
+ * domain_setup_l3_mon_state() -  Initialise domain monitoring structures.
  * @r:	The resource for the newly online domain.
  * @d:	The newly online domain.
  *
@@ -4293,11 +4355,17 @@ void resctrl_offline_mon_domain(struct rdt_resource *r, struct rdt_mon_domain *d
  * Called when the first CPU of a domain comes online, regardless of whether
  * the filesystem is mounted.
  * During boot this may be called before global allocations have been made by
- * resctrl_mon_resource_init().
+ * resctrl_l3_mon_resource_init().
+ *
+ * Called during CPU online that may run as soon as CPU online callbacks
+ * are set up during resctrl initialization. The number of supported RMIDs
+ * may be reduced if additional mon_capable resources are enumerated
+ * at mount time. This means the rdt_l3_mon_domain::mbm_states[] and
+ * rdt_l3_mon_domain::rmid_busy_llc allocations may be larger than needed.
  *
- * Returns 0 for success, or -ENOMEM.
+ * Return: 0 for success, or -ENOMEM.
  */
-static int domain_setup_mon_state(struct rdt_resource *r, struct rdt_mon_domain *d)
+static int domain_setup_l3_mon_state(struct rdt_resource *r, struct rdt_l3_mon_domain *d)
 {
 	u32 idx_limit = resctrl_arch_system_num_rmid_idx();
 	size_t tsize = sizeof(*d->mbm_states[0]);
@@ -4353,13 +4421,21 @@ int resctrl_online_ctrl_domain(struct rdt_resource *r, struct rdt_ctrl_domain *d
 	return err;
 }
 
-int resctrl_online_mon_domain(struct rdt_resource *r, struct rdt_mon_domain *d)
+int resctrl_online_mon_domain(struct rdt_resource *r, struct rdt_domain_hdr *hdr)
 {
-	int err;
+	struct rdt_l3_mon_domain *d;
+	int err = -EINVAL;
 
 	mutex_lock(&rdtgroup_mutex);
 
-	err = domain_setup_mon_state(r, d);
+	if (r->rid != RDT_RESOURCE_L3)
+		goto mkdir;
+
+	if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3))
+		goto out_unlock;
+
+	d = container_of(hdr, struct rdt_l3_mon_domain, hdr);
+	err = domain_setup_l3_mon_state(r, d);
 	if (err)
 		goto out_unlock;
 
@@ -4372,6 +4448,8 @@ int resctrl_online_mon_domain(struct rdt_resource *r, struct rdt_mon_domain *d)
 	if (resctrl_is_mon_event_enabled(QOS_L3_OCCUP_EVENT_ID))
 		INIT_DELAYED_WORK(&d->cqm_limbo, cqm_handle_limbo);
 
+mkdir:
+	err = 0;
 	/*
 	 * If the filesystem is not mounted then only the default resource group
 	 * exists. Creation of its directories is deferred until mount time
@@ -4379,7 +4457,7 @@ int resctrl_online_mon_domain(struct rdt_resource *r, struct rdt_mon_domain *d)
 	 * If resctrl is mounted, add per domain monitor data directories.
 	 */
 	if (resctrl_mounted && resctrl_arch_mon_capable())
-		mkdir_mondata_subdir_allrdtgrp(r, d);
+		mkdir_mondata_subdir_allrdtgrp(r, hdr);
 
 out_unlock:
 	mutex_unlock(&rdtgroup_mutex);
@@ -4405,10 +4483,10 @@ static void clear_childcpus(struct rdtgroup *r, unsigned int cpu)
 	}
 }
 
-static struct rdt_mon_domain *get_mon_domain_from_cpu(int cpu,
-						      struct rdt_resource *r)
+static struct rdt_l3_mon_domain *get_mon_domain_from_cpu(int cpu,
+							 struct rdt_resource *r)
 {
-	struct rdt_mon_domain *d;
+	struct rdt_l3_mon_domain *d;
 
 	lockdep_assert_cpus_held();
 
@@ -4424,7 +4502,7 @@ static struct rdt_mon_domain *get_mon_domain_from_cpu(int cpu,
 void resctrl_offline_cpu(unsigned int cpu)
 {
 	struct rdt_resource *l3 = resctrl_arch_get_resource(RDT_RESOURCE_L3);
-	struct rdt_mon_domain *d;
+	struct rdt_l3_mon_domain *d;
 	struct rdtgroup *rdtgrp;
 
 	mutex_lock(&rdtgroup_mutex);
@@ -4476,13 +4554,13 @@ int resctrl_init(void)
 
 	io_alloc_init();
 
-	ret = resctrl_mon_resource_init();
+	ret = resctrl_l3_mon_resource_init();
 	if (ret)
 		return ret;
 
 	ret = sysfs_create_mount_point(fs_kobj, "resctrl");
 	if (ret) {
-		resctrl_mon_resource_exit();
+		resctrl_l3_mon_resource_exit();
 		return ret;
 	}
 
@@ -4517,7 +4595,7 @@ int resctrl_init(void)
 
 cleanup_mountpoint:
 	sysfs_remove_mount_point(fs_kobj, "resctrl");
-	resctrl_mon_resource_exit();
+	resctrl_l3_mon_resource_exit();
 
 	return ret;
 }
@@ -4553,7 +4631,7 @@ static bool resctrl_online_domains_exist(void)
  * When called by the architecture code, all CPUs and resctrl domains must be
  * offline. This ensures the limbo and overflow handlers are not scheduled to
  * run, meaning the data structures they access can be freed by
- * resctrl_mon_resource_exit().
+ * resctrl_l3_mon_resource_exit().
  *
  * After resctrl_exit() returns, the architecture code should return an
  * error from all resctrl_arch_ functions that can do this.
@@ -4580,5 +4658,6 @@ void resctrl_exit(void)
 	 * it can be used to umount resctrl.
 	 */
 
-	resctrl_mon_resource_exit();
+	resctrl_l3_mon_resource_exit();
+	free_rmid_lru_list();
 }
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
index 54701668b3df..006e57fd7ca5 100644
--- a/include/linux/resctrl.h
+++ b/include/linux/resctrl.h
@@ -53,6 +53,7 @@ enum resctrl_res_level {
 	RDT_RESOURCE_L2,
 	RDT_RESOURCE_MBA,
 	RDT_RESOURCE_SMBA,
+	RDT_RESOURCE_PERF_PKG,
 
 	/* Must be the last */
 	RDT_NUM_RESOURCES,
@@ -131,15 +132,24 @@ enum resctrl_domain_type {
  * @list:		all instances of this resource
  * @id:			unique id for this instance
  * @type:		type of this instance
+ * @rid:		resource id for this instance
  * @cpu_mask:		which CPUs share this resource
  */
 struct rdt_domain_hdr {
 	struct list_head		list;
 	int				id;
 	enum resctrl_domain_type	type;
+	enum resctrl_res_level		rid;
 	struct cpumask			cpu_mask;
 };
 
+static inline bool domain_header_is_valid(struct rdt_domain_hdr *hdr,
+					  enum resctrl_domain_type type,
+					  enum resctrl_res_level rid)
+{
+	return !WARN_ON_ONCE(hdr->type != type || hdr->rid != rid);
+}
+
 /**
  * struct rdt_ctrl_domain - group of CPUs sharing a resctrl control resource
  * @hdr:		common header for different domain types
@@ -169,7 +179,7 @@ struct mbm_cntr_cfg {
 };
 
 /**
- * struct rdt_mon_domain - group of CPUs sharing a resctrl monitor resource
+ * struct rdt_l3_mon_domain - group of CPUs sharing RDT_RESOURCE_L3 monitoring
  * @hdr:		common header for different domain types
  * @ci_id:		cache info id for this domain
  * @rmid_busy_llc:	bitmap of which limbo RMIDs are above threshold
@@ -183,7 +193,7 @@ struct mbm_cntr_cfg {
  * @cntr_cfg:		array of assignable counters' configuration (indexed
  *			by counter ID)
  */
-struct rdt_mon_domain {
+struct rdt_l3_mon_domain {
 	struct rdt_domain_hdr		hdr;
 	unsigned int			ci_id;
 	unsigned long			*rmid_busy_llc;
@@ -261,6 +271,7 @@ enum resctrl_scope {
 	RESCTRL_L2_CACHE = 2,
 	RESCTRL_L3_CACHE = 3,
 	RESCTRL_L3_NODE,
+	RESCTRL_PACKAGE,
 };
 
 /**
@@ -284,7 +295,7 @@ enum resctrl_schema_fmt {
  *			events of monitor groups created via mkdir.
  */
 struct resctrl_mon {
-	int			num_rmid;
+	u32			num_rmid;
 	unsigned int		mbm_cfg_mask;
 	int			num_mbm_cntrs;
 	bool			mbm_cntr_assignable;
@@ -358,10 +369,10 @@ struct resctrl_cpu_defaults {
 };
 
 struct resctrl_mon_config_info {
-	struct rdt_resource	*r;
-	struct rdt_mon_domain	*d;
-	u32			evtid;
-	u32			mon_config;
+	struct rdt_resource		*r;
+	struct rdt_l3_mon_domain	*d;
+	u32				evtid;
+	u32				mon_config;
 };
 
 /**
@@ -403,7 +414,8 @@ u32 resctrl_arch_get_num_closid(struct rdt_resource *r);
 u32 resctrl_arch_system_num_rmid_idx(void);
 int resctrl_arch_update_domains(struct rdt_resource *r, u32 closid);
 
-void resctrl_enable_mon_event(enum resctrl_event_id eventid);
+bool resctrl_enable_mon_event(enum resctrl_event_id eventid, bool any_cpu,
+			      unsigned int binary_bits, void *arch_priv);
 
 bool resctrl_is_mon_event_enabled(enum resctrl_event_id eventid);
 
@@ -498,22 +510,31 @@ int resctrl_arch_update_one(struct rdt_resource *r, struct rdt_ctrl_domain *d,
 u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_ctrl_domain *d,
 			    u32 closid, enum resctrl_conf_type type);
 int resctrl_online_ctrl_domain(struct rdt_resource *r, struct rdt_ctrl_domain *d);
-int resctrl_online_mon_domain(struct rdt_resource *r, struct rdt_mon_domain *d);
+int resctrl_online_mon_domain(struct rdt_resource *r, struct rdt_domain_hdr *hdr);
 void resctrl_offline_ctrl_domain(struct rdt_resource *r, struct rdt_ctrl_domain *d);
-void resctrl_offline_mon_domain(struct rdt_resource *r, struct rdt_mon_domain *d);
+void resctrl_offline_mon_domain(struct rdt_resource *r, struct rdt_domain_hdr *hdr);
 void resctrl_online_cpu(unsigned int cpu);
 void resctrl_offline_cpu(unsigned int cpu);
 
+/*
+ * Architecture hook called at beginning of first file system mount attempt.
+ * No locks are held.
+ */
+void resctrl_arch_pre_mount(void);
+
 /**
  * resctrl_arch_rmid_read() - Read the eventid counter corresponding to rmid
  *			      for this resource and domain.
  * @r:			resource that the counter should be read from.
- * @d:			domain that the counter should be read from.
+ * @hdr:		Header of domain that the counter should be read from.
  * @closid:		closid that matches the rmid. Depending on the architecture, the
  *			counter may match traffic of both @closid and @rmid, or @rmid
  *			only.
  * @rmid:		rmid of the counter to read.
  * @eventid:		eventid to read, e.g. L3 occupancy.
+ * @arch_priv:		Architecture private data for this event.
+ *			The @arch_priv provided by the architecture via
+ *			resctrl_enable_mon_event().
  * @val:		result of the counter read in bytes.
  * @arch_mon_ctx:	An architecture specific value from
  *			resctrl_arch_mon_ctx_alloc(), for MPAM this identifies
@@ -529,9 +550,9 @@ void resctrl_offline_cpu(unsigned int cpu);
  * Return:
  * 0 on success, or -EIO, -EINVAL etc on error.
  */
-int resctrl_arch_rmid_read(struct rdt_resource *r, struct rdt_mon_domain *d,
+int resctrl_arch_rmid_read(struct rdt_resource *r, struct rdt_domain_hdr *hdr,
 			   u32 closid, u32 rmid, enum resctrl_event_id eventid,
-			   u64 *val, void *arch_mon_ctx);
+			   void *arch_priv, u64 *val, void *arch_mon_ctx);
 
 /**
  * resctrl_arch_rmid_read_context_check()  - warn about invalid contexts
@@ -576,7 +597,7 @@ struct rdt_domain_hdr *resctrl_find_domain(struct list_head *h, int id,
  *
  * This can be called from any CPU.
  */
-void resctrl_arch_reset_rmid(struct rdt_resource *r, struct rdt_mon_domain *d,
+void resctrl_arch_reset_rmid(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 			     u32 closid, u32 rmid,
 			     enum resctrl_event_id eventid);
 
@@ -589,7 +610,7 @@ void resctrl_arch_reset_rmid(struct rdt_resource *r, struct rdt_mon_domain *d,
  *
  * This can be called from any CPU.
  */
-void resctrl_arch_reset_rmid_all(struct rdt_resource *r, struct rdt_mon_domain *d);
+void resctrl_arch_reset_rmid_all(struct rdt_resource *r, struct rdt_l3_mon_domain *d);
 
 /**
  * resctrl_arch_reset_all_ctrls() - Reset the control for each CLOSID to its
@@ -615,7 +636,7 @@ void resctrl_arch_reset_all_ctrls(struct rdt_resource *r);
  *
  * This can be called from any CPU.
  */
-void resctrl_arch_config_cntr(struct rdt_resource *r, struct rdt_mon_domain *d,
+void resctrl_arch_config_cntr(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 			      enum resctrl_event_id evtid, u32 rmid, u32 closid,
 			      u32 cntr_id, bool assign);
 
@@ -638,7 +659,7 @@ void resctrl_arch_config_cntr(struct rdt_resource *r, struct rdt_mon_domain *d,
  * Return:
  * 0 on success, or -EIO, -EINVAL etc on error.
  */
-int resctrl_arch_cntr_read(struct rdt_resource *r, struct rdt_mon_domain *d,
+int resctrl_arch_cntr_read(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 			   u32 closid, u32 rmid, int cntr_id,
 			   enum resctrl_event_id eventid, u64 *val);
 
@@ -653,7 +674,7 @@ int resctrl_arch_cntr_read(struct rdt_resource *r, struct rdt_mon_domain *d,
  *
  * This can be called from any CPU.
  */
-void resctrl_arch_reset_cntr(struct rdt_resource *r, struct rdt_mon_domain *d,
+void resctrl_arch_reset_cntr(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
 			     u32 closid, u32 rmid, int cntr_id,
 			     enum resctrl_event_id eventid);
 
diff --git a/include/linux/resctrl_types.h b/include/linux/resctrl_types.h
index acfe07860b34..a5f56faa18d2 100644
--- a/include/linux/resctrl_types.h
+++ b/include/linux/resctrl_types.h
@@ -50,6 +50,17 @@ enum resctrl_event_id {
 	QOS_L3_MBM_TOTAL_EVENT_ID	= 0x02,
 	QOS_L3_MBM_LOCAL_EVENT_ID	= 0x03,
 
+	/* Intel Telemetry Events */
+	PMT_EVENT_ENERGY,
+	PMT_EVENT_ACTIVITY,
+	PMT_EVENT_STALLS_LLC_HIT,
+	PMT_EVENT_C1_RES,
+	PMT_EVENT_UNHALTED_CORE_CYCLES,
+	PMT_EVENT_STALLS_LLC_MISS,
+	PMT_EVENT_AUTO_C6_RES,
+	PMT_EVENT_UNHALTED_REF_CYCLES,
+	PMT_EVENT_UOPS_RETIRED,
+
 	/* Must be the last */
 	QOS_NUM_EVENTS,
 };