diff --git a/Documentation/admin-guide/pm/intel_uncore_frequency_scaling.rst b/Documentation/admin-guide/pm/intel_uncore_frequency_scaling.rst
index 5ab3440e6cee0..4a36763cd1f3f 100644
--- a/Documentation/admin-guide/pm/intel_uncore_frequency_scaling.rst
+++ b/Documentation/admin-guide/pm/intel_uncore_frequency_scaling.rst
@@ -91,12 +91,22 @@ Attributes in each directory:
 ``domain_id``
 	This attribute is used to get the power domain id of this instance.
 
+``die_id``
+	This attribute is used to get the Linux die id of this instance.
+	This attribute is only present for domains with core agents and
+	when the CPUID leaf 0x1f presents die ID.
+
 ``fabric_cluster_id``
 	This attribute is used to get the fabric cluster id of this instance.
 
 ``package_id``
 	This attribute is used to get the package id of this instance.
 
+``agent_types``
+	This attribute displays all the hardware agents present within the
+	domain. Each agent has the capability to control one or more hardware
+	subsystems, which include: core, cache, memory, and I/O.
+
 The other attributes are same as presented at package_*_die_* level.
 
 In most of current use cases, the "max_freq_khz" and "min_freq_khz"
diff --git a/config.x86_64 b/config.x86_64
index 6cd53619fa6c9..4c60c0e8e0e05 100644
--- a/config.x86_64
+++ b/config.x86_64
@@ -8196,6 +8196,7 @@ CONFIG_INTEL_OAKTRAIL=m
 CONFIG_INTEL_RST=m
 CONFIG_INTEL_SMARTCONNECT=m
 CONFIG_INTEL_TPMI=m
+CONFIG_INTEL_PLR_TPMI=m
 # CONFIG_INTEL_TURBO_MAX_3 is not set
 CONFIG_INTEL_VSEC=m
 # CONFIG_MSI_EC is not set
diff --git a/drivers/platform/x86/intel/Kconfig b/drivers/platform/x86/intel/Kconfig
index e9dc0c0210299..ad50bbabec615 100644
--- a/drivers/platform/x86/intel/Kconfig
+++ b/drivers/platform/x86/intel/Kconfig
@@ -192,10 +192,14 @@ config INTEL_SMARTCONNECT
 	  This driver checks to determine whether the device has Intel Smart
 	  Connect enabled, and if so disables it.
 
+config INTEL_TPMI_POWER_DOMAINS
+	tristate
+
 config INTEL_TPMI
 	tristate "Intel Topology Aware Register and PM Capsule Interface (TPMI)"
 	depends on INTEL_VSEC
 	depends on X86_64
+	select INTEL_TPMI_POWER_DOMAINS
 	help
 	  The Intel Topology Aware Register and PM Capsule Interface (TPMI),
 	  provides enumerable MMIO interface for power management features.
@@ -205,6 +209,13 @@ config INTEL_TPMI
 	  To compile this driver as a module, choose M here: the module will
 	  be called intel_vsec_tpmi.
 
+config INTEL_PLR_TPMI
+        tristate "Intel SoC TPMI Power Limit Reasons driver"
+        depends on INTEL_TPMI
+        help
+          This driver provides the TPMI power limit reasons status information
+          via debugfs files.
+
 config INTEL_TURBO_MAX_3
 	bool "Intel Turbo Boost Max Technology 3.0 enumeration driver"
 	depends on X86_64 && SCHED_MC_PRIO
diff --git a/drivers/platform/x86/intel/Makefile b/drivers/platform/x86/intel/Makefile
index c1d5fe05e3f30..74db065c82d61 100644
--- a/drivers/platform/x86/intel/Makefile
+++ b/drivers/platform/x86/intel/Makefile
@@ -52,6 +52,10 @@ obj-$(CONFIG_INTEL_PUNIT_IPC)		+= intel_punit_ipc.o
 # TPMI drivers
 intel_vsec_tpmi-y			:= tpmi.o
 obj-$(CONFIG_INTEL_TPMI)		+= intel_vsec_tpmi.o
+obj-$(CONFIG_INTEL_PLR_TPMI)		+= intel_plr_tpmi.o
+
+intel_tpmi_power_domains-y		:= tpmi_power_domains.o
+obj-$(CONFIG_INTEL_TPMI_POWER_DOMAINS)	+= intel_tpmi_power_domains.o
 
 # Intel Uncore drivers
 intel-rst-y				:= rst.o
diff --git a/drivers/platform/x86/intel/intel_plr_tpmi.c b/drivers/platform/x86/intel/intel_plr_tpmi.c
new file mode 100644
index 0000000000000..69ace6a629bc7
--- /dev/null
+++ b/drivers/platform/x86/intel/intel_plr_tpmi.c
@@ -0,0 +1,354 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Performance Limit Reasons via TPMI
+ *
+ * Copyright (c) 2024, Intel Corporation.
+ */
+
+#include <linux/array_size.h>
+#include <linux/auxiliary_bus.h>
+#include <linux/bitfield.h>
+#include <linux/bitmap.h>
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gfp_types.h>
+#include <linux/intel_tpmi.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/kstrtox.h>
+#include <linux/lockdep.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/mutex.h>
+#include <linux/seq_file.h>
+#include <linux/sprintf.h>
+#include <linux/types.h>
+
+#include "tpmi_power_domains.h"
+
+#define PLR_HEADER		0x00
+#define PLR_MAILBOX_INTERFACE	0x08
+#define PLR_MAILBOX_DATA	0x10
+#define PLR_DIE_LEVEL		0x18
+
+#define PLR_MODULE_ID_MASK	GENMASK_ULL(19, 12)
+#define PLR_RUN_BUSY		BIT_ULL(63)
+
+#define PLR_COMMAND_WRITE	1
+
+#define PLR_INVALID		GENMASK_ULL(63, 0)
+
+#define PLR_TIMEOUT_US		5
+#define PLR_TIMEOUT_MAX_US	1000
+
+#define PLR_COARSE_REASON_BITS	32
+
+struct tpmi_plr;
+
+struct tpmi_plr_die {
+	void __iomem *base;
+	struct mutex lock; /* Protect access to PLR mailbox */
+	int package_id;
+	int die_id;
+	struct tpmi_plr *plr;
+};
+
+struct tpmi_plr {
+	struct dentry *dbgfs_dir;
+	struct tpmi_plr_die *die_info;
+	int num_dies;
+	struct auxiliary_device *auxdev;
+};
+
+static const char * const plr_coarse_reasons[] = {
+	"FREQUENCY",
+	"CURRENT",
+	"POWER",
+	"THERMAL",
+	"PLATFORM",
+	"MCP",
+	"RAS",
+	"MISC",
+	"QOS",
+	"DFC",
+};
+
+static const char * const plr_fine_reasons[] = {
+	"FREQUENCY_CDYN0",
+	"FREQUENCY_CDYN1",
+	"FREQUENCY_CDYN2",
+	"FREQUENCY_CDYN3",
+	"FREQUENCY_CDYN4",
+	"FREQUENCY_CDYN5",
+	"FREQUENCY_FCT",
+	"FREQUENCY_PCS_TRL",
+	"CURRENT_MTPMAX",
+	"POWER_FAST_RAPL",
+	"POWER_PKG_PL1_MSR_TPMI",
+	"POWER_PKG_PL1_MMIO",
+	"POWER_PKG_PL1_PCS",
+	"POWER_PKG_PL2_MSR_TPMI",
+	"POWER_PKG_PL2_MMIO",
+	"POWER_PKG_PL2_PCS",
+	"POWER_PLATFORM_PL1_MSR_TPMI",
+	"POWER_PLATFORM_PL1_MMIO",
+	"POWER_PLATFORM_PL1_PCS",
+	"POWER_PLATFORM_PL2_MSR_TPMI",
+	"POWER_PLATFORM_PL2_MMIO",
+	"POWER_PLATFORM_PL2_PCS",
+	"UNKNOWN(22)",
+	"THERMAL_PER_CORE",
+	"DFC_UFS",
+	"PLATFORM_PROCHOT",
+	"PLATFORM_HOT_VR",
+	"UNKNOWN(27)",
+	"UNKNOWN(28)",
+	"MISC_PCS_PSTATE",
+};
+
+static u64 plr_read(struct tpmi_plr_die *plr_die, int offset)
+{
+	return readq(plr_die->base + offset);
+}
+
+static void plr_write(u64 val, struct tpmi_plr_die *plr_die, int offset)
+{
+	writeq(val, plr_die->base + offset);
+}
+
+static int plr_read_cpu_status(struct tpmi_plr_die *plr_die, int cpu,
+			       u64 *status)
+{
+	u64 regval;
+	int ret;
+
+	lockdep_assert_held(&plr_die->lock);
+
+	regval = FIELD_PREP(PLR_MODULE_ID_MASK, tpmi_get_punit_core_number(cpu));
+	regval |= PLR_RUN_BUSY;
+
+	plr_write(regval, plr_die, PLR_MAILBOX_INTERFACE);
+
+	ret = readq_poll_timeout(plr_die->base + PLR_MAILBOX_INTERFACE, regval,
+				 !(regval & PLR_RUN_BUSY), PLR_TIMEOUT_US,
+				 PLR_TIMEOUT_MAX_US);
+	if (ret)
+		return ret;
+
+	*status = plr_read(plr_die, PLR_MAILBOX_DATA);
+
+	return 0;
+}
+
+static int plr_clear_cpu_status(struct tpmi_plr_die *plr_die, int cpu)
+{
+	u64 regval;
+
+	lockdep_assert_held(&plr_die->lock);
+
+	regval = FIELD_PREP(PLR_MODULE_ID_MASK, tpmi_get_punit_core_number(cpu));
+	regval |= PLR_RUN_BUSY | PLR_COMMAND_WRITE;
+
+	plr_write(0, plr_die, PLR_MAILBOX_DATA);
+
+	plr_write(regval, plr_die, PLR_MAILBOX_INTERFACE);
+
+	return readq_poll_timeout(plr_die->base + PLR_MAILBOX_INTERFACE, regval,
+				  !(regval & PLR_RUN_BUSY), PLR_TIMEOUT_US,
+				  PLR_TIMEOUT_MAX_US);
+}
+
+static void plr_print_bits(struct seq_file *s, u64 val, int bits)
+{
+	const unsigned long mask[] = { BITMAP_FROM_U64(val) };
+	int bit, index;
+
+	for_each_set_bit(bit, mask, bits) {
+		const char *str = NULL;
+
+		if (bit < PLR_COARSE_REASON_BITS) {
+			if (bit < ARRAY_SIZE(plr_coarse_reasons))
+				str = plr_coarse_reasons[bit];
+		} else {
+			index = bit - PLR_COARSE_REASON_BITS;
+			if (index < ARRAY_SIZE(plr_fine_reasons))
+				str = plr_fine_reasons[index];
+		}
+
+		if (str)
+			seq_printf(s, " %s", str);
+		else
+			seq_printf(s, " UNKNOWN(%d)", bit);
+	}
+
+	if (!val)
+		seq_puts(s, " none");
+
+	seq_putc(s, '\n');
+}
+
+static int plr_status_show(struct seq_file *s, void *unused)
+{
+	struct tpmi_plr_die *plr_die = s->private;
+	int ret;
+	u64 val;
+
+	val = plr_read(plr_die, PLR_DIE_LEVEL);
+	seq_puts(s, "cpus");
+	plr_print_bits(s, val, 32);
+
+	guard(mutex)(&plr_die->lock);
+
+	for (int cpu = 0; cpu < nr_cpu_ids; cpu++) {
+		if (plr_die->die_id != tpmi_get_power_domain_id(cpu))
+			continue;
+
+		if (plr_die->package_id != topology_physical_package_id(cpu))
+			continue;
+
+		seq_printf(s, "cpu%d", cpu);
+		ret = plr_read_cpu_status(plr_die, cpu, &val);
+		if (ret) {
+			dev_err(&plr_die->plr->auxdev->dev, "Failed to read PLR for cpu %d, ret=%d\n",
+				cpu, ret);
+			return ret;
+		}
+
+		plr_print_bits(s, val, 64);
+	}
+
+	return 0;
+}
+
+static ssize_t plr_status_write(struct file *filp, const char __user *ubuf,
+				size_t count, loff_t *ppos)
+{
+	struct seq_file *s = filp->private_data;
+	struct tpmi_plr_die *plr_die = s->private;
+	bool val;
+	int ret;
+
+	ret = kstrtobool_from_user(ubuf, count, &val);
+	if (ret)
+		return ret;
+
+	if (val != 0)
+		return -EINVAL;
+
+	plr_write(0, plr_die, PLR_DIE_LEVEL);
+
+	guard(mutex)(&plr_die->lock);
+
+	for (int cpu = 0; cpu < nr_cpu_ids; cpu++) {
+		if (plr_die->die_id != tpmi_get_power_domain_id(cpu))
+			continue;
+
+		if (plr_die->package_id != topology_physical_package_id(cpu))
+			continue;
+
+		plr_clear_cpu_status(plr_die, cpu);
+	}
+
+	return count;
+}
+DEFINE_SHOW_STORE_ATTRIBUTE(plr_status);
+
+static int intel_plr_probe(struct auxiliary_device *auxdev, const struct auxiliary_device_id *id)
+{
+	struct intel_tpmi_plat_info *plat_info;
+	struct dentry *dentry;
+	int i, num_resources;
+	struct resource *res;
+	struct tpmi_plr *plr;
+	void __iomem *base;
+	char name[16];
+	int err;
+
+	plat_info = tpmi_get_platform_data(auxdev);
+	if (!plat_info)
+		return dev_err_probe(&auxdev->dev, -EINVAL, "No platform info\n");
+
+	dentry = tpmi_get_debugfs_dir(auxdev);
+	if (!dentry)
+		return dev_err_probe(&auxdev->dev, -ENODEV, "No TPMI debugfs directory.\n");
+
+	num_resources = tpmi_get_resource_count(auxdev);
+	if (!num_resources)
+		return -EINVAL;
+
+	plr = devm_kzalloc(&auxdev->dev, sizeof(*plr), GFP_KERNEL);
+	if (!plr)
+		return -ENOMEM;
+
+	plr->die_info = devm_kcalloc(&auxdev->dev, num_resources, sizeof(*plr->die_info),
+				     GFP_KERNEL);
+	if (!plr->die_info)
+		return -ENOMEM;
+
+	plr->num_dies = num_resources;
+	plr->dbgfs_dir = debugfs_create_dir("plr", dentry);
+	plr->auxdev = auxdev;
+
+	for (i = 0; i < num_resources; i++) {
+		res = tpmi_get_resource_at_index(auxdev, i);
+		if (!res) {
+			err = dev_err_probe(&auxdev->dev, -EINVAL, "No resource\n");
+			goto err;
+		}
+
+		base = devm_ioremap_resource(&auxdev->dev, res);
+		if (IS_ERR(base)) {
+			err = PTR_ERR(base);
+			goto err;
+		}
+
+		plr->die_info[i].base = base;
+		plr->die_info[i].package_id = plat_info->package_id;
+		plr->die_info[i].die_id = i;
+		plr->die_info[i].plr = plr;
+		mutex_init(&plr->die_info[i].lock);
+
+		if (plr_read(&plr->die_info[i], PLR_HEADER) == PLR_INVALID)
+			continue;
+
+		snprintf(name, sizeof(name), "domain%d", i);
+
+		dentry = debugfs_create_dir(name, plr->dbgfs_dir);
+		debugfs_create_file("status", 0444, dentry, &plr->die_info[i],
+				    &plr_status_fops);
+	}
+
+	auxiliary_set_drvdata(auxdev, plr);
+
+	return 0;
+
+err:
+	debugfs_remove_recursive(plr->dbgfs_dir);
+	return err;
+}
+
+static void intel_plr_remove(struct auxiliary_device *auxdev)
+{
+	struct tpmi_plr *plr = auxiliary_get_drvdata(auxdev);
+
+	debugfs_remove_recursive(plr->dbgfs_dir);
+}
+
+static const struct auxiliary_device_id intel_plr_id_table[] = {
+	{ .name = "intel_vsec.tpmi-plr" },
+	{}
+};
+MODULE_DEVICE_TABLE(auxiliary, intel_plr_id_table);
+
+static struct auxiliary_driver intel_plr_aux_driver = {
+	.id_table       = intel_plr_id_table,
+	.remove         = intel_plr_remove,
+	.probe          = intel_plr_probe,
+};
+module_auxiliary_driver(intel_plr_aux_driver);
+
+MODULE_IMPORT_NS(INTEL_TPMI);
+MODULE_IMPORT_NS(INTEL_TPMI_POWER_DOMAIN);
+MODULE_DESCRIPTION("Intel TPMI PLR Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/platform/x86/intel/tpmi.c b/drivers/platform/x86/intel/tpmi.c
index 060f9b86bc030..a3430abeb9869 100644
--- a/drivers/platform/x86/intel/tpmi.c
+++ b/drivers/platform/x86/intel/tpmi.c
@@ -357,6 +357,15 @@ int tpmi_get_feature_status(struct auxiliary_device *auxdev,
 }
 EXPORT_SYMBOL_NS_GPL(tpmi_get_feature_status, INTEL_TPMI);
 
+struct dentry *tpmi_get_debugfs_dir(struct auxiliary_device *auxdev)
+{
+	struct intel_vsec_device *intel_vsec_dev = dev_to_ivdev(auxdev->dev.parent);
+	struct intel_tpmi_info *tpmi_info = auxiliary_get_drvdata(&intel_vsec_dev->auxdev);
+
+	return tpmi_info->dbgfs_dir;
+}
+EXPORT_SYMBOL_NS_GPL(tpmi_get_debugfs_dir, INTEL_TPMI);
+
 static int tpmi_pfs_dbg_show(struct seq_file *s, void *unused)
 {
 	struct intel_tpmi_info *tpmi_info = s->private;
@@ -576,6 +585,8 @@ static const char *intel_tpmi_name(enum intel_tpmi_id id)
 		return "uncore";
 	case TPMI_ID_SST:
 		return "sst";
+	case TPMI_ID_PLR:
+		return "plr";
 	default:
 		return NULL;
 	}
diff --git a/drivers/platform/x86/intel/tpmi_power_domains.c b/drivers/platform/x86/intel/tpmi_power_domains.c
new file mode 100644
index 0000000000000..1fc15a58657fd
--- /dev/null
+++ b/drivers/platform/x86/intel/tpmi_power_domains.c
@@ -0,0 +1,264 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Mapping of TPMI power domains CPU mapping
+ *
+ * Copyright (c) 2024, Intel Corporation.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/cleanup.h>
+#include <linux/cpuhotplug.h>
+#include <linux/cpumask.h>
+#include <linux/errno.h>
+#include <linux/export.h>
+#include <linux/hashtable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/overflow.h>
+#include <linux/slab.h>
+#include <linux/topology.h>
+#include <linux/types.h>
+
+#include <asm/cpu_device_id.h>
+#include <asm/intel-family.h>
+#include <asm/msr.h>
+
+#include "tpmi_power_domains.h"
+
+#define MSR_PM_LOGICAL_ID       0x54
+
+/*
+ * Struct of MSR 0x54
+ * [15:11] PM_DOMAIN_ID
+ * [10:3] MODULE_ID (aka IDI_AGENT_ID)
+ * [2:0] LP_ID
+ * For Atom:
+ *   [2] Always 0
+ *   [1:0] core ID within module
+ * For Core
+ *   [2:1] Always 0
+ *   [0] thread ID
+ */
+
+#define LP_ID_MASK		GENMASK_ULL(2, 0)
+#define MODULE_ID_MASK		GENMASK_ULL(10, 3)
+#define PM_DOMAIN_ID_MASK	GENMASK_ULL(15, 11)
+
+/**
+ * struct tpmi_cpu_info - Mapping information for a CPU
+ * @hnode: Used to add mapping information to hash list
+ * @linux_cpu:	Linux CPU number
+ * @pkg_id: Package ID of this CPU
+ * @punit_thread_id: Punit thread id of this CPU
+ * @punit_core_id: Punit core id
+ * @punit_domain_id: Power domain id from Punit
+ *
+ * Structure to store mapping information for a Linux CPU
+ * to a Punit core, thread and power domain.
+ */
+struct tpmi_cpu_info {
+	struct hlist_node hnode;
+	int linux_cpu;
+	u8 pkg_id;
+	u8 punit_thread_id;
+	u8 punit_core_id;
+	u8 punit_domain_id;
+};
+
+static DEFINE_PER_CPU(struct tpmi_cpu_info, tpmi_cpu_info);
+
+/* The dynamically assigned cpu hotplug state to free later */
+static enum cpuhp_state tpmi_hp_state __read_mostly;
+
+#define MAX_POWER_DOMAINS	8
+
+static cpumask_t *tpmi_power_domain_mask;
+
+static u16 *domain_die_map;
+
+/* Lock to protect tpmi_power_domain_mask and tpmi_cpu_hash */
+static DEFINE_MUTEX(tpmi_lock);
+
+static const struct x86_cpu_id tpmi_cpu_ids[] = {
+	X86_MATCH_VFM(INTEL_GRANITERAPIDS_X,	NULL),
+	X86_MATCH_VFM(INTEL_ATOM_CRESTMONT_X,	NULL),
+	X86_MATCH_VFM(INTEL_ATOM_CRESTMONT,	NULL),
+	X86_MATCH_VFM(INTEL_ATOM_DARKMONT_X,	NULL),
+	X86_MATCH_VFM(INTEL_GRANITERAPIDS_D,	NULL),
+	{}
+};
+MODULE_DEVICE_TABLE(x86cpu, tpmi_cpu_ids);
+
+static DECLARE_HASHTABLE(tpmi_cpu_hash, 8);
+
+static bool tpmi_domain_is_valid(struct tpmi_cpu_info *info)
+{
+	return info->pkg_id < topology_max_packages() &&
+		info->punit_domain_id < MAX_POWER_DOMAINS;
+}
+
+int tpmi_get_linux_cpu_number(int package_id, int domain_id, int punit_core_id)
+{
+	struct tpmi_cpu_info *info;
+	int ret = -EINVAL;
+
+	guard(mutex)(&tpmi_lock);
+	hash_for_each_possible(tpmi_cpu_hash, info, hnode, punit_core_id) {
+		if (info->punit_domain_id == domain_id && info->pkg_id == package_id) {
+			ret = info->linux_cpu;
+			break;
+		}
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_NS_GPL(tpmi_get_linux_cpu_number, INTEL_TPMI_POWER_DOMAIN);
+
+int tpmi_get_punit_core_number(int cpu_no)
+{
+	if (cpu_no >= num_possible_cpus())
+		return -EINVAL;
+
+	return per_cpu(tpmi_cpu_info, cpu_no).punit_core_id;
+}
+EXPORT_SYMBOL_NS_GPL(tpmi_get_punit_core_number, INTEL_TPMI_POWER_DOMAIN);
+
+int tpmi_get_power_domain_id(int cpu_no)
+{
+	if (cpu_no >= num_possible_cpus())
+		return -EINVAL;
+
+	return per_cpu(tpmi_cpu_info, cpu_no).punit_domain_id;
+}
+EXPORT_SYMBOL_NS_GPL(tpmi_get_power_domain_id, INTEL_TPMI_POWER_DOMAIN);
+
+cpumask_t *tpmi_get_power_domain_mask(int cpu_no)
+{
+	struct tpmi_cpu_info *info;
+	cpumask_t *mask;
+	int index;
+
+	if (cpu_no >= num_possible_cpus())
+		return NULL;
+
+	info = &per_cpu(tpmi_cpu_info, cpu_no);
+	if (!tpmi_domain_is_valid(info))
+		return NULL;
+
+	index = info->pkg_id * MAX_POWER_DOMAINS + info->punit_domain_id;
+	guard(mutex)(&tpmi_lock);
+	mask = &tpmi_power_domain_mask[index];
+
+	return mask;
+}
+EXPORT_SYMBOL_NS_GPL(tpmi_get_power_domain_mask, INTEL_TPMI_POWER_DOMAIN);
+
+int tpmi_get_linux_die_id(int pkg_id, int domain_id)
+{
+	if (pkg_id >= topology_max_packages() || domain_id >= MAX_POWER_DOMAINS)
+		return -EINVAL;
+
+	return domain_die_map[pkg_id * MAX_POWER_DOMAINS + domain_id];
+}
+EXPORT_SYMBOL_NS_GPL(tpmi_get_linux_die_id, INTEL_TPMI_POWER_DOMAIN);
+
+static int tpmi_get_logical_id(unsigned int cpu, struct tpmi_cpu_info *info)
+{
+	u64 data;
+	int ret;
+
+	ret = rdmsrl_safe(MSR_PM_LOGICAL_ID, &data);
+	if (ret)
+		return ret;
+
+	info->punit_domain_id = FIELD_GET(PM_DOMAIN_ID_MASK, data);
+	if (info->punit_domain_id >= MAX_POWER_DOMAINS)
+		return -EINVAL;
+
+	info->punit_thread_id = FIELD_GET(LP_ID_MASK, data);
+	info->punit_core_id = FIELD_GET(MODULE_ID_MASK, data);
+	info->pkg_id = topology_logical_package_id(cpu);
+	info->linux_cpu = cpu;
+
+	return 0;
+}
+
+static int tpmi_cpu_online(unsigned int cpu)
+{
+	struct tpmi_cpu_info *info = &per_cpu(tpmi_cpu_info, cpu);
+	int ret, index;
+
+	/* Don't fail CPU online for some bad mapping of CPUs */
+	ret = tpmi_get_logical_id(cpu, info);
+	if (ret)
+		return 0;
+
+	index = info->pkg_id * MAX_POWER_DOMAINS + info->punit_domain_id;
+
+	guard(mutex)(&tpmi_lock);
+	cpumask_set_cpu(cpu, &tpmi_power_domain_mask[index]);
+	hash_add(tpmi_cpu_hash, &info->hnode, info->punit_core_id);
+
+	domain_die_map[info->pkg_id * MAX_POWER_DOMAINS + info->punit_domain_id] =
+			topology_die_id(cpu);
+
+	return 0;
+}
+
+static int __init tpmi_init(void)
+{
+	const struct x86_cpu_id *id;
+	u64 data;
+	int ret;
+
+	id = x86_match_cpu(tpmi_cpu_ids);
+	if (!id)
+		return -ENODEV;
+
+	/* Check for MSR 0x54 presence */
+	ret = rdmsrl_safe(MSR_PM_LOGICAL_ID, &data);
+	if (ret)
+		return ret;
+
+	tpmi_power_domain_mask = kcalloc(size_mul(topology_max_packages(), MAX_POWER_DOMAINS),
+					 sizeof(*tpmi_power_domain_mask), GFP_KERNEL);
+	if (!tpmi_power_domain_mask)
+		return -ENOMEM;
+
+	domain_die_map = kcalloc(size_mul(topology_max_packages(), MAX_POWER_DOMAINS),
+				 sizeof(*domain_die_map), GFP_KERNEL);
+	if (!domain_die_map) {
+		ret = -ENOMEM;
+		goto free_domain_mask;
+	}
+
+	ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN,
+				"platform/x86/tpmi_power_domains:online",
+				tpmi_cpu_online, NULL);
+	if (ret < 0)
+		goto free_domain_map;
+
+	tpmi_hp_state = ret;
+
+	return 0;
+
+free_domain_map:
+	kfree(domain_die_map);
+
+free_domain_mask:
+	kfree(tpmi_power_domain_mask);
+
+	return ret;
+}
+module_init(tpmi_init)
+
+static void __exit tpmi_exit(void)
+{
+	cpuhp_remove_state(tpmi_hp_state);
+	kfree(tpmi_power_domain_mask);
+	kfree(domain_die_map);
+}
+module_exit(tpmi_exit)
+
+MODULE_DESCRIPTION("TPMI Power Domains Mapping");
+MODULE_LICENSE("GPL");
diff --git a/drivers/platform/x86/intel/tpmi_power_domains.h b/drivers/platform/x86/intel/tpmi_power_domains.h
new file mode 100644
index 0000000000000..2fd0dd7afbd22
--- /dev/null
+++ b/drivers/platform/x86/intel/tpmi_power_domains.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Mapping of TPMI power domain and CPUs
+ *
+ * Copyright (c) 2024, Intel Corporation.
+ */
+
+#ifndef _TPMI_POWER_DOMAINS_H_
+#define _TPMI_POWER_DOMAINS_H_
+
+#include <linux/cpumask.h>
+
+int tpmi_get_linux_cpu_number(int package_id, int die_id, int punit_core_id);
+int tpmi_get_punit_core_number(int cpu_no);
+int tpmi_get_power_domain_id(int cpu_no);
+cpumask_t *tpmi_get_power_domain_mask(int cpu_no);
+int tpmi_get_linux_die_id(int pkg_id, int domain_id);
+
+#endif
diff --git a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.c b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.c
index 4e880585cbe4d..577da9867b213 100644
--- a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.c
+++ b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.c
@@ -43,6 +43,29 @@ static ssize_t show_package_id(struct kobject *kobj, struct kobj_attribute *attr
 	return sprintf(buf, "%u\n", data->package_id);
 }
 
+#define MAX_UNCORE_AGENT_TYPES	4
+
+/* The order follows AGENT_TYPE_* defines */
+static const char *agent_name[MAX_UNCORE_AGENT_TYPES] = {"core", "cache", "memory", "io"};
+
+static ssize_t show_agent_types(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
+{
+	struct uncore_data *data = container_of(attr, struct uncore_data, agent_types_kobj_attr);
+	unsigned long agent_mask = data->agent_type_mask;
+	int agent, length = 0;
+
+	for_each_set_bit(agent, &agent_mask, MAX_UNCORE_AGENT_TYPES) {
+		if (length)
+			length += sysfs_emit_at(buf, length, " ");
+
+		length += sysfs_emit_at(buf, length, "%s", agent_name[agent]);
+	}
+
+	length += sysfs_emit_at(buf, length, "\n");
+
+	return length;
+}
+
 static ssize_t show_attr(struct uncore_data *data, char *buf, enum uncore_index index)
 {
 	unsigned int value;
@@ -60,11 +83,16 @@ static ssize_t show_attr(struct uncore_data *data, char *buf, enum uncore_index
 static ssize_t store_attr(struct uncore_data *data, const char *buf, ssize_t count,
 			  enum uncore_index index)
 {
-	unsigned int input;
+	unsigned int input = 0;
 	int ret;
 
-	if (kstrtouint(buf, 10, &input))
-		return -EINVAL;
+	if (index == UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE) {
+		if (kstrtobool(buf, (bool *)&input))
+			return -EINVAL;
+	} else {
+		if (kstrtouint(buf, 10, &input))
+			return -EINVAL;
+	}
 
 	mutex_lock(&uncore_lock);
 	ret = uncore_write(data, input, index);
@@ -103,6 +131,20 @@ show_uncore_attr(max_freq_khz, UNCORE_INDEX_MAX_FREQ);
 
 show_uncore_attr(current_freq_khz, UNCORE_INDEX_CURRENT_FREQ);
 
+store_uncore_attr(elc_low_threshold_percent, UNCORE_INDEX_EFF_LAT_CTRL_LOW_THRESHOLD);
+store_uncore_attr(elc_high_threshold_percent, UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD);
+store_uncore_attr(elc_high_threshold_enable,
+		  UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE);
+store_uncore_attr(elc_floor_freq_khz, UNCORE_INDEX_EFF_LAT_CTRL_FREQ);
+
+show_uncore_attr(elc_low_threshold_percent, UNCORE_INDEX_EFF_LAT_CTRL_LOW_THRESHOLD);
+show_uncore_attr(elc_high_threshold_percent, UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD);
+show_uncore_attr(elc_high_threshold_enable,
+		 UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE);
+show_uncore_attr(elc_floor_freq_khz, UNCORE_INDEX_EFF_LAT_CTRL_FREQ);
+
+show_uncore_attr(die_id, UNCORE_INDEX_DIE_ID);
+
 #define show_uncore_data(member_name)					\
 	static ssize_t show_##member_name(struct kobject *kobj,	\
 					   struct kobj_attribute *attr, char *buf)\
@@ -146,7 +188,8 @@ show_uncore_data(initial_max_freq_khz);
 
 static int create_attr_group(struct uncore_data *data, char *name)
 {
-	int ret, freq, index = 0;
+	int ret, index = 0;
+	unsigned int val;
 
 	init_attribute_rw(max_freq_khz);
 	init_attribute_rw(min_freq_khz);
@@ -161,6 +204,15 @@ static int create_attr_group(struct uncore_data *data, char *name)
 		data->uncore_attrs[index++] = &data->fabric_cluster_id_kobj_attr.attr;
 		init_attribute_root_ro(package_id);
 		data->uncore_attrs[index++] = &data->package_id_kobj_attr.attr;
+		if (data->agent_type_mask) {
+			init_attribute_ro(agent_types);
+			data->uncore_attrs[index++] = &data->agent_types_kobj_attr.attr;
+		}
+		if (topology_max_die_per_package() > 1 &&
+		    data->agent_type_mask & AGENT_TYPE_CORE) {
+			init_attribute_ro(die_id);
+			data->uncore_attrs[index++] = &data->die_id_kobj_attr.attr;
+		}
 	}
 
 	data->uncore_attrs[index++] = &data->max_freq_khz_kobj_attr.attr;
@@ -168,10 +220,24 @@ static int create_attr_group(struct uncore_data *data, char *name)
 	data->uncore_attrs[index++] = &data->initial_min_freq_khz_kobj_attr.attr;
 	data->uncore_attrs[index++] = &data->initial_max_freq_khz_kobj_attr.attr;
 
-	ret = uncore_read(data, &freq, UNCORE_INDEX_CURRENT_FREQ);
+	ret = uncore_read(data, &val, UNCORE_INDEX_CURRENT_FREQ);
 	if (!ret)
 		data->uncore_attrs[index++] = &data->current_freq_khz_kobj_attr.attr;
 
+	ret = uncore_read(data, &val, UNCORE_INDEX_EFF_LAT_CTRL_LOW_THRESHOLD);
+	if (!ret) {
+		init_attribute_rw(elc_low_threshold_percent);
+		init_attribute_rw(elc_high_threshold_percent);
+		init_attribute_rw(elc_high_threshold_enable);
+		init_attribute_rw(elc_floor_freq_khz);
+
+		data->uncore_attrs[index++] = &data->elc_low_threshold_percent_kobj_attr.attr;
+		data->uncore_attrs[index++] = &data->elc_high_threshold_percent_kobj_attr.attr;
+		data->uncore_attrs[index++] =
+			&data->elc_high_threshold_enable_kobj_attr.attr;
+		data->uncore_attrs[index++] = &data->elc_floor_freq_khz_kobj_attr.attr;
+	}
+
 	data->uncore_attrs[index] = NULL;
 
 	data->uncore_attr_group.name = name;
diff --git a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.h b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.h
index 4c245b945e4ea..0abe850ef54ea 100644
--- a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.h
+++ b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.h
@@ -11,6 +11,18 @@
 
 #include <linux/device.h>
 
+/*
+ * Define uncore agents, which are under uncore frequency control.
+ * Defined in the same order as specified in the TPMI UFS Specifications.
+ * It is possible that there are common uncore frequency control to more than
+ * one hardware agents. So, these defines are used as a bit mask.
+*/
+
+#define AGENT_TYPE_CORE		0x01
+#define	AGENT_TYPE_CACHE	0x02
+#define	AGENT_TYPE_MEMORY	0x04
+#define	AGENT_TYPE_IO		0x08
+
 /**
  * struct uncore_data - Encapsulate all uncore data
  * @stored_uncore_data: Last user changed MSR 620 value, which will be restored
@@ -25,15 +37,25 @@
  * @cluster_id:		cluster id in a domain
  * @instance_id:	Unique instance id to append to directory name
  * @name:		Sysfs entry name for this instance
+ * @agent_type_mask:	Bit mask of all hardware agents for this domain
  * @uncore_attr_group:	Attribute group storage
  * @max_freq_khz_kobj_attr: Storage for kobject attribute max_freq_khz
- * @mix_freq_khz_kobj_attr: Storage for kobject attribute min_freq_khz
+ * @min_freq_khz_kobj_attr: Storage for kobject attribute min_freq_khz
  * @initial_max_freq_khz_kobj_attr: Storage for kobject attribute initial_max_freq_khz
  * @initial_min_freq_khz_kobj_attr: Storage for kobject attribute initial_min_freq_khz
  * @current_freq_khz_kobj_attr: Storage for kobject attribute current_freq_khz
  * @domain_id_kobj_attr: Storage for kobject attribute domain_id
  * @fabric_cluster_id_kobj_attr: Storage for kobject attribute fabric_cluster_id
  * @package_id_kobj_attr: Storage for kobject attribute package_id
+ * @elc_low_threshold_percent_kobj_attr:
+ *		Storage for kobject attribute elc_low_threshold_percent
+ * @elc_high_threshold_percent_kobj_attr:
+ *		Storage for kobject attribute elc_high_threshold_percent
+ * @elc_high_threshold_enable_kobj_attr:
+ *		Storage for kobject attribute elc_high_threshold_enable
+ * @elc_floor_freq_khz_kobj_attr: Storage for kobject attribute elc_floor_freq_khz
+ * @agent_types_kobj_attr: Storage for kobject attribute agent_type
+ * @die_id_kobj_attr:	Attribute storage for die_id information
  * @uncore_attrs:	Attribute storage for group creation
  *
  * This structure is used to encapsulate all data related to uncore sysfs
@@ -51,6 +73,7 @@ struct uncore_data {
 	int cluster_id;
 	int instance_id;
 	char name[32];
+	u16  agent_type_mask;
 
 	struct attribute_group uncore_attr_group;
 	struct kobj_attribute max_freq_khz_kobj_attr;
@@ -61,7 +84,13 @@ struct uncore_data {
 	struct kobj_attribute domain_id_kobj_attr;
 	struct kobj_attribute fabric_cluster_id_kobj_attr;
 	struct kobj_attribute package_id_kobj_attr;
-	struct attribute *uncore_attrs[9];
+	struct kobj_attribute elc_low_threshold_percent_kobj_attr;
+	struct kobj_attribute elc_high_threshold_percent_kobj_attr;
+	struct kobj_attribute elc_high_threshold_enable_kobj_attr;
+	struct kobj_attribute elc_floor_freq_khz_kobj_attr;
+	struct kobj_attribute agent_types_kobj_attr;
+	struct kobj_attribute die_id_kobj_attr;
+	struct attribute *uncore_attrs[15];
 };
 
 #define UNCORE_DOMAIN_ID_INVALID	-1
@@ -70,6 +99,11 @@ enum uncore_index {
 	UNCORE_INDEX_MIN_FREQ,
 	UNCORE_INDEX_MAX_FREQ,
 	UNCORE_INDEX_CURRENT_FREQ,
+	UNCORE_INDEX_EFF_LAT_CTRL_LOW_THRESHOLD,
+	UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD,
+	UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE,
+	UNCORE_INDEX_EFF_LAT_CTRL_FREQ,
+	UNCORE_INDEX_DIE_ID,
 };
 
 int uncore_freq_common_init(int (*read)(struct uncore_data *data, unsigned int *value,
diff --git a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c
index cd48bd4bf6461..b03dbf5695b0f 100644
--- a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c
+++ b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c
@@ -26,10 +26,12 @@
 #include <linux/module.h>
 #include <linux/intel_tpmi.h>
 
+#include "../tpmi_power_domains.h"
 #include "uncore-frequency-common.h"
 
 #define	UNCORE_MAJOR_VERSION		0
 #define	UNCORE_MINOR_VERSION		2
+#define UNCORE_ELC_SUPPORTED_VERSION	2
 #define UNCORE_HEADER_INDEX		0
 #define UNCORE_FABRIC_CLUSTER_OFFSET	8
 
@@ -46,7 +48,9 @@ struct tpmi_uncore_struct;
 /* Information for each cluster */
 struct tpmi_uncore_cluster_info {
 	bool root_domain;
+	bool elc_supported;
 	u8 __iomem *cluster_base;
+	u16 cdie_id;
 	struct uncore_data uncore_data;
 	struct tpmi_uncore_struct *uncore_root;
 };
@@ -75,6 +79,10 @@ struct tpmi_uncore_struct {
 /* Bit definitions for CONTROL register */
 #define UNCORE_MAX_RATIO_MASK				GENMASK_ULL(14, 8)
 #define UNCORE_MIN_RATIO_MASK				GENMASK_ULL(21, 15)
+#define UNCORE_EFF_LAT_CTRL_RATIO_MASK			GENMASK_ULL(28, 22)
+#define UNCORE_EFF_LAT_CTRL_LOW_THRESHOLD_MASK		GENMASK_ULL(38, 32)
+#define UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE	BIT(39)
+#define UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_MASK		GENMASK_ULL(46, 40)
 
 /* Helper function to read MMIO offset for max/min control frequency */
 static void read_control_freq(struct tpmi_uncore_cluster_info *cluster_info,
@@ -89,6 +97,48 @@ static void read_control_freq(struct tpmi_uncore_cluster_info *cluster_info,
 		*value = FIELD_GET(UNCORE_MIN_RATIO_MASK, control) * UNCORE_FREQ_KHZ_MULTIPLIER;
 }
 
+/* Helper function to read efficiency latency control values over MMIO */
+static int read_eff_lat_ctrl(struct uncore_data *data, unsigned int *val, enum uncore_index index)
+{
+	struct tpmi_uncore_cluster_info *cluster_info;
+	u64 ctrl;
+
+	cluster_info = container_of(data, struct tpmi_uncore_cluster_info, uncore_data);
+	if (cluster_info->root_domain)
+		return -ENODATA;
+
+	if (!cluster_info->elc_supported)
+		return -EOPNOTSUPP;
+
+	ctrl = readq(cluster_info->cluster_base + UNCORE_CONTROL_INDEX);
+
+	switch (index) {
+	case UNCORE_INDEX_EFF_LAT_CTRL_LOW_THRESHOLD:
+		*val = FIELD_GET(UNCORE_EFF_LAT_CTRL_LOW_THRESHOLD_MASK, ctrl);
+		*val *= 100;
+		*val = DIV_ROUND_UP(*val, FIELD_MAX(UNCORE_EFF_LAT_CTRL_LOW_THRESHOLD_MASK));
+		break;
+
+	case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD:
+		*val = FIELD_GET(UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_MASK, ctrl);
+		*val *= 100;
+		*val = DIV_ROUND_UP(*val, FIELD_MAX(UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_MASK));
+		break;
+
+	case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE:
+		*val = FIELD_GET(UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE, ctrl);
+		break;
+	case UNCORE_INDEX_EFF_LAT_CTRL_FREQ:
+		*val = FIELD_GET(UNCORE_EFF_LAT_CTRL_RATIO_MASK, ctrl) * UNCORE_FREQ_KHZ_MULTIPLIER;
+		break;
+
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
 #define UNCORE_MAX_RATIO	FIELD_MAX(UNCORE_MAX_RATIO_MASK)
 
 /* Helper for sysfs read for max/min frequencies. Called under mutex locks */
@@ -137,6 +187,82 @@ static int uncore_read_control_freq(struct uncore_data *data, unsigned int *valu
 	return 0;
 }
 
+/* Helper function for writing efficiency latency control values over MMIO */
+static int write_eff_lat_ctrl(struct uncore_data *data, unsigned int val, enum uncore_index index)
+{
+	struct tpmi_uncore_cluster_info *cluster_info;
+	u64 control;
+
+	cluster_info = container_of(data, struct tpmi_uncore_cluster_info, uncore_data);
+
+	if (cluster_info->root_domain)
+		return -ENODATA;
+
+	if (!cluster_info->elc_supported)
+		return -EOPNOTSUPP;
+
+	switch (index) {
+	case UNCORE_INDEX_EFF_LAT_CTRL_LOW_THRESHOLD:
+		if (val > 100)
+			return -EINVAL;
+		break;
+
+	case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD:
+		if (val > 100)
+			return -EINVAL;
+		break;
+
+	case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE:
+		if (val > 1)
+			return -EINVAL;
+		break;
+
+	case UNCORE_INDEX_EFF_LAT_CTRL_FREQ:
+		val /= UNCORE_FREQ_KHZ_MULTIPLIER;
+		if (val > FIELD_MAX(UNCORE_EFF_LAT_CTRL_RATIO_MASK))
+			return -EINVAL;
+		break;
+
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	control = readq(cluster_info->cluster_base + UNCORE_CONTROL_INDEX);
+
+	switch (index) {
+	case UNCORE_INDEX_EFF_LAT_CTRL_LOW_THRESHOLD:
+		val *= FIELD_MAX(UNCORE_EFF_LAT_CTRL_LOW_THRESHOLD_MASK);
+		val /= 100;
+		control &= ~UNCORE_EFF_LAT_CTRL_LOW_THRESHOLD_MASK;
+		control |= FIELD_PREP(UNCORE_EFF_LAT_CTRL_LOW_THRESHOLD_MASK, val);
+		break;
+
+	case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD:
+		val *= FIELD_MAX(UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_MASK);
+		val /= 100;
+		control &= ~UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_MASK;
+		control |= FIELD_PREP(UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_MASK, val);
+		break;
+
+	case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE:
+		control &= ~UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE;
+		control |= FIELD_PREP(UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE, val);
+		break;
+
+	case UNCORE_INDEX_EFF_LAT_CTRL_FREQ:
+		control &= ~UNCORE_EFF_LAT_CTRL_RATIO_MASK;
+		control |= FIELD_PREP(UNCORE_EFF_LAT_CTRL_RATIO_MASK, val);
+		break;
+
+	default:
+		break;
+	}
+
+	writeq(control, cluster_info->cluster_base + UNCORE_CONTROL_INDEX);
+
+	return 0;
+}
+
 /* Helper function to write MMIO offset for max/min control frequency */
 static void write_control_freq(struct tpmi_uncore_cluster_info *cluster_info, unsigned int input,
 			      unsigned int index)
@@ -156,7 +282,7 @@ static void write_control_freq(struct tpmi_uncore_cluster_info *cluster_info, un
 	writeq(control, (cluster_info->cluster_base + UNCORE_CONTROL_INDEX));
 }
 
-/* Callback for sysfs write for max/min frequencies. Called under mutex locks */
+/* Helper for sysfs write for max/min frequencies. Called under mutex locks */
 static int uncore_write_control_freq(struct uncore_data *data, unsigned int input,
 				     enum uncore_index index)
 {
@@ -223,9 +349,102 @@ static int uncore_read_freq(struct uncore_data *data, unsigned int *freq)
 	return 0;
 }
 
+/*
+ * Agent types as per the TPMI UFS Specification for UFS_STATUS
+ * Agent Type - Core	Bit: 23
+ * Agent Type - Cache	Bit: 24
+ * Agent Type - Memory	Bit: 25
+ * Agent Type - IO	Bit: 26
+ */
+
+#define UNCORE_AGENT_TYPES	GENMASK_ULL(26, 23)
+
+/* Helper function to read agent type over MMIO and set the agent type mask */
+static void uncore_set_agent_type(struct tpmi_uncore_cluster_info *cluster_info)
+{
+	u64 status;
+
+	status = readq((u8 __iomem *)cluster_info->cluster_base + UNCORE_STATUS_INDEX);
+	cluster_info->uncore_data.agent_type_mask = FIELD_GET(UNCORE_AGENT_TYPES, status);
+}
+
+#define MAX_PARTITIONS	2
+
+/* IO domain ID start index for a partition */
+static u8 io_die_start[MAX_PARTITIONS];
+
+/* Next IO domain ID index after the current partition IO die IDs */
+static u8 io_die_index_next;
+
+/* Lock to protect io_die_start, io_die_index_next */
+static DEFINE_MUTEX(domain_lock);
+
+static void set_domain_id(int id,  int num_resources,
+			  struct intel_tpmi_plat_info *plat_info,
+			  struct tpmi_uncore_cluster_info *cluster_info)
+{
+	u8 part_io_index, cdie_range, pkg_io_index, max_dies;
+
+	if (plat_info->partition >= MAX_PARTITIONS) {
+		cluster_info->uncore_data.domain_id = id;
+		return;
+	}
+
+	if (cluster_info->uncore_data.agent_type_mask & AGENT_TYPE_CORE) {
+		cluster_info->uncore_data.domain_id = cluster_info->cdie_id;
+		return;
+	}
+
+	/* Unlikely but cdie_mask may have holes, so take range */
+	cdie_range = fls(plat_info->cdie_mask) - ffs(plat_info->cdie_mask) + 1;
+	max_dies = topology_max_die_per_package();
+
+	/*
+	 * If the CPU doesn't enumerate dies, then use current cdie range
+	 * as the max.
+	 */
+	if (cdie_range > max_dies)
+		max_dies = cdie_range;
+
+	guard(mutex)(&domain_lock);
+
+	if (!io_die_index_next)
+		io_die_index_next = max_dies;
+
+	if (!io_die_start[plat_info->partition]) {
+		io_die_start[plat_info->partition] = io_die_index_next;
+		/*
+		 * number of IO dies = num_resources - cdie_range. Hence
+		 * next partition io_die_index_next is set after IO dies
+		 * in the current partition.
+		 */
+		io_die_index_next += (num_resources - cdie_range);
+	}
+
+	/*
+	 * Index from IO die start within the partition:
+	 * This is the first valid domain after the cdies.
+	 * For example the current resource index 5 and cdies end at
+	 * index 3 (cdie_cnt = 4). Then the IO only index 5 - 4 = 1.
+	 */
+	part_io_index = id - cdie_range;
+
+	/*
+	 * Add to the IO die start index for this partition in this package
+	 * to make unique in the package.
+	 */
+	pkg_io_index = io_die_start[plat_info->partition] + part_io_index;
+
+	/* Assign this to domain ID */
+	cluster_info->uncore_data.domain_id = pkg_io_index;
+}
+
 /* Callback for sysfs read for TPMI uncore values. Called under mutex locks. */
 static int uncore_read(struct uncore_data *data, unsigned int *value, enum uncore_index index)
 {
+	struct tpmi_uncore_cluster_info *cluster_info;
+	int ret;
+
 	switch (index) {
 	case UNCORE_INDEX_MIN_FREQ:
 	case UNCORE_INDEX_MAX_FREQ:
@@ -234,6 +453,43 @@ static int uncore_read(struct uncore_data *data, unsigned int *value, enum uncor
 	case UNCORE_INDEX_CURRENT_FREQ:
 		return uncore_read_freq(data, value);
 
+	case UNCORE_INDEX_EFF_LAT_CTRL_LOW_THRESHOLD:
+	case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD:
+	case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE:
+	case UNCORE_INDEX_EFF_LAT_CTRL_FREQ:
+		return read_eff_lat_ctrl(data, value, index);
+
+	case UNCORE_INDEX_DIE_ID:
+		cluster_info = container_of(data, struct tpmi_uncore_cluster_info, uncore_data);
+		ret = tpmi_get_linux_die_id(cluster_info->uncore_data.package_id,
+					    cluster_info->cdie_id);
+		if (ret < 0)
+			return ret;
+
+		*value = ret;
+		return 0;
+
+	default:
+		break;
+	}
+
+	return -EOPNOTSUPP;
+}
+
+/* Callback for sysfs write for TPMI uncore data. Called under mutex locks. */
+static int uncore_write(struct uncore_data *data, unsigned int value, enum uncore_index index)
+{
+	switch (index) {
+	case UNCORE_INDEX_EFF_LAT_CTRL_LOW_THRESHOLD:
+	case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD:
+	case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE:
+	case UNCORE_INDEX_EFF_LAT_CTRL_FREQ:
+		return write_eff_lat_ctrl(data, value, index);
+
+	case UNCORE_INDEX_MIN_FREQ:
+	case UNCORE_INDEX_MAX_FREQ:
+		return uncore_write_control_freq(data, value, index);
+
 	default:
 		break;
 	}
@@ -262,6 +518,16 @@ static void remove_cluster_entries(struct tpmi_uncore_struct *tpmi_uncore)
 	}
 }
 
+static void set_cdie_id(int domain_id, struct tpmi_uncore_cluster_info *cluster_info,
+		       struct intel_tpmi_plat_info *plat_info)
+{
+
+	cluster_info->cdie_id = domain_id;
+
+	if (plat_info->cdie_mask && cluster_info->uncore_data.agent_type_mask & AGENT_TYPE_CORE)
+		cluster_info->cdie_id = domain_id + ffs(plat_info->cdie_mask) - 1;
+}
+
 #define UNCORE_VERSION_MASK			GENMASK_ULL(7, 0)
 #define UNCORE_LOCAL_FABRIC_CLUSTER_ID_MASK	GENMASK_ULL(15, 8)
 #define UNCORE_CLUSTER_OFF_MASK			GENMASK_ULL(7, 0)
@@ -291,7 +557,7 @@ static int uncore_probe(struct auxiliary_device *auxdev, const struct auxiliary_
 		return -EINVAL;
 
 	/* Register callbacks to uncore core */
-	ret = uncore_freq_common_init(uncore_read, uncore_write_control_freq);
+	ret = uncore_freq_common_init(uncore_read, uncore_write);
 	if (ret)
 		return ret;
 
@@ -404,14 +670,22 @@ static int uncore_probe(struct auxiliary_device *auxdev, const struct auxiliary_
 
 			cluster_info->cluster_base = pd_info->uncore_base + mask;
 
+			uncore_set_agent_type(cluster_info);
+
 			cluster_info->uncore_data.package_id = pkg;
 			/* There are no dies like Cascade Lake */
 			cluster_info->uncore_data.die_id = 0;
-			cluster_info->uncore_data.domain_id = i;
 			cluster_info->uncore_data.cluster_id = j;
 
+			set_cdie_id(i, cluster_info, plat_info);
+
+			set_domain_id(i, num_resources, plat_info, cluster_info);
+
 			cluster_info->uncore_root = tpmi_uncore;
 
+			if (TPMI_MINOR_VERSION(pd_info->ufs_header_ver) >= UNCORE_ELC_SUPPORTED_VERSION)
+				cluster_info->elc_supported = true;
+
 			ret = uncore_freq_add_entry(&cluster_info->uncore_data, 0);
 			if (ret) {
 				cluster_info->cluster_base = NULL;
@@ -430,6 +704,9 @@ static int uncore_probe(struct auxiliary_device *auxdev, const struct auxiliary_
 
 	auxiliary_set_drvdata(auxdev, tpmi_uncore);
 
+	if (topology_max_die_per_package() > 1 || plat_info->partition)
+		return 0;
+
 	tpmi_uncore->root_cluster.root_domain = true;
 	tpmi_uncore->root_cluster.uncore_root = tpmi_uncore;
 
@@ -453,7 +730,9 @@ static void uncore_remove(struct auxiliary_device *auxdev)
 {
 	struct tpmi_uncore_struct *tpmi_uncore = auxiliary_get_drvdata(auxdev);
 
-	uncore_freq_remove_die_entry(&tpmi_uncore->root_cluster.uncore_data);
+	if (tpmi_uncore->root_cluster.root_domain)
+		uncore_freq_remove_die_entry(&tpmi_uncore->root_cluster.uncore_data);
+
 	remove_cluster_entries(tpmi_uncore);
 
 	uncore_freq_common_exit();
@@ -475,5 +754,6 @@ module_auxiliary_driver(intel_uncore_aux_driver);
 
 MODULE_IMPORT_NS(INTEL_TPMI);
 MODULE_IMPORT_NS(INTEL_UNCORE_FREQUENCY);
+MODULE_IMPORT_NS(INTEL_TPMI_POWER_DOMAIN);
 MODULE_DESCRIPTION("Intel TPMI UFS Driver");
 MODULE_LICENSE("GPL");
diff --git a/include/linux/array_size.h b/include/linux/array_size.h
new file mode 100644
index 0000000000000..06d7d83196ca3
--- /dev/null
+++ b/include/linux/array_size.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_ARRAY_SIZE_H
+#define _LINUX_ARRAY_SIZE_H
+
+#include <linux/compiler.h>
+
+/**
+ * ARRAY_SIZE - get the number of elements in array @arr
+ * @arr: array to be sized
+ */
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
+
+#endif  /* _LINUX_ARRAY_SIZE_H */
diff --git a/include/linux/intel_tpmi.h b/include/linux/intel_tpmi.h
index 1e880cb0f4541..ff480b47ae642 100644
--- a/include/linux/intel_tpmi.h
+++ b/include/linux/intel_tpmi.h
@@ -21,6 +21,7 @@ enum intel_tpmi_id {
 	TPMI_ID_PEM = 1,	/* Power and Perf excursion Monitor */
 	TPMI_ID_UNCORE = 2,	/* Uncore Frequency Scaling */
 	TPMI_ID_SST = 5,	/* Speed Select Technology */
+	TPMI_ID_PLR = 0xc,	/* Performance Limit Reasons */
 	TPMI_CONTROL_ID = 0x80,	/* Special ID for getting feature status */
 	TPMI_INFO_ID = 0x81,	/* Special ID for PCI BDF and Package ID information */
 };
@@ -53,4 +54,5 @@ struct resource *tpmi_get_resource_at_index(struct auxiliary_device *auxdev, int
 int tpmi_get_resource_count(struct auxiliary_device *auxdev);
 int tpmi_get_feature_status(struct auxiliary_device *auxdev, int feature_id, bool *read_blocked,
 			    bool *write_blocked);
+struct dentry *tpmi_get_debugfs_dir(struct auxiliary_device *auxdev);
 #endif
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index cee8fe87e9f4f..d9ad21058eed9 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -13,6 +13,7 @@
 
 #include <linux/stdarg.h>
 #include <linux/align.h>
+#include <linux/array_size.h>
 #include <linux/limits.h>
 #include <linux/linkage.h>
 #include <linux/stddef.h>
@@ -50,12 +51,6 @@
 #define READ			0
 #define WRITE			1
 
-/**
- * ARRAY_SIZE - get the number of elements in array @arr
- * @arr: array to be sized
- */
-#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
-
 #define PTR_IF(cond, ptr)	((cond) ? (ptr) : NULL)
 
 #define u64_to_user_ptr(x) (		\
diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
index 386ab580b839b..234bcdb1fba45 100644
--- a/include/linux/seq_file.h
+++ b/include/linux/seq_file.h
@@ -207,6 +207,21 @@ static const struct file_operations __name ## _fops = {			\
 	.release	= single_release,				\
 }
 
+#define DEFINE_SHOW_STORE_ATTRIBUTE(__name)				\
+static int __name ## _open(struct inode *inode, struct file *file)	\
+{									\
+	return single_open(file, __name ## _show, inode->i_private);	\
+}									\
+									\
+static const struct file_operations __name ## _fops = {			\
+	.owner		= THIS_MODULE,					\
+	.open		= __name ## _open,				\
+	.read		= seq_read,					\
+	.write		= __name ## _write,				\
+	.llseek		= seq_lseek,					\
+	.release	= single_release,				\
+}
+
 #define DEFINE_PROC_SHOW_ATTRIBUTE(__name)				\
 static int __name ## _open(struct inode *inode, struct file *file)	\
 {									\
diff --git a/include/linux/string.h b/include/linux/string.h
index 5077776e995e0..ce137830a0b99 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -2,6 +2,7 @@
 #ifndef _LINUX_STRING_H_
 #define _LINUX_STRING_H_
 
+#include <linux/array_size.h>
 #include <linux/compiler.h>	/* for inline */
 #include <linux/types.h>	/* for size_t */
 #include <linux/stddef.h>	/* for NULL */
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index e8a4499155667..357b3a6a3b4c9 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -6,6 +6,7 @@
 
 #include "main.h"
 
+#include <linux/array_size.h>
 #include <linux/atomic.h>
 #include <linux/build_bug.h>
 #include <linux/byteorder/generic.h>
@@ -20,7 +21,6 @@
 #include <linux/init.h>
 #include <linux/ip.h>
 #include <linux/ipv6.h>
-#include <linux/kernel.h>
 #include <linux/kobject.h>
 #include <linux/kref.h>
 #include <linux/list.h>
diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c
index 0c64d81a77617..1f7ed9d4f6fdf 100644
--- a/net/batman-adv/netlink.c
+++ b/net/batman-adv/netlink.c
@@ -7,6 +7,7 @@
 #include "netlink.h"
 #include "main.h"
 
+#include <linux/array_size.h>
 #include <linux/atomic.h>
 #include <linux/bitops.h>
 #include <linux/bug.h>
@@ -20,7 +21,6 @@
 #include <linux/if_ether.h>
 #include <linux/if_vlan.h>
 #include <linux/init.h>
-#include <linux/kernel.h>
 #include <linux/limits.h>
 #include <linux/list.h>
 #include <linux/minmax.h>