diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig
index c436e0d..aa587ed 100644
--- a/drivers/perf/Kconfig
+++ b/drivers/perf/Kconfig
@@ -12,6 +12,10 @@ config ARM_PMU
 	  Say y if you want to use CPU performance monitors on ARM-based
 	  systems.
 
+config ARM_PMU_ACPI
+	depends on ARM_PMU && ACPI
+	def_bool y
+
 config QCOM_L2_PMU
 	bool "Qualcomm Technologies L2-cache PMU"
 	depends on ARCH_QCOM && ARM64 && PERF_EVENTS && ACPI
diff --git a/drivers/perf/Makefile b/drivers/perf/Makefile
index 925cd39..6420bd4 100644
--- a/drivers/perf/Makefile
+++ b/drivers/perf/Makefile
@@ -1,4 +1,5 @@
 obj-$(CONFIG_ARM_PMU) += arm_pmu.o arm_pmu_platform.o
+obj-$(CONFIG_ARM_PMU_ACPI) += arm_pmu_acpi.o
 obj-$(CONFIG_QCOM_L2_PMU)	+= qcom_l2_pmu.o
 obj-$(CONFIG_QCOM_L3_PMU) += qcom_l3_pmu.o
 obj-$(CONFIG_XGENE_PMU) += xgene_pmu.o
diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
index b3bedfa..dc459eb 100644
--- a/drivers/perf/arm_pmu.c
+++ b/drivers/perf/arm_pmu.c
@@ -525,7 +525,7 @@ int perf_num_counters(void)
 }
 EXPORT_SYMBOL_GPL(perf_num_counters);
 
-static void armpmu_free_irq(struct arm_pmu *armpmu, int cpu)
+void armpmu_free_irq(struct arm_pmu *armpmu, int cpu)
 {
 	struct pmu_hw_events __percpu *hw_events = armpmu->hw_events;
 	int irq = per_cpu(hw_events->irq, cpu);
@@ -550,7 +550,7 @@ void armpmu_free_irqs(struct arm_pmu *armpmu)
 		armpmu_free_irq(armpmu, cpu);
 }
 
-static int armpmu_request_irq(struct arm_pmu *armpmu, int cpu)
+int armpmu_request_irq(struct arm_pmu *armpmu, int cpu)
 {
 	int err = 0;
 	struct pmu_hw_events __percpu *hw_events = armpmu->hw_events;
diff --git a/drivers/perf/arm_pmu_acpi.c b/drivers/perf/arm_pmu_acpi.c
new file mode 100644
index 0000000..34c862f
--- /dev/null
+++ b/drivers/perf/arm_pmu_acpi.c
@@ -0,0 +1,256 @@
+/*
+ * ACPI probing code for ARM performance counters.
+ *
+ * Copyright (C) 2017 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/acpi.h>
+#include <linux/cpumask.h>
+#include <linux/init.h>
+#include <linux/percpu.h>
+#include <linux/perf/arm_pmu.h>
+
+#include <asm/cputype.h>
+
+static DEFINE_PER_CPU(struct arm_pmu *, probed_pmus);
+static DEFINE_PER_CPU(int, pmu_irqs);
+
+static int arm_pmu_acpi_register_irq(int cpu)
+{
+	struct acpi_madt_generic_interrupt *gicc;
+	int gsi, trigger;
+
+	gicc = acpi_cpu_get_madt_gicc(cpu);
+	if (WARN_ON(!gicc))
+		return -EINVAL;
+
+	gsi = gicc->performance_interrupt;
+	if (gicc->flags & ACPI_MADT_PERFORMANCE_IRQ_MODE)
+		trigger = ACPI_EDGE_SENSITIVE;
+	else
+		trigger = ACPI_LEVEL_SENSITIVE;
+
+	/*
+	 * Helpfully, the MADT GICC doesn't have a polarity flag for the
+	 * "performance interrupt". Luckily, on compliant GICs the polarity is
+	 * a fixed value in HW (for both SPIs and PPIs) that we cannot change
+	 * from SW.
+	 *
+	 * Here we pass in ACPI_ACTIVE_HIGH to keep the core code happy. This
+	 * may not match the real polarity, but that should not matter.
+	 *
+	 * Other interrupt controllers are not supported with ACPI.
+	 */
+	return acpi_register_gsi(NULL, gsi, trigger, ACPI_ACTIVE_HIGH);
+}
+
+static void arm_pmu_acpi_unregister_irq(int cpu)
+{
+	struct acpi_madt_generic_interrupt *gicc;
+	int gsi;
+
+	gicc = acpi_cpu_get_madt_gicc(cpu);
+	if (!gicc)
+		return;
+
+	gsi = gicc->performance_interrupt;
+	acpi_unregister_gsi(gsi);
+}
+
+static int arm_pmu_acpi_parse_irqs(void)
+{
+	int irq, cpu, irq_cpu, err;
+
+	for_each_possible_cpu(cpu) {
+		irq = arm_pmu_acpi_register_irq(cpu);
+		if (irq < 0) {
+			err = irq;
+			pr_warn("Unable to parse ACPI PMU IRQ for CPU%d: %d\n",
+				cpu, err);
+			goto out_err;
+		} else if (irq == 0) {
+			pr_warn("No ACPI PMU IRQ for CPU%d\n", cpu);
+		}
+
+		per_cpu(pmu_irqs, cpu) = irq;
+	}
+
+	return 0;
+
+out_err:
+	for_each_possible_cpu(cpu) {
+		irq = per_cpu(pmu_irqs, cpu);
+		if (!irq)
+			continue;
+
+		arm_pmu_acpi_unregister_irq(cpu);
+
+		/*
+		 * Blat all copies of the IRQ so that we only unregister the
+		 * corresponding GSI once (e.g. when we have PPIs).
+		 */
+		for_each_possible_cpu(irq_cpu) {
+			if (per_cpu(pmu_irqs, irq_cpu) == irq)
+				per_cpu(pmu_irqs, irq_cpu) = 0;
+		}
+	}
+
+	return err;
+}
+
+static struct arm_pmu *arm_pmu_acpi_find_alloc_pmu(void)
+{
+	unsigned long cpuid = read_cpuid_id();
+	struct arm_pmu *pmu;
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		pmu = per_cpu(probed_pmus, cpu);
+		if (!pmu || pmu->acpi_cpuid != cpuid)
+			continue;
+
+		return pmu;
+	}
+
+	pmu = armpmu_alloc();
+	if (!pmu) {
+		pr_warn("Unable to allocate PMU for CPU%d\n",
+			smp_processor_id());
+		return NULL;
+	}
+
+	pmu->acpi_cpuid = cpuid;
+
+	return pmu;
+}
+
+/*
+ * This must run before the common arm_pmu hotplug logic, so that we can
+ * associate a CPU and its interrupt before the common code tries to manage the
+ * affinity and so on.
+ *
+ * Note that hotplug events are serialized, so we cannot race with another CPU
+ * coming up. The perf core won't open events while a hotplug event is in
+ * progress.
+ */
+static int arm_pmu_acpi_cpu_starting(unsigned int cpu)
+{
+	struct arm_pmu *pmu;
+	struct pmu_hw_events __percpu *hw_events;
+	int irq;
+
+	/* If we've already probed this CPU, we have nothing to do */
+	if (per_cpu(probed_pmus, cpu))
+		return 0;
+
+	irq = per_cpu(pmu_irqs, cpu);
+
+	pmu = arm_pmu_acpi_find_alloc_pmu();
+	if (!pmu)
+		return -ENOMEM;
+
+	cpumask_set_cpu(cpu, &pmu->supported_cpus);
+
+	per_cpu(probed_pmus, cpu) = pmu;
+
+	/*
+	 * Log and request the IRQ so the core arm_pmu code can manage it.  In
+	 * some situations (e.g. mismatched PPIs), we may fail to request the
+	 * IRQ. However, it may be too late for us to do anything about it.
+	 * The common ARM PMU code will log a warning in this case.
+	 */
+	hw_events = pmu->hw_events;
+	per_cpu(hw_events->irq, cpu) = irq;
+	armpmu_request_irq(pmu, cpu);
+
+	/*
+	 * Ideally, we'd probe the PMU here when we find the first matching
+	 * CPU. We can't do that for several reasons; see the comment in
+	 * arm_pmu_acpi_init().
+	 *
+	 * So for the time being, we're done.
+	 */
+	return 0;
+}
+
+int arm_pmu_acpi_probe(armpmu_init_fn init_fn)
+{
+	int pmu_idx = 0;
+	int cpu, ret;
+
+	if (acpi_disabled)
+		return 0;
+
+	/*
+	 * Initialise and register the set of PMUs which we know about right
+	 * now. Ideally we'd do this in arm_pmu_acpi_cpu_starting() so that we
+	 * could handle late hotplug, but this may lead to deadlock since we
+	 * might try to register a hotplug notifier instance from within a
+	 * hotplug notifier.
+	 *
+	 * There's also the problem of having access to the right init_fn,
+	 * without tying this too deeply into the "real" PMU driver.
+	 *
+	 * For the moment, as with the platform/DT case, we need at least one
+	 * of a PMU's CPUs to be online at probe time.
+	 */
+	for_each_possible_cpu(cpu) {
+		struct arm_pmu *pmu = per_cpu(probed_pmus, cpu);
+		char *base_name;
+
+		if (!pmu || pmu->name)
+			continue;
+
+		ret = init_fn(pmu);
+		if (ret == -ENODEV) {
+			/* PMU not handled by this driver, or not present */
+			continue;
+		} else if (ret) {
+			pr_warn("Unable to initialise PMU for CPU%d\n", cpu);
+			return ret;
+		}
+
+		base_name = pmu->name;
+		pmu->name = kasprintf(GFP_KERNEL, "%s_%d", base_name, pmu_idx++);
+		if (!pmu->name) {
+			pr_warn("Unable to allocate PMU name for CPU%d\n", cpu);
+			return -ENOMEM;
+		}
+
+		ret = armpmu_register(pmu);
+		if (ret) {
+			pr_warn("Failed to register PMU for CPU%d\n", cpu);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int arm_pmu_acpi_init(void)
+{
+	int ret;
+
+	if (acpi_disabled)
+		return 0;
+
+	/*
+	 * We can't request IRQs yet, since we don't know the cookie value
+	 * until we know which CPUs share the same logical PMU. We'll handle
+	 * that in arm_pmu_acpi_cpu_starting().
+	 */
+	ret = arm_pmu_acpi_parse_irqs();
+	if (ret)
+		return ret;
+
+	ret = cpuhp_setup_state(CPUHP_AP_PERF_ARM_ACPI_STARTING,
+				"perf/arm/pmu_acpi:starting",
+				arm_pmu_acpi_cpu_starting, NULL);
+
+	return ret;
+}
+subsys_initcall(arm_pmu_acpi_init)
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index cfcfab3..0f2a803 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -94,6 +94,7 @@ enum cpuhp_state {
 	CPUHP_AP_ARM_VFP_STARTING,
 	CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING,
 	CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING,
+	CPUHP_AP_PERF_ARM_ACPI_STARTING,
 	CPUHP_AP_PERF_ARM_STARTING,
 	CPUHP_AP_ARM_L2X0_STARTING,
 	CPUHP_AP_ARM_ARCH_TIMER_STARTING,
diff --git a/include/linux/perf/arm_pmu.h b/include/linux/perf/arm_pmu.h
index 25556eb..1360dd6 100644
--- a/include/linux/perf/arm_pmu.h
+++ b/include/linux/perf/arm_pmu.h
@@ -117,6 +117,9 @@ struct arm_pmu {
 	struct notifier_block	cpu_pm_nb;
 	/* the attr_groups array must be NULL-terminated */
 	const struct attribute_group *attr_groups[ARMPMU_NR_ATTR_GROUPS + 1];
+
+	/* Only to be used by ACPI probing code */
+	unsigned long acpi_cpuid;
 };
 
 #define to_arm_pmu(p) (container_of(p, struct arm_pmu, pmu))
@@ -159,12 +162,20 @@ int arm_pmu_device_probe(struct platform_device *pdev,
 			 const struct of_device_id *of_table,
 			 const struct pmu_probe_info *probe_table);
 
+#ifdef CONFIG_ACPI
+int arm_pmu_acpi_probe(armpmu_init_fn init_fn);
+#else
+static inline int arm_pmu_acpi_probe(armpmu_init_fn init_fn) { return 0; }
+#endif
+
 /* Internal functions only for core arm_pmu code */
 struct arm_pmu *armpmu_alloc(void);
 void armpmu_free(struct arm_pmu *pmu);
 int armpmu_register(struct arm_pmu *pmu);
 int armpmu_request_irqs(struct arm_pmu *armpmu);
 void armpmu_free_irqs(struct arm_pmu *armpmu);
+int armpmu_request_irq(struct arm_pmu *armpmu, int cpu);
+void armpmu_free_irq(struct arm_pmu *armpmu, int cpu);
 
 #define ARMV8_PMU_PDEV_NAME "armv8-pmu"
 
