1 // SPDX-License-Identifier: GPL-2.0-only
28 	gsi = gicc->performance_interrupt;  in arm_pmu_acpi_register_irq()
31 	 * Per the ACPI spec, the MADT cannot describe a PMU that doesn't  in arm_pmu_acpi_register_irq()
40 	if (gicc->flags & ACPI_MADT_PERFORMANCE_IRQ_MODE)  in arm_pmu_acpi_register_irq()
66 	gsi = gicc->performance_interrupt;  in arm_pmu_acpi_unregister_irq()
81 	.id = -1,
87  * For lack of a better place, hook the normal PMU MADT walk
88  * and create a SPE device if we detect a recent MADT with
99 	 * For now, we only support homogeneous ACPI/SPE machines.  in arm_spe_acpi_register_device()
105 		if (gicc->header.length < ACPI_MADT_GICC_SPE)  in arm_spe_acpi_register_device()
109 			gsi = gicc->spe_interrupt;  in arm_spe_acpi_register_device()
114 		} else if ((gsi != gicc->spe_interrupt) ||  in arm_spe_acpi_register_device()
116 			pr_warn("ACPI: SPE must be homogeneous\n");  in arm_spe_acpi_register_device()
124 		pr_warn("ACPI: SPE Unable to register interrupt: %d\n", gsi);  in arm_spe_acpi_register_device()
131 		pr_warn("ACPI: SPE: Unable to register device\n");  in arm_spe_acpi_register_device()
149 			pr_warn("Unable to parse ACPI PMU IRQ for CPU%d: %d\n",  in arm_pmu_acpi_parse_irqs()
153 			pr_warn("No ACPI PMU IRQ for CPU%d\n", cpu);  in arm_pmu_acpi_parse_irqs()
158 		 * it. We'll have to sanity-check IRQs later when we associate  in arm_pmu_acpi_parse_irqs()
191 	struct arm_pmu *pmu;  in arm_pmu_acpi_find_alloc_pmu()  local
195 		pmu = per_cpu(probed_pmus, cpu);  in arm_pmu_acpi_find_alloc_pmu()
196 		if (!pmu || pmu->acpi_cpuid != cpuid)  in arm_pmu_acpi_find_alloc_pmu()
199 		return pmu;  in arm_pmu_acpi_find_alloc_pmu()
202 	pmu = armpmu_alloc_atomic();  in arm_pmu_acpi_find_alloc_pmu()
203 	if (!pmu) {  in arm_pmu_acpi_find_alloc_pmu()
204 		pr_warn("Unable to allocate PMU for CPU%d\n",  in arm_pmu_acpi_find_alloc_pmu()
209 	pmu->acpi_cpuid = cpuid;  in arm_pmu_acpi_find_alloc_pmu()
211 	return pmu;  in arm_pmu_acpi_find_alloc_pmu()
216  * the PMU (e.g. we don't have mismatched PPIs).
218 static bool pmu_irq_matches(struct arm_pmu *pmu, int irq)  in pmu_irq_matches()  argument
220 	struct pmu_hw_events __percpu *hw_events = pmu->hw_events;  in pmu_irq_matches()
226 	for_each_cpu(cpu, &pmu->supported_cpus) {  in pmu_irq_matches()
227 		int other_irq = per_cpu(hw_events->irq, cpu);  in pmu_irq_matches()
254 	struct arm_pmu *pmu;  in arm_pmu_acpi_cpu_starting()  local
264 	pmu = arm_pmu_acpi_find_alloc_pmu();  in arm_pmu_acpi_cpu_starting()
265 	if (!pmu)  in arm_pmu_acpi_cpu_starting()
266 		return -ENOMEM;  in arm_pmu_acpi_cpu_starting()
268 	per_cpu(probed_pmus, cpu) = pmu;  in arm_pmu_acpi_cpu_starting()
270 	if (pmu_irq_matches(pmu, irq)) {  in arm_pmu_acpi_cpu_starting()
271 		hw_events = pmu->hw_events;  in arm_pmu_acpi_cpu_starting()
272 		per_cpu(hw_events->irq, cpu) = irq;  in arm_pmu_acpi_cpu_starting()
275 	cpumask_set_cpu(cpu, &pmu->supported_cpus);  in arm_pmu_acpi_cpu_starting()
278 	 * Ideally, we'd probe the PMU here when we find the first matching  in arm_pmu_acpi_cpu_starting()
300 	 * without tying this too deeply into the "real" PMU driver.  in arm_pmu_acpi_probe()
303 	 * of a PMU's CPUs to be online at probe time.  in arm_pmu_acpi_probe()
306 		struct arm_pmu *pmu = per_cpu(probed_pmus, cpu);  in arm_pmu_acpi_probe()  local
309 		if (!pmu || pmu->name)  in arm_pmu_acpi_probe()
312 		ret = init_fn(pmu);  in arm_pmu_acpi_probe()
313 		if (ret == -ENODEV) {  in arm_pmu_acpi_probe()
314 			/* PMU not handled by this driver, or not present */  in arm_pmu_acpi_probe()
317 			pr_warn("Unable to initialise PMU for CPU%d\n", cpu);  in arm_pmu_acpi_probe()
321 		base_name = pmu->name;  in arm_pmu_acpi_probe()
322 		pmu->name = kasprintf(GFP_KERNEL, "%s_%d", base_name, pmu_idx++);  in arm_pmu_acpi_probe()
323 		if (!pmu->name) {  in arm_pmu_acpi_probe()
324 			pr_warn("Unable to allocate PMU name for CPU%d\n", cpu);  in arm_pmu_acpi_probe()
325 			return -ENOMEM;  in arm_pmu_acpi_probe()
328 		ret = armpmu_register(pmu);  in arm_pmu_acpi_probe()
330 			pr_warn("Failed to register PMU for CPU%d\n", cpu);  in arm_pmu_acpi_probe()
331 			kfree(pmu->name);  in arm_pmu_acpi_probe()