1 // SPDX-License-Identifier: GPL-2.0-only
29 	gsi = gicc->performance_interrupt;  in arm_pmu_acpi_register_irq()
32 	 * Per the ACPI spec, the MADT cannot describe a PMU that doesn't  in arm_pmu_acpi_register_irq()
41 	if (gicc->flags & ACPI_MADT_PERFORMANCE_IRQ_MODE)  in arm_pmu_acpi_register_irq()
67 	gsi = gicc->performance_interrupt;  in arm_pmu_acpi_unregister_irq()
83 	if (pdev->num_resources != 1)  in arm_acpi_register_pmu_device()
84 		return -ENXIO;  in arm_acpi_register_pmu_device()
86 	if (pdev->resource[0].flags != IORESOURCE_IRQ)  in arm_acpi_register_pmu_device()
87 		return -ENXIO;  in arm_acpi_register_pmu_device()
97 		if (gicc->header.length < len)  in arm_acpi_register_pmu_device()
98 			return gsi ? -ENXIO : 0;  in arm_acpi_register_pmu_device()
106 			pr_warn("ACPI: %s: must be homogeneous\n", pdev->name);  in arm_acpi_register_pmu_device()
107 			return -ENXIO;  in arm_acpi_register_pmu_device()
116 		pr_warn("ACPI: %s Unable to register interrupt: %d\n", pdev->name, gsi);  in arm_acpi_register_pmu_device()
117 		return -ENXIO;  in arm_acpi_register_pmu_device()
120 	pdev->resource[0].start = irq;  in arm_acpi_register_pmu_device()
138 	.id = -1,
145 	return gicc->spe_interrupt;  in arm_spe_parse_gsi()
149  * For lack of a better place, hook the normal PMU MADT walk
150  * and create a SPE device if we detect a recent MADT with
158 		pr_warn("ACPI: SPE: Unable to register device\n");  in arm_spe_acpi_register_device()
176 	.id = -1,
183 	return gicc->trbe_interrupt;  in arm_trbe_parse_gsi()
208 			pr_warn("Unable to parse ACPI PMU IRQ for CPU%d: %d\n",  in arm_pmu_acpi_parse_irqs()
212 			pr_warn("No ACPI PMU IRQ for CPU%d\n", cpu);  in arm_pmu_acpi_parse_irqs()
217 		 * it. We'll have to sanity-check IRQs later when we associate  in arm_pmu_acpi_parse_irqs()
252 	struct arm_pmu *pmu;  in arm_pmu_acpi_find_pmu()  local
256 		pmu = per_cpu(probed_pmus, cpu);  in arm_pmu_acpi_find_pmu()
257 		if (!pmu || pmu->acpi_cpuid != cpuid)  in arm_pmu_acpi_find_pmu()
260 		return pmu;  in arm_pmu_acpi_find_pmu()
268  * the PMU (e.g. we don't have mismatched PPIs).
270 static bool pmu_irq_matches(struct arm_pmu *pmu, int irq)  in pmu_irq_matches()  argument
272 	struct pmu_hw_events __percpu *hw_events = pmu->hw_events;  in pmu_irq_matches()
278 	for_each_cpu(cpu, &pmu->supported_cpus) {  in pmu_irq_matches()
279 		int other_irq = per_cpu(hw_events->irq, cpu);  in pmu_irq_matches()
295 static void arm_pmu_acpi_associate_pmu_cpu(struct arm_pmu *pmu,  in arm_pmu_acpi_associate_pmu_cpu()  argument
300 	per_cpu(probed_pmus, cpu) = pmu;  in arm_pmu_acpi_associate_pmu_cpu()
302 	if (pmu_irq_matches(pmu, irq)) {  in arm_pmu_acpi_associate_pmu_cpu()
304 		hw_events = pmu->hw_events;  in arm_pmu_acpi_associate_pmu_cpu()
305 		per_cpu(hw_events->irq, cpu) = irq;  in arm_pmu_acpi_associate_pmu_cpu()
308 	cpumask_set_cpu(cpu, &pmu->supported_cpus);  in arm_pmu_acpi_associate_pmu_cpu()
322 	struct arm_pmu *pmu;  in arm_pmu_acpi_cpu_starting()  local
328 	pmu = arm_pmu_acpi_find_pmu();  in arm_pmu_acpi_cpu_starting()
329 	if (!pmu) {  in arm_pmu_acpi_cpu_starting()
330 		pr_warn_ratelimited("Unable to associate CPU%d with a PMU\n",  in arm_pmu_acpi_cpu_starting()
335 	arm_pmu_acpi_associate_pmu_cpu(pmu, cpu);  in arm_pmu_acpi_cpu_starting()
339 static void arm_pmu_acpi_probe_matching_cpus(struct arm_pmu *pmu,  in arm_pmu_acpi_probe_matching_cpus()  argument
348 			arm_pmu_acpi_associate_pmu_cpu(pmu, cpu);  in arm_pmu_acpi_probe_matching_cpus()
376 	 * without tying this too deeply into the "real" PMU driver.  in arm_pmu_acpi_probe()
379 	 * of a PMU's CPUs to be online at probe time.  in arm_pmu_acpi_probe()
382 		struct arm_pmu *pmu = per_cpu(probed_pmus, cpu);  in arm_pmu_acpi_probe()  local
387 		if (pmu)  in arm_pmu_acpi_probe()
390 		pmu = armpmu_alloc();  in arm_pmu_acpi_probe()
391 		if (!pmu) {  in arm_pmu_acpi_probe()
392 			pr_warn("Unable to allocate PMU for CPU%d\n",  in arm_pmu_acpi_probe()
394 			return -ENOMEM;  in arm_pmu_acpi_probe()
398 		pmu->acpi_cpuid = cpuid;  in arm_pmu_acpi_probe()
400 		arm_pmu_acpi_probe_matching_cpus(pmu, cpuid);  in arm_pmu_acpi_probe()
402 		ret = init_fn(pmu);  in arm_pmu_acpi_probe()
403 		if (ret == -ENODEV) {  in arm_pmu_acpi_probe()
404 			/* PMU not handled by this driver, or not present */  in arm_pmu_acpi_probe()
407 			pr_warn("Unable to initialise PMU for CPU%d\n", cpu);  in arm_pmu_acpi_probe()
411 		base_name = pmu->name;  in arm_pmu_acpi_probe()
412 		pmu->name = kasprintf(GFP_KERNEL, "%s_%d", base_name, pmu_idx++);  in arm_pmu_acpi_probe()
413 		if (!pmu->name) {  in arm_pmu_acpi_probe()
414 			pr_warn("Unable to allocate PMU name for CPU%d\n", cpu);  in arm_pmu_acpi_probe()
415 			return -ENOMEM;  in arm_pmu_acpi_probe()
418 		ret = armpmu_register(pmu);  in arm_pmu_acpi_probe()
420 			pr_warn("Failed to register PMU for CPU%d\n", cpu);  in arm_pmu_acpi_probe()
421 			kfree(pmu->name);  in arm_pmu_acpi_probe()