drivers/perf/arm_spe_pmu.c

3  * Perf support for the Statistical Profiling Extension, introduced as
568 	/* Disable profiling at EL0 and EL1 */  in arm_spe_pmu_disable_and_drain_local()
576 	/* Disable the profiling buffer */  in arm_spe_pmu_disable_and_drain_local()
590 	 * Ensure new profiling data is visible to the CPU and any external  in arm_spe_pmu_buf_get_fault_act()
605 	 * If we've lost data, disable profiling and also set the PARTIAL  in arm_spe_pmu_buf_get_fault_act()
666 	 * profiling buffer in response to a TRUNCATION flag.  in arm_spe_pmu_irq_handler()
673 		 * If a fatal exception occurred then leaving the profiling  in arm_spe_pmu_irq_handler()
676 		 * that the profiling buffer is disabled explicitly before  in arm_spe_pmu_irq_handler()
684 		 * profiling as long as we didn't detect truncation.  in arm_spe_pmu_irq_handler()
698 	/* The buffer pointers are now sane, so resume profiling. */  in arm_spe_pmu_irq_handler()
960 		 * we can support per-task profiling (which is not possible  in arm_spe_pmu_perf_init()
964 		 * a subsequent mmap, or creates the profiling event in a  in arm_spe_pmu_perf_init()
1015 			"profiling buffer owned by higher exception level\n");  in __arm_spe_pmu_dev_probe()
1229 	{ .compatible = "arm,statistical-profiling-extension-v1", .data = (void *)1 },
1251 …dev_warn_once(dev, "profiling buffer inaccessible. Try passing \"kpti=off\" on the kernel command …  in arm_spe_pmu_device_probe()
1335 MODULE_DESCRIPTION("Perf driver for the ARMv8.2 Statistical Profiling Extension");