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authorBesar Wicaksono <bwicaksono@nvidia.com>2022-09-28 19:28:34 -0500
committerWill Deacon <will@kernel.org>2022-11-07 14:02:11 +0000
commit6251d38059ae22304ede4f3748af9f795bdbf4fd (patch)
tree426b5241efa9cda676c0c90c9615bea3776c9ca1 /drivers/acpi/bus.c
parentf0c4d9fc9cc9462659728d168387191387e903cc (diff)
ACPI: ARM Performance Monitoring Unit Table (APMT) initial support
ARM Performance Monitoring Unit Table describes the properties of PMU support in ARM-based system. The APMT table contains a list of nodes, each represents a PMU in the system that conforms to ARM CoreSight PMU architecture. The properties of each node include information required to access the PMU (e.g. MMIO base address, interrupt number) and also identification. For more detailed information, please refer to the specification below: * APMT: https://developer.arm.com/documentation/den0117/latest * ARM Coresight PMU: https://developer.arm.com/documentation/ihi0091/latest The initial support adds the detection of APMT table and generic infrastructure to create platform devices for ARM CoreSight PMUs. Similar to IORT the root pointer of APMT is preserved during runtime and each PMU platform device is given a pointer to the corresponding APMT node. Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Link: https://lore.kernel.org/r/20220929002834.32664-1-bwicaksono@nvidia.com Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/acpi/bus.c')
-rw-r--r--drivers/acpi/bus.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index d466c8195314..351208eda9be 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -27,6 +27,7 @@
#include <linux/dmi.h>
#endif
#include <linux/acpi_agdi.h>
+#include <linux/acpi_apmt.h>
#include <linux/acpi_iort.h>
#include <linux/acpi_viot.h>
#include <linux/pci.h>
@@ -1423,6 +1424,7 @@ static int __init acpi_init(void)
acpi_setup_sb_notify_handler();
acpi_viot_init();
acpi_agdi_init();
+ acpi_apmt_init();
return 0;
}