diff options
| author | Besar Wicaksono <bwicaksono@nvidia.com> | 2022-09-28 19:28:34 -0500 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2022-11-07 14:02:11 +0000 |
| commit | 6251d38059ae22304ede4f3748af9f795bdbf4fd (patch) | |
| tree | 426b5241efa9cda676c0c90c9615bea3776c9ca1 /drivers/acpi/bus.c | |
| parent | f0c4d9fc9cc9462659728d168387191387e903cc (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.c | 2 |
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; } |