On 2022/4/20 4:54, Besar Wicaksono wrote:
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@xxxxxxxxxx> --- arch/arm64/Kconfig | 1 + drivers/acpi/arm64/Kconfig | 3 + drivers/acpi/arm64/Makefile | 1 + drivers/acpi/arm64/apmt.c | 176 ++++++++++++++++++++++++++++++++++++ drivers/acpi/bus.c | 2 + include/linux/acpi_apmt.h | 19 ++++ 6 files changed, 202 insertions(+) create mode 100644 drivers/acpi/arm64/apmt.c create mode 100644 include/linux/acpi_apmt.h +++ b/drivers/acpi/arm64/apmt.c @@ -0,0 +1,176 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ARM APMT table support. + * Design document number: ARM DEN0117. + * + * Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. + * + */ + +#define pr_fmt(fmt) "ACPI: APMT: " fmt + +#include <linux/acpi.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/platform_device.h>
Please include <linux/acpi_apmt.h>, here is the similar patch: https://lore.kernel.org/lkml/CAJZ5v0gqr97AFuk855UZkcVpDnmj1Q6B2PE32zWmx4eKxbNvCw@xxxxxxxxxxxxxx/T/ Thanks Hanjun
