Re: [PATCH 2/2] ACPI: ARM Performance Monitoring Unit Table (APMT) initial support

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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



[Index of Archives]     [ARM Kernel]     [Linux ARM]     [Linux ARM MSM]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux