ACPI: Add CPU hotplug support for processor device objects (9f324bda) · Commits · 戴 / test

drivers/acpi/processor_driver.c

+38 −10

Original line number	Diff line number	Diff line
		@@ -68,6 +68,7 @@
		#define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80
		#define ACPI_PROCESSOR_NOTIFY_POWER 0x81
		#define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82
		#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007"

		#define ACPI_PROCESSOR_LIMIT_USER 0
		#define ACPI_PROCESSOR_LIMIT_THERMAL 1
		@@ -88,7 +89,7 @@ static int acpi_processor_start(struct acpi_processor *pr);

		static const struct acpi_device_id processor_device_ids[] = {
		{ACPI_PROCESSOR_OBJECT_HID, 0},
		{"ACPI0007", 0},
		{ACPI_PROCESSOR_DEVICE_HID, 0},
		{"", 0},
		};
		MODULE_DEVICE_TABLE(acpi, processor_device_ids);
		@@ -741,20 +742,46 @@ static void acpi_processor_hotplug_notify(acpi_handle handle,
		return;
		}

		static acpi_status is_processor_device(acpi_handle handle)
		{
		struct acpi_device_info *info;
		char *hid;
		acpi_status status;

		status = acpi_get_object_info(handle, &info);
		if (ACPI_FAILURE(status))
		return status;

		if (info->type == ACPI_TYPE_PROCESSOR) {
		kfree(info);
		return AE_OK; /* found a processor object */
		}

		if (!(info->valid & ACPI_VALID_HID)) {
		kfree(info);
		return AE_ERROR;
		}

		hid = info->hardware_id.string;
		if ((hid == NULL) \|\| strcmp(hid, ACPI_PROCESSOR_DEVICE_HID)) {
		kfree(info);
		return AE_ERROR;
		}

		kfree(info);
		return AE_OK; /* found a processor device object */
		}

		static acpi_status
		processor_walk_namespace_cb(acpi_handle handle,
		u32 lvl, void context, void *rv)
		{
		acpi_status status;
		int *action = context;
		acpi_object_type type = 0;

		status = acpi_get_type(handle, &type);
		status = is_processor_device(handle);
		if (ACPI_FAILURE(status))
		return (AE_OK);

		if (type != ACPI_TYPE_PROCESSOR)
		return (AE_OK);
		return AE_OK; /* not a processor; continue to walk */

		switch (*action) {
		case INSTALL_NOTIFY_HANDLER:
		@@ -772,7 +799,8 @@ processor_walk_namespace_cb(acpi_handle handle,
		break;
		}

		return (AE_OK);
		/* found a processor; skip walking underneath */
		return AE_CTRL_DEPTH;
		}

		static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr)
		@@ -830,7 +858,7 @@ void acpi_processor_install_hotplug_notify(void)
		{
		#ifdef CONFIG_ACPI_HOTPLUG_CPU
		int action = INSTALL_NOTIFY_HANDLER;
		acpi_walk_namespace(ACPI_TYPE_PROCESSOR,
		acpi_walk_namespace(ACPI_TYPE_ANY,
		ACPI_ROOT_OBJECT,
		ACPI_UINT32_MAX,
		processor_walk_namespace_cb, NULL, &action, NULL);
		@@ -843,7 +871,7 @@ void acpi_processor_uninstall_hotplug_notify(void)
		{
		#ifdef CONFIG_ACPI_HOTPLUG_CPU
		int action = UNINSTALL_NOTIFY_HANDLER;
		acpi_walk_namespace(ACPI_TYPE_PROCESSOR,
		acpi_walk_namespace(ACPI_TYPE_ANY,
		ACPI_ROOT_OBJECT,
		ACPI_UINT32_MAX,
		processor_walk_namespace_cb, NULL, &action, NULL);

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