From: Sudeep Holla <sudeep.holla@arm.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>, linux-acpi@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org,
x86@kernel.org, Al Stone <al.stone@linaro.org>,
Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
Mahesh Sivasubramanian <msivasub@codeaurora.org>,
Ashwin Chaugule <ashwin.chaugule@linaro.org>,
Prashanth Prakash <pprakash@codeaurora.org>,
Sudeep Holla <sudeep.holla@arm.com>
Subject: [UPDATE] [PATCH v3 1/5] ACPI / processor : add support for ACPI0010 processor container
Date: Wed, 17 Feb 2016 11:54:19 +0000 [thread overview]
Message-ID: <1455710059-14380-1-git-send-email-sudeep.holla@arm.com> (raw)
In-Reply-To: <1449065446-26115-2-git-send-email-sudeep.holla@arm.com>
ACPI 6.0 adds support for optional processor container device which may
contain child objects that are either processor devices or other processor
containers. This allows representing hierarchical processor topologies.
It is declared using the _HID of ACPI0010. It is an abstract container
used to represent CPU topology and should not be used to hotplug
purposes.
If no matching handler is found for a device in acpi_scan_attach_handler,
acpi_bus_attach does a default enumeration for those devices with valid
HID in the acpi namespace. This patch adds a scan handler for these ACPI
processor containers to avoid default that enumeration and ensures the
platform devices are not created for them.
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
drivers/acpi/acpi_processor.c | 17 +++++++++++++++++
include/acpi/processor.h | 1 +
2 files changed, 18 insertions(+)
Update:
- No change in the patch, just updated commit log
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index 6979186dbd4b..b5e54f2da53d 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -514,7 +514,24 @@ static struct acpi_scan_handler processor_handler = {
},
};
+static int acpi_processor_container_attach(struct acpi_device *dev,
+ const struct acpi_device_id *id)
+{
+ return 1;
+}
+
+static const struct acpi_device_id processor_container_ids[] = {
+ { ACPI_PROCESSOR_CONTAINER_HID, },
+ { }
+};
+
+static struct acpi_scan_handler processor_container_handler = {
+ .ids = processor_container_ids,
+ .attach = acpi_processor_container_attach,
+};
+
void __init acpi_processor_init(void)
{
acpi_scan_add_handler_with_hotplug(&processor_handler, "processor");
+ acpi_scan_add_handler(&processor_container_handler);
}
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 07fb100bcc68..54d7860cac11 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -9,6 +9,7 @@
#define ACPI_PROCESSOR_CLASS "processor"
#define ACPI_PROCESSOR_DEVICE_NAME "Processor"
#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007"
+#define ACPI_PROCESSOR_CONTAINER_HID "ACPI0010"
#define ACPI_PROCESSOR_BUSY_METRIC 10
--
1.9.1
next prev parent reply other threads:[~2016-02-17 11:55 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-02 14:10 [PATCH v3 0/5] ACPI / processor_idle: Add ACPI v6.0 LPI support Sudeep Holla
2015-12-02 14:10 ` [PATCH v3 1/5] ACPI / processor : add support for ACPI0010 processor container Sudeep Holla
2016-02-16 20:10 ` Rafael J. Wysocki
2016-02-17 11:54 ` Sudeep Holla
2016-02-17 11:54 ` Sudeep Holla [this message]
2016-02-23 23:41 ` [UPDATE] " Rafael J. Wysocki
2015-12-02 14:10 ` [PATCH v3 2/5] ACPI / sleep: move acpi_processor_sleep to sleep.c Sudeep Holla
2016-02-16 20:13 ` Rafael J. Wysocki
2016-02-17 12:03 ` Sudeep Holla
2016-02-17 12:03 ` [UPDATE] " Sudeep Holla
2016-02-23 23:42 ` Rafael J. Wysocki
2015-12-02 14:10 ` [PATCH v3 3/5] ACPI / processor_idle: replace PREFIX with pr_fmt Sudeep Holla
2016-02-16 20:15 ` Rafael J. Wysocki
2015-12-02 14:10 ` [PATCH v3 4/5] ACPI / processor_idle : introduce ARCH_SUPPORTS_ACPI_PROCESSOR_CSTATE Sudeep Holla
2016-02-16 20:18 ` Rafael J. Wysocki
2016-02-17 12:21 ` Sudeep Holla
2016-02-22 13:46 ` Sudeep Holla
2016-02-22 23:28 ` Rafael J. Wysocki
2016-02-23 9:32 ` Sudeep Holla
2015-12-02 14:10 ` [PATCH v3 5/5] ACPI / processor_idle: Add support for Low Power Idle(LPI) states Sudeep Holla
2016-02-16 20:46 ` Rafael J. Wysocki
2016-02-17 16:10 ` Sudeep Holla
2016-04-12 4:06 ` Vikas Sajjan
2016-04-12 14:29 ` Sudeep Holla
2015-12-09 22:52 ` [PATCH v3 0/5] ACPI / processor_idle: Add ACPI v6.0 LPI support Prakash, Prashanth
2015-12-10 8:48 ` Sudeep Holla
2016-01-15 19:13 ` Prakash, Prashanth
2016-01-18 12:15 ` Sudeep Holla
2016-01-18 14:53 ` Rafael J. Wysocki
2016-01-27 18:26 ` Sudeep Holla
2016-02-16 20:08 ` Rafael J. Wysocki
2016-02-17 11:37 ` Sudeep Holla
2016-02-18 2:08 ` Rafael J. Wysocki
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