From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org, stable@kernel.org
Cc: Justin Forbes <jmforbes@linuxtx.org>,
Zwane Mwaikambo <zwane@arm.linux.org.uk>,
"Theodore Ts'o" <tytso@mit.edu>,
Randy Dunlap <rdunlap@xenotime.net>,
Dave Jones <davej@redhat.com>,
Chuck Wolber <chuckw@quantumlinux.com>,
Chris Wedgwood <reviews@ml.cw.f00f.org>,
Michael Krufky <mkrufky@linuxtv.org>,
Chuck Ebbert <cebbert@redhat.com>,
Domenico Andreoli <cavokz@gmail.com>, Willy Tarreau <w@1wt.eu>,
Rodrigo Rubira Branco <rbranco@la.checkpoint.com>,
Jake Edge <jake@lwn.net>, Eugene Teo <eteo@redhat.com>,
torvalds@linux-foundation.org, akpm@linux-foundation.org,
alan@lxorguk.ukuu.org.uk,
Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>,
Len Brown <len.brown@intel.com>
Subject: [patch 02/56] ACPI: Enable bit 11 in _PDC to advertise hw coord
Date: Tue, 10 Feb 2009 16:24:13 -0800 [thread overview]
Message-ID: <20090211002413.GC14660@kroah.com> (raw)
In-Reply-To: <20090211002328.GA14660@kroah.com>
[-- Attachment #1: acpi-enable-bit-11-in-_pdc-to-advertise-hw-coord.patch --]
[-- Type: text/plain, Size: 1528 bytes --]
2.6.27-stable review patch. If anyone has any objections, please let us know.
------------------
From: Pallipadi, Venkatesh <venkatesh.pallipadi@intel.com>
commit d96f94c604453f87fe24154b87e1e9a3a72511f8 upstream.
Bit 11 in intel PDC definitions is meant for OS capability to handle
hardware coordination of P-states. In Linux we have always supported
hwardware coordination of P-states. Just let the BIOSes know that we
support it, by setting this bit.
Some BIOSes use this bit to choose between hardware or software coordination
and without this change below, BIOSes switch to software coordination, which
is not very optimal in terms of power consumption and extra wakeups from idle.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
include/acpi/pdc_intel.h | 2 ++
1 file changed, 2 insertions(+)
--- a/include/acpi/pdc_intel.h
+++ b/include/acpi/pdc_intel.h
@@ -14,6 +14,7 @@
#define ACPI_PDC_SMP_T_SWCOORD (0x0080)
#define ACPI_PDC_C_C1_FFH (0x0100)
#define ACPI_PDC_C_C2C3_FFH (0x0200)
+#define ACPI_PDC_SMP_P_HWCOORD (0x0800)
#define ACPI_PDC_EST_CAPABILITY_SMP (ACPI_PDC_SMP_C1PT | \
ACPI_PDC_C_C1_HALT | \
@@ -22,6 +23,7 @@
#define ACPI_PDC_EST_CAPABILITY_SWSMP (ACPI_PDC_SMP_C1PT | \
ACPI_PDC_C_C1_HALT | \
ACPI_PDC_SMP_P_SWCOORD | \
+ ACPI_PDC_SMP_P_HWCOORD | \
ACPI_PDC_P_FFH)
#define ACPI_PDC_C_CAPABILITY_SMP (ACPI_PDC_SMP_C2C3 | \
next prev parent reply other threads:[~2009-02-11 0:28 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20090211001439.873435357@mini.kroah.org>
2009-02-11 0:23 ` [patch 00/56] 2.6.27-stable review Greg KH
2009-02-11 0:24 ` [patch 01/56] ACPI: dock: Dont eval _STA on every show_docked sysfs read Greg KH
2009-02-11 0:24 ` Greg KH [this message]
2009-02-11 0:24 ` [patch 03/56] agp/intel: add support for G41 chipset Greg KH
2009-02-11 0:24 ` [patch 04/56] agp/intel: Fix broken ® symbol in device name Greg KH
2009-02-11 0:24 ` [patch 05/56] agp/intel: Reduce extraneous PCI posting reads during init Greg KH
2009-02-11 2:13 ` Keith Packard
2009-02-11 2:40 ` Greg KH
2009-02-11 0:24 ` [patch 06/56] e1000: fix bug with shared interrupt during reset Greg KH
2009-02-11 0:24 ` [patch 07/56] e1000: Fix PCI enable to honor the need_ioport flag Greg KH
2009-02-11 0:24 ` [patch 08/56] eeepc-laptop: fix oops when changing backlight brightness during eeepc-laptop init Greg KH
2009-02-11 0:24 ` [patch 09/56] md: Ensure an md array never has too many devices Greg KH
2009-02-11 0:24 ` [patch 10/56] module: remove over-zealous check in __module_get() Greg KH
2009-02-11 0:24 ` [patch 11/56] prevent kprobes from catching spurious page faults Greg KH
2009-02-11 0:24 ` [patch 12/56] sgi-xp: fix writing past the end of kzalloc()d space Greg KH
2009-02-11 0:24 ` [patch 13/56] shm: fix shmctl(SHM_INFO) lockup with !CONFIG_SHMEM Greg KH
2009-02-11 0:24 ` [patch 14/56] sound: usb-audio: handle wMaxPacketSize for FIXED_ENDPOINT devices Greg KH
2009-02-11 0:24 ` [patch 15/56] wait: prevent exclusive waiter starvation Greg KH
2009-02-11 0:24 ` [patch 16/56] x86: APIC: enable workaround on AMD Fam10h CPUs Greg KH
2009-02-11 0:24 ` [patch 17/56] ieee1394: ohci1394: increase AT req. retries, fix ack_busy_X from Panasonic camcorders and others Greg KH
2009-02-11 0:24 ` [patch 18/56] firewire: ohci: " Greg KH
2009-02-11 0:24 ` [patch 19/56] firewire: sbp2: fix DMA mapping leak on the failure path Greg KH
2009-02-11 0:24 ` [patch 20/56] firewire: sbp2: add workarounds for 2nd and 3rd generation iPods Greg KH
2009-02-11 0:24 ` [patch 21/56] ieee1394: " Greg KH
2009-02-11 0:25 ` [patch 22/56] 8250_pci: add support for netmos 9835 IBM devices Greg KH
2009-02-11 0:25 ` [patch 23/56] ACPICA: Fix table entry truncation calculation Greg KH
2009-02-11 0:25 ` [patch 24/56] ACPI: disable ACPI cleanly when bad RSDP found Greg KH
2009-02-11 0:25 ` [patch 25/56] ACPI: proc_dir_entry video/VGA already registered Greg KH
2009-02-11 0:25 ` [patch 26/56] ACPI: Skip the first two elements in the _BCL package Greg KH
2009-02-11 0:25 ` [patch 27/56] Add support for 8-port RS-232 MIC-3620 from advantech Greg KH
2009-02-11 0:25 ` [patch 28/56] ALSA: hda - Add missing COEF initialization for ALC887 Greg KH
2009-02-11 0:25 ` [patch 29/56] ALSA: hda - Add missing initialization for ALC272 Greg KH
2009-02-11 0:25 ` [patch 30/56] ALSA: hda - Add quirk for FSC Amilo Xi2550 Greg KH
2009-02-11 0:25 ` [patch 31/56] PCI: properly clean up ASPM link state on device remove Greg KH
2009-02-11 0:25 ` [patch 32/56] PCI: return error on failure to read PCI ROMs Greg KH
2009-02-11 0:25 ` [patch 33/56] seq_file: move traverse so it can be used from seq_read Greg KH
2009-02-11 0:25 ` [patch 34/56] seq_file: fix big-enough lseek() + read() Greg KH
2009-02-11 0:25 ` [patch 35/56] serial: set correct baud_base for Oxford Semiconductor Ltd EXSYS EX-41092 Dual 16950 Serial adapter Greg KH
2009-02-11 0:25 ` [patch 36/56] elf core dump: fix get_user use Greg KH
2009-02-11 0:25 ` [patch 37/56] XFS: set b_error from bio error in xfs_buf_bio_end_io Greg KH
2009-02-11 0:25 ` [patch 38/56] Add a reference to sunrpc in svc_addsock Greg KH
2009-02-11 0:25 ` [patch 39/56] mm: remove UP version of lru_add_drain_all() Greg KH
2009-02-11 0:25 ` [patch 40/56] Revert "vt: fix background color on line feed" Greg KH
2009-02-11 0:25 ` [patch 41/56] md: Dont try to set an array to read-auto if it is already in that state Greg KH
2009-02-11 0:25 ` [patch 42/56] md: Allow metadata_version to be updated for externally managed metadata Greg KH
2009-02-11 0:25 ` [patch 43/56] ipw2200: fix scanning while associated Greg KH
2009-02-11 0:25 ` [patch 44/56] hso: rfkill type should be WWAN Greg KH
2009-02-11 0:25 ` [patch 45/56] dm mpath: avoid attempting to activate null path Greg KH
2009-02-11 0:25 ` [patch 46/56] ACPICA: Copy dynamically loaded tables to local buffer Greg KH
2009-02-11 0:25 ` [patch 47/56] ACPICA: Add function to dereference returned reference objects Greg KH
2009-02-11 0:25 ` [patch 48/56] ACPI: dont load acpi_cpufreq if acpi=off Greg KH
2009-02-11 0:25 ` [patch 49/56] ACPI: video: Fix reversed brightness behavior on ThinkPad SL series Greg KH
2009-02-11 0:25 ` [patch 50/56] Revert USB: option: add Pantech cards Greg KH
2009-02-11 0:25 ` [patch 51/56] USB: new id for ti_usb_3410_5052 driver Greg KH
2009-02-11 0:26 ` [patch 52/56] USB: option: New mobile broadband modems to be supported Greg KH
2009-02-11 0:26 ` [patch 53/56] USB: two more usb ids for ti_usb_3410_5052 Greg KH
2009-02-11 0:26 ` [patch 54/56] USB: usb-storage: add Pentax to the bad-vendor list Greg KH
2009-02-11 0:26 ` [patch 55/56] sctp: Fix another socket race during accept/peeloff Greg KH
2009-02-11 0:26 ` [patch 56/56] genirq: NULL struct irq_descs member name in dynamic_irq_cleanup() Greg KH
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