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Venkatesh Pallipadi 991528d734 ACPI: Processor native C-states using MWAIT 
Intel processors starting with the Core Duo support
support processor native C-state using the MWAIT instruction.
Refer: Intel Architecture Software Developer's Manual
http://www.intel.com/design/Pentium4/manuals/253668.htm

Platform firmware exports the support for Native C-state to OS using
ACPI _PDC and _CST methods.
Refer: Intel Processor Vendor-Specific ACPI: Interface Specification
http://www.intel.com/technology/iapc/acpi/downloads/302223.htm

With Processor Native C-state, we use 'MWAIT' instruction on the processor
to enter different C-states (C1, C2, C3).  We won't use the special IO
ports to enter C-state and no SMM mode etc required to enter C-state.
Overall this will mean better C-state support.

One major advantage of using MWAIT for all C-states is, with this and
"treat interrupt as break event" feature of MWAIT, we can now get accurate
timing for the time spent in C1, C2, ..  states.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-10-14 00:35:39 -04:00
..
acorn IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
acpi ACPI: Processor native C-states using MWAIT 2006-10-14 00:35:39 -04:00
amba [PATCH] 64bit resource: fix up printks for resources in misc drivers 2006-06-27 09:23:59 -07:00
ata Merge branch 'master' into upstream-fixes 2006-10-11 04:59:46 -04:00
atm Various drivers' irq handlers: kill dead code, needless casts 2006-10-06 15:00:58 -04:00
base [PATCH] hot-add-mem x86_64: use CONFIG_MEMORY_HOTPLUG_SPARSE 2006-10-01 00:39:18 -07:00
block [PATCH] z2_init() in non-modular case 2006-10-11 11:17:07 -07:00
bluetooth IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
cdrom [PATCH] cdrom: add endianness annotations 2006-10-10 16:15:33 -07:00
char Include proper header file for PFN_DOWN() 2006-10-13 08:42:10 -07:00
clocksource [PATCH] scx200_hrt: fix precedence bug manifesting as 27x clock in 1 MHz mode 2006-10-04 07:55:14 -07:00
connector [PATCH] Process Events: Fix biarch compatibility issue. use __u64 timestamp 2006-07-31 13:28:36 -07:00
cpufreq [PATCH] cpufreq: make the transition_notifier chain use SRCU 2006-10-04 07:55:30 -07:00
crypto [CRYPTO] padlock: Convert padlock-sha to use crypto_hash 2006-09-21 11:46:22 +10:00
dio
dma [PATCH] drivers/dma trivial annotations 2006-10-10 15:37:21 -07:00
edac [PATCH] drivers/edac/edac_mc.h must #include <linux/platform_device.h> 2006-08-06 08:57:46 -07:00
eisa [PATCH] EISA: handle sysfs errors 2006-10-11 11:14:25 -07:00
fc4 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
firmware [PATCH] firmware/efivars: handle error 2006-10-11 11:14:25 -07:00
hwmon Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
i2c [POWERPC] Fix i2c-powermac platform device usage 2006-10-10 13:56:13 +10:00
ide [PATCH] ide-cd: one more missing REQ_TYPE_CMD_ATA check 2006-10-12 17:24:52 +02:00
ieee1394 Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2006-10-08 12:28:41 -07:00
infiniband IB/mthca: Fix off-by-one in mthca SRQ creation 2006-10-10 12:50:38 -07:00
input [PATCH] Use linux/io.h instead of asm/io.h 2006-10-11 11:14:23 -07:00
isdn [PATCH] ISDN: several minor fixes 2006-10-11 11:14:25 -07:00
leds Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
macintosh [POWERPC] Fix windfarm platform device usage 2006-10-10 13:56:13 +10:00
mca [PATCH] drivers/mca: handle sysfs errors 2006-10-11 11:14:25 -07:00
md [PATCH] md: use BUILD_BUG_ON 2006-10-11 11:14:26 -07:00
media [PATCH] em28xx NULL noise removal 2006-10-10 15:37:23 -07:00
message IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
mfd IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
misc [PATCH] tifm __iomem annotations, NULL noise removal 2006-10-09 14:19:08 -07:00
mmc [PATCH] passing pointer to setup_timer() should be via unsigned long 2006-10-10 15:37:22 -07:00
mtd [PATCH] mtd: remove several bogus casts to void * in iounmap() argument 2006-10-10 15:37:22 -07:00
net Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6 2006-10-11 11:19:30 -07:00
nubus Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
oprofile [PATCH] inode-diet: Eliminate i_blksize from the inode structure 2006-09-27 08:26:18 -07:00
parisc Build fixes for struct pt_regs removal 2006-10-06 20:47:23 -06:00
parport [PATCH] sparc32 pt_regs fixes 2006-10-08 12:32:35 -07:00
pci [PATCH] HT_IRQ must depend on PCI 2006-10-11 11:14:23 -07:00
pcmcia Merge branch 'irqclean-submit1' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-2.6 2006-10-09 14:21:45 -07:00
pnp IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
rapidio Fix several typos in drivers/ 2006-10-03 22:31:37 +02:00
rtc sh: Updates for IRQ handler changes. 2006-10-06 15:31:16 +09:00
s390 [S390] cio: remove casts from/to (void *). 2006-10-11 15:31:47 +02:00
sbus [PATCH] more kernel_execve() fallout (sbus) 2006-10-12 12:36:55 -07:00
scsi [PATCH] Use linux/io.h instead of asm/io.h 2006-10-11 11:14:23 -07:00
serial Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6 2006-10-12 08:33:23 -07:00
sh
sn Various drivers' irq handlers: kill dead code, needless casts 2006-10-06 15:00:58 -04:00
spi Various drivers' irq handlers: kill dead code, needless casts 2006-10-06 15:00:58 -04:00
tc [MIPS] Fix DECserial build error by IRQ hander change 2006-10-08 02:38:28 +01:00
telephony Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/devfs-2.6 2006-06-29 14:19:21 -07:00
usb [PATCH] devio __user annotations 2006-10-10 15:37:21 -07:00
video [PATCH] revert "nvidiafb: use generic ddc reading" 2006-10-11 11:14:14 -07:00
w1 Fix several typos in drivers/ 2006-10-03 22:31:37 +02:00
zorro Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
Kconfig Move libata to drivers/ata. 2006-08-10 07:31:37 -04:00
Makefile Move libata to drivers/ata. 2006-08-10 07:31:37 -04:00