Mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ https://git.shady.money/linux/atom?h=v2.6.20 2006-10-14T04:35:39Z 2006-10-14T04:35:39Z Venkatesh Pallipadi venkatesh.pallipadi@intel.com 2006-09-25T23:28:13Z urn:sha1:991528d7348667924176f3e29addea0675298944 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> 2006-06-28T07:14:31Z Dominik Brodowski linux@dominikbrodowski.net 2006-06-24T23:37:00Z urn:sha1:a3c6598f92cf27d3d201a2a5b052563148156837 Track the actual time spent in C-States (C2 upwards, we can't determine this for C1), not only the number of invocations. This is especially useful for dynamic ticks / "tickless systems", but is also of interest on normal systems, as any interrupt activity leads to C-States being exited, not only the timer interrupt. The time is being measured in PM timer ticks, so an increase by one equals 279 nanoseconds. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Len Brown <len.brown@intel.com> 2006-06-23T14:52:36Z Linus Torvalds torvalds@g5.osdl.org 2006-06-23T14:52:36Z urn:sha1:37224470c8c6d90a4062e76a08d4dc1fcf91fc89 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (65 commits) ACPI: suppress power button event on S3 resume ACPI: resolve merge conflict between sem2mutex and processor_perflib.c ACPI: use for_each_possible_cpu() instead of for_each_cpu() ACPI: delete newly added debugging macros in processor_perflib.c ACPI: UP build fix for bugzilla-5737 Enable P-state software coordination via _PDC P-state software coordination for speedstep-centrino P-state software coordination for acpi-cpufreq P-state software coordination for ACPI core ACPI: create acpi_thermal_resume() ACPI: create acpi_fan_suspend()/acpi_fan_resume() ACPI: pass pm_message_t from acpi_device_suspend() to root_suspend() ACPI: create acpi_device_suspend()/acpi_device_resume() ACPI: replace spin_lock_irq with mutex for ec poll mode ACPI: Allow a WAN module enable/disable on a Thinkpad X60. sem2mutex: acpi, acpi_link_lock ACPI: delete unused acpi_bus_drivers_lock sem2mutex: drivers/acpi/processor_perflib.c ACPI add ia64 exports to build acpi_memhotplug as a module ACPI: asus_acpi_init(): propagate correct return value ... Manual resolve of conflicts in: arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c include/acpi/processor.h 2006-04-26T11:56:16Z David Woodhouse dwmw2@infradead.org 2006-04-26T11:56:16Z urn:sha1:62c4f0a2d5a188f73a94f2cb8ea0dba3e7cf0a7f Signed-off-by: David Woodhouse <dwmw2@infradead.org> 2006-02-09T08:21:48Z Venkatesh Pallipadi venkatesh.pallipadi@intel.com 2005-12-14T20:05:00Z urn:sha1:3b2d99429e3386b6e2ac949fc72486509c8bbe36 http://bugzilla.kernel.org/show_bug.cgi?id=5737 Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> 2006-01-24T22:52:48Z Len Brown len.brown@intel.com 2006-01-24T22:52:48Z urn:sha1:9fdb62af92c741addbea15545f214a6e89460865 Signed-off-by: Len Brown <len.brown@intel.com> 2006-01-08T08:05:59Z Adrian Bunk bunk@stusta.de 2006-01-07T18:19:00Z urn:sha1:757b18661ea0a0d890e8ce7b1a391e5b7d417d78 acpi_processor_write_throttling() acpi_processor_write_limit() Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Len Brown <len.brown@intel.com> 2005-12-01T06:30:35Z Venkatesh Pallipadi venkatesh.pallipadi@intel.com 2005-10-23T20:31:00Z urn:sha1:05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8 Linux invokes the AML _PDC method (Processor Driver Capabilities) to tell the BIOS what features it can handle. While the ACPI spec says nothing about the OS invoking _PDC multiple times, doing so with changing bits seems to hopelessly confuse the BIOS on multiple platforms up to and including crashing the system. Factor out the _PDC invocation so Linux invokes it only once. http://bugzilla.kernel.org/show_bug.cgi?id=5483 Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> 2005-08-05T04:45:14Z Len Brown len.brown@intel.com 2005-08-05T04:44:28Z urn:sha1:4be44fcd3bf648b782f4460fd06dfae6c42ded4b Signed-off-by: Len Brown <len.brown@intel.com> 2005-07-12T04:14:36Z Venkatesh Pallipadi venkatesh.pallipadi@intel.com 2005-04-15T19:07:10Z urn:sha1:02df8b9385c21fdba165bd380f60eca1d3b0578b http://bugzilla.kernel.org/show_bug.cgi?id=4401 Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>