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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> |
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| 8253pit.h | ||
| a.out.h | ||
| acpi.h | ||
| agp.h | ||
| alternative-asm.i | ||
| alternative.h | ||
| apic.h | ||
| apicdef.h | ||
| atomic.h | ||
| auxvec.h | ||
| bitops.h | ||
| boot.h | ||
| bootsetup.h | ||
| bug.h | ||
| bugs.h | ||
| byteorder.h | ||
| cache.h | ||
| cacheflush.h | ||
| calgary.h | ||
| calling.h | ||
| checksum.h | ||
| compat.h | ||
| cpu.h | ||
| cpufeature.h | ||
| cputime.h | ||
| current.h | ||
| debugreg.h | ||
| delay.h | ||
| desc.h | ||
| div64.h | ||
| dma-mapping.h | ||
| dma.h | ||
| dmi.h | ||
| dwarf2.h | ||
| e820.h | ||
| edac.h | ||
| elf.h | ||
| emergency-restart.h | ||
| errno.h | ||
| fcntl.h | ||
| fixmap.h | ||
| floppy.h | ||
| fpu32.h | ||
| futex.h | ||
| genapic.h | ||
| hardirq.h | ||
| hpet.h | ||
| hw_irq.h | ||
| hypertransport.h | ||
| i387.h | ||
| ia32_unistd.h | ||
| ia32.h | ||
| ide.h | ||
| idle.h | ||
| intel_arch_perfmon.h | ||
| io_apic.h | ||
| io.h | ||
| ioctl.h | ||
| ioctls.h | ||
| ipcbuf.h | ||
| ipi.h | ||
| irq_regs.h | ||
| irq.h | ||
| irqflags.h | ||
| k8.h | ||
| Kbuild | ||
| kdebug.h | ||
| kexec.h | ||
| kmap_types.h | ||
| kprobes.h | ||
| ldt.h | ||
| linkage.h | ||
| local.h | ||
| mach_apic.h | ||
| mc146818rtc.h | ||
| mce.h | ||
| mman.h | ||
| mmsegment.h | ||
| mmu_context.h | ||
| mmu.h | ||
| mmzone.h | ||
| module.h | ||
| mpspec.h | ||
| msgbuf.h | ||
| msidef.h | ||
| msr.h | ||
| mtrr.h | ||
| mutex.h | ||
| namei.h | ||
| nmi.h | ||
| node.h | ||
| numa.h | ||
| page.h | ||
| param.h | ||
| parport.h | ||
| pci-direct.h | ||
| pci.h | ||
| pda.h | ||
| percpu.h | ||
| pgalloc.h | ||
| pgtable.h | ||
| poll.h | ||
| posix_types.h | ||
| prctl.h | ||
| processor.h | ||
| proto.h | ||
| ptrace-abi.h | ||
| ptrace.h | ||
| resource.h | ||
| rtc.h | ||
| rwlock.h | ||
| scatterlist.h | ||
| seccomp.h | ||
| sections.h | ||
| segment.h | ||
| semaphore.h | ||
| sembuf.h | ||
| serial.h | ||
| setup.h | ||
| shmbuf.h | ||
| shmparam.h | ||
| sigcontext32.h | ||
| sigcontext.h | ||
| siginfo.h | ||
| signal.h | ||
| smp.h | ||
| socket.h | ||
| sockios.h | ||
| sparsemem.h | ||
| spinlock_types.h | ||
| spinlock.h | ||
| stacktrace.h | ||
| stat.h | ||
| statfs.h | ||
| string.h | ||
| suspend.h | ||
| swiotlb.h | ||
| system.h | ||
| tce.h | ||
| termbits.h | ||
| termios.h | ||
| therm_throt.h | ||
| thread_info.h | ||
| timex.h | ||
| tlb.h | ||
| tlbflush.h | ||
| topology.h | ||
| types.h | ||
| uaccess.h | ||
| ucontext.h | ||
| unaligned.h | ||
| unistd.h | ||
| unwind.h | ||
| user32.h | ||
| user.h | ||
| vga.h | ||
| vsyscall32.h | ||
| vsyscall.h | ||
| xor.h | ||