991528d734
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> |
||
|---|---|---|
| .. | ||
| acpi | ||
| cpufreq | ||
| Makefile | ||
| aperture.c | ||
| apic.c | ||
| asm-offsets.c | ||
| audit.c | ||
| crash.c | ||
| crash_dump.c | ||
| e820.c | ||
| early-quirks.c | ||
| early_printk.c | ||
| entry.S | ||
| functionlist | ||
| genapic.c | ||
| genapic_cluster.c | ||
| genapic_flat.c | ||
| head.S | ||
| head64.c | ||
| i387.c | ||
| i8259.c | ||
| init_task.c | ||
| io_apic.c | ||
| ioport.c | ||
| irq.c | ||
| k8.c | ||
| kprobes.c | ||
| ldt.c | ||
| machine_kexec.c | ||
| mce.c | ||
| mce_amd.c | ||
| mce_intel.c | ||
| module.c | ||
| mpparse.c | ||
| nmi.c | ||
| pci-calgary.c | ||
| pci-dma.c | ||
| pci-gart.c | ||
| pci-nommu.c | ||
| pci-swiotlb.c | ||
| pmtimer.c | ||
| process.c | ||
| ptrace.c | ||
| reboot.c | ||
| relocate_kernel.S | ||
| setup.c | ||
| setup64.c | ||
| signal.c | ||
| smp.c | ||
| smpboot.c | ||
| stacktrace.c | ||
| suspend.c | ||
| suspend_asm.S | ||
| sys_x86_64.c | ||
| syscall.c | ||
| tce.c | ||
| time.c | ||
| trampoline.S | ||
| traps.c | ||
| vmlinux.lds.S | ||
| vsmp.c | ||
| vsyscall.c | ||
| x8664_ksyms.c | ||