Re: HTT on single CPU?

On Wed, Jul 09, 2003 at 11:54:40PM +0200, Jens Rehsack wrote:
> M. Warner Losh wrote:
> 
> >In message: <20030709150718.GC28375_at_Odin.AC.HMC.Edu>
> >            Brooks Davis <brooks_at_one-eyed-alien.net> writes:
> >: P4's below ~3.1GHz do not actually provide logical CPU support.
> >
> >We have several 2.4GHz parts that appear to contradict this
> >statement.  However, we can't use HTT w/o a proper motherboard that
> >supports HTT CPUs.
> 
> How can I found out whether a board supports HTT or not?
> I haven't seen it in none description I checked. Are some
> chipsets (865, 875) always ready or is the bios programmer
> the guy who must activate this feature?

865 definitely is:

FreeBSD 4.8-STABLE #1: Tue Jul  8 21:33:34 CEST 2003
    root_at_freebie.xs4all.nl:/usr/src/sys/compile/SMPFREEBIE
Timecounter "i8254"  frequency 1193182 Hz
CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (2398.86-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf29  Stepping = 9

Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Hyperthreading: 2 logical CPUs
real memory  = 536018944 (523456K bytes)
avail memory = 517574656 (505444K bytes)
Programming 24 pins in IOAPIC #0
IOAPIC #0 intpin 2 -> irq 0
FreeBSD/SMP: Multiprocessor motherboard
 cpu0 (BSP): apic id:  0, version: 0x00050014, at 0xfee00000
 cpu1 (AP):  apic id:  1, version: 0x00050014, at 0xfee00000
 io0 (APIC): apic id:  2, version: 0x00178020, at 0xfec00000
Preloaded elf kernel "kernel" at 0xc03e2000.
Pentium Pro MTRR support enabled
Using $PIR table, 14 entries at 0xc00f53c0
apm0: <APM BIOS> on motherboard
apm0: found APM BIOS v1.2, connected at v1.2
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Host to PCI bridge> on motherboard
IOAPIC #0 intpin 16 -> irq 2
IOAPIC #0 intpin 19 -> irq 5
IOAPIC #0 intpin 18 -> irq 10
IOAPIC #0 intpin 17 -> irq 11
pci0: <PCI bus> on pcib0
agp0: <Intel 82865 host to AGP bridge> mem 0xf8000000-0xfbffffff at device
0.0 on pci0
pcib1: <PCI to PCI bridge (vendor=8086 device=2571)> at device 1.0 on pci0


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