9.0-BETA2 do not support SpeedStep on E5420

Hi,

>From today's -CURRENT:

Copyright (c) 1992-2011 The FreeBSD Project.
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        The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 9.0-BETA2 #17 r225560+be1f8b9: Thu Sep 15 12:05:41 EDT 2011
    al_at_shai-hulud:/data/src/freebsd/obj/master/i386.i386/data/src/freebsd/src/sys/GENERIC
i386
CPU: Intel(R) Xeon(R) CPU           E5420  _at_ 2.50GHz (2493.80-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x1067a  Family = 6  Model = 17  Stepping = 10
  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>
  Features2=0x40ce3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,DCA,SSE4.1,XSAVE>
  AMD Features=0x20100000<NX,LM>
  AMD Features2=0x1<LAHF>
  TSC: P-state invariant, performance statistics
real memory  = 6442450944 (6144 MB)
avail memory = 3677458432 (3507 MB)
Event timer "LAPIC" quality 400
ACPI APIC Table: <100509 APIC1714>
FreeBSD/SMP: Multiprocessor System Detected: 8 CPUs
FreeBSD/SMP: 2 package(s) x 4 core(s)
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
 cpu2 (AP): APIC ID:  2
 cpu3 (AP): APIC ID:  3
 cpu4 (AP): APIC ID:  4
 cpu5 (AP): APIC ID:  5
 cpu6 (AP): APIC ID:  6
 cpu7 (AP): APIC ID:  7
[...]
est0: failed to enable SpeedStep
p4tcc0: <CPU Frequency Thermal Control> on cpu0
est1: failed to enable SpeedStep
p4tcc1: <CPU Frequency Thermal Control> on cpu1
est2: failed to enable SpeedStep
p4tcc2: <CPU Frequency Thermal Control> on cpu2
est3: failed to enable SpeedStep
p4tcc3: <CPU Frequency Thermal Control> on cpu3
est4: failed to enable SpeedStep
p4tcc4: <CPU Frequency Thermal Control> on cpu4
est5: failed to enable SpeedStep
p4tcc5: <CPU Frequency Thermal Control> on cpu5
est6: failed to enable SpeedStep
p4tcc6: <CPU Frequency Thermal Control> on cpu6
est7: failed to enable SpeedStep
p4tcc7: <CPU Frequency Thermal Control> on cpu7

It feels strange that the latest FreeBSD do not support est(4) on a 3
years old CPU...

Thanks,
 - Arnaud