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linux/arch/i386/kernel/cpu
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Rafal Bilski 52a2638bff Longhaul: add auto enabled "revid_errata" option 
VIA C3 Ezra-T has RevisionID equal to 1, but it needs RevisionKey to be 0
or CPU will ignore new frequency and will continue to work at old
frequency.  New "revid_errata" option will force RevisionKey to be set to
0, whatever RevisionID is.

Additionaly "Longhaul" will not silently ignore unsuccessful transition.
It will try to check if "revid_errata" or "disable_acpi_c3" options need to
be enabled for this processor/system.

Same for Longhaul ver.  2 support.  It will be disabled if none of above
options will work.

 Best case scenario (with patch apllied and v2 enabled):
 longhaul: VIA C3 'Ezra' [C5C] CPU detected.  Longhaul v2 supported.
 longhaul: Using northbridge support.
 longhaul: VRM 8.5
 longhaul: Max VID=1.350  Min VID=1.050, 13 possible voltage scales
 longhaul: f: 300000 kHz, index: 0, vid: 1050 mV
 [...]
 longhaul: Voltage scaling enabled.
 Worst case scenario:
 longhaul: VIA C3 'Ezra-T' [C5M] CPU detected.  Powersaver supported.
 longhaul: Using northbridge support.
 longhaul: Using ACPI support.
 longhaul: VRM 8.5
 longhaul: Claims to support voltage scaling but min & max are both 1.250. Voltage scaling disabled
 longhaul: Failed to set requested frequency!
 longhaul: Enabling "Ignore Revision ID" option.
 longhaul: Failed to set requested frequency!
 longhaul: Disabling ACPI C3 support.
 longhaul: Disabling "Ignore Revision ID" option.
 longhaul: Failed to set requested frequency!
 longhaul: Enabling "Ignore Revision ID" option.

[akpm@linux-foundation.org: coding-style cleanups]
Signed-off-by: Rafal Bilski <rafalbilski@interia.pl>
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-07 16:28:43 -07:00
..
cpufreq Longhaul: add auto enabled "revid_errata" option 2007-10-07 16:28:43 -07:00
mcheck x86: Stop MCEs and NMIs during code patching 2007-07-22 11:03:37 -07:00
mtrr x86: Replace NSC/Cyrix specific chipset access macros by inlined functions. 2007-07-22 11:03:38 -07:00
addon_cpuid_features.c Use a new CPU feature word to cover features that are spread around 2007-07-12 10:55:54 -07:00
amd.c i386: Use global flag to disable broken local apic timer on AMD CPUs. 2007-08-11 15:58:13 -07:00
bugs.c i386: include asm/bugs.h in bugs.c for check_bugs prototype 2007-07-31 15:39:42 -07:00
centaur.c [PATCH] i386: Don't delete cpu_devs data to identify different x86 types in late_initcall 2007-05-02 19:27:22 +02:00
common.c x86: remove support for the Rise CPU 2007-07-21 18:37:10 -07:00
cpu.h [PATCH] i386: remove redundant generic_identify() calls when identifying cpus 2006-09-26 10:52:36 +02:00
cyrix.c x86: Replace NSC/Cyrix specific chipset access macros by inlined functions. 2007-07-22 11:03:38 -07:00
intel_cacheinfo.c x86_64: Prevent doing anything from cache_remove_dev() when info setup failed. 2007-09-12 09:28:06 -07:00
intel.c [PATCH] i386: Implement X86_FEATURE_SYNC_RDTSC on i386 2007-05-02 19:27:20 +02:00
Makefile x86: remove support for the Rise CPU 2007-07-21 18:37:10 -07:00
nexgen.c [PATCH] i386: Don't delete cpu_devs data to identify different x86 types in late_initcall 2007-05-02 19:27:22 +02:00
perfctr-watchdog.c i386: Fix perfctr watchdog on core duo 2007-09-10 18:57:47 -07:00
proc.c Use a new CPU feature word to cover features that are spread around 2007-07-12 10:55:54 -07:00
transmeta.c i386: cpu/transmeta.c: fix definition of USER686 2007-05-09 12:49:33 -07:00
umc.c [PATCH] i386: Don't delete cpu_devs data to identify different x86 types in late_initcall 2007-05-02 19:27:22 +02:00