New: powernow-k8 cpuid c0f13 not supported w/ fx-74 CPUs
http://bugzilla.kernel.org/show_bug.cgi?id=9561
Summary: powernow-k8 cpuid c0f13 not supported w/ fx-74 CPUs
Product: Power Management
Version: 2.5
KernelVersion: 2.6.24-rc4-git6
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: low
Priority: P1
Component: cpufreq
AssignedTo: [email protected]
ReportedBy: [email protected]
Most recent kernel where this bug did not occur: unknown
Distribution: gcc version 4.1.2 (Gentoo 4.1.2 p1.0.2)
Hardware Environment: 2xAMD Athlon FX-74 CPUs on ASUS L1N64-SLI WS NF680a 1207 MB
Software Environment: gentoo
Problem Description:
While trying to enable Cool'n'Quiet, dmesg error with:
powernow-k8: Processor cpuid c0f13 not supported
powernow-k8: Processor cpuid c0f13 not supported
powernow-k8: Processor cpuid c0f13 not supported
powernow-k8: Processor cpuid c0f13 not supported
Tried w/ powernow-k8 build as a module as well as build into kernel... same result.
Steps to reproduce:
1. compile kernel with powernow-k8 support
2. boot on Athlon FX-74 CPU
Signature · 3 lines
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[Bug 9561] powernow-k8 cpuid c0f13 not supported w/ fx-74 CPUs
http://bugzilla.kernel.org/show_bug.cgi?id=9561
------- Comment #1 from [email protected] 2007-12-14 09:47 ------- Created an attachment (id=14038)
--> (http://bugzilla.kernel.org/attachment.cgi?id=14038&action=view)
x86info output
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[Bug 9561] powernow-k8 cpuid c0f13 not supported w/ fx-74 CPUs
In reply to [email protected]http://bugzilla.kernel.org/show_bug.cgi?id=9561
[email protected] changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|[email protected] |[email protected] Status|NEW |ASSIGNED
------- Comment #2 from [email protected] 2007-12-14 10:08 ------- Looks like it should be pretty easy to fix. Try this patch:
--- linux-2.6.23-git18-vanilla/arch/x86/kernel/cpu/cpufreq/powernow-k8.h.old
2007-12-14 12:15:06.000000000 -0600
+++ linux-2.6.23-git18-vanilla/arch/x86/kernel/cpu/cpufreq/powernow-k8.h
2007-12-14 12:15:27.000000000 -0600
@@ -47,7 +47,7 @@ struct powernow_k8_data {
#define CPUID_XFAM 0x0ff00000 /* extended family */
#define CPUID_XFAM_K8 0
#define CPUID_XMOD 0x000f0000 /* extended model */
-#define CPUID_XMOD_REV_MASK 0x00080000
+#define CPUID_XMOD_REV_MASK 0x000c0000
#define CPUID_XFAM_10H 0x00100000 /* family 0x10 */
#define CPUID_USE_XFAM_XMOD 0x00000f00
#define CPUID_GET_MAX_CAPABILITIES 0x80000000Signature · 4 lines
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