[Bug 9561] New: powernow-k8 cpuid c0f13 not supported w/ fx-74 CPUs

[Bug 9561] New: powernow-k8 cpuid c0f13 not supported w/ fx-74 CPUs

[bugme-daemon]

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: cpufreq@www.linux.org.uk
        ReportedBy: blackprince2000@hotmail.com


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


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[Bug 9561] powernow-k8 cpuid c0f13 not supported w/ fx-74 CPUs

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=9561





------- Comment #1 from blackprince2000@hotmail.com  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

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=9561


mark.langsdorf@amd.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|cpufreq@www.linux.org.uk    |mark.langsdorf@amd.com
             Status|NEW                         |ASSIGNED




------- Comment #2 from mark.langsdorf@amd.com  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     0x80000000


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