Bug 731961

Summary:	microcode.ko does not support AMD family 15
Product:	[Fedora] Fedora	Reporter:	Vittorio <vitti570>
Component:	kernel	Assignee:	Kernel Maintainer List <kernel-maint>
Status:	CLOSED NOTABUG	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	low	Docs Contact:
Priority:	unspecified
Version:	15	CC:	aquini, gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, vitti570
Target Milestone:	---
Target Release:	---
Hardware:	athlon
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-08-20 09:00:17 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Vittorio 2011-08-19 09:32:34 UTC

Description of problem:
I just installed kernel-2.6.40.3-0.fc15.x86_64.rpm
on my AMD Athlon 64 3500+ family 15.

Unfortunately the kernel crashes at boot time issuing a lot of messages

microcode: CPU0: family 15 not supported


It seems that microcode.ko does not support family 15 AMD processors.

I fixed the issue substituting line 79 of microcode_amd.c


      if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10) {


with the following


      if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x0F) {


After regenerating microcode.ko the kernel boots just fine.

First time I got this situation was with 2.6.40-4.

Until 2.6.38.8-35 everything was fine. I never installed 2.6.39.

Is this the correct fix or can you suggest me a better one?


Version-Release number of selected component (if applicable):


How reproducible: Always


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:

Comment 1 Josh Boyer 2011-08-19 11:56:45 UTC

What version of microcode_ctl do you have installed?  This is likely a dupe of bug 690930.  You need:

1. microcode_ctl-1.17-18.fc15
2. kernel-2.6.40.3-0.fc15

Comment 2 Vittorio 2011-08-20 09:00:17 UTC

Yes, installing microcode_ctl-1.17-18 fixed the issue.