Bug 1605125

Summary: Fedora 28 - Kernel should not be built with POWER7_CPU=y and CPU_LITTLE_ENDIAN=y
Product: [Fedora] Fedora Reporter: IBM Bug Proxy <bugproxy>
Component: kernelAssignee: Dan Horák <dan>
Status: CLOSED CURRENTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: unspecified    
Version: rawhideCC: airlied, bskeggs, dan, ewk, hannsj_uhl, hdegoede, ichavero, itamar, jarodwilson, jglisse, jkachuck, john.j5live, jonathan, josef, kernel-maint, linville, mchehab, mjg59, steved
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Hardware: ppc64le   
OS: Linux   
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Last Closed: 2018-08-03 15:17:19 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Blocks: 1071880    

Description IBM Bug Proxy 2018-07-20 08:50:16 UTC
Comment 1 IBM Bug Proxy 2018-07-20 08:50:36 UTC 
== Comment: #0 - Sandipan Das <sadas034.com> - 2018-07-06 02:13:41 ==
Little-endian mode is officially supported for POWER8 and newer only. There are some other kernel build configuration options such as HAVE_EFFICIENT_UNALIGNED_ACCESS that depend on having POWER7_CPU=n when CPU_LITTLE_ENDIAN=y. This can cause failures in certain cases such as the TEST_BPF runtime tests.
Comment 2 Hanns-Joachim Uhl 2018-07-28 16:05:49 UTC 
fyi ... as an example:
$ grep CONFIG_POWER ./lib/modules/4.17.6-200.fc28.ppc64le/config 
CONFIG_POWER7_CPU=y
# CONFIG_POWER8_CPU is not set
# CONFIG_POWER9_CPU is not set

RHEL kernels are fine. They set CONFIG_POWER8_CPU=y.
Comment 3 Dan Horák 2018-07-31 09:06:55 UTC 
it's now part of https://src.fedoraproject.org/rpms/kernel/pull-request/16