2017-12-14 02:24 UTC

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IDProjectCategoryView StatusLast Update
0013447CentOS-7kernelpublic2017-06-18 11:43
Reporterporutchik 
PrioritynormalSeverityminorReproducibilityalways
StatusnewResolutionopen 
Product Version 
Target VersionFixed in Version 
Summary0013447: rng-tools does not work on Xeon E5-26xx V3, but works on V2 and V4
DescriptionTrying to start rngd service and it woks on old V2 and new V4 xeon processors, but not on V3

1. Good
# uname -r
3.10.0-514.6.1.el7.x86_64
# pcregrep 'model name|rdrand' /proc/cpuinfo | head -2
model name : Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms xsaveopt
# rngd -v --no-tpm=1
Available entropy sources:
    DRNG

2. Good
# uname -r
3.10.0-327.el7.x86_64
# pcregrep 'model name|rdrand' /proc/cpuinfo | head -2
model name : Intel(R) Xeon(R) CPU E5-2603 v4 @ 1.70GHz
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm rdseed adx smap xsaveopt cqm_llc cqm_occup_llc
# rngd -v --no-tpm=1
Available entropy sources:
    DRNG

3. Bad
# uname -r
3.10.0-514.6.1.el7.x86_64
# pcregrep 'model name|rdrand' /proc/cpuinfo | head -2
model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer xsave avx f16c rdrand lahf_lm abm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid cqm xsaveopt cqm_llc cqm_occup_llc
# rngd -v --no-tpm=1
can't open any entropy source
Maybe RNG device modules are not loaded

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Date Modified Username Field Change
2017-06-18 11:43 porutchik New Issue
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