On 8/28/23 09:15, Florian Weimer wrote:
* Julian Sikorski:
I have noticed the following message in my kernel log today after I
attempted to decrypt my veracrypt external hard drive:
[20542.328594] AVX2 instructions are not detected.
[20542.382731] AVX or AES-NI instructions are not detected.
...
$ ld.so --list-diagnostics
dl_dst_lib="lib64"
dl_hwcap=0x2
dl_hwcap_important=0x6
dl_hwcap2=0x2
dl_hwcaps_subdirs="x86-64-v4:x86-64-v3:x86-64-v2"
dl_hwcaps_subdirs_active=0x6
That indicates that userspace has access to AVX2 CPU capabilities.
So this must some kernel thing. Sorry, no idea what is going on.
I have the same ld.so output, but my CPU (Intel Core i7-3770) reports
only AVX in /proc/cpuinfo (no avx2).
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 rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology
nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx
est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt
tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm cpuid_fault epb pti
ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase smep
erms xsaveopt dtherm ida arat pln pts md_clear flush_l1d
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