Re: AVX extensions not detected properly on a Zen 2 CPU?

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Am 28.08.23 um 14:39 schrieb Florian Weimer:
* 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.
[20542.404097] AVX or AES-NI instructions are not detected.
[20542.560078] AVX2 instructions are not detected.

My CPU (AMD Ryzen 5 4500U) supports aes, avx and avx2 according to
/proc/cpuid. Is this a bug?

What does ld.so --list-diagnostics show?  Is this a virtual machine?

It is not a VM, bare metal Fedora 38 install. It is a ZenBook UM425IA laptop.

$ 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
dl_pagesize=0x1000
dl_platform="x86_64"
dl_profile_output="/var/tmp"
dl_string_platform=0xffffffffffffffff
dso.ld="ld-linux-x86-64.so.2"
dso.libc="libc.so.6"
env_filtered[0x0]="SHELL"
env_filtered[0x1]="SESSION_MANAGER"
env_filtered[0x2]="COLORTERM"
env_filtered[0x3]="HISTCONTROL"
env_filtered[0x4]="XDG_MENU_PREFIX"
env_filtered[0x5]="HISTSIZE"
env_filtered[0x6]="HOSTNAME"
env_filtered[0x7]="SSH_AUTH_SOCK"
env_filtered[0x8]="XMODIFIERS"
env_filtered[0x9]="DESKTOP_SESSION"
env_filtered[0xa]="EDITOR"
env_filtered[0xb]="PWD"
env_filtered[0xc]="LOGNAME"
env_filtered[0xd]="XDG_SESSION_DESKTOP"
env_filtered[0xe]="XDG_SESSION_TYPE"
env_filtered[0xf]="SYSTEMD_EXEC_PID"
env_filtered[0x10]="XAUTHORITY"
env_filtered[0x11]="GDM_LANG"
env_filtered[0x12]="HOME"
env_filtered[0x13]="USERNAME"
env[0x14]="LANG=de_DE.UTF-8"
env_filtered[0x15]="LS_COLORS"
env_filtered[0x16]="XDG_CURRENT_DESKTOP"
env_filtered[0x17]="VTE_VERSION"
env_filtered[0x18]="WAYLAND_DISPLAY"
env_filtered[0x19]="INVOCATION_ID"
env_filtered[0x1a]="MANAGERPID"
env_filtered[0x1b]="MOZ_GMP_PATH"
env_filtered[0x1c]="GNOME_SETUP_DISPLAY"
env_filtered[0x1d]="XDG_SESSION_CLASS"
env_filtered[0x1e]="TERM"
env_filtered[0x1f]="LESSOPEN"
env_filtered[0x20]="USER"
env_filtered[0x21]="DISPLAY"
env_filtered[0x22]="SHLVL"
env_filtered[0x23]="QT_IM_MODULE"
env_filtered[0x24]="XDG_RUNTIME_DIR"
env_filtered[0x25]="DEBUGINFOD_URLS"
env_filtered[0x26]="JOURNAL_STREAM"
env_filtered[0x27]="XDG_DATA_DIRS"
env[0x28]="PATH=/home/julas/.local/bin:/home/julas/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin"
env_filtered[0x29]="GDMSESSION"
env_filtered[0x2a]="DBUS_SESSION_BUS_ADDRESS"
env_filtered[0x2b]="MAIL"
env_filtered[0x2c]="_"
path.prefix="/usr"
path.rtld="/lib64/ld-linux-x86-64.so.2"
path.sysconfdir="/etc"
path.system_dirs[0x0]="/lib64/"
path.system_dirs[0x1]="/usr/lib64/"
version.release="stable"
version.version="2.37"
auxv[0x0].a_type=0x21
auxv[0x0].a_val=0x7fff469d0000
auxv[0x1].a_type=0x33
auxv[0x1].a_val=0x6f0
auxv[0x2].a_type=0x10
auxv[0x2].a_val=0x178bfbff
auxv[0x3].a_type=0x6
auxv[0x3].a_val=0x1000
auxv[0x4].a_type=0x11
auxv[0x4].a_val=0x64
auxv[0x5].a_type=0x3
auxv[0x5].a_val=0x7f73e0dde040
auxv[0x6].a_type=0x4
auxv[0x6].a_val=0x38
auxv[0x7].a_type=0x5
auxv[0x7].a_val=0xb
auxv[0x8].a_type=0x7
auxv[0x8].a_val=0x0
auxv[0x9].a_type=0x8
auxv[0x9].a_val=0x0
auxv[0xa].a_type=0x9
auxv[0xa].a_val=0x7f73e0df93b0
auxv[0xb].a_type=0xb
auxv[0xb].a_val=0x3e8
auxv[0xc].a_type=0xc
auxv[0xc].a_val=0x3e8
auxv[0xd].a_type=0xd
auxv[0xd].a_val=0x3e8
auxv[0xe].a_type=0xe
auxv[0xe].a_val=0x3e8
auxv[0xf].a_type=0x17
auxv[0xf].a_val=0x0
auxv[0x10].a_type=0x19
auxv[0x10].a_val=0x7fff46996c99
auxv[0x11].a_type=0x1a
auxv[0x11].a_val=0x2
auxv[0x12].a_type=0x1f
auxv[0x12].a_val="/usr/bin/ld.so"
auxv[0x13].a_type=0xf
auxv[0x13].a_val="x86_64"
auxv[0x14].a_type=0x1b
auxv[0x14].a_val=0x1c
auxv[0x15].a_type=0x1c
auxv[0x15].a_val=0x20
uname.sysname="Linux"
uname.nodename="snowball3"
uname.release="6.4.12-200.fc38.x86_64"
uname.version="#1 SMP PREEMPT_DYNAMIC Wed Aug 23 17:46:49 UTC 2023"
uname.machine="x86_64"
uname.domainname="(none)"
x86.cpu_features.basic.kind=0x2
x86.cpu_features.basic.max_cpuid=0x10
x86.cpu_features.basic.family=0x17
x86.cpu_features.basic.model=0x60
x86.cpu_features.basic.stepping=0x1
x86.cpu_features.features[0x0].cpuid[0x0]=0x860f01
x86.cpu_features.features[0x0].cpuid[0x1]=0x6060800
x86.cpu_features.features[0x0].cpuid[0x2]=0x7ed8320b
x86.cpu_features.features[0x0].cpuid[0x3]=0x178bfbff
x86.cpu_features.features[0x0].active[0x0]=0x0
x86.cpu_features.features[0x0].active[0x1]=0x0
x86.cpu_features.features[0x0].active[0x2]=0x7ed83203
x86.cpu_features.features[0x0].active[0x3]=0x17888110
x86.cpu_features.features[0x1].cpuid[0x0]=0x0
x86.cpu_features.features[0x1].cpuid[0x1]=0x219c91a9
x86.cpu_features.features[0x1].cpuid[0x2]=0x400004
x86.cpu_features.features[0x1].cpuid[0x3]=0x0
x86.cpu_features.features[0x1].active[0x0]=0x0
x86.cpu_features.features[0x1].active[0x1]=0x218c0128
x86.cpu_features.features[0x1].active[0x2]=0x400000
x86.cpu_features.features[0x1].active[0x3]=0x0
x86.cpu_features.features[0x2].cpuid[0x0]=0x860f01
x86.cpu_features.features[0x2].cpuid[0x1]=0x0
x86.cpu_features.features[0x2].cpuid[0x2]=0x75c237ff
x86.cpu_features.features[0x2].cpuid[0x3]=0x2fd3fbff
x86.cpu_features.features[0x2].active[0x0]=0x0
x86.cpu_features.features[0x2].active[0x1]=0x0
x86.cpu_features.features[0x2].active[0x2]=0x161
x86.cpu_features.features[0x2].active[0x3]=0x8000000
x86.cpu_features.features[0x3].cpuid[0x0]=0xf
x86.cpu_features.features[0x3].cpuid[0x1]=0x340
x86.cpu_features.features[0x3].cpuid[0x2]=0x0
x86.cpu_features.features[0x3].cpuid[0x3]=0x0
x86.cpu_features.features[0x3].active[0x0]=0x7
x86.cpu_features.features[0x3].active[0x1]=0x0
x86.cpu_features.features[0x3].active[0x2]=0x0
x86.cpu_features.features[0x3].active[0x3]=0x0
x86.cpu_features.features[0x4].cpuid[0x0]=0x0
x86.cpu_features.features[0x4].cpuid[0x1]=0x1b
x86.cpu_features.features[0x4].cpuid[0x2]=0x0
x86.cpu_features.features[0x4].cpuid[0x3]=0x6799
x86.cpu_features.features[0x4].active[0x0]=0x0
x86.cpu_features.features[0x4].active[0x1]=0x0
x86.cpu_features.features[0x4].active[0x2]=0x0
x86.cpu_features.features[0x4].active[0x3]=0x0
x86.cpu_features.features[0x5].cpuid[0x0]=0x3030
x86.cpu_features.features[0x5].cpuid[0x1]=0x90cf757
x86.cpu_features.features[0x5].cpuid[0x2]=0x6005
x86.cpu_features.features[0x5].cpuid[0x3]=0x10000
x86.cpu_features.features[0x5].active[0x0]=0x0
x86.cpu_features.features[0x5].active[0x1]=0x200
x86.cpu_features.features[0x5].active[0x2]=0x0
x86.cpu_features.features[0x5].active[0x3]=0x0
x86.cpu_features.features[0x6].cpuid[0x0]=0x0
x86.cpu_features.features[0x6].cpuid[0x1]=0x0
x86.cpu_features.features[0x6].cpuid[0x2]=0x0
x86.cpu_features.features[0x6].cpuid[0x3]=0x0
x86.cpu_features.features[0x6].active[0x0]=0x0
x86.cpu_features.features[0x6].active[0x1]=0x0
x86.cpu_features.features[0x6].active[0x2]=0x0
x86.cpu_features.features[0x6].active[0x3]=0x0
x86.cpu_features.features[0x7].cpuid[0x0]=0x0
x86.cpu_features.features[0x7].cpuid[0x1]=0x0
x86.cpu_features.features[0x7].cpuid[0x2]=0x0
x86.cpu_features.features[0x7].cpuid[0x3]=0x0
x86.cpu_features.features[0x7].active[0x0]=0x0
x86.cpu_features.features[0x7].active[0x1]=0x0
x86.cpu_features.features[0x7].active[0x2]=0x0
x86.cpu_features.features[0x7].active[0x3]=0x0
x86.cpu_features.features[0x8].cpuid[0x0]=0x0
x86.cpu_features.features[0x8].cpuid[0x1]=0x0
x86.cpu_features.features[0x8].cpuid[0x2]=0x0
x86.cpu_features.features[0x8].cpuid[0x3]=0x0
x86.cpu_features.features[0x8].active[0x0]=0x0
x86.cpu_features.features[0x8].active[0x1]=0x0
x86.cpu_features.features[0x8].active[0x2]=0x0
x86.cpu_features.features[0x8].active[0x3]=0x0
x86.cpu_features.preferred.Fast_Rep_String=0x0
x86.cpu_features.preferred.Fast_Copy_Backward=0x0
x86.cpu_features.preferred.Slow_BSF=0x0
x86.cpu_features.preferred.Fast_Unaligned_Load=0x0
x86.cpu_features.preferred.Prefer_PMINUB_for_stringop=0x0
x86.cpu_features.preferred.Fast_Unaligned_Copy=0x0
x86.cpu_features.preferred.I586=0x1
x86.cpu_features.preferred.I686=0x1
x86.cpu_features.preferred.Slow_SSE4_2=0x0
x86.cpu_features.preferred.AVX_Fast_Unaligned_Load=0x1
x86.cpu_features.preferred.Prefer_No_VZEROUPPER=0x0
x86.cpu_features.preferred.Prefer_ERMS=0x0
x86.cpu_features.preferred.Prefer_No_AVX512=0x0
x86.cpu_features.preferred.MathVec_Prefer_No_AVX512=0x0
x86.cpu_features.preferred.Prefer_FSRM=0x0
x86.cpu_features.preferred.Avoid_Short_Distance_REP_MOVSB=0x0
x86.cpu_features.isa_1=0x7
x86.cpu_features.xsave_state_size=0x380
x86.cpu_features.xsave_state_full_size=0x380
x86.cpu_features.data_cache_size=0x8000
x86.cpu_features.shared_cache_size=0x400000
x86.cpu_features.non_temporal_threshold=0x300000
x86.cpu_features.rep_movsb_threshold=0x2000
x86.cpu_features.rep_movsb_stop_threshold=0x80000
x86.cpu_features.rep_stosb_threshold=0x800
x86.cpu_features.level1_icache_size=0x8000
x86.cpu_features.level1_icache_linesize=0x40
x86.cpu_features.level1_dcache_size=0x8000
x86.cpu_features.level1_dcache_assoc=0x8
x86.cpu_features.level1_dcache_linesize=0x40
x86.cpu_features.level2_cache_size=0x80000
x86.cpu_features.level2_cache_assoc=0x8
x86.cpu_features.level2_cache_linesize=0x40
x86.cpu_features.level3_cache_size=0x400000
x86.cpu_features.level3_cache_assoc=0x10
x86.cpu_features.level3_cache_linesize=0x40
x86.cpu_features.level4_cache_size=0xffffffffffffffff


Thanks,
Florian

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