Report all interestings flags for a given CPU

report-cpu-flags.sh

#!/bin/bash

# This script reports the most common CPU flags to pay attention.
# Usage:
# curl https://gist.githubusercontent.com/mrjk/28a1082d201c7c8c30b788a7b47e820d/raw/54c37076fd8e3f118867d1575efe074724eb1d5b/report-cpu-flags.sh | bash


declare -A flags=(
  [vmx]="virt: Intel Virtualisation (VT-x)"
  [svm]="virt: AMD Virtualisation (AMD-V)"
  [aes]="enc: AES Hardware Encryption"
  [avx]="perf: AVX (Advanced Vector Extensions)"
  [avx2]="perf: AVX2 (256-bit vector ops)"
  [avx512f]="perf: AVX-512 (512-bit vector ops)"
  [sse4_2]="perf: SSE 4.2"
  [rdrand]="security: Hardware Random Number Generator"
  [nx]="security: NX/XD Bit (No-Execute protection)"
  [lm]="perf: 64-bit CPU support"
  [ht]="perf: Hyper-Threading"
  [fma]="perf: Fused Multiply-Add"
  [sha_ni]="enc: SHA Hardware Acceleration"
  [tsc]="perf: Time Stamp Counter"
  [smx]="security: Intel TXT (Trusted Execution)"
  [tm2]="perf: Thermal Monitor"
  [pdpe1gb]="perf: 1GB Huge Pages support"
)

report_flags () {
  local GREEN='\033[0;32m'
  local RED='\033[0;31m'
  local NC='\033[0m'
  local cpu_flags=$(grep -m1 flags /proc/cpuinfo)

  echo "=== CPU Feature Check ==="
  for flag in "${!flags[@]}"; do
    if echo "$cpu_flags" | grep -qw "$flag"; then
      echo -e "${GREEN}[YES]${NC} ${flags[$flag]} ($flag)"
    else
      echo -e "${RED}[NO] ${NC} ${flags[$flag]} ($flag)"
    fi
  done | sort -t: -k1,1 -k2,2
}

report_flags