vasilito
4325590686
Includes: init (PID 1), hiperiso-lib.sh, qemu_launch.sh, hw_collect.sh, kvm_check.sh, fallback_boot.sh, log_flush.sh, conf_replace.sh, make_floppy.sh. 13-phase boot timing, 18 QEMU HMP commands, network pcap capture.
83 lines
2.8 KiB
Bash
Executable File
83 lines
2.8 KiB
Bash
Executable File
#!/bin/sh
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# ============================================================
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# kvm_check.sh -- Detect KVM / hardware virtualization support
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# Output: "KVM_OK" on success
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# "KVM_FAIL:<reason>" on failure
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# Exit: 0 on success, 1 on failure
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# ============================================================
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# ── Helper: attempt to load a kernel module ──────────────────
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_try_modprobe() {
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if command -v modprobe >/dev/null 2>&1; then
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modprobe "$1" 2>/dev/null
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return $?
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fi
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if command -v insmod >/dev/null 2>&1; then
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# Fallback: try insmod with common module paths
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for _modpath in \
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"/lib/modules/$(uname -r 2>/dev/null)/kernel/arch/x86/kvm/$1.ko" \
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"/lib/modules/$(uname -r 2>/dev/null)/$1.ko" \
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"/$1.ko"; do
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if [ -f "$_modpath" ]; then
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insmod "$_modpath" 2>/dev/null && return 0
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fi
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done
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fi
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return 1
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}
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# ── Check 1: /dev/kvm already exists ─────────────────────────
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if [ -c /dev/kvm ]; then
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printf 'KVM_OK\n'
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exit 0
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fi
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# ── Check 2: CPU supports virtualization ─────────────────────
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# vmx = Intel VT-x, svm = AMD-V
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if ! grep -q -E '(vmx|svm)' /proc/cpuinfo 2>/dev/null; then
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printf 'KVM_FAIL:no_hw_virt (CPU lacks vmx/svm flags -- check BIOS/UEFI settings)\n'
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exit 1
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fi
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# ── Determine CPU vendor for correct KVM module ──────────────
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_cpu_vendor=""
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if [ -f /proc/cpuinfo ]; then
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_cpu_vendor=$(grep -m1 '^vendor_id' /proc/cpuinfo 2>/dev/null \
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| cut -d: -f2 | tr -d ' ')
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fi
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# ── Check 3: Load KVM kernel modules ─────────────────────────
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_try_modprobe kvm
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case "$_cpu_vendor" in
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GenuineIntel)
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_try_modprobe kvm-intel
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;;
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AuthenticAMD)
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_try_modprobe kvm-amd
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;;
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*)
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# Unknown vendor -- try both
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_try_modprobe kvm-intel 2>/dev/null || _try_modprobe kvm-amd 2>/dev/null
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;;
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esac
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# Give devtmpfs/udev a moment to create the device node
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sleep 1
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# ── Check 4: Verify /dev/kvm now exists ──────────────────────
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if [ ! -e /dev/kvm ]; then
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printf 'KVM_FAIL:no_dev_kvm (modules may not have loaded -- dmesg for details)\n'
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exit 1
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fi
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# ── Check 5: Verify /dev/kvm is a char device ────────────────
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if [ ! -c /dev/kvm ]; then
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printf 'KVM_FAIL:dev_kvm_not_char_device\n'
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exit 1
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fi
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# ── Success ──────────────────────────────────────────────────
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printf 'KVM_OK\n'
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exit 0
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