mirror of
https://github.com/vdsm/virtual-dsm.git
synced 2025-02-24 13:30:02 +08:00
145 lines
3.3 KiB
Bash
145 lines
3.3 KiB
Bash
#!/usr/bin/env bash
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set -Eeuo pipefail
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# Docker environment variables
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: "${KVM:="Y"}"
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: "${HOST_CPU:=""}"
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: "${CPU_FLAGS:=""}"
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: "${CPU_MODEL:=""}"
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: "${DEF_MODEL:="qemu64"}"
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if [[ "${ARCH,,}" != "amd64" ]]; then
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KVM="N"
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warn "your CPU architecture is ${ARCH^^} and cannot provide KVM acceleration for x64 instructions, this will cause a major loss of performance."
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fi
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if [[ "$KVM" != [Nn]* ]]; then
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KVM_ERR=""
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if [ ! -e /dev/kvm ]; then
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KVM_ERR="(device file missing)"
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else
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if ! sh -c 'echo -n > /dev/kvm' &> /dev/null; then
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KVM_ERR="(no write access)"
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else
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flags=$(sed -ne '/^flags/s/^.*: //p' /proc/cpuinfo)
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if ! grep -qw "vmx\|svm" <<< "$flags"; then
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KVM_ERR="(vmx/svm disabled)"
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fi
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fi
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fi
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if [ -n "$KVM_ERR" ]; then
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KVM="N"
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if [[ "$OSTYPE" =~ ^darwin ]]; then
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warn "you are using macOS which has no KVM support, this will cause a major loss of performance."
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else
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error "KVM acceleration not available $KVM_ERR, this will cause a major loss of performance."
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error "See the FAQ on how to diagnose the cause, or continue without KVM by setting KVM=N (not recommended)."
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[[ "$DEBUG" != [Yy1]* ]] && exit 88
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fi
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fi
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fi
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if [[ "$KVM" != [Nn]* ]]; then
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CPU_FEATURES="kvm=on,l3-cache=on,+hypervisor"
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CLOCK="/sys/devices/system/clocksource/clocksource0/current_clocksource"
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KVM_OPTS=",accel=kvm -enable-kvm -global kvm-pit.lost_tick_policy=discard"
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if ! grep -qw "sse4_2" <<< "$flags"; then
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info "Your CPU does not have the SSE4 instruction set that Virtual DSM requires, it will be emulated..."
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[ -z "$CPU_MODEL" ] && CPU_MODEL="$DEF_MODEL"
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CPU_FEATURES+=",+ssse3,+sse4.1,+sse4.2"
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fi
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if [ -z "$CPU_MODEL" ]; then
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CPU_MODEL="host"
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CPU_FEATURES+=",migratable=no"
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fi
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if [ -f "$CLOCK" ]; then
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CLOCK=$(<"$CLOCK")
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if [[ "${CLOCK,,}" != "tsc" ]]; then
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warn "unexpected clocksource: $CLOCK"
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fi
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else
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warn "file \"$CLOCK\" cannot not found?"
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fi
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if grep -qw "svm" <<< "$flags"; then
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# AMD processor
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if grep -qw "tsc_scale" <<< "$flags"; then
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CPU_FEATURES+=",+invtsc"
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fi
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else
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# Intel processor
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vmx=$(sed -ne '/^vmx flags/s/^.*: //p' /proc/cpuinfo)
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if grep -qw "tsc_scaling" <<< "$vmx"; then
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CPU_FEATURES+=",+invtsc"
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fi
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fi
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else
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KVM_OPTS=""
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CPU_FEATURES="l3-cache=on,+hypervisor"
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if [[ "$ARCH" == "amd64" ]]; then
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KVM_OPTS=" -accel tcg,thread=multi"
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fi
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if [ -z "$CPU_MODEL" ]; then
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if [[ "$ARCH" == "amd64" ]]; then
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CPU_MODEL="max"
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CPU_FEATURES+=",migratable=no"
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else
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CPU_MODEL="$DEF_MODEL"
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fi
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fi
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CPU_FEATURES+=",+ssse3,+sse4.1,+sse4.2"
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fi
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if [ -z "$CPU_FLAGS" ]; then
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if [ -z "$CPU_FEATURES" ]; then
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CPU_FLAGS="$CPU_MODEL"
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else
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CPU_FLAGS="$CPU_MODEL,$CPU_FEATURES"
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fi
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else
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if [ -z "$CPU_FEATURES" ]; then
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CPU_FLAGS="$CPU_MODEL,$CPU_FLAGS"
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else
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CPU_FLAGS="$CPU_MODEL,$CPU_FEATURES,$CPU_FLAGS"
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fi
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fi
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if [ -z "$HOST_CPU" ]; then
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HOST_CPU=$(lscpu | grep -m 1 'Model name' | cut -f 2 -d ":" | awk '{$1=$1}1' | sed 's# @.*##g' | sed s/"(R)"//g | sed 's/[^[:alnum:] ]\+/ /g' | sed 's/ */ /g')
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fi
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if [ -n "$HOST_CPU" ]; then
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HOST_CPU="${HOST_CPU%%,*},,"
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else
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HOST_CPU="QEMU, Virtual CPU,"
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if [ "$ARCH" == "amd64" ]; then
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HOST_CPU+=" X86_64"
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else
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HOST_CPU+=" $ARCH"
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fi
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fi
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return 0
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