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feat: Emulate SSE4.2 on ARM64

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Kroese 2023-12-16 04:36:00 +01:00 committed by GitHub
parent 3f2ca67051
commit d3f77c848c
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1 changed files with 37 additions and 0 deletions
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src/cpu.sh Normal file
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#!/bin/bash
set -Eeuo pipefail
KVM_ERR=""
KVM_OPTS=""
QEMU_CPU="qemu64,+ssse3,+sse4,+sse4.1,+sse4.2"
if [ "$ARCH" == "amd64" ]; then
if [ -e /dev/kvm ] && sh -c 'echo -n > /dev/kvm' &> /dev/null; then
if ! grep -q -e vmx -e svm /proc/cpuinfo; then
KVM_ERR="(vmx/svm disabled)"
fi
else
[ -e /dev/kvm ] && KVM_ERR="(no write access)" || KVM_ERR="(device file missing)"
fi
if [ -n "$KVM_ERR" ]; then
error "KVM acceleration not detected $KVM_ERR, this will cause a major loss of performance."
error "See the FAQ on how to enable it, or skip this error by setting KVM=N (not recommended)."
[[ "$KVM" != [Nn]* ]] && [[ "$DEBUG" != [Yy1]* ]] && exit 88
[ "$CPU_MODEL" == "host"* ] && CPU_MODEL="$QEMU_CPU"
else
KVM_OPTS=",accel=kvm -enable-kvm"
fi
if [ "$CPU_MODEL" == "host" ]; then
if ! grep -qE '^flags.* (sse4_2)' /proc/cpuinfo; then
info "Your CPU does not have the SSE4.2 instruction set, it will be emulated.."
CPU_MODEL="host,+ssse3,+sse4,+sse4.1,+sse4.2"
fi
fi
else
[ "$CPU_MODEL" == "host"* ] && CPU_MODEL="$QEMU_CPU"
fi
return 0