+if ! "$skip_qemu_kvm"; then
+ if [ "$cpuid" = "KVMKVMKVM" ]; then
+ echo kvm
+ elif [ "$cpuid" = "TCGTCGTCGTCG" ]; then
+ echo qemu
+ skip_lkvm=true
+ elif echo "$dmi" | grep -q 'Product Name: KVM'; then
+ echo kvm
+ skip_lkvm=true
+ elif echo "$dmi" | grep -q 'Manufacturer: KVM'; then
+ echo kvm
+ skip_lkvm=true
+ elif echo "$dmi" | grep -q 'Manufacturer: Amazon EC2' &&
+ echo "$dmi" | grep -q 'System is a virtual machine'; then
+ # This is for AWS Graviton (Arm) systems which don't have CPUID.
+ echo kvm
+ skip_lkvm=true
+ elif echo "$dmi" | grep -q 'Manufacturer: QEMU'; then
+ # The test for KVM above failed, so now we know we're
+ # not using KVM acceleration.
+ echo qemu
+ skip_lkvm=true
+ elif [ "$arch" = "arm" ] || [ "$arch" = "aarch64" ]; then
+ if [ -d "${root}/proc/device-tree" ] &&
+ ls "${root}/proc/device-tree" | grep -q "fw-cfg"; then
+ # We don't have enough information to determine if we're
+ # using KVM acceleration or not.
+ echo qemu
+ skip_lkvm=true
+ fi
+ elif [ -d ${root}/proc/device-tree/hypervisor ] &&
+ grep -q "linux,kvm" /proc/device-tree/hypervisor/compatible; then
+ # We are running as a spapr KVM guest on ppc64
+ echo kvm
+ skip_lkvm=true
+ elif use_sysctl; then
+ # SmartOS KVM
+ product=$(sysctl -n hw.product)
+ if echo "$product" | grep -q 'SmartDC HVM'; then
+ echo kvm
+ fi
+ else
+ # This is known to fail for qemu with the explicit -cpu
+ # option, since /proc/cpuinfo will not contain the QEMU
+ # string. QEMU 2.10 added a new CPUID leaf, so this
+ # problem only triggered for older QEMU
+ if have_cpuinfo && grep -q 'QEMU' "${root}/proc/cpuinfo"; then
+ echo qemu
+ fi
+ fi
+fi
+
+if ! "$skip_lkvm"; then
+ if [ "$cpuid" = "LKVMLKVMLKVM" ]; then
+ echo lkvm
+ elif [ "$arch" = "arm" ] || [ "$arch" = "aarch64" ]; then
+ if [ -d "${root}/proc/device-tree" ] &&
+ grep -q "dummy-virt" "${root}/proc/device-tree/compatible"; then
+ echo lkvm
+ fi
+ fi
+fi
+
+# Check for Docker.
+if [ -f "${root}/.dockerenv" ] || [ -f "${root}/.dockerinit" ] || \
+ grep -qF /docker/ "${root}/proc/self/cgroup" 2>/dev/null; then
+ echo docker
+fi
+
+# Check for Podman.
+if [ -e "${root}/proc/1/environ" ] &&
+ cat "${root}/proc/1/environ" | tr '\000' '\n' | grep -Eiq '^container=podman'; then
+ echo podman
+elif grep -qF /libpod- "${root}/proc/self/cgroup" 2>/dev/null; then
+ echo podman
+fi
+
+# Check ppc64 lpar, kvm or powerkvm
+
+# example /proc/cpuinfo line indicating 'not baremetal'
+# platform : pSeries
+#
+# example /proc/ppc64/lparcfg systemtype line
+# system_type=IBM pSeries (emulated by qemu)
+
+if [ "$arch" = "ppc64" ] || [ "$arch" = "ppc64le" ] ; then
+ if have_cpuinfo && grep -q 'platform.**pSeries' "${root}/proc/cpuinfo"; then
+ if grep -q 'model.*emulated by qemu' "${root}/proc/cpuinfo"; then
+ echo ibm_power-kvm
+ else
+ # Assume LPAR, now detect shared or dedicated
+ if grep -q 'shared_processor_mode=1' "${root}/proc/ppc64/lparcfg"; then
+ echo ibm_power-lpar_shared
+ else
+ echo ibm_power-lpar_dedicated
+ fi
+ # detect powerkvm?
+ fi
+ fi
+fi
+
+# Check for OpenBSD/VMM
+if [ "$cpuid" = "OpenBSDVMM58" ]; then
+ echo vmm
+fi