+sub get_cpu_options {
+ my ($conf, $arch, $kvm, $machine_type, $kvm_off, $kvmver, $winversion, $gpu_passthrough) = @_;
+
+ my $cpuFlags = [];
+ my $ostype = $conf->{ostype};
+
+ my $cpu = $kvm ? "kvm64" : "qemu64";
+ if (my $cputype = $conf->{cpu}) {
+ my $cpuconf = PVE::JSONSchema::parse_property_string($cpu_fmt, $cputype)
+ or die "Cannot parse cpu description: $cputype\n";
+ $cpu = $cpuconf->{cputype};
+ $kvm_off = 1 if $cpuconf->{hidden};
+
+ if (defined(my $flags = $cpuconf->{flags})) {
+ push @$cpuFlags, split(";", $flags);
+ }
+ }
+
+ push @$cpuFlags , '+lahf_lm' if $cpu eq 'kvm64';
+
+ push @$cpuFlags , '-x2apic'
+ if $conf->{ostype} && $conf->{ostype} eq 'solaris';
+
+ push @$cpuFlags, '+sep' if $cpu eq 'kvm64' || $cpu eq 'kvm32';
+
+ push @$cpuFlags, '-rdtscp' if $cpu =~ m/^Opteron/;
+
+ if (qemu_machine_feature_enabled ($machine_type, $kvmver, 2, 3)) {
+
+ push @$cpuFlags , '+kvm_pv_unhalt' if $kvm;
+ push @$cpuFlags , '+kvm_pv_eoi' if $kvm;
+ }
+
+ add_hyperv_enlightenments($cpuFlags, $winversion, $machine_type, $kvmver, $conf->{bios}, $gpu_passthrough) if $kvm;
+
+ push @$cpuFlags, 'enforce' if $cpu ne 'host' && $kvm;
+
+ push @$cpuFlags, 'kvm=off' if $kvm_off;
+
+ if (my $cpu_vendor = $cpu_vendor_list->{$cpu}) {
+ push @$cpuFlags, "vendor=${cpu_vendor}"
+ if $cpu_vendor ne 'default';
+ } elsif ($arch ne 'aarch64') {
+ die "internal error"; # should not happen
+ }
+
+ $cpu .= "," . join(',', @$cpuFlags) if scalar(@$cpuFlags);
+
+ return ('-cpu', $cpu);
+}
+