package PVE::QemuServer::PCI;
+use PVE::JSONSchema;
+use PVE::SysFSTools;
+
use base 'Exporter';
our @EXPORT_OK = qw(
print_pci_addr
print_pcie_addr
print_pcie_root_port
+parse_hostpci
);
+our $MAX_HOSTPCI_DEVICES = 16;
+
+my $PCIRE = qr/([a-f0-9]{4}:)?[a-f0-9]{2}:[a-f0-9]{2}(?:\.[a-f0-9])?/;
+my $hostpci_fmt = {
+ host => {
+ default_key => 1,
+ type => 'string',
+ pattern => qr/$PCIRE(;$PCIRE)*/,
+ format_description => 'HOSTPCIID[;HOSTPCIID2...]',
+ description => <<EODESCR,
+Host PCI device pass through. The PCI ID of a host's PCI device or a list
+of PCI virtual functions of the host. HOSTPCIID syntax is:
+
+'bus:dev.func' (hexadecimal numbers)
+
+You can us the 'lspci' command to list existing PCI devices.
+EODESCR
+ },
+ rombar => {
+ type => 'boolean',
+ description => "Specify whether or not the device's ROM will be visible in the guest's memory map.",
+ optional => 1,
+ default => 1,
+ },
+ romfile => {
+ type => 'string',
+ pattern => '[^,;]+',
+ format_description => 'string',
+ description => "Custom pci device rom filename (must be located in /usr/share/kvm/).",
+ optional => 1,
+ },
+ pcie => {
+ type => 'boolean',
+ description => "Choose the PCI-express bus (needs the 'q35' machine model).",
+ optional => 1,
+ default => 0,
+ },
+ 'x-vga' => {
+ type => 'boolean',
+ description => "Enable vfio-vga device support.",
+ optional => 1,
+ default => 0,
+ },
+ 'mdev' => {
+ type => 'string',
+ format_description => 'string',
+ pattern => '[^/\.:]+',
+ optional => 1,
+ description => <<EODESCR
+The type of mediated device to use.
+An instance of this type will be created on startup of the VM and
+will be cleaned up when the VM stops.
+EODESCR
+ }
+};
+PVE::JSONSchema::register_format('pve-qm-hostpci', $hostpci_fmt);
+
+our $hostpcidesc = {
+ optional => 1,
+ type => 'string', format => 'pve-qm-hostpci',
+ description => "Map host PCI devices into guest.",
+ verbose_description => <<EODESCR,
+Map host PCI devices into guest.
+
+NOTE: This option allows direct access to host hardware. So it is no longer
+possible to migrate such machines - use with special care.
+
+CAUTION: Experimental! User reported problems with this option.
+EODESCR
+};
+PVE::JSONSchema::register_standard_option("pve-qm-hostpci", $hostpcidesc);
+
my $pci_addr_map;
sub get_pci_addr_map {
$pci_addr_map = {
return $res;
}
+sub parse_hostpci {
+ my ($value) = @_;
+
+ return undef if !$value;
+
+ my $res = PVE::JSONSchema::parse_property_string($hostpci_fmt, $value);
+
+ my @idlist = split(/;/, $res->{host});
+ delete $res->{host};
+ foreach my $id (@idlist) {
+ my $devs = PVE::SysFSTools::lspci($id);
+ die "no PCI device found for '$id'\n" if !scalar(@$devs);
+ push @{$res->{pciid}}, @$devs;
+ }
+ return $res;
+}
+
+sub print_hostpci_devices {
+ my ($conf, $devices, $winversion, $q35, $bridges, $arch, $machine_type) = @_;
+
+ my $kvm_off = 0;
+ my $gpu_passthrough = 0;
+
+ for (my $i = 0; $i < $MAX_HOSTPCI_DEVICES; $i++) {
+ my $id = "hostpci$i";
+ my $d = parse_hostpci($conf->{$id});
+ next if !$d;
+
+ if (my $pcie = $d->{pcie}) {
+ die "q35 machine model is not enabled" if !$q35;
+ # win7 wants to have the pcie devices directly on the pcie bus
+ # instead of in the root port
+ if ($winversion == 7) {
+ $pciaddr = print_pcie_addr("${id}bus0");
+ } else {
+ # add more root ports if needed, 4 are present by default
+ # by pve-q35 cfgs, rest added here on demand.
+ if ($i > 3) {
+ push @$devices, '-device', print_pcie_root_port($i);
+ }
+ $pciaddr = print_pcie_addr($id);
+ }
+ } else {
+ $pciaddr = print_pci_addr($id, $bridges, $arch, $machine_type);
+ }
+
+ my $xvga = '';
+ if ($d->{'x-vga'}) {
+ $xvga = ',x-vga=on' if !($conf->{bios} && $conf->{bios} eq 'ovmf');
+ $kvm_off = 1;
+ $vga->{type} = 'none' if !defined($conf->{vga});
+ $gpu_passthrough = 1;
+ }
+
+ my $pcidevices = $d->{pciid};
+ my $multifunction = 1 if @$pcidevices > 1;
+
+ my $sysfspath;
+ if ($d->{mdev} && scalar(@$pcidevices) == 1) {
+ my $pci_id = $pcidevices->[0]->{id};
+ my $uuid = PVE::SysFSTools::generate_mdev_uuid($vmid, $i);
+ $sysfspath = "/sys/bus/pci/devices/$pci_id/$uuid";
+ } elsif ($d->{mdev}) {
+ warn "ignoring mediated device '$id' with multifunction device\n";
+ }
+
+ my $j=0;
+ foreach my $pcidevice (@$pcidevices) {
+ my $devicestr = "vfio-pci";
+
+ if ($sysfspath) {
+ $devicestr .= ",sysfsdev=$sysfspath";
+ } else {
+ $devicestr .= ",host=$pcidevice->{id}";
+ }
+
+ my $mf_addr = $multifunction ? ".$j" : '';
+ $devicestr .= ",id=${id}${mf_addr}${pciaddr}${mf_addr}";
+
+ if ($j == 0) {
+ $devicestr .= ',rombar=0' if defined($d->{rombar}) && !$d->{rombar};
+ $devicestr .= "$xvga";
+ $devicestr .= ",multifunction=on" if $multifunction;
+ $devicestr .= ",romfile=/usr/share/kvm/$d->{romfile}" if $d->{romfile};
+ }
+
+ push @$devices, '-device', $devicestr;
+ $j++;
+ }
+ }
+
+ return ($kvm_off, $gpu_passthrough);
+}
+
1;
projects / qemu-server.git / blobdiff