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add mediated devices support

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with this, we are able to create and use mediated devices,
which include Intel GVT-g (aka KVMGT) and Nvidia vGPUs, and probably more
types of devices in the future

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
This commit is contained in:
Dominik Csapak 2018-11-20 17:13:39 +01:00 committed by Thomas Lamprecht
parent e196200ab8
commit 6ab45bd7ff
1 changed files with 49 additions and 5 deletions
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54
PVE/QemuServer.pm
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@ -1244,6 +1244,17 @@ EODESCR
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);
@ -3539,6 +3550,15 @@ sub config_to_command {
}
my $pcidevices = $d->{pciid};
my $multifunction = 1 if @$pcidevices > 1;
my $sysfspath;
if ($d->{mdev} && scalar(@$pcidevices) == 1) {
my $id = $pcidevices->[0]->{id};
my $function = $pcidevices->[0]->{function};
my $uuid = PVE::SysFSTools::generate_mdev_uuid($vmid, $i);
$sysfspath = "/sys/bus/pci/devices/0000:$id.$function/$uuid";
} elsif ($d->{mdev}) {
warn "ignoring mediated device with multifunction device\n";
}
my $j=0;
foreach my $pcidevice (@$pcidevices) {
@ -3547,7 +3567,13 @@ sub config_to_command {
$id .= ".$j" if $multifunction;
my $addr = $pciaddr;
$addr .= ".$j" if $multifunction;
my $devicestr = "vfio-pci,host=$pcidevice->{id}.$pcidevice->{function},id=$id$addr";
my $devicestr = "vfio-pci";
if ($sysfspath) {
$devicestr .= ",sysfsdev=$sysfspath";
} else {
$devicestr .= ",host=$pcidevice->{id}.$pcidevice->{function}";
}
$devicestr .= ",id=$id$addr";
if($j == 0){
$devicestr .= "$rombar$xvga";
@ -5142,10 +5168,16 @@ sub vm_start {
my $info = PVE::SysFSTools::pci_device_info("0000:$pciid");
die "IOMMU not present\n" if !PVE::SysFSTools::check_iommu_support();
die "no pci device info for device '$pciid'\n" if !$info;
die "can't unbind/bind pci group to vfio '$pciid'\n"
if !PVE::SysFSTools::pci_dev_group_bind_to_vfio($pciid);
die "can't reset pci device '$pciid'\n"
if $info->{has_fl_reset} and !PVE::SysFSTools::pci_dev_reset($info);
if ($d->{mdev}) {
my $uuid = PVE::SysFSTools::generate_mdev_uuid($vmid, $i);
PVE::SysFSTools::pci_create_mdev_device($pciid, $uuid, $d->{mdev});
} else {
die "can't unbind/bind pci group to vfio '$pciid'\n"
if !PVE::SysFSTools::pci_dev_group_bind_to_vfio($pciid);
die "can't reset pci device '$pciid'\n"
if $info->{has_fl_reset} and !PVE::SysFSTools::pci_dev_reset($info);
}
}
}
@ -5385,6 +5417,18 @@ sub vm_stop_cleanup {
unlink "/var/run/qemu-server/${vmid}.$ext";
}
foreach my $key (keys %$conf) {
next if $key !~ m/^hostpci(\d+)$/;
my $hostpciindex = $1;
my $d = parse_hostpci($conf->{$key});
my $uuid = PVE::SysFSTools::generate_mdev_uuid($vmid, $hostpciindex);
foreach my $pci (@{$d->{pciid}}) {
my $pciid = $pci->{id} . "." . $pci->{function};
PVE::SysFSTools::pci_cleanup_mdev_device($pciid, $uuid);
}
}
vmconfig_apply_pending($vmid, $conf, $storecfg) if $apply_pending_changes;
};
warn $@ if $@; # avoid errors - just warn