vIOMMU enables the option to passthrough pci devices to guest-vms
in guest-vms for nested Virtualisation.
Signed-off-by: Markus Frank <m.fr...@proxmox.com>
---
Changed the machine parameter to allow multiple machine-specific
parameters via property_string, but also allow old configs (via
default_key)
PVE/API2/Qemu.pm | 7 ++---
PVE/QemuConfig.pm | 3 ++-
PVE/QemuServer.pm | 55 ++++++++++++++++++++++++++++++++++++---
PVE/QemuServer/Machine.pm | 6 +++--
4 files changed, 62 insertions(+), 9 deletions(-)
diff --git a/PVE/API2/Qemu.pm b/PVE/API2/Qemu.pm
index 3ec31c2..fe94c74 100644
--- a/PVE/API2/Qemu.pm
+++ b/PVE/API2/Qemu.pm
@@ -970,12 +970,13 @@ __PACKAGE__->register_method({
if ((!defined($conf->{vmgenid}) || $conf->{vmgenid} eq '1')
&& $arch ne 'aarch64') {
$conf->{vmgenid} = PVE::QemuServer::generate_uuid();
}
-
- my $machine = $conf->{machine};
+ my $machine_conf =
PVE::QemuServer::parse_machine($conf->{machine});
+ my $machine = $machine_conf->{type};
if (!$machine || $machine =~ m/^(?:pc|q35|virt)$/) {
# always pin Windows' machine version on create, they
get to easily confused
if (PVE::QemuServer::windows_version($conf->{ostype})) {
- $conf->{machine} =
PVE::QemuServer::windows_get_pinned_machine_version($machine);
+ $machine_conf->{type} =
PVE::QemuServer::windows_get_pinned_machine_version($machine);
+ $conf->{machine} =
print_property_string($machine_conf);
}
}
diff --git a/PVE/QemuConfig.pm b/PVE/QemuConfig.pm
index 482c7ab..f8155c4 100644
--- a/PVE/QemuConfig.pm
+++ b/PVE/QemuConfig.pm
@@ -433,7 +433,8 @@ sub __snapshot_rollback_hook {
} else {
# Note: old code did not store 'machine', so we try to be smart
# and guess the snapshot was generated with kvm 1.4 (pc-i440fx-1.4).
- $data->{forcemachine} = $conf->{machine} || 'pc-i440fx-1.4';
+ my $machine_conf = PVE::QemuServer::parse_machine($conf->{machine});
+ $data->{forcemachine} = $machine_conf->{type} || 'pc-i440fx-1.4';
# we remove the 'machine' configuration if not explicitly specified
# in the original config.
diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index c706653..b9f74dd 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -111,6 +111,24 @@
PVE::JSONSchema::register_standard_option('pve-qm-stateuri', {
optional => 1,
});
+my $machine_fmt = {
+ type => {
+ default_key => 1,
+ type => 'string',
+ description => "Specifies the Qemu machine type.",
+ pattern =>
'(pc|pc(-i440fx)?-\d+(\.\d+)+(\+pve\d+)?(\.pxe)?|q35|pc-q35-\d+(\.\d+)+(\+pve\d+)?(\.pxe)?|virt(?:-\d+(\.\d+)+)?(\+pve\d+)?)',
+ format_description => "type",
+ maxLength => 40,
+ optional => 1,
+ },
+ viommu => {
+ type => 'boolean',
+ description => "enable guest vIOMMU (needs kvm to be enabled and q35 to
be set as machine)",
+ default => 0,
+ optional => 1,
+ },
+};
+
PVE::JSONSchema::register_standard_option('pve-qemu-machine', {
description => "Specifies the Qemu machine type.",
type => 'string',
@@ -627,7 +645,12 @@ EODESCR
pattern => $PVE::QemuServer::CPUConfig::qemu_cmdline_cpu_re,
format_description => 'QEMU -cpu parameter'
},
- machine => get_standard_option('pve-qemu-machine'),
+ machine => {
+ description => "Specifies the Qemu machine type.",
+ type => 'string',
+ optional => 1,
+ format => $machine_fmt,
+ },
arch => {
description => "Virtual processor architecture. Defaults to the host.",
optional => 1,
@@ -2095,6 +2118,16 @@ sub parse_watchdog {
return $res;
}
+sub parse_machine {
+ my ($value) = @_;
+
+ return if !$value;
+
+ my $res = eval { parse_property_string($machine_fmt, $value) };
+ warn $@ if $@;
+ return $res;
+}
+
sub parse_guest_agent {
my ($conf) = @_;
@@ -2166,8 +2199,9 @@ sub qemu_created_version_fixups {
# check if we need to apply some handling for VMs that always use the
latest machine version but
# had a machine version transition happen that affected HW such that,
e.g., an OS config change
# would be required (we do not want to pin machine version for non-windows
OS type)
+ my $machine_conf = parse_machine($conf->{machine});
if (
- (!defined($conf->{machine}) || $conf->{machine} =~
m/^(?:pc|q35|virt)$/) # non-versioned machine
+ (!defined($machine_conf->{type}) || $machine_conf->{type} =~
m/^(?:pc|q35|virt)$/) # non-versioned machine
&& (!defined($meta->{'creation-qemu'}) ||
!min_version($meta->{'creation-qemu'}, 6, 1)) # created before 6.1
&& (!$forced_vers || min_version($forced_vers, 6, 1)) # handle
snapshot-rollback/migrations
&& min_version($kvmver, 6, 1) # only need to apply the change since 6.1
@@ -3267,7 +3301,8 @@ sub windows_get_pinned_machine_version {
sub get_vm_machine {
my ($conf, $forcemachine, $arch, $add_pve_version, $kvmversion) = @_;
- my $machine = $forcemachine || $conf->{machine};
+ my $machine_conf = parse_machine($conf->{machine});
+ my $machine = $forcemachine || $machine_conf->{type};
if (!$machine || $machine =~ m/^(?:pc|q35|virt)$/) {
$kvmversion //= kvm_user_version();
@@ -3482,6 +3517,8 @@ sub config_to_command {
my $kvm = $conf->{kvm};
my $nodename = nodename();
+ my $machine_conf = parse_machine($conf->{machine});
+
my $arch = get_vm_arch($conf);
my $kvm_binary = get_command_for_arch($arch);
my $kvmver = kvm_user_version($kvm_binary);
@@ -3535,6 +3572,14 @@ sub config_to_command {
my $use_old_bios_files = undef;
($use_old_bios_files, $machine_type) =
qemu_use_old_bios_files($machine_type);
+ if ($machine_conf->{viommu} && (!$kvm || !$q35)) {
+ die "to use vIOMMU please enable kvm and set the machine type to q35";
+ }
+
+ if ($machine_conf->{viommu}) {
+ push @$devices, '-device', 'intel-iommu,intremap=on,caching-mode=on';
+ }
+
push @$cmd, $kvm_binary;
push @$cmd, '-id', $vmid;
@@ -4080,6 +4125,10 @@ sub config_to_command {
}
push @$machineFlags, "type=${machine_type_min}";
+ if ($machine_conf->{viommu}) {
+ push @$machineFlags, 'kernel-irqchip=split';
+ }
+
push @$cmd, @$devices;
push @$cmd, '-rtc', join(',', @$rtcFlags) if scalar(@$rtcFlags);
push @$cmd, '-machine', join(',', @$machineFlags) if
scalar(@$machineFlags);
diff --git a/PVE/QemuServer/Machine.pm b/PVE/QemuServer/Machine.pm
index d9429ed..33f9a64 100644
--- a/PVE/QemuServer/Machine.pm
+++ b/PVE/QemuServer/Machine.pm
@@ -15,7 +15,8 @@ our $PVE_MACHINE_VERSION = {
sub machine_type_is_q35 {
my ($conf) = @_;
- return $conf->{machine} && ($conf->{machine} =~ m/q35/) ? 1 : 0;
+ my $machine_conf = PVE::QemuServer::parse_machine($conf->{machine});
+ return $machine_conf->{type} && ($machine_conf->{type} =~ m/q35/) ? 1 : 0;
}
sub current_from_query_machines {
@@ -120,7 +121,8 @@ sub qemu_machine_pxe {
my $machine = get_current_qemu_machine($vmid);
- if ($conf->{machine} && $conf->{machine} =~ m/\.pxe$/) {
+ my $machine_conf = PVE::QemuServer::parse_machine($conf->{machine});
+ if ($conf->{machine} && $machine_conf->{type} =~ m/\.pxe$/) {
$machine .= '.pxe';
}
--
2.30.2
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