[pve-devel] [PATCH qemu-server] pci: do not reserve pci-ids for mediated devices

Dominik Csapak d.csapak at proxmox.com
Mon Nov 15 14:07:35 CET 2021


else a user cannot use more than one mdev per card per host.
We do not need to reserve them at all, since sysfs will error out
on creation/reuse anyway

Signed-off-by: Dominik Csapak <d.csapak at proxmox.com>
---
 PVE/QemuServer.pm | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 8c55dbc..580af9e 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -5501,7 +5501,12 @@ sub vm_start_nolock {
 	$pci_devices->{$i} = parse_hostpci($dev);
     }
 
-    my $pci_id_list = [ map { $_->{id} } map { $_->{pciid}->@* } values $pci_devices->%* ];
+    # do not reserve pciid for mediated devices, sysfs will error out for duplicate assignment
+    my $real_pci_devices = [ grep { !(defined($_->{mdev}) && scalar($_->{pciid}->@*) == 1) } values $pci_devices->%* ];
+
+    # map to a flat list of pci ids
+    my $pci_id_list = [ map { $_->{id} } map { $_->{pciid}->@* } $real_pci_devices->@* ];
+
     # reserve all PCI IDs before actually doing anything with them
     PVE::QemuServer::PCI::reserve_pci_usage($pci_id_list, $vmid, $start_timeout);
 
-- 
2.30.2





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