From d966250e93c1194c0a4c775e08a8e23f2ef66cf8 Mon Sep 17 00:00:00 2001 From: Akihiko Odaki Date: Thu, 16 Jan 2025 18:00:55 +0900 Subject: [PATCH] s390x/pci: Allow plugging SR-IOV devices The guest cannot use VFs due to the lack of multifunction support but can use PFs. Signed-off-by: Akihiko Odaki Message-Id: <20250116-reuse-v20-4-7cb370606368@daynix.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/s390x/s390-pci-bus.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c index 8c5eb69f7d..c396d55c72 100644 --- a/hw/s390x/s390-pci-bus.c +++ b/hw/s390x/s390-pci-bus.c @@ -974,7 +974,14 @@ static void s390_pcihost_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev, if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { PCIDevice *pdev = PCI_DEVICE(dev); - if (pdev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { + /* + * Multifunction is not supported due to the lack of CLP. However, + * do not check for multifunction capability for SR-IOV devices because + * SR-IOV devices automatically add the multifunction capability whether + * the user intends to use the functions other than the PF. + */ + if (pdev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION && + !pdev->exp.sriov_cap) { error_setg(errp, "multifunction not supported in s390"); return; } -- 2.30.2