Bug 216891

Summary:	The interface for creating SR-IOV VF doesn't exist
Product:	Virtualization	Reporter:	Yang Lixiao (lixiao.yang)
Component:	kvm	Assignee:	virtualization_kvm
Status:	NEW ---
Severity:	high	CC:	gordon.jin, lixiao.yang, xudong.hao
Priority:	P1
Hardware:	Intel
OS:	Linux
Kernel Version:	6.2.0-rc1	Subsystem:
Regression:	Yes	Bisected commit-id:
Attachments:	kernel config

Description Yang Lixiao 2023-01-06 01:38:21 UTC

Created attachment 303532 [details]
kernel config

Environment:
CPU Architecture: x86_64
Host OS: Red Hat Enterprise Linux 8.4 (Ootpa)
NIC: 98:00.0 Ethernet controller: Intel Corporation Ethernet Controller X710 for 10GbE SFP+ (rev 02)
Host kernel: 6.2.0-rc1
gcc: gcc version 8.4.1
Host kernel source: https://git.kernel.org/pub/scm/virt/kvm/kvm.git
Branch: next
Commit: fc471e83

Qemu source: https://git.qemu.org/git/qemu.git
Branch: master
Commit: cb9c6a8e


Bug Detailed Description:
The interface for creating SR-IOV VF doesn't exist, i.e. /sys/bus/pci/devices/0000:98:00.0/sriov_numvfs doesn't exist.
This issue didn't happen in my last test with host kernel 6.1.0-rc4,kvm commit 549a715b and qemu commit c15dc499.

Reproducing Steps:
Try to create 2 VFs
echo 2 > /sys/bus/pci/devices/0000:98:00.0/sriov_numvfs
 

Actual Result:
Error log: 
No such file:/sys/bus/pci/devices/0000:98:00.0/sriov_numvfs

Expected Result:
2 VFs successfully created