[Bug 216891] New: The interface for creating SR-IOV VF doesn't exist

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216891

            Bug ID: 216891
           Summary: The interface for creating SR-IOV VF doesn't exist
           Product: Virtualization
           Version: unspecified
    Kernel Version: 6.2.0-rc1
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: kvm
          Assignee: virtualization_kvm@kernel-bugs.osdl.org
          Reporter: lixiao.yang@intel.com
        Regression: No

Created attachment 303532
  --> https://bugzilla.kernel.org/attachment.cgi?id=303532&action=edit
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

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