diff options
| author | Niklas Schnelle <schnelle@linux.ibm.com> | 2020-04-28 11:54:46 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2020-05-20 10:22:51 +0200 |
| commit | e5794cf1a270d813a5b9373a6876487d4d154195 (patch) | |
| tree | b4985d95ac015bdbb63c4ce096f9a8bc3157bdde /arch/s390/include/asm/pci_clp.h | |
| parent | a1ceea67f2e5b73cebd456e7fb463b3052bc6344 (diff) | |
s390/pci: create links between PFs and VFs
On s390 PCI Virtual Functions (VFs) are scanned by firmware and are made
available to Linux via the hot-plug interface. As such the common code
path of doing the scan directly using the parent Physical Function (PF)
is not used and fenced off with the no_vf_scan attribute.
Even if the partition created the VFs itself e.g. using the sriov_numvfs
attribute of a PF, the PF/VF links thus need to be established after the
fact. To do this when a VF is plugged we scan through all functions on
the same zbus and test whether they are the parent PF in which case we
establish the necessary links.
With these links established there is now no more need to fence off
pci_iov_remove_virtfn() for pdev->no_vf_scan as the common code now
works fine.
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Link: https://lore.kernel.org/r/20200506154139.90609-3-schnelle@linux.ibm.com
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/pci_clp.h')
| -rw-r--r-- | arch/s390/include/asm/pci_clp.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/include/asm/pci_clp.h b/arch/s390/include/asm/pci_clp.h index 896ee41e23e3..eb51272dd2cc 100644 --- a/arch/s390/include/asm/pci_clp.h +++ b/arch/s390/include/asm/pci_clp.h @@ -95,7 +95,8 @@ struct clp_rsp_query_pci { u16 vfn; /* virtual fn number */ u16 : 3; u16 rid_avail : 1; - u16 : 2; + u16 is_physfn : 1; + u16 reserved1 : 1; u16 mio_addr_avail : 1; u16 util_str_avail : 1; /* utility string available? */ u16 pfgid : 8; /* pci function group id */ |