[19.04 FEAT] [LS1801] PCI Virtual function enablement

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Description:
The common code Linux kernel PCI bus driver performs initialization steps of PCI virtual functions (SRIOV) in an order that is incompatible with Z firmware requirements. As a result, virtual functions cannot be used properly. This item is about ensuring that PCI virtual functions can be correctly enabled in Linux.

Tentativ target ; kernel 5.0

[Frank Heimes (fheimes)]

Since the target is to have that with kernel 5.0 in disco, this ticket is not assigned to any team, but just monitored ...

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------- Comment From <email address hidden> 2019-02-19 07:08 EDT-------
This function is not fully implemented with kernel 5.0 therefore addl. backports need to be added here.

kernel 5.0 Git commits:
- Factor out sriov_add_vfs() [18f9e9d150] (+31/-13)
- Add flag so platforms can skip VF scanning [aff68a5a62] (+7/-0)
- s390/pci: skip VF scanning [7dc20ab1b9] (+3/-0)

kernel 5.1 Git commits
-- commit cfbb4a7ab6bd5df7aca826b92ebb3565efd3d801
s390/pci: map IOV resources
Map IOV resources such that pci common code recognizes
the IOV capability of PFs.

-- commit e8e25a7718cf64701ddf7f7b2e31c79815b613f1
s390/pci: improve bar check
Improve the bar check in pci_iomap_range to cover functions

[Seth Forshee (sforshee)]

The two patches from 5.1 have been applied to our 5.0 kernel tree.

[Frank Heimes (fheimes)]

Just double-checked if everything ("PCI/IOV: Factor out sriov_add_vfs()", "s390/pci: skip VF scanning", "s390/pci: map IOV resources" and "s390/pci: improve bar check") landed in disco-proposed kernel "Ubuntu-5.0.0-7.8". Look good - like expected ("18f9e9d", "7dc20ab", "9535cec" and "4a490e2").

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 5.0.0-7.8

---------------
linux (5.0.0-7.8) disco; urgency=medium

  * linux: 5.0.0-7.8 -proposed tracker (LP: #1818519)

  * Packaging resync (LP: #1786013)
    - [Packaging] update helper scripts

  * unnecessary request_queue freeze (LP: #1815733)
    - block: avoid setting nr_requests to current value
    - block: avoid setting none scheduler if it's already none

  * Miscellaneous Ubuntu changes
    - SAUCE: selftests: net: Don't fail test_vxlan_under_vrf on xfail
    - update dkms package versions

  [ Upstream Kernel Changes ]

  * Rebase to v5.0

 -- Seth Forshee <email address hidden> Mon, 04 Mar 2019 08:46:10 -0600

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------- Comment From <email address hidden> 2019-03-15 06:24 EDT-------
IBM Bugzilla status -> closed, Fix Released for disco