[PATCH v4 0/7] Disable VF's memory space on updating IOV BARs

[Bjorn Helgaas]

On Mon, Nov 28, 2016 at 10:13:41PM -0600, Bjorn Helgaas wrote:
> This is a v4 of Gavin's series for handling VF BAR updates.  The
> important piece is the first patch ("PCI: Do any VF BAR updates before
> enabling the BARs").  That makes sure that if we update VF BARs, we do
> it before enabling the VFs, and that is unchanged from v3.
> 
> The second patch in Gavin's series ("PCI: Disable VF's memory space on
> updating IOV BAR in pci_update_resource()") temporarily disabled VF
> memory space during an update.  Since the first patch does the update
> before enabling VFs, this case shouldn't happen in practice.
> 
> But even if we want to update a VF BAR while VF memory space is
> enabled, I think temporarily disabling it is wrong.  So I replaced
> the second patch with a few patches that make that such an update
> fail.
> 
> Please comment.  These are on my pci/virtualization branch.
> 
> Changelog
> =========
> v4:
>   * Don't disable VF's memory space when IOV BARs are updated; fail the
>     update instead. 
>   * Split IOV BAR updates from standard BAR updates so IOV updates can go
>     in pci/iov.c.
>   * Remove pci_resource_bar() and pci_iov_resource_bar() (the relevant
>     code is simpler when inlined into the callers).
>   * Cleanup IORESOURCE_ROM_ENABLE usage.
>   * Add comments about why ROMs are updated differently.
> v3:
>   * Disable VF's memory space when IOV BARs are updated in
>     pcibios_sriov_enable().
> v2:
>   * Added one patch calling pcibios_sriov_enable() before the VF
>     and VF BARs are enabled.
> 
> ---
> 
> Bjorn Helgaas (6):
>       PCI: Ignore BAR updates on virtual functions
>       PCI: Separate VF BAR updates from standard BAR updates
>       PCI: Don't update VF BARs while VF memory space is enabled
>       PCI: Remove pci_resource_bar() and pci_iov_resource_bar()
>       PCI: Decouple IORESOURCE_ROM_ENABLE and PCI_ROM_ADDRESS_ENABLE
>       PCI: Add comments about ROM BAR updating
> 
> Gavin Shan (1):
>       PCI: Do any VF BAR updates before enabling the BARs
> 
> 
>  drivers/pci/iov.c       |   69 +++++++++++++++++++++++++++++++++++++----------
>  drivers/pci/pci.c       |   34 -----------------------
>  drivers/pci/pci.h       |    7 +----
>  drivers/pci/probe.c     |    3 +-
>  drivers/pci/rom.c       |    5 +++
>  drivers/pci/setup-res.c |   37 ++++++++++++++++++-------
>  6 files changed, 88 insertions(+), 67 deletions(-)

I applied this on pci/virtualization for v4.10.