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[GIT PULL] PCI fixes for v4.5

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  [GIT PULL] PCI fixes for v4.5 Bjorn Helgaas <helgaas@kernel.org> - 2016-02-27 16:20 +0100
    Re: [GIT PULL] PCI fixes for v4.5 Linus Torvalds <torvalds@linux-foundation.org> - 2016-02-27 19:30 +0100
      Re: [GIT PULL] PCI fixes for v4.5 Bjorn Helgaas <helgaas@kernel.org> - 2016-02-27 21:20 +0100

#1345031 — [GIT PULL] PCI fixes for v4.5

Hi Linus,

The big chunk here is the paravirtual front-end for Linux guests of a
Microsoft Hyper-V VM.  It's new, so no risk of regressions to pci-hyperv
itself.  It does include minor changes to common code, but they are
low-risk.

This also reverts a few pieces of the recent IOAPIC hotplug work because
they caused a regression for existing drivers that require IRQs to be
enabled for upstream bridges.

Finally, explicitly restrict the MVEBU driver to 32-bit ARM because it uses
some PCI glue only available there.  It depends on ARCH_MVEBU, which used
to be 32-bit ARM only but is now becoming available for 64-bit ARM.

Bjorn


The following changes since commit 0cf1337e0b83c16de4e7e98dad3a6afce6043fea:

  PCI: rcar: Add device tree support for r8a7793 (2016-02-05 14:13:53 -0600)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git tags/pci-v4.5-fixes-2

for you to fetch changes up to 2f8f01f7e495901042339a333d4385ed5b1e426a:

  Merge branch 'pci/host-hv' into for-linus (2016-02-27 08:52:36 -0600)

----------------------------------------------------------------
PCI updates for v4.5:

  Enumeration
    Revert x86 pcibios_alloc_irq() to fix regression (Bjorn Helgaas)

  Marvell MVEBU host bridge driver
    Restrict build to 32-bit ARM (Thierry Reding)

  Microsoft Hyper-V host bridge driver
    Add paravirtual front-end for guests of Microsoft Hyper-V VMs (Jake Oshins)

----------------------------------------------------------------
Bjorn Helgaas (4):
      Revert "x86/PCI: Don't alloc pcibios-irq when MSI is enabled"
      Revert "PCI: Add helpers to manage pci_dev->irq and pci_dev->irq_managed"
      Revert "PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()"
      Merge branch 'pci/host-hv' into for-linus

Jake Oshins (3):
      PCI: Add fwnode_handle to x86 pci_sysdata
      PCI: Look up IRQ domain by fwnode_handle
      PCI: hv: Add paravirtual PCI front-end for Microsoft Hyper-V VMs

Thierry Reding (1):
      PCI: mvebu: Restrict build to 32-bit ARM

 MAINTAINERS                    |    1 +
 arch/x86/include/asm/pci.h     |   15 +
 arch/x86/include/asm/pci_x86.h |    2 +
 arch/x86/pci/common.c          |   26 +-
 arch/x86/pci/intel_mid_pci.c   |    9 +-
 arch/x86/pci/irq.c             |   23 +-
 drivers/acpi/pci_irq.c         |   17 +-
 drivers/pci/Kconfig            |    7 +
 drivers/pci/host/Kconfig       |    1 +
 drivers/pci/host/Makefile      |    1 +
 drivers/pci/host/pci-hyperv.c  | 2346 ++++++++++++++++++++++++++++++++++++++++
 drivers/pci/probe.c            |   15 +
 include/linux/pci.h            |   21 +-
 13 files changed, 2437 insertions(+), 47 deletions(-)
 create mode 100644 drivers/pci/host/pci-hyperv.c

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#1345056

On Sat, Feb 27, 2016 at 7:14 AM, Bjorn Helgaas <helgaas@kernel.org> wrote:
>
> The big chunk here is the paravirtual front-end for Linux guests of a
> Microsoft Hyper-V VM.  It's new, so no risk of regressions to pci-hyperv
> itself.  It does include minor changes to common code, but they are
> low-risk.

I really don't want to take new features like this that change
existing code when I'm about to do a rc6.

I've done late hardware-enabling pulls before with new drivers etc,
but then they are meant to enable consumer hardware that people would
have trouble getting Linux installed on etc. A paravirt Hyper-V VM
install doesn't really count as that kind of "we need to get this in
quickly out of the normal development model".

I didn't check, but can you peel off that part if it's at the top and
just send me the actual bugfixes?

                 Linus

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#1345081

On Sat, Feb 27, 2016 at 10:22:04AM -0800, Linus Torvalds wrote:
> On Sat, Feb 27, 2016 at 7:14 AM, Bjorn Helgaas <helgaas@kernel.org> wrote:
> >
> > The big chunk here is the paravirtual front-end for Linux guests of a
> > Microsoft Hyper-V VM.  It's new, so no risk of regressions to pci-hyperv
> > itself.  It does include minor changes to common code, but they are
> > low-risk.
> 
> I really don't want to take new features like this that change
> existing code when I'm about to do a rc6.
> 
> I've done late hardware-enabling pulls before with new drivers etc,
> but then they are meant to enable consumer hardware that people would
> have trouble getting Linux installed on etc. A paravirt Hyper-V VM
> install doesn't really count as that kind of "we need to get this in
> quickly out of the normal development model".
> 
> I didn't check, but can you peel off that part if it's at the top and
> just send me the actual bugfixes?

Of course!  The Hyper-V stuff was the top-most merge, so I dropped
that and added a new tag, pci-v4.5-fixes-3, with just the fixes.  Here
it is:


The following changes since commit 0cf1337e0b83c16de4e7e98dad3a6afce6043fea:

  PCI: rcar: Add device tree support for r8a7793 (2016-02-05 14:13:53 -0600)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git tags/pci-v4.5-fixes-3

for you to fetch changes up to 61d9e854dfb91b46b99ffd3d31fc7d45d2b95f31:

  PCI: mvebu: Restrict build to 32-bit ARM (2016-02-27 08:52:20 -0600)

----------------------------------------------------------------
PCI updates for v4.5:

  Enumeration
    Revert x86 pcibios_alloc_irq() to fix regression (Bjorn Helgaas)

  Marvell MVEBU host bridge driver
    Restrict build to 32-bit ARM (Thierry Reding)

----------------------------------------------------------------
Bjorn Helgaas (3):
      Revert "x86/PCI: Don't alloc pcibios-irq when MSI is enabled"
      Revert "PCI: Add helpers to manage pci_dev->irq and pci_dev->irq_managed"
      Revert "PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()"

Thierry Reding (1):
      PCI: mvebu: Restrict build to 32-bit ARM

 arch/x86/include/asm/pci_x86.h |  2 ++
 arch/x86/pci/common.c          | 26 ++++++++++----------------
 arch/x86/pci/intel_mid_pci.c   |  9 +++------
 arch/x86/pci/irq.c             | 23 +++++++++++++++++++----
 drivers/acpi/pci_irq.c         | 17 +++++++++++++----
 drivers/pci/host/Kconfig       |  1 +
 include/linux/pci.h            | 17 -----------------
 7 files changed, 48 insertions(+), 47 deletions(-)

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