linux.git/drivers/vfio/pci, branch v3.19

vfio-pci: Fix the check on pci device type in vfio_pci_probe()

2015-01-07T17:29:11+00:00

Current vfio-pci just supports normal pci device, so vfio_pci_probe() will
return if the pci device is not a normal device. While current code makes a
mistake. PCI_HEADER_TYPE is the offset in configuration space of the device
type, but we use this value to mask the type value.

This patch fixs this by do the check directly on the pci_dev->hdr_type.

Signed-off-by: Wei Yang 
Signed-off-by: Alex Williamson 
Cc: stable@vger.kernel.org # v3.6+

Merge tag 'vfio-v3.19-rc1' of git://github.com/awilliam/linux-vfio

2014-12-17T18:44:22+00:00

Pull VFIO updates from Alex Williamson:
 - s390 support (Frank Blaschka)
 - Enable iommu-type1 for ARM SMMU (Will Deacon)

* tag 'vfio-v3.19-rc1' of git://github.com/awilliam/linux-vfio:
  drivers/vfio: allow type-1 IOMMU instantiation on top of an ARM SMMU
  vfio: make vfio run on s390

PCI/MSI: Rename write_msi_msg() to pci_write_msi_msg()

2014-11-23T12:01:45+00:00

Rename write_msi_msg() to pci_write_msi_msg() to mark it as PCI
specific.

Signed-off-by: Jiang Liu 
Cc: Bjorn Helgaas 
Cc: Grant Likely 
Cc: Marc Zyngier 
Cc: Yingjoe Chen 
Cc: Yijing Wang 
Signed-off-by: Thomas Gleixner

vfio: make vfio run on s390

2014-11-07T16:52:22+00:00

add Kconfig switch to hide INTx
add Kconfig switch to let vfio announce PCI BARs are not mapable

Signed-off-by: Frank Blaschka 
Signed-off-by: Alex Williamson

Merge tag 'vfio-v3.18-rc1' of git://github.com/awilliam/linux-vfio

2014-10-11T10:49:24+00:00

Pull VFIO updates from Alex Williamson:
 - Nested IOMMU extension to type1 (Will Deacon)
 - Restore MSIx message before enabling (Gavin Shan)
 - Fix remove path locking (Alex Williamson)

* tag 'vfio-v3.18-rc1' of git://github.com/awilliam/linux-vfio:
  vfio-pci: Fix remove path locking
  drivers/vfio: Export vfio_spapr_iommu_eeh_ioctl() with GPL
  vfio/pci: Restore MSIx message prior to enabling
  PCI: Export MSI message relevant functions
  vfio/iommu_type1: add new VFIO_TYPE1_NESTING_IOMMU IOMMU type
  iommu: introduce domain attribute for nesting IOMMUs

vfio-pci: Fix remove path locking

2014-09-29T23:18:39+00:00

Locking both the remove() and release() path results in a deadlock
that should have been obvious.  To fix this we can get and hold the
vfio_device reference as we evaluate whether to do a bus/slot reset.
This will automatically block any remove() calls, allowing us to
remove the explict lock.  Fixes 61d792562b53.

Signed-off-by: Alex Williamson 
Cc: stable@vger.kernel.org	[3.17]

vfio/pci: Restore MSIx message prior to enabling

2014-09-29T16:16:24+00:00

The MSIx vector table lives in device memory, which may be cleared as
part of a backdoor device reset. This is the case on the IBM IPR HBA
when the BIST is run on the device. When assigned to a QEMU guest,
the guest driver does a pci_save_state(), issues a BIST, then does a
pci_restore_state(). The BIST clears the MSIx vector table, but due
to the way interrupts are configured the pci_restore_state() does not
restore the vector table as expected. Eventually this results in an
EEH error on Power platforms when the device attempts to signal an
interrupt with the zero'd table entry.

Fix the problem by restoring the host cached MSI message prior to
enabling each vector.

Reported-by: Wen Xiong 
Signed-off-by: Gavin Shan 
Signed-off-by: Alex Williamson

PCI/AER: Rename PCI_ERR_UNC_TRAIN to PCI_ERR_UNC_UND

2014-09-25T15:42:40+00:00

In PCIe r1.0, sec 5.10.2, bit 0 of the Uncorrectable Error Status, Mask,
and Severity Registers was for "Training Error." In PCIe r1.1, sec 7.10.2,
bit 0 was redefined to be "Undefined."

Rename PCI_ERR_UNC_TRAIN to PCI_ERR_UNC_UND to reflect this change.

No functional change.

[bhelgaas: changelog]
Signed-off-by: Chen, Gong 
Signed-off-by: Bjorn Helgaas

drivers/vfio: Enable VFIO if EEH is not supported

2014-08-08T16:39:16+00:00

The existing vfio_pci_open() fails upon error returned from
vfio_spapr_pci_eeh_open(), which breaks POWER7's P5IOC2 PHB
support which this patch brings back.

The patch fixes the issue by dropping the return value of
vfio_spapr_pci_eeh_open().

Signed-off-by: Alexey Kardashevskiy 
Signed-off-by: Gavin Shan 
Signed-off-by: Alex Williamson

vfio-pci: Attempt bus/slot reset on release

2014-08-07T17:12:07+00:00

Each time a device is released, mark whether a local reset was
successful or whether a bus/slot reset is needed.  If a reset is
needed and all of the affected devices are bound to vfio-pci and
unused, allow the reset.  This is most useful when the userspace
driver is killed and releases all the devices in an unclean state,
such as when a QEMU VM quits.

Signed-off-by: Alex Williamson