diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-09 10:19:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-09 10:19:36 -0700 |
| commit | d75671e36e14b73d7c0d3cec49328dcd984af699 (patch) | |
| tree | 87604fe7c082b82b436f2111e47f5a366436271e /drivers/vfio/pci/vfio_pci_config.c | |
| parent | bf97293eb878df3792d9de7213bd7b82135aea77 (diff) | |
| parent | dac09b57c0ff57e55dd6fa5109076c8af0468a75 (diff) | |
Merge tag 'vfio-v3.12-rc0' of git://github.com/awilliam/linux-vfio
Pull VFIO update from Alex Williamson:
"VFIO updates include safer default file flags for VFIO device fds, an
external user interface exported to allow other modules to hold
references to VFIO groups, a fix to test for extended config space on
PCIe and PCI-x, and new hot reset interfaces for PCI devices which
allows the user to do PCI bus/slot resets when all of the devices
affected by the reset are owned by the user.
For this last feature, the PCI bus reset interface, I depend on
changes already merged from Bjorn's PCI pull request. I therefore
merged my tree up to commit cb3e433, which I think was the correct
action, but as Stephen Rothwell noted, I failed to provide a commit
message indicating why the merge was required. Sorry for that.
Thanks, Alex"
* tag 'vfio-v3.12-rc0' of git://github.com/awilliam/linux-vfio:
vfio: fix documentation
vfio-pci: PCI hot reset interface
vfio-pci: Test for extended config space
vfio-pci: Use fdget() rather than eventfd_fget()
vfio: Add O_CLOEXEC flag to vfio device fd
vfio: use get_unused_fd_flags(0) instead of get_unused_fd()
vfio: add external user support
Diffstat (limited to 'drivers/vfio/pci/vfio_pci_config.c')
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_config.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/vfio/pci/vfio_pci_config.c b/drivers/vfio/pci/vfio_pci_config.c index affa34745be..ffd0632c3cb 100644 --- a/drivers/vfio/pci/vfio_pci_config.c +++ b/drivers/vfio/pci/vfio_pci_config.c @@ -1012,6 +1012,7 @@ static int vfio_vc_cap_len(struct vfio_pci_device *vdev, u16 pos) static int vfio_cap_len(struct vfio_pci_device *vdev, u8 cap, u8 pos) { struct pci_dev *pdev = vdev->pdev; + u32 dword; u16 word; u8 byte; int ret; @@ -1025,7 +1026,9 @@ static int vfio_cap_len(struct vfio_pci_device *vdev, u8 cap, u8 pos) return pcibios_err_to_errno(ret); if (PCI_X_CMD_VERSION(word)) { - vdev->extended_caps = true; + /* Test for extended capabilities */ + pci_read_config_dword(pdev, PCI_CFG_SPACE_SIZE, &dword); + vdev->extended_caps = (dword != 0); return PCI_CAP_PCIX_SIZEOF_V2; } else return PCI_CAP_PCIX_SIZEOF_V0; @@ -1037,9 +1040,11 @@ static int vfio_cap_len(struct vfio_pci_device *vdev, u8 cap, u8 pos) return byte; case PCI_CAP_ID_EXP: - /* length based on version */ - vdev->extended_caps = true; + /* Test for extended capabilities */ + pci_read_config_dword(pdev, PCI_CFG_SPACE_SIZE, &dword); + vdev->extended_caps = (dword != 0); + /* length based on version */ if ((pcie_caps_reg(pdev) & PCI_EXP_FLAGS_VERS) == 1) return PCI_CAP_EXP_ENDPOINT_SIZEOF_V1; else |