diff options
| author | Reinette Chatre <reinette.chatre@intel.com> | 2023-05-11 17:44:36 +0200 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2023-05-23 23:49:03 +0200 |
| commit | dd27a707003818fc8435d8621527d4b3af7d2ab1 (patch) | |
| tree | 22a492961e04eb0a10b82f1c102f0a8b3e5ef0fd /drivers/vfio | |
| parent | vfio/pci: Use bitfield for struct vfio_pci_core_device flags (diff) | |
| download | linux-dd27a707003818fc8435d8621527d4b3af7d2ab1.tar.xz linux-dd27a707003818fc8435d8621527d4b3af7d2ab1.zip | |
vfio/pci: Probe and store ability to support dynamic MSI-X
Not all MSI-X devices support dynamic MSI-X allocation. Whether
a device supports dynamic MSI-X should be queried using
pci_msix_can_alloc_dyn().
Instead of scattering code with pci_msix_can_alloc_dyn(),
probe this ability once and store it as a property of the
virtual device.
Suggested-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/f1ae022c060ecb7e527f4f53c8ccafe80768da47.1683740667.git.reinette.chatre@intel.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio')
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_core.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index ae0e161c7fc9..a3635a8e54c8 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -530,8 +530,11 @@ int vfio_pci_core_enable(struct vfio_pci_core_device *vdev) vdev->msix_bar = table & PCI_MSIX_TABLE_BIR; vdev->msix_offset = table & PCI_MSIX_TABLE_OFFSET; vdev->msix_size = ((flags & PCI_MSIX_FLAGS_QSIZE) + 1) * 16; - } else + vdev->has_dyn_msix = pci_msix_can_alloc_dyn(pdev); + } else { vdev->msix_bar = 0xFF; + vdev->has_dyn_msix = false; + } if (!vfio_vga_disabled() && vfio_pci_is_vga(pdev)) vdev->has_vga = true; |