• Alex Williamson's avatar
    iommu/vt-d: Update to use PCI DMA aliases · 579305f7
    Alex Williamson authored
    VT-d code currently makes use of pci_find_upstream_pcie_bridge() in
    order to find the topology based alias of a device.  This function has
    a few problems.  First, it doesn't check the entire alias path of the
    device to the root bus, therefore if a PCIe device is masked upstream,
    the wrong result is produced.  Also, it's known to get confused and
    give up when it crosses a bridge from a conventional PCI bus to a PCIe
    bus that lacks a PCIe capability.  The PCI-core provided DMA alias
    support solves both of these problems and additionally adds support
    for DMA function quirks allowing VT-d to work with devices like
    Marvell and Ricoh with known broken requester IDs.
    Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
    Cc: David Woodhouse <dwmw2@infradead.org>
    Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
    579305f7
intel_irq_remapping.c 27.3 KB