Alex, On Sat, May 12, 2012 at 6:55 AM, Alex Williamson <alex.williamson@xxxxxxxxxx> wrote: > Integrating IOMMU groups more closely into the driver core allows > us to more easily work around DMA quirks. The Ricoh multifunction > controller is a favorite example of devices that are currently > incompatible with IOMMU isolation as all the functions use the > requestor ID of function 0 for DMA. Passing this device into > pci_dma_quirk returns the PCI device to use for DMA. The IOMMU > driver can then construct an IOMMU group including both devices. > Please give some thought to the Marvell SATA controller quirk as well. Instead of multiple visible functions using the same requester ID of function 0, the Marvell device only makes function 0 visible, but uses the requestor ID of function 1 as well during DMA. See https://bugzilla.redhat.com/show_bug.cgi?id=757166 -- A. -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
