On Tue, 2012-10-16 at 16:50 +0000, Tom Mingarelli wrote: > This patch is to prevent devices that have RMRRs associated with them > from getting placed into the SI Domain during init. We don't put USB devices > into this category, however. This fixes the issue where the RMRR info > for devices being placed in and out of the SI Domain gets lost. > > Signed-off-by: Thomas Mingarelli <thomas.mingare...@hp.com> > ---- > PATCH v1: https://lkml.org/lkml/2012/6/15/204 > PATCH v2: https://lkml.org/lkml/2012/9/18/354 > > drivers/iommu/intel-iommu.c | 33 +++++++++++++++++++++++++++++++++ > 1 files changed, 33 insertions(+), 0 deletions(-) > > diff -up ./drivers/iommu/intel-iommu.c.ORIG ./drivers/iommu/intel-iommu.c > --- ./drivers/iommu/intel-iommu.c.ORIG 2012-10-16 09:34:23.148089944 > -0500 > +++ ./drivers/iommu/intel-iommu.c 2012-10-16 09:56:56.905932861 -0500 > @@ -2320,8 +2320,41 @@ static int domain_add_dev_info(struct dm > return 0; > } > > +static bool device_has_rmrr(struct pci_dev *dev) > +{ > + struct dmar_rmrr_unit *rmrr; > + int i; > + > + for_each_rmrr_units(rmrr) { > + for (i = 0; i < rmrr->devices_cnt; i++) { > + /* > + * Here we are just concerned with checking each device > + * that has an RMRR associated with it and not allow it > + * to be placed into the SI Domain during startup. > + */ > + if (rmrr->devices[i] == dev) > + return true; > + } > + } > + return false; > +} > + > static int iommu_should_identity_map(struct pci_dev *pdev, int startup) > { > + > + if (startup) { > + /* > + * This is where we will refuse any device that has an > + * RMRR associated with it and is not a USB device and > + * NOT allow it to be placed into the SI Domain. We > + * only do this on startup. We don't need a separate bit > + * for this because it could be ANY device. > + */ > + if (device_has_rmrr(pdev) && > + (pdev->class >> 8) != PCI_CLASS_SERIAL_USB)
Forgot to ask in my last response. Is it sufficient to check _USB. Are we missing any other devices that use RMRR that would qualify? > + return 0; > + } > + > if ((iommu_identity_mapping & IDENTMAP_AZALIA) && IS_AZALIA(pdev)) > return 1; > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
