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| author | Alex Williamson <alex.williamson@redhat.com> | 2011-10-21 15:56:24 -0400 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2011-11-15 12:22:31 +0100 |
| commit | bcb71abe7d4c5a0d0368c67da0a7def4fc73497a (patch) | |
| tree | 3a043f872b234cb5c47cec1c01b4bbb69539fa0f /drivers/iommu/amd_iommu.c | |
| parent | 8fbdce659549d93dfb257ec4eabacf63a188e506 (diff) | |
| download | blackbird-obmc-linux-bcb71abe7d4c5a0d0368c67da0a7def4fc73497a.tar.gz blackbird-obmc-linux-bcb71abe7d4c5a0d0368c67da0a7def4fc73497a.zip | |
iommu: Add option to group multi-function devices
The option iommu=group_mf indicates the that the iommu driver should
expose all functions of a multi-function PCI device as the same
iommu_device_group. This is useful for disallowing individual functions
being exposed as independent devices to userspace as there are often
hidden dependencies. Virtual functions are not affected by this option.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'drivers/iommu/amd_iommu.c')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 1d82b631d09c..6f7553684c1e 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2776,11 +2776,19 @@ static int amd_iommu_domain_has_cap(struct iommu_domain *domain, static int amd_iommu_device_group(struct device *dev, unsigned int *groupid) { struct iommu_dev_data *dev_data = dev->archdata.iommu; + struct pci_dev *pdev = to_pci_dev(dev); + u16 devid; if (!dev_data) return -ENODEV; - *groupid = amd_iommu_alias_table[dev_data->devid]; + if (pdev->is_virtfn || !iommu_group_mf) + devid = dev_data->devid; + else + devid = calc_devid(pdev->bus->number, + PCI_DEVFN(PCI_SLOT(pdev->devfn), 0)); + + *groupid = amd_iommu_alias_table[devid]; return 0; } |
