BMC/Intel-BMC/linux.git/drivers/iommu/iommu.c, branch dev

iommu: Ignore -ENODEV errors from add_device call-back

2015-06-29T19:57:19+00:00

The -ENODEV error just means that the device is not translated by an IOMMU. We shouldn't bail out of iommu driver initialization when that happens, as this is a common scenario on ARM. Not returning -ENODEV in the drivers would be a bad idea, as the IOMMU core would have no indication whether a device is translated or not. This indication is not used at the moment, but will probably be in the future. Fixes: 19762d7 ("iommu: Propagate error in add_iommu_group") Tested-by: Marek Szyprowski Tested-by: Eric Auger Tested-by: Heiko Stuebner Signed-off-by: Joerg Roedel

Merge branches 'arm/rockchip', 'arm/exynos', 'arm/smmu', 'x86/vt-d', 'x86/amd', 'default-domains' and 'core' into next

2015-06-19T15:17:47+00:00

iommu: Checking for NULL instead of IS_ERR

2015-06-11T07:42:25+00:00

The iommu_group_alloc() and iommu_group_get_for_dev() functions return error pointers, they never return NULL. Signed-off-by: Dan Carpenter Signed-off-by: Joerg Roedel

iommu: Introduce iommu_request_dm_for_dev()

2015-06-11T07:01:55+00:00

This function can be called by an IOMMU driver to request that a device's default domain is direct mapped. Signed-off-by: Joerg Roedel

iommu: Add function to query the default domain of a group

2015-06-09T06:55:24+00:00

This will be used to handle unity mappings in the iommu drivers. Signed-off-by: Joerg Roedel

iommu: Create direct mappings in default domains

2015-06-09T06:55:24+00:00

Use the information exported by the IOMMU drivers to create direct mapped regions in the default domains. Signed-off-by: Joerg Roedel

iommu: Introduce direct mapped region handling

2015-06-09T06:55:23+00:00

Add two new functions to the IOMMU-API to allow the IOMMU drivers to export the requirements for direct mapped regions per device. This is useful for exporting the information in Intel VT-d's RMRR entries or AMD-Vi's unity mappings. Signed-off-by: Joerg Roedel

iommu: Add iommu_get_domain_for_dev function

2015-06-09T06:55:23+00:00

This function can be used to request the current domain a device is attached to. Signed-off-by: Joerg Roedel

iommu: Make sure a device is always attached to a domain

2015-06-09T06:55:22+00:00

Make use of the default domain and re-attach a device to it when it is detached from another domain. Also enforce that a device has to be in the default domain before it can be attached to a different domain. Signed-off-by: Joerg Roedel

iommu: Limit iommu_attach/detach_device to devices with their own group

2015-06-09T06:55:21+00:00

This patch changes the behavior of the iommu_attach_device and iommu_detach_device functions. With this change these functions only work on devices that have their own group. For all other devices the iommu_group_attach/detach functions must be used. Signed-off-by: Joerg Roedel