kernel.git/drivers/iommu, branch linux-3.12.y

iommu/amd: Fix the left value check of cmd buffer

2017-01-26T16:40:14Z

commit 432abf68a79332282329286d190e21fe3ac02a31 upstream. The generic command buffer entry is 128 bits (16 bytes), so the offset of tail and head pointer should be 16 bytes aligned and increased with 0x10 per command. When cmd buf is full, head = (tail + 0x10) % CMD_BUFFER_SIZE. So when left space of cmd buf should be able to store only two command, we should be issued one COMPLETE_WAIT additionally to wait all older commands completed. Then the left space should be increased after IOMMU fetching from cmd buf. So left check value should be left <= 0x20 (two commands). Signed-off-by: Huang Rui Fixes: ac0ea6e92b222 ('x86/amd-iommu: Improve handling of full command buffer') Signed-off-by: Joerg Roedel Signed-off-by: Jiri Slaby

iommu/amd: Free domain id when free a domain of struct dma_ops_domain

2016-11-24T15:23:47Z

commit c3db901c54466a9c135d1e6e95fec452e8a42666 upstream. The current code missed freeing domain id when free a domain of struct dma_ops_domain. Signed-off-by: Baoquan He Fixes: ec487d1a110a ('x86, AMD IOMMU: add domain allocation and deallocation functions') Signed-off-by: Joerg Roedel Signed-off-by: Jiri Slaby

iommu/amd: Update Alias-DTE in update_device_table()

2016-10-06T06:22:01Z

commit 3254de6bf74fe94c197c9f819fe62a3a3c36f073 upstream. Not doing so might cause IO-Page-Faults when a device uses an alias request-id and the alias-dte is left in a lower page-mode which does not cover the address allocated from the iova-allocator. Fixes: 492667dacc0a ('x86/amd-iommu: Remove amd_iommu_pd_table') Signed-off-by: Joerg Roedel Signed-off-by: Jiri Slaby

iommu/amd: Fix boot warning when device 00:00.0 is not iommu covered

2016-03-07T15:05:23Z

commit 38e45d02ea9f194b89d6bf41e52ccafc8e2c2b47 upstream. The setup code for the performance counters in the AMD IOMMU driver tests whether the counters can be written. It tests to setup a counter for device 00:00.0, which fails on systems where this particular device is not covered by the IOMMU. Fix this by not relying on device 00:00.0 but only on the IOMMU being present. Signed-off-by: Suravee Suthikulpanit Signed-off-by: Joerg Roedel Signed-off-by: Jiri Slaby

iommu/vt-d: Fix 64-bit accesses to 32-bit DMAR_GSTS_REG

2016-02-25T09:49:11Z

commit fda3bec12d0979aae3f02ee645913d66fbc8a26e upstream. This is a 32-bit register. Apparently harmless on real hardware, but causing justified warnings in simulation. Signed-off-by: CQ Tang Signed-off-by: David Woodhouse Signed-off-by: Jiri Slaby

iommu/amd: Don't clear DTE flags when modifying it

2015-11-09T11:02:13Z

commit cbf3ccd09d683abf1cacd36e3640872ee912d99b upstream. During device assignment/deassignment the flags in the DTE get lost, which might cause spurious faults, for example when the device tries to access the system management range. Fix this by not clearing the flags with the rest of the DTE. Reported-by: G. Richard Bellamy Tested-by: G. Richard Bellamy Signed-off-by: Joerg Roedel Signed-off-by: Jiri Slaby

iommu/amd: Handle integer overflow in dma_ops_area_alloc

2015-10-07T07:24:57Z

commit e6aabee05f41c9d18e0b92194819edd84f352ac9 upstream. Handle this case to make sure boundary_size does not become 0 and trigger a BUG_ON later. Signed-off-by: Joerg Roedel Signed-off-by: Jiri Slaby

iommu/amd: Handle large pages correctly in free_pagetable

2015-07-30T12:10:41Z

commit 0b3fff54bc01e8e6064d222a33e6fa7adabd94cd upstream. Make sure that we are skipping over large PTEs while walking the page-table tree. Fixes: 5c34c403b723 ("iommu/amd: Fix memory leak in free_pagetable") Signed-off-by: Joerg Roedel Signed-off-by: Jiri Slaby

iommu/amd: Correctly encode huge pages in iommu page tables

2015-06-10T11:31:35Z

commit d4b036648402bb4ef6d4a0df51375a2fb705b6cc upstream. When a default page-size for given level should be mapped, the level encoding must be 0 rather than 7. This fixes an issue seen on IOMMUv2 hardware, where this encoding is enforced. Tested-by: Suravee Suthikulpanit Signed-off-by: Joerg Roedel Signed-off-by: Jiri Slaby

iommu/amd: Optimize amd_iommu_iova_to_phys for new fetch_pte interface

2015-06-10T11:31:30Z

commit b24b1b63a37d05d61601d643ef30f95dd2452048 upstream. Now that fetch_pte returns the page-size of the pte, this function can be optimized too. Tested-by: Suravee Suthikulpanit Signed-off-by: Joerg Roedel Signed-off-by: Jiri Slaby