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linux-stable/drivers/infiniband/hw/mlx4
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Shay Drory 404e5a1269 RDMA/mlx4: Do not map the core_clock page to user space unless enabled 
Currently when mlx4 maps the hca_core_clock page to the user space there
are read-modifiable registers, one of which is semaphore, on this page as
well as the clock counter. If user reads the wrong offset, it can modify
the semaphore and hang the device.

Do not map the hca_core_clock page to the user space unless the device has
been put in a backwards compatibility mode to support this feature.

After this patch, mlx4 core_clock won't be mapped to user space on the
majority of existing devices and the uverbs device time feature in
ibv_query_rt_values_ex() will be disabled.

Fixes: 52033cfb5a ("IB/mlx4: Add mmap call to map the hardware clock")
Link: https://lore.kernel.org/r/9632304e0d6790af84b3b706d8c18732bc0d5e27.1622726305.git.leonro@nvidia.com
Signed-off-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2021-06-03 14:19:53 -03:00
..
ah.c RDMA: Restore ability to fail on AH destroy 2020-09-09 13:57:22 -03:00
alias_GUID.c RDMA: Support more than 255 rdma ports 2021-03-26 09:31:21 -03:00
cm.c IB/mlx4: Convert rej_tmout radix-tree to XArray 2020-10-09 12:34:49 -03:00
cq.c RDMA/mlx4: Use ib_umem_num_dma_blocks() 2020-09-11 10:24:54 -03:00
doorbell.c IB: Allow calls to ib_umem_get from kernel ULPs 2020-01-16 16:14:28 +02:00
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
mad.c RDMA: Support more than 255 rdma ports 2021-03-26 09:31:21 -03:00
main.c RDMA/mlx4: Do not map the core_clock page to user space unless enabled 2021-06-03 14:19:53 -03:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mcg.c RDMA: Manual changes for sysfs_emit and neatening 2020-10-30 21:03:52 -03:00
mlx4_ib.h RDMA: Support more than 255 rdma ports 2021-03-26 09:31:21 -03:00
mr.c RDMA/uverbs: Allow drivers to create a new HW object during rereg_mr 2020-12-07 14:06:23 -04:00
qp.c RDMA/mlx4: Remove an unused variable 2021-04-20 16:32:33 -03:00
srq.c RDMA: Check srq_type during create_srq 2020-10-26 19:27:58 -03:00
sysfs.c IB/mlx4: Use port iterator and validation APIs 2021-02-02 19:25:40 -04:00