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| author | Shay Drory <shayd@nvidia.com> | 2021-06-03 16:19:39 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2021-06-03 20:19:53 +0300 |
| commit | 404e5a12691fe797486475fe28cc0b80cb8bef2c (patch) | |
| tree | 780766b010ff747f2a6c1ef3ef6e52edf3f53b75 /drivers/net/ethernet/mellanox/mlx4/fw.h | |
| parent | a0ffb4c12f7fa89163e228e6f27df09b46631db1 (diff) | |
| download | linux-404e5a12691fe797486475fe28cc0b80cb8bef2c.tar.xz | |
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: 52033cfb5aab ("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>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/fw.h')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/fw.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/fw.h b/drivers/net/ethernet/mellanox/mlx4/fw.h index 8f020f26ebf5..cf64e54eecb0 100644 --- a/drivers/net/ethernet/mellanox/mlx4/fw.h +++ b/drivers/net/ethernet/mellanox/mlx4/fw.h @@ -131,6 +131,7 @@ struct mlx4_dev_cap { u32 health_buffer_addrs; struct mlx4_port_cap port_cap[MLX4_MAX_PORTS + 1]; bool wol_port[MLX4_MAX_PORTS + 1]; + bool map_clock_to_user; }; struct mlx4_func_cap { |