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linux/include/uapi
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Aharon Landau c11f48764c RDMA/mlx5: Don't compare mkey tags in DEVX indirect mkey 
[ Upstream commit 13ad1125b9 ]

According to the ib spec:
If the CI supports the Base Memory Management Extensions defined in this
specification, the L_Key format must consist of:
24 bit index in the most significant bits of the R_Key, and
8 bit key in the least significant bits of the R_Key
Through a successful Allocate L_Key verb invocation, the CI must let the
consumer own the key portion of the returned R_Key

Therefore, when creating a mkey using DEVX, the consumer is allowed to
change the key part. The kernel should compare only the index part of a
R_Key to determine equality with another R_Key.

Adding capability in order not to break backward compatibility.

Fixes: 534fd7aac5 ("IB/mlx5: Manage indirection mkey upon DEVX flow for ODP")
Link: https://lore.kernel.org/r/3d669aacea85a3a15c3b3b953b3eaba3f80ef9be.1659255945.git.leonro@nvidia.com
Signed-off-by: Aharon Landau <aharonl@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2022-10-26 12:35:03 +02:00
..
asm-generic signal: Deliver SIGTRAP on perf event asynchronously if blocked 2022-06-09 10:22:48 +02:00
drm drm/fourcc: fix integer type usage in uapi header 2022-07-07 17:53:34 +02:00
linux btrfs: remove no longer needed logic for replaying directory deletes 2022-09-05 10:30:09 +02:00
misc habanalabs: fix resetting args in wait for CS IOCTL 2021-09-29 12:18:48 +03:00
mtd mtd: add OTP (one-time-programmable) erase ioctl 2021-03-28 19:24:54 +02:00
rdma RDMA/mlx5: Don't compare mkey tags in DEVX indirect mkey 2022-10-26 12:35:03 +02:00
scsi scsi: fc: Add EDC ELS definition 2021-08-24 22:56:33 -04:00
sound ASoC: hdmi-codec: Fix OOB memory accesses 2022-02-08 18:34:03 +01:00
video License cleanup: add SPDX license identifier to uapi header files with a license 2017-11-02 11:20:11 +01:00
xen xen/gntdev: gntdev.h: drop a duplicated word 2020-08-03 07:46:42 +02:00
Kbuild kbuild: re-implement Makefile.headersinst without recursion 2019-06-15 19:57:02 +09:00