From: Michael Gur <michaelgur@nvidia.com>
To: jgg@ziepe.ca, leon@kernel.org, linux-rdma@vger.kernel.org
Cc: Edward Srouji <edwards@nvidia.com>,
Yishai Hadas <yishaih@nvidia.com>,
Michael Gur <michaelgur@nvidia.com>,
stable@vger.kernel.org, Jason Gunthorpe <jgg@nvidia.com>,
Jianxin Xiong <jianxin.xiong@intel.com>,
Sean Hefty <sean.hefty@intel.com>,
Simona Vetter <simona.vetter@ffwll.ch>,
linux-kernel@vger.kernel.org (open list)
Subject: [PATCH rdma-next v2 03/15] RDMA/core: Allow optional access flags in dmabuf reg ioctl
Date: Tue, 3 Nov 2026 00:32:56 +0200 [thread overview]
Message-ID: <20261102223325.2115128-4-michaelgur@nvidia.com> (raw)
In-Reply-To: <20261102223325.2115128-1-michaelgur@nvidia.com>
The uverbs ABI reserves the optional access flags range as best-effort:
drivers should accept any flag in this range and treat the actual support
as opportunistic, never failing registration when an optional flag is
requested.
Add the optional access flag to the allow-list of dmabuf registration
ioctl. Uverbs users can now request any optional access flag on dmabuf
registrations and drivers will apply the flag's effect on a best-effort
basis when supported.
Fixes: bfe0cc6eb249 ("RDMA/uverbs: Add uverbs command for dma-buf based MR registration")
Cc: stable@vger.kernel.org
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Michael Gur <michaelgur@nvidia.com>
---
drivers/infiniband/core/uverbs_std_types_mr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/infiniband/core/uverbs_std_types_mr.c b/drivers/infiniband/core/uverbs_std_types_mr.c
index 0c72f801e0d3..b6d6cbe448a2 100644
--- a/drivers/infiniband/core/uverbs_std_types_mr.c
+++ b/drivers/infiniband/core/uverbs_std_types_mr.c
@@ -229,7 +229,7 @@ static int UVERBS_HANDLER(UVERBS_METHOD_REG_DMABUF_MR)(
IB_ACCESS_REMOTE_READ |
IB_ACCESS_REMOTE_WRITE |
IB_ACCESS_REMOTE_ATOMIC |
- IB_ACCESS_RELAXED_ORDERING);
+ IB_ACCESS_OPTIONAL);
if (ret)
return ret;
--
2.52.0
next prev parent reply other threads:[~2026-11-02 22:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20261102223325.2115128-1-michaelgur@nvidia.com>
2026-11-02 22:32 ` [PATCH rdma-next v2 01/15] RDMA/mlx5: Allow optional access flags in DM registration Michael Gur
2026-11-02 22:32 ` [PATCH rdma-next v2 02/15] RDMA/mlx5: Allow optional access flags in DEVX UMEM registration Michael Gur
2026-11-02 22:32 ` Michael Gur [this message]
2026-11-02 22:32 ` [PATCH rdma-next v2 04/15] RDMA/core: Allow optional access flags in reg mr ioctl Michael Gur
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