diff options
| author | Yuval Shaia <yuval.shaia@oracle.com> | 2019-08-18 16:21:07 +0300 |
|---|---|---|
| committer | Marcel Apfelbaum <marcel.apfelbaum@gmail.com> | 2019-11-06 12:49:04 +0200 |
| commit | 68b89aee710ab48b3dcaaa721bbc5d8aa5ea24d1 (patch) | |
| tree | 9f3ecdbdc16421e3f88198a038995e0d2cad5038 /hw/rdma/rdma_rm.c | |
| parent | ee108585bb1924a8df88188925d0d01b90b4b9e8 (diff) | |
hw/rdma: Utilize ibv_reg_mr_iova for memory registration
The virtual address that is provided by the guest in post_send and
post_recv operations is related to the guest address space. This address
space is unknown to the HCA resides on host so extra step in these
operations is needed to adjust the address to host virtual address.
This step, which is done in data-path affects performances.
An enhanced verion of MR registration introduced here
https://patchwork.kernel.org/patch/11044467/ can be used so that the
guest virtual address space for this MR is known to the HCA in host.
This will save the data-path adjustment.
Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com>
Reviewed-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Message-Id: <20190818132107.18181-3-yuval.shaia@oracle.com>
Signed-off-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Diffstat (limited to 'hw/rdma/rdma_rm.c')
| -rw-r--r-- | hw/rdma/rdma_rm.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/hw/rdma/rdma_rm.c b/hw/rdma/rdma_rm.c index 1927f85472..1524dfaeaa 100644 --- a/hw/rdma/rdma_rm.c +++ b/hw/rdma/rdma_rm.c @@ -227,8 +227,13 @@ int rdma_rm_alloc_mr(RdmaDeviceResources *dev_res, uint32_t pd_handle, mr->length = guest_length; mr->virt += (mr->start & (TARGET_PAGE_SIZE - 1)); +#ifdef LEGACY_RDMA_REG_MR ret = rdma_backend_create_mr(&mr->backend_mr, &pd->backend_pd, mr->virt, mr->length, access_flags); +#else + ret = rdma_backend_create_mr(&mr->backend_mr, &pd->backend_pd, mr->virt, + mr->length, guest_start, access_flags); +#endif if (ret) { ret = -EIO; goto out_dealloc_mr; |