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RDMA/bnxt_re: Avoid exposing umdbr to userspace

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The umdbr field in struct bnxt_re_db_region returns the raw
unmapped PCI BAR address of the doorbell region. Avoid sharing
this field to the userspace. Change this to a reserved field
and stop populating it, keeping the ABI layout and size
unchanged for existing binaries.

Fixes: 1234a9d8ae ("RDMA/bnxt_re: Support doorbell extensions")
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
Link: https://patch.msgid.link/20260824172443.33943-1-sriharsha.basavapatna@broadcom.com
Reviewed-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Sriharsha Basavapatna
2026-09-02 09:27:35 -04:00
committed by Leon Romanovsky
parent 99c24a8968
commit 23d7e03a52
2 changed files with 3 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/infiniband/hw/bnxt_re/uapi.c
+2 -4
View File
@@ -462,7 +462,6 @@ static int UVERBS_HANDLER(BNXT_RE_METHOD_DBR_ALLOC)(struct uverbs_attr_bundle *a
uobj->object = obj;
uverbs_finalize_uobj_create(attrs, BNXT_RE_ALLOC_DBR_HANDLE);
dbr.umdbr = dpi->umdbr;
dbr.dpi = dpi->dpi;
ret = uverbs_copy_to_struct_or_zero(attrs, BNXT_RE_ALLOC_DBR_ATTR,
&dbr, sizeof(dbr));
@@ -525,7 +524,6 @@ static int UVERBS_HANDLER(BNXT_RE_METHOD_GET_DEFAULT_DBR)(struct uverbs_attr_bun
return PTR_ERR(ib_uctx);
uctx = container_of(ib_uctx, struct bnxt_re_ucontext, ib_uctx);
dpi.umdbr = uctx->dpi.umdbr;
dpi.dpi = uctx->dpi.dpi;
ret = uverbs_copy_to_struct_or_zero(attrs, BNXT_RE_DEFAULT_DBR_ATTR,
@@ -543,7 +541,7 @@ DECLARE_UVERBS_NAMED_METHOD(BNXT_RE_METHOD_DBR_ALLOC,
UA_MANDATORY),
UVERBS_ATTR_PTR_OUT(BNXT_RE_ALLOC_DBR_ATTR,
UVERBS_ATTR_STRUCT(struct bnxt_re_db_region,
umdbr),
reserved2),
UA_MANDATORY),
UVERBS_ATTR_PTR_OUT(BNXT_RE_ALLOC_DBR_OFFSET,
UVERBS_ATTR_TYPE(u64),
@@ -563,7 +561,7 @@ DECLARE_UVERBS_NAMED_OBJECT(BNXT_RE_OBJECT_DBR,
DECLARE_UVERBS_NAMED_METHOD(BNXT_RE_METHOD_GET_DEFAULT_DBR,
UVERBS_ATTR_PTR_OUT(BNXT_RE_DEFAULT_DBR_ATTR,
UVERBS_ATTR_STRUCT(struct bnxt_re_db_region,
umdbr),
reserved2),
UA_MANDATORY));
DECLARE_UVERBS_GLOBAL_METHODS(BNXT_RE_OBJECT_DEFAULT_DBR,
include/uapi/rdma/bnxt_re-abi.h
+1 -1
View File
@@ -250,7 +250,7 @@ struct bnxt_re_query_device_ex_resp {
struct bnxt_re_db_region {
__u32 dpi;
__u32 reserved;
__aligned_u64 umdbr;
__aligned_u64 reserved2;
};
enum bnxt_re_obj_dbr_alloc_attrs {