Please consider the following patch to the libibverbs spec which allows ppc64le to build libibverbs.

diff --git a/libibverbs.spec b/libibverbs.spec
index 2617885..a941678 100644
--- a/libibverbs.spec
+++ b/libibverbs.spec
@@ -8,7 +8,7 @@ Url: http://www.openfabrics.org/
 Source: http://www.openfabrics.org/downloads/verbs/libibverbs-%{version}.tar.gz
 Patch0: libibverbs-1.1.7-arg-fixes.patch
 BuildRoot: %(mktemp -ud %{_tmppath}/%{name}-%{version}-%{release}-XXXXXX)
-%ifnarch ia64 %{sparc} %{arm} aarch64
+%ifnarch ia64 %{sparc} %{arm} aarch64 ppc64le
 BuildRequires: valgrind-devel
 %endif
 Requires(post): /sbin/ldconfig
@@ -56,7 +56,7 @@ displays information about RDMA devices.
 %patch0 -p1 -b .fixes
 
 %build
-%ifnarch ia64 %{sparc} %{arm} aarch64
+%ifnarch ia64 %{sparc} %{arm} aarch64 ppc64le
 %configure --with-valgrind
 %else
 %configure