linux-kernel - [PATCHv2 1/7] ppc bpf/jit: Disable classic BPF JIT on ppc64le

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Date:	Wed, 22 Jun 2016 21:55:01 +0530
From:	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	netdev@...r.kernel.org, Michael Ellerman <mpe@...erman.id.au>
Cc:	stable@...r.kernel.org, Matt Evans <matt@...abs.org>,
	Denis Kirjanov <kda@...ux-powerpc.org>,
	Paul Mackerras <paulus@...ba.org>,
	Alexei Starovoitov <ast@...com>,
	Daniel Borkmann <daniel@...earbox.net>,
	"David S. Miller" <davem@...emloft.net>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Thadeu Lima de Souza Cascardo <cascardo@...hat.com>
Subject: [PATCHv2 1/7] ppc bpf/jit: Disable classic BPF JIT on ppc64le

Classic BPF JIT was never ported completely to work on little endian
powerpc. However, it can be enabled and will crash the system when used.
As such, disable use of BPF JIT on ppc64le.

Cc: stable@...r.kernel.org
Cc: Matt Evans <matt@...abs.org>
Cc: Denis Kirjanov <kda@...ux-powerpc.org>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Alexei Starovoitov <ast@...com>
Cc: Daniel Borkmann <daniel@...earbox.net>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Ananth N Mavinakayanahalli <ananth@...ibm.com>
Cc: Thadeu Lima de Souza Cascardo <cascardo@...hat.com>
Reported-by: Thadeu Lima de Souza Cascardo <cascardo@...hat.com>
Signed-off-by: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>
---
 arch/powerpc/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 01f7464..0a9d439 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -128,7 +128,7 @@ config PPC
 	select IRQ_FORCED_THREADING
 	select HAVE_RCU_TABLE_FREE if SMP
 	select HAVE_SYSCALL_TRACEPOINTS
-	select HAVE_CBPF_JIT
+	select HAVE_CBPF_JIT if CPU_BIG_ENDIAN
 	select HAVE_ARCH_JUMP_LABEL
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select ARCH_HAS_GCOV_PROFILE_ALL
-- 
2.8.2