[PATCH stable v4.9 31/35] powerpc/fsl: Enable runtime patching if nospectre_v2 boot arg is used

Michael Ellerman
2019-04-11T11:47:24Z

From: Diana Craciun <diana.craciun@nxp.com>

commit 3bc8ea8603ae4c1e09aca8de229ad38b8091fcb3 upstream.

If the user choses not to use the mitigations, replace
the code sequence with nops.

Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/kernel/setup-common.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index d5a128f54537..5e7d70c5d065 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -919,6 +919,7 @@ void __init setup_arch(char **cmdline_p)
ppc_md.setup_arch();

setup_barrier_nospec();
+ setup_spectre_v2();

paging_init();

--
2.20.1