[PATCH 4.19 040/134] powerpc/fsl: Enable runtime patching if nospectre_v2 boot arg is used

From: Greg Kroah-Hartman
Date: Mon Apr 01 2019 - 14:03:13 EST


4.19-stable review patch. If anyone has any objections, please let me know.

------------------

From: Diana Craciun <diana.craciun@xxxxxxx>

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@xxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/kernel/setup-common.c | 1 +
1 file changed, 1 insertion(+)

--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -973,6 +973,7 @@ void __init setup_arch(char **cmdline_p)
ppc_md.setup_arch();

setup_barrier_nospec();
+ setup_spectre_v2();

paging_init();