[PATCH 4.4 079/266] powerpc/fsl: Enable runtime patching if nospectre_v2 boot arg is used

[Greg Kroah-Hartman]

From: Diana Craciun <diana.craciun at 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 at nxp.com>
Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
---
 arch/powerpc/kernel/setup_32.c |    1 +
 arch/powerpc/kernel/setup_64.c |    1 +
 2 files changed, 2 insertions(+)

--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -323,6 +323,7 @@ void __init setup_arch(char **cmdline_p)
 	if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
 
 	setup_barrier_nospec();
+	setup_spectre_v2();
 
 	paging_init();
 
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -737,6 +737,7 @@ void __init setup_arch(char **cmdline_p)
 		ppc_md.setup_arch();
 
 	setup_barrier_nospec();
+	setup_spectre_v2();
 
 	paging_init();