From: Diana Craciun <diana.craciun@nxp.com>
Date: Wed, 12 Dec 2018 14:03:08 +0000 (+0200)
Subject: powerpc/fsl: Enable runtime patching if nospectre_v2 boot arg is used
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=3bc8ea8603ae4c1e09aca8de229ad38b8091fcb3;p=openwrt%2Fstaging%2Fblogic.git

powerpc/fsl: Enable runtime patching if nospectre_v2 boot arg is used

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>
---

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 4fe7740917a7..ca00fbb97cf8 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -974,6 +974,7 @@ void __init setup_arch(char **cmdline_p)
 		ppc_md.setup_arch();
 
 	setup_barrier_nospec();
+	setup_spectre_v2();
 
 	paging_init();