linux-kernel - [PATCH 4.19 040/134] powerpc/fsl: Enable runtime patching if nospectre

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Message-Id: <20190401170048.429498197@linuxfoundation.org>
Date:   Mon,  1 Apr 2019 19:01:16 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Diana Craciun <diana.craciun@....com>,
        Michael Ellerman <mpe@...erman.id.au>
Subject: [PATCH 4.19 040/134] powerpc/fsl: Enable runtime patching if nospectre_v2 boot arg is used

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

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

From: Diana Craciun <diana.craciun@....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@....com>
Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 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();