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From:   Michal Suchanek <msuchanek@suse.de>
To:     linuxppc-dev@lists.ozlabs.org
Cc:     Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Peter Zijlstra <peterz@infradead.org>,
        Michal Suchanek <msuchanek@suse.de>,
        Kate Stewart <kstewart@linuxfoundation.org>,
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        =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= <clg@kaod.org>,
        linux-kernel@vger.kernel.org
Subject: [PATCH RFC 8/8] powerpc/64: barrier_nospec: Add commandline trigger
Date:   Tue, 13 Mar 2018 19:33:06 +0100
Message-Id: <8639fc8cb02548d478b041c3a00ad9053fdd8bc4.1520965380.git.msuchanek@suse.de>
In-Reply-To: <cover.1520965380.git.msuchanek@suse.de>
References: <cover.1520965380.git.msuchanek@suse.de>
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References: <cover.1520965380.git.msuchanek@suse.de>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Copypasta from rfi implementation

Signed-off-by: Michal Suchanek <msuchanek@suse.de>
---
 arch/powerpc/kernel/setup_64.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 4b67b7b877d9..257f0e6be107 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -840,6 +840,14 @@ static int __init handle_no_pti(char *p)
 }
 early_param("nopti", handle_no_pti);
 
+static int __init handle_no_nospec(char *p)
+{
+	pr_info("barrier_nospec: disabled on command line.");
+	no_nospec = true;
+	return 0;
+}
+early_param("no_nospec", handle_no_nospec);
+
 static void do_nothing(void *unused)
 {
 	/*
-- 
2.13.6