From eb0a2d2620ae431c543963c8c7f08f597366fc60 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <mpe@ellerman.id.au>
Date: Fri, 23 Feb 2018 00:00:11 +1100
Subject: [PATCH] powerpc/powernv: Support firmware disable of RFI flush
References: bsc#1068032
Patch-mainline: v4.16-rc3
Git-commit: eb0a2d2620ae431c543963c8c7f08f597366fc60
Some versions of firmware will have a setting that can be configured
to disable the RFI flush, add support for it.
Fixes: 6e032b350cd1 ("powerpc/powernv: Check device-tree for RFI flush settings")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
arch/powerpc/platforms/powernv/setup.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
index 4fb21e17504a..092715b9674b 100644
--- a/arch/powerpc/platforms/powernv/setup.c
+++ b/arch/powerpc/platforms/powernv/setup.c
@@ -80,6 +80,10 @@ static void pnv_setup_rfi_flush(void)
if (np && of_property_read_bool(np, "disabled"))
enable--;
+ np = of_get_child_by_name(fw_features, "speculation-policy-favor-security");
+ if (np && of_property_read_bool(np, "disabled"))
+ enable = 0;
+
of_node_put(np);
of_node_put(fw_features);
}
--
2.13.6