From c63d688c3dabca973c5a7da73d17422ad13f3737 Mon Sep 17 00:00:00 2001
From: Alistair Popple <alistair@popple.id.au>
Date: Thu, 21 May 2020 11:43:39 +1000
Subject: [PATCH] powerpc/dt_cpu_ftrs: Enable Prefixed Instructions
References: jsc#SLE-13847
Patch-mainline: v5.8-rc1
Git-commit: c63d688c3dabca973c5a7da73d17422ad13f3737
Prefix instructions have their own FSCR bit which needs to be enabled
via a CPU feature. The kernel will save the FSCR for problem state but
it needs to be enabled initially.
Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200521014341.29095-6-alistair@popple.id.au
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
arch/powerpc/kernel/dt_cpu_ftrs.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c
index 46a85584e20b..87a5d47415eb 100644
--- a/arch/powerpc/kernel/dt_cpu_ftrs.c
+++ b/arch/powerpc/kernel/dt_cpu_ftrs.c
@@ -634,6 +634,7 @@ static struct dt_cpu_feature_match __initdata
{"vector-binary128", feat_enable, 0},
{"vector-binary16", feat_enable, 0},
{"wait-v3", feat_enable, 0},
+ {"prefix-instructions", feat_enable, 0},
};
static bool __initdata using_dt_cpu_ftrs;
--
2.26.2