From 732c0c3c70869af53654db2b56dffdd8d4df5211 Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Thu, 31 Jul 2014 14:53:16 +0100 Subject: [PATCH] MIPS: fix MSA context for tasks which don't use FP first If a task does not execute scalar FP instructions prior to using MSA then the flags indicating that the task has live MSA context were not being set. The upper 64b of each vector register would then be lost upon the tasks first context switch after using MSA. Signed-off-by: Paul Burton Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7500/ Signed-off-by: Ralf Baechle --- arch/mips/kernel/traps.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 1ed84577d3e3..4716b89543a9 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -1097,6 +1097,8 @@ static int enable_restore_fp_context(int msa) if (msa && !err) { enable_msa(); _init_msa_upper(); + set_thread_flag(TIF_USEDMSA); + set_thread_flag(TIF_MSA_CTX_LIVE); } if (!err) set_used_math(); -- 2.34.1