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 <paul.burton@xxxxxxxxxx>
---
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 9359907..58a067f 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1096,6 +1096,8 @@ static int enable_restore_fp_context(int msa)
if (msa && !err) {
enable_msa();
_clear_msa_upper();
+ set_thread_flag(TIF_USEDMSA);
+ set_thread_flag(TIF_MSA_CTX_LIVE);
}
if (!err)
set_used_math();
--
2.0.1
