| Message ID | 20200923103312.55507-1-jiaxun.yang@flygoat.com |
|---|---|
| State | New |
| Headers | show |
| Series | MIPS: Loongson2ef: Disable Loongson MMI instructions | expand |
On Wed, Sep 23, 2020 at 06:33:12PM +0800, Jiaxun Yang wrote: > It was missed when I was forking Loongson2ef from Loongson64 but > should be applied to Loongson2ef as march=loongson2f > will also enable Loongson MMI in GCC-9+. > > Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> > Fixes: 71e2f4dd5a65 ("MIPS: Fork loongson2ef from loongson64") > Reported-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> > Cc: stable@vger.kernel.org # v5.8+ > --- > arch/mips/loongson2ef/Platform | 4 ++++ > 1 file changed, 4 insertions(+) applied to mips-fixes. Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]
diff --git a/arch/mips/loongson2ef/Platform b/arch/mips/loongson2ef/Platform index 4ab55f1123a0..ae023b9a1c51 100644 --- a/arch/mips/loongson2ef/Platform +++ b/arch/mips/loongson2ef/Platform @@ -44,6 +44,10 @@ ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS endif endif +# Some -march= flags enable MMI instructions, and GCC complains about that +# support being enabled alongside -msoft-float. Thus explicitly disable MMI. +cflags-y += $(call cc-option,-mno-loongson-mmi) + # # Loongson Machines' Support #
It was missed when I was forking Loongson2ef from Loongson64 but should be applied to Loongson2ef as march=loongson2f will also enable Loongson MMI in GCC-9+. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Fixes: 71e2f4dd5a65 ("MIPS: Fork loongson2ef from loongson64") Reported-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: stable@vger.kernel.org # v5.8+ --- arch/mips/loongson2ef/Platform | 4 ++++ 1 file changed, 4 insertions(+)