arch/x86/Makefile disables SSE and SSE2 for the whole kernel. The AMDGPU drivers modified in this patch re-enable SSE but not SSE2. Turn on SSE2 to support emitting double precision floating point instructions rather than calls to non-existent (usually available from gcc_s or compiler_rt) floating point helper routines. Link: https://gcc.gnu.org/onlinedocs/gccint/Soft-float-library-routines.html Link: https://github.com/ClangBuiltLinux/linux/issues/327 Cc: stable@xxxxxxxxxxxxxxx # 4.19 Reported-by: S, Shirish <Shirish.S@xxxxxxx> Reported-by: Matthias Kaehlcke <mka@xxxxxxxxxx> Suggested-by: James Y Knight <jyknight@xxxxxxxxxx> Suggested-by: Nathan Chancellor <natechancellor@xxxxxxxxx> Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx> --- drivers/gpu/drm/amd/display/dc/calcs/Makefile | 2 +- drivers/gpu/drm/amd/display/dc/dml/Makefile | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/calcs/Makefile b/drivers/gpu/drm/amd/display/dc/calcs/Makefile index 95f332ee3e7e..dc85a3c088af 100644 --- a/drivers/gpu/drm/amd/display/dc/calcs/Makefile +++ b/drivers/gpu/drm/amd/display/dc/calcs/Makefile @@ -30,7 +30,7 @@ else ifneq ($(call cc-option, -mstack-alignment=16),) cc_stack_align := -mstack-alignment=16 endif -calcs_ccflags := -mhard-float -msse $(cc_stack_align) +calcs_ccflags := -mhard-float -msse -msse2 $(cc_stack_align) CFLAGS_dcn_calcs.o := $(calcs_ccflags) CFLAGS_dcn_calc_auto.o := $(calcs_ccflags) diff --git a/drivers/gpu/drm/amd/display/dc/dml/Makefile b/drivers/gpu/drm/amd/display/dc/dml/Makefile index d97ca6528f9d..33c7d7588712 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/Makefile +++ b/drivers/gpu/drm/amd/display/dc/dml/Makefile @@ -30,7 +30,7 @@ else ifneq ($(call cc-option, -mstack-alignment=16),) cc_stack_align := -mstack-alignment=16 endif -dml_ccflags := -mhard-float -msse $(cc_stack_align) +dml_ccflags := -mhard-float -msse -msse2 $(cc_stack_align) CFLAGS_display_mode_lib.o := $(dml_ccflags) CFLAGS_display_pipe_clocks.o := $(dml_ccflags) -- 2.20.1.321.g9e740568ce-goog
