GCC 8 emitted MOVDQU when compiling vmx.elf, but we do not enable CR4.OSFXSR in that test, so the instruction throws #UD. This patch forbids all sse2 instructions, instead of enabling CR4.OSFXSR, as I think it's better to keep the environment minimal. Signed-off-by: Radim Krčmář <rkrcmar@xxxxxxxxxx> --- This probably hit a minor KVM bug: the instruction was "f3 0f 6f 41 28", but KVM reported that #UD happened on "f3 0f 6f 41". --- x86/Makefile.x86_64 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/x86/Makefile.x86_64 b/x86/Makefile.x86_64 index 623fc5b37726..6caa3a8863f1 100644 --- a/x86/Makefile.x86_64 +++ b/x86/Makefile.x86_64 @@ -1,7 +1,7 @@ cstart.o = $(TEST_DIR)/cstart64.o bits = 64 ldarch = elf64-x86-64 -COMMON_CFLAGS += -mno-red-zone +COMMON_CFLAGS += -mno-red-zone -mno-sse2 cflatobjs += lib/x86/setjmp64.o cflatobjs += lib/x86/intel-iommu.o -- 2.16.2
