diff options
| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-01-23 21:46:07 +0100 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-01-23 21:53:31 +0100 |
| commit | e08d20cdd88dbe404879ae87f87a87fece7d04bf (patch) | |
| tree | 3d137c65ac2514f009965a8192c7ccdd33c770b8 | |
| parent | 8edfe487200d3636aacf9131b8ecb7e441964f28 (diff) | |
qemu: disable AVX-512 in userland
We're trying to test kernel code, so the userland tools we use for doing
that testing don't really matter to us. We turn off AVX512, because
WireGuard supports kernels that do not support AVX512 userlands. It's
easier to just blanket-disable it all, since it doesn't matter anyway.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
| -rw-r--r-- | src/tests/qemu/Makefile | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/tests/qemu/Makefile b/src/tests/qemu/Makefile index 3d4dae4..97cd80d 100644 --- a/src/tests/qemu/Makefile +++ b/src/tests/qemu/Makefile @@ -67,6 +67,8 @@ ifeq ($(CHOST),$(CBUILD)) CROSS_COMPILE_FLAG := --host=$(CHOST) NOPIE_GCC := gcc -fno-PIE CFLAGS += -march=native +OMIT_AVX512 := $(shell gcc -march=native -Q --help=target | sed -n 's/.*\-m\(avx512[^ ]*\).*\[enabled\].*/-mno-\1/p') +CFLAGS += $(OMIT_AVX512) STRIP := strip else $(info Cross compilation: building for $(CBUILD) using $(CHOST)) |