[PATCH 06/13] selftests/nolibc: allow specify a bios for qemu

[Zhangjin Wu]

riscv qemu has a builtin bios (opensbi), but it may not match the latest
kernel and some old versions may hang during boot, let's allow user pass
a newer version to qemu via the -bios option.

we can use it like this:

    $ make run BIOS=/path/to/new-bios ...

Signed-off-by: Zhangjin Wu <falcon at tinylab.org>
---
 tools/testing/selftests/nolibc/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/nolibc/Makefile b/tools/testing/selftests/nolibc/Makefile
index 9adc8944dd80..9213763ab3b6 100644
--- a/tools/testing/selftests/nolibc/Makefile
+++ b/tools/testing/selftests/nolibc/Makefile
@@ -70,7 +70,8 @@ QEMU_ARGS_mips       = -M malta -append "panic=-1 $(TEST:%=NOLIBC_TEST=%)"
 QEMU_ARGS_riscv      = -M virt -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
 QEMU_ARGS_s390       = -M s390-ccw-virtio -m 1G -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
 QEMU_ARGS_loongarch  = -M virt -append "console=ttyS0,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
-QEMU_ARGS            = $(QEMU_ARGS_$(ARCH))
+QEMU_ARGS_BIOS       = $(if $(BIOS),-bios $(BIOS))
+QEMU_ARGS            = $(QEMU_ARGS_$(ARCH)) $(QEMU_ARGS_BIOS)
 
 # OUTPUT is only set when run from the main makefile, otherwise
 # it defaults to this nolibc directory.
-- 
2.25.1