test: Allow vboot tests to run in parallel

Update the tests to use separate working directories, so we can run them
in parallel. It also makes it possible to see the individual output files
after the tests have completed.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/test/py/tests/test_vboot.py b/test/py/tests/test_vboot.py
index 6dff677..095e00c 100644
--- a/test/py/tests/test_vboot.py
+++ b/test/py/tests/test_vboot.py
@@ -24,6 +24,7 @@
 Tests run with both SHA1 and SHA256 hashing.
 """
 
+import os
 import shutil
 import struct
 import pytest
@@ -34,16 +35,16 @@
 # Only run the full suite on a few combinations, since it doesn't add any more
 # test coverage.
 TESTDATA = [
-    ['sha1', '', None, False, True],
-    ['sha1', '', '-E -p 0x10000', False, False],
-    ['sha1', '-pss', None, False, False],
-    ['sha1', '-pss', '-E -p 0x10000', False, False],
-    ['sha256', '', None, False, False],
-    ['sha256', '', '-E -p 0x10000', False, False],
-    ['sha256', '-pss', None, False, False],
-    ['sha256', '-pss', '-E -p 0x10000', False, False],
-    ['sha256', '-pss', None, True, False],
-    ['sha256', '-pss', '-E -p 0x10000', True, True],
+    ['sha1-basic', 'sha1', '', None, False, True],
+    ['sha1-pad', 'sha1', '', '-E -p 0x10000', False, False],
+    ['sha1-pss', 'sha1', '-pss', None, False, False],
+    ['sha1-pss-pad', 'sha1', '-pss', '-E -p 0x10000', False, False],
+    ['sha256-basic', 'sha256', '', None, False, False],
+    ['sha256-pad', 'sha256', '', '-E -p 0x10000', False, False],
+    ['sha256-pss', 'sha256', '-pss', None, False, False],
+    ['sha256-pss-pad', 'sha256', '-pss', '-E -p 0x10000', False, False],
+    ['sha256-pss-required', 'sha256', '-pss', None, True, False],
+    ['sha256-pss-pad-required', 'sha256', '-pss', '-E -p 0x10000', True, True],
 ]
 
 @pytest.mark.boardspec('sandbox')
@@ -52,9 +53,9 @@
 @pytest.mark.requiredtool('fdtget')
 @pytest.mark.requiredtool('fdtput')
 @pytest.mark.requiredtool('openssl')
-@pytest.mark.parametrize("sha_algo,padding,sign_options,required,full_test",
+@pytest.mark.parametrize("name,sha_algo,padding,sign_options,required,full_test",
                          TESTDATA)
-def test_vboot(u_boot_console, sha_algo, padding, sign_options, required,
+def test_vboot(u_boot_console, name, sha_algo, padding, sign_options, required,
                full_test):
     """Test verified boot signing with mkimage and verification with 'bootm'.
 
@@ -365,7 +366,9 @@
         run_bootm(sha_algo, 'multi required key', '', False)
 
     cons = u_boot_console
-    tmpdir = cons.config.result_dir + '/'
+    tmpdir = os.path.join(cons.config.result_dir, name) + '/'
+    if not os.path.exists(tmpdir):
+        os.mkdir(tmpdir)
     datadir = cons.config.source_dir + '/test/py/tests/vboot/'
     fit = '%stest.fit' % tmpdir
     mkimage = cons.config.build_dir + '/tools/mkimage'