diff --git a/poky/scripts/lib/buildstats.py b/poky/scripts/lib/buildstats.py
index 3b76286..fa94c65 100644
--- a/poky/scripts/lib/buildstats.py
+++ b/poky/scripts/lib/buildstats.py
@@ -79,8 +79,8 @@
             return self['rusage']['ru_oublock']
 
     @classmethod
-    def from_file(cls, buildstat_file):
-        """Read buildstat text file"""
+    def from_file(cls, buildstat_file, fallback_end=0):
+        """Read buildstat text file. fallback_end is an optional end time for tasks that are not recorded as finishing."""
         bs_task = cls()
         log.debug("Reading task buildstats from %s", buildstat_file)
         end_time = None
@@ -108,7 +108,10 @@
                     bs_task[ru_type][ru_key] = val
                 elif key == 'Status':
                     bs_task['status'] = val
-        if end_time is not None and start_time is not None:
+        # If the task didn't finish, fill in the fallback end time if specified
+        if start_time and not end_time and fallback_end:
+            end_time = fallback_end
+        if start_time and end_time:
             bs_task['elapsed_time'] = end_time - start_time
         else:
             raise BSError("{} looks like a invalid buildstats file".format(buildstat_file))
@@ -226,15 +229,33 @@
         epoch = match.group('epoch')
         return name, epoch, version, revision
 
+    @staticmethod
+    def parse_top_build_stats(path):
+        """
+        Parse the top-level build_stats file for build-wide start and duration.
+        """
+        with open(path) as fobj:
+            for line in fobj.readlines():
+                key, val = line.split(':', 1)
+                val = val.strip()
+                if key == 'Build Started':
+                    start = float(val)
+                elif key == "Elapsed time":
+                    elapsed = float(val.split()[0])
+        return start, elapsed
+
     @classmethod
     def from_dir(cls, path):
         """Load buildstats from a buildstats directory"""
-        if not os.path.isfile(os.path.join(path, 'build_stats')):
+        top_stats = os.path.join(path, 'build_stats')
+        if not os.path.isfile(top_stats):
             raise BSError("{} does not look like a buildstats directory".format(path))
 
         log.debug("Reading buildstats directory %s", path)
-
         buildstats = cls()
+        build_started, build_elapsed = buildstats.parse_top_build_stats(top_stats)
+        build_end = build_started + build_elapsed
+
         subdirs = os.listdir(path)
         for dirname in subdirs:
             recipe_dir = os.path.join(path, dirname)
@@ -244,7 +265,7 @@
             bsrecipe = BSRecipe(name, epoch, version, revision)
             for task in os.listdir(recipe_dir):
                 bsrecipe.tasks[task] = BSTask.from_file(
-                    os.path.join(recipe_dir, task))
+                    os.path.join(recipe_dir, task), build_end)
             if name in buildstats:
                 raise BSError("Cannot handle multiple versions of the same "
                               "package ({})".format(name))
diff --git a/poky/scripts/lib/checklayer/cases/common.py b/poky/scripts/lib/checklayer/cases/common.py
index 722d3cf..97b16f7 100644
--- a/poky/scripts/lib/checklayer/cases/common.py
+++ b/poky/scripts/lib/checklayer/cases/common.py
@@ -72,6 +72,21 @@
                 self.tc.layer['name'])
             self.fail('\n'.join(msg))
 
+    @unittest.expectedFailure
+    def test_patches_upstream_status(self):
+        import sys
+        sys.path.append(os.path.join(sys.path[0], '../../../../meta/lib/'))
+        import oe.qa
+        patches = []
+        for dirpath, dirs, files in os.walk(self.tc.layer['path']):
+            for filename in files:
+                if filename.endswith(".patch"):
+                    ppath = os.path.join(dirpath, filename)
+                    if oe.qa.check_upstream_status(ppath):
+                        patches.append(ppath)
+        self.assertEqual(len(patches), 0 , \
+                msg="Found following patches with malformed or missing upstream status:\n%s" % '\n'.join([str(patch) for patch in patches]))
+
     def test_signatures(self):
         if self.tc.layer['type'] == LayerType.SOFTWARE and \
            not self.tc.test_software_layer_signatures:
diff --git a/poky/scripts/lib/devtool/standard.py b/poky/scripts/lib/devtool/standard.py
index d64e18e..0339d12 100644
--- a/poky/scripts/lib/devtool/standard.py
+++ b/poky/scripts/lib/devtool/standard.py
@@ -567,6 +567,7 @@
         logger.debug('writing append file %s' % appendfile)
         with open(appendfile, 'a') as f:
             f.write('###--- _extract_source\n')
+            f.write('ERROR_QA:remove = "patch-fuzz"\n')
             f.write('DEVTOOL_TEMPDIR = "%s"\n' % tempdir)
             f.write('DEVTOOL_DEVBRANCH = "%s"\n' % devbranch)
             if not is_kernel_yocto:
diff --git a/poky/scripts/lib/resulttool/regression.py b/poky/scripts/lib/resulttool/regression.py
index 9f95295..74fd5f3 100644
--- a/poky/scripts/lib/resulttool/regression.py
+++ b/poky/scripts/lib/resulttool/regression.py
@@ -7,11 +7,173 @@
 #
 
 import resulttool.resultutils as resultutils
-import json
 
 from oeqa.utils.git import GitRepo
 import oeqa.utils.gitarchive as gitarchive
 
+METADATA_MATCH_TABLE = {
+    "oeselftest": "OESELFTEST_METADATA"
+}
+
+OESELFTEST_METADATA_GUESS_TABLE={
+    "trigger-build-posttrigger": {
+        "run_all_tests": False,
+        "run_tests":["buildoptions.SourceMirroring.test_yocto_source_mirror"],
+        "skips": None,
+        "machine": None,
+        "select_tags":None,
+        "exclude_tags": None
+    },
+    "reproducible": {
+        "run_all_tests": False,
+        "run_tests":["reproducible"],
+        "skips": None,
+        "machine": None,
+        "select_tags":None,
+        "exclude_tags": None
+    },
+    "arch-qemu-quick": {
+        "run_all_tests": True,
+        "run_tests":None,
+        "skips": None,
+        "machine": None,
+        "select_tags":["machine"],
+        "exclude_tags": None
+    },
+    "arch-qemu-full-x86-or-x86_64": {
+        "run_all_tests": True,
+        "run_tests":None,
+        "skips": None,
+        "machine": None,
+        "select_tags":["machine", "toolchain-system"],
+        "exclude_tags": None
+    },
+    "arch-qemu-full-others": {
+        "run_all_tests": True,
+        "run_tests":None,
+        "skips": None,
+        "machine": None,
+        "select_tags":["machine", "toolchain-user"],
+        "exclude_tags": None
+    },
+    "selftest": {
+        "run_all_tests": True,
+        "run_tests":None,
+        "skips": ["distrodata.Distrodata.test_checkpkg", "buildoptions.SourceMirroring.test_yocto_source_mirror", "reproducible"],
+        "machine": None,
+        "select_tags":None,
+        "exclude_tags": ["machine", "toolchain-system", "toolchain-user"]
+    },
+    "bringup": {
+        "run_all_tests": True,
+        "run_tests":None,
+        "skips": ["distrodata.Distrodata.test_checkpkg", "buildoptions.SourceMirroring.test_yocto_source_mirror"],
+        "machine": None,
+        "select_tags":None,
+        "exclude_tags": ["machine", "toolchain-system", "toolchain-user"]
+    }
+}
+
+def test_has_at_least_one_matching_tag(test, tag_list):
+    return "oetags" in test and any(oetag in tag_list for oetag in test["oetags"])
+
+def all_tests_have_at_least_one_matching_tag(results, tag_list):
+    return all(test_has_at_least_one_matching_tag(test_result, tag_list) or test_name.startswith("ptestresult") for (test_name, test_result) in results.items())
+
+def any_test_have_any_matching_tag(results, tag_list):
+    return any(test_has_at_least_one_matching_tag(test, tag_list) for test in results.values())
+
+def have_skipped_test(result, test_prefix):
+    return all( result[test]['status'] == "SKIPPED" for test in result if test.startswith(test_prefix))
+
+def have_all_tests_skipped(result, test_prefixes_list):
+    return all(have_skipped_test(result, test_prefix) for test_prefix in test_prefixes_list)
+
+def guess_oeselftest_metadata(results):
+    """
+    When an oeselftest test result is lacking OESELFTEST_METADATA, we can try to guess it based on results content.
+    Check results for specific values (absence/presence of oetags, number and name of executed tests...),
+    and if it matches one of known configuration from autobuilder configuration, apply guessed OSELFTEST_METADATA
+    to it to allow proper test filtering.
+    This guessing process is tightly coupled to config.json in autobuilder. It should trigger less and less,
+    as new tests will have OESELFTEST_METADATA properly appended at test reporting time
+    """
+
+    if len(results) == 1 and "buildoptions.SourceMirroring.test_yocto_source_mirror" in results:
+        return OESELFTEST_METADATA_GUESS_TABLE['trigger-build-posttrigger']
+    elif all(result.startswith("reproducible") for result in results):
+        return OESELFTEST_METADATA_GUESS_TABLE['reproducible']
+    elif all_tests_have_at_least_one_matching_tag(results, ["machine"]):
+        return OESELFTEST_METADATA_GUESS_TABLE['arch-qemu-quick']
+    elif all_tests_have_at_least_one_matching_tag(results, ["machine", "toolchain-system"]):
+        return OESELFTEST_METADATA_GUESS_TABLE['arch-qemu-full-x86-or-x86_64']
+    elif all_tests_have_at_least_one_matching_tag(results, ["machine", "toolchain-user"]):
+        return OESELFTEST_METADATA_GUESS_TABLE['arch-qemu-full-others']
+    elif not any_test_have_any_matching_tag(results, ["machine", "toolchain-user", "toolchain-system"]):
+        if have_all_tests_skipped(results, ["distrodata.Distrodata.test_checkpkg", "buildoptions.SourceMirroring.test_yocto_source_mirror", "reproducible"]):
+            return OESELFTEST_METADATA_GUESS_TABLE['selftest']
+        elif have_all_tests_skipped(results, ["distrodata.Distrodata.test_checkpkg", "buildoptions.SourceMirroring.test_yocto_source_mirror"]):
+            return OESELFTEST_METADATA_GUESS_TABLE['bringup']
+
+    return None
+
+
+def metadata_matches(base_configuration, target_configuration):
+    """
+    For passed base and target, check test type. If test type matches one of
+    properties described in METADATA_MATCH_TABLE, compare metadata if it is
+    present in base. Return true if metadata matches, or if base lacks some
+    data (either TEST_TYPE or the corresponding metadata)
+    """
+    test_type = base_configuration.get('TEST_TYPE')
+    if test_type not in METADATA_MATCH_TABLE:
+        return True
+
+    metadata_key = METADATA_MATCH_TABLE.get(test_type)
+    if target_configuration.get(metadata_key) != base_configuration.get(metadata_key):
+        return False
+
+    return True
+
+
+def machine_matches(base_configuration, target_configuration):
+    return base_configuration.get('MACHINE') == target_configuration.get('MACHINE')
+
+
+def can_be_compared(logger, base, target):
+    """
+    Some tests are not relevant to be compared, for example some oeselftest
+    run with different tests sets or parameters. Return true if tests can be
+    compared
+    """
+    ret = True
+    base_configuration = base['configuration']
+    target_configuration = target['configuration']
+
+    # Older test results lack proper OESELFTEST_METADATA: if not present, try to guess it based on tests results.
+    if base_configuration.get('TEST_TYPE') == 'oeselftest' and 'OESELFTEST_METADATA' not in base_configuration:
+        guess = guess_oeselftest_metadata(base['result'])
+        if guess is None:
+            logger.error(f"ERROR: did not manage to guess oeselftest metadata for {base_configuration['STARTTIME']}")
+        else:
+            logger.debug(f"Enriching {base_configuration['STARTTIME']} with {guess}")
+            base_configuration['OESELFTEST_METADATA'] = guess
+    if target_configuration.get('TEST_TYPE') == 'oeselftest' and 'OESELFTEST_METADATA' not in target_configuration:
+        guess = guess_oeselftest_metadata(target['result'])
+        if guess is None:
+            logger.error(f"ERROR: did not manage to guess oeselftest metadata for {target_configuration['STARTTIME']}")
+        else:
+            logger.debug(f"Enriching {target_configuration['STARTTIME']} with {guess}")
+            target_configuration['OESELFTEST_METADATA'] = guess
+
+    # Test runs with LTP results in should only be compared with other runs with LTP tests in them
+    if base_configuration.get('TEST_TYPE') == 'runtime' and any(result.startswith("ltpresult") for result in base['result']):
+        ret = target_configuration.get('TEST_TYPE') == 'runtime' and any(result.startswith("ltpresult") for result in target['result'])
+
+    return ret and metadata_matches(base_configuration, target_configuration) \
+        and machine_matches(base_configuration, target_configuration)
+
+
 def compare_result(logger, base_name, target_name, base_result, target_result):
     base_result = base_result.get('result')
     target_result = target_result.get('result')
@@ -62,6 +224,8 @@
             # removing any pairs which match
             for c in base.copy():
                 for b in target.copy():
+                    if not can_be_compared(logger, base_results[a][c], target_results[a][b]):
+                        continue
                     res, resstr = compare_result(logger, c, b, base_results[a][c], target_results[a][b])
                     if not res:
                         matches.append(resstr)
@@ -71,6 +235,8 @@
             # Should only now see regressions, we may not be able to match multiple pairs directly
             for c in base:
                 for b in target:
+                    if not can_be_compared(logger, base_results[a][c], target_results[a][b]):
+                        continue
                     res, resstr = compare_result(logger, c, b, base_results[a][c], target_results[a][b])
                     if res:
                         regressions.append(resstr)
@@ -82,6 +248,24 @@
 
     return 0
 
+# Some test case naming is poor and contains random strings, particularly lttng/babeltrace.
+# Truncating the test names works since they contain file and line number identifiers
+# which allows us to match them without the random components.
+def fixup_ptest_names(results, logger):
+    for r in results:
+        for i in results[r]:
+            tests = list(results[r][i]['result'].keys())
+            for test in tests:
+                new = None
+                if test.startswith(("ptestresult.lttng-tools.", "ptestresult.babeltrace.", "ptestresult.babeltrace2")) and "_-_" in test:
+                    new = test.split("_-_")[0]
+                elif test.startswith(("ptestresult.curl.")) and "__" in test:
+                    new = test.split("__")[0]
+                if new:
+                    results[r][i]['result'][new] = results[r][i]['result'][test]
+                    del results[r][i]['result'][test]
+
+
 def regression_git(args, logger):
     base_results = {}
     target_results = {}
@@ -143,6 +327,9 @@
     base_results = resultutils.git_get_result(repo, revs[index1][2])
     target_results = resultutils.git_get_result(repo, revs[index2][2])
 
+    fixup_ptest_names(base_results, logger)
+    fixup_ptest_names(target_results, logger)
+
     regression_common(args, logger, base_results, target_results)
 
     return 0
diff --git a/poky/scripts/lib/wic/partition.py b/poky/scripts/lib/wic/partition.py
index 2a916e0..382afa4 100644
--- a/poky/scripts/lib/wic/partition.py
+++ b/poky/scripts/lib/wic/partition.py
@@ -133,6 +133,8 @@
             self.update_fstab_in_rootfs = True
 
         if not self.source:
+            if self.fstype == "none":
+                return
             if not self.size and not self.fixed_size:
                 raise WicError("The %s partition has a size of zero. Please "
                                "specify a non-zero --size/--fixed-size for that "
@@ -405,6 +407,9 @@
                        (extraopts, self.fsuuid, rootfs, rootfs_dir)
         exec_native_cmd(erofs_cmd, native_sysroot, pseudo=pseudo)
 
+    def prepare_empty_partition_none(self, rootfs, oe_builddir, native_sysroot):
+        pass
+
     def prepare_empty_partition_ext(self, rootfs, oe_builddir,
                                     native_sysroot):
         """
diff --git a/poky/scripts/lib/wic/plugins/source/bootimg-efi.py b/poky/scripts/lib/wic/plugins/source/bootimg-efi.py
index 4b00913..d6aeab2 100644
--- a/poky/scripts/lib/wic/plugins/source/bootimg-efi.py
+++ b/poky/scripts/lib/wic/plugins/source/bootimg-efi.py
@@ -221,7 +221,7 @@
             elif source_params['loader'] == 'systemd-boot':
                 cls.do_configure_systemdboot(hdddir, creator, cr_workdir, source_params)
             elif source_params['loader'] == 'uefi-kernel':
-                return
+                pass
             else:
                 raise WicError("unrecognized bootimg-efi loader: %s" % source_params['loader'])
         except KeyError: