pc,virtio: regression, test fixes

fixes regressions:
     virtio error message triggered by seabios
     failure in vhost due to VIRTIO_F_RING_RESET
     broken keyboard under seabios
 
 some biosbits test fixes
 
 there's still a known regression with migration and vsock,
 not fixed yet.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

pc,virtio: regression, test fixes

fixes regressions:
    virtio error message triggered by seabios
    failure in vhost due to VIRTIO_F_RING_RESET
    broken keyboard under seabios

some biosbits test fixes

there's still a known regression with migration and vsock,
not fixed yet.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

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# gpg: Signature made Tue 22 Nov 2022 05:22:06 EST
# gpg:                using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469
# gpg:                issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full]
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>" [full]
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu:
  virtio: disable error for out of spec queue-enable
  acpi/tests/avocado/bits: keep the work directory when BITS_DEBUG is set in env
  tests/avocado: configure acpi-bits to use avocado timeout
  MAINTAINERS: add mst to list of biosbits maintainers
  tests: acpi: x86: update expected DSDT after moving PRQx fields in _SB scope
  acpi: x86: move RPQx field back to _SB scope
  tests: acpi: whitelist DSDT before moving PRQx to _SB scope
  vhost: mask VIRTIO_F_RING_RESET for vhost and vhost-user devices

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

tests/avocado/acpi-bits.py

@@ -263,7 +263,7 @@ class AcpiBitsTest(QemuBaseTest): #pylint: disable=too-many-instance-attributes
         self.logger.info('using grub-mkrescue for generating biosbits iso ...')
 
         try:
-            if os.getenv('V'):
+            if os.getenv('V') or os.getenv('BITS_DEBUG'):
                 subprocess.check_call([mkrescue_script, '-o', iso_file,
                                        bits_dir], stderr=subprocess.STDOUT)
             else:
@@ -347,7 +347,7 @@ class AcpiBitsTest(QemuBaseTest): #pylint: disable=too-many-instance-attributes
                 self._print_log(log)
                 raise e
             else:
-                if os.getenv('V'):
+                if os.getenv('V') or os.getenv('BITS_DEBUG'):
                     self._print_log(log)
 
     def tearDown(self):
@@ -356,8 +356,13 @@ class AcpiBitsTest(QemuBaseTest): #pylint: disable=too-many-instance-attributes
         """
         if self._vm:
             self.assertFalse(not self._vm.is_running)
-        self.logger.info('removing the work directory %s', self._workDir)
-        shutil.rmtree(self._workDir)
+        if not os.getenv('BITS_DEBUG'):
+            self.logger.info('removing the work directory %s', self._workDir)
+            shutil.rmtree(self._workDir)
+        else:
+            self.logger.info('not removing the work directory %s ' \
+                             'as BITS_DEBUG is ' \
+                             'passed in the environment', self._workDir)
         super().tearDown()
 
     def test_acpi_smbios_bits(self):
@@ -388,12 +393,6 @@ class AcpiBitsTest(QemuBaseTest): #pylint: disable=too-many-instance-attributes
         self._vm.launch()
         # biosbits has been configured to run all the specified test suites
         # in batch mode and then automatically initiate a vm shutdown.
-        # sleep for maximum of one minute
-        max_sleep_time = time.monotonic() + 60
-        while self._vm.is_running() and time.monotonic() < max_sleep_time:
-            time.sleep(1)
-
-        self.assertFalse(time.monotonic() > max_sleep_time,
-                         'The VM seems to have failed to shutdown in time')
-
+        # Rely on avocado's unit test timeout.
+        self._vm.wait(timeout=None)
         self.parse_log()