Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

virtio, pc, pci: fixes, cleanups, tests

A bunch of fixes all over the place.
ACPI tests will now run on more systems: might
introduce new failure reports but that's for
the best, isn't it?

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

# gpg: Signature made Fri 12 Jul 2019 15:57:40 BST
# gpg:                using RSA key 281F0DB8D28D5469
# 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

* remotes/mst/tags/for_upstream:
  virtio pmem: remove transitional names
  virtio pmem: remove memdev null check
  virtio pmem: fix wrong mem region condition
  tests: acpi: do not skip tests when IASL is not installed
  tests: acpi: do not require IASL for dumping AML blobs
  virtio-balloon: fix QEMU 4.0 config size migration incompatibility
  pcie: consistent names for function args
  xio3130_downstream: typo fix

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 25 insertions, 3 deletions

diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index 11fad86d64..e85d1c0d5c 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -615,6 +615,22 @@ virtio_balloon_free_page_report_notify(NotifierWithReturn *n, void *data)
     return 0;
 }
 
+static size_t virtio_balloon_config_size(VirtIOBalloon *s)
+{
+    uint64_t features = s->host_features;
+
+    if (s->qemu_4_0_config_size) {
+        return sizeof(struct virtio_balloon_config);
+    }
+    if (virtio_has_feature(features, VIRTIO_BALLOON_F_PAGE_POISON)) {
+        return sizeof(struct virtio_balloon_config);
+    }
+    if (virtio_has_feature(features, VIRTIO_BALLOON_F_FREE_PAGE_HINT)) {
+        return offsetof(struct virtio_balloon_config, poison_val);
+    }
+    return offsetof(struct virtio_balloon_config, free_page_report_cmd_id);
+}
+
 static void virtio_balloon_get_config(VirtIODevice *vdev, uint8_t *config_data)
 {
     VirtIOBalloon *dev = VIRTIO_BALLOON(vdev);
@@ -635,7 +651,7 @@ static void virtio_balloon_get_config(VirtIODevice *vdev, uint8_t *config_data)
     }
 
     trace_virtio_balloon_get_config(config.num_pages, config.actual);
-    memcpy(config_data, &config, sizeof(struct virtio_balloon_config));
+    memcpy(config_data, &config, virtio_balloon_config_size(dev));
 }
 
 static int build_dimm_list(Object *obj, void *opaque)
@@ -679,7 +695,7 @@ static void virtio_balloon_set_config(VirtIODevice *vdev,
     uint32_t oldactual = dev->actual;
     ram_addr_t vm_ram_size = get_current_ram_size();
 
-    memcpy(&config, config_data, sizeof(struct virtio_balloon_config));
+    memcpy(&config, config_data, virtio_balloon_config_size(dev));
     dev->actual = le32_to_cpu(config.actual);
     if (dev->actual != oldactual) {
         qapi_event_send_balloon_change(vm_ram_size -
@@ -766,7 +782,7 @@ static void virtio_balloon_device_realize(DeviceState *dev, Error **errp)
     int ret;
 
     virtio_init(vdev, "virtio-balloon", VIRTIO_ID_BALLOON,
-                sizeof(struct virtio_balloon_config));
+                virtio_balloon_config_size(s));
 
     ret = qemu_add_balloon_handler(virtio_balloon_to_target,
                                    virtio_balloon_stat, s);
@@ -897,6 +913,12 @@ static Property virtio_balloon_properties[] = {
                     VIRTIO_BALLOON_F_DEFLATE_ON_OOM, false),
     DEFINE_PROP_BIT("free-page-hint", VirtIOBalloon, host_features,
                     VIRTIO_BALLOON_F_FREE_PAGE_HINT, false),
+    /* QEMU 4.0 accidentally changed the config size even when free-page-hint
+     * is disabled, resulting in QEMU 3.1 migration incompatibility.  This
+     * property retains this quirk for QEMU 4.1 machine types.
+     */
+    DEFINE_PROP_BOOL("qemu-4-0-config-size", VirtIOBalloon,
+                     qemu_4_0_config_size, false),
     DEFINE_PROP_LINK("iothread", VirtIOBalloon, iothread, TYPE_IOTHREAD,
                      IOThread *),
     DEFINE_PROP_END_OF_LIST(),