Merge tag 'pull-hv-balloon-20240308' of https://github.com/maciejsszmigiero/qemu into staging

Hyper-V Dynamic Memory and VMBus misc small patches

This pull request contains two small patches to hv-balloon:
the first one replacing alloca() usage with g_malloc0() + g_autofree
and the second one adding additional declaration of a protocol message
struct with an optional field explicitly defined to avoid a Coverity
warning.

Also included is a VMBus patch to print a warning when it is enabled
without the recommended set of Hyper-V features (enlightenments) since
some Windows versions crash at boot in this case.

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* tag 'pull-hv-balloon-20240308' of https://github.com/maciejsszmigiero/qemu:
  vmbus: Print a warning when enabled without the recommended set of features
  hv-balloon: define dm_hot_add_with_region to avoid Coverity warning
  hv-balloon: avoid alloca() usage

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

1 files changed, 8 insertions, 1 deletions

diff --git a/include/hw/hyperv/dynmem-proto.h b/include/hw/hyperv/dynmem-proto.h
index a657786a94..68b8b606f2 100644
--- a/include/hw/hyperv/dynmem-proto.h
+++ b/include/hw/hyperv/dynmem-proto.h
@@ -328,7 +328,8 @@ struct dm_unballoon_response {
 /*
  * Hot add request message. Message sent from the host to the guest.
  *
- * mem_range: Memory range to hot add.
+ * range: Memory range to hot add.
+ * region: Explicit hot add memory region for guest to use. Optional.
  *
  */
 
@@ -337,6 +338,12 @@ struct dm_hot_add {
     union dm_mem_page_range range;
 } QEMU_PACKED;
 
+struct dm_hot_add_with_region {
+    struct dm_header hdr;
+    union dm_mem_page_range range;
+    union dm_mem_page_range region;
+} QEMU_PACKED;
+
 /*
  * Hot add response message.
  * This message is sent by the guest to report the status of a hot add request.