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Hyper-V Dynamic Memory protocol driver.

Browse source 
This driver is like virtio-balloon on steroids for Windows guests:
 it allows both changing the guest memory allocation via ballooning and
 inserting pieces of extra RAM into it on demand from a provided memory
 backend via Windows-native Hyper-V Dynamic Memory protocol.
 
 * Preparatory patches to support empty memory devices and ones with
 large alignment requirements.
 
 * Revert of recently added "hw/virtio/virtio-pmem: Replace impossible
 check by assertion" commit 5960f254db since this series makes this
 situation possible again.
 
 * Protocol definitions.
 
 * Hyper-V DM protocol driver (hv-balloon) base (ballooning only).
 
 * Hyper-V DM protocol driver (hv-balloon) hot-add support.
 
 * qapi query-memory-devices support for the driver.
 
 * qapi HV_BALLOON_STATUS_REPORT event.
 
 * The relevant PC machine plumbing.
 
 * New MAINTAINERS entry for the above.
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Merge tag 'pull-hv-balloon-20231106' of https://github.com/maciejsszmigiero/qemu into staging

Hyper-V Dynamic Memory protocol driver.

This driver is like virtio-balloon on steroids for Windows guests:
it allows both changing the guest memory allocation via ballooning and
inserting pieces of extra RAM into it on demand from a provided memory
backend via Windows-native Hyper-V Dynamic Memory protocol.

* Preparatory patches to support empty memory devices and ones with
large alignment requirements.

* Revert of recently added "hw/virtio/virtio-pmem: Replace impossible
check by assertion" commit 5960f254db since this series makes this
situation possible again.

* Protocol definitions.

* Hyper-V DM protocol driver (hv-balloon) base (ballooning only).

* Hyper-V DM protocol driver (hv-balloon) hot-add support.

* qapi query-memory-devices support for the driver.

* qapi HV_BALLOON_STATUS_REPORT event.

* The relevant PC machine plumbing.

* New MAINTAINERS entry for the above.

# -----BEGIN PGP SIGNATURE-----
#
# iQGzBAABCAAdFiEE4ndqq6COJv9aG0oJUrHW6VHQzgcFAmVI81IACgkQUrHW6VHQ
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# QzLGACW1oK+LV41bekWAye7w9pShUtFaxffhPbJeZDDGh7q0x61R3Z3yKkA07p46
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# =RAb0
# -----END PGP SIGNATURE-----
# gpg: Signature made Mon 06 Nov 2023 22:08:18 HKT
# gpg:                using RSA key E2776AABA08E26FF5A1B4A0952B1D6E951D0CE07
# gpg: Good signature from "Maciej S. Szmigiero <mail@maciej.szmigiero.name>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 727A 0D4D DB9E D9F6 039B  ECEF 847F 5E37 90CE 0977
#      Subkey fingerprint: E277 6AAB A08E 26FF 5A1B  4A09 52B1 D6E9 51D0 CE07

* tag 'pull-hv-balloon-20231106' of https://github.com/maciejsszmigiero/qemu:
  MAINTAINERS: Add an entry for Hyper-V Dynamic Memory Protocol
  hw/i386/pc: Support hv-balloon
  qapi: Add HV_BALLOON_STATUS_REPORT event and its QMP query command
  qapi: Add query-memory-devices support to hv-balloon
  Add Hyper-V Dynamic Memory Protocol driver (hv-balloon) hot-add support
  Add Hyper-V Dynamic Memory Protocol driver (hv-balloon) base
  Add Hyper-V Dynamic Memory Protocol definitions
  memory-device: Drop size alignment check
  Revert "hw/virtio/virtio-pmem: Replace impossible check by assertion"
  memory-device: Support empty memory devices

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2023-11-07 09:41:42 +08:00
commit 17735e9371
26 changed files with 3180 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

1
tests/qtest/qmp-cmd-test.c
View file

@ -45,6 +45,7 @@ static int query_error_class(const char *cmd)
{ "query-acpi-ospm-status", ERROR_CLASS_GENERIC_ERROR },
{ "query-balloon", ERROR_CLASS_DEVICE_NOT_ACTIVE },
{ "query-hotpluggable-cpus", ERROR_CLASS_GENERIC_ERROR },
{ "query-hv-balloon-status-report", ERROR_CLASS_GENERIC_ERROR },
{ "query-vm-generation-id", ERROR_CLASS_GENERIC_ERROR },
/* Only valid with a USB bus added */
{ "x-query-usb", ERROR_CLASS_GENERIC_ERROR },