Revision tags: v9.2.0, v9.1.2, v9.1.1, v9.1.0 |
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17735e93 |
| 06-Nov-2023 |
Stefan Hajnoczi <stefanha@redhat.com> |
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 gues
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 5960f254dbb4 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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* 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>
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259ebed4 |
| 23-Aug-2023 |
Maciej S. Szmigiero <maciej.szmigiero@oracle.com> |
qapi: Add HV_BALLOON_STATUS_REPORT event and its QMP query command
Used by the hv-balloon driver for (optional) guest memory status reports.
Acked-by: David Hildenbrand <david@redhat.com> Signed-of
qapi: Add HV_BALLOON_STATUS_REPORT event and its QMP query command
Used by the hv-balloon driver for (optional) guest memory status reports.
Acked-by: David Hildenbrand <david@redhat.com> Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
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99a4706a |
| 22-Oct-2023 |
Maciej S. Szmigiero <maciej.szmigiero@oracle.com> |
Add Hyper-V Dynamic Memory Protocol driver (hv-balloon) hot-add support
One of advantages of using this protocol over ACPI-based PC DIMM hotplug is that it allows hot-adding memory in much smaller g
Add Hyper-V Dynamic Memory Protocol driver (hv-balloon) hot-add support
One of advantages of using this protocol over ACPI-based PC DIMM hotplug is that it allows hot-adding memory in much smaller granularity because the ACPI DIMM slot limit does not apply.
In order to enable this functionality a new memory backend needs to be created and provided to the driver via the "memdev" parameter.
This can be achieved by, for example, adding "-object memory-backend-ram,id=mem1,size=32G" to the QEMU command line and then instantiating the driver with "memdev=mem1" parameter.
The device will try to use multiple memslots to cover the memory backend in order to reduce the size of metadata for the not-yet-hot-added part of the memory backend.
Co-developed-by: David Hildenbrand <david@redhat.com> Acked-by: David Hildenbrand <david@redhat.com> Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
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#
0d9e8c0b |
| 12-Jun-2023 |
Maciej S. Szmigiero <maciej.szmigiero@oracle.com> |
Add Hyper-V Dynamic Memory Protocol driver (hv-balloon) base
This driver is like virtio-balloon on steroids: it allows both changing the guest memory allocation via ballooning and (in the next patch
Add Hyper-V Dynamic Memory Protocol driver (hv-balloon) base
This driver is like virtio-balloon on steroids: it allows both changing the guest memory allocation via ballooning and (in the next patch) inserting pieces of extra RAM into it on demand from a provided memory backend.
The actual resizing is done via ballooning interface (for example, via the "balloon" HMP command). This includes resizing the guest past its boot size - that is, hot-adding additional memory in granularity limited only by the guest alignment requirements, as provided by the next patch.
In contrast with ACPI DIMM hotplug where one can only request to unplug a whole DIMM stick this driver allows removing memory from guest in single page (4k) units via ballooning.
After a VM reboot the guest is back to its original (boot) size.
In the future, the guest boot memory size might be changed on reboot instead, taking into account the effective size that VM had before that reboot (much like Hyper-V does).
For performance reasons, the guest-released memory is tracked in a few range trees, as a series of (start, count) ranges. Each time a new page range is inserted into such tree its neighbors are checked as candidates for possible merging with it.
Besides performance reasons, the Dynamic Memory protocol itself uses page ranges as the data structure in its messages, so relevant pages need to be merged into such ranges anyway.
One has to be careful when tracking the guest-released pages, since the guest can maliciously report returning pages outside its current address space, which later clash with the address range of newly added memory. Similarly, the guest can report freeing the same page twice.
The above design results in much better ballooning performance than when using virtio-balloon with the same guest: 230 GB / minute with this driver versus 70 GB / minute with virtio-balloon.
During a ballooning operation most of time is spent waiting for the guest to come up with newly freed page ranges, processing the received ranges on the host side (in QEMU and KVM) is nearly instantaneous.
The unballoon operation is also pretty much instantaneous: thanks to the merging of the ballooned out page ranges 200 GB of memory can be returned to the guest in about 1 second. With virtio-balloon this operation takes about 2.5 minutes.
These tests were done against a Windows Server 2019 guest running on a Xeon E5-2699, after dirtying the whole memory inside guest before each balloon operation.
Using a range tree instead of a bitmap to track the removed memory also means that the solution scales well with the guest size: even a 1 TB range takes just a few bytes of such metadata.
Since the required GTree operations aren't present in every Glib version a check for them was added to the meson build script, together with new "--enable-hv-balloon" and "--disable-hv-balloon" configure arguments. If these GTree operations are missing in the system's Glib version this driver will be skipped during QEMU build.
An optional "status-report=on" device parameter requests memory status events from the guest (typically sent every second), which allow the host to learn both the guest memory available and the guest memory in use counts.
Following commits will add support for their external emission as "HV_BALLOON_STATUS_REPORT" QMP events.
The driver is named hv-balloon since the Linux kernel client driver for the Dynamic Memory Protocol is named as such and to follow the naming pattern established by the virtio-balloon driver. The whole protocol runs over Hyper-V VMBus.
The driver was tested against Windows Server 2012 R2, Windows Server 2016 and Windows Server 2019 guests and obeys the guest alignment requirements reported to the host via DM_CAPABILITIES_REPORT message.
Acked-by: David Hildenbrand <david@redhat.com> Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
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Revision tags: v8.0.0, v7.2.0 |
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#
1be5a765 |
| 19-Apr-2022 |
Richard Henderson <richard.henderson@linaro.org> |
Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging
* Add cpu0-id to query-sev-capabilities * whpx support for breakpoints and stepping * initial support for Hyper-V Synthetic D
Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging
* Add cpu0-id to query-sev-capabilities * whpx support for breakpoints and stepping * initial support for Hyper-V Synthetic Debugging * use monotonic clock for QemuCond and QemuSemaphore * Remove qemu-common.h include from most units and lots of other clenaups * do not include headers for all virtio devices in virtio-ccw.h
# -----BEGIN PGP SIGNATURE----- # # iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmJXCQAUHHBib256aW5p # QHJlZGhhdC5jb20ACgkQv/vSX3jHroNT6wf+NHDJUEdDiwaVGVTGXgHuiaycsymi # FpNPiw/+XxSGN5xF3fkUGgqaDrcwIYwVfnXlghKSz8kp1cP3cjxa5CzNMLGTp5je # N6BxFbD7yC6dhagGm3mj32jlsptv3M38OHqKc3t+RaUAotP5RF2VdCyfUBLG6vU0 # aMzvMfMtB5aG0D8Fr5EV63t1JMTceFU0YxsG73UCFs2Yx4Z0cGBbNxMbHweRhd1q # tPeVDS46MFPM3/2cGGHpeeqxkoCTU7A9j1VuNQI3k+Kg+6W5YVxiK/UP7bw77E/a # yAHsmIVTNro8ajMBch73weuHtGtdfFLvCKc6QX6aVjzK4dF1voQ01E7gPQ== # =rMle # -----END PGP SIGNATURE----- # gpg: Signature made Wed 13 Apr 2022 10:31:44 AM PDT # gpg: using RSA key F13338574B662389866C7682BFFBD25F78C7AE83 # gpg: issuer "pbonzini@redhat.com" # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [undefined] # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" [undefined] # 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: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1 # Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83
* tag 'for-upstream' of https://gitlab.com/bonzini/qemu: (53 commits) target/i386: Remove unused XMMReg, YMMReg types and CPUState fields target/i386: do not access beyond the low 128 bits of SSE registers virtio-ccw: do not include headers for all virtio devices virtio-ccw: move device type declarations to .c files virtio-ccw: move vhost_ccw_scsi to a separate file s390x: follow qdev tree to detect SCSI device on a CCW bus hw: hyperv: Initial commit for Synthetic Debugging device hyperv: Add support to process syndbg commands hyperv: Add definitions for syndbg hyperv: SControl is optional to enable SynIc thread-posix: optimize qemu_sem_timedwait with zero timeout thread-posix: implement Semaphore with QemuCond and QemuMutex thread-posix: use monotonic clock for QemuCond and QemuSemaphore thread-posix: remove the posix semaphore support whpx: Added support for breakpoints and stepping build-sys: simplify AF_VSOCK check build-sys: drop ntddscsi.h check Remove qemu-common.h include from most units qga: remove explicit environ argument from exec/spawn Move fcntl_setfl() to oslib-posix ...
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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Revision tags: v7.0.0 |
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d8701185 |
| 16-Feb-2022 |
Jon Doron <arilou@gmail.com> |
hw: hyperv: Initial commit for Synthetic Debugging device
Signed-off-by: Jon Doron <arilou@gmail.com> Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com> Message-Id: <20220216102500.692781
hw: hyperv: Initial commit for Synthetic Debugging device
Signed-off-by: Jon Doron <arilou@gmail.com> Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com> Message-Id: <20220216102500.692781-5-arilou@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Revision tags: v6.2.0, v6.1.0, v5.2.0 |
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7fd51e68 |
| 21-Aug-2020 |
Peter Maydell <peter.maydell@linaro.org> |
Merge remote-tracking branch 'remotes/bonzini-gitlab/tags/for-upstream' into staging
New build system, with "fake in-tree builds" support.
Missing: * converting configure tests * converting unit te
Merge remote-tracking branch 'remotes/bonzini-gitlab/tags/for-upstream' into staging
New build system, with "fake in-tree builds" support.
Missing: * converting configure tests * converting unit tests * converting some remaining parts of the installation
# gpg: Signature made Fri 21 Aug 2020 11:33:35 BST # gpg: using RSA key F13338574B662389866C7682BFFBD25F78C7AE83 # gpg: issuer "pbonzini@redhat.com" # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full] # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" [full] # Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1 # Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83
* remotes/bonzini-gitlab/tags/for-upstream: (152 commits) docs: convert build system documentation to rST meson: update build-system documentation meson: avoid unstable module warning with Meson 0.56.0 or newer meson: convert po/ meson: convert VNC and dependent libraries to meson meson: move SDL and SDL-image detection to meson meson: convert sample plugins meson: replace create-config with meson configure_file rules.mak: drop unneeded macros meson: convert check-block meson: build texi doc docs: automatically track manual dependencies meson: sphinx-build remove Makefile.target rules.mak: remove version.o meson: convert systemtap files configure: place compatibility symlinks in target directories meson: link emulators without Makefile.target meson: plugins meson: cpu-emu ...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Revision tags: v5.0.0, v4.2.0 |
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cc4d76a3 |
| 16-Aug-2019 |
Marc-André Lureau <marcandre.lureau@redhat.com> |
meson: convert hw/hyperv
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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