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2014-06-19Add vhost-user as a vhost backend.Nikolay Nikolaev
The initialization takes a chardev backed by a unix domain socket. It should implement qemu_fe_set_msgfds in order to be able to pass file descriptors to the remote process. Each ioctl request of vhost-kernel has a vhost-user message equivalent, which is sent over the control socket. The general approach is to copy the data from the supplied argument pointer to a designated field in the message. If a file descriptor is to be passed it will be placed in the fds array for inclusion in the sendmsg control header. VHOST_SET_MEM_TABLE ignores the supplied vhost_memory structure and scans the global ram_list for ram blocks with a valid fd field set. This would be set when the '-object memory-file' option with share=on property is used. Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com> Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19Add vhost-backend and VhostBackendTypeNikolay Nikolaev
Use vhost_set_backend_type to initialise a proper vhost_ops structure. In vhost_net_init and vhost_net_start_one call conditionally TAP related initialisation depending on the vhost backend type. Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com> Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19Add vhost_ops to vhost_dev struct and replace all relevant ioctlsNikolay Nikolaev
Decouple vhost from the Linux kernel by introducing vhost_ops. The intention is to provide different backends - a 'kernel' backend based on the ioctl interface, and an 'user' backend based on a UNIX domain socket and shared memory interface. Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com> Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19vhost_net_init will use VhostNetOptions to get all its argumentsNikolay Nikolaev
vhost_dev_init will replace devfd and devpath with a single opaque argument. This is initialised with a file descriptor. When TAP is used (through vhost_net), open /dev/vhost-net and pass the fd as an opaque parameter in VhostNetOptions. The same applies to vhost-scsi - open /dev/vhost-scsi and pass the fd. Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com> Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19Refactor virtio-net to use generic get_vhost_netNikolay Nikolaev
This decouples virtio-net from the TAP netdev backend and allows support for other backends to be implemented. Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com> Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19vhost_net should call the poll callback only when it is setNikolay Nikolaev
The poll callback needs to be called when bringing up or down the vhost_net instance. As it is not mandatory for an NetClient to implement it, invoke it only when it is set. Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com> Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19vhost: add vhost_get_features and vhost_ack_featuresNikolay Nikolaev
Generalize the features get/ack to be used for both vhost-net and vhost-scsi. In vhost-net add vhost_net_get_feature_bits to select the feature bit set depending on the NetClient kind. Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19Add G_IO_HUP handler for socket chardevNikolay Nikolaev
This is used to detect that the remote end has disconnected. Just call tcp_char_disconnect on receiving this event. Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com> Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19Add chardev API qemu_chr_fe_get_msgfdsNikolay Nikolaev
This extends the existing qemu_chr_fe_get_msgfd by allowing to read a set of fds. The function for receiving the fds - unix_process_msgfd is extended to allocate the needed array size. Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com> Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19Add chardev API qemu_chr_fe_set_msgfdsNikolay Nikolaev
This will set an array of file descriptors to the internal structures. The next time a message is send the array will be send as ancillary data. This feature works on the UNIX domain socket backend only. Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com> Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19Add chardev API qemu_chr_fe_read_allNikolay Nikolaev
This function will attempt to read data from the chardev trying to fill the buffer up to the given length. Add tcp_chr_disconnect to reuse disconnection code where needed. Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com> Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19Add kvm_eventfds_enabled functionNikolay Nikolaev
Add a function to check if the eventfd capability is present in KVM in the host kernel. Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com> Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19virtio-net: announce self by guestJason Wang
It's hard to track all mac addresses and their configurations (e.g vlan or ipv6) in qemu. Without this information, it's impossible to build proper garp packet after migration. The only possible solution to this is let guest (who knows all configurations) to do this. So, this patch introduces a new readonly config status bit of virtio-net, VIRTIO_NET_S_ANNOUNCE which is used to notify guest to announce presence of its link through config update interrupt.When guest has done the announcement, it should ack the notification through VIRTIO_NET_CTRL_ANNOUNCE_ACK cmd. This feature is negotiated by a new feature bit VIRTIO_NET_F_ANNOUNCE (which has already been supported by Linux guest). During load, a counter of announcing rounds is set so that after the vm is running it can trigger rounds of config interrupts to notify the guest to build and send the correct garps. Cc: Liuyongan <liuyongan@huawei.com> Cc: Amos Kong <akong@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19migration: introduce self_announce_delay()Jason Wang
This patch introduces self_announce_delay() to calculate the delay for the next announce round. This could be used by other device e.g virtio-net who wants to do announcing by itself. Signed-off-by: Jason Wang <jasowang@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19migration: export SELF_ANNOUNCE_ROUNDSJason Wang
Export it for other users. Signed-off-by: Jason Wang <jasowang@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc: q35: acpi: report error to user on unsupported unplug requestIgor Mammedov
Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19ich: get rid of spaces in type nameMichael S. Tsirkin
Names with spaces in them are nasty, let's not go there. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19virtio: Drop superfluous conditionals around g_strdup()Markus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2014-06-19virtio: Drop superfluous conditionals around g_free()Markus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2014-06-19acpi-test: update expected tablesMichael S. Tsirkin
Update ACPI tables test to match new ACPI tables after adding the memory hotplug feature. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19acpi: update generated filesMichael S. Tsirkin
pdate precompiled ACPI hex files for iasl-less hosts after adding the memory hotplug feature Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc: ACPI BIOS: make GPE.3 handle memory hotplug event on PIIX and Q35 machinesIgor Mammedov
also make handler edge based to avoid losing events, the same as it has been done for PCI and CPU hotplug handlers. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc: ACPI BIOS: reserve SRAT entry for hotplug mem holeIgor Mammedov
Needed for Windows to use hotplugged memory device, otherwise it complains that server is not configured for memory hotplug. Tests shows that aftewards it uses dynamically provided proximity value from _PXM() method if available. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc: add "hotplug-memory-region-size" property to PC_MACHINEIgor Mammedov
... it will be used by acpi-build code and by unit tests Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc: ACPI BIOS: implement memory hotplug interfaceIgor Mammedov
- provides static SSDT object for memory hotplug that can handle upto 256 hotplugable memory slots - SSDT template for memory devices and runtime generator of them in SSDT table. Signed-off-by: Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com> Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc: propagate memory hotplug event to ACPI deviceIgor Mammedov
Notify PIIX4_PM/ICH9LPC device about hotplug event, so that it would send SCI to guest notifying about newly added memory. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc: add acpi-device link to PCMachineStateIgor Mammedov
the link will used later to access device implementing ACPI functions instead of adhoc lookup in QOM tree. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc: migrate piix4 & ich9 MemHotplugStateIgor Mammedov
Adds an optional subsection that allows to migrate current state of acpi_memory_hotplug of ACPI PM device. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19acpi:ich9: add memory hotplug handlingIgor Mammedov
Add memory hotplug initialization/handling to ICH9 LPC device and enable it by default for post 2.0 machine types Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc: ich9 lpc: make it work with global/compat propertiesIgor Mammedov
Propeties of object should be available after its instances_init() callback is finished and not added in PCIDeviceClass.init which is roughly corresponds to realize() method. Moving properties adding into instances_init will fix missing property error when global/compat property mechanism is used. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19acpi:piix4: add memory hotplug handlingIgor Mammedov
Add memory hotplug initialization/handling to PIIX4_PM device and enable it by default for post 2.0 machine types Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> MST: resolve conflict in pc.h
2014-06-19acpi:piix4: allow plug/unlug callbacks handle not only PCI devicesIgor Mammedov
... and report error if plugged in device is not supported. Later these callbacks will be used by memory hotplug. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19trace: pc: add PC_DIMM slot & address allocationIgor Mammedov
Add mhp_pc_dimm_assigned_slot & mhp_pc_dimm_assigned_address events to trace which address and slot where assigned to plugged in PC_DIMM device on target-i386 machine. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19trace: add acpi memory hotplug IO region eventsIgor Mammedov
Add events for tracing accesses to memory hotplug IO ports. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19acpi: memory hotplug ACPI hardware implementationIgor Mammedov
- implements QEMU hardware part of memory hotplug protocol described at "docs/specs/acpi_mem_hotplug.txt" - handles only memory add notification event for now Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19acpi: rename cpu_hotplug_defs.h to pc-hotplug.hIgor Mammedov
to make it more generic, so it could be used for memory hotplug as well. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc-dimm: add busy slot check and slot auto-allocationIgor Mammedov
- if slot property is not specified on -device/device_add command, treat default value as request for assigning PCDIMMDevice to the first free slot. - if slot is provided with -device/device_add command, attempt to use it or fail command if it's already occupied. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc-dimm: add busy address check and address auto-allocationIgor Mammedov
- if 'addr' property is not specified on -device/device_add command, treat the default value as request for assigning PCDIMMDevice to the first free memory region. - if 'addr' is provided with -device/device_add command, attempt to use it or fail command if it's already occupied or falls inside of an existing PCDIMMDevice memory region. Note: GCompareFunc(a, b) used by g_slist_insert_sorted() returns 'gint', however it might be too small to fit difference between 2 addresses. So use 128bit to calculate the difference and normalize result to -1/0/1 return values. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Tested-by: Andrey Korolyov <andrey@xdel.ru> MST: commit log tweaks
2014-06-19pc: add memory hotplug handler to PC_MACHINEIgor Mammedov
that will perform mapping of PC_DIMM device into guest's RAM address space Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc: exit QEMU if compat machine doesn't support memory hotlpugIgor Mammedov
... if user attempts to start it with memory hotplug enabled. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc: add 'etc/reserved-memory-end' fw_cfg interface for SeaBIOSIgor Mammedov
'etc/reserved-memory-end' will allow QEMU to tell BIOS where PCI BARs mapping could safely start in high memory. Allowing BIOS to start mapping 64-bit PCI BARs at address where it wouldn't conflict with other mappings QEMU might place before it. That permits QEMU to reserve extra address space before 64-bit PCI hole for memory hotplug. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc: exit QEMU if number of slots more than supported 256Igor Mammedov
... which is imposed by current naming scheme of ACPI memory devices. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc: initialize memory hotplug address spaceIgor Mammedov
initialize and map hotplug memory address space container into guest's RAM address space. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc-dimm: do not allow setting an in-use memdevIgor Mammedov
using the same memdev backend more than once will cause assertion at MemoryRegion mapping time because it's already mapped. Prevent it by checking that the associated MemoryRegion is not mapped. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> MST: tweak commit log
2014-06-19memory: add memory_region_is_mapped() APIIgor Mammedov
which allows to check if MemoryRegion is already mapped. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19pc: implement pc-dimm device abstractionVasilis Liaskovitis
Each hotplug-able memory slot is a PCDIMMDevice. A hot-add operation for a memory device: - creates a new PCDIMMDevice and makes hotplug controller to map it into guest address space Hotplug operations are done through normal device_add commands. For migration case, all hotplugged memory devices on source should be specified on target's command line using '-device' option with properties set to the same values as on source. To simplify review, patch introduces only PCDIMMDevice QOM skeleton that will be extended by following patches to implement actual memory hotplug and related functions. Signed-off-by: Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com> Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19qdev: expose DeviceState.hotplugged field as a propertyIgor Mammedov
so that management could detect via QOM interface if device was hotplugged Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19qdev: hotplug for bus-less devicesIgor Mammedov
Add get_hotplug_handler() method to machine, and make bus-less device use it during hotplug as a means to discover a hotplug handler controller. The returned controller is used to perform hotplug actions. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-19vl.c: extend -m option to support options for memory hotplugIgor Mammedov
Add following parameters: "slots" - total number of hotplug memory slots "maxmem" - maximum possible memory "slots" and "maxmem" should go in pair and "maxmem" should be greater than "mem" for memory hotplug to be enabled. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> MST: fix build on 32 bit
2014-06-18add memdev backend infrastructureIgor Mammedov
Provides framework for splitting host RAM allocation/ policies into a separate backend that could be used by devices. Initially only legacy RAM backend is provided, which uses memory_region_init_ram() allocator and compatible with every CLI option that affects memory_region_init_ram(). Signed-off-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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