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David Hildenbrand 766aa0a654 memory-device,vhost: Support memory devices that dynamically consume memslots 
We want to support memory devices that have a dynamically managed memory
region container as device memory region. This device memory region maps
multiple RAM memory subregions (e.g., aliases to the same RAM memory
region), whereby these subregions can be (un)mapped on demand.

Each RAM subregion will consume a memslot in KVM and vhost, resulting in
such a new device consuming memslots dynamically, and initially usually
0. We already track the number of used vs. required memslots for all
memslots. From that, we can derive the number of reserved memslots that
must not be used otherwise.

The target use case is virtio-mem and the hyper-v balloon, which will
dynamically map aliases to RAM memory region into their device memory
region container.

Properly document what's supported and what's not and extend the vhost
memslot check accordingly.

Message-ID: <20230926185738.277351-10-david@redhat.com>
Reviewed-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
2023-10-12 14:15:22 +02:00
..
acpi hw/i386: Remove now redundant TYPE_ACPI_GED_X86 2023-10-04 18:15:05 -04:00
adc hw/arm/npcm7xx: Declare QOM macros using OBJECT_DECLARE_SIMPLE_TYPE() 2023-01-12 17:15:09 +00:00
arm hw/arm/versal: Connect the CFRAME_REG and CFRAME_BCAST_REG 2023-09-08 16:41:35 +01:00
audio Pull request q800 20231008 2023-10-09 10:10:48 -04:00
block swim: update IWM/ISM register block decoding 2023-10-06 10:33:43 +02:00
char include/: spelling fixes 2023-09-08 13:08:52 +03:00
core gdbstub: Replace gdb_regs with an array 2023-10-11 08:46:33 +01:00
cpu
cris include: Include headers where needed 2023-01-08 01:54:22 -05:00
cxl hw/cxl: Support 4 HDM decoders at all levels of topology 2023-10-04 18:15:06 -04:00
display include: Include headers where needed 2023-01-08 01:54:22 -05:00
dma include: Include headers where needed 2023-01-08 01:54:22 -05:00
firmware hw/smbios: add core_count2 to smbios table type 4 2022-11-07 14:08:17 -05:00
gpio hw/gpio/nrf51: implement DETECT signal 2023-08-22 17:30:59 +01:00
hyperv include/: spelling fixes 2023-09-08 13:08:52 +03:00
i2c aspeed queue: 2023-09-06 11:14:55 -04:00
i386 hw/i386/pc: improve physical address space bound check for 32-bit x86 systems 2023-10-04 18:15:06 -04:00
ide hw/ide: Extract bmdma_status_writeb() 2023-07-11 00:11:25 +02:00
input hw/input: Clean up includes 2023-02-08 07:16:23 +01:00
intc arm: spelling fixes 2023-07-25 17:13:53 +03:00
ipack
ipmi Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
isa hw/isa/vt82c686: Remove via_isa_set_irq() 2023-07-11 00:11:25 +02:00
loongarch hw/loongarch/virt: Set max 256 cpus support on loongarch virt machine 2023-05-15 19:09:33 +08:00
m68k q800: add alias for MacOS toolbox ROM at 0x40000000 2023-10-06 10:33:43 +02:00
mem memory-device,vhost: Support memory devices that dynamically consume memslots 2023-10-12 14:15:22 +02:00
mips hw/mips/bootloader: Handle buffers as opaque arrays 2023-01-13 09:32:32 +01:00
misc mac_via: work around underflow in TimeDBRA timing loop in SETUPTIMEK 2023-10-06 10:33:43 +02:00
net include/: spelling fixes 2023-09-08 13:08:52 +03:00
nubus Clean up header guards that don't match their file name 2022-05-11 16:49:06 +02:00
nvram bulk: Do not declare function prototypes using 'extern' keyword 2023-08-31 19:47:43 +02:00
openrisc hw/openrisc: Split re-usable boot time apis out to boot.c 2022-09-04 07:02:56 +01:00
pci pci: SLT must be RO 2023-10-04 04:53:52 -04:00
pci-bridge pci/pci_expander_bridge: For CXL HB delay the HB register memory region setup. 2022-06-09 19:32:49 -04:00
pci-host pc: remove short_root_bus property 2023-09-29 09:33:10 +02:00
ppc hw/ppc: Clean up local variable shadowing in _FDT helper routine 2023-09-29 10:07:17 +02:00
rdma qapi: introduce x-query-rdma QMP command 2021-11-02 15:55:14 +00:00
remote include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
riscv riscv: spelling fixes 2023-09-08 13:08:52 +03:00
rtc hw/rtc/aspeed_rtc: Use 64-bit offset for holding time_t difference 2023-08-31 09:45:18 +01:00
rx Clean up header guards that don't match their file name 2022-05-11 16:49:06 +02:00
s390x s390x: spelling fixes 2023-07-25 17:13:45 +03:00
scsi scsi: fetch unit attention when creating the request 2023-07-14 11:10:58 +02:00
sd hw/sd: Introduce a "sd-card" SPI variant model 2023-09-01 11:40:04 +02:00
sensor hw/sensor: Add IC_DEVICE_ID to ISL voltage regulators 2022-07-14 16:24:38 +02:00
sh4
southbridge hw/isa/piix3: Resolve redundant TYPE_PIIX3_XEN_DEVICE 2023-06-07 15:07:10 +01:00
sparc
ssi include/: spelling fixes 2023-09-08 13:08:52 +03:00
timer hw: Replace isa_get_irq() by isa_bus_get_irq() when ISABus is available 2023-02-27 22:29:02 +01:00
tricore Do not include hw/hw.h if it is not necessary 2023-02-27 09:15:38 +01:00
usb include: Include headers where needed 2023-01-08 01:54:22 -05:00
vfio vfio/migration: Refactor PRE_COPY and RUNNING state checks 2023-09-11 08:34:05 +02:00
virtio vhost: Return number of free memslots 2023-10-12 14:15:22 +02:00
watchdog hw/watchdog: Allwinner WDT emulation for system reset 2023-04-20 10:21:13 +01:00
xen xen_arm: Initialize RAM and add hi/low memory regions 2023-08-30 18:23:08 -07:00
xtensa
boards.h memory-device: Track required and actually used memslots in DeviceMemoryState 2023-10-12 14:15:22 +02:00
clock.h include/: spelling fixes 2023-09-08 13:08:52 +03:00
elf_ops.h replace TABs with spaces 2023-03-20 12:43:50 +01:00
fw-path-provider.h Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
hotplug.h pci: fix 'hotplugglable' property behavior 2023-03-07 12:38:59 -05:00
hw.h compiler.h: replace QEMU_NORETURN with G_NORETURN 2022-04-21 17:03:51 +04:00
ide.h hw/ide: Declare ide_get_[geometry/bios_chs_trans] in 'hw/ide/internal.h' 2023-02-27 22:29:02 +01:00
irq.h hw/core/irq: remove unused 'qemu_irq_split' function 2022-04-21 11:37:04 +01:00
loader-fit.h
loader.h hw: arm: Support direct boot for Linux/arm64 EFI zboot images 2023-03-06 14:08:12 +00:00
nmi.h
or-irq.h hw: Replace qemu_or_irq typedef by OrIRQState 2023-02-27 13:27:05 +00:00
pcmcia.h replace TABs with spaces 2023-03-20 12:43:50 +01:00
platform-bus.h
ptimer.h ptimer: Rename PTIMER_POLICY_DEFAULT to PTIMER_POLICY_LEGACY 2022-05-19 16:19:03 +01:00
qdev-clock.h
qdev-core.h bulk: Do not declare function prototypes using 'extern' keyword 2023-08-31 19:47:43 +02:00
qdev-dma.h
qdev-properties-system.h
qdev-properties.h qdev-properties: Add a new macro with bitmask check for uint64_t property 2022-05-14 12:32:41 +02:00
register.h
registerfields.h hw/registerfields: Add shared fields macros 2022-06-22 09:49:34 +02:00
resettable.h
stream.h
sysbus.h
usb.h hw/usb: fix tab indentation 2022-11-08 11:13:48 +01:00
vmstate-if.h