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qemu/include/hw
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Alex Williamson 238e917285 vfio/ccw/pci: Allow devices to opt-in for ballooning 
If a vfio assigned device makes use of a physical IOMMU, then memory
ballooning is necessarily inhibited due to the page pinning, lack of
page level granularity at the IOMMU, and sufficient notifiers to both
remove the page on balloon inflation and add it back on deflation.
However, not all devices are backed by a physical IOMMU.  In the case
of mediated devices, if a vendor driver is well synchronized with the
guest driver, such that only pages actively used by the guest driver
are pinned by the host mdev vendor driver, then there should be no
overlap between pages available for the balloon driver and pages
actively in use by the device.  Under these conditions, ballooning
should be safe.

vfio-ccw devices are always mediated devices and always operate under
the constraints above.  Therefore we can consider all vfio-ccw devices
as balloon compatible.

The situation is far from straightforward with vfio-pci.  These
devices can be physical devices with physical IOMMU backing or
mediated devices where it is unknown whether a physical IOMMU is in
use or whether the vendor driver is well synchronized to the working
set of the guest driver.  The safest approach is therefore to assume
all vfio-pci devices are incompatible with ballooning, but allow user
opt-in should they have further insight into mediated devices.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2018-08-17 09:27:16 -06:00
..
acpi hw/tpm: Use the IEC binary prefix definitions 2018-07-02 15:41:13 +02:00
adc STM32F2xx: Add the ADC device 2016-10-04 13:28:07 +01:00
arm hw/arm: make bitbanded IO optional on ARMv7-M 2018-08-16 14:05:28 +01:00
audio hw/audio/wm8750: move WM8750 declarations from i2c/i2c.h to audio/wm8750.h 2018-02-02 08:19:25 +01:00
block block: Remove deprecated -drive option serial 2018-08-15 12:50:39 +02:00
char serial-isa: Use MAX_ISA_SERIAL_PORTS instead of MAX_SERIAL_PORTS 2018-04-26 13:57:00 +01:00
core hw/core/split-irq: Device that splits IRQ lines 2018-03-02 11:03:45 +00:00
cpu hw: remove "qemu/osdep.h" from header files 2017-12-18 17:07:02 +03:00
cris char: rename CharDriverState Chardev 2017-01-27 18:07:59 +01:00
display hw/display: Use the IEC binary prefix definitions 2018-07-02 15:41:13 +02:00
dma hw: Do not include "exec/address-spaces.h" if it is not necessary 2018-06-01 14:15:10 +02:00
gpio bcm2835_gpio: add bcm2835 gpio controller 2017-02-28 17:10:00 +00:00
i2c ppc4xx_i2c: Rewrite to model hardware more closely 2018-07-03 09:56:52 +10:00
i386 i386: do not migrate MSR_SMI_COUNT on machine types <2.12 2018-07-30 14:00:11 +02:00
ide ide: introduce ide_transfer_start_norecurse 2018-06-08 13:36:31 -04:00
input adb: add property to disable direct reg 3 writes 2018-06-16 16:32:33 +10:00
intc intc/arm_gic: Add the virtualization extensions to the GIC state 2018-08-14 17:17:20 +01:00
ipack ipack: Update e-mail address 2016-05-18 15:04:27 +03:00
ipmi ipmi: introduce an ipmi_bmc_gen_event() API 2017-04-26 12:41:55 +10:00
isa superio: Don't use MAX_SERIAL_PORTS for serial port limit 2018-04-26 13:57:00 +01:00
kvm hw: move headers to include/ 2013-04-08 18:13:10 +02:00
lm32 intc: make HMP 'info irq' and 'info pic' commands use InterruptStatsProvider interface 2016-10-04 10:00:25 +02:00
m68k hw/char/mcf_uart: QOMify the ColdFire UART 2017-02-16 14:06:56 +01:00
mem pc-dimm: get_memory_region() will not fail after realize 2018-06-28 19:05:34 +02:00
mips hw/mips: Use the IEC binary prefix definitions 2018-07-02 15:41:16 +02:00
misc aspeed: add a max_ram_size property to the memory controller 2018-08-16 14:29:58 +01:00
net hw/net: Use the IEC binary prefix definitions 2018-07-02 15:41:16 +02:00
nvram Clean up includes 2018-02-09 05:05:11 +01:00
pci allocate pci id for mdpy 2018-05-23 03:14:40 +03:00
pci-bridge Clean up includes 2018-02-09 05:05:11 +01:00
pci-host uninorth: remove token register from uninorth device 2018-06-12 09:33:52 +10:00
ppc ppc patch queue 2018-07-03 2018-07-03 14:59:27 +01:00
riscv hw/riscv/sifive_u: Connect the Cadence GEM Ethernet device 2018-07-05 15:24:25 -07:00
s390x s390x/tcg: properly implement the TOD 2018-07-02 10:37:38 +02:00
scsi Block layer patches: 2018-06-29 18:29:15 +01:00
sd sdcard: Reflect when the Spec v3 is supported in the Config Register (SCR) 2018-06-08 13:15:34 +01:00
sh4 hw: Do not include "exec/address-spaces.h" if it is not necessary 2018-06-01 14:15:10 +02:00
smbios Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
sparc sun4u_iommu: update to reflect IOMMU is no longer part of the APB device 2018-01-09 21:48:20 +00:00
ssi xilinx_spips: Make dma transactions as per dma_burst_size 2018-06-26 17:50:39 +01:00
timer aspeed/timer: use the APB frequency from the SCU 2018-06-26 17:50:42 +01:00
tricore Clean up header guards that don't match their file name 2016-07-12 16:19:16 +02:00
unicore32 hw/unicore32: restrict hw addr defines to source file 2017-12-18 17:07:02 +03:00
usb usb: Add basic code to emulate Chipidea USB IP 2018-02-09 10:40:30 +00:00
vfio vfio/ccw/pci: Allow devices to opt-in for ballooning 2018-08-17 09:27:16 -06:00
virtio virtio-gpu: fix crashes upon warm reboot with vga mode 2018-08-07 15:03:58 +01:00
watchdog watchdog: wdt_aspeed: Add support for the reset width register 2017-09-04 15:21:54 +01:00
xen compiler: add a sizeof_field() macro 2018-06-27 13:01:40 +01:00
xtensa Clean up includes 2018-02-09 05:05:11 +01:00
boards.h boards.h: Remove doc comment reference to nonexistent function 2018-07-09 14:51:34 +01:00
bt.h char: rename CharDriverState Chardev 2017-01-27 18:07:59 +01:00
compat.h vga: disable global_vmstate for 3.0+ machine types 2018-07-03 11:19:49 +02:00
devices.h hw: Clean "hw/devices.h" includes 2018-06-01 14:15:10 +02:00
elf_ops.h Add symbol table callback interface to load_elf 2018-03-07 08:30:28 +13:00
empty_slot.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
fw-path-provider.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
hotplug.h qdev: add HotplugHandler->post_plug() callback 2018-07-16 16:58:16 +02:00
hw.h migration: Split qemu-file.h 2017-06-01 18:49:22 +02:00
ide.h xen-platform: add missing disk unplug option 2017-01-27 15:23:29 -08:00
irq.h hw/core/split-irq: Device that splits IRQ lines 2018-03-02 11:03:45 +00:00
loader-fit.h Use #include "..." for our own headers, <...> for others 2018-02-09 05:05:11 +01:00
loader.h loader: Implement .hex file loader 2018-08-16 14:05:28 +01:00
nmi.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
or-irq.h hw/core/or-irq: Support more than 16 inputs to an OR gate 2018-06-15 15:23:34 +01:00
pcmcia.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
platform-bus.h platform-bus-device: use device plug callback instead of machine_done notifier 2018-05-10 18:10:56 +01:00
ptimer.h ptimer: Add TRIGGER_ONLY_ON_DECREMENT policy option 2018-07-09 14:51:34 +01:00
qdev-core.h qdev: Remove DeviceClass::init() and ::exit() 2018-06-01 15:14:31 +02:00
qdev-dma.h qdev: Remove hex8/32/64 property types 2014-02-14 21:12:04 +01:00
qdev-properties.h net: Remove the deprecated "vlan" parameter 2018-05-14 15:47:14 +08:00
qdev.h hw: move headers to include/ 2013-04-08 18:13:10 +02:00
register.h hw: register: Run post_write hook on reset 2018-03-01 11:05:43 +00:00
registerfields.h Use #include "..." for our own headers, <...> for others 2018-02-09 05:05:11 +01:00
stream.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
sysbus.h hw/core/sysbus: Add a function for creating and attaching an object 2018-07-17 13:12:49 +01:00
usb.h usb: Remove legacy -usbdevice options (host, serial, disk and net) 2018-01-26 07:15:08 +01:00