linux/include
Eugenio Pérez f345a0143b vhost-vdpa: uAPI to suspend the device
The ioctl adds support for suspending the device from userspace.

This is a must before getting virtqueue indexes (base) for live migration,
since the device could modify them after userland gets them. There are
individual ways to perform that action for some devices
(VHOST_NET_SET_BACKEND, VHOST_VSOCK_SET_RUNNING, ...) but there was no
way to perform it for any vhost device (and, in particular, vhost-vdpa).

After a successful return of the ioctl call the device must not process
more virtqueue descriptors. The device can answer to read or writes of
config fields as if it were not suspended. In particular, writing to
"queue_enable" with a value of 1 will not make the device start
processing buffers of the virtqueue.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20220810171512.2343333-4-eperezma@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-08-11 04:31:15 -04:00
..
acpi ACPI: CPPC: Don't require _OSC if X86_FEATURE_CPPC is supported 2022-07-05 20:36:11 +02:00
asm-generic asm-generic fixes for 5.19, part 2 2022-07-27 09:50:18 -07:00
clocksource pwm: Changes for v5.19-rc1 2022-06-01 10:49:11 -07:00
crypto
drm drm/scheduler: Don't kill jobs in interrupt context 2022-07-15 10:09:15 -04:00
dt-bindings Char / Misc / Other smaller driver subsystem updates for 5.19-rc1 2022-06-03 11:36:34 -07:00
keys certs: Move load_certificate_list() to be with the asymmetric keys code 2022-06-21 16:05:06 +01:00
kunit
kvm
linux vdpa: Add suspend operation 2022-08-11 04:31:14 -04:00
math-emu
media
memory
misc
net ipv6/addrconf: fix a null-ptr-deref bug for ip6_ptr 2022-07-28 10:42:44 -07:00
pcmcia
ras
rdma RDMA/core: Fix typo in comment 2022-05-24 11:24:58 -03:00
scsi SCSI misc on 20220524 2022-05-25 19:09:48 -07:00
soc ARM: driver changes for 5.19 2022-05-26 10:32:47 -07:00
sound ASoC: Remove unused hw_write_t type 2022-06-24 16:21:41 +01:00
target SCSI misc on 20220524 2022-05-25 19:09:48 -07:00
trace Including fixes from netfilter, bpf and wireless. 2022-07-14 12:48:07 -07:00
uapi vhost-vdpa: uAPI to suspend the device 2022-08-11 04:31:15 -04:00
ufs
vdso
video video: of_display_timing.h: include errno.h 2022-07-06 17:16:20 +02:00
xen arm/xen: Assign xen-grant DMA ops for xen-grant DMA devices 2022-06-06 16:07:30 +02:00