Roman Kagan faeb7833ee kvm: x86: hyperv: guest->host event signaling via eventfd ... In Hyper-V, the fast guest->host notification mechanism is the SIGNAL_EVENT hypercall, with a single parameter of the connection ID to signal. Currently this hypercall incurs a user exit and requires the userspace to decode the parameters and trigger the notification of the potentially different I/O context. To avoid the costly user exit, process this hypercall and signal the corresponding eventfd in KVM, similar to ioeventfd. The association between the connection id and the eventfd is established via the newly introduced KVM_HYPERV_EVENTFD ioctl, and maintained in an (srcu-protected) IDR. Signed-off-by: Roman Kagan <rkagan@virtuozzo.com> Reviewed-by: David Hildenbrand <david@redhat.com> [asm/hyperv.h changes approved by KY Srinivasan. - Radim] Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>		2018-03-06 18:40:36 +01:00
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asm-generic	unify {de,}mangle_poll(), get rid of kernel-side POLL...	2018-02-11 14:37:22 -08:00
drm	virtio-gpu: fix ioctl and expose the fixed status to userspace.	2018-02-27 08:37:58 +01:00
linux	kvm: x86: hyperv: guest->host event signaling via eventfd	2018-03-06 18:40:36 +01:00
misc	ocxl: Add AFU interrupt support	2018-01-24 11:42:58 +11:00
mtd	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
rdma	IB/uverbs: Use __aligned_u64 for uapi headers	2018-02-15 14:59:45 -07:00
scsi	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
sound	Merge remote-tracking branches 'asoc/topic/fsl', 'asoc/topic/fsl-ssi', 'asoc/topic/fsl_asrc' and 'asoc/topic/hdac_hdmi' into asoc-next	2018-01-18 11:55:56 +00:00
video	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
xen	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00