ec8f24b7 - treewide: Add SPDX license identifier - Makefile/Kconfig

Sun, 19 May 2019 12:07:45 +0000

treewide: Add SPDX license identifier - Makefile/KconfigAdd SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any formThese files fall under the project license, GPL v2 only. The resulting SPDXlicense identifier is: GPL-2.0-onlySigned-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/virt/lib/Makefile

f73f8173 - virt: IRQ bypass manager

Fri, 18 Sep 2015 14:29:39 +0000

virt: IRQ bypass managerWhen a physical I/O device is assigned to a virtual machine throughfacilities like VFIO and KVM, the interrupt for the device generallybounces through the host system before being injected into the VM.However, hardware technologies exist that often allow the host to bebypassed for some of these scenarios. Intel Posted Interrupts allowthe specified physical edge interrupts to be directly injected into aguest when delivered to a physical processor while the vCPU isrunning. ARM IRQ Forwarding allows forwarded physical interrupts tobe directly deactivated by the guest.The IRQ bypass manager here is meant to provide the shim to connectinterrupt producers, generally the host physical device driver, withinterrupt consumers, generally the hypervisor, in order to configurethese bypass mechanism. To do this, we base the connection on ashared, opaque token. For KVM-VFIO this is expected to be aneventfd_ctx since this is the connection we already use to connect aneventfd to an irqfd on the in-kernel path. When a producer andconsumer with matching tokens is found, callbacks via both registeredparticipants allow the bypass facilities to be automatically enabled.Signed-off-by: Alex Williamson Reviewed-by: Eric Auger Tested-by: Eric Auger Tested-by: Feng Wu Signed-off-by: Feng Wu Signed-off-by: Paolo Bonzini List of files: /linux-6.15/virt/lib/Makefile

Changes in Makefile

ec8f24b7 - treewide: Add SPDX license identifier - Makefile/Kconfig

f73f8173 - virt: IRQ bypass manager