Eric Lee / smarc-fsl-linux-kernel

19 Jun, 2019

1 commit

  • d2912cb15   treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 ... Browse Code »

    Based on 2 normalized pattern(s):

    this program is free software you can redistribute it and or modify
    it under the terms of the gnu general public license version 2 as
    published by the free software foundation

    this program is free software you can redistribute it and or modify
    it under the terms of the gnu general public license version 2 as
    published by the free software foundation #

    extracted by the scancode license scanner the SPDX license identifier

    GPL-2.0-only

    has been chosen to replace the boilerplate/reference in 4122 file(s).

    Signed-off-by: Thomas Gleixner
    Reviewed-by: Enrico Weigelt
    Reviewed-by: Kate Stewart
    Reviewed-by: Allison Randal
    Cc: linux-spdx@vger.kernel.org
    Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
    Signed-off-by: Greg Kroah-Hartman

    Thomas Gleixner
     

12 May, 2016

1 commit

01 Oct, 2015

1 commit

  • f73f81731   virt: IRQ bypass manager ... Browse Code »

    When a physical I/O device is assigned to a virtual machine through
    facilities like VFIO and KVM, the interrupt for the device generally
    bounces through the host system before being injected into the VM.
    However, hardware technologies exist that often allow the host to be
    bypassed for some of these scenarios. Intel Posted Interrupts allow
    the specified physical edge interrupts to be directly injected into a
    guest when delivered to a physical processor while the vCPU is
    running. ARM IRQ Forwarding allows forwarded physical interrupts to
    be directly deactivated by the guest.

    The IRQ bypass manager here is meant to provide the shim to connect
    interrupt producers, generally the host physical device driver, with
    interrupt consumers, generally the hypervisor, in order to configure
    these bypass mechanism. To do this, we base the connection on a
    shared, opaque token. For KVM-VFIO this is expected to be an
    eventfd_ctx since this is the connection we already use to connect an
    eventfd to an irqfd on the in-kernel path. When a producer and
    consumer with matching tokens is found, callbacks via both registered
    participants 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

    Alex Williamson