Re: [PATCH v4 0/5] Xen INTX/GSI event channel delivery fixes

[Jürgen Groß <jgross@xxxxxxxx>]

On 13.01.21 14:26, David Woodhouse wrote:
> Fix various breakages with INTX/GSI event channel interrupt delivery,
> and add a command line option to test it so that it hopefully doesn't
> get so broken again.
>
> Karim attempted to rip this out in 2017 but put it back because it's still
> necessary with older versions of Xen. This fixes it properly, and makes it
> easier to test. cf. https://lkml.org/lkml/2017/4/10/266
>
> v2:
>   • Add no_vector_callback to Documentation/admin-guide/kernel-parameters.txt
>   • Further fixes to conditional smp_ops initialisation in xen_hvm_smp_init()
>
> v3:
>   • Rename test option to xen_no_vector_callback
>
> v4:
>   • Fix unconditional references to xen_have_vector_callback in Arm build
>
> David Woodhouse (5):
>        xen: Fix event channel callback via INTX/GSI
>        xen: Set platform PCI device INTX affinity to CPU0
>        x86/xen: Add xen_no_vector_callback option to test PCI INTX delivery
>        x86/xen: Don't register Xen IPIs when they aren't going to be used
>        x86/xen: Fix xen_hvm_smp_init() when vector callback not available
>
>   Documentation/admin-guide/kernel-parameters.txt |  4 ++
>   arch/arm/xen/enlighten.c                        |  2 +-
>   arch/x86/xen/enlighten_hvm.c                    | 15 ++++-
>   arch/x86/xen/smp_hvm.c                          | 27 ++++++---
>   drivers/xen/events/events_base.c                | 10 ---
>   drivers/xen/platform-pci.c                      |  8 ++-
>   drivers/xen/xenbus/xenbus.h                     |  1 +
>   drivers/xen/xenbus/xenbus_comms.c               |  8 ---
>   drivers/xen/xenbus/xenbus_probe.c               | 81 ++++++++++++++++++++-----
>   include/xen/xenbus.h                            |  2 +-
>   10 files changed, 110 insertions(+), 48 deletions(-)
Series pushed to xen/tip.git for-linus-5.11


Juergen

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