Bisected Linux regression: ACPI powerbutton events don't work under Xen since commit b81975eade8c6495f3c4d6746d22bdc95f617777

[Sander Eikelenboom]

Hi,

When running under Xen, ACPI powerbutton events don't work anymore, 
there is no reaction when pressing the powerbutton.

On baremetal everything works fine, acpid gets the event and the 
machine powers down perfectly. The machine is an Intel NUC.
 
Bisection has lead to:

b81975eade8c6495f3c4d6746d22bdc95f617777 is the first bad commit
commit b81975eade8c6495f3c4d6746d22bdc95f617777
Author: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
Date:   Mon Jun 9 16:20:11 2014 +0800

    x86, irq: Clean up irqdomain transition code

    Now we have completely switched to irqdomain, so clean up transition code
    in IOAPIC drivers.

    Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
    Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
    Cc: Tony Luck <tony.luck@xxxxxxxxx>
    Cc: Joerg Roedel <joro@xxxxxxxxxx>
    Cc: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
    Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
    Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
    Cc: Grant Likely <grant.likely@xxxxxxxxxx>
    Cc: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx>
    Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
    Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
    Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
    Link: http://lkml.kernel.org/r/1402302011-23642-43-git-send-email-jiang.liu@xxxxxxxxxxxxxxx
    Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

Reverting this specific commit on linux-tip (3.19-mw) gets things working again under Xen.
Kernel .config is attached.

--
Sander

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