On 30.10.20 14:29, Ross Lagerwall wrote:
Hi,
Please backport [1] to 4.4, 4.9, 4.14, 4.19.
It fixes a commit that has been backported to all the current stable releases but for some reason the fixup was only backported to 5.4 & 5.8.
Greg has told me he queued my backport already.
Juergen
Debian 9 no longer boots as a Xen HVM guest because it is missing the fixup patch.
Thanks,
Ross
[1]:
commit 0891fb39ba67bd7ae023ea0d367297ffff010781
Author: Juergen Gross <jgross@xxxxxxxx>
Date: Wed Sep 30 11:16:14 2020 +0200
xen/events: don't use chip_data for legacy IRQs
Since commit c330fb1ddc0a ("XEN uses irqdesc::irq_data_common::handler_data to store a per interrupt XEN data pointer which contains XEN specific information.")
Xen is using the chip_data pointer for storing IRQ specific data. When
running as a HVM domain this can result in problems for legacy IRQs, as
those might use chip_data for their own purposes.
Use a local array for this purpose in case of legacy IRQs, avoiding the
double use.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: c330fb1ddc0a ("XEN uses irqdesc::irq_data_common::handler_data to store a per interrupt XEN data pointer which contains XEN specific information.")
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Tested-by: Stefan Bader <stefan.bader@xxxxxxxxxxxxx>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20200930091614.13660-1-jgross@xxxxxxxx
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
