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[Qemu-devel] [PATCH RFC 0/1] s390x: pci compat handling
From: |
Cornelia Huck |
Subject: |
[Qemu-devel] [PATCH RFC 0/1] s390x: pci compat handling |
Date: |
Fri, 15 Sep 2017 12:14:05 +0200 |
While playing around with compat machines a bit, I noticed that my
zpci detanglement patches broke migration from 2.7 to current master
(2.8 or newer are fine, which is why I did not notice that before.)
qemu 2.7 seems to create a savevm that a s390-next (or master) build
without the s390 phb chokes on:
qemu-system-s390x: Unknown savevm section or instance 'PCIBUS' 0
Creating the s390 phb for compat machines seems to cure this; still
RFC for the following reasons:
- I'm not sure what we're supposed to do on builds without pci. Fail
creating the compat machines? Do we need a new set of _NOPCI compat
machines for that?
- I don't understand why 2.7 fails, but 2.8 and later are fine. At
least, I was not able to spot which commit changed the behaviour
here... and I really want to understand this. Pointers welcome.
- I have not tested it extensively yet.
Patch is against s390-next.
Cornelia Huck (1):
s390x/ccw: create s390 phb for compat reasons as well
hw/s390x/s390-virtio-ccw.c | 6 +++++-
include/hw/s390x/s390-virtio-ccw.h | 1 +
2 files changed, 6 insertions(+), 1 deletion(-)
--
2.13.5
- [Qemu-devel] [PATCH RFC 0/1] s390x: pci compat handling,
Cornelia Huck <=
- [Qemu-devel] [PATCH RFC 1/1] s390x/ccw: create s390 phb for compat reasons as well, Cornelia Huck, 2017/09/15
- Re: [Qemu-devel] [PATCH RFC 1/1] s390x/ccw: create s390 phb for compat reasons as well, David Hildenbrand, 2017/09/15
- Re: [Qemu-devel] [PATCH RFC 1/1] s390x/ccw: create s390 phb for compat reasons as well, Cornelia Huck, 2017/09/15
- Re: [Qemu-devel] [PATCH RFC 1/1] s390x/ccw: create s390 phb for compat reasons as well, David Hildenbrand, 2017/09/15
- Re: [Qemu-devel] [PATCH RFC 1/1] s390x/ccw: create s390 phb for compat reasons as well, Cornelia Huck, 2017/09/15
- Re: [Qemu-devel] [PATCH RFC 1/1] s390x/ccw: create s390 phb for compat reasons as well, David Hildenbrand, 2017/09/15
- Re: [Qemu-devel] [PATCH RFC 1/1] s390x/ccw: create s390 phb for compat reasons as well, Halil Pasic, 2017/09/15