Hello Doug, On Tuesday 23 October 2012 22:38:47 Doug Goldstein wrote: > >>> qemu: warning: error while loading state for instance 0x0 of device > >>> 'ram' load of migration failed ... > >> I diagnosed that using gdb to single step kvm until I found > >> hw/pci.c#get_pci_config_device() returning -EINVAL. ... > But yes I can confirm that > vmstate_load_state() which is calling field->info->get() which is > calling get_pci_config_device() is returning -EINVAL. ... > Any recommendations to fix this? Or do I need to kill the saved state > and start over?
For start try to re-get the old PXE ROM files, that is for Debian re-install the old etherboot-qemu or an older Version of the ipxe-qemu package. If that then works again, you can go further. Otherwise you need to get the exact index "i" where get_pci_config_device() returns -EINVAL and match that with the PCI spec. For short see hw/pci_regs.h. For our Debian based UCS distribution I patched qemu(-kvm) to use the old image files (which are still available and installed in parallel to the new files) if the pc-level is 0.14 or lower (which is the version we currently ship; only our next release will switch to 1.1.2). I've attached my patch FYI. That is only a work around until QEMU provides a real solution. If you've used an e1000, that is not enougth because some more PCI configuration bits (PCI_STATUS_CAP_LIST) were changed in an incompatible way. If I remember correctly there was a different bug report, where changed PCI bits were also responsible for breaking saved states: Some PCI devices were changed to multi-function devices (or the other way around), which also breaks loading of previous saved stated. I think it was a bug in libvirt which started adding an explicit "multifunction=on", while the save was done using an implicit "multifinction=off". (<https://forge.univention.org/bugzilla/show_bug.cgi?id=22877#c6> in our German BZ) Sincerely Philipp Hahn -- Philipp Hahn Open Source Software Engineer h...@univention.de Univention GmbH be open. fon: +49 421 22 232- 0 Mary-Somerville-Str.1 D-28359 Bremen fax: +49 421 22 232-99 http://www.univention.de/
diff -urN qemu-kvm-1.1.2+dfsg.orig/debian/patches/romfile-compatibility.diff qemu-kvm-1.1.2+dfsg/debian/patches/romfile-compatibility.diff
--- qemu-kvm-1.1.2+dfsg.orig/debian/patches/romfile-compatibility.diff 1970-01-01 01:00:00.000000000 +0100
+++ qemu-kvm-1.1.2+dfsg/debian/patches/romfile-compatibility.diff 2012-10-08 14:25:09.225656404 +0200
@@ -0,0 +1,39 @@
+Bug #24702: Fix PXE ROM size mismatch
+
+For pc-0.14 and older use the PXE ROMs from the deprecated etherboot-qemu
+package, which have different sizes. Without the patch the virtual PC gets
+build with the current ROM sizes. Loading then fails because the stored PCI ROM
+BAR size mismatches the configured size.
+--- a/hw/pc_piix.c
++++ b/hw/pc_piix.c
+@@ -433,6 +433,30 @@ static QEMUMachine pc_machine_v0_15 = {
+ .driver = "virtio-balloon-pci",\
+ .property = "event_idx",\
+ .value = "off",\
++ },{\
++ .driver = "ne2000",\
++ .property = "romfile",\
++ .value = "/usr/lib/etherboot/rtl8029.rom",\
++ },{\
++ .driver = "rtl8139",\
++ .property = "romfile",\
++ .value = "/usr/lib/etherboot/rtl8139.rom",\
++ },{\
++ .driver = "e1000",\
++ .property = "romfile",\
++ .value = "/usr/lib/etherboot/e1000-82540em.rom",\
++ },{\
++ .driver = "pcnet",\
++ .property = "romfile",\
++ .value = "/usr/lib/etherboot/pcnet32.rom",\
++ },{\
++ .driver = "ne2k-isa",\
++ .property = "romfile",\
++ .value = "/usr/lib/etherboot/ne.rom",\
++ },{\
++ .driver = "virtio-net-pci",\
++ .property = "romfile",\
++ .value = "/usr/lib/etherboot/virtio-net.rom",\
+ }
+
+ static QEMUMachine pc_machine_v0_14 = {
diff -urN qemu-kvm-1.1.2+dfsg.orig/debian/patches/series qemu-kvm-1.1.2+dfsg/debian/patches/series
--- qemu-kvm-1.1.2+dfsg.orig/debian/patches/series 2012-09-10 12:14:05.000000000 +0200
+++ qemu-kvm-1.1.2+dfsg/debian/patches/series 2012-10-08 14:24:51.497155189 +0200
@@ -8,3 +8,4 @@
net-add--netdev-options-to-man-page.patch
revert-serial-fix-retry-logic.patch
+romfile-compatibility.diff
diff -urN qemu-kvm-1.1.2+dfsg.orig/debian/control qemu-kvm-1.1.2+dfsg/debian/control
--- qemu-kvm-1.1.2+dfsg.orig/debian/control 2012-09-11 08:29:43.000000000 +0200
+++ qemu-kvm-1.1.2+dfsg/debian/control 2012-10-08 15:06:39.201155102 +0200
@@ -37,7 +37,8 @@
seabios (>> 1.7.0~), vgabios (>= 0.6c-3~),
qemu-keymaps, qemu-utils (>> 0.14.0),
ipxe-qemu | ipxe (<< 1.0.0+git-20120202.f6840ba-2)
-Recommends: bridge-utils, iproute
+Recommends: bridge-utils, iproute,
+ etherboot-qemu
Suggests: debootstrap, vde2, samba
Provides: kvm
Conflicts: kvm-source (<= 18-1), kvm-data (<= 66+dfsg-1.1), kvm (<< 1:0)
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