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qemu-e2k/include/hw
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Igor Mammedov 98e753a6e5 pc/fwcfg: unbreak migration from qemu-2.5 and qemu-2.6 during firmware boot 
Since 2.7 commit (b2a575a Add optionrom compatible with fw_cfg DMA version)
regressed migration during firmware exection time by
abusing fwcfg.dma_enabled property to decide loading
dma version of option rom AND by mistake disabling DMA
for 2.6 and earlier globally instead of only for option rom.

so 2.6 machine type guest is broken when it already runs
firmware in DMA mode but migrated to qemu-2.7(pc-2.6)
at that time;

a) qemu-2.6:pc2.6 (fwcfg.dma=on,firmware=dma,oprom=ioport)
b) qemu-2.7:pc2.6 (fwcfg.dma=off,firmware=ioport,oprom=ioport)

  to:   a     b
from
a       OK   FAIL
b       OK   OK

So we currently have broken forward migration from
qemu-2.6 to qemu-2.[789] that however could be fixed
for 2.10 by re-enabling DMA for 2.[56] machine types
and allowing dma capable option rom only since 2.7.
As result qemu should end up with:

c) qemu-2.10:pc2.6 (fwcfg.dma=on,firmware=dma,oprom=ioport)

   to:  a     b    c
from
a      OK   FAIL  OK
b      OK   OK    OK
c      OK   FAIL  OK

where forward migration from qemu-2.6 to qemu-2.10 should
work again leaving only qemu-2.[789]:pc-2.6 broken.

Reported-by: Eduardo Habkost <ehabkost@redhat.com>
Analyzed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 		2017-05-10 22:04:23 +03:00
..
acpi hw/arm/virt: generate 64-bit addressable ACPI objects 2017-05-10 22:04:23 +03:00
adc STM32F2xx: Add the ADC device 2016-10-04 13:28:07 +01:00
arm aspeed: add a FTGMAC100 nic 2017-04-25 19:17:25 +08:00
audio Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
block hw/block: Introduce share-rw qdev property 2017-02-28 20:40:36 +01:00
char char: rename CharDriverState Chardev 2017-01-27 18:07:59 +01:00
core generic-loader: Add a generic loader 2016-10-04 13:28:09 +01:00
cpu qapi: keep names in 'CpuInstanceProperties' in sync with struct CPUCore 2016-06-27 13:15:06 +10:00
cris char: rename CharDriverState Chardev 2017-01-27 18:07:59 +01:00
display Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
dma include: Fix typos found by codespell 2017-01-24 23:26:52 +03:00
gpio bcm2835_gpio: add bcm2835 gpio controller 2017-02-28 17:10:00 +00:00
i2c i2c: Allow I2C devices to NAK start events 2017-01-09 11:40:20 +00:00
i386 pc/fwcfg: unbreak migration from qemu-2.5 and qemu-2.6 during firmware boot 2017-05-10 22:04:23 +03:00
ide ide: core: add cleanup function 2017-03-15 20:50:14 -04:00
input ps2: fix mouse mappings for right/middle button 2017-02-20 11:25:38 +01:00
intc hw/intc/arm_gicv3_kvm: Add ICC_SRE_EL1 register to vmstate 2017-02-28 17:10:00 +00:00
ipack ipack: Update e-mail address 2016-05-18 15:04:27 +03:00
ipmi ipmi: introduce an ipmi_bmc_gen_event() API 2017-04-26 12:41:55 +10:00
isa portio: keep references on portio 2016-09-08 18:05:21 +04:00
kvm hw: move headers to include/ 2013-04-08 18:13:10 +02:00
lm32 intc: make HMP 'info irq' and 'info pic' commands use InterruptStatsProvider interface 2016-10-04 10:00:25 +02:00
m68k hw/char/mcf_uart: QOMify the ColdFire UART 2017-02-16 14:06:56 +01:00
mem nvdimm acpi: rename nvdimm_acpi_hotplug 2016-11-15 17:20:37 +02:00
mips Move target-* CPU file into a target/ folder 2016-12-20 21:52:12 +01:00
misc target-arm: Implement BCM2835 hardware RNG 2017-02-28 12:08:13 +00:00
net net/ftgmac100: add a 'aspeed' property 2017-04-25 19:17:25 +08:00
nvram fw-cfg: turn FW_CFG_FILE_SLOTS into a device property 2017-01-18 22:59:53 +02:00
pci pci: Reduce scope of error injection 2017-05-08 20:32:14 +02:00
pci-host pseries: Don't expose PCIe extended config space on older machine types 2017-03-14 11:54:17 +11:00
ppc ppc/pnv: generate an OEM SEL event on shutdown 2017-04-26 12:41:56 +10:00
s390x Basic support for using channel-attached 3270 'green-screen' 2017-05-05 16:56:38 +01:00
scsi hw: Deprecate -drive if=scsi with non-onboard HBAs 2017-02-21 13:17:45 +01:00
sd hw/sd: add card-reparenting function 2017-02-28 17:10:00 +00:00
sh4 char: rename CharDriverState Chardev 2017-01-27 18:07:59 +01:00
smbios smbios: filter based on CONFIG_SMBIOS rather than TARGET 2017-01-16 17:52:34 +01:00
sparc char: rename CharDriverState Chardev 2017-01-27 18:07:59 +01:00
ssi aspeed/smc: handle SPI flash Command mode 2017-01-20 11:15:08 +00:00
timer armv7m: Split systick out from NVIC 2017-02-28 16:18:49 +00:00
tricore Clean up header guards that don't match their file name 2016-07-12 16:19:16 +02:00
unicore32 Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
usb Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
vfio vfio: Pass an error object to vfio_get_device 2016-10-17 10:58:00 -06:00
virtio vhost-scsi: create a vhost-scsi-common abstraction 2017-05-05 12:10:00 +02:00
watchdog wdt: Add Aspeed watchdog device model 2017-02-07 18:29:59 +00:00
xen xen/9pfs: build and register Xen 9pfs backend 2017-04-25 11:04:33 -07:00
boards.h numa,spapr: align default numa node memory size to 256MB 2017-03-22 11:32:42 +11:00
bt.h char: rename CharDriverState Chardev 2017-01-27 18:07:59 +01:00
compat.h s390x: introduce 2.10 compat machine 2017-04-21 09:32:09 +02:00
devices.h sm501: QOMify 2017-04-24 12:32:12 +01:00
elf_ops.h elf-loader: Allow late loading of elf 2017-02-28 12:04:48 +01:00
empty_slot.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
fw-path-provider.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
hotplug.h qdev: hotplug: drop HotplugHandler.post_plug callback 2016-11-15 17:20:37 +02:00
hw.h hw: move reset handlers from vl.c to hw/core 2017-01-16 17:52:35 +01:00
ide.h xen-platform: add missing disk unplug option 2017-01-27 15:23:29 -08:00
irq.h irq: Remove qemu_irq_intercept_out 2014-10-23 16:41:25 +02:00
loader-fit.h loader: Support Flattened Image Trees (FIT images) 2017-02-21 23:47:40 +00:00
loader.h elf-loader: Allow late loading of elf 2017-02-28 12:04:48 +01:00
nmi.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
or-irq.h irq: Add a new irq device that allows the ORing of lines 2016-10-04 13:28:07 +01:00
pcmcia.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
platform-bus.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
ptimer.h tests: fix ptimer leaks 2017-03-01 00:09:28 +04:00
qdev-core.h migration/next for 20170421 2017-04-21 15:59:27 +01:00
qdev-dma.h qdev: Remove hex8/32/64 property types 2014-02-14 21:12:04 +01:00
qdev-properties.h qdev: Constify value passed to qdev_prop_set_macaddr 2017-04-20 15:22:41 -03:00
qdev.h hw: move headers to include/ 2013-04-08 18:13:10 +02:00
register.h hw/registerfields.h: Pull FIELD etc macros out of hw/register.h 2017-01-27 15:20:21 +00:00
registerfields.h hw/registerfields.h: Pull FIELD etc macros out of hw/register.h 2017-01-27 15:20:21 +00:00
stream.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
sysbus.h sysbus: Remove ignored return value of FindSysbusDeviceFunc 2016-09-27 17:03:34 -03:00
usb.h usb: replace handle_destroy with unrealize 2017-02-23 15:40:19 +01:00