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Diffstat (limited to 'results/classifier/accel-gemma3:12b/kvm/1536487')
| -rw-r--r-- | results/classifier/accel-gemma3:12b/kvm/1536487 | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/results/classifier/accel-gemma3:12b/kvm/1536487 b/results/classifier/accel-gemma3:12b/kvm/1536487 new file mode 100644 index 000000000..b225eee13 --- /dev/null +++ b/results/classifier/accel-gemma3:12b/kvm/1536487 @@ -0,0 +1,24 @@ + +Unable to migrate pc-i440fx-2.4 KVM guest from QEMU 2.5.0 to QEMU 2.4.1 + +When migrating a pc-i440fc-2.4 KVM guest from QEMU 2.5.0 to QEMU 2.4.1, the target QEMU errors out: + + qemu-system-x86_64: error while loading state for instance 0x0 of device 'fw_cfg' + +This appears to be related to the addition of a DMA interface to fw_cfg last October: + + http://lists.nongnu.org/archive/html/qemu-devel/2015-10/msg04568.html + +"info qtree" on the source QEMU shows that the DMA interface for fw_cfg had been enabled: + + bus: main-system-bus + type System + ... + dev: fw_cfg_io, id "" + iobase = 1296 (0x510) + dma_iobase = 1300 (0x514) + dma_enabled = true + +Incidentally, this guest had just undergone a migration from QEMU 2.4.0 to QEMU 2.5.0, so it looks like DMA was enabled simply through the migration. + +It seems to me that the DMA interface for fw_cfg should only be enabled on pc-i440fx-2.5 machines or higher. \ No newline at end of file |