Re: [Qemu-devel] [PULL 25/26] block: Remove deprecated -drive option serial

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On 25.06.2018 09:16, Peter Krempa wrote:
> On Fri, Jun 22, 2018 at 14:55:02 +0200, Kevin Wolf wrote:
>> Am 22.06.2018 um 13:38 hat Christian Borntraeger geschrieben:
>>>
>>> On 06/15/2018 04:21 PM, Kevin Wolf wrote:
>>>> The -drive option serial was deprecated in QEMU 2.10. It's time to
>>>> remove it.
>>>>
>>>> Tests need to be updated to set the serial number with -global instead
>>>> of using the -drive option.
[...]
>>> So it seems that this breaks s390x.
>>
>> Thanks for bringing this up. libvirt should fix this before QEMU 3.0 is
>> released.
> 
> So, I already extracted the code that formats the attributes which
> should be actually done for the frontend few months ago, but did not
> swithc to it since I did not want to check when everything was added.
> 
> The fix will be rather simple if we are certain that the disk serial,
> geometry and error policies were supported in qemu 1.5. In that case we
> can switch unconditionally to the new format.

The CHS device properties are available since QEMU v1.2:
- IDE: https://git.qemu.org/?p=qemu.git;a=commitdiff;h=ba801960
- SCSI: https://git.qemu.org/?p=qemu.git;a=commitdiff;h=d252df48
- virtio-blk: https://git.qemu.org/?p=qemu.git;a=commitdiff;h=e63e7fde2

The "serial" property and the PCI "addr" property are also available
since 2012 at least, I didn't fully track their origins, but QEMU v1.2
already supported them.

So yes, all these properties should be available in QEMU 1.5 already.

 Thomas

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