Reading register at offset. It is not fully implemented warning make VM impossible to use

[Julien Duponchelle]

Hi,

Since this commit:
https://github.com/qemu/qemu/commit/bc0f0674f037a01f2ce0870ad6270a356a7a8347

We can no longer use the IOSvL2 image from Cisco. The problem is we got a lot of warning message saying:
e1000: Reading register at offset: 0x00002410. It is not fully implemented.

User got so much of this warning that they can't use the VM.

Thanks for the help

[Stefan Hajnoczi (stefanha)]

On Fri, Mar 17, 2017 at 09:47:14AM -0000, Julien Duponchelle wrote:
> Hi,
>
> Since this commit:
> https://github.com/qemu/qemu/commit/bc0f0674f037a01f2ce0870ad6270a356a7a8347
>
> We can no longer use the IOSvL2 image from Cisco. The problem is we got a lot of warning message saying:
> e1000: Reading register at offset: 0x00002410. It is not fully implemented.
>
> User got so much of this warning that they can't use the VM.

CCing the author and maintainers.

DBGOUT() is compiled in by default. Warnings that can be triggered at a
high rate by the guest should be off by default or use a
printf_once()-style macro so they are only printed once and not again.

Leonid: do you want to adjust e1000 DBGOUT() usage to avoid printing
guest-triggerable messages by default?

Stefan

[Peter Maydell (pmaydell)]

On 20 March 2017 at 14:20, Stefan Hajnoczi <email address hidden> wrote:
> On Fri, Mar 17, 2017 at 09:47:14AM -0000, Julien Duponchelle wrote:
>> Hi,
>>
>> Since this commit:
>> https://github.com/qemu/qemu/commit/bc0f0674f037a01f2ce0870ad6270a356a7a8347
>>
>> We can no longer use the IOSvL2 image from Cisco. The problem is we got a lot of warning message saying:
>> e1000: Reading register at offset: 0x00002410. It is not fully implemented.
>>
>> User got so much of this warning that they can't use the VM.
>
> CCing the author and maintainers.
>
> DBGOUT() is compiled in by default. Warnings that can be triggered at a
> high rate by the guest should be off by default or use a
> printf_once()-style macro so they are only printed once and not again.
>
> Leonid: do you want to adjust e1000 DBGOUT() usage to avoid printing
> guest-triggerable messages by default?

If we want to report "whoops, we don't implement this yet" messages then
the recommended way to do that is
 qemu_log_mask(LOG_UNIMP, "....");

(these are not reported by default but only if the user asks for them.)

thanks
-- PMM

[Jason Wang (jasowang)]

On 2017年03月20日 22:58, Peter Maydell wrote:
> On 20 March 2017 at 14:20, Stefan Hajnoczi <email address hidden> wrote:
>> On Fri, Mar 17, 2017 at 09:47:14AM -0000, Julien Duponchelle wrote:
>>> Hi,
>>>
>>> Since this commit:
>>> https://github.com/qemu/qemu/commit/bc0f0674f037a01f2ce0870ad6270a356a7a8347
>>>
>>> We can no longer use the IOSvL2 image from Cisco. The problem is we got a lot of warning message saying:
>>> e1000: Reading register at offset: 0x00002410. It is not fully implemented.
>>>
>>> User got so much of this warning that they can't use the VM.
>> CCing the author and maintainers.
>>
>> DBGOUT() is compiled in by default. Warnings that can be triggered at a
>> high rate by the guest should be off by default or use a
>> printf_once()-style macro so they are only printed once and not again.
>>
>> Leonid: do you want to adjust e1000 DBGOUT() usage to avoid printing
>> guest-triggerable messages by default?
> If we want to report "whoops, we don't implement this yet" messages then
> the recommended way to do that is
> qemu_log_mask(LOG_UNIMP, "....");
>
> (these are not reported by default but only if the user asks for them.)
>
> thanks
> -- PMM
>

I don't see a reason that enabling E1000E_DEBUG by default. How about
just disable it by default?

Thanks

[Julien Duponchelle (noplay)]

I sent a patch to the mailing list:
http://lists.nongnu.org/archive/html/qemu-devel/2017-05/msg01294.html

[Thomas Huth (th-huth)]

I think this has been fixed by:
https://git.qemu.org/?p=qemu.git;a=commitdiff;h=b4053c64833