Re: [Qemu-devel] [PATCH] display: stop using DT_NOGRAPHIC, use DT_NONE

[Anthony Liguori <aliguori@us.ibm.com>]

Michael Tokarev <mjt@tls.msk.ru> writes:

> 09.07.2013 22:37, Anthony Liguori wrote:
>> Michael Tokarev <mjt@tls.msk.ru> writes:
>> 
>>> It looks like initially there was -nographic option to turn
>>> off display, now there's another option of the same sort,
>>> -display none.  But code in other places of qemu checks for
>>> DT_NOGRAPHIC and does not work well with -display none.
>>> Make DT_NOGRAPHIC an internal version which selects DT_NONE,
>>> and check for that in all other places where previously we
>>> checked for DT_NOGRAPHIC.
> []
>> Breaks make check:
>> 
>> main-loop: WARNING: I/O thread spun for 1000 iterations
>> **
>> ERROR:/home/aliguori/git/qemu/tests/fw_cfg-test.c:63:test_fw_cfg_nographic: assertion failed (qfw_cfg_get_u16(fw_cfg, FW_CFG_NOGRAPHIC) == 0): (1 == 0)
>> GTester: last random seed: R02S25031265f05e4d41efcf758c9ef6043b
>
> Sure, because the test is bogus.

No, it's a guest ABI.  You cannot change the guest ABI.

-display none != -nographic.

nographic gives you -display none plus a stdio serial port (with muxing
magic).

-display none should not imply stdio serial port.  The vc goes to a
dummy display.  That's a major semantic difference.

Regards,

Anthony Liguori

> Should I remove this bogus test?
>
> Thanks,
>
> /mjt