Re: [Qemu-devel] [PATCH] configure: Automatically fall back to TCI on non-release architectures

[Philippe Mathieu-Daudé]

On 4/5/19 11:02 AM, Daniel P. Berrangé wrote:
> On Fri, Apr 05, 2019 at 10:47:54AM +0200, Philippe Mathieu-Daudé wrote:
>> Hi Helge,
>>
>> On 4/5/19 9:56 AM, Helge Deller wrote:
>>> On 05.04.19 03:34, Peter Maydell wrote:
>>>> On Fri, 5 Apr 2019 at 01:59, Helge Deller <address@hidden> wrote:
>>>>> If a non-release architecture is found, and it's known that there is no
>>>>> native TCG support for that CPU, automatically fall back to the TCI
>>>>> implementation instead of requesting the user to run configure again
>>>>> with the --enable-tcg-interpreter option.
>>>>>
>>>>> This change simplifies building qemu in automatic build environments
>>>>> (like in my case the debian buildds) because one does not need to
>>>>> special case on the architectures.
>>>>
>>>> I don't think we should do this. TCI is unmaintained, has several
>>>> known flaws,
>>>
>>> Just out of interest: Is there a list with those flaws somewhere?
>>
>> The last big discussion is in this thread:
>> https://lists.gnu.org/archive/html/qemu-devel/2017-06/msg06528.html

I just noticed this link doesn't show the full thread replies list, and
want to point out Stefan's one:

https://lists.gnu.org/archive/html/qemu-devel/2017-06/msg06841.html

I guess remember someone (Thomas? you Daniel?) posting a link of 3 forks
using TCI for reverse engineering but I can't find it to check if they
are still active.

> Do the various crashes that you illustrate in that cover letter
> still exist today ? If so, 2 years of continued brokenness with no
> fixes would reinforce the the view that it is time to remove TCI
> from the codebase.

Or find a maintainer and add tests...