Re: [Qemu-devel] Testing sysbus devices

[Markus Armbruster <armbru@redhat.com>]

Stephen Checkoway <stephen.checkoway@oberlin.edu> writes:

> On Feb 18, 2019, at 13:08, Markus Armbruster <armbru@redhat.com> wrote:
>
>> Stephen Checkoway <stephen.checkoway@oberlin.edu> writes:
>> 
>>> On Feb 18, 2019, at 08:43, Thomas Huth <thuth@redhat.com> wrote:
>>> 
>>>> On 18/02/2019 07.07, Stephen Checkoway wrote:
>>>>> Hi all,
>>>>> 
>>>>> I've been working on some improvements to the pflash_cfi02 block device (interleaved flash devices similar to pflash_cfi01, multi-sector erase, nonuniform sector sizes, and some bug fixes and I'm planning on implementing sector erase suspend/resume commands in the near future).
>> 
>> Any chance you could do multiple region support, too?
>
> Can you point me at the data sheet for a flash chip with multiple region support? For my purposes, I only need the features I mentioned, but if it's a simple change, I'll consider it.

I'm not familiar with CFI pflash, but I can operate a search engine.
Have a look at page 27 and 56 of

https://media.digikey.com/pdf/Data%20Sheets/Intel%20PDFs/28F160C3,320C3,640C3,800C3%20(x16).pdf

and tell us whether it's helpful.

>>>> QTestState *qts;
>>>> qts = qtest_initf(" qemu-system-arm -M musicpal,accel=qtest "
>>>>               "-drive if=pflash,file=%s,format=raw", filename);
>>> 
>>> If I do that, will it be possible for the test to override the properties set by pflash_cfi02_register? It looks like I should be able to use -global to set properties that aren't set explicitly.
>> 
>> Yes.
>> 
>> Won't work for properties set by pflash_cfi02_register(), though.  To
>> test the full range of values there, you'd have to make them
>> configurable somehow.  We currently don't have a good way to do that.
>> Please see
>> 
>>    Subject: Re: Configuring pflash devices for OVMF firmware
>>    Message-ID: <87mun8gd2x.fsf@dusky.pond.sub.org>
>>    https://lists.nongnu.org/archive/html/qemu-devel/2019-02/msg01734.html
>
> I see. That's too bad.

I think a test would be quite welcome even if it only tests what's
testable now with reasonable effort.