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Re: [Qemu-devel] [RFC PATCH 04/13] tests/tcg/mips: enable mips32-dsp/mip

From: Alex Bennée
Subject: Re: [Qemu-devel] [RFC PATCH 04/13] tests/tcg/mips: enable mips32-dsp/mips32-dspr2/mipsr5900 linux-user (WIP)
Date: Tue, 11 Dec 2018 12:17:50 +0000
User-agent: mu4e 1.1.0; emacs 26.1.90

Aleksandar Markovic <address@hidden> writes:

> On Dec 10, 2018 4:29 PM, "Alex Bennée" <address@hidden> wrote:
>> Convert the existing tests to use our common cross build
>> infrastructure.
>> [WIP: mips32r2 disabled to avoid name clash]
>> [WIP: mipsr5900 disabled due to clashing build flags]
>> Signed-off-by: Alex Bennée <address@hidden>
>> ---
>>  tests/tcg/mips/Makefile.target       |  15 ++-
>>  tests/tcg/mips/mips32-dsp/Makefile   | 166 +++++----------------------
>>  tests/tcg/mips/mips32-dspr2/Makefile |  83 +++-----------
>>  tests/tcg/mips/mipsr5900/Makefile    |  40 +++----
>>  4 files changed, 75 insertions(+), 229 deletions(-)
> Thank you Alex for this initiative.
> For DSP, following MIPS CPUs in QEMU support DSP:
> DSP: 24KEc (MIPS32R2),  34Kf (MIPS32R2), 74Kf (MIPS32R2), mips64dspr2
> (MIPS64R2),
> DSP R2: mips64dspr2 (MIPS64R2),

That's why I'm confused by a mips32-dspr2 directory. Does that mean both
of those directories run on the 74Kf processor model (MIPS32R2)?

> (For simplicity, I didn't mention new nanoMIPS architecture, since your gcc
> for sure don't support it yet)
> In brackets, those are architectures that are usually required to be passed
> to gcc as its option, and that explains the switch involving MIPS64R2 for
> DSP R2.
> Whereas while starting QEMU, CPU name should be specified in -cpu switch.
> mips64dspr2 is a virtual cpu (doesn't model any real cpu) made specifically
> for DSP R2 testings, hence such odd name.
> Hopefully this clarifies some of your dilemmas.
> What are name clashes that you mention? Are they just related to
> filenames?

I think it is because there are a bunch of names in both mips32-dsp and
mips32-dspr2 that are the same. I thought that should be sorted by the
fact I only set the VPATH to tests/tcg/mips and added the tests
including their dir path but for some reason it wasn't working.

Alex Bennée

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