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Re: [Qemu-devel] [PATCH v4 3/5] s390x/cpumodel: Set up CPU model for AP


From: Tony Krowiak
Subject: Re: [Qemu-devel] [PATCH v4 3/5] s390x/cpumodel: Set up CPU model for AP device support
Date: Tue, 8 May 2018 06:46:48 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0

On 04/22/2018 12:01 PM, Halil Pasic wrote:


On 04/22/2018 05:43 PM, Tony Krowiak wrote:
+    FEAT_INIT_MISC("ap", "AP facilities installed"),

Why plural ('facilities')? Would not s/facilities/instructions be more end-user
friendly?

It's a matter of opinion. I prefer facilities because AP is comprised of not only
instructions, but also AP processors.

Please elaborate. You mean processors like AP cards? If yes what if the matrix is empty (e.g. the state we decided is the default when no further action is taken (assign queues to the vfio-ap kernel driver, set up an mdev, -device vfio-ap on
qemu cmd line))?

I just wanted to point out that this plural is very vague. Not speaking about that QCI should be an AP facility too, but is not included in this 'features' and is not covered by this cpu model feature. It has it's own cpu model feature and even a
dedicated STFLE bit.

FYI, I decided to take your suggestion and go with 'AP instructions installed'.



Regards,
Halil





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