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Re: [Qemu-devel] [PATCH v4 24/26] qidl: add QAPI-based code generator
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH v4 24/26] qidl: add QAPI-based code generator |
Date: |
Mon, 15 Oct 2012 15:08:51 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121009 Thunderbird/16.0 |
Il 15/10/2012 10:12, Paolo Bonzini ha scritto:
> Il 12/10/2012 23:11, Michael Roth ha scritto:
>> + elif field['type'].startswith('enum '):
>> + typename = 'int'
>
> Note that there is support for enum properties in qdev. Please consider
> adding it, though it can be done as a follow-up.
>
> I'm going to play a bit with the series and convert 1 or 2 devices
> myself to see how it looks, then I'll give my acked-by.
Ok, so now I played with it a bit. My main comments, which can all be
tackled as a follow-up, are:
- immutable/derived/broken/elsewhere (and the default, let's call it
serialized) are really five cases of the same QIDL property. Perhaps
this could be enforced in the extended syntax like this:
#define q_immutable QIDL(serialize(immutable))
#define q_derived QIDL(serialize(derived))
#define q_broken QIDL(serialize(broken))
#define q_elsewhere QIDL(serialize(elsewhere))
I would also make it possible to explicitly specify the fifth state, if
only for symmetry.
I'm not sure what your plans are for q_derived vs. VMState. If a field
X is set in pre_save hooks based on field Y, how should the fields be
set? X is usually not up-to-date, so it should be q_derived. But Y
cannot be serialized as is, so it should be q_elsewhere. One of the
two is wrong, which one? :)
- q_properties are also always q_immutable. I think this should be
enforced in the code generator.
- it would be _much_ better if you could automatically derive properties
information for embedded structs. For example, Notifiers and qemu_irqs
are always q_immutable. NotifierLists probably are always q_elsewhere,
because the owner of the notifiers should add themselves back.
In general, if struct X is QIDL_DECLAREd and only has q_immutable
fields, it can be taken as q_immutable. Hence for example the base
class should not need any decoration; ISADevice will be seen as
q_immutable, but PCIDevice will be seen as serialized. But even if a
struct is not QIDL_DECLAREd, it should be possible to apply a tag to a
typedef, and have it always applied to the members.
Paolo
- [Qemu-devel] [PATCH v4 17/26] qom-fuse: force single-threaded mode to avoid QMP races, (continued)
- [Qemu-devel] [PATCH v4 17/26] qom-fuse: force single-threaded mode to avoid QMP races, Michael Roth, 2012/10/12
- [Qemu-devel] [PATCH v4 18/26] qom-fuse: workaround for truncated properties > 4096, Michael Roth, 2012/10/12
- [Qemu-devel] [PATCH v4 16/26] qapi: Improve existing docs and document annotated QAPI types, Michael Roth, 2012/10/12
- [Qemu-devel] [PATCH v4 20/26] qdev: move Property-related declarations to qdev-properties.h, Michael Roth, 2012/10/12
- [Qemu-devel] [PATCH v4 21/26] qidl: add documentation, Michael Roth, 2012/10/12
- [Qemu-devel] [PATCH v4 22/26] qidl: add lexer library (based on QC parser), Michael Roth, 2012/10/12
- [Qemu-devel] [PATCH v4 23/26] qidl: add C parser (based on QC parser), Michael Roth, 2012/10/12
- [Qemu-devel] [PATCH v4 24/26] qidl: add QAPI-based code generator, Michael Roth, 2012/10/12
- Re: [Qemu-devel] [PATCH v4 24/26] qidl: add QAPI-based code generator, Paolo Bonzini, 2012/10/15
- Re: [Qemu-devel] [PATCH v4 24/26] qidl: add QAPI-based code generator,
Paolo Bonzini <=
- Re: [Qemu-devel] [PATCH v4 24/26] qidl: add QAPI-based code generator, Michael Roth, 2012/10/15
- Re: [Qemu-devel] [PATCH v4 24/26] qidl: add QAPI-based code generator, Michael Roth, 2012/10/15
- Re: [Qemu-devel] [PATCH v4 24/26] qidl: add QAPI-based code generator, Paolo Bonzini, 2012/10/16
- Re: [Qemu-devel] [PATCH v4 24/26] qidl: add QAPI-based code generator, Michael Roth, 2012/10/18
- Re: [Qemu-devel] [PATCH v4 24/26] qidl: add QAPI-based code generator, Paolo Bonzini, 2012/10/19
[Qemu-devel] [PATCH v4 25/26] qidl: qidl.h, definitions for qidl annotations, Michael Roth, 2012/10/12
[Qemu-devel] [PATCH v4 26/26] qidl: unit tests and build infrastructure, Michael Roth, 2012/10/12