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Re: [Qemu-devel] [RFC PATCH v4 00/44] Support Kconfig in QEMU
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [RFC PATCH v4 00/44] Support Kconfig in QEMU |
Date: |
Thu, 24 Jan 2019 02:09:25 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.1 |
On 23/01/19 07:55, Yang Zhong wrote:
> This Kconfig implementation is rebased from Paolo's branch
> https://github.com/bonzini/qemu/commits/kconfig
>
> I rebased most of patches except non-x86 ARCHs dependency definitions
> this time.
> https://github.com/yangzhon/qemu/commits/topic/upstream/Kconfig
>
> The current RFC patches only support
> (*) x86_64 platform build
> Once design is fixed, we can do other archs.
>
> (*) defconfig
> "randconfig" build has some issues, which are mostly related
> with CONFIG* in Kconfig.host abd configure. In randconfig mode,
> some CONFIG* has different setting value in config-host.mak and
> %/config-device.mak, which make QEMU build failure.
>
> (*) Kconfig in hw/ directory
>
> The current configure and build command are same with previous
> commands and if we want to disable or enable some features, like
> "tcg", we still need add "--enable/--disable-tcg" in configure
> command line. If we want to disable one emulation device, we can
> disable this in related Kconfig file in hw/ directory.
>
> The current build command:
> (*) ./configure --target-list=x86_64-softmmu
> (*) make -j8
>
> Since the Kconfig language replace traditional CONFIG_* in
> default-config/%-softmmu.mak, the %-softmmu.mak file only
> define embeded boards or machines, like 440fx and Q35 in x86_64
> platform. The Kconfig has already defined dependency topology
> between different Kconfig files, but there are still some issues
>
> (*) Kconfig for configure(config-host.mak)
> Some CONFIG* in configure need some logic to generate, those
> are hard to input this CONFIG* in Kconfig.host or Kconfig* file.
>
> (*) Kconfig for %config-target.mak
> The CONFIG* in %/config-target.mak file, this is still related
> with configure.
>
> (*) randconfig support issue.
>
> Before this RFC patches, we have talked Kconfig in another thread
> http://lists.nongnu.org/archive/html/qemu-devel/2018-09/msg02827.html
>
> Please give your comments on this RFC thread, many thanks!
I started looking at this, and found two bugs in current code
(unreachable devices that shouldn't be there - SERIAL_ISA for ARM,
ACPI_NVDIMM for MIPS). There are a few issues in that the script is not
Python 3-enabled and only x86 compiles, but they are easily fixed. A
slightly bigger thing is to make VFIO configuration more fine-grained
and express it with kconfig dependencies, but it's just a couple patches
in the same spirit as these ones. I'll look at randconfig next.
Paolo
- [Qemu-devel] [RFC PATCH v4 40/44] hyperv: express dependencies with kconfig, (continued)
- [Qemu-devel] [RFC PATCH v4 40/44] hyperv: express dependencies with kconfig, Yang Zhong, 2019/01/23
- [Qemu-devel] [RFC PATCH v4 39/44] edid: express dependencies with kconfig, Yang Zhong, 2019/01/23
- [Qemu-devel] [RFC PATCH v4 38/44] ptimer: express dependencies with Kconfig, Yang Zhong, 2019/01/23
- [Qemu-devel] [RFC PATCH v4 42/44] i386-softmmu.mak: remove all CONFIG_* except boards definitions, Yang Zhong, 2019/01/23
- [Qemu-devel] [RFC PATCH v4 43/44] minikconf: implement allyesconfig, allnoconfig, randconfig, defconfig, Yang Zhong, 2019/01/23
- [Qemu-devel] [RFC PATCH v4 41/44] virtio: make virtio dependencies with Kconfig, Yang Zhong, 2019/01/23
- [Qemu-devel] [RFC PATCH v4 44/44] Makefile: only support defconfig, Yang Zhong, 2019/01/23
- Re: [Qemu-devel] [RFC PATCH v4 00/44] Support Kconfig in QEMU,
Paolo Bonzini <=
- Re: [Qemu-devel] [RFC PATCH v4 00/44] Support Kconfig in QEMU, no-reply, 2019/01/31