Re: [PATCH v2 00/20] hw/i386/pc: Split PIIX3 southbridge from i440FX northbridge

From: Aleksandar Markovic <aleksandar.m.mail@gmail.com>
To: "Philippe Mathieu-Daudé" <philmd@redhat.com>
Cc: "Stefano Stabellini" <sstabellini@kernel.org>,
	"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
	"Paul Durrant" <paul@xen.org>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
	"Eduardo Habkost" <ehabkost@redhat.com>,
	"Hervé Poussineau" <hpoussin@reactos.org>,
	"Aleksandar Markovic" <amarkovic@wavecomp.com>,
	"Igor Mammedov" <imammedo@redhat.com>,
	"Anthony Perard" <anthony.perard@citrix.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Aleksandar Rikalo" <aleksandar.rikalo@rt-rk.com>,
	"Aurelien Jarno" <aurelien@aurel32.net>,
	"Richard Henderson" <rth@twiddle.net>
Subject: Re: [PATCH v2 00/20] hw/i386/pc: Split PIIX3 southbridge from i440FX northbridge
Date: Thu, 24 Oct 2019 21:55:43 +0200	[thread overview]
Message-ID: <CAL1e-=ipp6u=qPj4UEWj+SB=KmDyVnJeOJwH1bQiQmQv1YyANQ@mail.gmail.com> (raw)
In-Reply-To: <20191018134754.16362-1-philmd@redhat.com>

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On Friday, October 18, 2019, Philippe Mathieu-Daudé <philmd@redhat.com>
wrote:

> Changes since v1 [0]:
> - Removed patch reintroducing DO_UPCAST() use (thuth)
> - Took various patches out to reduce series (thuth)
> - Added review tags (thanks all for reviewing!)
>
>
Philippe,

Do you intend to submit v3? The softfreeze is close.

A.

> $ git backport-diff -u pc_split_i440fx_piix-v1 -r mc146818rtc_init..
> Key:
> [----] : patches are identical
> [####] : number of functional differences between upstream/downstream patch
> [down] : patch is downstream-only
> The flags [FC] indicate (F)unctional and (C)ontextual differences,
> respectively
>
> 001/20:[----] [--] 'MAINTAINERS: Keep PIIX4 South Bridge separate from PC
> Chipsets'
> 002/20:[0011] [FC] 'piix4: add Reset Control Register'
> 003/20:[0014] [FC] 'piix4: add a i8259 interrupt controller as specified
> in datasheet'
> 004/20:[----] [--] 'Revert "irq: introduce qemu_irq_proxy()"'
> 005/20:[----] [--] 'piix4: rename PIIX4 object to piix4-isa'
> 006/20:[----] [-C] 'piix4: add a i8257 dma controller as specified in
> datasheet'
> 007/20:[----] [-C] 'piix4: add a i8254 pit controller as specified in
> datasheet'
> 008/20:[----] [-C] 'piix4: add a mc146818rtc controller as specified in
> datasheet'
> 009/20:[----] [--] 'hw/mips/mips_malta: Create IDE hard drive array
> dynamically'
> 010/20:[----] [--] 'hw/mips/mips_malta: Extract the PIIX4 creation code as
> piix4_create()'
> 011/20:[----] [--] 'hw/isa/piix4: Move piix4_create() to hw/isa/piix4.c'
> 012/20:[----] [--] 'hw/i386: Remove obsolete LoadStateHandler::load_state_old
> handlers'
> 013/20:[----] [--] 'hw/pci-host/piix: Extract piix3_create()'
> 014/20:[0010] [FC] 'hw/pci-host/piix: Move RCR_IOPORT register definition'
> 015/20:[----] [--] 'hw/pci-host/piix: Define and use the PIIX IRQ Route
> Control Registers'
> 016/20:[----] [--] 'hw/pci-host/piix: Move i440FX declarations to
> hw/pci-host/i440fx.h'
> 017/20:[----] [--] 'hw/pci-host/piix: Fix code style issues'
> 018/20:[0012] [FC] 'hw/pci-host/piix: Extract PIIX3 functions to
> hw/isa/piix3.c'
> 019/20:[----] [--] 'hw/pci-host: Rename incorrectly named 'piix' as
> 'i440fx''
> 020/20:[----] [-C] 'hw/pci-host/i440fx: Remove the last PIIX3 traces'
>
> Previous cover:
>
> This series is a rework of "piix4: cleanup and improvements" [1]
> from Hervé, and my "remove i386/pc dependency: PIIX cleanup" [2].
>
> Still trying to remove the strong X86/PC dependency 2 years later,
> one step at a time.
> Here we split the PIIX3 southbridge from i440FX northbridge.
> The i440FX northbridge is only used by the PC machine, while the
> PIIX southbridge is also used by the Malta MIPS machine.
>
> This is also a step forward using KConfig with the Malta board.
> Without this split, it was impossible to compile the Malta without
> pulling various X86 pieces of code.
>
> The overall design cleanup is not yet perfect, but enough to post
> as a series.
>
> Now that the PIIX3 code is extracted, the code duplication with the
> PIIX4 chipset is obvious. Not worth improving for now because it
> isn't broken.
>
> [0] https://lists.gnu.org/archive/html/qemu-devel/2019-10/msg03685.html
> [1] https://www.mail-archive.com/qemu-devel@nongnu.org/msg500737.html
> [2] https://www.mail-archive.com/qemu-devel@nongnu.org/msg504081.html
>
> Based-on: <20191018133547.10936-1-philmd@redhat.com>
> mc146818rtc: Allow call object_initialize(MC146818_RTC) instead of
> rtc_init()
> https://mid.mail-archive.com/20191018133547.10936-1-philmd@redhat.com
>
> Hervé Poussineau (5):
>   piix4: Add the Reset Control Register
>   piix4: Add a i8259 Interrupt Controller as specified in datasheet
>   piix4: Rename PIIX4 object to piix4-isa
>   piix4: Add a i8257 DMA Controller as specified in datasheet
>   piix4: Add a i8254 PIT Controller as specified in datasheet
>
> Philippe Mathieu-Daudé (15):
>   MAINTAINERS: Keep PIIX4 South Bridge separate from PC Chipsets
>   Revert "irq: introduce qemu_irq_proxy()"
>   piix4: Add a MC146818 RTC Controller as specified in datasheet
>   hw/mips/mips_malta: Create IDE hard drive array dynamically
>   hw/mips/mips_malta: Extract the PIIX4 creation code as piix4_create()
>   hw/isa/piix4: Move piix4_create() to hw/isa/piix4.c
>   hw/i386: Remove obsolete LoadStateHandler::load_state_old handlers
>   hw/pci-host/piix: Extract piix3_create()
>   hw/pci-host/piix: Move RCR_IOPORT register definition
>   hw/pci-host/piix: Define and use the PIIX IRQ Route Control Registers
>   hw/pci-host/piix: Move i440FX declarations to hw/pci-host/i440fx.h
>   hw/pci-host/piix: Fix code style issues
>   hw/pci-host/piix: Extract PIIX3 functions to hw/isa/piix3.c
>   hw/pci-host: Rename incorrectly named 'piix' as 'i440fx'
>   hw/pci-host/i440fx: Remove the last PIIX3 traces
>
>  MAINTAINERS                      |  14 +-
>  hw/acpi/pcihp.c                  |   2 +-
>  hw/acpi/piix4.c                  |  42 +--
>  hw/core/irq.c                    |  14 -
>  hw/i386/Kconfig                  |   3 +-
>  hw/i386/acpi-build.c             |   5 +-
>  hw/i386/pc_piix.c                |  10 +-
>  hw/i386/xen/xen-hvm.c            |   5 +-
>  hw/intc/apic_common.c            |  49 ----
>  hw/isa/Kconfig                   |   4 +
>  hw/isa/Makefile.objs             |   1 +
>  hw/isa/piix3.c                   | 399 +++++++++++++++++++++++++++++
>  hw/isa/piix4.c                   | 151 ++++++++++-
>  hw/mips/gt64xxx_pci.c            |   5 +-
>  hw/mips/mips_malta.c             |  46 +---
>  hw/pci-host/Kconfig              |   3 +-
>  hw/pci-host/Makefile.objs        |   2 +-
>  hw/pci-host/{piix.c => i440fx.c} | 424 +------------------------------
>  hw/timer/i8254_common.c          |  40 ---
>  include/hw/acpi/piix4.h          |   6 -
>  include/hw/i386/pc.h             |  37 ---
>  include/hw/irq.h                 |   5 -
>  include/hw/isa/isa.h             |   2 +
>  include/hw/pci-host/i440fx.h     |  36 +++
>  include/hw/southbridge/piix.h    |  74 ++++++
>  stubs/pci-host-piix.c            |   3 +-
>  26 files changed, 699 insertions(+), 683 deletions(-)
>  create mode 100644 hw/isa/piix3.c
>  rename hw/pci-host/{piix.c => i440fx.c} (58%)
>  delete mode 100644 include/hw/acpi/piix4.h
>  create mode 100644 include/hw/pci-host/i440fx.h
>  create mode 100644 include/hw/southbridge/piix.h
>
> --
> 2.21.0
>
>
>

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