This series consolidates the implementations of the PIIX3 and PIIX4 south
bridges and is an extended version of [1]. The motivation is to share as much
code as possible and to bring both device models to feature parity such that
perhaps PIIX4 can become a drop-in-replacement for PIIX3 in the pc machine. This
could resolve the "Frankenstein" PIIX4-PM problem in PIIX3 discussed on this
list before.
The series is structured as follows: First, PIIX3 is changed to instantiate
internal devices itself, like PIIX4 does already. Second, PIIX3 gets prepared
for the merge with PIIX4 which includes some fixes, cleanups, and renamings.
Third, the same is done for PIIX4. In step four the implementations are merged.
Since some consolidations could be done easier with merged implementations, the
consolidation continues in step five which concludes the series. Note that the
first three patches are only included to avoid merge conflicts with mips-next
-- please ignore.
One particular challenge in this series was that the PIC of PIIX3 used to be
instantiated outside of the south bridge while some sub functions require a PIC
with populated qemu_irqs. This has been solved by introducing a proxy PIC which
furthermore allows PIIX3 to be agnostic towards the virtualization technology
used (KVM, TCG, Xen). Due to consolidation PIIX4 gained the proxy PIC as well.
Another challenge was dealing with optional devices where Peter already gave
advice in [1] which this series implements.
Last but not least there might be some opportunity to consolidate VM state
handling, probably by reusing the one from PIIX3. Since I'm not very familiar
with the requirements I didn't touch it so far.
v5:
- Pick up Reviewed-by tags from
https://lists.nongnu.org/archive/html/qemu-devel/2023-01/msg00116.html
- Add patch to make usage of the isa_pic global more type-safe
- Re-introduce isa-pic as PIC specific proxy (Mark)
Note that both patches are unreviewed -> Mark?
Furthermore, patch 'hw/i386/pc_piix: Associate pci_map_irq_fn as soon as PCI bus
is created' needs review and could be merged into
https://lists.nongnu.org/archive/html/qemu-devel/2022-11/msg03312.html .
Testing done:
* make check
* Boot live CD:
* `qemu-system-x86_64 -M pc -m 2G -accel kvm -cpu host -cdrom
manjaro-kde-21.3.2-220704-linux515.iso`
* `qemu-system-x86_64 -M q35 -m 2G -accel kvm -cpu host -cdrom
manjaro-kde-21.3.2-220704-linux515.iso`
* 'qemu-system-mips64el -M malta -kernel vmlinux-3.2.0-4-5kc-malta -hda
debian_wheezy_mipsel_standard.qcow2 -append "root=/dev/sda1 console=ttyS0"`
Based-on: <20221120150550.63059-1-shentey@gmail.com>
"[PATCH v2 0/3] Decouple INTx-to-LNKx routing from south bridges"
v4:
- Rebase onto "[PATCH v2 0/3] Decouple INTx-to-LNKx routing from south bridges"
since it is already queued via mips-next. This eliminates patches
'hw/isa/piix3: Prefix pci_slot_get_pirq() with "piix3_"' and 'hw/isa/piix4:
Prefix pci_slot_get_pirq() with "piix4_"'.
- Squash 'hw/isa/piix: Drop the "3" from the PIIX base class' into
'hw/isa/piix3: Rename typedef PIIX3State to PIIXState'. I originally only
split these patches since I wasn't sure whether renaming a type was allowed.
- Add new patch 'hw/i386/pc_piix: Associate pci_map_irq_fn as soon as PCI bus is
created' for forther cleanup of INTx-to-LNKx route decoupling.
v3:
- Introduce one TYPE_ICH9_USB_UHCI(fn) rather than several TYPE_ICH9_USB_UHCIx
(Philippe)
- Make proxy PIC generic (Philippe)
- Track Malta's PIIX dependencies through KConfig
- Rebase onto Philippe's 'hw/isa/piix4: Remove MIPS Malta specific bits' series
[3]
- Also rebase onto latest master to resolve merge conflicts. This required
copying Philippe's series as first three patches - please ignore.
v2:
- Introduce TYPE_ defines for IDE and USB device models (Mark)
- Omit unexporting of PIIXState (Mark)
- Improve commit message of patch 5 to mention reset triggering through PCI
configuration space (Mark)
- Move reviewed patches w/o dependencies to the bottom of the series for early
upstreaming
[1] https://lists.nongnu.org/archive/html/qemu-devel/2022-07/msg02348.html
[2] https://lists.nongnu.org/archive/html/qemu-devel/2022-11/msg03310.html
[3] https://lists.nongnu.org/archive/html/qemu-devel/2022-10/msg05367.html
Bernhard Beschow (28):
hw/mips/Kconfig: Track Malta's PIIX dependencies via Kconfig
hw/usb/hcd-uhci: Introduce TYPE_ defines for device models
hw/i386/pc_piix: Associate pci_map_irq_fn as soon as PCI bus is
created
hw/i386/pc_piix: Allow for setting properties before realizing PIIX3
south bridge
hw/i386/pc: Create RTC controllers in south bridges
hw/i386/pc: No need for rtc_state to be an out-parameter
hw/isa/piix3: Create USB controller in host device
hw/isa/piix3: Create power management controller in host device
hw/intc/i8259: Make using the isa_pic singleton more type-safe
hw/intc/i8259: Introduce i8259 proxy "isa-pic"
hw/isa/piix3: Create ISA PIC in host device
hw/isa/piix3: Create IDE controller in host device
hw/isa/piix3: Wire up ACPI interrupt internally
hw/isa/piix3: Resolve redundant PIIX_NUM_PIC_IRQS
hw/isa/piix3: Rename pci_piix3_props for sharing with PIIX4
hw/isa/piix3: Rename piix3_reset() for sharing with PIIX4
hw/isa/piix3: Drop the "3" from PIIX base class
hw/isa/piix4: Make PIIX4's ACPI and USB functions optional
hw/isa/piix4: Remove unused inbound ISA interrupt lines
hw/isa/piix4: Use ISA PIC device
hw/isa/piix4: Reuse struct PIIXState from PIIX3
hw/isa/piix4: Rename reset control operations to match PIIX3
hw/isa/piix3: Merge hw/isa/piix4.c
hw/isa/piix: Harmonize names of reset control memory regions
hw/isa/piix: Reuse PIIX3 base class' realize method in PIIX4
hw/isa/piix: Rename functions to be shared for interrupt triggering
hw/isa/piix: Consolidate IRQ triggering
hw/isa/piix: Share PIIX3's base class with PIIX4
Philippe Mathieu-Daudé (3):
hw/mips/malta: Introduce PIIX4_PCI_DEVFN definition
hw/mips/malta: Set PIIX4 IRQ routes in embedded bootloader
hw/isa/piix4: Correct IRQRC[A:D] reset values
configs/devices/mips-softmmu/common.mak | 2 -
hw/usb/hcd-uhci.h | 4 +
include/hw/i386/ich9.h | 2 +
include/hw/i386/pc.h | 2 +-
include/hw/intc/i8259.h | 25 +-
include/hw/southbridge/piix.h | 30 ++-
include/qemu/typedefs.h | 1 +
hw/i386/pc.c | 16 +-
hw/i386/pc_piix.c | 77 +++---
hw/i386/pc_q35.c | 16 +-
hw/intc/i8259.c | 38 ++-
hw/isa/lpc_ich9.c | 8 +
hw/isa/{piix3.c => piix.c} | 274 ++++++++++++++++-----
hw/isa/piix4.c | 302 ------------------------
hw/mips/malta.c | 38 ++-
hw/usb/hcd-uhci.c | 16 +-
MAINTAINERS | 6 +-
hw/i386/Kconfig | 4 +-
hw/isa/Kconfig | 8 +-
hw/isa/meson.build | 3 +-
hw/mips/Kconfig | 2 +
21 files changed, 419 insertions(+), 455 deletions(-)
rename hw/isa/{piix3.c => piix.c} (57%)
delete mode 100644 hw/isa/piix4.c