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[Qemu-devel] [PATCH 0/6] generalize parsing of cpu_model (x86/arm)
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From: |
Igor Mammedov |
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Subject: |
[Qemu-devel] [PATCH 0/6] generalize parsing of cpu_model (x86/arm) |
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Date: |
Mon, 4 Sep 2017 16:00:56 +0200 |
Issue 1:
Some callers call CPUClass->parse_features manually to convert
'-cpu cpufoo,featurestr' string to cpu type and featurestr
into a set of global properties and then do controlled
cpu creation with setting properties and completing it with realize.
That's a lot of code duplication as they all are practically
reimplement the same parsing logic.
Some use cpu_generic_init() instead which does the same parsing
along with creation/realizing cpu within one wrapper.
And some trying to switch to controlled cpu creation,
implement object_new()/set properties/realize steps
but forget feature parsing logic witch leads to 'bugs'
commit (00909b585 hw/arm/integratorcp: Support specifying features via -cpu)
Issue 2:
Default cpu model selection logic is spread over all board's
machine_init() fuctions but it's basicallyi hardcodes default
cpu model string in init function.
if (!cpu_model) {
cpu_model = "some cpu model string";
}
and written in different ways.
it forces machine_init callbacks to parse cpu_model string
either by using cpu_generic_init() or by manually calling
cpu_class_by_name()/CPUClass::parse_features to perform
name to cpu type translation.
This series moves -cpu option parsing to generic machine code
that removes some of code duplication and makes cpus creation
process more generic/simple:
* unify default (fallback) cpu type handling by replacing
hardcoded cpu_model strings with cpu type directly in
machine_foo_class_init() {
MachineClass::default_cpu_type = BOARD_DEFAULT_CPU_TYPE
}
which allows to generalize move cpu model parsing instead of
parsing it in each board.
* make generic machine vl.c parse cpu_model into properties/cpu_type
and let boards use cpu_type without any cpu_model prasing.
Generic parsing will kick in only if board advertises its support
by setting MachineClass::default_cpu_type to a cpu type.
PS:
I intend make tree-wide conversion but as one series it's too many patches,
so I'm splitting out it into an intial series that implements generic
part and several patchsets that will do per target conversion.
As part of initial series x86 and ARM targets conversion is included
to showcase generalization usage. Per target conversions are done
as 1 patch per target, it might be too much for targets that have lots
of boards (ARM) so let me know if you'd like to split it on per board
basis (then I'll respin it as separate series on top of generic patches)
github tree for testing:
https://github.com/imammedo/qemu.git default_machine_cpu_type_PC_ARM
CC: Eduardo Habkost <address@hidden>
CC: Andrew Jones <address@hidden>
CC: Richard Henderson <address@hidden>
Igor Mammedov (6):
qom: cpus: split cpu_generic_init() on feature parsing and cpu
creation parts
cpu: make cpu_generic_init() abort QEMU on error
cpu: rename cpu_parse_features() to cpu_parse_cpu_model()
vl.c: convert cpu_model to cpu type and set of global properties
before machine_init()
pc: use generic cpu_model parsing
arm: drop intermadiate cpu_model -> cpu type parsing and use cpu type
directly
include/hw/arm/armv7m.h | 2 +-
include/hw/arm/aspeed_soc.h | 2 +-
include/hw/arm/stm32f205_soc.h | 2 +-
include/hw/boards.h | 6 ++++++
include/qom/cpu.h | 22 +++++++++++++++++++
target/arm/cpu.h | 3 +++
target/i386/cpu.h | 9 ++++++++
bsd-user/main.c | 4 ----
hw/alpha/dp264.c | 4 ----
hw/arm/armv7m.c | 40 +++++-----------------------------
hw/arm/aspeed_soc.c | 13 +++++------
hw/arm/collie.c | 10 +++------
hw/arm/exynos4210.c | 6 +-----
hw/arm/gumstix.c | 5 +++--
hw/arm/highbank.c | 10 ++++-----
hw/arm/integratorcp.c | 30 ++------------------------
hw/arm/mainstone.c | 9 ++++----
hw/arm/mps2.c | 17 ++++++---------
hw/arm/musicpal.c | 11 ++--------
hw/arm/netduino2.c | 2 +-
hw/arm/nseries.c | 4 +++-
hw/arm/omap1.c | 11 ++--------
hw/arm/omap2.c | 8 ++-----
hw/arm/omap_sx1.c | 5 ++++-
hw/arm/palm.c | 5 +++--
hw/arm/pxa2xx.c | 18 ++++------------
hw/arm/realview.c | 25 +++++----------------
hw/arm/spitz.c | 12 ++++++-----
hw/arm/stellaris.c | 16 ++++++--------
hw/arm/stm32f205_soc.c | 4 ++--
hw/arm/strongarm.c | 15 +++----------
hw/arm/tosa.c | 4 ----
hw/arm/versatilepb.c | 15 +++----------
hw/arm/vexpress.c | 32 +++++++++------------------
hw/arm/virt.c | 46 ++++++++-------------------------------
hw/arm/xilinx_zynq.c | 10 ++-------
hw/arm/z2.c | 9 +++-----
hw/i386/pc.c | 41 +++++------------------------------
hw/i386/pc_piix.c | 4 +---
hw/lm32/lm32_boards.c | 8 -------
hw/lm32/milkymist.c | 4 ----
hw/m68k/an5206.c | 4 ----
hw/m68k/mcf5208.c | 4 ----
hw/mips/cps.c | 4 ----
hw/mips/mips_fulong2e.c | 4 ----
hw/mips/mips_jazz.c | 4 ----
hw/mips/mips_malta.c | 4 ----
hw/mips/mips_mipssim.c | 4 ----
hw/mips/mips_r4k.c | 4 ----
hw/moxie/moxiesim.c | 4 ----
hw/openrisc/openrisc_sim.c | 4 ----
hw/ppc/e500.c | 4 ----
hw/ppc/mac_newworld.c | 4 ----
hw/ppc/mac_oldworld.c | 4 ----
hw/ppc/ppc440_bamboo.c | 4 ----
hw/ppc/ppc4xx_devs.c | 5 -----
hw/ppc/prep.c | 9 --------
hw/ppc/virtex_ml507.c | 4 ----
hw/sh4/r2d.c | 4 ----
hw/sh4/shix.c | 4 ----
hw/sparc/leon3.c | 4 ----
hw/sparc/sun4m.c | 4 ----
hw/sparc64/sparc64.c | 4 ----
hw/tricore/tricore_testboard.c | 4 ----
hw/unicore32/puv3.c | 4 ----
hw/xtensa/sim.c | 5 -----
hw/xtensa/xtfpga.c | 5 -----
linux-user/main.c | 4 ----
qom/cpu.c | 49 ++++++++++++++++++++++++++----------------
target/arm/cpu.c | 2 +-
target/i386/cpu.c | 3 ---
vl.c | 10 +++++++++
72 files changed, 198 insertions(+), 485 deletions(-)
--
2.7.4
- [Qemu-devel] [PATCH 0/6] generalize parsing of cpu_model (x86/arm),
Igor Mammedov <=
[Qemu-devel] [PATCH 4/6] vl.c: convert cpu_model to cpu type and set of global properties before machine_init(), Igor Mammedov, 2017/09/04
[Qemu-devel] [PATCH 5/6] pc: use generic cpu_model parsing, Igor Mammedov, 2017/09/04