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[PATCH v4 2/2] target: Add system emulation aiming to target any archite
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From: |
Philippe Mathieu-Daudé |
|
Subject: |
[PATCH v4 2/2] target: Add system emulation aiming to target any architecture |
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Date: |
Tue, 5 Mar 2024 23:09:38 +0100 |
From: Philippe Mathieu-Daudé <f4bug@amsat.org>
Add the 'any'-architecture target.
- Only consider 64-bit targets
- Do not use any hardware accelerator (except qtest)
- For architecture constants, use:
. max of supported targets phys/virt address space
. max of supported targets MMU modes
. min of supported targets variable page bits
Since this is an experiment, the binary is named
'x-qemu-system-🚧', and won't be installed.
Build as:
$ ../configure --target-list=any-softmmu \
--disable-hvf \
--disable-kvm \
--disable-nvmm \
--disable-tcg \
--disable-whpx \
--disable-xen \
--enable-experimental-system-binary-that-may-break-dont-do-this-distros
Test as:
$ ./x-qemu-system-🚧 -M none,accel=qtest -monitor stdio
QEMU 6.2.50 monitor - type 'help' for more information
(qemu) info mtree
address-space: I/O
0000000000000000-000000000000ffff (prio 0, i/o): io
address-space: memory
0000000000000000-ffffffffffffffff (prio 0, i/o): system
(qemu) info qom-tree
/machine (none-machine)
/peripheral (container)
/peripheral-anon (container)
/unattached (container)
/io[0] (memory-region)
/sysbus (System)
/system[0] (memory-region)
(qemu) info qtree
bus: main-system-bus
type System
(qemu) info cpus
(qemu)
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
configure | 6 ++++++
configs/devices/any-softmmu/default.mak | 9 +++++++++
configs/targets/any-softmmu.mak | 3 +++
meson.build | 15 +++++++++++----
qapi/machine.json | 2 +-
include/sysemu/arch_init.h | 1 +
target/any/cpu-param.h | 13 +++++++++++++
target/any/cpu-qom.h | 12 ++++++++++++
target/any/cpu.h | 24 ++++++++++++++++++++++++
.gitlab-ci.d/buildtest.yml | 21 +++++++++++++++++++++
hw/any/meson.build | 5 +++++
hw/meson.build | 1 +
meson_options.txt | 3 +++
scripts/meson-buildoptions.sh | 5 +++++
target/Kconfig | 1 +
target/any/Kconfig | 4 ++++
target/any/meson.build | 7 +++++++
target/meson.build | 1 +
tests/qtest/meson.build | 6 +++++-
19 files changed, 133 insertions(+), 6 deletions(-)
create mode 100644 configs/devices/any-softmmu/default.mak
create mode 100644 configs/targets/any-softmmu.mak
create mode 100644 target/any/cpu-param.h
create mode 100644 target/any/cpu-qom.h
create mode 100644 target/any/cpu.h
create mode 100644 hw/any/meson.build
create mode 100644 target/any/Kconfig
create mode 100644 target/any/meson.build
diff --git a/configure b/configure
index 3cd736b139..57f6c7038b 100755
--- a/configure
+++ b/configure
@@ -194,6 +194,7 @@ EXTRA_LDFLAGS=""
# Distributions want to ensure that several features are compiled in, and it
# is impossible without a --enable-foo that exits if a feature is not found.
default_feature=""
+target_system_any=""
for opt do
optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)')
@@ -693,6 +694,8 @@ for opt do
;;
--without-default-features) # processed above
;;
+ --enable-experimental-system-binary-that-may-break-dont-do-this-distros)
target_system_any="yes"
+ ;;
--static) static="yes"
;;
--host=*|--build=*|\
@@ -834,6 +837,9 @@ fi
for config in $mak_wilds; do
target="$(basename "$config" .mak)"
+ if [ "$target" = any-softmmu ] && [ "$target_system_any" != yes ]; then
+ continue
+ fi
if echo "$target_list_exclude" | grep -vq "$target"; then
default_target_list="${default_target_list} $target"
fi
diff --git a/configs/devices/any-softmmu/default.mak
b/configs/devices/any-softmmu/default.mak
new file mode 100644
index 0000000000..dab0ce770e
--- /dev/null
+++ b/configs/devices/any-softmmu/default.mak
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+CONFIG_ISA_BUS=y
+CONFIG_PCI=y
+CONFIG_PCI_DEVICES=y
+CONFIG_I2C=y
+CONFIG_TPM=y
+CONFIG_NUBUS=y
+CONFIG_VIRTIO=y
diff --git a/configs/targets/any-softmmu.mak b/configs/targets/any-softmmu.mak
new file mode 100644
index 0000000000..2c6cf1edd4
--- /dev/null
+++ b/configs/targets/any-softmmu.mak
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+TARGET_ARCH=any
diff --git a/meson.build b/meson.build
index 51b995f4c7..a4fe9f23d0 100644
--- a/meson.build
+++ b/meson.build
@@ -3051,7 +3051,9 @@ foreach target : target_dirs
if default_targets
continue
endif
- error('No accelerator available for target @0@'.format(target))
+ if 'any-softmmu' not in target_dirs
+ error('No accelerator available for target @0@'.format(target))
+ endif
endif
actual_target_dirs += target
@@ -3909,16 +3911,21 @@ foreach target : target_dirs
name_suffix: 'fa')
if target.endswith('-softmmu')
+ if target_name == 'any'
+ qemu_system_name = 'x-qemu-system-🚧'
+ else
+ qemu_system_name = 'qemu-system-' + target_name
+ endif
execs = [{
- 'name': 'qemu-system-' + target_name,
+ 'name': qemu_system_name,
'win_subsystem': 'console',
'sources': files('system/main.c'),
'dependencies': [],
- 'install': true
+ 'install': target_name != 'any'
}]
if host_os == 'windows' and (sdl.found() or gtk.found())
execs += [{
- 'name': 'qemu-system-' + target_name + 'w',
+ 'name': qemu_system_name + 'w',
'win_subsystem': 'windows',
'sources': files('system/main.c'),
'dependencies': [],
diff --git a/qapi/machine.json b/qapi/machine.json
index bb5a178909..970aac2364 100644
--- a/qapi/machine.json
+++ b/qapi/machine.json
@@ -36,7 +36,7 @@
'mips64el', 'mipsel', 'nios2', 'or1k', 'ppc',
'ppc64', 'riscv32', 'riscv64', 'rx', 's390x', 'sh4',
'sh4eb', 'sparc', 'sparc64', 'tricore',
- 'x86_64', 'xtensa', 'xtensaeb' ] }
+ 'x86_64', 'xtensa', 'xtensaeb', 'any' ] }
##
# @CpuS390State:
diff --git a/include/sysemu/arch_init.h b/include/sysemu/arch_init.h
index 8850cb1a14..49bee75610 100644
--- a/include/sysemu/arch_init.h
+++ b/include/sysemu/arch_init.h
@@ -4,6 +4,7 @@
enum {
QEMU_ARCH_ALL = -1,
+ QEMU_ARCH_ANY = -1,
QEMU_ARCH_ALPHA = (1 << 0),
QEMU_ARCH_ARM = (1 << 1),
QEMU_ARCH_CRIS = (1 << 2),
diff --git a/target/any/cpu-param.h b/target/any/cpu-param.h
new file mode 100644
index 0000000000..42e38ae991
--- /dev/null
+++ b/target/any/cpu-param.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef ANY_CPU_PARAM_H
+#define ANY_CPU_PARAM_H
+
+#define TARGET_LONG_BITS 64
+
+#define TARGET_PHYS_ADDR_SPACE_BITS 64 /* MAX(targets) */
+#define TARGET_VIRT_ADDR_SPACE_BITS 64 /* MAX(targets) */
+
+#define TARGET_PAGE_BITS_VARY
+#define TARGET_PAGE_BITS_MIN 10 /* MIN(targets)=ARMv5/ARMv6, ignoring AVR */
+
+#endif
diff --git a/target/any/cpu-qom.h b/target/any/cpu-qom.h
new file mode 100644
index 0000000000..18d6a85de9
--- /dev/null
+++ b/target/any/cpu-qom.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef QEMU_DUMMY_CPU_QOM_H
+#define QEMU_DUMMY_CPU_QOM_H
+
+#include "hw/core/cpu.h"
+#include "qom/object.h"
+
+#define TYPE_DUMMY_CPU "dummy-cpu"
+
+OBJECT_DECLARE_CPU_TYPE(DUMMYCPU, CPUClass, DUMMY_CPU)
+
+#endif
diff --git a/target/any/cpu.h b/target/any/cpu.h
new file mode 100644
index 0000000000..e8abb8891f
--- /dev/null
+++ b/target/any/cpu.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef TARGET_ANY_CPU_H
+#define TARGET_ANY_CPU_H
+
+#include "cpu-qom.h"
+#include "exec/cpu-defs.h"
+
+#define DUMMY_CPU_TYPE_SUFFIX "-" TYPE_DUMMY_CPU
+#define DUMMY_CPU_TYPE_NAME(name) (name DUMMY_CPU_TYPE_SUFFIX)
+#define CPU_RESOLVING_TYPE TYPE_DUMMY_CPU
+
+struct CPUArchState {
+ /* nothing here */
+};
+
+struct ArchCPU {
+ CPUState parent_obj;
+
+ CPUArchState env;
+};
+
+#include "exec/cpu-all.h" /* FIXME remove once exec/ headers cleaned */
+
+#endif
diff --git a/.gitlab-ci.d/buildtest.yml b/.gitlab-ci.d/buildtest.yml
index a1c030337b..493a868bfc 100644
--- a/.gitlab-ci.d/buildtest.yml
+++ b/.gitlab-ci.d/buildtest.yml
@@ -729,3 +729,24 @@ pages:
- public
variables:
QEMU_JOB_PUBLISH: 1
+
+build-system-any:
+ extends:
+ - .native_build_job_template
+ needs:
+ - job: amd64-alpine-container
+ variables:
+ IMAGE: alpine
+ TARGETS: any-softmmu
+ MAKE_CHECK_ARGS: check-qtest
+ CONFIGURE_ARGS:
+ --disable-tools
+ --disable-hvf
+ --disable-kvm
+ --disable-nvmm
+ --disable-tcg
+ --disable-whpx
+ --disable-xen
+ --with-default-devices
+ --enable-qom-cast-debug
+ --enable-experimental-system-binary-that-may-break-dont-do-this-distros
diff --git a/hw/any/meson.build b/hw/any/meson.build
new file mode 100644
index 0000000000..60e1567e53
--- /dev/null
+++ b/hw/any/meson.build
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+any_ss = ss.source_set()
+
+hw_arch += {'any': any_ss}
diff --git a/hw/meson.build b/hw/meson.build
index 463d702683..644eeee938 100644
--- a/hw/meson.build
+++ b/hw/meson.build
@@ -47,6 +47,7 @@ subdir('xenpv')
subdir('fsi')
subdir('alpha')
+subdir('any')
subdir('arm')
subdir('avr')
subdir('cris')
diff --git a/meson_options.txt b/meson_options.txt
index 0a99a059ec..afae66ad1c 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -368,3 +368,6 @@ option('qemu_ga_version', type: 'string', value: '',
option('hexagon_idef_parser', type : 'boolean', value : true,
description: 'use idef-parser to automatically generate TCG code for
the Hexagon frontend')
+
+option('experimental-system-binary-that-may-break-dont-do-this-distros', type
: 'boolean', value : false,
+ description: 'build experimental qemu-system-any binary with no
particular target architecture')
diff --git a/scripts/meson-buildoptions.sh b/scripts/meson-buildoptions.sh
index 680fa3f581..85f5aec267 100644
--- a/scripts/meson-buildoptions.sh
+++ b/scripts/meson-buildoptions.sh
@@ -32,6 +32,9 @@ meson_options_help() {
printf "%s\n" ' --enable-debug-stack-usage'
printf "%s\n" ' measure coroutine stack usage'
printf "%s\n" ' --enable-debug-tcg TCG debugging'
+ printf "%s\n" '
--enable-experimental-system-binary-that-may-break-dont-do-this-distros'
+ printf "%s\n" ' build experimental qemu-system-any
binary with no'
+ printf "%s\n" ' particular target architecture'
printf "%s\n" ' --enable-fdt[=CHOICE] Whether and how to find the libfdt
library'
printf "%s\n" ' (choices:
auto/disabled/enabled/internal/system)'
printf "%s\n" ' --enable-fuzzing build fuzzing targets'
@@ -306,6 +309,8 @@ _meson_option_parse() {
--disable-docs) printf "%s" -Ddocs=disabled ;;
--enable-dsound) printf "%s" -Ddsound=enabled ;;
--disable-dsound) printf "%s" -Ddsound=disabled ;;
+ --enable-experimental-system-binary-that-may-break-dont-do-this-distros)
printf "%s"
-Dexperimental-system-binary-that-may-break-dont-do-this-distros=true ;;
+ --disable-experimental-system-binary-that-may-break-dont-do-this-distros)
printf "%s"
-Dexperimental-system-binary-that-may-break-dont-do-this-distros=false ;;
--enable-fdt) printf "%s" -Dfdt=enabled ;;
--disable-fdt) printf "%s" -Dfdt=disabled ;;
--enable-fdt=*) quote_sh "-Dfdt=$2" ;;
diff --git a/target/Kconfig b/target/Kconfig
index 83da0bd293..09109c4884 100644
--- a/target/Kconfig
+++ b/target/Kconfig
@@ -1,4 +1,5 @@
source alpha/Kconfig
+source any/Kconfig
source arm/Kconfig
source avr/Kconfig
source cris/Kconfig
diff --git a/target/any/Kconfig b/target/any/Kconfig
new file mode 100644
index 0000000000..8840d70e55
--- /dev/null
+++ b/target/any/Kconfig
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+config ANY
+ bool
diff --git a/target/any/meson.build b/target/any/meson.build
new file mode 100644
index 0000000000..4f5422d3a3
--- /dev/null
+++ b/target/any/meson.build
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+any_ss = ss.source_set()
+any_system_ss = ss.source_set()
+
+target_arch += {'any': any_ss}
+target_system_arch += {'any': any_system_ss}
diff --git a/target/meson.build b/target/meson.build
index dee2ac47e0..c75b91e1b9 100644
--- a/target/meson.build
+++ b/target/meson.build
@@ -1,4 +1,5 @@
subdir('alpha')
+subdir('any')
subdir('arm')
subdir('avr')
subdir('cris')
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 6ea77893f5..e302d4153e 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -355,7 +355,11 @@ foreach dir : target_dirs
endif
target_base = dir.split('-')[0]
- qtest_emulator = emulators['qemu-system-' + target_base]
+ if target_base == 'any'
+ qtest_emulator = emulators['x-qemu-system-🚧']
+ else
+ qtest_emulator = emulators['qemu-system-' + target_base]
+ endif
target_qtests = get_variable('qtests_' + target_base, []) + qtests_generic
test_deps = roms
--
2.41.0