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[RFC PATCH v2 08/11] config/target: Implement per-binary TargetInfo structure (ARM)

Philippe Mathieu-Daudé posted 11 patches 9 months, 3 weeks ago
There is a newer version of this series
[RFC PATCH v2 08/11] config/target: Implement per-binary TargetInfo structure (ARM)
Posted by Philippe Mathieu-Daudé 9 months, 3 weeks ago 
If a file defining the binary TargetInfo structure is available,
link with it. Otherwise keep using the stub. Implement such
structure for arm-softmmu.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 meson.build                   |  7 ++++++-
 configs/targets/arm-softmmu.c | 22 ++++++++++++++++++++++
 2 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 configs/targets/arm-softmmu.c

diff --git a/meson.build b/meson.build
index 168b07b5887..da24cc2ba41 100644
--- a/meson.build
+++ b/meson.build
@@ -3809,7 +3809,6 @@ specific_ss.add(files('page-target.c', 'page-vary-target.c'))
 
 common_ss.add(files('target_info.c'))
 system_ss.add(files('target_info-qom.c'))
-specific_ss.add(files('target_info-stub.c'))
 
 subdir('backends')
 subdir('disas')
@@ -4272,6 +4271,12 @@ foreach target : target_dirs
     arch_srcs += gdbstub_xml
   endif
 
+  target_info_c = meson.project_source_root() / 'configs' / 'targets' / target + '.c'
+  if not fs.exists(target_info_c)
+    target_info_c = meson.project_source_root() / 'target_info-stub.c'
+  endif
+  arch_srcs += target_info_c
+
   t = target_arch[target_base_arch].apply(config_target, strict: false)
   arch_srcs += t.sources()
   arch_deps += t.dependencies()
diff --git a/configs/targets/arm-softmmu.c b/configs/targets/arm-softmmu.c
new file mode 100644
index 00000000000..6263d604f19
--- /dev/null
+++ b/configs/targets/arm-softmmu.c
@@ -0,0 +1,22 @@
+/*
+ * QEMU binary/target API (qemu-system-arm)
+ *
+ *  Copyright (c) Linaro
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/target_info-impl.h"
+#include "qemu/target_info-qom.h"
+#include "cpu-qom.h"
+
+static const TargetInfo target_info_arm_system = {
+    .name = "arm",
+    .machine_typename = TYPE_TARGET_ARM_MACHINE,
+};
+
+const TargetInfo *target_info(void)
+{
+    return &target_info_arm_system;
+}
-- 
2.47.1
Re: [RFC PATCH v2 08/11] config/target: Implement per-binary TargetInfo structure (ARM)
Posted by Pierrick Bouvier 9 months, 3 weeks ago 
On 4/17/25 17:50, Philippe Mathieu-Daudé wrote:
> If a file defining the binary TargetInfo structure is available,
> link with it. Otherwise keep using the stub. Implement such
> structure for arm-softmmu.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   meson.build                   |  7 ++++++-
>   configs/targets/arm-softmmu.c | 22 ++++++++++++++++++++++
>   2 files changed, 28 insertions(+), 1 deletion(-)
>   create mode 100644 configs/targets/arm-softmmu.c
> 
> diff --git a/meson.build b/meson.build
> index 168b07b5887..da24cc2ba41 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -3809,7 +3809,6 @@ specific_ss.add(files('page-target.c', 'page-vary-target.c'))
>   
>   common_ss.add(files('target_info.c'))
>   system_ss.add(files('target_info-qom.c'))
> -specific_ss.add(files('target_info-stub.c'))
>   
>   subdir('backends')
>   subdir('disas')
> @@ -4272,6 +4271,12 @@ foreach target : target_dirs
>       arch_srcs += gdbstub_xml
>     endif
>   
> +  target_info_c = meson.project_source_root() / 'configs' / 'targets' / target + '.c'
> +  if not fs.exists(target_info_c)
> +    target_info_c = meson.project_source_root() / 'target_info-stub.c'
> +  endif
> +  arch_srcs += target_info_c
> +
>     t = target_arch[target_base_arch].apply(config_target, strict: false)
>     arch_srcs += t.sources()
>     arch_deps += t.dependencies()

While this works, it would be better with a dictionary, so it follows 
the style of existing meson.build.

As well, two advantages:
- we can move configs somewhere else in case we decide to split them in 
every folder later
- We avoid calling fs.exists for every target, but it should not really 
change anything to configure step time.

---

diff --git a/meson.build b/meson.build
index 81afa63853e..7fca3c5c4dc 100644
--- a/meson.build
+++ b/meson.build
@@ -3228,6 +3228,7 @@ config_devices_mak_list = []
  config_devices_h = {}
  config_target_h = {}
  config_target_mak = {}
+target_info = {}

  disassemblers = {
    'alpha' : ['CONFIG_ALPHA_DIS'],
@@ -3823,9 +3824,9 @@ specific_ss.add(files('page-target.c', 
'page-vary-target.c'))

  common_ss.add(files('target_info.c'))
  system_ss.add(files('target_info-qom.c'))
-specific_ss.add(files('target_info-stub.c'))

  subdir('backends')
+subdir('configs/targets')
  subdir('disas')
  subdir('migration')
  subdir('monitor')
@@ -4286,6 +4287,12 @@ foreach target : target_dirs
      arch_srcs += gdbstub_xml
    endif

+  if target in target_info
+    arch_srcs += target_info[target]
+  else
+    arch_srcs += files('target_info-stub.c')
+  endif
+
    t = target_arch[target_base_arch].apply(config_target, strict: false)
    arch_srcs += t.sources()
    arch_deps += t.dependencies()

diff --git a/configs/targets/meson.build b/configs/targets/meson.build
new file mode 100644
index 00000000000..140386e932c
--- /dev/null
+++ b/configs/targets/meson.build
@@ -0,0 +1,3 @@
+foreach target : ['arm-softmmu', 'aarch64-softmmu']
+  target_info += {target : files(target + '.c')}
+endforeach
Re: [RFC PATCH v2 08/11] config/target: Implement per-binary TargetInfo structure (ARM)
Posted by Philippe Mathieu-Daudé 9 months, 3 weeks ago 
On 18/4/25 06:02, Pierrick Bouvier wrote:
> On 4/17/25 17:50, Philippe Mathieu-Daudé wrote:
>> If a file defining the binary TargetInfo structure is available,
>> link with it. Otherwise keep using the stub. Implement such
>> structure for arm-softmmu.
>>
>> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>> ---
>>   meson.build                   |  7 ++++++-
>>   configs/targets/arm-softmmu.c | 22 ++++++++++++++++++++++
>>   2 files changed, 28 insertions(+), 1 deletion(-)
>>   create mode 100644 configs/targets/arm-softmmu.c
>>
>> diff --git a/meson.build b/meson.build
>> index 168b07b5887..da24cc2ba41 100644
>> --- a/meson.build
>> +++ b/meson.build
>> @@ -3809,7 +3809,6 @@ specific_ss.add(files('page-target.c', 'page- 
>> vary-target.c'))
>>   common_ss.add(files('target_info.c'))
>>   system_ss.add(files('target_info-qom.c'))
>> -specific_ss.add(files('target_info-stub.c'))
>>   subdir('backends')
>>   subdir('disas')
>> @@ -4272,6 +4271,12 @@ foreach target : target_dirs
>>       arch_srcs += gdbstub_xml
>>     endif
>> +  target_info_c = meson.project_source_root() / 'configs' / 
>> 'targets' / target + '.c'
>> +  if not fs.exists(target_info_c)
>> +    target_info_c = meson.project_source_root() / 'target_info-stub.c'
>> +  endif
>> +  arch_srcs += target_info_c
>> +
>>     t = target_arch[target_base_arch].apply(config_target, strict: false)
>>     arch_srcs += t.sources()
>>     arch_deps += t.dependencies()
> 
> While this works, it would be better with a dictionary, so it follows 
> the style of existing meson.build.
> 
> As well, two advantages:
> - we can move configs somewhere else in case we decide to split them in 
> every folder later
> - We avoid calling fs.exists for every target, but it should not really 
> change anything to configure step time.
> 
> ---
> 
> diff --git a/meson.build b/meson.build
> index 81afa63853e..7fca3c5c4dc 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -3228,6 +3228,7 @@ config_devices_mak_list = []
>   config_devices_h = {}
>   config_target_h = {}
>   config_target_mak = {}
> +target_info = {}
> 
>   disassemblers = {
>     'alpha' : ['CONFIG_ALPHA_DIS'],
> @@ -3823,9 +3824,9 @@ specific_ss.add(files('page-target.c', 'page-vary- 
> target.c'))
> 
>   common_ss.add(files('target_info.c'))
>   system_ss.add(files('target_info-qom.c'))
> -specific_ss.add(files('target_info-stub.c'))
> 
>   subdir('backends')
> +subdir('configs/targets')
>   subdir('disas')
>   subdir('migration')
>   subdir('monitor')
> @@ -4286,6 +4287,12 @@ foreach target : target_dirs
>       arch_srcs += gdbstub_xml
>     endif
> 
> +  if target in target_info
> +    arch_srcs += target_info[target]
> +  else
> +    arch_srcs += files('target_info-stub.c')
> +  endif
> +
>     t = target_arch[target_base_arch].apply(config_target, strict: false)
>     arch_srcs += t.sources()
>     arch_deps += t.dependencies()
> 
> diff --git a/configs/targets/meson.build b/configs/targets/meson.build
> new file mode 100644
> index 00000000000..140386e932c
> --- /dev/null
> +++ b/configs/targets/meson.build
> @@ -0,0 +1,3 @@
> +foreach target : ['arm-softmmu', 'aarch64-softmmu']
> +  target_info += {target : files(target + '.c')}
> +endforeach
> 

Thanks for showing the dictionary variant!
Re: [RFC PATCH v2 08/11] config/target: Implement per-binary TargetInfo structure (ARM)
Posted by Pierrick Bouvier 9 months, 3 weeks ago 
On 4/17/25 17:50, Philippe Mathieu-Daudé wrote:
> If a file defining the binary TargetInfo structure is available,
> link with it. Otherwise keep using the stub. Implement such
> structure for arm-softmmu.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   meson.build                   |  7 ++++++-
>   configs/targets/arm-softmmu.c | 22 ++++++++++++++++++++++
>   2 files changed, 28 insertions(+), 1 deletion(-)
>   create mode 100644 configs/targets/arm-softmmu.c
> 
> diff --git a/meson.build b/meson.build
> index 168b07b5887..da24cc2ba41 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -3809,7 +3809,6 @@ specific_ss.add(files('page-target.c', 'page-vary-target.c'))
>   
>   common_ss.add(files('target_info.c'))
>   system_ss.add(files('target_info-qom.c'))
> -specific_ss.add(files('target_info-stub.c'))
>   
>   subdir('backends')
>   subdir('disas')
> @@ -4272,6 +4271,12 @@ foreach target : target_dirs
>       arch_srcs += gdbstub_xml
>     endif
>   
> +  target_info_c = meson.project_source_root() / 'configs' / 'targets' / target + '.c'
> +  if not fs.exists(target_info_c)
> +    target_info_c = meson.project_source_root() / 'target_info-stub.c'
> +  endif
> +  arch_srcs += target_info_c
> +
>     t = target_arch[target_base_arch].apply(config_target, strict: false)
>     arch_srcs += t.sources()
>     arch_deps += t.dependencies()
> diff --git a/configs/targets/arm-softmmu.c b/configs/targets/arm-softmmu.c
> new file mode 100644
> index 00000000000..6263d604f19
> --- /dev/null
> +++ b/configs/targets/arm-softmmu.c
> @@ -0,0 +1,22 @@
> +/*
> + * QEMU binary/target API (qemu-system-arm)
> + *
> + *  Copyright (c) Linaro
> + *
> + * SPDX-License-Identifier: GPL-2.0-or-later
> + */
> +
> +#include "qemu/osdep.h"
> +#include "qemu/target_info-impl.h"
> +#include "qemu/target_info-qom.h"
> +#include "cpu-qom.h"
> +
> +static const TargetInfo target_info_arm_system = {
> +    .name = "arm",
> +    .machine_typename = TYPE_TARGET_ARM_MACHINE,
> +};
> +
> +const TargetInfo *target_info(void)
> +{
> +    return &target_info_arm_system;
> +}

You can extract this from this commit, and squash with aarch64 target.
I think it's a good idea to store this in configs/targets.

Patchew 2.1-devel-b67e4c2

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