diff mbox series

[RFC,PATCH-for-10.1,04/19] qemu: Convert target_words_bigendian() to TargetInfo API

Message ID 20250403234914.9154-5-philmd@linaro.org
State New
Headers show
Series qemu: Introduce TargetInfo API (for single binary) | expand

Commit Message

Philippe Mathieu-Daudé April 3, 2025, 11:48 p.m. UTC 
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/exec/tswap.h            | 13 +------------
 include/qemu/target_info-impl.h |  4 ++++
 include/qemu/target_info.h      | 11 +++++++++++
 cpu-target.c                    |  6 ------
 hw/core/cpu-system.c            |  2 +-
 hw/display/vga.c                |  2 +-
 hw/virtio/virtio.c              |  2 +-
 system/qtest.c                  |  1 +
 target_info-stub.c              |  1 +
 target_info.c                   |  5 +++++
 10 files changed, 26 insertions(+), 21 deletions(-)

Comments

Pierrick Bouvier April 4, 2025, 4:45 p.m. UTC | #1 
On 4/3/25 16:48, Philippe Mathieu-Daudé wrote:
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   include/exec/tswap.h            | 13 +------------
>   include/qemu/target_info-impl.h |  4 ++++
>   include/qemu/target_info.h      | 11 +++++++++++
>   cpu-target.c                    |  6 ------
>   hw/core/cpu-system.c            |  2 +-
>   hw/display/vga.c                |  2 +-
>   hw/virtio/virtio.c              |  2 +-
>   system/qtest.c                  |  1 +
>   target_info-stub.c              |  1 +
>   target_info.c                   |  5 +++++
>   10 files changed, 26 insertions(+), 21 deletions(-)
> 
> diff --git a/include/exec/tswap.h b/include/exec/tswap.h
> index 84060a49994..415781b2bcc 100644
> --- a/include/exec/tswap.h
> +++ b/include/exec/tswap.h
> @@ -9,18 +9,7 @@
>   #define TSWAP_H
>   
>   #include "qemu/bswap.h"
> -
> -/**
> - * target_words_bigendian:
> - * Returns true if the (default) endianness of the target is big endian,
> - * false otherwise. Common code should normally never need to know about the
> - * endianness of the target, so please do *not* use this function unless you
> - * know very well what you are doing!
> - */
> -bool target_words_bigendian(void);
> -#ifdef COMPILING_PER_TARGET
> -#define target_words_bigendian()  TARGET_BIG_ENDIAN
> -#endif
> +#include "qemu/target_info.h"
>   
>   /*
>    * If we're in target-specific code, we can hard-code the swapping
> diff --git a/include/qemu/target_info-impl.h b/include/qemu/target_info-impl.h
> index 0cec211e362..14566e4a913 100644
> --- a/include/qemu/target_info-impl.h
> +++ b/include/qemu/target_info-impl.h
> @@ -10,6 +10,7 @@
>   #define QEMU_TARGET_INFO_IMPL_H
>   
>   #include "qemu/target_info.h"
> +#include "qapi/qapi-types-common.h"
>   #include "qapi/qapi-types-machine.h"
>   
>   struct BinaryTargetInfo {
> @@ -23,6 +24,9 @@ struct BinaryTargetInfo {
>       /* related to TARGET_ARCH definition */
>       SysEmuTarget system_arch;
>   
> +    /* related to TARGET_BIG_ENDIAN definition */
> +    EndianMode endianness;
> +
>   };
>   
>   #endif
> diff --git a/include/qemu/target_info.h b/include/qemu/target_info.h
> index 6ca36dae8a3..e84f16d1034 100644
> --- a/include/qemu/target_info.h
> +++ b/include/qemu/target_info.h
> @@ -21,4 +21,15 @@ const char *target_name(void);
>   
>   SysEmuTarget target_system_arch(void);
>   
> +/**
> + * target_words_bigendian:
> + * Returns true if the (default) endianness of the target is big endian,
> + * false otherwise. Note that in target-specific code, you can use
> + * TARGET_BIG_ENDIAN directly instead. On the other hand, common
> + * code should normally never need to know about the endianness of the
> + * target, so please do *not* use this function unless you know very well
> + * what you are doing!
> + */
> +bool target_words_bigendian(void);
> +

We don't want to reintroduce TARGET_BIG_ENDIAN in the comment, it was 
purposefully removed previously.

>   #endif
> diff --git a/cpu-target.c b/cpu-target.c
> index 3f82d3ea444..761c2d28645 100644
> --- a/cpu-target.c
> +++ b/cpu-target.c
> @@ -159,9 +159,3 @@ void cpu_abort(CPUState *cpu, const char *fmt, ...)
>   #endif
>       abort();
>   }
> -
> -#undef target_words_bigendian
> -bool target_words_bigendian(void)
> -{
> -    return TARGET_BIG_ENDIAN;
> -}
> diff --git a/hw/core/cpu-system.c b/hw/core/cpu-system.c
> index 82b68b8927d..32700c49b43 100644
> --- a/hw/core/cpu-system.c
> +++ b/hw/core/cpu-system.c
> @@ -24,7 +24,7 @@
>   #include "exec/cputlb.h"
>   #include "system/memory.h"
>   #include "exec/tb-flush.h"
> -#include "exec/tswap.h"
> +#include "qemu/target_info.h"
>   #include "hw/qdev-core.h"
>   #include "hw/qdev-properties.h"
>   #include "hw/core/sysemu-cpu-ops.h"
> diff --git a/hw/display/vga.c b/hw/display/vga.c
> index b01f67c65fb..1883e03d3d8 100644
> --- a/hw/display/vga.c
> +++ b/hw/display/vga.c
> @@ -26,7 +26,7 @@
>   #include "qemu/units.h"
>   #include "system/reset.h"
>   #include "qapi/error.h"
> -#include "exec/tswap.h"
> +#include "qemu/target_info.h"
>   #include "hw/display/vga.h"
>   #include "hw/i386/x86.h"
>   #include "hw/pci/pci.h"
> diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
> index 85110bce374..4ef56c183b2 100644
> --- a/hw/virtio/virtio.c
> +++ b/hw/virtio/virtio.c
> @@ -20,7 +20,7 @@
>   #include "qemu/log.h"
>   #include "qemu/main-loop.h"
>   #include "qemu/module.h"
> -#include "exec/tswap.h"
> +#include "qemu/target_info.h"
>   #include "qom/object_interfaces.h"
>   #include "hw/core/cpu.h"
>   #include "hw/virtio/virtio.h"
> diff --git a/system/qtest.c b/system/qtest.c
> index 523a0479959..6146a7bfdc0 100644
> --- a/system/qtest.c
> +++ b/system/qtest.c
> @@ -29,6 +29,7 @@
>   #include "qemu/error-report.h"
>   #include "qemu/module.h"
>   #include "qemu/cutils.h"
> +#include "qemu/target_info.h"
>   #include "qom/object_interfaces.h"
>   
>   #define MAX_IRQ 256
> diff --git a/target_info-stub.c b/target_info-stub.c
> index 46a240ac66a..c1a15f5cc12 100644
> --- a/target_info-stub.c
> +++ b/target_info-stub.c
> @@ -15,6 +15,7 @@ static const BinaryTargetInfo target_info_stub = {
>       .is_stub = true,
>       .name = TARGET_NAME,
>       .system_arch = -1,
> +    .endianness = TARGET_BIG_ENDIAN ? ENDIAN_MODE_BIG : ENDIAN_MODE_LITTLE,
>   };
>   
>   const BinaryTargetInfo *target_info(void)
> diff --git a/target_info.c b/target_info.c
> index be4f19009b3..22796dda543 100644
> --- a/target_info.c
> +++ b/target_info.c
> @@ -31,3 +31,8 @@ SysEmuTarget target_system_arch(void)
>       }
>       return system_arch;
>   }
> +
> +bool target_words_bigendian(void)
> +{
> +    return target_info()->endianness == ENDIAN_MODE_BIG;
> +}

With the comment update,
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
diff mbox series

Patch

diff --git a/include/exec/tswap.h b/include/exec/tswap.h
index 84060a49994..415781b2bcc 100644
--- a/include/exec/tswap.h
+++ b/include/exec/tswap.h
@@ -9,18 +9,7 @@ 
 #define TSWAP_H
 
 #include "qemu/bswap.h"
-
-/**
- * target_words_bigendian:
- * Returns true if the (default) endianness of the target is big endian,
- * false otherwise. Common code should normally never need to know about the
- * endianness of the target, so please do *not* use this function unless you
- * know very well what you are doing!
- */
-bool target_words_bigendian(void);
-#ifdef COMPILING_PER_TARGET
-#define target_words_bigendian()  TARGET_BIG_ENDIAN
-#endif
+#include "qemu/target_info.h"
 
 /*
  * If we're in target-specific code, we can hard-code the swapping
diff --git a/include/qemu/target_info-impl.h b/include/qemu/target_info-impl.h
index 0cec211e362..14566e4a913 100644
--- a/include/qemu/target_info-impl.h
+++ b/include/qemu/target_info-impl.h
@@ -10,6 +10,7 @@ 
 #define QEMU_TARGET_INFO_IMPL_H
 
 #include "qemu/target_info.h"
+#include "qapi/qapi-types-common.h"
 #include "qapi/qapi-types-machine.h"
 
 struct BinaryTargetInfo {
@@ -23,6 +24,9 @@  struct BinaryTargetInfo {
     /* related to TARGET_ARCH definition */
     SysEmuTarget system_arch;
 
+    /* related to TARGET_BIG_ENDIAN definition */
+    EndianMode endianness;
+
 };
 
 #endif
diff --git a/include/qemu/target_info.h b/include/qemu/target_info.h
index 6ca36dae8a3..e84f16d1034 100644
--- a/include/qemu/target_info.h
+++ b/include/qemu/target_info.h
@@ -21,4 +21,15 @@  const char *target_name(void);
 
 SysEmuTarget target_system_arch(void);
 
+/**
+ * target_words_bigendian:
+ * Returns true if the (default) endianness of the target is big endian,
+ * false otherwise. Note that in target-specific code, you can use
+ * TARGET_BIG_ENDIAN directly instead. On the other hand, common
+ * code should normally never need to know about the endianness of the
+ * target, so please do *not* use this function unless you know very well
+ * what you are doing!
+ */
+bool target_words_bigendian(void);
+
 #endif
diff --git a/cpu-target.c b/cpu-target.c
index 3f82d3ea444..761c2d28645 100644
--- a/cpu-target.c
+++ b/cpu-target.c
@@ -159,9 +159,3 @@  void cpu_abort(CPUState *cpu, const char *fmt, ...)
 #endif
     abort();
 }
-
-#undef target_words_bigendian
-bool target_words_bigendian(void)
-{
-    return TARGET_BIG_ENDIAN;
-}
diff --git a/hw/core/cpu-system.c b/hw/core/cpu-system.c
index 82b68b8927d..32700c49b43 100644
--- a/hw/core/cpu-system.c
+++ b/hw/core/cpu-system.c
@@ -24,7 +24,7 @@ 
 #include "exec/cputlb.h"
 #include "system/memory.h"
 #include "exec/tb-flush.h"
-#include "exec/tswap.h"
+#include "qemu/target_info.h"
 #include "hw/qdev-core.h"
 #include "hw/qdev-properties.h"
 #include "hw/core/sysemu-cpu-ops.h"
diff --git a/hw/display/vga.c b/hw/display/vga.c
index b01f67c65fb..1883e03d3d8 100644
--- a/hw/display/vga.c
+++ b/hw/display/vga.c
@@ -26,7 +26,7 @@ 
 #include "qemu/units.h"
 #include "system/reset.h"
 #include "qapi/error.h"
-#include "exec/tswap.h"
+#include "qemu/target_info.h"
 #include "hw/display/vga.h"
 #include "hw/i386/x86.h"
 #include "hw/pci/pci.h"
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 85110bce374..4ef56c183b2 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -20,7 +20,7 @@ 
 #include "qemu/log.h"
 #include "qemu/main-loop.h"
 #include "qemu/module.h"
-#include "exec/tswap.h"
+#include "qemu/target_info.h"
 #include "qom/object_interfaces.h"
 #include "hw/core/cpu.h"
 #include "hw/virtio/virtio.h"
diff --git a/system/qtest.c b/system/qtest.c
index 523a0479959..6146a7bfdc0 100644
--- a/system/qtest.c
+++ b/system/qtest.c
@@ -29,6 +29,7 @@ 
 #include "qemu/error-report.h"
 #include "qemu/module.h"
 #include "qemu/cutils.h"
+#include "qemu/target_info.h"
 #include "qom/object_interfaces.h"
 
 #define MAX_IRQ 256
diff --git a/target_info-stub.c b/target_info-stub.c
index 46a240ac66a..c1a15f5cc12 100644
--- a/target_info-stub.c
+++ b/target_info-stub.c
@@ -15,6 +15,7 @@  static const BinaryTargetInfo target_info_stub = {
     .is_stub = true,
     .name = TARGET_NAME,
     .system_arch = -1,
+    .endianness = TARGET_BIG_ENDIAN ? ENDIAN_MODE_BIG : ENDIAN_MODE_LITTLE,
 };
 
 const BinaryTargetInfo *target_info(void)
diff --git a/target_info.c b/target_info.c
index be4f19009b3..22796dda543 100644
--- a/target_info.c
+++ b/target_info.c
@@ -31,3 +31,8 @@  SysEmuTarget target_system_arch(void)
     }
     return system_arch;
 }
+
+bool target_words_bigendian(void)
+{
+    return target_info()->endianness == ENDIAN_MODE_BIG;
+}