Re: [Qemu-devel] [PATCH v7 25/42] hw/misc: Declare device little or big endian

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 8/16/19 9:34 AM, tony.nguyen@bt.com wrote:
> For each device declared with DEVICE_NATIVE_ENDIAN, find the set of
> targets from the set of target/hw/*/device.o.
> 
> If the set of targets are all little or all big endian, re-declare
> the device endianness as DEVICE_LITTLE_ENDIAN or DEVICE_BIG_ENDIAN
> respectively.
> 
> This *naive* deduction may result in genuinely native endian devices
> being incorrectly declared as little or big endian, but should not
> introduce regressions for current targets.
> 
> These devices should be re-declared as DEVICE_NATIVE_ENDIAN if 1) it
> has a new target with an opposite endian or 2) someone informed knows
> better =)
> 
> Signed-off-by: Tony Nguyen <tony.nguyen@bt.com>
> ---
>  hw/misc/a9scu.c    | 2 +-
>  hw/misc/applesmc.c | 6 +++---
>  hw/misc/arm11scu.c | 2 +-
>  hw/misc/arm_l2x0.c | 2 +-
>  hw/misc/puv3_pm.c  | 2 +-
>  5 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/hw/misc/a9scu.c b/hw/misc/a9scu.c
> index 4307f00..3de8cd3 100644
> --- a/hw/misc/a9scu.c
> +++ b/hw/misc/a9scu.c
> @@ -94,7 +94,7 @@ static void a9_scu_write(void *opaque, hwaddr offset,
>  static const MemoryRegionOps a9_scu_ops = {
>      .read = a9_scu_read,
>      .write = a9_scu_write,
> -    .endianness = DEVICE_NATIVE_ENDIAN,
> +    .endianness = DEVICE_LITTLE_ENDIAN,

Uh, I doubt that.

>  };
>  
>  static void a9_scu_reset(DeviceState *dev)
> diff --git a/hw/misc/applesmc.c b/hw/misc/applesmc.c
> index 2d7eb3c..6c91f29 100644
> --- a/hw/misc/applesmc.c
> +++ b/hw/misc/applesmc.c
> @@ -285,7 +285,7 @@ static void qdev_applesmc_isa_reset(DeviceState *dev)
>  static const MemoryRegionOps applesmc_data_io_ops = {
>      .write = applesmc_io_data_write,
>      .read = applesmc_io_data_read,
> -    .endianness = DEVICE_NATIVE_ENDIAN,
> +    .endianness = DEVICE_LITTLE_ENDIAN,
>      .impl = {
>          .min_access_size = 1,
>          .max_access_size = 1,
> @@ -295,7 +295,7 @@ static const MemoryRegionOps applesmc_data_io_ops = {
>  static const MemoryRegionOps applesmc_cmd_io_ops = {
>      .write = applesmc_io_cmd_write,
>      .read = applesmc_io_cmd_read,
> -    .endianness = DEVICE_NATIVE_ENDIAN,
> +    .endianness = DEVICE_LITTLE_ENDIAN,
>      .impl = {
>          .min_access_size = 1,
>          .max_access_size = 1,
> @@ -305,7 +305,7 @@ static const MemoryRegionOps applesmc_cmd_io_ops = {
>  static const MemoryRegionOps applesmc_err_io_ops = {
>      .write = applesmc_io_err_write,
>      .read = applesmc_io_err_read,
> -    .endianness = DEVICE_NATIVE_ENDIAN,
> +    .endianness = DEVICE_LITTLE_ENDIAN,
>      .impl = {
>          .min_access_size = 1,
>          .max_access_size = 1,

Being ioport, this one might be OK.

> diff --git a/hw/misc/arm11scu.c b/hw/misc/arm11scu.c
> index 84275df..59fd7c0 100644
> --- a/hw/misc/arm11scu.c
> +++ b/hw/misc/arm11scu.c
> @@ -57,7 +57,7 @@ static void mpcore_scu_write(void *opaque, hwaddr offset,
>  static const MemoryRegionOps mpcore_scu_ops = {
>      .read = mpcore_scu_read,
>      .write = mpcore_scu_write,
> -    .endianness = DEVICE_NATIVE_ENDIAN,
> +    .endianness = DEVICE_LITTLE_ENDIAN,

I don't think so,

>  };
>  
>  static void arm11_scu_realize(DeviceState *dev, Error **errp)
> diff --git a/hw/misc/arm_l2x0.c b/hw/misc/arm_l2x0.c
> index b88f40a..72ecf46 100644
> --- a/hw/misc/arm_l2x0.c
> +++ b/hw/misc/arm_l2x0.c
> @@ -157,7 +157,7 @@ static void l2x0_priv_reset(DeviceState *dev)
>  static const MemoryRegionOps l2x0_mem_ops = {
>      .read = l2x0_priv_read,
>      .write = l2x0_priv_write,
> -    .endianness = DEVICE_NATIVE_ENDIAN,
> +    .endianness = DEVICE_LITTLE_ENDIAN,

neither here, but Peter will confirm.

>   };
>  
>  static void l2x0_priv_init(Object *obj)
> diff --git a/hw/misc/puv3_pm.c b/hw/misc/puv3_pm.c
> index b538b4a..cd82b69 100644
> --- a/hw/misc/puv3_pm.c
> +++ b/hw/misc/puv3_pm.c
> @@ -118,7 +118,7 @@ static const MemoryRegionOps puv3_pm_ops = {
>          .min_access_size = 4,
>          .max_access_size = 4,
>      },
> -    .endianness = DEVICE_NATIVE_ENDIAN,
> +    .endianness = DEVICE_LITTLE_ENDIAN,

This one I can't tell.

>  };
>  
>  static void puv3_pm_realize(DeviceState *dev, Error **errp)
> -- 
> 1.8.3.1
> 
> ​
>