Re: [PATCH] hw/xtensa: require libfdt

[Thomas Huth <thuth@redhat.com>]

On 22/01/2024 10.42, Paolo Bonzini wrote:
> Always allow -dtb in qemu-system-xtensa.  Basically all other targets require
> it if it can be used (including for example i386/x86_64).
> 
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>   configs/targets/xtensa-softmmu.mak   | 1 +
>   configs/targets/xtensaeb-softmmu.mak | 1 +
>   hw/xtensa/xtfpga.c                   | 9 ---------
>   3 files changed, 2 insertions(+), 9 deletions(-)
> 
> diff --git a/configs/targets/xtensa-softmmu.mak b/configs/targets/xtensa-softmmu.mak
> index f075557bfa9..c394df73034 100644
> --- a/configs/targets/xtensa-softmmu.mak
> +++ b/configs/targets/xtensa-softmmu.mak
> @@ -1,2 +1,3 @@
>   TARGET_ARCH=xtensa
>   TARGET_SUPPORTS_MTTCG=y
> +TARGET_NEED_FDT=y
> diff --git a/configs/targets/xtensaeb-softmmu.mak b/configs/targets/xtensaeb-softmmu.mak
> index b02e11b8200..517b4c3e12d 100644
> --- a/configs/targets/xtensaeb-softmmu.mak
> +++ b/configs/targets/xtensaeb-softmmu.mak
> @@ -1,3 +1,4 @@
>   TARGET_ARCH=xtensa
>   TARGET_BIG_ENDIAN=y
>   TARGET_SUPPORTS_MTTCG=y
> +TARGET_NEED_FDT=y
> diff --git a/hw/xtensa/xtfpga.c b/hw/xtensa/xtfpga.c
> index fbad1c83a3f..3c93cfffbaa 100644
> --- a/hw/xtensa/xtfpga.c
> +++ b/hw/xtensa/xtfpga.c
> @@ -357,7 +357,6 @@ static void xtfpga_init(const XtfpgaBoardDesc *board, MachineState *machine)
>               cur_tagptr = put_tag(cur_tagptr, BP_TAG_COMMAND_LINE,
>                                    strlen(kernel_cmdline) + 1, kernel_cmdline);
>           }
> -#ifdef CONFIG_FDT
>           if (dtb_filename) {
>               int fdt_size;
>               void *fdt = load_device_tree(dtb_filename, &fdt_size);
> @@ -374,14 +373,6 @@ static void xtfpga_init(const XtfpgaBoardDesc *board, MachineState *machine)
>               cur_lowmem = QEMU_ALIGN_UP(cur_lowmem + fdt_size, 4 * KiB);
>               g_free(fdt);
>           }
> -#else
> -        if (dtb_filename) {
> -            error_report("could not load DTB '%s': "
> -                         "FDT support is not configured in QEMU",
> -                         dtb_filename);
> -            exit(EXIT_FAILURE);
> -        }
> -#endif

Agreed, we should do this the same way on all architectures.

Reviewed-by: Thomas Huth <thuth@redhat.com>