On Mon, Apr 22, 2024 at 04:20:56PM +0200, Philippe Mathieu-Daudé wrote:
> Since VirtIO devices can change endianness at runtime,
> we need to use the device endianness, not the target
> one.
>
> Cc: qemu-sta...@nongnu.org
> Fixes: eb9ad377bb ("virtio-sound: handle control messages and streams")
> Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
This is all completely bogus. Virtio SND is from Virtio 1.0 only.
It is unconditionally little endian.
If it's not it's a guest bug pls just fix it there.
> ---
> v2: Use virtio_is_big_endian()
> v3: Remove "hw/core/cpu.h
> ---
> hw/audio/virtio-snd.c | 9 +++++----
> 1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/hw/audio/virtio-snd.c b/hw/audio/virtio-snd.c
> index c80b58bf5d..939cd78026 100644
> --- a/hw/audio/virtio-snd.c
> +++ b/hw/audio/virtio-snd.c
> @@ -24,7 +24,6 @@
> #include "trace.h"
> #include "qapi/error.h"
> #include "hw/audio/virtio-snd.h"
> -#include "hw/core/cpu.h"
>
> #define VIRTIO_SOUND_VM_VERSION 1
> #define VIRTIO_SOUND_JACK_DEFAULT 0
> @@ -395,13 +394,15 @@ static uint32_t virtio_snd_get_qemu_freq(uint32_t rate)
> * Get QEMU Audiosystem compatible audsettings from virtio based pcm stream
> * params.
> */
> -static void virtio_snd_get_qemu_audsettings(audsettings *as,
> +static void virtio_snd_get_qemu_audsettings(VirtIOSound *s, audsettings *as,
> virtio_snd_pcm_set_params
> *params)
> {
> + VirtIODevice *vdev = VIRTIO_DEVICE(s);
> +
> as->nchannels = MIN(AUDIO_MAX_CHANNELS, params->channels);
> as->fmt = virtio_snd_get_qemu_format(params->format);
> as->freq = virtio_snd_get_qemu_freq(params->rate);
> - as->endianness = target_words_bigendian() ? 1 : 0;
> + as->endianness = virtio_is_big_endian(vdev) ? 1 : 0;
> }
>
> /*
> @@ -464,7 +465,7 @@ static uint32_t virtio_snd_pcm_prepare(VirtIOSound *s,
> uint32_t stream_id)
> s->pcm->streams[stream_id] = stream;
> }
>
> - virtio_snd_get_qemu_audsettings(&as, params);
> + virtio_snd_get_qemu_audsettings(s, &as, params);
> stream->info.direction = stream_id < s->snd_conf.streams / 2 +
> (s->snd_conf.streams & 1) ? VIRTIO_SND_D_OUTPUT : VIRTIO_SND_D_INPUT;
> stream->info.hdr.hda_fn_nid = VIRTIO_SOUND_HDA_FN_NID;
> --
> 2.41.0
