audio ok

hc

2023-12-11 223293205a7265c8b02882461ba8996650048ade

 kernel/include/uapi/linux/virtio_config.h
..
..
@@ -67,13 +67,26 @@
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 #define VIRTIO_F_VERSION_1		32
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 /*
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- * If clear - device has the IOMMU bypass quirk feature.
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- * If set - use platform tools to detect the IOMMU.
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+ * If clear - device has the platform DMA (e.g. IOMMU) bypass quirk feature.
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+ * If set - use platform DMA tools to access the memory.
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  *
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  * Note the reverse polarity (compared to most other features),
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  * this is for compatibility with legacy systems.
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  */
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-#define VIRTIO_F_IOMMU_PLATFORM		33
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+#define VIRTIO_F_ACCESS_PLATFORM	33
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+#ifndef __KERNEL__
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+/* Legacy name for VIRTIO_F_ACCESS_PLATFORM (for compatibility with old userspace) */
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+#define VIRTIO_F_IOMMU_PLATFORM		VIRTIO_F_ACCESS_PLATFORM
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+#endif /* __KERNEL__ */
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+
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+/* This feature indicates support for the packed virtqueue layout. */
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+#define VIRTIO_F_RING_PACKED		34
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+
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+/*
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+ * This feature indicates that memory accesses by the driver and the
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+ * device are ordered in a way described by the platform.
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+ */
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+#define VIRTIO_F_ORDER_PLATFORM		36
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 /*
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  * Does the device support Single Root I/O Virtualization?