On Mon, 13 Oct 2014 16:23:58 +1030
Rusty Russell ru...@rustcorp.com.au wrote:
Cornelia Huck cornelia.h...@de.ibm.com writes:
With virtio-1, we support more than 32 feature bits. Let's make
vdev-guest_features depend on the number of supported feature bits,
allowing us to grow the feature bits automatically.
It's a judgement call, but I would say that simply using uint64_t
will be sufficient for quite a while.
I prefer this as an array for two reasons:
- It matches what ccw does anyway (we read/write features in chunks of
32 bit), so this makes the backend handling for this transport very
straightforward.
- While I don't see us running out of 64 feature bits for a while, we'd
have to touch every device and transport again when we do. I'd prefer
to do this once, as we need to change code anyway.
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