On 27 August 2015 at 13:25, Michael S. Tsirkin <m...@redhat.com> wrote: > On Thu, Aug 27, 2015 at 01:20:52PM +0100, Peter Maydell wrote: >> On 27 August 2015 at 13:17, Michael S. Tsirkin <m...@redhat.com> wrote: >> > Basically the point is that ABI is extended to make >> > ioeventfd with len = 0 mean "any length". >> > 0 is thus not meaningless anymore. >> >> But how can you do adjustment for incorrect endianness >> if you don't know the size of the data that you're >> trying to work with? That's why this switch insists >> that the size is 1, 2, 4 or 8.
> For kvm at least, "any length" implies "any data". > So data is eventually discarded, we don't really need > to adjust it for endian-ness. I'm still confused. If you have data it needs to be adjusted. If we're not actually doing anything with the data why are we calling this function in the first place? -- PMM
