Re: [PATCH v13 23/24] virt: gunyah: Add ioeventfd

[Alex Elder]

On 6/9/23 12:33 PM, Elliot Berman wrote:
> > > +static int gh_write_ioeventfd(struct gh_vm_io_handler *io_dev, u64 
> > > addr, u32 len, u64 data)
> > > +{
> > > +    struct gh_ioeventfd *iofd = container_of(io_dev, struct 
> > > gh_ioeventfd, io_handler);
> >
> > Does a write of 0 bytes still signal an event?
>
>  From gunyah_ioeventfd perspective, yes. I don't think a write of 0 
> bytes is possible, but maybe you are thinking of scenario I'm not?
>
> > > +
> > > +    eventfd_signal(iofd->ctx, 1);
> > > +    return 0;
> > > +} 

No, I was just observing that eventfd_signal() is called regardless
of the value of len.

					-Alex