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

On 6/9/23 12:33 PM, Elliot Berman wrote:

quoted

quoted

+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?

quoted

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+
+    eventfd_signal(iofd->ctx, 1);
+    return 0;
+}

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

					-Alex