kern: iotap: Expose I/O taps to userland

Expose I/O taps to userland using a tap message interface. An
application may construct a tap message to send to the kernel requesting
data from a specific tap, if there is data, the buffers will be safely
populated, otherwise some error returned.

An example is accessing the PS/2 keyboard tap:

--

char name[] = "i8042.port.0";
char buf[2] = {0, 0};
struct iotap_msg msg = {
    .opcode = IOTAP_OPC_READ,
    .buf = buf,
    .len = len
};

...

/* muxtap() may be used */

...
--

Signed-off-by: Ian Moffett <ian@osmora.org>

0 files changed, 0 insertions, 0 deletions