suspend: make serial ports wakeup the guest.
Add a 'wakeup' property to the serial port. It is off by default. When enabled any incoming character on the serial line will wake up the guest. Useful for guests which have a serial console configured. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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@ -139,6 +139,7 @@ struct SerialState {
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int it_shift;
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int baudbase;
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int tsr_retry;
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uint32_t wakeup;
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uint64_t last_xmit_ts; /* Time when the last byte was successfully sent out of the tsr */
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SerialFIFO recv_fifo;
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@ -635,6 +636,10 @@ static int serial_can_receive1(void *opaque)
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static void serial_receive1(void *opaque, const uint8_t *buf, int size)
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{
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SerialState *s = opaque;
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if (s->wakeup) {
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qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
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}
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if(s->fcr & UART_FCR_FE) {
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int i;
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for (i = 0; i < size; i++) {
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@ -884,6 +889,7 @@ static Property serial_isa_properties[] = {
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DEFINE_PROP_HEX32("iobase", ISASerialState, iobase, -1),
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DEFINE_PROP_UINT32("irq", ISASerialState, isairq, -1),
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DEFINE_PROP_CHR("chardev", ISASerialState, state.chr),
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DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0),
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DEFINE_PROP_END_OF_LIST(),
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};
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