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suspend: make serial ports wakeup the guest.

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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>
This commit is contained in:
Gerd Hoffmann 2012-02-23 13:45:23 +01:00 committed by Anthony Liguori
parent fd214d1828
commit 9826fd597d
1 changed files with 6 additions and 0 deletions
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6
hw/serial.c
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@ -139,6 +139,7 @@ struct SerialState {
int it_shift;
int baudbase;
int tsr_retry;
uint32_t wakeup;
uint64_t last_xmit_ts; /* Time when the last byte was successfully sent out of the tsr */
SerialFIFO recv_fifo;
@ -635,6 +636,10 @@ static int serial_can_receive1(void *opaque)
static void serial_receive1(void *opaque, const uint8_t *buf, int size)
{
SerialState *s = opaque;
if (s->wakeup) {
qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
}
if(s->fcr & UART_FCR_FE) {
int i;
for (i = 0; i < size; i++) {
@ -884,6 +889,7 @@ static Property serial_isa_properties[] = {
DEFINE_PROP_HEX32("iobase", ISASerialState, iobase, -1),
DEFINE_PROP_UINT32("irq", ISASerialState, isairq, -1),
DEFINE_PROP_CHR("chardev", ISASerialState, state.chr),
DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0),
DEFINE_PROP_END_OF_LIST(),
};