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Bug fixes.

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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

Bug fixes.

# gpg: Signature made Tue 17 Jul 2018 16:06:07 BST
# gpg:                using RSA key BFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini/tags/for-upstream:
  Document command line options with single dash
  opts: remove redundant check for NULL parameter
  i386: only parse the initrd_filename once for multiboot modules
  i386: fix regression parsing multiboot initrd modules
  virtio-scsi: fix hotplug ->reset() vs event race
  qdev: add HotplugHandler->post_plug() callback
  hw/char/serial: retry write if EAGAIN
  PC Chipset: Improve serial divisor calculation
  vhost-user-test: added proper TestServer *dest initialization in test_migrate()
  hyperv: ensure VP index equal to QEMU cpu_index
  hyperv: rename vcpu_id to vp_index
  accel: Fix typo and grammar in comment
  dump: add kernel_gs_base to QEMU CPU state

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2018-07-17 17:06:32 +01:00
commit 59b5552f02
18 changed files with 184 additions and 62 deletions
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46
hw/char/serial.c
View file

@ -150,13 +150,10 @@ static void serial_update_irq(SerialState *s)
static void serial_update_parameters(SerialState *s)
{
int speed, parity, data_bits, stop_bits, frame_size;
float speed;
int parity, data_bits, stop_bits, frame_size;
QEMUSerialSetParams ssp;
if (s->divider == 0 || s->divider > s->baudbase) {
return;
}
/* Start bit. */
frame_size = 1;
if (s->lcr & 0x08) {
@ -169,14 +166,16 @@ static void serial_update_parameters(SerialState *s)
} else {
parity = 'N';
}
if (s->lcr & 0x04)
if (s->lcr & 0x04) {
stop_bits = 2;
else
} else {
stop_bits = 1;
}
data_bits = (s->lcr & 0x03) + 5;
frame_size += data_bits + stop_bits;
speed = s->baudbase / s->divider;
/* Zero divisor should give about 3500 baud */
speed = (s->divider == 0) ? 3500 : (float) s->baudbase / s->divider;
ssp.speed = speed;
ssp.parity = parity;
ssp.data_bits = data_bits;
@ -184,7 +183,7 @@ static void serial_update_parameters(SerialState *s)
s->char_transmit_time = (NANOSECONDS_PER_SECOND / speed) * frame_size;
qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_SERIAL_SET_PARAMS, &ssp);
DPRINTF("speed=%d parity=%c data=%d stop=%d\n",
DPRINTF("speed=%.2f parity=%c data=%d stop=%d\n",
speed, parity, data_bits, stop_bits);
}
@ -261,15 +260,20 @@ static void serial_xmit(SerialState *s)
if (s->mcr & UART_MCR_LOOP) {
/* in loopback mode, say that we just received a char */
serial_receive1(s, &s->tsr, 1);
} else if (qemu_chr_fe_write(&s->chr, &s->tsr, 1) == 0 &&
s->tsr_retry < MAX_XMIT_RETRY) {
assert(s->watch_tag == 0);
s->watch_tag =
qemu_chr_fe_add_watch(&s->chr, G_IO_OUT | G_IO_HUP,
serial_watch_cb, s);
if (s->watch_tag > 0) {
s->tsr_retry++;
return;
} else {
int rc = qemu_chr_fe_write(&s->chr, &s->tsr, 1);
if ((rc == 0 ||
(rc == -1 && errno == EAGAIN)) &&
s->tsr_retry < MAX_XMIT_RETRY) {
assert(s->watch_tag == 0);
s->watch_tag =
qemu_chr_fe_add_watch(&s->chr, G_IO_OUT | G_IO_HUP,
serial_watch_cb, s);
if (s->watch_tag > 0) {
s->tsr_retry++;
return;
}
}
}
s->tsr_retry = 0;
@ -341,7 +345,11 @@ static void serial_ioport_write(void *opaque, hwaddr addr, uint64_t val,
default:
case 0:
if (s->lcr & UART_LCR_DLAB) {
s->divider = (s->divider & 0xff00) | val;
if (size == 2) {
s->divider = (s->divider & 0xff00) | val;
} else if (size == 4) {
s->divider = val;
}
serial_update_parameters(s);
} else {
s->thr = (uint8_t) val;