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Re: [Qemu-devel] [RFC PATCH v2 06/49] serial: fixing vmstate for save/re
From: |
Pavel Dovgaluk |
Subject: |
Re: [Qemu-devel] [RFC PATCH v2 06/49] serial: fixing vmstate for save/restore |
Date: |
Wed, 30 Jul 2014 11:01:59 +0400 |
> -----Original Message-----
> From: Paolo Bonzini [mailto:address@hidden On Behalf Of Paolo Bonzini
> Sent: Monday, July 28, 2014 1:59 PM
> To: Pavel Dovgalyuk; address@hidden
> Cc: address@hidden; address@hidden; address@hidden;
> address@hidden; address@hidden; address@hidden
> Subject: Re: [RFC PATCH v2 06/49] serial: fixing vmstate for save/restore
>
> Il 17/07/2014 13:02, Pavel Dovgalyuk ha scritto:
> > - .version_id = 3,
> > + .version_id = 4,
> > .minimum_version_id = 2,
> > .pre_save = serial_pre_save,
> > .post_load = serial_post_load,
> > .fields = (VMStateField[]) {
> > VMSTATE_UINT16_V(divider, SerialState, 2),
> > VMSTATE_UINT8(rbr, SerialState),
> > + VMSTATE_UINT8_V(thr, SerialState, 4),
> > + VMSTATE_UINT8_V(tsr, SerialState, 4),
> > VMSTATE_UINT8(ier, SerialState),
> > VMSTATE_UINT8(iir, SerialState),
> > VMSTATE_UINT8(lcr, SerialState),
> > @@ -613,6 +627,15 @@ const VMStateDescription vmstate_serial = {
> > VMSTATE_UINT8(msr, SerialState),
> > VMSTATE_UINT8(scr, SerialState),
> > VMSTATE_UINT8_V(fcr_vmstate, SerialState, 3),
> > + VMSTATE_INT32_V(thr_ipending, SerialState, 4),
>
> Subsection, only migrated if it doesn't match "(s->iir & UART_IIR_ID) ==
> UART_IIR_THRI".
thr_ipending is set here:
if (s->lsr & UART_LSR_THRE) {
s->lsr |= UART_LSR_TEMT;
s->thr_ipending = 1;
serial_update_irq(s);
}
serial_update_irq has several if-else branches. One of them sets tmp_iir =
UART_IIR_THRI, as you said.
Couldn't be possible, that this branch will not be reached, because one of the
previous ones will be executed?
Pavel Dovgalyuk
[Qemu-devel] [RFC PATCH v2 08/49] hpet: fixing saving and loading process, Pavel Dovgalyuk, 2014/07/17
[Qemu-devel] [RFC PATCH v2 10/49] rtl8139: adding new fields to vmstate, Pavel Dovgalyuk, 2014/07/17
[Qemu-devel] [RFC PATCH v2 09/49] pckbd: adding new fields to vmstate, Pavel Dovgalyuk, 2014/07/17