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Re: [Qemu-devel] [PATCH v2 12/12] pl031: add missed field to vmstate
From: |
Pavel Dovgaluk |
Subject: |
Re: [Qemu-devel] [PATCH v2 12/12] pl031: add missed field to vmstate |
Date: |
Tue, 2 Sep 2014 13:53:50 +0400 |
> From: Peter Maydell [mailto:address@hidden
> On 28 August 2014 12:19, Pavel Dovgalyuk <address@hidden> wrote:
> > This patch adds timer which uses virtual clock to the VMState.
> > Such timers are required for saving because virtual clock is the part
> > of the virtual machine state.
> >
> > Signed-off-by: Pavel Dovgalyuk <address@hidden>
> > ---
> > hw/timer/pl031.c | 3 ++-
> > 1 files changed, 2 insertions(+), 1 deletions(-)
> >
> > diff --git a/hw/timer/pl031.c b/hw/timer/pl031.c
> > index 34d9b44..f8e5abc 100644
> > --- a/hw/timer/pl031.c
> > +++ b/hw/timer/pl031.c
> > @@ -230,12 +230,13 @@ static int pl031_post_load(void *opaque, int
> > version_id)
> >
> > static const VMStateDescription vmstate_pl031 = {
> > .name = "pl031",
> > - .version_id = 1,
> > + .version_id = 2,
> > .minimum_version_id = 1,
> > .pre_save = pl031_pre_save,
> > .post_load = pl031_post_load,
> > .fields = (VMStateField[]) {
> > VMSTATE_UINT32(tick_offset_vmstate, PL031State),
> > + VMSTATE_TIMER_V(timer, PL031State, 2),
> > VMSTATE_UINT32(mr, PL031State),
> > VMSTATE_UINT32(lr, PL031State),
> > VMSTATE_UINT32(cr, PL031State),
>
> Looking at the code I'm not sure this patch is required.
> It looks like the intention is that the migrated state for
> the timer is in the tick_offset_vmstate: we have a
> pre-save hook that sets up that field, and then the post-load
> hook calls pl031_set_alarm() which will always completely
> reinitialise s->timer using timer_del() or timer_mod().
> What am I missing?
You are right, this is replay-specific patch, I'll remove it from this series.
Pavel Dovgalyuk