Re: [Qemu-devel] [Qemu-ppc] [PATCH 2/3 v2] Reset qemu timers when guest reset

[Scott Wood <scottwood@freescale.com>]

On 01/03/2013 07:28:49 PM, Bhushan Bharat-R65777 wrote:
> 
> 
> > -----Original Message-----
> > From: Wood Scott-B07421
> > Sent: Friday, January 04, 2013 1:51 AM
> > To: Bhushan Bharat-R65777
> > Cc: qemu-devel@nongnu.org; qemu-ppc@nongnu.org; agraf@suse.de;  
> Bhushan Bharat-
> > R65777
> > Subject: Re: [Qemu-ppc] [PATCH 2/3 v2] Reset qemu timers when guest  
> reset
> >
> > On 12/27/2012 11:16:51 PM, Bharat Bhushan wrote:
> > > This patch install the timer reset handler. This will be called  
> when
> > > the guest is reset.
> > >
> > > Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
> > > ---
> > >  v2: same as v1
> > >
> > >  hw/ppc_booke.c |   12 ++++++++++++
> > >  1 files changed, 12 insertions(+), 0 deletions(-)
> > >
> > > diff --git a/hw/ppc_booke.c b/hw/ppc_booke.c index  
> d51e7fa..837a5b6
> > > 100644
> > > --- a/hw/ppc_booke.c
> > > +++ b/hw/ppc_booke.c
> > > @@ -231,6 +231,16 @@ void store_booke_tcr(CPUPPCState *env,
> > > target_ulong val)
> > >
> > >  }
> > >
> > > +static void ppc_booke_timer_reset_handle(void *opaque) {
> > > +    CPUPPCState *env = opaque;
> > > +
> > > +    env->spr[SPR_BOOKE_TSR] = 0;
> > > +    env->spr[SPR_BOOKE_TCR] = 0;
> > > +
> > > +    booke_update_irq(env);
> > > +}
> >
> > When does KVM_SET_SREGS get called?
> 
> This is part of reset processing and is not cpu_synchronize_state()  
> called before all reset handlers are called and after that  
> post_synchronize will do the KVM_SET_SREGS in kvm_put_registers().

cpu_synchronize_state() does not do KVM_SET_SREGS.  I don't see  
"post_synchronize" anywhere in the QEMU sources.

As Alex said, there needs to be a way for this function to set a flag  
that TCR and TSR have been dirtied.

-Scott