Re: [Qemu-devel] [PATCH v4 5/7] RTC:Add RTC update-ended interrupt support

[Stefano Stabellini]

On Wed, 21 Mar 2012, Paolo Bonzini wrote:
> Il 20/03/2012 19:35, Stefano Stabellini ha scritto:
> > This is the function that is used to figure out whether we need the
> > timers or not, the condition seems to be:
> > 
> > (Not (REG_C_UF | REG_C_AF)) And (Not (REG_B_SET))
> > 
> > Shouldn't actually check for UIE being enabled?
> 
> No, you need to set UF in case the code observes it without actually
> enabling interrupt delivery on the ISA bus.
 
Well, if it is just about updating UF, can we do it only when the user
reads REG_C?
I am just trying to limit the need for the update_timers...