[Qemu-devel] Re: comments on: get page size in device init

["Michael S. Tsirkin" <mst@redhat.com>]

On Wed, Sep 23, 2009 at 10:03:26PM +0300, Blue Swirl wrote:
> On Wed, Sep 23, 2009 at 9:40 PM, Michael S. Tsirkin <mst@redhat.com> wrote:
> > On Wed, Sep 23, 2009 at 01:02:56PM -0500, Anthony Liguori wrote:
> >> Blue Swirl wrote:
> >>> On Wed, Sep 23, 2009 at 3:58 PM, Michael S. Tsirkin <mst@redhat.com> wrote:
> >>>
> >>>>>     Compile msix only once
> >>>>>
> >>>>>     Get page size in device init.
> >>>>>
> >>>>>     Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
> >>>>>
> >>>> What was the motivation for the page size change?
> >>>>
> >>>
> >>> "Compile msix only once"
> >>>
> >>>
> >>>> It seems the only user passes TARGET_PAGE_SIZE anyway,
> >>>> using a constant seems clearer and probably generates
> >>>> less code. No?
> >>>>
> >>>
> >>> Yes, but then the code would depend on TARGET_PAGE_SIZE, making it
> >>> impossible to compile the code only once.
> >>>
> >>
> >> We could probably get away with doing
> >>
> >> #define TARGET_PAGE_SIZE target_get_page_size()
> >>
> >> And take care of a big chunk of this without passing page size
> >> parameters around.
> >
> >
> > Sounds good.
> 
> That would work and target_get_page_size() together with
> get_ram_size() would also handle the virtio case nicely, except for
> the if (!kvm_enabled() || kvm_has_sync_mmu()) part.

Where's get_ram_size needed?

-- 
MST