[PATCH 05/14] drm/i915/gvt: Add software PTE flag to mark special 64K splited entry

[Du, Changbin]

On Fri, Mar 23, 2018 at 11:20:42AM +0800, Zhenyu Wang wrote:
> On 2018.03.15 15:05:04 +0800, changbin.du at intel.com wrote:
> > From: Changbin Du <changbin.du at intel.com>
> > 
> > This add a software PTE flag on the Ignored bit of PTE. It will be used
> > to identify splited 64K shadow entries.
> > 
> > Signed-off-by: Changbin Du <changbin.du at intel.com>
> > ---
> >  drivers/gpu/drm/i915/gvt/gtt.c | 21 +++++++++++++++++++++
> >  drivers/gpu/drm/i915/gvt/gtt.h |  3 +++
> >  2 files changed, 24 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c
> > index 2bc7afd..05b724e 100644
> > --- a/drivers/gpu/drm/i915/gvt/gtt.c
> > +++ b/drivers/gpu/drm/i915/gvt/gtt.c
> > @@ -348,6 +348,9 @@ static inline int gtt_set_entry64(void *pt,
> >  #define ADDR_64K_MASK	GENMASK_ULL(GTT_HAW - 1, 16)
> >  #define ADDR_4K_MASK	GENMASK_ULL(GTT_HAW - 1, 12)
> >  
> > +#define GTT_SPTE_FLAG_MASK GENMASK(52, 62)
> 
> GENMASK low to high?
> 

Yes, thanks for pointing out!