On Tue, Jun 12, 2012 at 10:23:47AM +0800, Xiao Guangrong wrote: > On 06/12/2012 07:32 AM, Marcelo Tosatti wrote: > > > On Tue, May 29, 2012 at 02:49:14PM +0800, Xiao Guangrong wrote: > >> This bit indicates whether the spte can be writable on MMU, that means > >> the corresponding gpte is writable and the corresponding gfn is not > >> protected by shadow page protection > > > > Why is this still necessary, now that only sptes of direct shadow pages > > are updated locklessly? > > > > > Yes, but it is still needed, for nested npt/ept, we need protect > the nested page tables. Sure, but shadowed L1 nested pagetables are not direct shadow pages. They are shadows of L1 nested pagetables. Checking sp->direct should be enough (instead of the flags). -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
