Hi Ricardo, Thanks for having a look. On Tue, Nov 29, 2022 at 12:52:12PM -0800, Ricardo Koller wrote: > On Tue, Nov 29, 2022 at 07:19:44PM +0000, Oliver Upton wrote: [...] > > + ret = stage2_update_leaf_attrs(pgt, addr, 1, KVM_PTE_LEAF_ATTR_LO_S2_AF, 0, > > + &pte, NULL, 0); > > + if (!ret) > > + dsb(ishst); > > At the moment, the only reason for stage2_update_leaf_attrs() to not > update the PTE is if it's not valid: > > if (!kvm_pte_valid(pte)) > return 0; > > I guess you could check that as well: > > + if (!ret || kvm_pte_valid(pte)) > + dsb(ishst); Thanks for catching this. Instead of pivoting on the returned PTE value, how about we return -EAGAIN from the early return in stage2_attr_walker()? It would better match the pattern used elsewhere in the pgtable code. -- Thanks, Oliver
