On 07/12/2010 08:08 AM, Xiao Guangrong wrote:
Avi Kivity wrote:
- if (is_shadow_present_pte(*sptep)&& !is_large_pte(*sptep)
- && level == gw->level)
- validate_direct_spte(vcpu, sptep, direct_access);
......
+ link_shadow_page(sptep, sp);
+ }
+
+ for (;
+ shadow_walk_okay(&iterator)&& iterator.level> hlevel;
+ shadow_walk_next(&iterator)) {
+ gfn_t direct_gfn;
+
+ level = iterator.level;
+ sptep = iterator.sptep;
drop_spte_if_large(vcpu, sptep);
if (is_shadow_present_pte(*sptep))
continue;
- if (level<= gw->level) {
- direct = 1;
- access = direct_access;
-
- /*
- * It is a large guest pages backed by small host pages,
- * So we set @direct(@sp->role.direct)=1, and set
- * @table_gfn(@sp->gfn)=the base page frame for linear
- * translations.
- */
- table_gfn = gw->gfn& ~(KVM_PAGES_PER_HPAGE(level) - 1);
- } else {
- direct = 0;
- table_gfn = gw->table_gfn[level - 2];
- }
- sp = kvm_mmu_get_page(vcpu, table_gfn, addr, level-1,
- direct, access, sptep);
- if (!direct)
- if (!FNAME(validate_indirect_spte)(vcpu, sptep, sp,
- gw, level)) {
- kvm_release_pfn_clean(pfn);
- sptep = NULL;
- break;
- }
+ validate_direct_spte(vcpu, sptep, direct_access);
Need validate_direct_spte() only when 'level == gw->level'
That is true (and this is a change from the current code), but level <
gw->level will be very rare (1G pages backed by 4k pages) so I don't
mind the extra check.
--
error compiling committee.c: too many arguments to function
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