On 07/11/2010 06:42 PM, Avi Kivity wrote:
Paritition the function into three sections:
- fetching indirect shadow pages (host_level> guest_level)
- fetching direct shadow pages (page_level< host_level<= guest_level)
- the final spte (page_level == host_level)
Instead of the current spaghetti.
+
+ 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);
+
+ direct_gfn = gw->gfn& ~(KVM_PAGES_PER_HPAGE(level) - 1);
+ sp = kvm_mmu_get_page(vcpu, direct_gfn, addr, level-1,
+ true, direct_access, sptep);
link_shadow_page(sptep, sp);
}
validate_direct_spte() should be before the 'continue' above, probably.
--
error compiling committee.c: too many arguments to function
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