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| author | Joerg Roedel <joerg.roedel@amd.com> | 2010-09-10 17:30:52 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-10-24 10:52:38 +0200 |
| commit | 2329d46d213d0721dafae18db29f54b196f11468 (patch) | |
| tree | d417b780c53b11c00e927e31bde995e26bfcb51f | |
| parent | KVM: X86: Add kvm_read_guest_page_mmu function (diff) | |
| download | linux-2329d46d213d0721dafae18db29f54b196f11468.tar.xz linux-2329d46d213d0721dafae18db29f54b196f11468.zip | |
KVM: MMU: Make walk_addr_generic capable for two-level walking
This patch uses kvm_read_guest_page_tdp to make the
walk_addr_generic functions suitable for two-level page
table walking.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/x86/kvm/paging_tmpl.h | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index eefe363156b9..f4e09d341e28 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -124,6 +124,8 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker, unsigned index, pt_access, uninitialized_var(pte_access); gpa_t pte_gpa; bool eperm, present, rsvd_fault; + int offset; + u32 access = 0; trace_kvm_mmu_pagetable_walk(addr, write_fault, user_fault, fetch_fault); @@ -153,12 +155,14 @@ walk: index = PT_INDEX(addr, walker->level); table_gfn = gpte_to_gfn(pte); - pte_gpa = gfn_to_gpa(table_gfn); - pte_gpa += index * sizeof(pt_element_t); + offset = index * sizeof(pt_element_t); + pte_gpa = gfn_to_gpa(table_gfn) + offset; walker->table_gfn[walker->level - 1] = table_gfn; walker->pte_gpa[walker->level - 1] = pte_gpa; - if (kvm_read_guest(vcpu->kvm, pte_gpa, &pte, sizeof(pte))) { + if (kvm_read_guest_page_mmu(vcpu, mmu, table_gfn, &pte, + offset, sizeof(pte), + PFERR_USER_MASK|PFERR_WRITE_MASK)) { present = false; break; } @@ -209,15 +213,27 @@ walk: is_large_pte(pte) && mmu->root_level == PT64_ROOT_LEVEL)) { int lvl = walker->level; + gpa_t real_gpa; + gfn_t gfn; - walker->gfn = gpte_to_gfn_lvl(pte, lvl); - walker->gfn += (addr & PT_LVL_OFFSET_MASK(lvl)) - >> PAGE_SHIFT; + gfn = gpte_to_gfn_lvl(pte, lvl); + gfn += (addr & PT_LVL_OFFSET_MASK(lvl)) >> PAGE_SHIFT; if (PTTYPE == 32 && walker->level == PT_DIRECTORY_LEVEL && is_cpuid_PSE36()) - walker->gfn += pse36_gfn_delta(pte); + gfn += pse36_gfn_delta(pte); + + access |= write_fault ? PFERR_WRITE_MASK : 0; + access |= fetch_fault ? PFERR_FETCH_MASK : 0; + access |= user_fault ? PFERR_USER_MASK : 0; + + real_gpa = mmu->translate_gpa(vcpu, gfn_to_gpa(gfn), + access); + if (real_gpa == UNMAPPED_GVA) + return 0; + + walker->gfn = real_gpa >> PAGE_SHIFT; break; } |