diff options
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_mmu.c | 150 |
1 files changed, 72 insertions, 78 deletions
diff --git a/arch/powerpc/kvm/book3s_64_mmu.c b/arch/powerpc/kvm/book3s_64_mmu.c index 739bfbadb85e..7e345e00661a 100644 --- a/arch/powerpc/kvm/book3s_64_mmu.c +++ b/arch/powerpc/kvm/book3s_64_mmu.c @@ -182,10 +182,13 @@ static int kvmppc_mmu_book3s_64_xlate(struct kvm_vcpu *vcpu, gva_t eaddr, hva_t ptegp; u64 pteg[16]; u64 avpn = 0; + u64 v, r; + u64 v_val, v_mask; + u64 eaddr_mask; int i; - u8 key = 0; + u8 pp, key = 0; bool found = false; - int second = 0; + bool second = false; ulong mp_ea = vcpu->arch.magic_page_ea; /* Magic page override */ @@ -208,8 +211,16 @@ static int kvmppc_mmu_book3s_64_xlate(struct kvm_vcpu *vcpu, gva_t eaddr, goto no_seg_found; avpn = kvmppc_mmu_book3s_64_get_avpn(slbe, eaddr); + v_val = avpn & HPTE_V_AVPN; + if (slbe->tb) - avpn |= SLB_VSID_B_1T; + v_val |= SLB_VSID_B_1T; + if (slbe->large) + v_val |= HPTE_V_LARGE; + v_val |= HPTE_V_VALID; + + v_mask = SLB_VSID_B | HPTE_V_AVPN | HPTE_V_LARGE | HPTE_V_VALID | + HPTE_V_SECONDARY; do_second: ptegp = kvmppc_mmu_book3s_64_get_pteg(vcpu_book3s, slbe, eaddr, second); @@ -227,91 +238,74 @@ do_second: key = 4; for (i=0; i<16; i+=2) { - u64 v = pteg[i]; - u64 r = pteg[i+1]; - - /* Valid check */ - if (!(v & HPTE_V_VALID)) - continue; - /* Hash check */ - if ((v & HPTE_V_SECONDARY) != second) - continue; - - /* AVPN compare */ - if (HPTE_V_COMPARE(avpn, v)) { - u8 pp = (r & HPTE_R_PP) | key; - int eaddr_mask = 0xFFF; - - gpte->eaddr = eaddr; - gpte->vpage = kvmppc_mmu_book3s_64_ea_to_vp(vcpu, - eaddr, - data); - if (slbe->large) - eaddr_mask = 0xFFFFFF; - gpte->raddr = (r & HPTE_R_RPN) | (eaddr & eaddr_mask); - gpte->may_execute = ((r & HPTE_R_N) ? false : true); - gpte->may_read = false; - gpte->may_write = false; - - switch (pp) { - case 0: - case 1: - case 2: - case 6: - gpte->may_write = true; - /* fall through */ - case 3: - case 5: - case 7: - gpte->may_read = true; - break; - } - - dprintk("KVM MMU: Translated 0x%lx [0x%llx] -> 0x%llx " - "-> 0x%lx\n", - eaddr, avpn, gpte->vpage, gpte->raddr); + /* Check all relevant fields of 1st dword */ + if ((pteg[i] & v_mask) == v_val) { found = true; break; } } - /* Update PTE R and C bits, so the guest's swapper knows we used the - * page */ - if (found) { - u32 oldr = pteg[i+1]; + if (!found) { + if (second) + goto no_page_found; + v_val |= HPTE_V_SECONDARY; + second = true; + goto do_second; + } - if (gpte->may_read) { - /* Set the accessed flag */ - pteg[i+1] |= HPTE_R_R; - } - if (gpte->may_write) { - /* Set the dirty flag */ - pteg[i+1] |= HPTE_R_C; - } else { - dprintk("KVM: Mapping read-only page!\n"); - } + v = pteg[i]; + r = pteg[i+1]; + pp = (r & HPTE_R_PP) | key; + eaddr_mask = 0xFFF; + + gpte->eaddr = eaddr; + gpte->vpage = kvmppc_mmu_book3s_64_ea_to_vp(vcpu, eaddr, data); + if (slbe->large) + eaddr_mask = 0xFFFFFF; + gpte->raddr = (r & HPTE_R_RPN & ~eaddr_mask) | (eaddr & eaddr_mask); + gpte->may_execute = ((r & HPTE_R_N) ? false : true); + gpte->may_read = false; + gpte->may_write = false; + + switch (pp) { + case 0: + case 1: + case 2: + case 6: + gpte->may_write = true; + /* fall through */ + case 3: + case 5: + case 7: + gpte->may_read = true; + break; + } - /* Write back into the PTEG */ - if (pteg[i+1] != oldr) - copy_to_user((void __user *)ptegp, pteg, sizeof(pteg)); + dprintk("KVM MMU: Translated 0x%lx [0x%llx] -> 0x%llx " + "-> 0x%lx\n", + eaddr, avpn, gpte->vpage, gpte->raddr); - if (!gpte->may_read) - return -EPERM; - return 0; - } else { - dprintk("KVM MMU: No PTE found (ea=0x%lx sdr1=0x%llx " - "ptegp=0x%lx)\n", - eaddr, to_book3s(vcpu)->sdr1, ptegp); - for (i = 0; i < 16; i += 2) - dprintk(" %02d: 0x%llx - 0x%llx (0x%llx)\n", - i, pteg[i], pteg[i+1], avpn); - - if (!second) { - second = HPTE_V_SECONDARY; - goto do_second; - } + /* Update PTE R and C bits, so the guest's swapper knows we used the + * page */ + if (gpte->may_read) { + /* Set the accessed flag */ + r |= HPTE_R_R; + } + if (data && gpte->may_write) { + /* Set the dirty flag -- XXX even if not writing */ + r |= HPTE_R_C; + } + + /* Write back into the PTEG */ + if (pteg[i+1] != r) { + pteg[i+1] = r; + copy_to_user((void __user *)ptegp, pteg, sizeof(pteg)); } + if (!gpte->may_read) + return -EPERM; + return 0; + no_page_found: return -ENOENT; |