}
static int kvmppc_mmu_book3s_32_xlate_bat(struct kvm_vcpu *vcpu, gva_t eaddr,
- struct kvmppc_pte *pte, bool data);
+ struct kvmppc_pte *pte, bool data,
+ bool iswrite);
static int kvmppc_mmu_book3s_32_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid,
u64 *vsid);
u64 vsid;
struct kvmppc_pte pte;
- if (!kvmppc_mmu_book3s_32_xlate_bat(vcpu, eaddr, &pte, data))
+ if (!kvmppc_mmu_book3s_32_xlate_bat(vcpu, eaddr, &pte, data, false))
return pte.vpage;
kvmppc_mmu_book3s_32_esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
kvmppc_set_msr(vcpu, 0);
}
-static hva_t kvmppc_mmu_book3s_32_get_pteg(struct kvmppc_vcpu_book3s *vcpu_book3s,
+static hva_t kvmppc_mmu_book3s_32_get_pteg(struct kvm_vcpu *vcpu,
u32 sre, gva_t eaddr,
bool primary)
{
+ struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
u32 page, hash, pteg, htabmask;
hva_t r;
kvmppc_get_pc(&vcpu_book3s->vcpu), eaddr, vcpu_book3s->sdr1, pteg,
sr_vsid(sre));
- r = gfn_to_hva(vcpu_book3s->vcpu.kvm, pteg >> PAGE_SHIFT);
+ r = gfn_to_hva(vcpu->kvm, pteg >> PAGE_SHIFT);
if (kvm_is_error_hva(r))
return r;
return r | (pteg & ~PAGE_MASK);
}
static int kvmppc_mmu_book3s_32_xlate_bat(struct kvm_vcpu *vcpu, gva_t eaddr,
- struct kvmppc_pte *pte, bool data)
+ struct kvmppc_pte *pte, bool data,
+ bool iswrite)
{
struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
struct kvmppc_bat *bat;
printk(KERN_INFO "BAT is not readable!\n");
continue;
}
- if (!pte->may_write) {
- /* let's treat r/o BATs as not-readable for now */
+ if (iswrite && !pte->may_write) {
dprintk_pte("BAT is read-only!\n");
continue;
}
static int kvmppc_mmu_book3s_32_xlate_pte(struct kvm_vcpu *vcpu, gva_t eaddr,
struct kvmppc_pte *pte, bool data,
- bool primary)
+ bool iswrite, bool primary)
{
- struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
u32 sre;
hva_t ptegp;
u32 pteg[16];
pte->vpage = kvmppc_mmu_book3s_32_ea_to_vp(vcpu, eaddr, data);
- ptegp = kvmppc_mmu_book3s_32_get_pteg(vcpu_book3s, sre, eaddr, primary);
+ ptegp = kvmppc_mmu_book3s_32_get_pteg(vcpu, sre, eaddr, primary);
if (kvm_is_error_hva(ptegp)) {
printk(KERN_INFO "KVM: Invalid PTEG!\n");
goto no_page_found;
break;
}
- if ( !pte->may_read )
- continue;
-
dprintk_pte("MMU: Found PTE -> %x %x - %x\n",
pteg[i], pteg[i+1], pp);
found = 1;
/* Update PTE C and A bits, so the guest's swapper knows we used the
page */
if (found) {
- u32 oldpte = pteg[i+1];
-
- if (pte->may_read)
- pteg[i+1] |= PTEG_FLAG_ACCESSED;
- if (pte->may_write)
- pteg[i+1] |= PTEG_FLAG_DIRTY;
- else
- dprintk_pte("KVM: Mapping read-only page!\n");
-
- /* Write back into the PTEG */
- if (pteg[i+1] != oldpte)
- copy_to_user((void __user *)ptegp, pteg, sizeof(pteg));
-
+ u32 pte_r = pteg[i+1];
+ char __user *addr = (char __user *) &pteg[i+1];
+
+ /*
+ * Use single-byte writes to update the HPTE, to
+ * conform to what real hardware does.
+ */
+ if (pte->may_read && !(pte_r & PTEG_FLAG_ACCESSED)) {
+ pte_r |= PTEG_FLAG_ACCESSED;
+ put_user(pte_r >> 8, addr + 2);
+ }
+ if (iswrite && pte->may_write && !(pte_r & PTEG_FLAG_DIRTY)) {
+ pte_r |= PTEG_FLAG_DIRTY;
+ put_user(pte_r, addr + 3);
+ }
+ if (!pte->may_read || (iswrite && !pte->may_write))
+ return -EPERM;
return 0;
}
}
static int kvmppc_mmu_book3s_32_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
- struct kvmppc_pte *pte, bool data)
+ struct kvmppc_pte *pte, bool data,
+ bool iswrite)
{
int r;
ulong mp_ea = vcpu->arch.magic_page_ea;
pte->eaddr = eaddr;
+ pte->page_size = MMU_PAGE_4K;
/* Magic page override */
if (unlikely(mp_ea) &&
return 0;
}
- r = kvmppc_mmu_book3s_32_xlate_bat(vcpu, eaddr, pte, data);
+ r = kvmppc_mmu_book3s_32_xlate_bat(vcpu, eaddr, pte, data, iswrite);
if (r < 0)
- r = kvmppc_mmu_book3s_32_xlate_pte(vcpu, eaddr, pte, data, true);
+ r = kvmppc_mmu_book3s_32_xlate_pte(vcpu, eaddr, pte,
+ data, iswrite, true);
if (r < 0)
- r = kvmppc_mmu_book3s_32_xlate_pte(vcpu, eaddr, pte, data, false);
+ r = kvmppc_mmu_book3s_32_xlate_pte(vcpu, eaddr, pte,
+ data, iswrite, false);
return r;
}
static void kvmppc_mmu_book3s_32_tlbie(struct kvm_vcpu *vcpu, ulong ea, bool large)
{
- kvmppc_mmu_pte_flush(vcpu, ea, 0x0FFFF000);
+ int i;
+ struct kvm_vcpu *v;
+
+ /* flush this VA on all cpus */
+ kvm_for_each_vcpu(i, v, vcpu->kvm)
+ kvmppc_mmu_pte_flush(v, ea, 0x0FFFF000);
}
static int kvmppc_mmu_book3s_32_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid,