KVM: ia64: vTLB change for enabling windows 2008 boot

[sfrench/cifs-2.6.git] / arch / ia64 / kvm / vtlb.c

diff --git a/arch/ia64/kvm/vtlb.c b/arch/ia64/kvm/vtlb.c
index ac94867f82679389b40d7f0c5766b23976c980f7..38232b37668b3be87e8c8404aac2caea282bcc67 100644 (file)
--- a/arch/ia64/kvm/vtlb.c
+++ b/arch/ia64/kvm/vtlb.c
@@ -164,11 +164,11 @@ static void vhpt_insert(u64 pte, u64 itir, u64 ifa, u64 gpte)
        unsigned long ps, gpaddr;
 
        ps = itir_ps(itir);
+       rr.val = ia64_get_rr(ifa);
 
-       gpaddr = ((gpte & _PAGE_PPN_MASK) >> ps << ps) |
-               (ifa & ((1UL << ps) - 1));
+        gpaddr = ((gpte & _PAGE_PPN_MASK) >> ps << ps) |
+                                       (ifa & ((1UL << ps) - 1));
 
-       rr.val = ia64_get_rr(ifa);
        head = (struct thash_data *)ia64_thash(ifa);
        head->etag = INVALID_TI_TAG;
        ia64_mf();
@@ -412,16 +412,14 @@ u64 translate_phy_pte(u64 *pte, u64 itir, u64 va)
 
 /*
  * Purge overlap TCs and then insert the new entry to emulate itc ops.
- *    Notes: Only TC entry can purge and insert.
- *    1 indicates this is MMIO
+ * Notes: Only TC entry can purge and insert.
  */
-int thash_purge_and_insert(struct kvm_vcpu *v, u64 pte, u64 itir,
+void  thash_purge_and_insert(struct kvm_vcpu *v, u64 pte, u64 itir,
                                                u64 ifa, int type)
 {
        u64 ps;
        u64 phy_pte, io_mask, index;
        union ia64_rr vrr, mrr;
-       int ret = 0;
 
        ps = itir_ps(itir);
        vrr.val = vcpu_get_rr(v, ifa);
@@ -441,25 +439,19 @@ int thash_purge_and_insert(struct kvm_vcpu *v, u64 pte, u64 itir,
                phy_pte &= ~_PAGE_MA_MASK;
        }
 
-       if (pte & VTLB_PTE_IO)
-               ret = 1;
-
        vtlb_purge(v, ifa, ps);
        vhpt_purge(v, ifa, ps);
 
-       if (ps == mrr.ps) {
-               if (!(pte&VTLB_PTE_IO)) {
-                       vhpt_insert(phy_pte, itir, ifa, pte);
-               } else {
-                       vtlb_insert(v, pte, itir, ifa);
-                       vcpu_quick_region_set(VMX(v, tc_regions), ifa);
-               }
-       } else if (ps > mrr.ps) {
+       if ((ps != mrr.ps) || (pte & VTLB_PTE_IO)) {
                vtlb_insert(v, pte, itir, ifa);
                vcpu_quick_region_set(VMX(v, tc_regions), ifa);
-               if (!(pte&VTLB_PTE_IO))
-                       vhpt_insert(phy_pte, itir, ifa, pte);
-       } else {
+       }
+       if (pte & VTLB_PTE_IO)
+               return;
+
+       if (ps >= mrr.ps)
+               vhpt_insert(phy_pte, itir, ifa, pte);
+       else {
                u64 psr;
                phy_pte  &= ~PAGE_FLAGS_RV_MASK;
                psr = ia64_clear_ic();
@@ -469,7 +461,6 @@ int thash_purge_and_insert(struct kvm_vcpu *v, u64 pte, u64 itir,
        if (!(pte&VTLB_PTE_IO))
                mark_pages_dirty(v, pte, ps);
 
-       return ret;
 }
 
 /*
@@ -570,6 +561,10 @@ void thash_init(struct thash_cb *hcb, u64 sz)
 u64 kvm_get_mpt_entry(u64 gpfn)
 {
        u64 *base = (u64 *) KVM_P2M_BASE;
+
+       if (gpfn >= (KVM_P2M_SIZE >> 3))
+               panic_vm(current_vcpu, "Invalid gpfn =%lx\n", gpfn);
+
        return *(base + gpfn);
 }