Merge branch 'kvm-ppc-next' of git://github.com/agraf/linux-2.6 into kvm-queue

[~andy/linux] / arch / powerpc / kvm / book3s_hv_rm_mmu.c

diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
index daa19a043677db89228abea7ca37f01d2709815f..37fb3caa4c80a59c5162b92943e1d7878991b8f1 100644 (file)
--- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
+++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
@@ -225,6 +225,7 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
                is_io = pa & (HPTE_R_I | HPTE_R_W);
                pte_size = PAGE_SIZE << (pa & KVMPPC_PAGE_ORDER_MASK);
                pa &= PAGE_MASK;
+               pa |= gpa & ~PAGE_MASK;
        } else {
                /* Translate to host virtual address */
                hva = __gfn_to_hva_memslot(memslot, gfn);
@@ -239,13 +240,13 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
                                ptel = hpte_make_readonly(ptel);
                        is_io = hpte_cache_bits(pte_val(pte));
                        pa = pte_pfn(pte) << PAGE_SHIFT;
+                       pa |= hva & (pte_size - 1);
+                       pa |= gpa & ~PAGE_MASK;
                }
        }
 
        if (pte_size < psize)
                return H_PARAMETER;
-       if (pa && pte_size > psize)
-               pa |= gpa & (pte_size - 1);
 
        ptel &= ~(HPTE_R_PP0 - psize);
        ptel |= pa;
@@ -751,6 +752,10 @@ static int slb_base_page_shift[4] = {
        20,     /* 1M, unsupported */
 };
 
+/* When called from virtmode, this func should be protected by
+ * preempt_disable(), otherwise, the holding of HPTE_V_HVLOCK
+ * can trigger deadlock issue.
+ */
 long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr, unsigned long slb_v,
                              unsigned long valid)
 {