diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_rm_mmu.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_rm_mmu.c | 41 |
1 files changed, 37 insertions, 4 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c index 6148493..84dae82 100644 --- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c +++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c @@ -20,6 +20,25 @@ #include <asm/synch.h> #include <asm/ppc-opcode.h> +/* + * Since this file is built in even if KVM is a module, we need + * a local copy of this function for the case where kvm_main.c is + * modular. + */ +static struct kvm_memory_slot *builtin_gfn_to_memslot(struct kvm *kvm, + gfn_t gfn) +{ + struct kvm_memslots *slots; + struct kvm_memory_slot *memslot; + + slots = kvm_memslots(kvm); + kvm_for_each_memslot(memslot, slots) + if (gfn >= memslot->base_gfn && + gfn < memslot->base_gfn + memslot->npages) + return memslot; + return NULL; +} + /* Translate address of a vmalloc'd thing to a linear map address */ static void *real_vmalloc_addr(void *x) { @@ -59,10 +78,12 @@ long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags, { unsigned long porder; struct kvm *kvm = vcpu->kvm; - unsigned long i, lpn, pa; + unsigned long i, gfn, lpn, pa; unsigned long *hpte; struct revmap_entry *rev; unsigned long g_ptel = ptel; + struct kvm_memory_slot *memslot; + unsigned long *physp; /* only handle 4k, 64k and 16M pages for now */ porder = 12; @@ -80,12 +101,24 @@ long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags, } else return H_PARAMETER; } - lpn = (ptel & HPTE_R_RPN) >> kvm->arch.ram_porder; - if (lpn >= kvm->arch.ram_npages || porder > kvm->arch.ram_porder) + if (porder > kvm->arch.ram_porder) return H_PARAMETER; - pa = kvm->arch.ram_pginfo[lpn].pfn << PAGE_SHIFT; + + gfn = ((ptel & HPTE_R_RPN) & ~((1ul << porder) - 1)) >> PAGE_SHIFT; + memslot = builtin_gfn_to_memslot(kvm, gfn); + if (!(memslot && !(memslot->flags & KVM_MEMSLOT_INVALID))) + return H_PARAMETER; + physp = kvm->arch.slot_phys[memslot->id]; + if (!physp) + return H_PARAMETER; + + lpn = (gfn - memslot->base_gfn) >> (kvm->arch.ram_porder - PAGE_SHIFT); + physp = real_vmalloc_addr(physp + lpn); + pa = *physp; if (!pa) return H_PARAMETER; + pa &= PAGE_MASK; + /* Check WIMG */ if ((ptel & HPTE_R_WIMG) != HPTE_R_M && (ptel & HPTE_R_WIMG) != (HPTE_R_W | HPTE_R_I | HPTE_R_M)) |