KVM: ppc: support large host pages

KVM on 440 has always been able to handle large guest mappings with 4K host
pages -- we must, since the guest kernel uses 256MB mappings.

This patch makes KVM work when the host has large pages too (tested with 64K).

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index ec59a6768ec3..924c7b4b1107 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -308,8 +308,8 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
                          * b) the guest used a large mapping which we're faking
                          * Either way, we need to satisfy the fault without
                          * invoking the guest. */
-                        kvmppc_mmu_map(vcpu, eaddr, gfn, gtlbe->tid,
-                                       gtlbe->word2);
+                        kvmppc_mmu_map(vcpu, eaddr, vcpu->arch.paddr_accessed, gtlbe->tid,
+                                       gtlbe->word2, get_tlb_bytes(gtlbe));
                         vcpu->stat.dtlb_virt_miss_exits++;
                         r = RESUME_GUEST;
                 } else {
@@ -325,6 +325,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
         case BOOKE_INTERRUPT_ITLB_MISS: {
                 struct kvmppc_44x_tlbe *gtlbe;
                 unsigned long eaddr = vcpu->arch.pc;
+                gpa_t gpaddr;
                 gfn_t gfn;
 
                 r = RESUME_GUEST;
@@ -340,7 +341,8 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 
                 vcpu->stat.itlb_virt_miss_exits++;
 
-                gfn = tlb_xlate(gtlbe, eaddr) >> PAGE_SHIFT;
+                gpaddr = tlb_xlate(gtlbe, eaddr);
+                gfn = gpaddr >> PAGE_SHIFT;
 
                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
                         /* The guest TLB had a mapping, but the shadow TLB
@@ -349,8 +351,8 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
                          * b) the guest used a large mapping which we're faking
                          * Either way, we need to satisfy the fault without
                          * invoking the guest. */
-                        kvmppc_mmu_map(vcpu, eaddr, gfn, gtlbe->tid,
-                                       gtlbe->word2);
+                        kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlbe->tid,
+                                       gtlbe->word2, get_tlb_bytes(gtlbe));
                 } else {
                         /* Guest mapped and leaped at non-RAM! */
                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);