KVM: PPC: e500: MMU API

This implements a shared-memory API for giving host userspace access to
the guest's TLB.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index a5671616af8..3cf6fba513a 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -222,6 +222,9 @@ int kvm_dev_ioctl_check_extension(long ext)
         case KVM_CAP_PPC_PAIRED_SINGLES:
         case KVM_CAP_PPC_OSI:
         case KVM_CAP_PPC_GET_PVINFO:
+#ifdef CONFIG_KVM_E500
+        case KVM_CAP_SW_TLB:
+#endif
                 r = 1;
                 break;
         case KVM_CAP_COALESCED_MMIO:
@@ -602,6 +605,19 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
                 r = 0;
                 vcpu->arch.papr_enabled = true;
                 break;
+#ifdef CONFIG_KVM_E500
+        case KVM_CAP_SW_TLB: {
+                struct kvm_config_tlb cfg;
+                void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
+
+                r = -EFAULT;
+                if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
+                        break;
+
+                r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
+                break;
+        }
+#endif
         default:
                 r = -EINVAL;
                 break;
@@ -651,6 +667,18 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
                 break;
         }
+
+#ifdef CONFIG_KVM_E500
+        case KVM_DIRTY_TLB: {
+                struct kvm_dirty_tlb dirty;
+                r = -EFAULT;
+                if (copy_from_user(&dirty, argp, sizeof(dirty)))
+                        goto out;
+                r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
+                break;
+        }
+#endif
+
         default:
                 r = -EINVAL;
         }