Merge branch 'kvm-ppc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

- fix build failures with PR KVM configurations
- fix a host crash that can occur on POWER9 with radix guests

6 files changed, 80 insertions, 22 deletions

diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index 24de532..0c52cb5 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -67,7 +67,7 @@ config KVM_BOOK3S_64
 	select KVM_BOOK3S_64_HANDLER
 	select KVM
 	select KVM_BOOK3S_PR_POSSIBLE if !KVM_BOOK3S_HV_POSSIBLE
-	select SPAPR_TCE_IOMMU if IOMMU_SUPPORT
+	select SPAPR_TCE_IOMMU if IOMMU_SUPPORT && (PPC_SERIES || PPC_POWERNV)
 	---help---
 	  Support running unmodified book3s_64 and book3s_32 guest kernels
 	  in virtual machines on book3s_64 host processors.
diff --git a/arch/powerpc/kvm/Makefile b/arch/powerpc/kvm/Makefile
index d91a260..381a6ec 100644
--- a/arch/powerpc/kvm/Makefile
+++ b/arch/powerpc/kvm/Makefile
@@ -46,7 +46,7 @@ kvm-e500mc-objs := \
 	e500_emulate.o
 kvm-objs-$(CONFIG_KVM_E500MC) := $(kvm-e500mc-objs)
 
-kvm-book3s_64-builtin-objs-$(CONFIG_KVM_BOOK3S_64_HANDLER) := \
+kvm-book3s_64-builtin-objs-$(CONFIG_SPAPR_TCE_IOMMU) := \
 	book3s_64_vio_hv.o
 
 kvm-pr-y := \
@@ -90,11 +90,11 @@ kvm-book3s_64-objs-$(CONFIG_KVM_XICS) += \
 	book3s_xics.o
 
 kvm-book3s_64-objs-$(CONFIG_KVM_XIVE) += book3s_xive.o
+kvm-book3s_64-objs-$(CONFIG_SPAPR_TCE_IOMMU) += book3s_64_vio.o
 
 kvm-book3s_64-module-objs := \
 	$(common-objs-y) \
 	book3s.o \
-	book3s_64_vio.o \
 	book3s_rtas.o \
 	$(kvm-book3s_64-objs-y)
 
diff --git a/arch/powerpc/kvm/book3s_64_vio_hv.c b/arch/powerpc/kvm/book3s_64_vio_hv.c
index eda0a8f..3adfd2f 100644
--- a/arch/powerpc/kvm/book3s_64_vio_hv.c
+++ b/arch/powerpc/kvm/book3s_64_vio_hv.c
@@ -301,6 +301,10 @@ long kvmppc_rm_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
 	/* udbg_printf("H_PUT_TCE(): liobn=0x%lx ioba=0x%lx, tce=0x%lx\n", */
 	/* 	    liobn, ioba, tce); */
 
+	/* For radix, we might be in virtual mode, so punt */
+	if (kvm_is_radix(vcpu->kvm))
+		return H_TOO_HARD;
+
 	stt = kvmppc_find_table(vcpu->kvm, liobn);
 	if (!stt)
 		return H_TOO_HARD;
@@ -381,6 +385,10 @@ long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu,
 	bool prereg = false;
 	struct kvmppc_spapr_tce_iommu_table *stit;
 
+	/* For radix, we might be in virtual mode, so punt */
+	if (kvm_is_radix(vcpu->kvm))
+		return H_TOO_HARD;
+
 	stt = kvmppc_find_table(vcpu->kvm, liobn);
 	if (!stt)
 		return H_TOO_HARD;
@@ -491,6 +499,10 @@ long kvmppc_rm_h_stuff_tce(struct kvm_vcpu *vcpu,
 	long i, ret;
 	struct kvmppc_spapr_tce_iommu_table *stit;
 
+	/* For radix, we might be in virtual mode, so punt */
+	if (kvm_is_radix(vcpu->kvm))
+		return H_TOO_HARD;
+
 	stt = kvmppc_find_table(vcpu->kvm, liobn);
 	if (!stt)
 		return H_TOO_HARD;
@@ -527,6 +539,7 @@ long kvmppc_rm_h_stuff_tce(struct kvm_vcpu *vcpu,
 	return H_SUCCESS;
 }
 
+/* This can be called in either virtual mode or real mode */
 long kvmppc_h_get_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
 		      unsigned long ioba)
 {
diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c b/arch/powerpc/kvm/book3s_hv_builtin.c
index 88a6592..ee4c255 100644
--- a/arch/powerpc/kvm/book3s_hv_builtin.c
+++ b/arch/powerpc/kvm/book3s_hv_builtin.c
@@ -207,7 +207,14 @@ EXPORT_SYMBOL_GPL(kvmppc_hwrng_present);
 
 long kvmppc_h_random(struct kvm_vcpu *vcpu)
 {
-	if (powernv_get_random_real_mode(&vcpu->arch.gpr[4]))
+	int r;
+
+	/* Only need to do the expensive mfmsr() on radix */
+	if (kvm_is_radix(vcpu->kvm) && (mfmsr() & MSR_IR))
+		r = powernv_get_random_long(&vcpu->arch.gpr[4]);
+	else
+		r = powernv_get_random_real_mode(&vcpu->arch.gpr[4]);
+	if (r)
 		return H_SUCCESS;
 
 	return H_HARDWARE;
diff --git a/arch/powerpc/kvm/book3s_pr_papr.c b/arch/powerpc/kvm/book3s_pr_papr.c
index bcbeeb6..8a4205f 100644
--- a/arch/powerpc/kvm/book3s_pr_papr.c
+++ b/arch/powerpc/kvm/book3s_pr_papr.c
@@ -50,7 +50,9 @@ static int kvmppc_h_pr_enter(struct kvm_vcpu *vcpu)
 	pteg_addr = get_pteg_addr(vcpu, pte_index);
 
 	mutex_lock(&vcpu->kvm->arch.hpt_mutex);
-	copy_from_user(pteg, (void __user *)pteg_addr, sizeof(pteg));
+	ret = H_FUNCTION;
+	if (copy_from_user(pteg, (void __user *)pteg_addr, sizeof(pteg)))
+		goto done;
 	hpte = pteg;
 
 	ret = H_PTEG_FULL;
@@ -71,7 +73,9 @@ static int kvmppc_h_pr_enter(struct kvm_vcpu *vcpu)
 	hpte[0] = cpu_to_be64(kvmppc_get_gpr(vcpu, 6));
 	hpte[1] = cpu_to_be64(kvmppc_get_gpr(vcpu, 7));
 	pteg_addr += i * HPTE_SIZE;
-	copy_to_user((void __user *)pteg_addr, hpte, HPTE_SIZE);
+	ret = H_FUNCTION;
+	if (copy_to_user((void __user *)pteg_addr, hpte, HPTE_SIZE))
+		goto done;
 	kvmppc_set_gpr(vcpu, 4, pte_index | i);
 	ret = H_SUCCESS;
 
@@ -93,7 +97,9 @@ static int kvmppc_h_pr_remove(struct kvm_vcpu *vcpu)
 
 	pteg = get_pteg_addr(vcpu, pte_index);
 	mutex_lock(&vcpu->kvm->arch.hpt_mutex);
-	copy_from_user(pte, (void __user *)pteg, sizeof(pte));
+	ret = H_FUNCTION;
+	if (copy_from_user(pte, (void __user *)pteg, sizeof(pte)))
+		goto done;
 	pte[0] = be64_to_cpu((__force __be64)pte[0]);
 	pte[1] = be64_to_cpu((__force __be64)pte[1]);
 
@@ -103,7 +109,9 @@ static int kvmppc_h_pr_remove(struct kvm_vcpu *vcpu)
 	    ((flags & H_ANDCOND) && (pte[0] & avpn) != 0))
 		goto done;
 
-	copy_to_user((void __user *)pteg, &v, sizeof(v));
+	ret = H_FUNCTION;
+	if (copy_to_user((void __user *)pteg, &v, sizeof(v)))
+		goto done;
 
 	rb = compute_tlbie_rb(pte[0], pte[1], pte_index);
 	vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
@@ -171,7 +179,10 @@ static int kvmppc_h_pr_bulk_remove(struct kvm_vcpu *vcpu)
 		}
 
 		pteg = get_pteg_addr(vcpu, tsh & H_BULK_REMOVE_PTEX);
-		copy_from_user(pte, (void __user *)pteg, sizeof(pte));
+		if (copy_from_user(pte, (void __user *)pteg, sizeof(pte))) {
+			ret = H_FUNCTION;
+			break;
+		}
 		pte[0] = be64_to_cpu((__force __be64)pte[0]);
 		pte[1] = be64_to_cpu((__force __be64)pte[1]);
 
@@ -184,7 +195,10 @@ static int kvmppc_h_pr_bulk_remove(struct kvm_vcpu *vcpu)
 			tsh |= H_BULK_REMOVE_NOT_FOUND;
 		} else {
 			/* Splat the pteg in (userland) hpt */
-			copy_to_user((void __user *)pteg, &v, sizeof(v));
+			if (copy_to_user((void __user *)pteg, &v, sizeof(v))) {
+				ret = H_FUNCTION;
+				break;
+			}
 
 			rb = compute_tlbie_rb(pte[0], pte[1],
 					      tsh & H_BULK_REMOVE_PTEX);
@@ -211,7 +225,9 @@ static int kvmppc_h_pr_protect(struct kvm_vcpu *vcpu)
 
 	pteg = get_pteg_addr(vcpu, pte_index);
 	mutex_lock(&vcpu->kvm->arch.hpt_mutex);
-	copy_from_user(pte, (void __user *)pteg, sizeof(pte));
+	ret = H_FUNCTION;
+	if (copy_from_user(pte, (void __user *)pteg, sizeof(pte)))
+		goto done;
 	pte[0] = be64_to_cpu((__force __be64)pte[0]);
 	pte[1] = be64_to_cpu((__force __be64)pte[1]);
 
@@ -234,7 +250,9 @@ static int kvmppc_h_pr_protect(struct kvm_vcpu *vcpu)
 	vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
 	pte[0] = (__force u64)cpu_to_be64(pte[0]);
 	pte[1] = (__force u64)cpu_to_be64(pte[1]);
-	copy_to_user((void __user *)pteg, pte, sizeof(pte));
+	ret = H_FUNCTION;
+	if (copy_to_user((void __user *)pteg, pte, sizeof(pte)))
+		goto done;
 	ret = H_SUCCESS;
 
  done:
@@ -244,36 +262,37 @@ static int kvmppc_h_pr_protect(struct kvm_vcpu *vcpu)
 	return EMULATE_DONE;
 }
 
-static int kvmppc_h_pr_put_tce(struct kvm_vcpu *vcpu)
+static int kvmppc_h_pr_logical_ci_load(struct kvm_vcpu *vcpu)
 {
-	unsigned long liobn = kvmppc_get_gpr(vcpu, 4);
-	unsigned long ioba = kvmppc_get_gpr(vcpu, 5);
-	unsigned long tce = kvmppc_get_gpr(vcpu, 6);
 	long rc;
 
-	rc = kvmppc_h_put_tce(vcpu, liobn, ioba, tce);
+	rc = kvmppc_h_logical_ci_load(vcpu);
 	if (rc == H_TOO_HARD)
 		return EMULATE_FAIL;
 	kvmppc_set_gpr(vcpu, 3, rc);
 	return EMULATE_DONE;
 }
 
-static int kvmppc_h_pr_logical_ci_load(struct kvm_vcpu *vcpu)
+static int kvmppc_h_pr_logical_ci_store(struct kvm_vcpu *vcpu)
 {
 	long rc;
 
-	rc = kvmppc_h_logical_ci_load(vcpu);
+	rc = kvmppc_h_logical_ci_store(vcpu);
 	if (rc == H_TOO_HARD)
 		return EMULATE_FAIL;
 	kvmppc_set_gpr(vcpu, 3, rc);
 	return EMULATE_DONE;
 }
 
-static int kvmppc_h_pr_logical_ci_store(struct kvm_vcpu *vcpu)
+#ifdef CONFIG_SPAPR_TCE_IOMMU
+static int kvmppc_h_pr_put_tce(struct kvm_vcpu *vcpu)
 {
+	unsigned long liobn = kvmppc_get_gpr(vcpu, 4);
+	unsigned long ioba = kvmppc_get_gpr(vcpu, 5);
+	unsigned long tce = kvmppc_get_gpr(vcpu, 6);
 	long rc;
 
-	rc = kvmppc_h_logical_ci_store(vcpu);
+	rc = kvmppc_h_put_tce(vcpu, liobn, ioba, tce);
 	if (rc == H_TOO_HARD)
 		return EMULATE_FAIL;
 	kvmppc_set_gpr(vcpu, 3, rc);
@@ -311,6 +330,23 @@ static int kvmppc_h_pr_stuff_tce(struct kvm_vcpu *vcpu)
 	return EMULATE_DONE;
 }
 
+#else /* CONFIG_SPAPR_TCE_IOMMU */
+static int kvmppc_h_pr_put_tce(struct kvm_vcpu *vcpu)
+{
+	return EMULATE_FAIL;
+}
+
+static int kvmppc_h_pr_put_tce_indirect(struct kvm_vcpu *vcpu)
+{
+	return EMULATE_FAIL;
+}
+
+static int kvmppc_h_pr_stuff_tce(struct kvm_vcpu *vcpu)
+{
+	return EMULATE_FAIL;
+}
+#endif /* CONFIG_SPAPR_TCE_IOMMU */
+
 static int kvmppc_h_pr_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd)
 {
 	long rc = kvmppc_xics_hcall(vcpu, cmd);
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index f7cf2cd..7f71ab5 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -1749,7 +1749,7 @@ long kvm_arch_vm_ioctl(struct file *filp,
 		r = kvm_vm_ioctl_enable_cap(kvm, &cap);
 		break;
 	}
-#ifdef CONFIG_PPC_BOOK3S_64
+#ifdef CONFIG_SPAPR_TCE_IOMMU
 	case KVM_CREATE_SPAPR_TCE_64: {
 		struct kvm_create_spapr_tce_64 create_tce_64;
 
@@ -1780,6 +1780,8 @@ long kvm_arch_vm_ioctl(struct file *filp,
 		r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
 		goto out;
 	}
+#endif
+#ifdef CONFIG_PPC_BOOK3S_64
 	case KVM_PPC_GET_SMMU_INFO: {
 		struct kvm_ppc_smmu_info info;
 		struct kvm *kvm = filp->private_data;