Commit 65acb891 authored by Radim Krčmář's avatar Radim Krčmář
Browse files

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
parents 2ea659a9 76d837a4

arch/powerpc/kvm/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -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.

arch/powerpc/kvm/Makefile

+2 −2
Original line number Diff line number Diff line
@@ -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)

arch/powerpc/kvm/book3s_64_vio_hv.c

+13 −0
Original line number Diff line number Diff line
@@ -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)

{

arch/powerpc/kvm/book3s_hv_builtin.c

+8 −1
Original line number Diff line number Diff line
@@ -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;

arch/powerpc/kvm/book3s_pr_papr.c

+53 −17
Original line number Diff line number Diff line
@@ -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);

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