[PATCH v2 16/20] KVM: PPC: Book3S HV: Make HPT-specific hypercalls return error in radix mode
Paul Mackerras
paulus at ozlabs.org
Mon Jan 30 21:21:49 AEDT 2017
If the guest is in radix mode, then it doesn't have a hashed page
table (HPT), so all of the hypercalls that manipulate the HPT can't
work and should return an error. This adds checks to make them
return H_FUNCTION ("function not supported").
Signed-off-by: Paul Mackerras <paulus at ozlabs.org>
---
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
index 9ef3c4b..6c1ac3d 100644
--- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
+++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
@@ -182,6 +182,8 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
unsigned long mmu_seq;
unsigned long rcbits, irq_flags = 0;
+ if (kvm_is_radix(kvm))
+ return H_FUNCTION;
psize = hpte_page_size(pteh, ptel);
if (!psize)
return H_PARAMETER;
@@ -458,6 +460,8 @@ long kvmppc_do_h_remove(struct kvm *kvm, unsigned long flags,
struct revmap_entry *rev;
u64 pte, orig_pte, pte_r;
+ if (kvm_is_radix(kvm))
+ return H_FUNCTION;
if (pte_index >= kvm->arch.hpt_npte)
return H_PARAMETER;
hpte = (__be64 *)(kvm->arch.hpt_virt + (pte_index << 4));
@@ -529,6 +533,8 @@ long kvmppc_h_bulk_remove(struct kvm_vcpu *vcpu)
struct revmap_entry *rev, *revs[4];
u64 hp0, hp1;
+ if (kvm_is_radix(kvm))
+ return H_FUNCTION;
global = global_invalidates(kvm, 0);
for (i = 0; i < 4 && ret == H_SUCCESS; ) {
n = 0;
@@ -642,6 +648,8 @@ long kvmppc_h_protect(struct kvm_vcpu *vcpu, unsigned long flags,
unsigned long v, r, rb, mask, bits;
u64 pte_v, pte_r;
+ if (kvm_is_radix(kvm))
+ return H_FUNCTION;
if (pte_index >= kvm->arch.hpt_npte)
return H_PARAMETER;
@@ -711,6 +719,8 @@ long kvmppc_h_read(struct kvm_vcpu *vcpu, unsigned long flags,
int i, n = 1;
struct revmap_entry *rev = NULL;
+ if (kvm_is_radix(kvm))
+ return H_FUNCTION;
if (pte_index >= kvm->arch.hpt_npte)
return H_PARAMETER;
if (flags & H_READ_4) {
@@ -750,6 +760,8 @@ long kvmppc_h_clear_ref(struct kvm_vcpu *vcpu, unsigned long flags,
unsigned long *rmap;
long ret = H_NOT_FOUND;
+ if (kvm_is_radix(kvm))
+ return H_FUNCTION;
if (pte_index >= kvm->arch.hpt_npte)
return H_PARAMETER;
@@ -796,6 +808,8 @@ long kvmppc_h_clear_mod(struct kvm_vcpu *vcpu, unsigned long flags,
unsigned long *rmap;
long ret = H_NOT_FOUND;
+ if (kvm_is_radix(kvm))
+ return H_FUNCTION;
if (pte_index >= kvm->arch.hpt_npte)
return H_PARAMETER;
--
2.7.4
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