KVM: PPC: Move kvmppc_ld/st to common code
We have enough common infrastructure now to resolve GVA->GPA mappings at
runtime. With this we can move our book3s specific helpers to load / store
in guest virtual address space to common code as well.
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index eaa57da..2c5a1c3 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -309,6 +309,87 @@
}
EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
+static hva_t kvmppc_bad_hva(void)
+{
+ return PAGE_OFFSET;
+}
+
+static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
+{
+ hva_t hpage;
+
+ hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
+ if (kvm_is_error_hva(hpage))
+ goto err;
+
+ return hpage | (pte->raddr & ~PAGE_MASK);
+err:
+ return kvmppc_bad_hva();
+}
+
+int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
+ bool data)
+{
+ struct kvmppc_pte pte;
+ int r;
+
+ vcpu->stat.st++;
+
+ r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
+ XLATE_WRITE, &pte);
+ if (r < 0)
+ return r;
+
+ *eaddr = pte.raddr;
+
+ if (!pte.may_write)
+ return -EPERM;
+
+ if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
+ return EMULATE_DO_MMIO;
+
+ return EMULATE_DONE;
+}
+EXPORT_SYMBOL_GPL(kvmppc_st);
+
+int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
+ bool data)
+{
+ struct kvmppc_pte pte;
+ hva_t hva = *eaddr;
+ int rc;
+
+ vcpu->stat.ld++;
+
+ rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
+ XLATE_READ, &pte);
+ if (rc)
+ return rc;
+
+ *eaddr = pte.raddr;
+
+ if (!pte.may_read)
+ return -EPERM;
+
+ if (!data && !pte.may_execute)
+ return -ENOEXEC;
+
+ hva = kvmppc_pte_to_hva(vcpu, &pte);
+ if (kvm_is_error_hva(hva))
+ goto mmio;
+
+ if (copy_from_user(ptr, (void __user *)hva, size)) {
+ printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
+ goto mmio;
+ }
+
+ return EMULATE_DONE;
+
+mmio:
+ return EMULATE_DO_MMIO;
+}
+EXPORT_SYMBOL_GPL(kvmppc_ld);
+
int kvm_arch_hardware_enable(void *garbage)
{
return 0;