KVM: PPC: Use kvm_read_guest in kvmppc_ld
We have a nice and handy helper to read from guest physical address space,
so we should make use of it in kvmppc_ld as we already do for its counterpart
in kvmppc_st.
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 3d59730..be40886 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -309,19 +309,6 @@
}
EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
-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 KVM_HVA_ERR_BAD;
-}
-
int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
bool data)
{
@@ -351,7 +338,6 @@
bool data)
{
struct kvmppc_pte pte;
- hva_t hva = *eaddr;
int rc;
vcpu->stat.ld++;
@@ -369,19 +355,10 @@
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;
- }
+ if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
+ return EMULATE_DO_MMIO;
return EMULATE_DONE;
-
-mmio:
- return EMULATE_DO_MMIO;
}
EXPORT_SYMBOL_GPL(kvmppc_ld);