The kvmppc_xlate() helper will already error out with good error codes, such as
-ENOENT or -EPERM. Deflect them onto our callers in kvmppc_ld/st so they know
what's going on.
While at it, remove the superfluous check on pte->may_write. The xlate function
already checks this.
Signed-off-by: Alexander Graf <agraf@xxxxxxx>
---
arch/powerpc/kvm/powerpc.c | 21 ++++++++++-----------
1 file changed, 10 insertions(+), 11 deletions(-)
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index e25ce60..c5dbc66 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -308,18 +308,17 @@ int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
bool data)
{
struct kvmppc_pte pte;
+ int r;
vcpu->stat.st++;
- if (kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
- XLATE_WRITE, &pte))
- return -ENOENT;
+ r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
+ XLATE_WRITE, &pte);
+ if (r)
+ 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;
@@ -332,12 +331,14 @@ int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
{
struct kvmppc_pte pte;
hva_t hva = *eaddr;
+ int r;
vcpu->stat.ld++;
- if (kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
- XLATE_READ, &pte))
- goto nopte;
+ r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
+ XLATE_READ, &pte);
+ if (r)
+ return r;
*eaddr = pte.raddr;
@@ -352,8 +353,6 @@ int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
return EMULATE_DONE;
-nopte:
- return -ENOENT;
mmio:
return EMULATE_DO_MMIO;
}
--
1.8.1.4
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