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KVM: PPC: Deflect page write faults properly in kvmppc_st

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When we have a page that we're not allowed to write to, xlate() will already
tell us -EPERM on lookup of that page. With the code as is we change it into
a "page missing" error which a guest may get confused about. Instead, just
tell the caller about the -EPERM directly.

This fixes Mac OS X guests when run with DCBZ32 emulation.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf
2014-07-10 19:19:35 +02:00
parent 1287cb3fa8
commit 17824b5afc
1 changed files with 4 additions and 2 deletions
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6
arch/powerpc/kvm/book3s.c
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@@ -418,11 +418,13 @@ int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
bool data) bool data)
{ {
struct kvmppc_pte pte; struct kvmppc_pte pte;
int r;
vcpu->stat.st++; vcpu->stat.st++;
if (kvmppc_xlate(vcpu, *eaddr, data, true, &pte)) r = kvmppc_xlate(vcpu, *eaddr, data, true, &pte);
return -ENOENT; if (r < 0)
return r;
*eaddr = pte.raddr; *eaddr = pte.raddr;