Commit 17824b5a authored Jul 10, 2014 by Alexander Graf

KVM: PPC: Deflect page write faults properly in kvmppc_st

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>

parent 1287cb3f

arch/powerpc/kvm/book3s.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -418,11 +418,13 @@ 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, true, &pte))
		return -ENOENT;
		r = kvmppc_xlate(vcpu, *eaddr, data, true, &pte);
		if (r < 0)
		return r;

		*eaddr = pte.raddr;