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KVM: PPC: Book3S: Stop PTE lookup on write errors

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When a page lookup failed because we're not allowed to write to the page, we
should not overwrite that value with another lookup on the second PTEG which
will return "page not found". Instead, we should just tell the caller that we
had a permission problem.

This fixes Mac OS X guests looping endlessly in page lookup code for me.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2014-07-10 19:22:03 +02:00
parent 17824b5afc
commit 2e27ecc961
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/kvm/book3s_32_mmu.c
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@ -335,7 +335,7 @@ static int kvmppc_mmu_book3s_32_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
if (r < 0)
r = kvmppc_mmu_book3s_32_xlate_pte(vcpu, eaddr, pte,
data, iswrite, true);
if (r < 0)
if (r == -ENOENT)
r = kvmppc_mmu_book3s_32_xlate_pte(vcpu, eaddr, pte,
data, iswrite, false);