From: Alexander Graf Date: Thu, 10 Jul 2014 17:22:03 +0000 (+0200) Subject: KVM: PPC: Book3S: Stop PTE lookup on write errors X-Git-Tag: v3.17-rc1~87^2~10^2~37 X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=2e27ecc961044a2c5c05a4283888352961886a87;p=~emulex%2Finfiniband.git KVM: PPC: Book3S: Stop PTE lookup on write errors 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 --- diff --git a/arch/powerpc/kvm/book3s_32_mmu.c b/arch/powerpc/kvm/book3s_32_mmu.c index 93503bbdae4..cd0b0730e29 100644 --- a/arch/powerpc/kvm/book3s_32_mmu.c +++ b/arch/powerpc/kvm/book3s_32_mmu.c @@ -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);