We have a condition in the ppc64 host mmu code that should never occur.
Unfortunately, it just did happen to me and I was rather puzzled on why,
because BUG_ON doesn't tell me anything useful.
So let's add some more debug output in case this goes wrong. Also change
BUG to WARN, since I don't want to reboot every time I mess something up.
Signed-off-by: Alexander Graf <agraf@xxxxxxx>
---
arch/powerpc/kvm/book3s_64_mmu_host.c | 9 +++++++--
1 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_64_mmu_host.c b/arch/powerpc/kvm/book3s_64_mmu_host.c
index 41af12f..5bf91a7 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_host.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_host.c
@@ -231,10 +231,15 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte)
vcpu->arch.mmu.esid_to_vsid(vcpu, orig_pte->eaddr >> SID_SHIFT, &vsid);
map = find_sid_vsid(vcpu, vsid);
if (!map) {
- kvmppc_mmu_map_segment(vcpu, orig_pte->eaddr);
+ ret = kvmppc_mmu_map_segment(vcpu, orig_pte->eaddr);
+ WARN_ON(ret < 0);
map = find_sid_vsid(vcpu, vsid);
}
- BUG_ON(!map);
+ if (!map) {
+ printk(KERN_ERR "KVM: Segment map for 0x%llx (0x%lx) failed\n",
+ vsid, orig_pte->eaddr);
+ WARN();
+ }
vsid = map->host_vsid;
va = hpt_va(orig_pte->eaddr, vsid, MMU_SEGSIZE_256M);
--
1.6.0.2
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
