From: Alexander Graf <agraf@suse.de>
Date: Thu, 2 Aug 2012 11:38:49 +0000 (+0200)
Subject: KVM: PPC: E500: Fix clear_tlb_refs
X-Git-Tag: next-20120925~30^2~37
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=77b08ec8fab44ab2b821daeb947e1e2cce541023;p=karo-tx-linux.git

KVM: PPC: E500: Fix clear_tlb_refs

Our mapping code assumes that TLB0 entries are always mapped. However, after
calling clear_tlb_refs() this is no longer the case.

Map them dynamically if we find an entry unmapped in TLB0.

Signed-off-by: Alexander Graf <agraf@suse.de>
---

diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c
index ff38b664195d..b56b6e14df6c 100644
--- a/arch/powerpc/kvm/e500_tlb.c
+++ b/arch/powerpc/kvm/e500_tlb.c
@@ -1039,8 +1039,12 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr,
 		sesel = 0; /* unused */
 		priv = &vcpu_e500->gtlb_priv[tlbsel][esel];
 
-		kvmppc_e500_setup_stlbe(vcpu, gtlbe, BOOK3E_PAGESZ_4K,
-					&priv->ref, eaddr, &stlbe);
+		/* Only triggers after clear_tlb_refs */
+		if (unlikely(!(priv->ref.flags & E500_TLB_VALID)))
+			kvmppc_e500_tlb0_map(vcpu_e500, esel, &stlbe);
+		else
+			kvmppc_e500_setup_stlbe(vcpu, gtlbe, BOOK3E_PAGESZ_4K,
+						&priv->ref, eaddr, &stlbe);
 		break;
 
 	case 1: {