KVM: PPC: E500: Explicitly mark shadow maps invalid

When we invalidate shadow TLB maps on the host, we don't mark them
as not valid. But we should.

Fix this by removing the E500_TLB_VALID from their flags when
invalidating.

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

1 files changed, 10 insertions, 3 deletions

diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c
index d38ad63fdcb9..8efb2acee2bf 100644
--- a/arch/powerpc/kvm/e500_tlb.c
+++ b/arch/powerpc/kvm/e500_tlb.c
@@ -204,9 +204,13 @@ static void inval_gtlbe_on_host(struct kvmppc_vcpu_e500 *vcpu_e500,
 {
         struct kvm_book3e_206_tlb_entry *gtlbe =
                 get_entry(vcpu_e500, tlbsel, esel);
+        struct tlbe_ref *ref = &vcpu_e500->gtlb_priv[tlbsel][esel].ref;
 
-        if (tlbsel == 1 &&
-            vcpu_e500->gtlb_priv[1][esel].ref.flags & E500_TLB_BITMAP) {
+        /* Don't bother with unmapped entries */
+        if (!(ref->flags & E500_TLB_VALID))
+                return;
+
+        if (tlbsel == 1 && ref->flags & E500_TLB_BITMAP) {
                 u64 tmp = vcpu_e500->g2h_tlb1_map[esel];
                 int hw_tlb_indx;
                 unsigned long flags;
@@ -224,7 +228,7 @@ static void inval_gtlbe_on_host(struct kvmppc_vcpu_e500 *vcpu_e500,
                 }
                 mb();
                 vcpu_e500->g2h_tlb1_map[esel] = 0;
-                vcpu_e500->gtlb_priv[1][esel].ref.flags &= ~E500_TLB_BITMAP;
+                ref->flags &= ~(E500_TLB_BITMAP | E500_TLB_VALID);
                 local_irq_restore(flags);
 
                 return;
@@ -232,6 +236,9 @@ static void inval_gtlbe_on_host(struct kvmppc_vcpu_e500 *vcpu_e500,
 
         /* Guest tlbe is backed by at most one host tlbe per shadow pid. */
         kvmppc_e500_tlbil_one(vcpu_e500, gtlbe);
+
+        /* Mark the TLB as not backed by the host anymore */
+        ref->flags &= ~E500_TLB_VALID;
 }
 
 static int tlb0_set_base(gva_t addr, int sets, int ways)