1 files changed, 10 insertions, 1 deletions

diff --git a/arch/powerpc/kvm/booke_interrupts.S b/arch/powerpc/kvm/booke_interrupts.S
index 3b653b5309b8..8eaba2613ffd 100644
--- a/arch/powerpc/kvm/booke_interrupts.S
+++ b/arch/powerpc/kvm/booke_interrupts.S
@@ -42,7 +42,8 @@
 #define HOST_STACK_LR   (HOST_STACK_SIZE + 4) /* In caller stack frame. */
 
 #define NEED_INST_MASK ((1<<BOOKE_INTERRUPT_PROGRAM) | \
-                        (1<<BOOKE_INTERRUPT_DTLB_MISS))
+                        (1<<BOOKE_INTERRUPT_DTLB_MISS) | \
+                        (1<<BOOKE_INTERRUPT_DEBUG))
 
 #define NEED_DEAR_MASK ((1<<BOOKE_INTERRUPT_DATA_STORAGE) | \
                         (1<<BOOKE_INTERRUPT_DTLB_MISS))
@@ -431,6 +432,14 @@ lightweight_exit:
         oris    r3, r3, KVMPPC_MSR_MASK@h
         ori     r3, r3, KVMPPC_MSR_MASK@l
         mtsrr1  r3
+
+        /* Clear any debug events which occurred since we disabled MSR[DE].
+         * XXX This gives us a 3-instruction window in which a breakpoint
+         * intended for guest context could fire in the host instead. */
+        lis     r3, 0xffff
+        ori     r3, r3, 0xffff
+        mtspr   SPRN_DBSR, r3
+
         lwz     r3, VCPU_GPR(r3)(r4)
         lwz     r4, VCPU_GPR(r4)(r4)
         rfi