2 files changed, 11 insertions, 1 deletions

diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index e894515e77bb..39aa97d3ff88 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -186,7 +186,7 @@ hardware_interrupt_hv:
         KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x800)
 
         MASKABLE_EXCEPTION_PSERIES(0x900, 0x900, decrementer)
-        MASKABLE_EXCEPTION_HV(0x980, 0x982, decrementer)
+        STD_EXCEPTION_HV(0x980, 0x982, hdecrementer)
 
         STD_EXCEPTION_PSERIES(0xa00, 0xa00, trap_0a)
         KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xa00)
@@ -486,6 +486,7 @@ machine_check_common:
 
         STD_EXCEPTION_COMMON_ASYNC(0x500, hardware_interrupt, do_IRQ)
         STD_EXCEPTION_COMMON_ASYNC(0x900, decrementer, .timer_interrupt)
+        STD_EXCEPTION_COMMON(0x980, hdecrementer, .hdec_interrupt)
         STD_EXCEPTION_COMMON(0xa00, trap_0a, .unknown_exception)
         STD_EXCEPTION_COMMON(0xb00, trap_0b, .unknown_exception)
         STD_EXCEPTION_COMMON(0xd00, single_step, .single_step_exception)
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index be171ee73bf8..e49e93191b69 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -535,6 +535,15 @@ void timer_interrupt(struct pt_regs * regs)
         trace_timer_interrupt_exit(regs);
 }
 
+/*
+ * Hypervisor decrementer interrupts shouldn't occur but are sometimes
+ * left pending on exit from a KVM guest.  We don't need to do anything
+ * to clear them, as they are edge-triggered.
+ */
+void hdec_interrupt(struct pt_regs *regs)
+{
+}
+
 #ifdef CONFIG_SUSPEND
 static void generic_suspend_disable_irqs(void)
 {