1 files changed, 5 insertions, 2 deletions

diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index ba4bfb7f6a36..5c93a65ee1e5 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -457,6 +457,7 @@ static void __send_ipi_mask(const struct cpumask *mask, int vector)
 #else
         u64 ipi_bitmap = 0;
 #endif
+        long ret;
 
         if (cpumask_empty(mask))
                 return;
@@ -482,8 +483,9 @@ static void __send_ipi_mask(const struct cpumask *mask, int vector)
                 } else if (apic_id < min + KVM_IPI_CLUSTER_SIZE) {
                         max = apic_id < max ? max : apic_id;
                 } else {
-                        kvm_hypercall4(KVM_HC_SEND_IPI, (unsigned long)ipi_bitmap,
+                        ret = kvm_hypercall4(KVM_HC_SEND_IPI, (unsigned long)ipi_bitmap,
                                 (unsigned long)(ipi_bitmap >> BITS_PER_LONG), min, icr);
+                        WARN_ONCE(ret < 0, "KVM: failed to send PV IPI: %ld", ret);
                         min = max = apic_id;
                         ipi_bitmap = 0;
                 }
@@ -491,8 +493,9 @@ static void __send_ipi_mask(const struct cpumask *mask, int vector)
         }
 
         if (ipi_bitmap) {
-                kvm_hypercall4(KVM_HC_SEND_IPI, (unsigned long)ipi_bitmap,
+                ret = kvm_hypercall4(KVM_HC_SEND_IPI, (unsigned long)ipi_bitmap,
                         (unsigned long)(ipi_bitmap >> BITS_PER_LONG), min, icr);
+                WARN_ONCE(ret < 0, "KVM: failed to send PV IPI: %ld", ret);
         }
 
         local_irq_restore(flags);