Signed-off-by: Avi Kivity <[email protected]>
---
drivers/kvm/kvm.h | 1 +
drivers/kvm/kvm_main.c | 3 +++
drivers/kvm/x86.c | 1 +
3 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index b65f5de..048849d 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -300,6 +300,7 @@ struct kvm_vm_stat {
u32 mmu_pde_zapped;
u32 mmu_flooded;
u32 mmu_recycled;
+ u32 remote_tlb_flush;
};
struct kvm {
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index d99396b..411b2bd 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -115,6 +115,9 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
if (cpu != -1 && cpu != raw_smp_processor_id())
cpu_set(cpu, cpus);
}
+ if (cpus_empty(cpus))
+ return;
+ ++kvm->stat.remote_tlb_flush;
smp_call_function_mask(cpus, ack_flush, NULL, 1);
}
diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c
index b482b6a..ac09f38 100644
--- a/drivers/kvm/x86.c
+++ b/drivers/kvm/x86.c
@@ -73,6 +73,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) },
{ "mmu_flooded", VM_STAT(mmu_flooded) },
{ "mmu_recycled", VM_STAT(mmu_recycled) },
+ { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
{ NULL }
};
--
1.5.3.7
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