From a5c214dad1985092bd21c38c2a78befed9b02294 Mon Sep 17 00:00:00 2001 From: Lan Tianyu Date: Sat, 13 Oct 2018 22:54:05 +0800 Subject: [PATCH] KVM/VMX: Change hv flush logic when ept tables are mismatched. If ept table pointers are mismatched, flushing tlb for each vcpus via hv flush interface still helps to reduce vmexits which are triggered by IPI and INEPT emulation. Signed-off-by: Lan Tianyu Signed-off-by: Paolo Bonzini --- arch/x86/kvm/vmx.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 0050fe81d857..a9ed7a723a0c 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1571,7 +1571,8 @@ static void check_ept_pointer_match(struct kvm *kvm) static int vmx_hv_remote_flush_tlb(struct kvm *kvm) { - int ret; + struct kvm_vcpu *vcpu; + int ret = -ENOTSUPP, i; spin_lock(&to_kvm_vmx(kvm)->ept_pointer_lock); @@ -1579,14 +1580,14 @@ static int vmx_hv_remote_flush_tlb(struct kvm *kvm) check_ept_pointer_match(kvm); if (to_kvm_vmx(kvm)->ept_pointers_match != EPT_POINTERS_MATCH) { - ret = -ENOTSUPP; - goto out; + kvm_for_each_vcpu(i, vcpu, kvm) + ret |= hyperv_flush_guest_mapping( + to_vmx(kvm_get_vcpu(kvm, i))->ept_pointer); + } else { + ret = hyperv_flush_guest_mapping( + to_vmx(kvm_get_vcpu(kvm, 0))->ept_pointer); } - ret = hyperv_flush_guest_mapping( - to_vmx(kvm_get_vcpu(kvm, 0))->ept_pointer); - -out: spin_unlock(&to_kvm_vmx(kvm)->ept_pointer_lock); return ret; } -- 2.30.2