diff mbox series

[V3,6/13] KVM/MMU: Flush tlb directly in kvm_mmu_zap_collapsible_spte()

Message ID 20180927034829.2230-7-Tianyu.Lan@microsoft.com (mailing list archive)
State New, archived
Headers show
Series x86/KVM/Hyper-v: Add HV ept tlb range flush hypercall support in KVM | expand

Commit Message

Tianyu Lan Sept. 27, 2018, 3:49 a.m. UTC 
kvm_mmu_zap_collapsible_spte() returns flush request to the
slot_handle_leaf() and the latter does flush on demand. When
range flush is available, make kvm_mmu_zap_collapsible_spte()
to flush tlb with range directly to avoid returning range back
to slot_handle_leaf().

Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
---
 arch/x86/kvm/mmu.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index f24101ef763e..7c508c4bd204 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -5674,7 +5674,13 @@  static bool kvm_mmu_zap_collapsible_spte(struct kvm *kvm,
 			!kvm_is_reserved_pfn(pfn) &&
 			PageTransCompoundMap(pfn_to_page(pfn))) {
 			drop_spte(kvm, sptep);
-			need_tlb_flush = 1;
+
+			if (kvm_available_flush_tlb_with_range())
+				kvm_flush_remote_tlbs_with_address(kvm, sp->gfn,
+					KVM_PAGES_PER_HPAGE(sp->role.level));
+			else
+				need_tlb_flush = 1;
+
 			goto restart;
 		}
 	}