From f142e5eeb724cfbedd203b32b3b542d78dbe2545 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Tue, 11 Jun 2013 18:05:25 +0100 Subject: [PATCH] arm64: KVM: add missing dsb before invalidating Stage-2 TLBs When performing a Stage-2 TLB invalidation, it is necessary to make sure the write to the page tables is observable by all CPUs. For this purpose, add dsb instructions to __kvm_tlb_flush_vmid_ipa and __kvm_flush_vm_context before doing the TLB invalidation itself. Signed-off-by: Marc Zyngier --- arch/arm64/kvm/hyp.S | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/kvm/hyp.S b/arch/arm64/kvm/hyp.S index 218802f68b20..1ac0bbbdddb2 100644 --- a/arch/arm64/kvm/hyp.S +++ b/arch/arm64/kvm/hyp.S @@ -604,6 +604,8 @@ END(__kvm_vcpu_run) // void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa); ENTRY(__kvm_tlb_flush_vmid_ipa) + dsb ishst + kern_hyp_va x0 ldr x2, [x0, #KVM_VTTBR] msr vttbr_el2, x2 @@ -625,6 +627,7 @@ ENTRY(__kvm_tlb_flush_vmid_ipa) ENDPROC(__kvm_tlb_flush_vmid_ipa) ENTRY(__kvm_flush_vm_context) + dsb ishst tlbi alle1is ic ialluis dsb sy -- 2.34.1