diff options
Diffstat (limited to 'arch/x86/kvm/mmu/mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu/mmu.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index edc852ca3fb9..43f92b111d7b 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -5094,6 +5094,14 @@ int kvm_mmu_load(struct kvm_vcpu *vcpu) kvm_mmu_sync_roots(vcpu); kvm_mmu_load_pgd(vcpu); + + /* + * Flush any TLB entries for the new root, the provenance of the root + * is unknown. Even if KVM ensures there are no stale TLB entries + * for a freed root, in theory another hypervisor could have left + * stale entries. Flushing on alloc also allows KVM to skip the TLB + * flush when freeing a root (see kvm_tdp_mmu_put_root()). + */ static_call(kvm_x86_flush_tlb_current)(vcpu); out: return r; |