diff options
| author |   Sean Christopherson <seanjc@google.com> | 2022-02-26 00:15:36 +0000 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2022-03-08 09:31:56 -0500 |
| commit | bd29677952fa96bf1f1fc31203aaad628a32bdb6 (patch) | |
| tree | c12a6366942db0885bdadf7245734c024b0ad1dd | |
| parent | KVM: x86/mmu: Zap only TDP MMU leafs in kvm_zap_gfn_range() (diff) | |
| download | linux-dev-bd29677952fa96bf1f1fc31203aaad628a32bdb6.tar.xz linux-dev-bd29677952fa96bf1f1fc31203aaad628a32bdb6.zip | |
KVM: x86/mmu: Do remote TLB flush before dropping RCU in TDP MMU resched
When yielding in the TDP MMU iterator, service any pending TLB flush
before dropping RCU protections in anticipation of using the caller's RCU
"lock" as a proxy for vCPUs in the guest.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Ben Gardon <bgardon@google.com>
Message-Id: <20220226001546.360188-19-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/mmu/tdp_mmu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index c71debdbc732..3a866fcb5ea9 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -716,11 +716,11 @@ static inline bool __must_check tdp_mmu_iter_cond_resched(struct kvm *kvm, return false; if (need_resched() || rwlock_needbreak(&kvm->mmu_lock)) { - rcu_read_unlock(); - if (flush) kvm_flush_remote_tlbs(kvm); + rcu_read_unlock(); + if (shared) cond_resched_rwlock_read(&kvm->mmu_lock); else |