diff options
| author | David Matlack <dmatlack@google.com> | 2021-07-13 22:09:55 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-08-02 11:01:47 -0400 |
| commit | 6e8eb2060cc7fbc4d388d0ab70502e265aec98c6 (patch) | |
| tree | 4fc2f7b1c24d67326f40bccf4e7715d9846b5236 /arch/x86/kvm/mmu/tdp_mmu.h | |
| parent | c5c8c7c53004cb70715320018c3b4287071c1cfd (diff) | |
| download | linux-6e8eb2060cc7fbc4d388d0ab70502e265aec98c6.tar.bz2 | |
KVM: x86/mmu: fast_page_fault support for the TDP MMU
Make fast_page_fault interoperate with the TDP MMU by leveraging
walk_shadow_page_lockless_{begin,end} to acquire the RCU read lock and
introducing a new helper function kvm_tdp_mmu_fast_pf_get_last_sptep to
grab the lowest level sptep.
Suggested-by: Ben Gardon <bgardon@google.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20210713220957.3493520-5-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu/tdp_mmu.h')
| -rw-r--r-- | arch/x86/kvm/mmu/tdp_mmu.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu/tdp_mmu.h b/arch/x86/kvm/mmu/tdp_mmu.h index 93e1bf5089c4..361b47f98cc5 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.h +++ b/arch/x86/kvm/mmu/tdp_mmu.h @@ -89,6 +89,8 @@ static inline void kvm_tdp_mmu_walk_lockless_end(void) int kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes, int *root_level); +u64 *kvm_tdp_mmu_fast_pf_get_last_sptep(struct kvm_vcpu *vcpu, u64 addr, + u64 *spte); #ifdef CONFIG_X86_64 bool kvm_mmu_init_tdp_mmu(struct kvm *kvm); |