diff options
| author | Ben Gardon <bgardon@google.com> | 2020-10-14 11:26:57 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-10-23 03:42:14 -0400 |
| commit | 46044f72c3826b7528339f454fe8900bae6adaaa (patch) | |
| tree | a179ff355799beb92f372ebbc69ea8fee5ef529f /arch/x86/kvm/mmu/tdp_mmu.h | |
| parent | 14881998566d2dc0703870bbe063e8d42d780eb9 (diff) | |
| download | linux-46044f72c3826b7528339f454fe8900bae6adaaa.tar.bz2 | |
kvm: x86/mmu: Support write protection for nesting in tdp MMU
To support nested virtualization, KVM will sometimes need to write
protect pages which are part of a shadowed paging structure or are not
writable in the shadowed paging structure. Add a function to write
protect GFN mappings for this purpose.
Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell
machine. This series introduced no new failures.
This series can be viewed in Gerrit at:
https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538
Signed-off-by: Ben Gardon <bgardon@google.com>
Message-Id: <20201014182700.2888246-18-bgardon@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 | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu/tdp_mmu.h b/arch/x86/kvm/mmu/tdp_mmu.h index 8cc902b8b9f8..6501dd2ef8e4 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.h +++ b/arch/x86/kvm/mmu/tdp_mmu.h @@ -40,4 +40,7 @@ void kvm_tdp_mmu_clear_dirty_pt_masked(struct kvm *kvm, bool kvm_tdp_mmu_slot_set_dirty(struct kvm *kvm, struct kvm_memory_slot *slot); void kvm_tdp_mmu_zap_collapsible_sptes(struct kvm *kvm, const struct kvm_memory_slot *slot); + +bool kvm_tdp_mmu_write_protect_gfn(struct kvm *kvm, + struct kvm_memory_slot *slot, gfn_t gfn); #endif /* __KVM_X86_MMU_TDP_MMU_H */ |