diff options
| author |   Ben Gardon <bgardon@google.com> | 2020-10-14 11:26:58 -0700 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2020-10-23 03:42:15 -0400 |
| commit | 95fb5b0258b7bd2d540102771e31cfd76b72aa7b (patch) | |
| tree | 7ed43566385df887a20395e373948f87e32ac6f9 /arch/x86/kvm/mmu/tdp_mmu.h | |
| parent | kvm: x86/mmu: Support write protection for nesting in tdp MMU (diff) | |
| download | linux-dev-95fb5b0258b7bd2d540102771e31cfd76b72aa7b.tar.xz linux-dev-95fb5b0258b7bd2d540102771e31cfd76b72aa7b.zip | |
kvm: x86/mmu: Support MMIO in the TDP MMU
In order to support MMIO, KVM must be able to walk the TDP paging
structures to find mappings for a given GFN. Support this walk for
the TDP MMU.
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
v2: Thanks to Dan Carpenter and kernel test robot for finding that root
was used uninitialized in get_mmio_spte.
Signed-off-by: Ben Gardon <bgardon@google.com>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Message-Id: <20201014182700.2888246-19-bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to '')
| -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 6501dd2ef8e4..556e065503f6 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.h +++ b/arch/x86/kvm/mmu/tdp_mmu.h @@ -43,4 +43,6 @@ void kvm_tdp_mmu_zap_collapsible_sptes(struct kvm *kvm, bool kvm_tdp_mmu_write_protect_gfn(struct kvm *kvm, struct kvm_memory_slot *slot, gfn_t gfn); + +int kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes); #endif /* __KVM_X86_MMU_TDP_MMU_H */ |