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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>
49 lines
1.7 KiB
C
49 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef __KVM_X86_MMU_TDP_MMU_H
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#define __KVM_X86_MMU_TDP_MMU_H
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#include <linux/kvm_host.h>
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void kvm_mmu_init_tdp_mmu(struct kvm *kvm);
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void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm);
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bool is_tdp_mmu_root(struct kvm *kvm, hpa_t root);
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hpa_t kvm_tdp_mmu_get_vcpu_root_hpa(struct kvm_vcpu *vcpu);
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void kvm_tdp_mmu_free_root(struct kvm *kvm, struct kvm_mmu_page *root);
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bool kvm_tdp_mmu_zap_gfn_range(struct kvm *kvm, gfn_t start, gfn_t end);
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void kvm_tdp_mmu_zap_all(struct kvm *kvm);
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int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code,
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int map_writable, int max_level, kvm_pfn_t pfn,
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bool prefault);
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int kvm_tdp_mmu_zap_hva_range(struct kvm *kvm, unsigned long start,
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unsigned long end);
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int kvm_tdp_mmu_age_hva_range(struct kvm *kvm, unsigned long start,
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unsigned long end);
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int kvm_tdp_mmu_test_age_hva(struct kvm *kvm, unsigned long hva);
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int kvm_tdp_mmu_set_spte_hva(struct kvm *kvm, unsigned long address,
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pte_t *host_ptep);
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bool kvm_tdp_mmu_wrprot_slot(struct kvm *kvm, struct kvm_memory_slot *slot,
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int min_level);
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bool kvm_tdp_mmu_clear_dirty_slot(struct kvm *kvm,
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struct kvm_memory_slot *slot);
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void kvm_tdp_mmu_clear_dirty_pt_masked(struct kvm *kvm,
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struct kvm_memory_slot *slot,
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gfn_t gfn, unsigned long mask,
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bool wrprot);
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bool kvm_tdp_mmu_slot_set_dirty(struct kvm *kvm, struct kvm_memory_slot *slot);
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void kvm_tdp_mmu_zap_collapsible_sptes(struct kvm *kvm,
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const struct kvm_memory_slot *slot);
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bool kvm_tdp_mmu_write_protect_gfn(struct kvm *kvm,
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struct kvm_memory_slot *slot, gfn_t gfn);
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int kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes);
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#endif /* __KVM_X86_MMU_TDP_MMU_H */
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