| // SPDX-License-Identifier: GPL-2.0 |
| |
| #ifndef __KVM_X86_MMU_TDP_MMU_H |
| #define __KVM_X86_MMU_TDP_MMU_H |
| |
| #include <linux/kvm_host.h> |
| |
| hpa_t kvm_tdp_mmu_get_vcpu_root_hpa(struct kvm_vcpu *vcpu); |
| |
| __must_check static inline bool kvm_tdp_mmu_get_root(struct kvm *kvm, |
| struct kvm_mmu_page *root) |
| { |
| if (root->role.invalid) |
| return false; |
| |
| return refcount_inc_not_zero(&root->tdp_mmu_root_count); |
| } |
| |
| void kvm_tdp_mmu_put_root(struct kvm *kvm, struct kvm_mmu_page *root, |
| bool shared); |
| |
| bool __kvm_tdp_mmu_zap_gfn_range(struct kvm *kvm, int as_id, gfn_t start, |
| gfn_t end, bool can_yield, bool flush, |
| bool shared); |
| static inline bool kvm_tdp_mmu_zap_gfn_range(struct kvm *kvm, int as_id, |
| gfn_t start, gfn_t end, bool flush, |
| bool shared) |
| { |
| return __kvm_tdp_mmu_zap_gfn_range(kvm, as_id, start, end, true, flush, |
| shared); |
| } |
| static inline bool kvm_tdp_mmu_zap_sp(struct kvm *kvm, struct kvm_mmu_page *sp) |
| { |
| gfn_t end = sp->gfn + KVM_PAGES_PER_HPAGE(sp->role.level + 1); |
| |
| /* |
| * Don't allow yielding, as the caller may have a flush pending. Note, |
| * if mmu_lock is held for write, zapping will never yield in this case, |
| * but explicitly disallow it for safety. The TDP MMU does not yield |
| * until it has made forward progress (steps sideways), and when zapping |
| * a single shadow page that it's guaranteed to see (thus the mmu_lock |
| * requirement), its "step sideways" will always step beyond the bounds |
| * of the shadow page's gfn range and stop iterating before yielding. |
| */ |
| lockdep_assert_held_write(&kvm->mmu_lock); |
| return __kvm_tdp_mmu_zap_gfn_range(kvm, kvm_mmu_page_as_id(sp), |
| sp->gfn, end, false, false, false); |
| } |
| |
| void kvm_tdp_mmu_zap_all(struct kvm *kvm); |
| void kvm_tdp_mmu_invalidate_all_roots(struct kvm *kvm); |
| void kvm_tdp_mmu_zap_invalidated_roots(struct kvm *kvm); |
| |
| int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code, |
| int map_writable, int max_level, kvm_pfn_t pfn, |
| bool prefault); |
| |
| bool kvm_tdp_mmu_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range, |
| bool flush); |
| bool kvm_tdp_mmu_age_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range); |
| bool kvm_tdp_mmu_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range); |
| bool kvm_tdp_mmu_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range); |
| |
| bool kvm_tdp_mmu_wrprot_slot(struct kvm *kvm, struct kvm_memory_slot *slot, |
| int min_level); |
| bool kvm_tdp_mmu_clear_dirty_slot(struct kvm *kvm, |
| struct kvm_memory_slot *slot); |
| void kvm_tdp_mmu_clear_dirty_pt_masked(struct kvm *kvm, |
| struct kvm_memory_slot *slot, |
| gfn_t gfn, unsigned long mask, |
| bool wrprot); |
| bool kvm_tdp_mmu_zap_collapsible_sptes(struct kvm *kvm, |
| const struct kvm_memory_slot *slot, |
| bool flush); |
| |
| bool kvm_tdp_mmu_write_protect_gfn(struct kvm *kvm, |
| struct kvm_memory_slot *slot, gfn_t gfn, |
| int min_level); |
| |
| int kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes, |
| int *root_level); |
| |
| #ifdef CONFIG_X86_64 |
| bool kvm_mmu_init_tdp_mmu(struct kvm *kvm); |
| void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm); |
| static inline bool is_tdp_mmu_enabled(struct kvm *kvm) { return kvm->arch.tdp_mmu_enabled; } |
| static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return sp->tdp_mmu_page; } |
| |
| static inline bool is_tdp_mmu(struct kvm_mmu *mmu) |
| { |
| struct kvm_mmu_page *sp; |
| hpa_t hpa = mmu->root_hpa; |
| |
| if (WARN_ON(!VALID_PAGE(hpa))) |
| return false; |
| |
| /* |
| * A NULL shadow page is legal when shadowing a non-paging guest with |
| * PAE paging, as the MMU will be direct with root_hpa pointing at the |
| * pae_root page, not a shadow page. |
| */ |
| sp = to_shadow_page(hpa); |
| return sp && is_tdp_mmu_page(sp) && sp->root_count; |
| } |
| #else |
| static inline bool kvm_mmu_init_tdp_mmu(struct kvm *kvm) { return false; } |
| static inline void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm) {} |
| static inline bool is_tdp_mmu_enabled(struct kvm *kvm) { return false; } |
| static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return false; } |
| static inline bool is_tdp_mmu(struct kvm_mmu *mmu) { return false; } |
| #endif |
| |
| #endif /* __KVM_X86_MMU_TDP_MMU_H */ |