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Diffstat (limited to '')
-rw-r--r-- | arch/x86/kvm/mmu/tdp_mmu.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu/tdp_mmu.h b/arch/x86/kvm/mmu/tdp_mmu.h new file mode 100644 index 000000000..c82a8bb32 --- /dev/null +++ b/arch/x86/kvm/mmu/tdp_mmu.h @@ -0,0 +1,95 @@ +// 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_mmu_page *root) +{ + 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_leafs(struct kvm *kvm, gfn_t start, gfn_t end, bool flush); +bool kvm_tdp_mmu_zap_sp(struct kvm *kvm, struct kvm_mmu_page *sp); +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, struct kvm_page_fault *fault); + +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, + const struct kvm_memory_slot *slot, int min_level); +bool kvm_tdp_mmu_clear_dirty_slot(struct kvm *kvm, + const 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); +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, + int min_level); + +void kvm_tdp_mmu_try_split_huge_pages(struct kvm *kvm, + const struct kvm_memory_slot *slot, + gfn_t start, gfn_t end, + int target_level, bool shared); + +static inline void kvm_tdp_mmu_walk_lockless_begin(void) +{ + rcu_read_lock(); +} + +static inline void kvm_tdp_mmu_walk_lockless_end(void) +{ + rcu_read_unlock(); +} + +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 +void kvm_mmu_init_tdp_mmu(struct kvm *kvm); +void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm); +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 void kvm_mmu_init_tdp_mmu(struct kvm *kvm) {} +static inline void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm) {} +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 */ |