tdp_mmu.h

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// 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>
 
#include "spte.h"
 
void kvm_mmu_init_tdp_mmu(struct kvm *kvm);
void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm);
 
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 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
static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return sp->tdp_mmu_page; }
#else
static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return false; }
#endif
 
#endif /* __KVM_X86_MMU_TDP_MMU_H */