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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);
void kvm_tdp_mmu_alloc_root(struct kvm_vcpu *vcpu, bool private);
__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);
enum kvm_tdp_mmu_root_types {
KVM_INVALID_ROOTS = BIT(0),
KVM_DIRECT_ROOTS = BIT(1),
KVM_MIRROR_ROOTS = BIT(2),
KVM_VALID_ROOTS = KVM_DIRECT_ROOTS | KVM_MIRROR_ROOTS,
KVM_ALL_ROOTS = KVM_VALID_ROOTS | KVM_INVALID_ROOTS,
};
static inline enum kvm_tdp_mmu_root_types kvm_gfn_range_filter_to_root_types(struct kvm *kvm,
enum kvm_gfn_range_filter process)
{
enum kvm_tdp_mmu_root_types ret = 0;
if (!kvm_has_mirrored_tdp(kvm))
return KVM_DIRECT_ROOTS;
if (process & KVM_FILTER_PRIVATE)
ret |= KVM_MIRROR_ROOTS;
if (process & KVM_FILTER_SHARED)
ret |= KVM_DIRECT_ROOTS;
WARN_ON_ONCE(!ret);
return ret;
}
static inline struct kvm_mmu_page *tdp_mmu_get_root_for_fault(struct kvm_vcpu *vcpu,
struct kvm_page_fault *fault)
{
if (unlikely(!kvm_is_addr_direct(vcpu->kvm, fault->addr)))
return root_to_sp(vcpu->arch.mmu->mirror_root_hpa);
return root_to_sp(vcpu->arch.mmu->root.hpa);
}
static inline struct kvm_mmu_page *tdp_mmu_get_root(struct kvm_vcpu *vcpu,
enum kvm_tdp_mmu_root_types type)
{
if (unlikely(type == KVM_MIRROR_ROOTS))
return root_to_sp(vcpu->arch.mmu->mirror_root_hpa);
return root_to_sp(vcpu->arch.mmu->root.hpa);
}
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_roots(struct kvm *kvm,
enum kvm_tdp_mmu_root_types root_types);
void kvm_tdp_mmu_zap_invalidated_roots(struct kvm *kvm, bool shared);
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_wrprot_slot(struct kvm *kvm,
const struct kvm_memory_slot *slot, int min_level);
void 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_recover_huge_pages(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, gfn_t gfn,
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 */
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