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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>
hpa_t kvm_tdp_mmu_get_vcpu_root_hpa(struct kvm_vcpu *vcpu);
void kvm_tdp_mmu_free_root(struct kvm *kvm, struct kvm_mmu_page *root);
bool __kvm_tdp_mmu_zap_gfn_range(struct kvm *kvm, gfn_t start, gfn_t end,
bool can_yield);
static inline bool kvm_tdp_mmu_zap_gfn_range(struct kvm *kvm, gfn_t start,
gfn_t end)
{
return __kvm_tdp_mmu_zap_gfn_range(kvm, start, end, true);
}
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);
/*
* 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, sp->gfn, end, false);
}
void kvm_tdp_mmu_zap_all(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);
int kvm_tdp_mmu_zap_hva_range(struct kvm *kvm, unsigned long start,
unsigned long end);
int kvm_tdp_mmu_age_hva_range(struct kvm *kvm, unsigned long start,
unsigned long end);
int kvm_tdp_mmu_test_age_hva(struct kvm *kvm, unsigned long hva);
int kvm_tdp_mmu_set_spte_hva(struct kvm *kvm, unsigned long address,
pte_t *host_ptep);
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);
void kvm_tdp_mmu_zap_collapsible_sptes(struct kvm *kvm,
struct kvm_memory_slot *slot);
bool kvm_tdp_mmu_write_protect_gfn(struct kvm *kvm,
struct kvm_memory_slot *slot, gfn_t gfn);
int kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes,
int *root_level);
#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_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; }
#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_enabled(struct kvm *kvm) { return false; }
static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return false; }
#endif
static inline bool is_tdp_mmu_root(struct kvm *kvm, hpa_t hpa)
{
struct kvm_mmu_page *sp;
if (!is_tdp_mmu_enabled(kvm))
return false;
if (WARN_ON(!VALID_PAGE(hpa)))
return false;
sp = to_shadow_page(hpa);
if (WARN_ON(!sp))
return false;
return is_tdp_mmu_page(sp) && sp->root_count;
}
#endif /* __KVM_X86_MMU_TDP_MMU_H */
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