xref: /kernel/linux/linux-5.10/arch/x86/kvm/mmu/tdp_mmu.h

// 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>

void kvm_mmu_init_tdp_mmu(struct kvm *kvm);
void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm);

bool is_tdp_mmu_root(struct kvm *kvm, hpa_t root);
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 pending pages to zap
	 * on the shadow MMU.
	 */
	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);
bool kvm_tdp_mmu_slot_set_dirty(struct kvm *kvm, struct kvm_memory_slot *slot);
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 kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes,
			 int *root_level);

#endif /* __KVM_X86_MMU_TDP_MMU_H */