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/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2020 Google LLC * Author: Quentin Perret <qperret@google.com> */ #ifndef __KVM_NVHE_MEM_PROTECT__ #define __KVM_NVHE_MEM_PROTECT__ #include <linux/kvm_host.h> #include <asm/kvm_hyp.h> #include <asm/kvm_mmu.h> #include <asm/kvm_pgtable.h> #include <asm/virt.h> #include <nvhe/memory.h> #include <nvhe/pkvm.h> #include <nvhe/spinlock.h> struct host_mmu { struct kvm_arch arch; struct kvm_pgtable pgt; struct kvm_pgtable_mm_ops mm_ops; hyp_spinlock_t lock; }; extern struct host_mmu host_mmu; /* This corresponds to page-table locking order */ enum pkvm_component_id { PKVM_ID_HOST, PKVM_ID_HYP, PKVM_ID_FFA, }; extern unsigned long hyp_nr_cpus; int __pkvm_prot_finalize(void); int __pkvm_host_share_hyp(u64 pfn); int __pkvm_host_unshare_hyp(u64 pfn); int __pkvm_host_donate_hyp(u64 pfn, u64 nr_pages); int __pkvm_hyp_donate_host(u64 pfn, u64 nr_pages); int __pkvm_host_share_ffa(u64 pfn, u64 nr_pages); int __pkvm_host_unshare_ffa(u64 pfn, u64 nr_pages); int __pkvm_host_share_guest(u64 pfn, u64 gfn, struct pkvm_hyp_vcpu *vcpu, enum kvm_pgtable_prot prot); int __pkvm_host_unshare_guest(u64 gfn, struct pkvm_hyp_vm *hyp_vm); int __pkvm_host_relax_perms_guest(u64 gfn, struct pkvm_hyp_vcpu *vcpu, enum kvm_pgtable_prot prot); int __pkvm_host_wrprotect_guest(u64 gfn, struct pkvm_hyp_vm *hyp_vm); int __pkvm_host_test_clear_young_guest(u64 gfn, bool mkold, struct pkvm_hyp_vm *vm); int __pkvm_host_mkyoung_guest(u64 gfn, struct pkvm_hyp_vcpu *vcpu); bool addr_is_memory(phys_addr_t phys); int host_stage2_idmap_locked(phys_addr_t addr, u64 size, enum kvm_pgtable_prot prot); int host_stage2_set_owner_locked(phys_addr_t addr, u64 size, u8 owner_id); int kvm_host_prepare_stage2(void *pgt_pool_base); int kvm_guest_prepare_stage2(struct pkvm_hyp_vm *vm, void *pgd); void handle_host_mem_abort(struct kvm_cpu_context *host_ctxt); int hyp_pin_shared_mem(void *from, void *to); void hyp_unpin_shared_mem(void *from, void *to); void reclaim_guest_pages(struct pkvm_hyp_vm *vm, struct kvm_hyp_memcache *mc); int refill_memcache(struct kvm_hyp_memcache *mc, unsigned long min_pages, struct kvm_hyp_memcache *host_mc); static __always_inline void __load_host_stage2(void) { if (static_branch_likely(&kvm_protected_mode_initialized)) __load_stage2(&host_mmu.arch.mmu, &host_mmu.arch); else write_sysreg(0, vttbr_el2); } #endif /* __KVM_NVHE_MEM_PROTECT__ */