mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-09-03 17:51:23 +00:00
c4d99a833d
In preparation for supporting stage-2 huge mappings for np-guest. Add a nr_pages argument to the __pkvm_host_test_clear_young_guest hypercall. This range supports only two values: 1 or PMD_SIZE / PAGE_SIZE (that is 512 on a 4K-pages system). Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Link: https://lore.kernel.org/r/20250521124834.1070650-7-vdonnefort@google.com Signed-off-by: Marc Zyngier <maz@kernel.org>
77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2020 Google LLC
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* Author: Quentin Perret <qperret@google.com>
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*/
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#ifndef __KVM_NVHE_MEM_PROTECT__
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#define __KVM_NVHE_MEM_PROTECT__
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#include <linux/kvm_host.h>
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#include <asm/kvm_hyp.h>
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#include <asm/kvm_mmu.h>
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#include <asm/kvm_pgtable.h>
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#include <asm/virt.h>
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#include <nvhe/memory.h>
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#include <nvhe/pkvm.h>
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#include <nvhe/spinlock.h>
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struct host_mmu {
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struct kvm_arch arch;
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struct kvm_pgtable pgt;
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struct kvm_pgtable_mm_ops mm_ops;
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hyp_spinlock_t lock;
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};
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extern struct host_mmu host_mmu;
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/* This corresponds to page-table locking order */
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enum pkvm_component_id {
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PKVM_ID_HOST,
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PKVM_ID_HYP,
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PKVM_ID_FFA,
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};
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extern unsigned long hyp_nr_cpus;
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int __pkvm_prot_finalize(void);
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int __pkvm_host_share_hyp(u64 pfn);
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int __pkvm_host_unshare_hyp(u64 pfn);
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int __pkvm_host_donate_hyp(u64 pfn, u64 nr_pages);
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int __pkvm_hyp_donate_host(u64 pfn, u64 nr_pages);
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int __pkvm_host_share_ffa(u64 pfn, u64 nr_pages);
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int __pkvm_host_unshare_ffa(u64 pfn, u64 nr_pages);
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int __pkvm_host_share_guest(u64 pfn, u64 gfn, u64 nr_pages, struct pkvm_hyp_vcpu *vcpu,
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enum kvm_pgtable_prot prot);
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int __pkvm_host_unshare_guest(u64 gfn, u64 nr_pages, struct pkvm_hyp_vm *hyp_vm);
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int __pkvm_host_relax_perms_guest(u64 gfn, struct pkvm_hyp_vcpu *vcpu, enum kvm_pgtable_prot prot);
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int __pkvm_host_wrprotect_guest(u64 gfn, u64 nr_pages, struct pkvm_hyp_vm *hyp_vm);
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int __pkvm_host_test_clear_young_guest(u64 gfn, u64 nr_pages, bool mkold, struct pkvm_hyp_vm *vm);
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int __pkvm_host_mkyoung_guest(u64 gfn, struct pkvm_hyp_vcpu *vcpu);
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bool addr_is_memory(phys_addr_t phys);
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int host_stage2_idmap_locked(phys_addr_t addr, u64 size, enum kvm_pgtable_prot prot);
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int host_stage2_set_owner_locked(phys_addr_t addr, u64 size, u8 owner_id);
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int kvm_host_prepare_stage2(void *pgt_pool_base);
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int kvm_guest_prepare_stage2(struct pkvm_hyp_vm *vm, void *pgd);
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void handle_host_mem_abort(struct kvm_cpu_context *host_ctxt);
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int hyp_pin_shared_mem(void *from, void *to);
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void hyp_unpin_shared_mem(void *from, void *to);
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void reclaim_pgtable_pages(struct pkvm_hyp_vm *vm, struct kvm_hyp_memcache *mc);
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int refill_memcache(struct kvm_hyp_memcache *mc, unsigned long min_pages,
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struct kvm_hyp_memcache *host_mc);
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static __always_inline void __load_host_stage2(void)
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{
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if (static_branch_likely(&kvm_protected_mode_initialized))
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__load_stage2(&host_mmu.arch.mmu, &host_mmu.arch);
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else
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write_sysreg(0, vttbr_el2);
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}
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#ifdef CONFIG_NVHE_EL2_DEBUG
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void pkvm_ownership_selftest(void *base);
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#else
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static inline void pkvm_ownership_selftest(void *base) { }
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#endif
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#endif /* __KVM_NVHE_MEM_PROTECT__ */
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