arch/arm64/kvm/hyp/include/nvhe/mem_protect.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2020 Google LLC
   4  * Author: Quentin Perret <qperret@google.com>
   5  */
   6
   7 #ifndef __KVM_NVHE_MEM_PROTECT__
   8 #define __KVM_NVHE_MEM_PROTECT__
   9 #include <linux/kvm_host.h>
  10 #include <asm/kvm_hyp.h>
  11 #include <asm/kvm_pgtable.h>
  12 #include <asm/virt.h>
  13 #include <nvhe/spinlock.h>
  14
  15 struct host_kvm {
  16         struct kvm_arch arch;
  17         struct kvm_pgtable pgt;
  18         struct kvm_pgtable_mm_ops mm_ops;
  19         hyp_spinlock_t lock;
  20 };
  21 extern struct host_kvm host_kvm;
  22
  23 int __pkvm_prot_finalize(void);
  24 int __pkvm_mark_hyp(phys_addr_t start, phys_addr_t end);
  25
  26 int kvm_host_prepare_stage2(void *pgt_pool_base);
  27 void handle_host_mem_abort(struct kvm_cpu_context *host_ctxt);
  28
  29 static __always_inline void __load_host_stage2(void)
  30 {
  31         if (static_branch_likely(&kvm_protected_mode_initialized))
  32                 __load_stage2(&host_kvm.arch.mmu, host_kvm.arch.vtcr);
  33         else
  34                 write_sysreg(0, vttbr_el2);
  35 }
  36 #endif /* __KVM_NVHE_MEM_PROTECT__ */