arch/arm64/kernel/image-vars.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Linker script variables to be set after section resolution, as
   4  * ld.lld does not like variables assigned before SECTIONS is processed.
   5  */
   6 #ifndef __ARM64_KERNEL_IMAGE_VARS_H
   7 #define __ARM64_KERNEL_IMAGE_VARS_H
   8
   9 #ifndef LINKER_SCRIPT
  10 #error This file should only be included in vmlinux.lds.S
  11 #endif
  12
  13 #ifdef CONFIG_EFI
  14
  15 __efistub_kernel_size           = _edata - _text;
  16 __efistub_primary_entry_offset  = primary_entry - _text;
  17
  18
  19 /*
  20  * The EFI stub has its own symbol namespace prefixed by __efistub_, to
  21  * isolate it from the kernel proper. The following symbols are legally
  22  * accessed by the stub, so provide some aliases to make them accessible.
  23  * Only include data symbols here, or text symbols of functions that are
  24  * guaranteed to be safe when executed at another offset than they were
  25  * linked at. The routines below are all implemented in assembler in a
  26  * position independent manner
  27  */
  28 __efistub_memcmp                = __pi_memcmp;
  29 __efistub_memchr                = __pi_memchr;
  30 __efistub_memcpy                = __pi_memcpy;
  31 __efistub_memmove               = __pi_memmove;
  32 __efistub_memset                = __pi_memset;
  33 __efistub_strlen                = __pi_strlen;
  34 __efistub_strnlen               = __pi_strnlen;
  35 __efistub_strcmp                = __pi_strcmp;
  36 __efistub_strncmp               = __pi_strncmp;
  37 __efistub_strrchr               = __pi_strrchr;
  38 __efistub___clean_dcache_area_poc = __pi___clean_dcache_area_poc;
  39
  40 #ifdef CONFIG_KASAN
  41 __efistub___memcpy              = __pi_memcpy;
  42 __efistub___memmove             = __pi_memmove;
  43 __efistub___memset              = __pi_memset;
  44 #endif
  45
  46 __efistub__text                 = _text;
  47 __efistub__end                  = _end;
  48 __efistub__edata                = _edata;
  49 __efistub_screen_info           = screen_info;
  50 __efistub__ctype                = _ctype;
  51
  52 #endif
  53
  54 #ifdef CONFIG_KVM
  55
  56 /*
  57  * KVM nVHE code has its own symbol namespace prefixed with __kvm_nvhe_, to
  58  * separate it from the kernel proper. The following symbols are legally
  59  * accessed by it, therefore provide aliases to make them linkable.
  60  * Do not include symbols which may not be safely accessed under hypervisor
  61  * memory mappings.
  62  */
  63
  64 #define KVM_NVHE_ALIAS(sym) __kvm_nvhe_##sym = sym;
  65
  66 /* Alternative callbacks for init-time patching of nVHE hyp code. */
  67 KVM_NVHE_ALIAS(arm64_enable_wa2_handling);
  68 KVM_NVHE_ALIAS(kvm_patch_vector_branch);
  69 KVM_NVHE_ALIAS(kvm_update_va_mask);
  70
  71 /* Global kernel state accessed by nVHE hyp code. */
  72 KVM_NVHE_ALIAS(arm64_ssbd_callback_required);
  73 KVM_NVHE_ALIAS(kvm_host_data);
  74 KVM_NVHE_ALIAS(kvm_vgic_global_state);
  75
  76 /* Kernel constant needed to compute idmap addresses. */
  77 KVM_NVHE_ALIAS(kimage_voffset);
  78
  79 /* Kernel symbols used to call panic() from nVHE hyp code (via ERET). */
  80 KVM_NVHE_ALIAS(__hyp_panic_string);
  81 KVM_NVHE_ALIAS(panic);
  82
  83 /* Vectors installed by hyp-init on reset HVC. */
  84 KVM_NVHE_ALIAS(__hyp_stub_vectors);
  85
  86 /* IDMAP TCR_EL1.T0SZ as computed by the EL1 init code */
  87 KVM_NVHE_ALIAS(idmap_t0sz);
  88
  89 /* Kernel symbol used by icache_is_vpipt(). */
  90 KVM_NVHE_ALIAS(__icache_flags);
  91
  92 /* Kernel symbols needed for cpus_have_final/const_caps checks. */
  93 KVM_NVHE_ALIAS(arm64_const_caps_ready);
  94 KVM_NVHE_ALIAS(cpu_hwcap_keys);
  95 KVM_NVHE_ALIAS(cpu_hwcaps);
  96
  97 /* Static keys which are set if a vGIC trap should be handled in hyp. */
  98 KVM_NVHE_ALIAS(vgic_v2_cpuif_trap);
  99 KVM_NVHE_ALIAS(vgic_v3_cpuif_trap);
 100
 101 /* Static key checked in pmr_sync(). */
 102 #ifdef CONFIG_ARM64_PSEUDO_NMI
 103 KVM_NVHE_ALIAS(gic_pmr_sync);
 104 #endif
 105
 106 /* EL2 exception handling */
 107 KVM_NVHE_ALIAS(__start___kvm_ex_table);
 108 KVM_NVHE_ALIAS(__stop___kvm_ex_table);
 109
 110 #endif /* CONFIG_KVM */
 111
 112 #endif /* __ARM64_KERNEL_IMAGE_VARS_H */