1 | |
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2 | #ifndef XC_PRIVATE_H |
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3 | #define XC_PRIVATE_H |
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4 | |
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5 | #include <unistd.h> |
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6 | #include <stdio.h> |
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7 | #include <errno.h> |
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8 | #include <fcntl.h> |
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9 | #include <string.h> |
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10 | #include <sys/mman.h> |
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11 | #include <sys/types.h> |
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12 | #include <sys/stat.h> |
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13 | #include <stdlib.h> |
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14 | #include <sys/ioctl.h> |
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15 | |
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16 | #include "xenctrl.h" |
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17 | |
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18 | #include <xen/sys/privcmd.h> |
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19 | |
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20 | /* valgrind cannot see when a hypercall has filled in some values. For this |
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21 | reason, we must zero the privcmd_hypercall_t or domctl/sysctl instance |
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22 | before a call, if using valgrind. */ |
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23 | #ifdef VALGRIND |
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24 | #define DECLARE_HYPERCALL privcmd_hypercall_t hypercall = { 0 } |
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25 | #define DECLARE_DOMCTL struct xen_domctl domctl = { 0 } |
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26 | #define DECLARE_SYSCTL struct xen_sysctl sysctl = { 0 } |
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27 | #else |
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28 | #define DECLARE_HYPERCALL privcmd_hypercall_t hypercall |
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29 | #define DECLARE_DOMCTL struct xen_domctl domctl |
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30 | #define DECLARE_SYSCTL struct xen_sysctl sysctl |
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31 | #endif |
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32 | |
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33 | #undef PAGE_SHIFT |
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34 | #undef PAGE_SIZE |
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35 | #undef PAGE_MASK |
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36 | #define PAGE_SHIFT XC_PAGE_SHIFT |
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37 | #define PAGE_SIZE (1UL << PAGE_SHIFT) |
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38 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
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39 | |
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40 | #define DEBUG 1 |
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41 | #define INFO 1 |
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42 | #define PROGRESS 0 |
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43 | |
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44 | /* |
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45 | ** Define max dirty page cache to permit during save/restore -- need to balance |
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46 | ** keeping cache usage down with CPU impact of invalidating too often. |
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47 | ** (Currently 16MB) |
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48 | */ |
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49 | #define MAX_PAGECACHE_USAGE (4*1024) |
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50 | |
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51 | #if INFO |
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52 | #define IPRINTF(_f, _a...) printf(_f , ## _a) |
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53 | #else |
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54 | #define IPRINTF(_f, _a...) ((void)0) |
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55 | #endif |
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56 | |
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57 | #if DEBUG |
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58 | #define DPRINTF(_f, _a...) fprintf(stderr, _f , ## _a) |
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59 | #else |
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60 | #define DPRINTF(_f, _a...) ((void)0) |
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61 | #endif |
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62 | |
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63 | #if PROGRESS |
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64 | #define PPRINTF(_f, _a...) fprintf(stderr, _f , ## _a) |
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65 | #else |
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66 | #define PPRINTF(_f, _a...) |
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67 | #endif |
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68 | |
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69 | char *safe_strerror(int errcode); |
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70 | void xc_set_error(int code, const char *fmt, ...); |
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71 | |
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72 | #define ERROR(_m, _a...) xc_set_error(XC_INTERNAL_ERROR, _m , ## _a ) |
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73 | #define PERROR(_m, _a...) xc_set_error(XC_INTERNAL_ERROR, _m " (%d = %s)", \ |
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74 | ## _a , errno, safe_strerror(errno)) |
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75 | |
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76 | int lock_pages(void *addr, size_t len); |
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77 | void unlock_pages(void *addr, size_t len); |
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78 | |
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79 | static inline void safe_munlock(const void *addr, size_t len) |
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80 | { |
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81 | int saved_errno = errno; |
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82 | (void)munlock(addr, len); |
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83 | errno = saved_errno; |
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84 | } |
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85 | |
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86 | int do_xen_hypercall(int xc_handle, privcmd_hypercall_t *hypercall); |
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87 | |
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88 | static inline int do_xen_version(int xc_handle, int cmd, void *dest) |
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89 | { |
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90 | DECLARE_HYPERCALL; |
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91 | |
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92 | hypercall.op = __HYPERVISOR_xen_version; |
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93 | hypercall.arg[0] = (unsigned long) cmd; |
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94 | hypercall.arg[1] = (unsigned long) dest; |
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95 | |
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96 | return do_xen_hypercall(xc_handle, &hypercall); |
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97 | } |
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98 | |
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99 | static inline int do_domctl(int xc_handle, struct xen_domctl *domctl) |
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100 | { |
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101 | int ret = -1; |
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102 | DECLARE_HYPERCALL; |
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103 | |
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104 | domctl->interface_version = XEN_DOMCTL_INTERFACE_VERSION; |
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105 | |
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106 | hypercall.op = __HYPERVISOR_domctl; |
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107 | hypercall.arg[0] = (unsigned long)domctl; |
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108 | |
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109 | if ( lock_pages(domctl, sizeof(*domctl)) != 0 ) |
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110 | { |
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111 | PERROR("Could not lock memory for Xen hypercall"); |
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112 | goto out1; |
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113 | } |
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114 | |
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115 | if ( (ret = do_xen_hypercall(xc_handle, &hypercall)) < 0 ) |
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116 | { |
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117 | if ( errno == EACCES ) |
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118 | DPRINTF("domctl operation failed -- need to" |
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119 | " rebuild the user-space tool set?\n"); |
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120 | } |
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121 | |
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122 | unlock_pages(domctl, sizeof(*domctl)); |
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123 | |
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124 | out1: |
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125 | return ret; |
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126 | } |
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127 | |
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128 | static inline int do_sysctl(int xc_handle, struct xen_sysctl *sysctl) |
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129 | { |
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130 | int ret = -1; |
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131 | DECLARE_HYPERCALL; |
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132 | |
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133 | sysctl->interface_version = XEN_SYSCTL_INTERFACE_VERSION; |
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134 | |
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135 | hypercall.op = __HYPERVISOR_sysctl; |
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136 | hypercall.arg[0] = (unsigned long)sysctl; |
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137 | |
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138 | if ( lock_pages(sysctl, sizeof(*sysctl)) != 0 ) |
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139 | { |
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140 | PERROR("Could not lock memory for Xen hypercall"); |
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141 | goto out1; |
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142 | } |
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143 | |
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144 | if ( (ret = do_xen_hypercall(xc_handle, &hypercall)) < 0 ) |
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145 | { |
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146 | if ( errno == EACCES ) |
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147 | DPRINTF("sysctl operation failed -- need to" |
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148 | " rebuild the user-space tool set?\n"); |
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149 | } |
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150 | |
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151 | unlock_pages(sysctl, sizeof(*sysctl)); |
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152 | |
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153 | out1: |
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154 | return ret; |
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155 | } |
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156 | |
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157 | int xc_map_foreign_ranges(int xc_handle, uint32_t dom, |
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158 | privcmd_mmap_entry_t *entries, int nr); |
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159 | |
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160 | void *map_domain_va_core(unsigned long domfd, int cpu, void *guest_va, |
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161 | vcpu_guest_context_t *ctxt); |
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162 | int xc_waitdomain_core(int xc_handle, int domain, int *status, |
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163 | int options, vcpu_guest_context_t *ctxt); |
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164 | |
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165 | void bitmap_64_to_byte(uint8_t *bp, const uint64_t *lp, int nbits); |
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166 | void bitmap_byte_to_64(uint64_t *lp, const uint8_t *bp, int nbits); |
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167 | |
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168 | /* Optionally flush file to disk and discard page cache */ |
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169 | void discard_file_cache(int fd, int flush); |
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170 | |
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171 | #define MAX_MMU_UPDATES 1024 |
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172 | struct xc_mmu { |
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173 | mmu_update_t updates[MAX_MMU_UPDATES]; |
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174 | int idx; |
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175 | domid_t subject; |
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176 | }; |
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177 | /* Structure returned by xc_alloc_mmu_updates must be free()'ed by caller. */ |
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178 | struct xc_mmu *xc_alloc_mmu_updates(int xc_handle, domid_t dom); |
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179 | int xc_add_mmu_update(int xc_handle, struct xc_mmu *mmu, |
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180 | unsigned long long ptr, unsigned long long val); |
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181 | int xc_flush_mmu_updates(int xc_handle, struct xc_mmu *mmu); |
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182 | |
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183 | #endif /* __XC_PRIVATE_H__ */ |
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