1 | /* |
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2 | * This program is free software; you can redistribute it and/or modify |
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3 | * it under the terms of the GNU General Public License as published by |
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4 | * the Free Software Foundation; either version 2 of the License, or |
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5 | * (at your option) any later version. |
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6 | * |
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7 | * This program is distributed in the hope that it will be useful, |
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8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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10 | * GNU General Public License for more details. |
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11 | * |
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12 | * You should have received a copy of the GNU General Public License |
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13 | * along with this program; if not, write to the Free Software |
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14 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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15 | * |
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16 | * Tristan Gingold <tristan.gingold@bull.net> |
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17 | */ |
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18 | #include <linux/types.h> |
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19 | #include <linux/errno.h> |
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20 | #include <linux/kernel.h> |
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21 | #include <linux/gfp.h> |
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22 | #include <linux/module.h> |
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23 | #include <xen/interface/xen.h> |
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24 | #include <xen/interface/platform.h> |
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25 | #include <xen/interface/memory.h> |
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26 | #include <xen/interface/xencomm.h> |
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27 | #include <xen/interface/version.h> |
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28 | #include <xen/interface/sched.h> |
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29 | #include <xen/interface/event_channel.h> |
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30 | #include <xen/interface/physdev.h> |
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31 | #include <xen/interface/grant_table.h> |
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32 | #include <xen/interface/callback.h> |
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33 | #include <xen/interface/acm_ops.h> |
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34 | #include <xen/interface/hvm/params.h> |
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35 | #include <xen/interface/xenoprof.h> |
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36 | #include <xen/interface/vcpu.h> |
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37 | #include <asm/hypercall.h> |
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38 | #include <asm/page.h> |
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39 | #include <asm/uaccess.h> |
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40 | #include <asm/xen/xencomm.h> |
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41 | #include <asm/perfmon.h> |
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42 | |
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43 | /* Xencomm notes: |
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44 | * This file defines hypercalls to be used by xencomm. The hypercalls simply |
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45 | * create inlines descriptors for pointers and then call the raw arch hypercall |
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46 | * xencomm_arch_hypercall_XXX |
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47 | * |
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48 | * If the arch wants to directly use these hypercalls, simply define macros |
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49 | * in asm/hypercall.h, eg: |
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50 | * #define HYPERVISOR_sched_op xencomm_hypercall_sched_op |
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51 | * |
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52 | * The arch may also define HYPERVISOR_xxx as a function and do more operations |
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53 | * before/after doing the hypercall. |
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54 | * |
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55 | * Note: because only inline descriptors are created these functions must only |
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56 | * be called with in kernel memory parameters. |
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57 | */ |
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58 | |
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59 | int |
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60 | xencomm_hypercall_console_io(int cmd, int count, char *str) |
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61 | { |
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62 | return xencomm_arch_hypercall_console_io |
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63 | (cmd, count, xencomm_create_inline(str)); |
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64 | } |
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65 | |
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66 | int |
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67 | xencomm_hypercall_event_channel_op(int cmd, void *op) |
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68 | { |
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69 | return xencomm_arch_hypercall_event_channel_op |
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70 | (cmd, xencomm_create_inline(op)); |
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71 | } |
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72 | |
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73 | int |
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74 | xencomm_hypercall_xen_version(int cmd, void *arg) |
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75 | { |
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76 | switch (cmd) { |
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77 | case XENVER_version: |
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78 | case XENVER_extraversion: |
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79 | case XENVER_compile_info: |
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80 | case XENVER_capabilities: |
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81 | case XENVER_changeset: |
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82 | case XENVER_platform_parameters: |
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83 | case XENVER_pagesize: |
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84 | case XENVER_get_features: |
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85 | break; |
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86 | default: |
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87 | printk("%s: unknown version cmd %d\n", __func__, cmd); |
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88 | return -ENOSYS; |
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89 | } |
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90 | |
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91 | return xencomm_arch_hypercall_xen_version |
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92 | (cmd, xencomm_create_inline(arg)); |
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93 | } |
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94 | |
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95 | int |
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96 | xencomm_hypercall_physdev_op(int cmd, void *op) |
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97 | { |
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98 | return xencomm_arch_hypercall_physdev_op |
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99 | (cmd, xencomm_create_inline(op)); |
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100 | } |
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101 | |
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102 | static void * |
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103 | xencommize_grant_table_op(unsigned int cmd, void *op, unsigned int count) |
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104 | { |
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105 | switch (cmd) { |
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106 | case GNTTABOP_map_grant_ref: |
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107 | case GNTTABOP_unmap_grant_ref: |
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108 | break; |
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109 | case GNTTABOP_setup_table: |
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110 | { |
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111 | struct gnttab_setup_table *setup = op; |
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112 | struct xencomm_handle *frame_list; |
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113 | |
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114 | frame_list = xencomm_create_inline |
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115 | (xen_guest_handle(setup->frame_list)); |
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116 | |
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117 | set_xen_guest_handle(setup->frame_list, (void *)frame_list); |
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118 | break; |
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119 | } |
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120 | case GNTTABOP_dump_table: |
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121 | case GNTTABOP_transfer: |
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122 | case GNTTABOP_copy: |
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123 | break; |
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124 | default: |
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125 | printk("%s: unknown grant table op %d\n", __func__, cmd); |
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126 | BUG(); |
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127 | } |
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128 | |
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129 | return xencomm_create_inline(op); |
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130 | } |
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131 | |
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132 | int |
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133 | xencomm_hypercall_grant_table_op(unsigned int cmd, void *op, unsigned int count) |
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134 | { |
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135 | void *desc = xencommize_grant_table_op (cmd, op, count); |
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136 | |
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137 | return xencomm_arch_hypercall_grant_table_op(cmd, desc, count); |
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138 | } |
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139 | |
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140 | int |
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141 | xencomm_hypercall_sched_op(int cmd, void *arg) |
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142 | { |
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143 | switch (cmd) { |
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144 | case SCHEDOP_yield: |
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145 | case SCHEDOP_block: |
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146 | case SCHEDOP_shutdown: |
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147 | case SCHEDOP_remote_shutdown: |
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148 | break; |
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149 | case SCHEDOP_poll: |
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150 | { |
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151 | sched_poll_t *poll = arg; |
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152 | struct xencomm_handle *ports; |
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153 | |
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154 | ports = xencomm_create_inline(xen_guest_handle(poll->ports)); |
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155 | |
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156 | set_xen_guest_handle(poll->ports, (void *)ports); |
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157 | break; |
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158 | } |
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159 | default: |
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160 | printk("%s: unknown sched op %d\n", __func__, cmd); |
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161 | return -ENOSYS; |
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162 | } |
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163 | |
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164 | return xencomm_arch_hypercall_sched_op(cmd, xencomm_create_inline(arg)); |
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165 | } |
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166 | |
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167 | int |
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168 | xencomm_hypercall_multicall(void *call_list, int nr_calls) |
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169 | { |
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170 | int i; |
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171 | multicall_entry_t *mce; |
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172 | |
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173 | for (i = 0; i < nr_calls; i++) { |
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174 | mce = (multicall_entry_t *)call_list + i; |
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175 | |
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176 | switch (mce->op) { |
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177 | case __HYPERVISOR_update_va_mapping: |
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178 | case __HYPERVISOR_mmu_update: |
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179 | /* No-op on ia64. */ |
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180 | break; |
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181 | case __HYPERVISOR_grant_table_op: |
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182 | mce->args[1] = (unsigned long)xencommize_grant_table_op |
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183 | (mce->args[0], (void *)mce->args[1], |
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184 | mce->args[2]); |
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185 | break; |
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186 | case __HYPERVISOR_memory_op: |
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187 | default: |
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188 | printk("%s: unhandled multicall op entry op %lu\n", |
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189 | __func__, mce->op); |
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190 | return -ENOSYS; |
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191 | } |
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192 | } |
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193 | |
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194 | return xencomm_arch_hypercall_multicall |
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195 | (xencomm_create_inline(call_list), nr_calls); |
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196 | } |
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197 | |
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198 | int |
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199 | xencomm_hypercall_callback_op(int cmd, void *arg) |
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200 | { |
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201 | switch (cmd) |
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202 | { |
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203 | case CALLBACKOP_register: |
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204 | case CALLBACKOP_unregister: |
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205 | break; |
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206 | default: |
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207 | printk("%s: unknown callback op %d\n", __func__, cmd); |
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208 | return -ENOSYS; |
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209 | } |
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210 | |
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211 | return xencomm_arch_hypercall_callback_op |
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212 | (cmd, xencomm_create_inline(arg)); |
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213 | } |
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214 | |
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215 | static void |
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216 | xencommize_memory_reservation (xen_memory_reservation_t *mop) |
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217 | { |
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218 | struct xencomm_handle *desc; |
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219 | |
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220 | desc = xencomm_create_inline(xen_guest_handle(mop->extent_start)); |
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221 | set_xen_guest_handle(mop->extent_start, (void *)desc); |
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222 | } |
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223 | |
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224 | int |
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225 | xencomm_hypercall_memory_op(unsigned int cmd, void *arg) |
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226 | { |
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227 | XEN_GUEST_HANDLE(xen_pfn_t) extent_start_va[2]; |
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228 | xen_memory_reservation_t *xmr = NULL, *xme_in = NULL, *xme_out = NULL; |
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229 | int rc; |
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230 | |
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231 | switch (cmd) { |
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232 | case XENMEM_increase_reservation: |
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233 | case XENMEM_decrease_reservation: |
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234 | case XENMEM_populate_physmap: |
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235 | xmr = (xen_memory_reservation_t *)arg; |
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236 | xen_guest_handle(extent_start_va[0]) = |
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237 | xen_guest_handle(xmr->extent_start); |
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238 | xencommize_memory_reservation((xen_memory_reservation_t *)arg); |
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239 | break; |
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240 | |
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241 | case XENMEM_maximum_ram_page: |
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242 | break; |
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243 | |
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244 | case XENMEM_exchange: |
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245 | xme_in = &((xen_memory_exchange_t *)arg)->in; |
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246 | xme_out = &((xen_memory_exchange_t *)arg)->out; |
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247 | xen_guest_handle(extent_start_va[0]) = |
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248 | xen_guest_handle(xme_in->extent_start); |
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249 | xen_guest_handle(extent_start_va[1]) = |
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250 | xen_guest_handle(xme_out->extent_start); |
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251 | xencommize_memory_reservation |
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252 | (&((xen_memory_exchange_t *)arg)->in); |
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253 | xencommize_memory_reservation |
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254 | (&((xen_memory_exchange_t *)arg)->out); |
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255 | break; |
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256 | |
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257 | default: |
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258 | printk("%s: unknown memory op %d\n", __func__, cmd); |
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259 | return -ENOSYS; |
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260 | } |
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261 | |
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262 | rc = xencomm_arch_hypercall_memory_op(cmd, xencomm_create_inline(arg)); |
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263 | |
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264 | switch (cmd) { |
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265 | case XENMEM_increase_reservation: |
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266 | case XENMEM_decrease_reservation: |
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267 | case XENMEM_populate_physmap: |
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268 | xen_guest_handle(xmr->extent_start) = |
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269 | xen_guest_handle(extent_start_va[0]); |
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270 | break; |
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271 | |
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272 | case XENMEM_exchange: |
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273 | xen_guest_handle(xme_in->extent_start) = |
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274 | xen_guest_handle(extent_start_va[0]); |
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275 | xen_guest_handle(xme_out->extent_start) = |
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276 | xen_guest_handle(extent_start_va[1]); |
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277 | break; |
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278 | } |
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279 | |
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280 | return rc; |
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281 | } |
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282 | |
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283 | unsigned long |
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284 | xencomm_hypercall_hvm_op(int cmd, void *arg) |
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285 | { |
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286 | switch (cmd) { |
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287 | case HVMOP_set_param: |
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288 | case HVMOP_get_param: |
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289 | break; |
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290 | default: |
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291 | printk("%s: unknown hvm op %d\n", __func__, cmd); |
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292 | return -ENOSYS; |
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293 | } |
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294 | |
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295 | return xencomm_arch_hypercall_hvm_op(cmd, xencomm_create_inline(arg)); |
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296 | } |
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297 | |
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298 | int |
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299 | xencomm_hypercall_suspend(unsigned long srec) |
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300 | { |
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301 | struct sched_shutdown arg; |
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302 | |
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303 | arg.reason = SHUTDOWN_suspend; |
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304 | |
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305 | return xencomm_arch_hypercall_suspend(xencomm_create_inline(&arg)); |
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306 | } |
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307 | |
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308 | int |
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309 | xencomm_hypercall_xenoprof_op(int op, void *arg) |
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310 | { |
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311 | switch (op) { |
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312 | case XENOPROF_init: |
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313 | case XENOPROF_set_active: |
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314 | case XENOPROF_set_passive: |
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315 | case XENOPROF_counter: |
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316 | case XENOPROF_get_buffer: |
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317 | break; |
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318 | |
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319 | case XENOPROF_reset_active_list: |
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320 | case XENOPROF_reset_passive_list: |
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321 | case XENOPROF_reserve_counters: |
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322 | case XENOPROF_setup_events: |
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323 | case XENOPROF_enable_virq: |
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324 | case XENOPROF_start: |
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325 | case XENOPROF_stop: |
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326 | case XENOPROF_disable_virq: |
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327 | case XENOPROF_release_counters: |
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328 | case XENOPROF_shutdown: |
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329 | return xencomm_arch_hypercall_xenoprof_op(op, arg); |
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330 | break; |
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331 | |
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332 | default: |
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333 | printk("%s: op %d isn't supported\n", __func__, op); |
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334 | return -ENOSYS; |
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335 | } |
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336 | return xencomm_arch_hypercall_xenoprof_op(op, |
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337 | xencomm_create_inline(arg)); |
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338 | } |
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339 | |
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340 | int |
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341 | xencomm_hypercall_perfmon_op(unsigned long cmd, void* arg, unsigned long count) |
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342 | { |
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343 | switch (cmd) { |
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344 | case PFM_GET_FEATURES: |
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345 | case PFM_CREATE_CONTEXT: |
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346 | case PFM_WRITE_PMCS: |
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347 | case PFM_WRITE_PMDS: |
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348 | case PFM_LOAD_CONTEXT: |
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349 | break; |
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350 | |
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351 | case PFM_DESTROY_CONTEXT: |
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352 | case PFM_UNLOAD_CONTEXT: |
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353 | case PFM_START: |
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354 | case PFM_STOP: |
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355 | return xencomm_arch_hypercall_perfmon_op(cmd, arg, count); |
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356 | |
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357 | default: |
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358 | printk("%s:%d cmd %ld isn't supported\n", |
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359 | __func__,__LINE__, cmd); |
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360 | BUG(); |
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361 | } |
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362 | |
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363 | return xencomm_arch_hypercall_perfmon_op(cmd, |
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364 | xencomm_create_inline(arg), |
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365 | count); |
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366 | } |
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367 | |
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368 | long |
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369 | xencomm_hypercall_vcpu_op(int cmd, int cpu, void *arg) |
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370 | { |
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371 | switch (cmd) { |
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372 | case VCPUOP_register_runstate_memory_area: |
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373 | xencommize_memory_reservation((xen_memory_reservation_t *)arg); |
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374 | break; |
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375 | |
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376 | default: |
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377 | printk("%s: unknown vcpu op %d\n", __func__, cmd); |
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378 | return -ENOSYS; |
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379 | } |
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380 | |
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381 | return xencomm_arch_hypercall_vcpu_op(cmd, cpu, |
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382 | xencomm_create_inline(arg)); |
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383 | } |
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