1 | /****************************************************************************** |
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2 | * platform_hypercall.c |
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3 | * |
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4 | * Hardware platform operations. Intended for use by domain-0 kernel. |
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5 | * |
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6 | * Copyright (c) 2002-2006, K Fraser |
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7 | */ |
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8 | |
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9 | #include <xen/config.h> |
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10 | #include <xen/types.h> |
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11 | #include <xen/lib.h> |
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12 | #include <xen/mm.h> |
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13 | #include <xen/sched.h> |
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14 | #include <xen/domain.h> |
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15 | #include <xen/event.h> |
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16 | #include <xen/domain_page.h> |
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17 | #include <xen/trace.h> |
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18 | #include <xen/console.h> |
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19 | #include <xen/iocap.h> |
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20 | #include <xen/guest_access.h> |
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21 | #include <asm/current.h> |
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22 | #include <public/platform.h> |
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23 | #include <asm/mtrr.h> |
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24 | #include "cpu/mtrr/mtrr.h" |
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25 | |
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26 | #ifndef COMPAT |
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27 | typedef long ret_t; |
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28 | DEFINE_SPINLOCK(xenpf_lock); |
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29 | #else |
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30 | extern spinlock_t xenpf_lock; |
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31 | #endif |
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32 | |
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33 | ret_t do_platform_op(XEN_GUEST_HANDLE(xen_platform_op_t) u_xenpf_op) |
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34 | { |
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35 | ret_t ret = 0; |
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36 | struct xen_platform_op curop, *op = &curop; |
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37 | |
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38 | if ( !IS_PRIV(current->domain) ) |
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39 | return -EPERM; |
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40 | |
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41 | if ( copy_from_guest(op, u_xenpf_op, 1) ) |
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42 | return -EFAULT; |
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43 | |
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44 | if ( op->interface_version != XENPF_INTERFACE_VERSION ) |
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45 | return -EACCES; |
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46 | |
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47 | spin_lock(&xenpf_lock); |
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48 | |
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49 | switch ( op->cmd ) |
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50 | { |
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51 | case XENPF_settime: |
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52 | { |
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53 | do_settime(op->u.settime.secs, |
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54 | op->u.settime.nsecs, |
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55 | op->u.settime.system_time); |
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56 | ret = 0; |
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57 | } |
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58 | break; |
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59 | |
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60 | case XENPF_add_memtype: |
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61 | { |
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62 | ret = mtrr_add_page( |
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63 | op->u.add_memtype.mfn, |
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64 | op->u.add_memtype.nr_mfns, |
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65 | op->u.add_memtype.type, |
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66 | 1); |
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67 | if ( ret >= 0 ) |
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68 | { |
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69 | op->u.add_memtype.handle = 0; |
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70 | op->u.add_memtype.reg = ret; |
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71 | ret = copy_to_guest(u_xenpf_op, op, 1) ? -EFAULT : 0; |
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72 | if ( ret != 0 ) |
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73 | mtrr_del_page(ret, 0, 0); |
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74 | } |
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75 | } |
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76 | break; |
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77 | |
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78 | case XENPF_del_memtype: |
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79 | { |
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80 | if (op->u.del_memtype.handle == 0 |
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81 | /* mtrr/main.c otherwise does a lookup */ |
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82 | && (int)op->u.del_memtype.reg >= 0) |
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83 | { |
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84 | ret = mtrr_del_page(op->u.del_memtype.reg, 0, 0); |
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85 | if ( ret > 0 ) |
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86 | ret = 0; |
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87 | } |
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88 | else |
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89 | ret = -EINVAL; |
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90 | } |
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91 | break; |
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92 | |
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93 | case XENPF_read_memtype: |
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94 | { |
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95 | unsigned long mfn; |
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96 | unsigned int nr_mfns; |
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97 | mtrr_type type; |
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98 | |
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99 | ret = -EINVAL; |
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100 | if ( op->u.read_memtype.reg < num_var_ranges ) |
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101 | { |
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102 | mtrr_if->get(op->u.read_memtype.reg, &mfn, &nr_mfns, &type); |
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103 | op->u.read_memtype.mfn = mfn; |
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104 | op->u.read_memtype.nr_mfns = nr_mfns; |
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105 | op->u.read_memtype.type = type; |
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106 | ret = copy_to_guest(u_xenpf_op, op, 1) ? -EFAULT : 0; |
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107 | } |
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108 | } |
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109 | break; |
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110 | |
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111 | case XENPF_microcode_update: |
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112 | { |
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113 | extern int microcode_update(XEN_GUEST_HANDLE(void), unsigned long len); |
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114 | #ifndef COMPAT |
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115 | ret = microcode_update(op->u.microcode.data, |
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116 | op->u.microcode.length); |
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117 | #else |
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118 | XEN_GUEST_HANDLE(void) data; |
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119 | |
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120 | guest_from_compat_handle(data, op->u.microcode.data); |
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121 | ret = microcode_update(data, op->u.microcode.length); |
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122 | #endif |
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123 | } |
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124 | break; |
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125 | |
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126 | case XENPF_platform_quirk: |
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127 | { |
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128 | extern int opt_noirqbalance; |
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129 | int quirk_id = op->u.platform_quirk.quirk_id; |
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130 | switch ( quirk_id ) |
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131 | { |
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132 | case QUIRK_NOIRQBALANCING: |
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133 | printk("Platform quirk -- Disabling IRQ balancing/affinity.\n"); |
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134 | opt_noirqbalance = 1; |
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135 | setup_ioapic_dest(); |
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136 | break; |
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137 | case QUIRK_IOAPIC_BAD_REGSEL: |
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138 | case QUIRK_IOAPIC_GOOD_REGSEL: |
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139 | #ifndef sis_apic_bug |
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140 | sis_apic_bug = (quirk_id == QUIRK_IOAPIC_BAD_REGSEL); |
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141 | dprintk(XENLOG_INFO, "Domain 0 says that IO-APIC REGSEL is %s\n", |
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142 | sis_apic_bug ? "bad" : "good"); |
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143 | #else |
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144 | BUG_ON(sis_apic_bug != (quirk_id == QUIRK_IOAPIC_BAD_REGSEL)); |
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145 | #endif |
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146 | break; |
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147 | default: |
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148 | ret = -EINVAL; |
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149 | break; |
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150 | } |
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151 | } |
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152 | break; |
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153 | |
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154 | default: |
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155 | ret = -ENOSYS; |
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156 | break; |
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157 | } |
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158 | |
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159 | spin_unlock(&xenpf_lock); |
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160 | |
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161 | return ret; |
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162 | } |
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163 | |
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164 | /* |
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165 | * Local variables: |
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166 | * mode: C |
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167 | * c-set-style: "BSD" |
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168 | * c-basic-offset: 4 |
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169 | * tab-width: 4 |
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170 | * indent-tabs-mode: nil |
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171 | * End: |
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172 | */ |
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