1 | /****************************************************************************** |
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2 | * include/asm-x86/hap.h |
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3 | * |
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4 | * hardware-assisted paging |
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5 | * Copyright (c) 2007 Advanced Micro Devices (Wei Huang) |
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6 | * |
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7 | * Parts of this code are Copyright (c) 2006 by XenSource Inc. |
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8 | * Parts of this code are Copyright (c) 2006 by Michael A Fetterman |
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9 | * Parts based on earlier work by Michael A Fetterman, Ian Pratt et al. |
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10 | * |
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11 | * This program is free software; you can redistribute it and/or modify |
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12 | * it under the terms of the GNU General Public License as published by |
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13 | * the Free Software Foundation; either version 2 of the License, or |
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14 | * (at your option) any later version. |
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15 | * |
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16 | * This program is distributed in the hope that it will be useful, |
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17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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19 | * GNU General Public License for more details. |
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20 | * |
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21 | * You should have received a copy of the GNU General Public License |
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22 | * along with this program; if not, write to the Free Software |
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23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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24 | */ |
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25 | |
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26 | #ifndef _XEN_HAP_H |
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27 | #define _XEN_HAP_H |
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28 | |
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29 | #define HERE_I_AM \ |
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30 | debugtrace_printk("HERE I AM: %s %s %d\n", __func__, __FILE__, __LINE__) |
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31 | #define HAP_PRINTK(_f, _a...) \ |
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32 | debugtrace_printk("hap: %s(): " _f, __func__, ##_a) |
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33 | #define HAP_ERROR(_f, _a...) \ |
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34 | printk("hap error: %s(): " _f, __func__, ##_a) |
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35 | |
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36 | /************************************************/ |
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37 | /* hap domain page mapping */ |
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38 | /************************************************/ |
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39 | static inline void * |
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40 | hap_map_domain_page(mfn_t mfn) |
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41 | { |
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42 | return map_domain_page(mfn_x(mfn)); |
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43 | } |
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44 | |
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45 | static inline void |
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46 | hap_unmap_domain_page(void *p) |
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47 | { |
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48 | unmap_domain_page(p); |
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49 | } |
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50 | |
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51 | static inline void * |
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52 | hap_map_domain_page_global(mfn_t mfn) |
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53 | { |
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54 | return map_domain_page_global(mfn_x(mfn)); |
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55 | } |
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56 | |
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57 | static inline void |
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58 | hap_unmap_domain_page_global(void *p) |
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59 | { |
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60 | unmap_domain_page_global(p); |
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61 | } |
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62 | |
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63 | /************************************************/ |
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64 | /* locking for hap code */ |
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65 | /************************************************/ |
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66 | #define hap_lock_init(_d) \ |
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67 | do { \ |
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68 | spin_lock_init(&(_d)->arch.paging.hap.lock); \ |
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69 | (_d)->arch.paging.hap.locker = -1; \ |
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70 | (_d)->arch.paging.hap.locker_function = "nobody"; \ |
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71 | } while (0) |
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72 | |
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73 | #define hap_locked_by_me(_d) \ |
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74 | (current->processor == (_d)->arch.paging.hap.locker) |
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75 | |
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76 | #define hap_lock(_d) \ |
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77 | do { \ |
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78 | if ( unlikely((_d)->arch.paging.hap.locker == current->processor) )\ |
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79 | { \ |
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80 | printk("Error: hap lock held by %s\n", \ |
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81 | (_d)->arch.paging.hap.locker_function); \ |
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82 | BUG(); \ |
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83 | } \ |
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84 | spin_lock(&(_d)->arch.paging.hap.lock); \ |
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85 | ASSERT((_d)->arch.paging.hap.locker == -1); \ |
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86 | (_d)->arch.paging.hap.locker = current->processor; \ |
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87 | (_d)->arch.paging.hap.locker_function = __func__; \ |
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88 | } while (0) |
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89 | |
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90 | #define hap_unlock(_d) \ |
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91 | do { \ |
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92 | ASSERT((_d)->arch.paging.hap.locker == current->processor); \ |
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93 | (_d)->arch.paging.hap.locker = -1; \ |
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94 | (_d)->arch.paging.hap.locker_function = "nobody"; \ |
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95 | spin_unlock(&(_d)->arch.paging.hap.lock); \ |
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96 | } while (0) |
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97 | |
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98 | /************************************************/ |
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99 | /* hap domain level functions */ |
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100 | /************************************************/ |
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101 | void hap_domain_init(struct domain *d); |
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102 | int hap_domctl(struct domain *d, xen_domctl_shadow_op_t *sc, |
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103 | XEN_GUEST_HANDLE(void) u_domctl); |
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104 | int hap_enable(struct domain *d, u32 mode); |
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105 | void hap_final_teardown(struct domain *d); |
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106 | void hap_teardown(struct domain *d); |
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107 | void hap_vcpu_init(struct vcpu *v); |
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108 | |
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109 | extern struct paging_mode hap_paging_real_mode; |
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110 | extern struct paging_mode hap_paging_protected_mode; |
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111 | extern struct paging_mode hap_paging_pae_mode; |
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112 | extern struct paging_mode hap_paging_long_mode; |
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113 | #endif /* XEN_HAP_H */ |
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114 | |
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115 | /* |
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116 | * Local variables: |
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117 | * mode: C |
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118 | * c-set-style: "BSD" |
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119 | * c-basic-offset: 4 |
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120 | * indent-tabs-mode: nil |
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121 | * End: |
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122 | */ |
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