[1] | 1 | /* |
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| 2 | * vmm.c - virtual memory manager related operations interface. |
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| 3 | * |
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| 4 | * Authors Ghassan Almaless (2008,2009,2010,2011, 2012) |
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| 5 | * Mohamed Lamine Karaoui (2015) |
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| 6 | * Alain Greiner (2016) |
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[21] | 7 | * |
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[1] | 8 | * Copyright (c) UPMC Sorbonne Universites |
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| 9 | * |
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| 10 | * This file is part of ALMOS-MKH. |
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| 11 | * |
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| 12 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| 13 | * under the terms of the GNU General Public License as published by |
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| 14 | * the Free Software Foundation; version 2.0 of the License. |
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| 15 | * |
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| 16 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| 17 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 19 | * 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 ALMOS-MKH; if not, write to the Free Software Foundation, |
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| 23 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 24 | */ |
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| 25 | |
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[14] | 26 | #include <kernel_config.h> |
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[1] | 27 | #include <hal_types.h> |
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| 28 | #include <hal_special.h> |
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| 29 | #include <hal_gpt.h> |
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| 30 | #include <printk.h> |
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[23] | 31 | #include <memcpy.h> |
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[1] | 32 | #include <rwlock.h> |
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| 33 | #include <list.h> |
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[408] | 34 | #include <xlist.h> |
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[1] | 35 | #include <bits.h> |
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| 36 | #include <process.h> |
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| 37 | #include <thread.h> |
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| 38 | #include <vseg.h> |
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| 39 | #include <cluster.h> |
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| 40 | #include <scheduler.h> |
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| 41 | #include <vfs.h> |
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| 42 | #include <mapper.h> |
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| 43 | #include <page.h> |
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| 44 | #include <kmem.h> |
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| 45 | #include <vmm.h> |
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| 46 | |
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| 47 | ////////////////////////////////////////////////////////////////////////////////// |
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| 48 | // Extern global variables |
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| 49 | ////////////////////////////////////////////////////////////////////////////////// |
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| 50 | |
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| 51 | extern process_t process_zero; // defined in cluster.c file |
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| 52 | |
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| 53 | |
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| 54 | //////////////////////////////////// |
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| 55 | void vmm_init( process_t * process ) |
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[21] | 56 | { |
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[1] | 57 | error_t error; |
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| 58 | vseg_t * vseg_kentry; |
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| 59 | vseg_t * vseg_args; |
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| 60 | vseg_t * vseg_envs; |
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| 61 | intptr_t base; |
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| 62 | intptr_t size; |
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| 63 | |
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[407] | 64 | vmm_dmsg("\n[DBG] %s : core[%x,%d] enters for process %x\n", |
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| 65 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , process->pid ); |
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[204] | 66 | |
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[1] | 67 | // get pointer on VMM |
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| 68 | vmm_t * vmm = &process->vmm; |
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| 69 | |
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[407] | 70 | // initialize local list of vsegs |
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| 71 | vmm->vsegs_nr = 0; |
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[408] | 72 | xlist_root_init( XPTR( local_cxy , &vmm->vsegs_root ) ); |
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| 73 | remote_rwlock_init( XPTR( local_cxy , &vmm->vsegs_lock ) ); |
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[407] | 74 | |
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[204] | 75 | assert( ((CONFIG_VMM_KENTRY_SIZE + CONFIG_VMM_ARGS_SIZE + CONFIG_VMM_ENVS_SIZE) |
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| 76 | <= CONFIG_VMM_ELF_BASE) , __FUNCTION__ , "UTILS zone too small\n" ); |
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[21] | 77 | |
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[204] | 78 | assert( (CONFIG_THREAD_MAX_PER_CLUSTER <= 32) , __FUNCTION__ , |
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| 79 | "no more than 32 threads per cluster for a single process\n"); |
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[1] | 80 | |
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[204] | 81 | assert( ((CONFIG_VMM_STACK_SIZE * CONFIG_THREAD_MAX_PER_CLUSTER) <= |
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| 82 | (CONFIG_VMM_VSPACE_SIZE - CONFIG_VMM_STACK_BASE)) , __FUNCTION__ , |
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| 83 | "STACK zone too small\n"); |
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[1] | 84 | |
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| 85 | // register kentry vseg in VMM |
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[406] | 86 | base = CONFIG_VMM_KENTRY_BASE << CONFIG_PPM_PAGE_SHIFT; |
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[1] | 87 | size = CONFIG_VMM_KENTRY_SIZE << CONFIG_PPM_PAGE_SHIFT; |
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[406] | 88 | |
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[407] | 89 | vseg_kentry = vmm_create_vseg( process, |
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| 90 | VSEG_TYPE_CODE, |
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| 91 | base, |
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| 92 | size, |
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| 93 | 0, // file_offset unused |
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| 94 | 0, // file_size unused |
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| 95 | XPTR_NULL, // mapper_xp unused |
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| 96 | local_cxy ); |
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[204] | 97 | |
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| 98 | assert( (vseg_kentry != NULL) , __FUNCTION__ , "cannot register kentry vseg\n" ); |
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| 99 | |
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[406] | 100 | vmm->kent_vpn_base = base; |
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[1] | 101 | |
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[406] | 102 | // register args vseg in VMM |
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| 103 | base = (CONFIG_VMM_KENTRY_BASE + |
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| 104 | CONFIG_VMM_KENTRY_SIZE ) << CONFIG_PPM_PAGE_SHIFT; |
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[1] | 105 | size = CONFIG_VMM_ARGS_SIZE << CONFIG_PPM_PAGE_SHIFT; |
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[406] | 106 | |
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[407] | 107 | vseg_args = vmm_create_vseg( process, |
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| 108 | VSEG_TYPE_DATA, |
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| 109 | base, |
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| 110 | size, |
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| 111 | 0, // file_offset unused |
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| 112 | 0, // file_size unused |
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| 113 | XPTR_NULL, // mapper_xp unused |
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| 114 | local_cxy ); |
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[204] | 115 | |
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[407] | 116 | assert( (vseg_args != NULL) , __FUNCTION__ , "cannot create args vseg\n" ); |
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[204] | 117 | |
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[406] | 118 | vmm->args_vpn_base = base; |
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[1] | 119 | |
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| 120 | // register the envs vseg in VMM |
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[406] | 121 | base = (CONFIG_VMM_KENTRY_BASE + |
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| 122 | CONFIG_VMM_KENTRY_SIZE + |
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| 123 | CONFIG_VMM_ARGS_SIZE ) << CONFIG_PPM_PAGE_SHIFT; |
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[1] | 124 | size = CONFIG_VMM_ENVS_SIZE << CONFIG_PPM_PAGE_SHIFT; |
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[406] | 125 | |
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[407] | 126 | vseg_envs = vmm_create_vseg( process, |
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| 127 | VSEG_TYPE_DATA, |
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| 128 | base, |
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| 129 | size, |
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| 130 | 0, // file_offset unused |
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| 131 | 0, // file_size unused |
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| 132 | XPTR_NULL, // mapper_xp unused |
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| 133 | local_cxy ); |
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[204] | 134 | |
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[407] | 135 | assert( (vseg_envs != NULL) , __FUNCTION__ , "cannot create envs vseg\n" ); |
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[204] | 136 | |
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[406] | 137 | vmm->envs_vpn_base = base; |
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[1] | 138 | |
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| 139 | // initialize generic page table |
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| 140 | error = hal_gpt_create( &vmm->gpt ); |
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| 141 | |
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[204] | 142 | assert( (error == 0) , __FUNCTION__ , "cannot initialize page table\n"); |
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| 143 | |
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[1] | 144 | // initialize STACK allocator |
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| 145 | vmm->stack_mgr.bitmap = 0; |
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| 146 | vmm->stack_mgr.vpn_base = CONFIG_VMM_STACK_BASE; |
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| 147 | |
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| 148 | // initialize MMAP allocator |
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[407] | 149 | vmm->mmap_mgr.vpn_base = CONFIG_VMM_HEAP_BASE; |
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| 150 | vmm->mmap_mgr.vpn_size = CONFIG_VMM_STACK_BASE - CONFIG_VMM_HEAP_BASE; |
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| 151 | vmm->mmap_mgr.first_free_vpn = CONFIG_VMM_HEAP_BASE; |
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[1] | 152 | uint32_t i; |
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| 153 | for( i = 0 ; i < 32 ; i++ ) list_root_init( &vmm->mmap_mgr.zombi_list[i] ); |
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| 154 | |
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[21] | 155 | // initialize instrumentation counters |
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[1] | 156 | vmm->pgfault_nr = 0; |
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| 157 | |
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[124] | 158 | hal_fence(); |
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[1] | 159 | |
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[407] | 160 | vmm_dmsg("\n[DBG] %s : core[%x,%d] exit for process %x / entry_point = %x\n", |
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| 161 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , |
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| 162 | process->pid , process->vmm.entry_point ); |
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[204] | 163 | |
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| 164 | } // end vmm_init() |
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| 165 | |
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[407] | 166 | ////////////////////////////////////// |
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| 167 | void vmm_display( process_t * process, |
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| 168 | bool_t mapping ) |
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| 169 | { |
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| 170 | vmm_t * vmm = &process->vmm; |
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| 171 | gpt_t * gpt = &vmm->gpt; |
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| 172 | |
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| 173 | printk("\n***** VSL and GPT for process %x\n\n", |
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| 174 | process->pid ); |
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| 175 | |
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| 176 | // get lock protecting the vseg list |
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[408] | 177 | remote_rwlock_rd_lock( XPTR( local_cxy , &vmm->vsegs_lock ) ); |
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[407] | 178 | |
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| 179 | // scan the list of vsegs |
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[408] | 180 | xptr_t root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
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| 181 | xptr_t iter_xp; |
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| 182 | xptr_t vseg_xp; |
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[407] | 183 | vseg_t * vseg; |
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[408] | 184 | XLIST_FOREACH( root_xp , iter_xp ) |
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[407] | 185 | { |
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[408] | 186 | vseg_xp = XLIST_ELEMENT( iter_xp , vseg_t , xlist ); |
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| 187 | vseg = (vseg_t *)GET_PTR( vseg_xp ); |
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| 188 | |
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[407] | 189 | printk(" - %s : base = %X / size = %X / npages = %d\n", |
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| 190 | vseg_type_str( vseg->type ) , vseg->min , vseg->max - vseg->min , vseg->vpn_size ); |
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| 191 | |
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| 192 | if( mapping ) |
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| 193 | { |
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| 194 | vpn_t vpn; |
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| 195 | ppn_t ppn; |
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| 196 | uint32_t attr; |
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| 197 | vpn_t base = vseg->vpn_base; |
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| 198 | vpn_t size = vseg->vpn_size; |
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| 199 | for( vpn = base ; vpn < (base+size) ; vpn++ ) |
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| 200 | { |
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| 201 | hal_gpt_get_pte( gpt , vpn , &attr , &ppn ); |
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| 202 | if( attr & GPT_MAPPED ) |
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| 203 | { |
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| 204 | printk(" . vpn = %X / attr = %X / ppn = %X\n", vpn , attr , ppn ); |
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| 205 | } |
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| 206 | } |
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| 207 | } |
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| 208 | } |
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| 209 | |
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| 210 | // release the lock |
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[408] | 211 | remote_rwlock_rd_unlock( XPTR( local_cxy , &vmm->vsegs_lock ) ); |
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[407] | 212 | |
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[408] | 213 | } // vmm_display() |
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| 214 | |
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| 215 | /////////////////////i//////////////////// |
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| 216 | void vmm_update_pte( process_t * process, |
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| 217 | vpn_t vpn, |
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| 218 | uint32_t attr, |
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| 219 | ppn_t ppn ) |
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[23] | 220 | { |
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| 221 | |
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[408] | 222 | xlist_entry_t * process_root_ptr; |
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| 223 | xptr_t process_root_xp; |
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| 224 | xptr_t process_iter_xp; |
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[23] | 225 | |
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[408] | 226 | xptr_t remote_process_xp; |
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| 227 | cxy_t remote_process_cxy; |
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| 228 | process_t * remote_process_ptr; |
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| 229 | xptr_t remote_gpt_xp; |
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[23] | 230 | |
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[408] | 231 | pid_t pid; |
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| 232 | cxy_t owner_cxy; |
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| 233 | lpid_t owner_lpid; |
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[23] | 234 | |
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[408] | 235 | // get extended pointer on root of process copies xlist in owner cluster |
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| 236 | pid = process->pid; |
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| 237 | owner_cxy = CXY_FROM_PID( pid ); |
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| 238 | owner_lpid = LPID_FROM_PID( pid ); |
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| 239 | process_root_ptr = &LOCAL_CLUSTER->pmgr.copies_root[owner_lpid]; |
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| 240 | process_root_xp = XPTR( owner_cxy , process_root_ptr ); |
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[23] | 241 | |
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[408] | 242 | // loop on destination process copies |
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| 243 | XLIST_FOREACH( process_root_xp , process_iter_xp ) |
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| 244 | { |
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| 245 | // get cluster and local pointer on remote process |
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| 246 | remote_process_xp = XLIST_ELEMENT( process_iter_xp , process_t , copies_list ); |
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| 247 | remote_process_ptr = (process_t *)GET_PTR( remote_process_xp ); |
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| 248 | remote_process_cxy = GET_CXY( remote_process_xp ); |
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[407] | 249 | |
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[408] | 250 | // get extended pointer on remote gpt |
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| 251 | remote_gpt_xp = XPTR( remote_process_cxy , &remote_process_ptr->vmm.gpt ); |
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| 252 | |
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| 253 | hal_gpt_update_pte( remote_gpt_xp, |
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| 254 | vpn, |
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| 255 | attr, |
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| 256 | ppn ); |
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| 257 | } |
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| 258 | } // end vmm_update_pte() |
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| 259 | |
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| 260 | /////////////////////////////////////// |
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| 261 | void vmm_set_cow( process_t * process ) |
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| 262 | { |
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| 263 | vmm_t * vmm; |
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| 264 | |
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| 265 | xlist_entry_t * process_root_ptr; |
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| 266 | xptr_t process_root_xp; |
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| 267 | xptr_t process_iter_xp; |
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| 268 | |
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| 269 | xptr_t remote_process_xp; |
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| 270 | cxy_t remote_process_cxy; |
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| 271 | process_t * remote_process_ptr; |
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| 272 | xptr_t remote_gpt_xp; |
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| 273 | |
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| 274 | xptr_t vseg_root_xp; |
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| 275 | xptr_t vseg_iter_xp; |
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| 276 | |
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| 277 | xptr_t vseg_xp; |
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| 278 | vseg_t * vseg; |
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| 279 | |
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| 280 | pid_t pid; |
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| 281 | cxy_t owner_cxy; |
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| 282 | lpid_t owner_lpid; |
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| 283 | |
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| 284 | vmm_dmsg("\n[DBG] %s : core[%x,%d] enters for process %x\n", |
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| 285 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , process->pid ); |
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| 286 | |
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| 287 | // check cluster is reference |
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| 288 | assert( (GET_CXY( process->ref_xp ) == local_cxy) , __FUNCTION__, |
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| 289 | "local cluster is not process reference cluster\n"); |
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| 290 | |
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| 291 | // get pointer on reference VMM |
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| 292 | vmm = &process->vmm; |
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| 293 | |
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| 294 | // get extended pointer on root of process copies xlist in owner cluster |
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| 295 | pid = process->pid; |
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| 296 | owner_cxy = CXY_FROM_PID( pid ); |
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| 297 | owner_lpid = LPID_FROM_PID( pid ); |
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| 298 | process_root_ptr = &LOCAL_CLUSTER->pmgr.copies_root[owner_lpid]; |
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| 299 | process_root_xp = XPTR( owner_cxy , process_root_ptr ); |
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| 300 | |
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| 301 | // get extended pointer on root of vsegs xlist from reference VMM |
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| 302 | vseg_root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
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| 303 | |
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| 304 | // loop on destination process copies |
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| 305 | XLIST_FOREACH( process_root_xp , process_iter_xp ) |
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| 306 | { |
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| 307 | // get cluster and local pointer on remote process |
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| 308 | remote_process_xp = XLIST_ELEMENT( process_iter_xp , process_t , copies_list ); |
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| 309 | remote_process_ptr = (process_t *)GET_PTR( remote_process_xp ); |
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| 310 | remote_process_cxy = GET_CXY( remote_process_xp ); |
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| 311 | |
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| 312 | vmm_dmsg("\n[DBG] %s : core[%x,%d] handling process %x in cluster %x\n", |
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| 313 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , process->pid , remote_process_cxy ); |
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| 314 | |
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| 315 | // get extended pointer on remote gpt |
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| 316 | remote_gpt_xp = XPTR( remote_process_cxy , &remote_process_ptr->vmm.gpt ); |
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| 317 | |
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| 318 | // loop on vsegs in (local) reference process VSL |
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| 319 | XLIST_FOREACH( vseg_root_xp , vseg_iter_xp ) |
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| 320 | { |
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| 321 | // get pointer on vseg |
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| 322 | vseg_xp = XLIST_ELEMENT( vseg_iter_xp , vseg_t , xlist ); |
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| 323 | vseg = (vseg_t *)GET_PTR( vseg_xp ); |
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| 324 | |
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| 325 | assert( (GET_CXY( vseg_xp ) == local_cxy) , __FUNCTION__, |
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| 326 | "all vsegs in reference VSL must be local\n" ); |
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| 327 | |
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| 328 | // get vseg type, base and size |
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| 329 | uint32_t type = vseg->type; |
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| 330 | vpn_t vpn_base = vseg->vpn_base; |
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| 331 | vpn_t vpn_size = vseg->vpn_size; |
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| 332 | |
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| 333 | vmm_dmsg("\n[DBG] %s : core[%x,%d] handling vseg %s / vpn_base = %x / vpn_size = %x\n", |
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| 334 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, vseg_type_str(type), vpn_base, vpn_size ); |
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| 335 | |
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| 336 | // set COW flag on the remote GPT depending on vseg type |
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| 337 | if( (type == VSEG_TYPE_DATA) || |
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| 338 | (type == VSEG_TYPE_ANON) || |
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| 339 | (type == VSEG_TYPE_REMOTE) ) |
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| 340 | { |
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| 341 | hal_gpt_flip_cow( true, // set_cow |
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| 342 | remote_gpt_xp, |
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| 343 | vpn_base, |
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| 344 | vpn_size ); |
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| 345 | } |
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| 346 | } // en loop on vsegs |
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| 347 | } // end loop on process copies |
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| 348 | |
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| 349 | vmm_dmsg("\n[DBG] %s : core[%x,%d] exit for process %x\n", |
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| 350 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , process->pid ); |
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| 351 | |
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| 352 | } // end vmm_set-cow() |
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| 353 | |
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| 354 | ///////////////////////////////////////////////// |
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| 355 | error_t vmm_fork_copy( process_t * child_process, |
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| 356 | xptr_t parent_process_xp ) |
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| 357 | { |
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| 358 | error_t error; |
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| 359 | cxy_t parent_cxy; |
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| 360 | process_t * parent_process; |
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| 361 | vmm_t * parent_vmm; |
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| 362 | xptr_t parent_lock_xp; |
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| 363 | vmm_t * child_vmm; |
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| 364 | xptr_t iter_xp; |
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| 365 | xptr_t parent_vseg_xp; |
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| 366 | vseg_t * parent_vseg; |
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| 367 | vseg_t * child_vseg; |
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| 368 | uint32_t type; |
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| 369 | bool_t cow; |
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| 370 | vpn_t vpn; |
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| 371 | vpn_t vpn_base; |
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| 372 | vpn_t vpn_size; |
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| 373 | xptr_t page_xp; |
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| 374 | page_t * page_ptr; |
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| 375 | cxy_t page_cxy; |
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| 376 | xptr_t parent_root_xp; |
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| 377 | bool_t mapped; |
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| 378 | ppn_t ppn; |
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| 379 | |
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| 380 | vmm_dmsg("\n[DBG] %s : core[%x,%d] enter\n", |
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| 381 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid ); |
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| 382 | |
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| 383 | // get parent process cluster and local pointer |
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| 384 | parent_cxy = GET_CXY( parent_process_xp ); |
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| 385 | parent_process = (process_t *)GET_PTR( parent_process_xp ); |
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| 386 | |
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| 387 | // get local pointers on parent and child VMM |
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| 388 | parent_vmm = &parent_process->vmm; |
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| 389 | child_vmm = &child_process->vmm; |
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| 390 | |
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| 391 | // get extended pointer on lock protecting the parent VSL |
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| 392 | parent_lock_xp = XPTR( parent_cxy , &parent_vmm->vsegs_lock ); |
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| 393 | |
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| 394 | // take the lock protecting the parent VSL |
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| 395 | remote_rwlock_rd_lock( parent_lock_xp ); |
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| 396 | |
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| 397 | // initialize the lock protecting the child VSL |
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| 398 | remote_rwlock_init( XPTR( local_cxy , &child_vmm->vsegs_lock ) ); |
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| 399 | |
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| 400 | // initialize the child VSL as empty |
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| 401 | xlist_root_init( XPTR( local_cxy, &child_vmm->vsegs_root ) ); |
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| 402 | child_vmm->vsegs_nr = 0; |
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| 403 | |
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| 404 | // create & initialize the child GPT as empty |
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| 405 | error = hal_gpt_create( &child_vmm->gpt ); |
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[407] | 406 | if( error ) |
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| 407 | { |
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[408] | 408 | printk("\n[ERROR] in %s : cannot create GPT\n", __FUNCTION__ ); |
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| 409 | return -1; |
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[407] | 410 | } |
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| 411 | |
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[408] | 412 | // build extended pointer on parent VSL |
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| 413 | parent_root_xp = XPTR( parent_cxy , &parent_vmm->vsegs_root ); |
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| 414 | |
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| 415 | // loop on parent VSL xlist |
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| 416 | XLIST_FOREACH( parent_root_xp , iter_xp ) |
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[23] | 417 | { |
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[408] | 418 | // get local and extended pointers on current parent vseg |
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| 419 | parent_vseg_xp = XLIST_ELEMENT( iter_xp , vseg_t , xlist ); |
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| 420 | parent_vseg = (vseg_t *)GET_PTR( parent_vseg_xp ); |
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[23] | 421 | |
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[408] | 422 | // get vseg type |
---|
| 423 | type = hal_remote_lw( XPTR( parent_cxy , &parent_vseg->type ) ); |
---|
| 424 | |
---|
[23] | 425 | |
---|
[408] | 426 | vmm_dmsg("\n[DBG] %s : core[%x,%d] found parent vseg %s / vpn_base = %x\n", |
---|
| 427 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , vseg_type_str(type), |
---|
| 428 | hal_remote_lw( XPTR( parent_cxy , &parent_vseg->vpn_base ) ) ); |
---|
| 429 | |
---|
| 430 | // all parent vsegs - but STACK - must be copied in child VSL |
---|
| 431 | if( type != VSEG_TYPE_STACK ) |
---|
[23] | 432 | { |
---|
[408] | 433 | // allocate memory for a new child vseg |
---|
| 434 | child_vseg = vseg_alloc(); |
---|
| 435 | if( child_vseg == NULL ) // release all allocated vsegs |
---|
[23] | 436 | { |
---|
[408] | 437 | vmm_destroy( child_process ); |
---|
| 438 | printk("\n[ERROR] in %s : cannot create vseg for child\n", __FUNCTION__ ); |
---|
| 439 | return -1; |
---|
[23] | 440 | } |
---|
| 441 | |
---|
[408] | 442 | // copy parent vseg to child vseg |
---|
| 443 | vseg_init_from_ref( child_vseg , parent_vseg_xp ); |
---|
[23] | 444 | |
---|
[408] | 445 | // register child vseg in child VSL |
---|
| 446 | vseg_attach( child_vmm , child_vseg ); |
---|
[407] | 447 | |
---|
[408] | 448 | vmm_dmsg("\n[DBG] %s : core[%x,%d] copied to child VSL : vseg %s / vpn_base = %x\n", |
---|
| 449 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , vseg_type_str(type), |
---|
| 450 | hal_remote_lw( XPTR( parent_cxy , &parent_vseg->vpn_base ) ) ); |
---|
[23] | 451 | |
---|
[408] | 452 | // copy DATA, MMAP, REMOTE, FILE parent GPT entries to child GPT |
---|
| 453 | if( type != VSEG_TYPE_CODE ) |
---|
| 454 | { |
---|
| 455 | // activate the COW for DATA, MMAP, REMOTE vsegs only |
---|
| 456 | cow = ( type != VSEG_TYPE_FILE ); |
---|
[23] | 457 | |
---|
[408] | 458 | vpn_base = child_vseg->vpn_base; |
---|
| 459 | vpn_size = child_vseg->vpn_size; |
---|
[23] | 460 | |
---|
[408] | 461 | // scan pages in parent vseg |
---|
| 462 | for( vpn = vpn_base ; vpn < (vpn_base + vpn_size) ; vpn++ ) |
---|
| 463 | { |
---|
| 464 | error = hal_gpt_pte_copy( &child_vmm->gpt, |
---|
| 465 | XPTR( parent_cxy , &parent_vmm->gpt ), |
---|
| 466 | vpn, |
---|
| 467 | cow, |
---|
| 468 | &ppn, |
---|
| 469 | &mapped ); |
---|
| 470 | if( error ) |
---|
| 471 | { |
---|
| 472 | vmm_destroy( child_process ); |
---|
| 473 | printk("\n[ERROR] in %s : cannot copy GPT\n", __FUNCTION__ ); |
---|
| 474 | return -1; |
---|
| 475 | } |
---|
| 476 | |
---|
| 477 | // increment page descriptor fork_nr for the referenced page if mapped |
---|
| 478 | if( mapped ) |
---|
| 479 | { |
---|
| 480 | page_xp = ppm_ppn2page( ppn ); |
---|
| 481 | page_cxy = GET_CXY( page_xp ); |
---|
| 482 | page_ptr = (page_t *)GET_PTR( page_xp ); |
---|
| 483 | hal_remote_atomic_add( XPTR( page_cxy , &page_ptr->fork_nr ) , 1 ); |
---|
| 484 | |
---|
| 485 | vmm_dmsg("\n[DBG] %s : core[%x,%d] copied to child GPT : vpn %x\n", |
---|
| 486 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , vpn ); |
---|
| 487 | |
---|
| 488 | } |
---|
| 489 | } |
---|
| 490 | } // end if no code & no stack |
---|
| 491 | } // end if no stack |
---|
| 492 | } // end loop on vsegs |
---|
| 493 | |
---|
| 494 | // release the parent vsegs lock |
---|
| 495 | remote_rwlock_rd_unlock( parent_lock_xp ); |
---|
| 496 | |
---|
| 497 | // initialize the child VMM STACK allocator |
---|
| 498 | child_vmm->stack_mgr.bitmap = 0; |
---|
| 499 | child_vmm->stack_mgr.vpn_base = CONFIG_VMM_STACK_BASE; |
---|
| 500 | |
---|
| 501 | // initialize the child VMM MMAP allocator |
---|
[23] | 502 | uint32_t i; |
---|
[408] | 503 | child_vmm->mmap_mgr.vpn_base = CONFIG_VMM_HEAP_BASE; |
---|
| 504 | child_vmm->mmap_mgr.vpn_size = CONFIG_VMM_STACK_BASE - CONFIG_VMM_HEAP_BASE; |
---|
| 505 | child_vmm->mmap_mgr.first_free_vpn = CONFIG_VMM_HEAP_BASE; |
---|
| 506 | for( i = 0 ; i < 32 ; i++ ) list_root_init( &child_vmm->mmap_mgr.zombi_list[i] ); |
---|
[23] | 507 | |
---|
[178] | 508 | // initialize instrumentation counters |
---|
[408] | 509 | child_vmm->pgfault_nr = 0; |
---|
[23] | 510 | |
---|
[408] | 511 | // copy base addresses from parent VMM to child VMM |
---|
| 512 | child_vmm->kent_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->kent_vpn_base)); |
---|
| 513 | child_vmm->args_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->args_vpn_base)); |
---|
| 514 | child_vmm->envs_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->envs_vpn_base)); |
---|
| 515 | child_vmm->heap_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->heap_vpn_base)); |
---|
| 516 | child_vmm->code_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->code_vpn_base)); |
---|
| 517 | child_vmm->data_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->data_vpn_base)); |
---|
[23] | 518 | |
---|
[408] | 519 | child_vmm->entry_point = (intptr_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->entry_point)); |
---|
[23] | 520 | |
---|
[124] | 521 | hal_fence(); |
---|
[23] | 522 | |
---|
| 523 | return 0; |
---|
| 524 | |
---|
[408] | 525 | } // vmm_fork_copy() |
---|
[204] | 526 | |
---|
[1] | 527 | /////////////////////////////////////// |
---|
| 528 | void vmm_destroy( process_t * process ) |
---|
| 529 | { |
---|
[408] | 530 | xptr_t vseg_xp; |
---|
[1] | 531 | vseg_t * vseg; |
---|
| 532 | |
---|
| 533 | // get pointer on VMM |
---|
| 534 | vmm_t * vmm = &process->vmm; |
---|
| 535 | |
---|
[408] | 536 | // get extended pointer on VSL root and VSL lock |
---|
| 537 | xptr_t root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
---|
| 538 | xptr_t lock_xp = XPTR( local_cxy , &vmm->vsegs_lock ); |
---|
| 539 | |
---|
[1] | 540 | // get lock protecting vseg list |
---|
[408] | 541 | remote_rwlock_wr_lock( lock_xp ); |
---|
[1] | 542 | |
---|
[408] | 543 | // remove all vsegs registered in VSL |
---|
| 544 | while( !xlist_is_empty( root_xp ) ) |
---|
[1] | 545 | { |
---|
[408] | 546 | vseg_xp = XLIST_FIRST_ELEMENT( root_xp , vseg_t , xlist ); |
---|
| 547 | vseg = (vseg_t *)GET_PTR( vseg_xp ); |
---|
[1] | 548 | vseg_detach( vmm , vseg ); |
---|
| 549 | vseg_free( vseg ); |
---|
| 550 | } |
---|
| 551 | |
---|
| 552 | // release lock |
---|
[408] | 553 | remote_rwlock_wr_unlock( lock_xp ); |
---|
[1] | 554 | |
---|
| 555 | // remove all vsegs from zombi_lists in MMAP allocator |
---|
| 556 | uint32_t i; |
---|
| 557 | for( i = 0 ; i<32 ; i++ ) |
---|
| 558 | { |
---|
| 559 | while( !list_is_empty( &vmm->mmap_mgr.zombi_list[i] ) ) |
---|
| 560 | { |
---|
[408] | 561 | vseg = LIST_FIRST( &vmm->mmap_mgr.zombi_list[i] , vseg_t , zlist ); |
---|
[1] | 562 | vseg_detach( vmm , vseg ); |
---|
| 563 | vseg_free( vseg ); |
---|
| 564 | } |
---|
| 565 | } |
---|
| 566 | |
---|
| 567 | // release memory allocated to the local page table |
---|
| 568 | hal_gpt_destroy( &vmm->gpt ); |
---|
| 569 | |
---|
[204] | 570 | } // end vmm_destroy() |
---|
| 571 | |
---|
[1] | 572 | ///////////////////////////////////////////////// |
---|
| 573 | vseg_t * vmm_check_conflict( process_t * process, |
---|
[21] | 574 | vpn_t vpn_base, |
---|
[1] | 575 | vpn_t vpn_size ) |
---|
| 576 | { |
---|
| 577 | vmm_t * vmm = &process->vmm; |
---|
[408] | 578 | |
---|
| 579 | // scan the VSL |
---|
[1] | 580 | vseg_t * vseg; |
---|
[408] | 581 | xptr_t iter_xp; |
---|
| 582 | xptr_t vseg_xp; |
---|
| 583 | xptr_t root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
---|
[1] | 584 | |
---|
[408] | 585 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
[1] | 586 | { |
---|
[408] | 587 | vseg_xp = XLIST_ELEMENT( iter_xp , vseg_t , xlist ); |
---|
| 588 | vseg = (vseg_t *)GET_PTR( vseg_xp ); |
---|
[204] | 589 | |
---|
[21] | 590 | if( ((vpn_base + vpn_size) > vseg->vpn_base) && |
---|
| 591 | (vpn_base < (vseg->vpn_base + vseg->vpn_size)) ) return vseg; |
---|
[1] | 592 | } |
---|
| 593 | return NULL; |
---|
| 594 | |
---|
[204] | 595 | } // end vmm_check_conflict() |
---|
| 596 | |
---|
[1] | 597 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 598 | // This static function is called by the vmm_create_vseg() function, and implements |
---|
| 599 | // the VMM stack_vseg specific allocator. |
---|
| 600 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 601 | // @ vmm : pointer on VMM. |
---|
[21] | 602 | // @ vpn_base : (return value) first allocated page |
---|
[1] | 603 | // @ vpn_size : (return value) number of allocated pages |
---|
| 604 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 605 | static error_t vmm_stack_alloc( vmm_t * vmm, |
---|
| 606 | vpn_t * vpn_base, |
---|
| 607 | vpn_t * vpn_size ) |
---|
| 608 | { |
---|
| 609 | // get stack allocator pointer |
---|
| 610 | stack_mgr_t * mgr = &vmm->stack_mgr; |
---|
| 611 | |
---|
| 612 | // get lock on stack allocator |
---|
| 613 | spinlock_lock( &mgr->lock ); |
---|
| 614 | |
---|
| 615 | // get first free slot index in bitmap |
---|
| 616 | int32_t index = bitmap_ffc( &mgr->bitmap , 4 ); |
---|
[179] | 617 | if( (index < 0) || (index > 31) ) |
---|
| 618 | { |
---|
| 619 | spinlock_unlock( &mgr->lock ); |
---|
| 620 | return ENOMEM; |
---|
| 621 | } |
---|
[1] | 622 | |
---|
| 623 | // update bitmap |
---|
| 624 | bitmap_set( &mgr->bitmap , index ); |
---|
[21] | 625 | |
---|
[1] | 626 | // release lock on stack allocator |
---|
| 627 | spinlock_unlock( &mgr->lock ); |
---|
| 628 | |
---|
[21] | 629 | // returns vpn_base, vpn_size (one page non allocated) |
---|
[1] | 630 | *vpn_base = mgr->vpn_base + index * CONFIG_VMM_STACK_SIZE + 1; |
---|
| 631 | *vpn_size = CONFIG_VMM_STACK_SIZE - 1; |
---|
| 632 | return 0; |
---|
| 633 | |
---|
[204] | 634 | } // end vmm_stack_alloc() |
---|
| 635 | |
---|
[1] | 636 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 637 | // This static function is called by the vmm_create_vseg() function, and implements |
---|
| 638 | // the VMM MMAP specific allocator. |
---|
| 639 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 640 | // @ vmm : [in] pointer on VMM. |
---|
| 641 | // @ npages : [in] requested number of pages. |
---|
[21] | 642 | // @ vpn_base : [out] first allocated page. |
---|
[1] | 643 | // @ vpn_size : [out] actual number of allocated pages. |
---|
| 644 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 645 | static error_t vmm_mmap_alloc( vmm_t * vmm, |
---|
| 646 | vpn_t npages, |
---|
| 647 | vpn_t * vpn_base, |
---|
| 648 | vpn_t * vpn_size ) |
---|
| 649 | { |
---|
| 650 | uint32_t index; |
---|
| 651 | vseg_t * vseg; |
---|
| 652 | vpn_t base; |
---|
| 653 | vpn_t size; |
---|
[21] | 654 | vpn_t free; |
---|
[1] | 655 | |
---|
[21] | 656 | // mmap vseg size must be power of 2 |
---|
[1] | 657 | // compute actual size and index in zombi_list array |
---|
| 658 | size = POW2_ROUNDUP( npages ); |
---|
| 659 | index = bits_log2( size ); |
---|
| 660 | |
---|
| 661 | // get mmap allocator pointer |
---|
| 662 | mmap_mgr_t * mgr = &vmm->mmap_mgr; |
---|
| 663 | |
---|
| 664 | // get lock on mmap allocator |
---|
| 665 | spinlock_lock( &mgr->lock ); |
---|
| 666 | |
---|
| 667 | // get vseg from zombi_list or from mmap zone |
---|
| 668 | if( list_is_empty( &mgr->zombi_list[index] ) ) // from mmap zone |
---|
| 669 | { |
---|
| 670 | // check overflow |
---|
| 671 | free = mgr->first_free_vpn; |
---|
| 672 | if( (free + size) > mgr->vpn_size ) return ENOMEM; |
---|
| 673 | |
---|
| 674 | // update STACK allocator |
---|
| 675 | mgr->first_free_vpn += size; |
---|
| 676 | |
---|
| 677 | // compute base |
---|
| 678 | base = free; |
---|
| 679 | } |
---|
| 680 | else // from zombi_list |
---|
| 681 | { |
---|
| 682 | // get pointer on zombi vseg from zombi_list |
---|
[408] | 683 | vseg = LIST_FIRST( &mgr->zombi_list[index] , vseg_t , zlist ); |
---|
[1] | 684 | |
---|
| 685 | // remove vseg from free-list |
---|
[408] | 686 | list_unlink( &vseg->zlist ); |
---|
[1] | 687 | |
---|
| 688 | // compute base |
---|
| 689 | base = vseg->vpn_base; |
---|
[21] | 690 | } |
---|
| 691 | |
---|
[1] | 692 | // release lock on mmap allocator |
---|
| 693 | spinlock_unlock( &mgr->lock ); |
---|
| 694 | |
---|
| 695 | // returns vpn_base, vpn_size |
---|
| 696 | *vpn_base = base; |
---|
| 697 | *vpn_size = size; |
---|
| 698 | return 0; |
---|
| 699 | |
---|
[204] | 700 | } // end vmm_mmap_alloc() |
---|
| 701 | |
---|
[407] | 702 | //////////////////////////////////////////////// |
---|
| 703 | vseg_t * vmm_create_vseg( process_t * process, |
---|
| 704 | vseg_type_t type, |
---|
| 705 | intptr_t base, |
---|
| 706 | uint32_t size, |
---|
| 707 | uint32_t file_offset, |
---|
| 708 | uint32_t file_size, |
---|
| 709 | xptr_t mapper_xp, |
---|
| 710 | cxy_t cxy ) |
---|
[1] | 711 | { |
---|
| 712 | vseg_t * vseg; // created vseg pointer |
---|
[204] | 713 | vpn_t vpn_base; // first page index |
---|
[1] | 714 | vpn_t vpn_size; // number of pages |
---|
| 715 | error_t error; |
---|
| 716 | |
---|
[407] | 717 | vmm_dmsg("\n[DBG] %s : core[%x,%d] enters / process %x / base %x / size %x / %s / cxy = %x\n", |
---|
| 718 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , |
---|
| 719 | process->pid , base , size , vseg_type_str(type) , cxy ); |
---|
[21] | 720 | |
---|
[407] | 721 | // get pointer on VMM |
---|
| 722 | vmm_t * vmm = &process->vmm; |
---|
[21] | 723 | |
---|
[204] | 724 | // compute base, size, vpn_base, vpn_size, depending on vseg type |
---|
[407] | 725 | // we use the VMM specific allocators for "stack", "file", "anon", & "remote" vsegs |
---|
[1] | 726 | if( type == VSEG_TYPE_STACK ) |
---|
| 727 | { |
---|
| 728 | // get vpn_base and vpn_size from STACK allocator |
---|
| 729 | error = vmm_stack_alloc( vmm , &vpn_base , &vpn_size ); |
---|
| 730 | if( error ) |
---|
| 731 | { |
---|
[407] | 732 | printk("\n[ERROR] in %s : no space for stack vseg / process %x in cluster %x\n", |
---|
| 733 | __FUNCTION__ , process->pid , local_cxy ); |
---|
[1] | 734 | return NULL; |
---|
| 735 | } |
---|
| 736 | |
---|
| 737 | // compute vseg base and size from vpn_base and vpn_size |
---|
| 738 | base = vpn_base << CONFIG_PPM_PAGE_SHIFT; |
---|
| 739 | size = vpn_size << CONFIG_PPM_PAGE_SHIFT; |
---|
| 740 | } |
---|
[21] | 741 | else if( (type == VSEG_TYPE_ANON) || |
---|
| 742 | (type == VSEG_TYPE_FILE) || |
---|
[1] | 743 | (type == VSEG_TYPE_REMOTE) ) |
---|
| 744 | { |
---|
| 745 | // get vpn_base and vpn_size from MMAP allocator |
---|
| 746 | vpn_t npages = size >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 747 | error = vmm_mmap_alloc( vmm , npages , &vpn_base , &vpn_size ); |
---|
| 748 | if( error ) |
---|
| 749 | { |
---|
| 750 | printk("\n[ERROR] in %s : no vspace for mmap vseg / process %x in cluster %x\n", |
---|
| 751 | __FUNCTION__ , process->pid , local_cxy ); |
---|
| 752 | return NULL; |
---|
| 753 | } |
---|
| 754 | |
---|
| 755 | // compute vseg base and size from vpn_base and vpn_size |
---|
| 756 | base = vpn_base << CONFIG_PPM_PAGE_SHIFT; |
---|
| 757 | size = vpn_size << CONFIG_PPM_PAGE_SHIFT; |
---|
| 758 | } |
---|
| 759 | else |
---|
| 760 | { |
---|
[204] | 761 | uint32_t vpn_min = base >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 762 | uint32_t vpn_max = (base + size - 1) >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 763 | |
---|
| 764 | vpn_base = vpn_min; |
---|
| 765 | vpn_size = vpn_max - vpn_min + 1; |
---|
[1] | 766 | } |
---|
| 767 | |
---|
| 768 | // check collisions |
---|
| 769 | vseg = vmm_check_conflict( process , vpn_base , vpn_size ); |
---|
| 770 | if( vseg != NULL ) |
---|
| 771 | { |
---|
[21] | 772 | printk("\n[ERROR] in %s for process %x : new vseg [vpn_base = %x / vpn_size = %x]\n" |
---|
[1] | 773 | " overlap existing vseg [vpn_base = %x / vpn_size = %x]\n", |
---|
[407] | 774 | __FUNCTION__ , process->pid, vpn_base, vpn_size, vseg->vpn_base, vseg->vpn_size ); |
---|
[1] | 775 | return NULL; |
---|
| 776 | } |
---|
| 777 | |
---|
| 778 | // allocate physical memory for vseg descriptor |
---|
| 779 | vseg = vseg_alloc(); |
---|
| 780 | if( vseg == NULL ) |
---|
| 781 | { |
---|
| 782 | printk("\n[ERROR] in %s for process %x : cannot allocate memory for vseg\n", |
---|
[407] | 783 | __FUNCTION__ , process->pid ); |
---|
[1] | 784 | return NULL; |
---|
| 785 | } |
---|
| 786 | |
---|
| 787 | // initialize vseg descriptor |
---|
[407] | 788 | vseg_init( vseg, |
---|
| 789 | type, |
---|
| 790 | base, |
---|
| 791 | size, |
---|
| 792 | vpn_base, |
---|
| 793 | vpn_size, |
---|
| 794 | file_offset, |
---|
| 795 | file_size, |
---|
| 796 | mapper_xp, |
---|
| 797 | cxy ); |
---|
[1] | 798 | |
---|
[408] | 799 | // attach vseg to VSL |
---|
| 800 | xptr_t lock_xp = XPTR( local_cxy , &vmm->vsegs_lock ); |
---|
| 801 | remote_rwlock_wr_lock( lock_xp ); |
---|
[1] | 802 | vseg_attach( vmm , vseg ); |
---|
[408] | 803 | remote_rwlock_wr_unlock( lock_xp ); |
---|
[1] | 804 | |
---|
[407] | 805 | vmm_dmsg("\n[DBG] %s : core[%x,%d] exit / process %x / base %x / size %x / type %s\n", |
---|
| 806 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , |
---|
| 807 | process->pid , base , size , vseg_type_str(type) ); |
---|
[21] | 808 | |
---|
[1] | 809 | return vseg; |
---|
| 810 | |
---|
[406] | 811 | } // vmm_create_vseg() |
---|
| 812 | |
---|
[1] | 813 | ///////////////////////////////////// |
---|
| 814 | void vmm_remove_vseg( vseg_t * vseg ) |
---|
| 815 | { |
---|
| 816 | // get pointers on calling process and VMM |
---|
| 817 | thread_t * this = CURRENT_THREAD; |
---|
| 818 | process_t * process = this->process; |
---|
| 819 | vmm_t * vmm = &this->process->vmm; |
---|
| 820 | uint32_t type = vseg->type; |
---|
| 821 | |
---|
[408] | 822 | // detach vseg from VSL |
---|
| 823 | xptr_t lock_xp = XPTR( local_cxy , &vmm->vsegs_lock ); |
---|
| 824 | remote_rwlock_wr_lock( lock_xp ); |
---|
| 825 | vseg_detach( &process->vmm , vseg ); |
---|
| 826 | remote_rwlock_wr_unlock( lock_xp ); |
---|
[1] | 827 | |
---|
| 828 | // release the stack slot to VMM stack allocator if STACK type |
---|
| 829 | if( type == VSEG_TYPE_STACK ) |
---|
| 830 | { |
---|
| 831 | // get pointer on stack allocator |
---|
| 832 | stack_mgr_t * mgr = &vmm->stack_mgr; |
---|
| 833 | |
---|
| 834 | // compute slot index |
---|
| 835 | uint32_t index = ((vseg->vpn_base - mgr->vpn_base - 1) / CONFIG_VMM_STACK_SIZE); |
---|
| 836 | |
---|
| 837 | // update stacks_bitmap |
---|
| 838 | spinlock_lock( &mgr->lock ); |
---|
| 839 | bitmap_clear( &mgr->bitmap , index ); |
---|
| 840 | spinlock_unlock( &mgr->lock ); |
---|
| 841 | } |
---|
| 842 | |
---|
| 843 | // release the vseg to VMM mmap allocator if MMAP type |
---|
| 844 | if( (type == VSEG_TYPE_ANON) || (type == VSEG_TYPE_FILE) || (type == VSEG_TYPE_REMOTE) ) |
---|
| 845 | { |
---|
| 846 | // get pointer on mmap allocator |
---|
| 847 | mmap_mgr_t * mgr = &vmm->mmap_mgr; |
---|
| 848 | |
---|
| 849 | // compute zombi_list index |
---|
| 850 | uint32_t index = bits_log2( vseg->vpn_size ); |
---|
| 851 | |
---|
| 852 | // update zombi_list |
---|
| 853 | spinlock_lock( &mgr->lock ); |
---|
[408] | 854 | list_add_first( &mgr->zombi_list[index] , &vseg->zlist ); |
---|
[1] | 855 | spinlock_unlock( &mgr->lock ); |
---|
| 856 | } |
---|
| 857 | |
---|
| 858 | // release physical memory allocated for vseg descriptor if no MMAP type |
---|
| 859 | if( (type != VSEG_TYPE_ANON) && (type != VSEG_TYPE_FILE) && (type != VSEG_TYPE_REMOTE) ) |
---|
| 860 | { |
---|
| 861 | vseg_free( vseg ); |
---|
| 862 | } |
---|
[407] | 863 | } // end vmm_remove_vseg() |
---|
[1] | 864 | |
---|
[68] | 865 | ////////////////////////////////////////////// |
---|
| 866 | error_t vmm_map_kernel_vseg( vseg_t * vseg, |
---|
| 867 | uint32_t attr ) |
---|
[1] | 868 | { |
---|
| 869 | vpn_t vpn; // VPN of PTE to be set |
---|
| 870 | vpn_t vpn_min; // VPN of first PTE to be set |
---|
| 871 | vpn_t vpn_max; // VPN of last PTE to be set (excluded) |
---|
| 872 | ppn_t ppn; // PPN of allocated physical page |
---|
| 873 | uint32_t order; // ln( number of small pages for one single PTE ) |
---|
| 874 | page_t * page; |
---|
| 875 | error_t error; |
---|
| 876 | |
---|
[68] | 877 | // check vseg type : must be a kernel vseg |
---|
[1] | 878 | uint32_t type = vseg->type; |
---|
[68] | 879 | assert( ((type==VSEG_TYPE_KCODE) || (type==VSEG_TYPE_KDATA) || (type==VSEG_TYPE_KDEV)), |
---|
| 880 | __FUNCTION__ , "not a kernel vseg\n" ); |
---|
[1] | 881 | |
---|
| 882 | // get pointer on page table |
---|
| 883 | gpt_t * gpt = &process_zero.vmm.gpt; |
---|
| 884 | |
---|
[21] | 885 | // define number of small pages per PTE |
---|
[1] | 886 | if( attr & GPT_SMALL ) order = 0; // 1 small page |
---|
| 887 | else order = 9; // 512 small pages |
---|
| 888 | |
---|
| 889 | // loop on pages in vseg |
---|
| 890 | vpn_min = vseg->vpn_base; |
---|
| 891 | vpn_max = vpn_min + vseg->vpn_size; |
---|
| 892 | for( vpn = vpn_min ; vpn < vpn_max ; vpn++ ) |
---|
| 893 | { |
---|
[68] | 894 | // allocate a physical page from local PPM |
---|
[1] | 895 | kmem_req_t req; |
---|
| 896 | req.type = KMEM_PAGE; |
---|
| 897 | req.size = order; |
---|
| 898 | req.flags = AF_KERNEL | AF_ZERO; |
---|
| 899 | page = (page_t *)kmem_alloc( &req ); |
---|
[21] | 900 | if( page == NULL ) |
---|
[1] | 901 | { |
---|
| 902 | printk("\n[ERROR] in %s : cannot allocate physical memory\n", __FUNCTION__ ); |
---|
| 903 | return ENOMEM; |
---|
| 904 | } |
---|
| 905 | |
---|
| 906 | // set page table entry |
---|
[315] | 907 | ppn = ppm_page2ppn( XPTR( local_cxy , page ) ); |
---|
[408] | 908 | error = hal_gpt_set_pte( gpt, |
---|
| 909 | vpn, |
---|
| 910 | attr, |
---|
| 911 | ppn ); |
---|
[21] | 912 | if( error ) |
---|
[1] | 913 | { |
---|
| 914 | printk("\n[ERROR] in %s : cannot register PPE\n", __FUNCTION__ ); |
---|
| 915 | return ENOMEM; |
---|
| 916 | } |
---|
| 917 | } |
---|
[21] | 918 | |
---|
[1] | 919 | return 0; |
---|
| 920 | |
---|
[408] | 921 | } // end vmm_map_kernel_vseg() |
---|
| 922 | |
---|
[1] | 923 | ///////////////////////////////////////// |
---|
| 924 | void vmm_unmap_vseg( process_t * process, |
---|
| 925 | vseg_t * vseg ) |
---|
| 926 | { |
---|
[21] | 927 | vpn_t vpn; // VPN of current PTE |
---|
| 928 | vpn_t vpn_min; // VPN of first PTE |
---|
[1] | 929 | vpn_t vpn_max; // VPN of last PTE (excluded) |
---|
| 930 | |
---|
| 931 | // get pointer on process page table |
---|
| 932 | gpt_t * gpt = &process->vmm.gpt; |
---|
| 933 | |
---|
| 934 | // loop on pages in vseg |
---|
| 935 | vpn_min = vseg->vpn_base; |
---|
| 936 | vpn_max = vpn_min + vseg->vpn_size; |
---|
| 937 | for( vpn = vpn_min ; vpn < vpn_max ; vpn++ ) |
---|
| 938 | { |
---|
| 939 | hal_gpt_reset_pte( gpt , vpn ); |
---|
| 940 | } |
---|
[178] | 941 | } |
---|
[1] | 942 | |
---|
[407] | 943 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
[406] | 944 | // This low-level static function is called by the vmm_get_vseg() and vmm_resize_vseg() |
---|
| 945 | // functions. It scan the list of registered vsegs to find the unique vseg containing |
---|
| 946 | // a given virtual address. |
---|
[407] | 947 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
[406] | 948 | // @ vmm : pointer on the process VMM. |
---|
| 949 | // @ vaddr : virtual address. |
---|
| 950 | // @ return vseg pointer if success / return NULL if not found. |
---|
[407] | 951 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
[406] | 952 | static vseg_t * vseg_from_vaddr( vmm_t * vmm, |
---|
| 953 | intptr_t vaddr ) |
---|
| 954 | { |
---|
[408] | 955 | xptr_t iter_xp; |
---|
| 956 | xptr_t vseg_xp; |
---|
| 957 | vseg_t * vseg; |
---|
[406] | 958 | |
---|
[408] | 959 | // get extended pointers on VSL lock and root |
---|
| 960 | xptr_t lock_xp = XPTR( local_cxy , &vmm->vsegs_lock ); |
---|
| 961 | xptr_t root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
---|
[406] | 962 | |
---|
[408] | 963 | // get lock protecting the VSL |
---|
| 964 | remote_rwlock_rd_lock( lock_xp ); |
---|
| 965 | |
---|
| 966 | // scan the list of vsegs in VSL |
---|
| 967 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
[406] | 968 | { |
---|
[408] | 969 | vseg_xp = XLIST_ELEMENT( iter_xp , vseg_t , xlist ); |
---|
| 970 | vseg = (vseg_t *)GET_PTR( vseg_xp ); |
---|
| 971 | if( (vaddr >= vseg->min) && (vaddr < vseg->max) ) |
---|
| 972 | { |
---|
| 973 | // return success |
---|
| 974 | remote_rwlock_rd_unlock( lock_xp ); |
---|
| 975 | return vseg; |
---|
| 976 | } |
---|
[406] | 977 | } |
---|
| 978 | |
---|
[408] | 979 | // return failure |
---|
| 980 | remote_rwlock_rd_unlock( lock_xp ); |
---|
| 981 | return NULL; |
---|
[406] | 982 | |
---|
[408] | 983 | } // end vseg_from_vaddr() |
---|
[406] | 984 | |
---|
[1] | 985 | ///////////////////////////////////////////// |
---|
| 986 | error_t vmm_resize_vseg( process_t * process, |
---|
| 987 | intptr_t base, |
---|
| 988 | intptr_t size ) |
---|
| 989 | { |
---|
[406] | 990 | error_t error; |
---|
| 991 | vseg_t * new; |
---|
| 992 | vpn_t vpn_min; |
---|
| 993 | vpn_t vpn_max; |
---|
[1] | 994 | |
---|
| 995 | // get pointer on process VMM |
---|
| 996 | vmm_t * vmm = &process->vmm; |
---|
| 997 | |
---|
| 998 | intptr_t addr_min = base; |
---|
| 999 | intptr_t addr_max = base + size; |
---|
| 1000 | |
---|
| 1001 | // get pointer on vseg |
---|
[406] | 1002 | vseg_t * vseg = vseg_from_vaddr( vmm , base ); |
---|
[1] | 1003 | |
---|
| 1004 | if( vseg == NULL) return EINVAL; |
---|
[21] | 1005 | |
---|
[408] | 1006 | // get extended pointer on VSL lock |
---|
| 1007 | xptr_t lock_xp = XPTR( local_cxy , &vmm->vsegs_lock ); |
---|
[21] | 1008 | |
---|
[408] | 1009 | // get lock protecting VSL |
---|
| 1010 | remote_rwlock_wr_lock( lock_xp ); |
---|
| 1011 | |
---|
[1] | 1012 | if( (vseg->min > addr_min) || (vseg->max < addr_max) ) // region not included in vseg |
---|
| 1013 | { |
---|
| 1014 | error = EINVAL; |
---|
| 1015 | } |
---|
| 1016 | else if( (vseg->min == addr_min) && (vseg->max == addr_max) ) // vseg must be removed |
---|
| 1017 | { |
---|
| 1018 | vmm_remove_vseg( vseg ); |
---|
| 1019 | error = 0; |
---|
| 1020 | } |
---|
[406] | 1021 | else if( vseg->min == addr_min ) // vseg must be resized |
---|
[1] | 1022 | { |
---|
[406] | 1023 | // update vseg base address |
---|
| 1024 | vseg->min = addr_max; |
---|
| 1025 | |
---|
| 1026 | // update vpn_base and vpn_size |
---|
| 1027 | vpn_min = vseg->min >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1028 | vpn_max = (vseg->max - 1) >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1029 | vseg->vpn_base = vpn_min; |
---|
| 1030 | vseg->vpn_size = vpn_max - vpn_min + 1; |
---|
| 1031 | error = 0; |
---|
[1] | 1032 | } |
---|
[406] | 1033 | else if( vseg->max == addr_max ) // vseg must be resized |
---|
[1] | 1034 | { |
---|
[406] | 1035 | // update vseg max address |
---|
| 1036 | vseg->max = addr_min; |
---|
| 1037 | |
---|
| 1038 | // update vpn_base and vpn_size |
---|
| 1039 | vpn_min = vseg->min >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1040 | vpn_max = (vseg->max - 1) >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1041 | vseg->vpn_base = vpn_min; |
---|
| 1042 | vseg->vpn_size = vpn_max - vpn_min + 1; |
---|
| 1043 | error = 0; |
---|
[1] | 1044 | } |
---|
[406] | 1045 | else // vseg cut in three regions |
---|
[1] | 1046 | { |
---|
[406] | 1047 | // resize existing vseg |
---|
| 1048 | vseg->max = addr_min; |
---|
| 1049 | |
---|
| 1050 | // update vpn_base and vpn_size |
---|
| 1051 | vpn_min = vseg->min >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1052 | vpn_max = (vseg->max - 1) >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1053 | vseg->vpn_base = vpn_min; |
---|
| 1054 | vseg->vpn_size = vpn_max - vpn_min + 1; |
---|
| 1055 | |
---|
| 1056 | // create new vseg |
---|
[407] | 1057 | new = vmm_create_vseg( process, |
---|
| 1058 | vseg->type, |
---|
| 1059 | addr_min, |
---|
| 1060 | (vseg->max - addr_max), |
---|
| 1061 | vseg->file_offset, |
---|
| 1062 | vseg->file_size, |
---|
| 1063 | vseg->mapper_xp, |
---|
| 1064 | vseg->cxy ); |
---|
| 1065 | |
---|
[406] | 1066 | if( new == NULL ) error = EINVAL; |
---|
| 1067 | else error = 0; |
---|
[1] | 1068 | } |
---|
| 1069 | |
---|
| 1070 | // release VMM lock |
---|
[408] | 1071 | remote_rwlock_wr_unlock( lock_xp ); |
---|
[1] | 1072 | |
---|
| 1073 | return error; |
---|
| 1074 | |
---|
[406] | 1075 | } // vmm_resize_vseg() |
---|
| 1076 | |
---|
[1] | 1077 | /////////////////////////////////////////// |
---|
[388] | 1078 | error_t vmm_get_vseg( process_t * process, |
---|
[394] | 1079 | intptr_t vaddr, |
---|
[388] | 1080 | vseg_t ** found_vseg ) |
---|
[1] | 1081 | { |
---|
[406] | 1082 | vmm_t * vmm = &process->vmm; |
---|
[1] | 1083 | |
---|
[406] | 1084 | // get vseg from vaddr |
---|
| 1085 | vseg_t * vseg = vseg_from_vaddr( vmm , vaddr ); |
---|
[1] | 1086 | |
---|
[388] | 1087 | if( vseg == NULL ) // vseg not found in local cluster => try to get it from ref |
---|
| 1088 | { |
---|
| 1089 | // get extended pointer on reference process |
---|
| 1090 | xptr_t ref_xp = process->ref_xp; |
---|
[1] | 1091 | |
---|
[388] | 1092 | // get cluster and local pointer on reference process |
---|
| 1093 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
| 1094 | process_t * ref_ptr = (process_t *)GET_PTR( ref_xp ); |
---|
| 1095 | |
---|
| 1096 | if( local_cxy == ref_cxy ) return -1; // local cluster is the reference |
---|
| 1097 | |
---|
| 1098 | // get extended pointer on reference vseg |
---|
| 1099 | xptr_t vseg_xp; |
---|
| 1100 | error_t error; |
---|
[406] | 1101 | |
---|
[394] | 1102 | rpc_vmm_get_vseg_client( ref_cxy , ref_ptr , vaddr , &vseg_xp , &error ); |
---|
[388] | 1103 | |
---|
| 1104 | if( error ) return -1; // vseg not found => illegal user vaddr |
---|
| 1105 | |
---|
| 1106 | // allocate a vseg in local cluster |
---|
| 1107 | vseg = vseg_alloc(); |
---|
| 1108 | |
---|
[406] | 1109 | if( vseg == NULL ) return -1; |
---|
[388] | 1110 | |
---|
| 1111 | // initialise local vseg from reference |
---|
| 1112 | vseg_init_from_ref( vseg , vseg_xp ); |
---|
| 1113 | |
---|
| 1114 | // register local vseg in local VMM |
---|
[406] | 1115 | vseg_attach( &process->vmm , vseg ); |
---|
[388] | 1116 | } |
---|
| 1117 | |
---|
| 1118 | // success |
---|
| 1119 | *found_vseg = vseg; |
---|
[394] | 1120 | return 0; |
---|
[388] | 1121 | |
---|
| 1122 | } // end vmm_get_vseg() |
---|
| 1123 | |
---|
[407] | 1124 | ////////////////////////////////////////////////////////////////////////////////////// |
---|
| 1125 | // This static function compute the target cluster to allocate a physical page |
---|
| 1126 | // for a given <vpn> in a given <vseg>, allocates the page (with an RPC if required) |
---|
| 1127 | // and returns an extended pointer on the allocated page descriptor. |
---|
| 1128 | // The vseg cannot have the FILE type. |
---|
| 1129 | ////////////////////////////////////////////////////////////////////////////////////// |
---|
| 1130 | static xptr_t vmm_page_allocate( vseg_t * vseg, |
---|
| 1131 | vpn_t vpn ) |
---|
| 1132 | { |
---|
| 1133 | // compute target cluster |
---|
| 1134 | page_t * page_ptr; |
---|
| 1135 | cxy_t page_cxy; |
---|
| 1136 | kmem_req_t req; |
---|
| 1137 | |
---|
| 1138 | uint32_t type = vseg->type; |
---|
| 1139 | uint32_t flags = vseg->flags; |
---|
| 1140 | |
---|
| 1141 | assert( ( type != VSEG_TYPE_FILE ) , __FUNCTION__ , "illegal vseg type\n" ); |
---|
| 1142 | |
---|
| 1143 | if( flags & VSEG_DISTRIB ) // distributed => cxy depends on vpn LSB |
---|
| 1144 | { |
---|
| 1145 | uint32_t x_size = LOCAL_CLUSTER->x_size; |
---|
| 1146 | uint32_t y_size = LOCAL_CLUSTER->y_size; |
---|
| 1147 | uint32_t y_width = LOCAL_CLUSTER->y_width; |
---|
| 1148 | uint32_t index = vpn & ((x_size * y_size) - 1); |
---|
| 1149 | uint32_t x = index / y_size; |
---|
| 1150 | uint32_t y = index % y_size; |
---|
| 1151 | page_cxy = (x<<y_width) + y; |
---|
| 1152 | } |
---|
| 1153 | else // other cases => cxy specified in vseg |
---|
| 1154 | { |
---|
| 1155 | page_cxy = vseg->cxy; |
---|
| 1156 | } |
---|
| 1157 | |
---|
| 1158 | // allocate a physical page from target cluster |
---|
| 1159 | if( page_cxy == local_cxy ) // target cluster is the local cluster |
---|
| 1160 | { |
---|
| 1161 | req.type = KMEM_PAGE; |
---|
| 1162 | req.size = 0; |
---|
| 1163 | req.flags = AF_NONE; |
---|
| 1164 | page_ptr = (page_t *)kmem_alloc( &req ); |
---|
| 1165 | } |
---|
| 1166 | else // target cluster is not the local cluster |
---|
| 1167 | { |
---|
| 1168 | rpc_pmem_get_pages_client( page_cxy , 0 , &page_ptr ); |
---|
| 1169 | } |
---|
| 1170 | |
---|
| 1171 | if( page_ptr == NULL ) return XPTR_NULL; |
---|
| 1172 | else return XPTR( page_cxy , page_ptr ); |
---|
| 1173 | |
---|
| 1174 | } // end vmm_page_allocate() |
---|
| 1175 | |
---|
[313] | 1176 | //////////////////////////////////////// |
---|
| 1177 | error_t vmm_get_one_ppn( vseg_t * vseg, |
---|
| 1178 | vpn_t vpn, |
---|
| 1179 | ppn_t * ppn ) |
---|
| 1180 | { |
---|
| 1181 | error_t error; |
---|
[407] | 1182 | xptr_t page_xp; // extended pointer on physical page descriptor |
---|
[313] | 1183 | page_t * page_ptr; // local pointer on physical page descriptor |
---|
[406] | 1184 | uint32_t index; // missing page index in vseg mapper |
---|
| 1185 | uint32_t type; // vseg type; |
---|
[313] | 1186 | |
---|
[406] | 1187 | type = vseg->type; |
---|
| 1188 | index = vpn - vseg->vpn_base; |
---|
[313] | 1189 | |
---|
[407] | 1190 | vmm_dmsg("\n[DBG] %s : core[%x,%d] enter for vpn = %x / type = %s / index = %d\n", |
---|
| 1191 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, vpn, vseg_type_str(type), index ); |
---|
[313] | 1192 | |
---|
[406] | 1193 | // FILE type : get the physical page from the file mapper |
---|
[313] | 1194 | if( type == VSEG_TYPE_FILE ) |
---|
| 1195 | { |
---|
[406] | 1196 | // get extended pointer on mapper |
---|
[407] | 1197 | xptr_t mapper_xp = vseg->mapper_xp; |
---|
[313] | 1198 | |
---|
[406] | 1199 | assert( (mapper_xp != XPTR_NULL), __FUNCTION__, |
---|
| 1200 | "mapper not defined for a FILE vseg\n" ); |
---|
| 1201 | |
---|
| 1202 | // get mapper cluster and local pointer |
---|
| 1203 | cxy_t mapper_cxy = GET_CXY( mapper_xp ); |
---|
| 1204 | mapper_t * mapper_ptr = (mapper_t *)GET_PTR( mapper_xp ); |
---|
| 1205 | |
---|
[313] | 1206 | // get page descriptor from mapper |
---|
| 1207 | if( mapper_cxy == local_cxy ) // mapper is local |
---|
| 1208 | { |
---|
| 1209 | page_ptr = mapper_get_page( mapper_ptr , index ); |
---|
| 1210 | } |
---|
| 1211 | else // mapper is remote |
---|
| 1212 | { |
---|
| 1213 | rpc_mapper_get_page_client( mapper_cxy , mapper_ptr , index , &page_ptr ); |
---|
| 1214 | } |
---|
| 1215 | |
---|
| 1216 | if ( page_ptr == NULL ) return EINVAL; |
---|
| 1217 | |
---|
[407] | 1218 | page_xp = XPTR( mapper_cxy , page_ptr ); |
---|
[313] | 1219 | } |
---|
| 1220 | |
---|
[406] | 1221 | // Other types : allocate a physical page from target cluster, |
---|
[407] | 1222 | // as defined by vseg type and vpn value |
---|
[313] | 1223 | else |
---|
| 1224 | { |
---|
[407] | 1225 | // allocate physical page |
---|
| 1226 | page_xp = vmm_page_allocate( vseg , vpn ); |
---|
[406] | 1227 | |
---|
[407] | 1228 | if( page_xp == XPTR_NULL ) return ENOMEM; |
---|
[313] | 1229 | |
---|
[406] | 1230 | // initialise missing page from .elf file mapper for DATA and CODE types |
---|
| 1231 | // => the mapper_xp field is an extended pointer on the .elf file mapper |
---|
[313] | 1232 | if( (type == VSEG_TYPE_CODE) || (type == VSEG_TYPE_DATA) ) |
---|
| 1233 | { |
---|
[406] | 1234 | // get extended pointer on mapper |
---|
| 1235 | xptr_t mapper_xp = vseg->mapper_xp; |
---|
[313] | 1236 | |
---|
[406] | 1237 | assert( (mapper_xp != XPTR_NULL), __FUNCTION__, |
---|
| 1238 | "mapper not defined for a CODE or DATA vseg\n" ); |
---|
| 1239 | |
---|
| 1240 | // get mapper cluster and local pointer |
---|
| 1241 | cxy_t mapper_cxy = GET_CXY( mapper_xp ); |
---|
| 1242 | mapper_t * mapper_ptr = (mapper_t *)GET_PTR( mapper_xp ); |
---|
| 1243 | |
---|
| 1244 | // compute missing page offset in vseg |
---|
| 1245 | uint32_t offset = index << CONFIG_PPM_PAGE_SHIFT; |
---|
| 1246 | |
---|
[313] | 1247 | // compute missing page offset in .elf file |
---|
[406] | 1248 | uint32_t elf_offset = vseg->file_offset + offset; |
---|
[313] | 1249 | |
---|
[407] | 1250 | vmm_dmsg("\n[DBG] %s : core[%x,%d] for vpn = %x / elf_offset = %x\n", |
---|
| 1251 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, vpn, elf_offset ); |
---|
[313] | 1252 | |
---|
[406] | 1253 | // compute extended pointer on page base |
---|
[407] | 1254 | xptr_t base_xp = ppm_page2base( page_xp ); |
---|
[313] | 1255 | |
---|
[406] | 1256 | // file_size (in .elf mapper) can be smaller than vseg_size (BSS) |
---|
| 1257 | uint32_t file_size = vseg->file_size; |
---|
| 1258 | |
---|
| 1259 | if( file_size < offset ) // missing page fully in BSS |
---|
[313] | 1260 | { |
---|
[407] | 1261 | vmm_dmsg("\n[DBG] %s : core[%x,%d] for vpn = %x / fully in BSS\n", |
---|
| 1262 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, vpn ); |
---|
[406] | 1263 | |
---|
[407] | 1264 | if( GET_CXY( page_xp ) == local_cxy ) |
---|
[313] | 1265 | { |
---|
[315] | 1266 | memset( GET_PTR( base_xp ) , 0 , CONFIG_PPM_PAGE_SIZE ); |
---|
[313] | 1267 | } |
---|
| 1268 | else |
---|
| 1269 | { |
---|
[315] | 1270 | hal_remote_memset( base_xp , 0 , CONFIG_PPM_PAGE_SIZE ); |
---|
[313] | 1271 | } |
---|
| 1272 | } |
---|
[406] | 1273 | else if( file_size >= (offset + CONFIG_PPM_PAGE_SIZE) ) // fully in mapper |
---|
[315] | 1274 | { |
---|
[406] | 1275 | |
---|
[407] | 1276 | vmm_dmsg("\n[DBG] %s : core[%x,%d] for vpn = %x / fully in mapper\n", |
---|
| 1277 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, vpn ); |
---|
| 1278 | |
---|
[313] | 1279 | if( mapper_cxy == local_cxy ) |
---|
| 1280 | { |
---|
| 1281 | error = mapper_move_kernel( mapper_ptr, |
---|
| 1282 | true, // to_buffer |
---|
[406] | 1283 | elf_offset, |
---|
[313] | 1284 | base_xp, |
---|
[315] | 1285 | CONFIG_PPM_PAGE_SIZE ); |
---|
[313] | 1286 | } |
---|
| 1287 | else |
---|
| 1288 | { |
---|
| 1289 | rpc_mapper_move_buffer_client( mapper_cxy, |
---|
| 1290 | mapper_ptr, |
---|
| 1291 | true, // to buffer |
---|
| 1292 | false, // kernel buffer |
---|
[406] | 1293 | elf_offset, |
---|
| 1294 | base_xp, |
---|
[315] | 1295 | CONFIG_PPM_PAGE_SIZE, |
---|
[313] | 1296 | &error ); |
---|
| 1297 | } |
---|
| 1298 | if( error ) return EINVAL; |
---|
| 1299 | } |
---|
[406] | 1300 | else // both in mapper and in BSS : |
---|
| 1301 | // - (file_size - offset) bytes from mapper |
---|
| 1302 | // - (page_size + offset - file_size) bytes from BSS |
---|
[313] | 1303 | { |
---|
[406] | 1304 | |
---|
[407] | 1305 | vmm_dmsg("\n[DBG] %s : core[%x,%d] for vpn = %x / both mapper & BSS\n" |
---|
| 1306 | " %d bytes from mapper / %d bytes from BSS\n", |
---|
| 1307 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, vpn, |
---|
| 1308 | file_size - offset , offset + CONFIG_PPM_PAGE_SIZE - file_size ); |
---|
| 1309 | |
---|
[313] | 1310 | // initialize mapper part |
---|
[315] | 1311 | if( mapper_cxy == local_cxy ) |
---|
[313] | 1312 | { |
---|
| 1313 | error = mapper_move_kernel( mapper_ptr, |
---|
[315] | 1314 | true, // to buffer |
---|
[406] | 1315 | elf_offset, |
---|
[313] | 1316 | base_xp, |
---|
[406] | 1317 | file_size - offset ); |
---|
[313] | 1318 | } |
---|
[315] | 1319 | else |
---|
[313] | 1320 | { |
---|
| 1321 | rpc_mapper_move_buffer_client( mapper_cxy, |
---|
| 1322 | mapper_ptr, |
---|
[315] | 1323 | true, // to buffer |
---|
[313] | 1324 | false, // kernel buffer |
---|
[406] | 1325 | elf_offset, |
---|
| 1326 | base_xp, |
---|
| 1327 | file_size - offset, |
---|
[313] | 1328 | &error ); |
---|
| 1329 | } |
---|
| 1330 | if( error ) return EINVAL; |
---|
| 1331 | |
---|
| 1332 | // initialize BSS part |
---|
[407] | 1333 | if( GET_CXY( page_xp ) == local_cxy ) |
---|
[313] | 1334 | { |
---|
[406] | 1335 | memset( GET_PTR( base_xp ) + file_size - offset , 0 , |
---|
| 1336 | offset + CONFIG_PPM_PAGE_SIZE - file_size ); |
---|
[313] | 1337 | } |
---|
| 1338 | else |
---|
| 1339 | { |
---|
[406] | 1340 | hal_remote_memset( base_xp + file_size - offset , 0 , |
---|
| 1341 | offset + CONFIG_PPM_PAGE_SIZE - file_size ); |
---|
[313] | 1342 | } |
---|
| 1343 | } |
---|
| 1344 | } // end initialisation for CODE or DATA types |
---|
| 1345 | } |
---|
| 1346 | |
---|
| 1347 | // return ppn |
---|
[407] | 1348 | *ppn = ppm_page2ppn( page_xp ); |
---|
[406] | 1349 | |
---|
[407] | 1350 | vmm_dmsg("\n[DBG] %s : core[%x,%d] exit for vpn = %x / ppn = %x\n", |
---|
| 1351 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , vpn , *ppn ); |
---|
[406] | 1352 | |
---|
[313] | 1353 | return 0; |
---|
| 1354 | |
---|
| 1355 | } // end vmm_get_one_ppn() |
---|
| 1356 | |
---|
[1] | 1357 | ///////////////////////////////////////// |
---|
| 1358 | error_t vmm_get_pte( process_t * process, |
---|
| 1359 | vpn_t vpn, |
---|
[407] | 1360 | bool_t cow, |
---|
| 1361 | uint32_t * attr, |
---|
| 1362 | ppn_t * ppn ) |
---|
[1] | 1363 | { |
---|
[407] | 1364 | vseg_t * vseg; // pointer on vseg containing VPN |
---|
| 1365 | ppn_t old_ppn; // current PTE_PPN |
---|
| 1366 | uint32_t old_attr; // current PTE_ATTR |
---|
| 1367 | ppn_t new_ppn; // new PTE_PPN |
---|
| 1368 | uint32_t new_attr; // new PTE_ATTR |
---|
[1] | 1369 | error_t error; |
---|
| 1370 | |
---|
[178] | 1371 | // this function must be called by a thread running in the reference cluster |
---|
[68] | 1372 | assert( (GET_CXY( process->ref_xp ) == local_cxy ) , __FUNCTION__ , |
---|
[406] | 1373 | "not called in the reference cluster\n" ); |
---|
[1] | 1374 | |
---|
[407] | 1375 | vmm_dmsg("\n[DBG] %s : core[%x,%d] enter for vpn = %x in process %x / cow = %d\n", |
---|
[408] | 1376 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , vpn , process->pid , cow ); |
---|
[406] | 1377 | |
---|
[1] | 1378 | // get VMM pointer |
---|
| 1379 | vmm_t * vmm = &process->vmm; |
---|
| 1380 | |
---|
[407] | 1381 | // get vseg pointer from ref VSL |
---|
| 1382 | error = vmm_get_vseg( process , vpn<<CONFIG_PPM_PAGE_SHIFT , &vseg ); |
---|
[1] | 1383 | |
---|
[407] | 1384 | if( error ) |
---|
[1] | 1385 | { |
---|
[407] | 1386 | printk("\n[ERROR] in %s : out of segment / process = %x / vpn = %x\n", |
---|
| 1387 | __FUNCTION__ , process->pid , vpn ); |
---|
| 1388 | return error; |
---|
| 1389 | } |
---|
[406] | 1390 | |
---|
[407] | 1391 | vmm_dmsg("\n[DBG] %s : core[%x,%d] found vseg %s / vpn_base = %x / vpn_size = %x\n", |
---|
| 1392 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , |
---|
| 1393 | vseg_type_str(vseg->type) , vseg->vpn_base , vseg->vpn_size ); |
---|
[1] | 1394 | |
---|
[407] | 1395 | // access GPT to get current PTE attributes and PPN |
---|
| 1396 | hal_gpt_get_pte( &vmm->gpt , vpn , &old_attr , &old_ppn ); |
---|
| 1397 | |
---|
[408] | 1398 | // for both "copy_on_write" and "page_fault" events, allocate a physical page, |
---|
| 1399 | // initialize it, register it in the reference GPT, update GPT copies in all |
---|
| 1400 | // clusters containing a copy, and return the new_ppn and new_attr |
---|
[407] | 1401 | |
---|
| 1402 | if( cow ) ////////////// copy_on_write request /////////// |
---|
| 1403 | { |
---|
[408] | 1404 | assert( (old_attr & GPT_MAPPED) , __FUNCTION__ , |
---|
| 1405 | "PTE must be mapped for a copy-on-write exception\n" ); |
---|
[407] | 1406 | |
---|
[408] | 1407 | excp_dmsg("\n[DBG] %s : core[%x,%d] handling COW for vpn %x\n", |
---|
[407] | 1408 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , vpn ); |
---|
| 1409 | |
---|
[408] | 1410 | // get extended pointer, cluster and local pointer on page descriptor |
---|
| 1411 | xptr_t page_xp = ppm_ppn2page( old_ppn ); |
---|
| 1412 | cxy_t page_cxy = GET_CXY( page_xp ); |
---|
| 1413 | page_t * page_ptr = (page_t *)GET_PTR( page_xp ); |
---|
[407] | 1414 | |
---|
[408] | 1415 | // get number of pending forks in page descriptor |
---|
| 1416 | uint32_t count = hal_remote_lw( XPTR( page_cxy , &page_ptr->fork_nr ) ); |
---|
| 1417 | |
---|
| 1418 | if( count ) // pending fork => allocate a new page, copy it, reset COW |
---|
[1] | 1419 | { |
---|
[408] | 1420 | // allocate a new physical page |
---|
| 1421 | page_xp = vmm_page_allocate( vseg , vpn ); |
---|
| 1422 | if( page_xp == XPTR_NULL ) |
---|
| 1423 | { |
---|
| 1424 | printk("\n[ERROR] in %s : no memory / process = %x / vpn = %x\n", |
---|
| 1425 | __FUNCTION__ , process->pid , vpn ); |
---|
| 1426 | return -1; |
---|
| 1427 | } |
---|
[1] | 1428 | |
---|
[408] | 1429 | // compute allocated page PPN |
---|
| 1430 | new_ppn = ppm_page2ppn( page_xp ); |
---|
[406] | 1431 | |
---|
[408] | 1432 | // copy old page content to new page |
---|
| 1433 | xptr_t old_base_xp = ppm_ppn2base( old_ppn ); |
---|
| 1434 | xptr_t new_base_xp = ppm_ppn2base( new_ppn ); |
---|
| 1435 | memcpy( GET_PTR( new_base_xp ), |
---|
| 1436 | GET_PTR( old_base_xp ), |
---|
| 1437 | CONFIG_PPM_PAGE_SIZE ); |
---|
| 1438 | } |
---|
| 1439 | else // no pending fork => keep the existing page, reset COW |
---|
| 1440 | { |
---|
| 1441 | new_ppn = old_ppn; |
---|
| 1442 | } |
---|
[1] | 1443 | |
---|
[408] | 1444 | // build new_attr : reset COW and set WRITABLE, |
---|
| 1445 | new_attr = (old_attr | GPT_WRITABLE) & (~GPT_COW); |
---|
[407] | 1446 | |
---|
[408] | 1447 | // update GPT[vpn] for all GPT copies |
---|
| 1448 | // to maintain coherence of copies |
---|
| 1449 | vmm_update_pte( process, |
---|
| 1450 | vpn, |
---|
| 1451 | new_attr, |
---|
| 1452 | new_ppn ); |
---|
[407] | 1453 | |
---|
[408] | 1454 | // decrement fork_nr in page descriptor |
---|
| 1455 | hal_remote_atomic_add( XPTR( page_cxy , &page_ptr->fork_nr ) , -1 ); |
---|
[407] | 1456 | } |
---|
[408] | 1457 | else /////////////// page_fault request /////////// |
---|
[407] | 1458 | { |
---|
[408] | 1459 | if( (old_attr & GPT_MAPPED) == 0 ) // true page_fault => map it |
---|
[407] | 1460 | { |
---|
[1] | 1461 | |
---|
[408] | 1462 | excp_dmsg("\n[DBG] %s : core[%x,%d] handling page fault for vpn %x\n", |
---|
[407] | 1463 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , vpn ); |
---|
[1] | 1464 | |
---|
[408] | 1465 | // allocate new_ppn, depending on vseg type |
---|
[407] | 1466 | error = vmm_get_one_ppn( vseg , vpn , &new_ppn ); |
---|
| 1467 | if( error ) |
---|
| 1468 | { |
---|
| 1469 | printk("\n[ERROR] in %s : no memory / process = %x / vpn = %x\n", |
---|
| 1470 | __FUNCTION__ , process->pid , vpn ); |
---|
[408] | 1471 | return -1; |
---|
[407] | 1472 | } |
---|
| 1473 | |
---|
[408] | 1474 | // define new_attr from vseg flags |
---|
[407] | 1475 | new_attr = GPT_MAPPED | GPT_SMALL; |
---|
| 1476 | if( vseg->flags & VSEG_USER ) new_attr |= GPT_USER; |
---|
| 1477 | if( vseg->flags & VSEG_WRITE ) new_attr |= GPT_WRITABLE; |
---|
| 1478 | if( vseg->flags & VSEG_EXEC ) new_attr |= GPT_EXECUTABLE; |
---|
| 1479 | if( vseg->flags & VSEG_CACHE ) new_attr |= GPT_CACHABLE; |
---|
| 1480 | |
---|
[408] | 1481 | // register new PTE in reference GPT |
---|
| 1482 | // on demand policy => no update of GPT copies |
---|
| 1483 | error = hal_gpt_set_pte( &vmm->gpt, |
---|
| 1484 | vpn, |
---|
| 1485 | new_attr, |
---|
| 1486 | new_ppn ); |
---|
[407] | 1487 | if( error ) |
---|
| 1488 | { |
---|
| 1489 | printk("\n[ERROR] in %s : cannot update GPT / process = %x / vpn = %x\n", |
---|
| 1490 | __FUNCTION__ , process->pid , vpn ); |
---|
[408] | 1491 | return -1; |
---|
[407] | 1492 | } |
---|
| 1493 | } |
---|
[408] | 1494 | else // mapped in reference GPT => get it |
---|
[1] | 1495 | { |
---|
[408] | 1496 | new_ppn = old_ppn; |
---|
[407] | 1497 | new_attr = old_attr; |
---|
[1] | 1498 | } |
---|
[407] | 1499 | } |
---|
[1] | 1500 | |
---|
[408] | 1501 | excp_dmsg("\n[DBG] %s : core[%x,%d] update GPT for vpn %x / ppn = %x / attr = %x\n", |
---|
[407] | 1502 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , vpn , new_ppn , new_attr ); |
---|
[406] | 1503 | |
---|
[408] | 1504 | // retur success |
---|
[407] | 1505 | *ppn = new_ppn; |
---|
| 1506 | *attr = new_attr; |
---|
[1] | 1507 | return 0; |
---|
| 1508 | |
---|
[313] | 1509 | } // end vmm_get_pte() |
---|
| 1510 | |
---|
[1] | 1511 | /////////////////////////////////////////////////// |
---|
| 1512 | error_t vmm_handle_page_fault( process_t * process, |
---|
| 1513 | vpn_t vpn ) |
---|
| 1514 | { |
---|
| 1515 | uint32_t attr; // missing page attributes |
---|
[21] | 1516 | ppn_t ppn; // missing page PPN |
---|
[407] | 1517 | error_t error; |
---|
[1] | 1518 | |
---|
| 1519 | // get reference process cluster and local pointer |
---|
| 1520 | cxy_t ref_cxy = GET_CXY( process->ref_xp ); |
---|
| 1521 | process_t * ref_ptr = (process_t *)GET_PTR( process->ref_xp ); |
---|
| 1522 | |
---|
[313] | 1523 | // get missing PTE attributes and PPN from reference cluster |
---|
[407] | 1524 | if( local_cxy != ref_cxy ) |
---|
[1] | 1525 | { |
---|
[407] | 1526 | rpc_vmm_get_pte_client( ref_cxy, |
---|
| 1527 | ref_ptr, |
---|
| 1528 | vpn, |
---|
| 1529 | false, // page_fault |
---|
| 1530 | &attr, |
---|
| 1531 | &ppn, |
---|
| 1532 | &error ); |
---|
| 1533 | |
---|
| 1534 | // get local VMM pointer |
---|
| 1535 | vmm_t * vmm = &process->vmm; |
---|
| 1536 | |
---|
| 1537 | // update local GPT |
---|
[408] | 1538 | error |= hal_gpt_set_pte( &vmm->gpt, |
---|
| 1539 | vpn, |
---|
| 1540 | attr, |
---|
| 1541 | ppn ); |
---|
[1] | 1542 | } |
---|
[407] | 1543 | else // local cluster is the reference cluster |
---|
[1] | 1544 | { |
---|
[407] | 1545 | error = vmm_get_pte( process, |
---|
| 1546 | vpn, |
---|
| 1547 | false, // page-fault |
---|
| 1548 | &attr, |
---|
| 1549 | &ppn ); |
---|
[1] | 1550 | } |
---|
| 1551 | |
---|
[388] | 1552 | return error; |
---|
[1] | 1553 | |
---|
[313] | 1554 | } // end vmm_handle_page_fault() |
---|
| 1555 | |
---|
[408] | 1556 | //////////////////////////////////////////// |
---|
| 1557 | error_t vmm_handle_cow( process_t * process, |
---|
| 1558 | vpn_t vpn ) |
---|
[407] | 1559 | { |
---|
| 1560 | uint32_t attr; // missing page attributes |
---|
| 1561 | ppn_t ppn; // missing page PPN |
---|
| 1562 | error_t error; |
---|
[313] | 1563 | |
---|
[407] | 1564 | // get reference process cluster and local pointer |
---|
| 1565 | cxy_t ref_cxy = GET_CXY( process->ref_xp ); |
---|
| 1566 | process_t * ref_ptr = (process_t *)GET_PTR( process->ref_xp ); |
---|
| 1567 | |
---|
| 1568 | // get new PTE attributes and PPN from reference cluster |
---|
| 1569 | if( local_cxy != ref_cxy ) |
---|
| 1570 | { |
---|
| 1571 | rpc_vmm_get_pte_client( ref_cxy, |
---|
| 1572 | ref_ptr, |
---|
| 1573 | vpn, |
---|
| 1574 | true, // copy-on-write |
---|
| 1575 | &attr, |
---|
| 1576 | &ppn, |
---|
| 1577 | &error ); |
---|
| 1578 | |
---|
| 1579 | // get local VMM pointer |
---|
| 1580 | vmm_t * vmm = &process->vmm; |
---|
| 1581 | |
---|
| 1582 | // update local GPT |
---|
[408] | 1583 | error |= hal_gpt_set_pte( &vmm->gpt, |
---|
| 1584 | vpn, |
---|
| 1585 | attr, |
---|
| 1586 | ppn ); |
---|
[407] | 1587 | } |
---|
| 1588 | else // local cluster is the reference cluster |
---|
| 1589 | { |
---|
| 1590 | error = vmm_get_pte( process, |
---|
| 1591 | vpn, |
---|
| 1592 | true, // copy-on-write |
---|
| 1593 | &attr, |
---|
| 1594 | &ppn ); |
---|
| 1595 | } |
---|
| 1596 | |
---|
| 1597 | return error; |
---|
| 1598 | |
---|
[408] | 1599 | } // end vmm_handle_cow() |
---|
[407] | 1600 | |
---|
[1] | 1601 | /////////////////////////////////////////// |
---|
| 1602 | error_t vmm_v2p_translate( bool_t ident, |
---|
| 1603 | void * ptr, |
---|
| 1604 | paddr_t * paddr ) |
---|
| 1605 | { |
---|
[23] | 1606 | process_t * process = CURRENT_THREAD->process; |
---|
[1] | 1607 | |
---|
| 1608 | if( ident ) // identity mapping |
---|
| 1609 | { |
---|
[23] | 1610 | *paddr = (paddr_t)PADDR( local_cxy , (lpa_t)ptr ); |
---|
[1] | 1611 | return 0; |
---|
| 1612 | } |
---|
| 1613 | |
---|
[21] | 1614 | // access page table |
---|
[1] | 1615 | error_t error; |
---|
| 1616 | vpn_t vpn; |
---|
| 1617 | uint32_t attr; |
---|
| 1618 | ppn_t ppn; |
---|
| 1619 | uint32_t offset; |
---|
| 1620 | |
---|
[23] | 1621 | vpn = (vpn_t)( (intptr_t)ptr >> CONFIG_PPM_PAGE_SHIFT ); |
---|
| 1622 | offset = (uint32_t)( ((intptr_t)ptr) & CONFIG_PPM_PAGE_MASK ); |
---|
[1] | 1623 | |
---|
[50] | 1624 | if( local_cxy == GET_CXY( process->ref_xp) ) // calling process is reference process |
---|
[1] | 1625 | { |
---|
[407] | 1626 | error = vmm_get_pte( process, vpn , false , &attr , &ppn ); |
---|
[1] | 1627 | } |
---|
[50] | 1628 | else // calling process is not reference process |
---|
[1] | 1629 | { |
---|
| 1630 | cxy_t ref_cxy = GET_CXY( process->ref_xp ); |
---|
| 1631 | process_t * ref_ptr = (process_t *)GET_PTR( process->ref_xp ); |
---|
[407] | 1632 | rpc_vmm_get_pte_client( ref_cxy , ref_ptr , vpn , false , &attr , &ppn , &error ); |
---|
[1] | 1633 | } |
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| 1634 | |
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[23] | 1635 | // set paddr |
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[1] | 1636 | *paddr = (((paddr_t)ppn) << CONFIG_PPM_PAGE_SHIFT) | offset; |
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[21] | 1637 | |
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[23] | 1638 | return error; |
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[313] | 1639 | |
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[315] | 1640 | } // end vmm_v2p_translate() |
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[1] | 1641 | |
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[315] | 1642 | |
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