[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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[409] | 30 | #include <hal_vmm.h> |
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[1] | 31 | #include <printk.h> |
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[23] | 32 | #include <memcpy.h> |
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[1] | 33 | #include <rwlock.h> |
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| 34 | #include <list.h> |
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[408] | 35 | #include <xlist.h> |
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[1] | 36 | #include <bits.h> |
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| 37 | #include <process.h> |
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| 38 | #include <thread.h> |
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| 39 | #include <vseg.h> |
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| 40 | #include <cluster.h> |
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| 41 | #include <scheduler.h> |
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| 42 | #include <vfs.h> |
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| 43 | #include <mapper.h> |
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| 44 | #include <page.h> |
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| 45 | #include <kmem.h> |
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| 46 | #include <vmm.h> |
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| 47 | |
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| 48 | ////////////////////////////////////////////////////////////////////////////////// |
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| 49 | // Extern global variables |
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| 50 | ////////////////////////////////////////////////////////////////////////////////// |
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| 51 | |
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| 52 | extern process_t process_zero; // defined in cluster.c file |
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| 53 | |
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| 54 | |
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[415] | 55 | /////////////////////////////////////// |
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| 56 | error_t vmm_init( process_t * process ) |
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[21] | 57 | { |
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[1] | 58 | error_t error; |
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| 59 | vseg_t * vseg_kentry; |
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| 60 | vseg_t * vseg_args; |
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| 61 | vseg_t * vseg_envs; |
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| 62 | intptr_t base; |
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| 63 | intptr_t size; |
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| 64 | |
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[438] | 65 | #if DEBUG_VMM_INIT |
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[433] | 66 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[438] | 67 | if( DEBUG_VMM_INIT ) |
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[433] | 68 | printk("\n[DBG] %s : thread %x enter for process %x / cycle %d\n", |
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| 69 | __FUNCTION__ , CURRENT_THREAD , process->pid , cycle ); |
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| 70 | #endif |
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[204] | 71 | |
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[1] | 72 | // get pointer on VMM |
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| 73 | vmm_t * vmm = &process->vmm; |
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| 74 | |
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[407] | 75 | // initialize local list of vsegs |
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| 76 | vmm->vsegs_nr = 0; |
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[408] | 77 | xlist_root_init( XPTR( local_cxy , &vmm->vsegs_root ) ); |
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| 78 | remote_rwlock_init( XPTR( local_cxy , &vmm->vsegs_lock ) ); |
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[407] | 79 | |
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[204] | 80 | assert( ((CONFIG_VMM_KENTRY_SIZE + CONFIG_VMM_ARGS_SIZE + CONFIG_VMM_ENVS_SIZE) |
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| 81 | <= CONFIG_VMM_ELF_BASE) , __FUNCTION__ , "UTILS zone too small\n" ); |
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[21] | 82 | |
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[204] | 83 | assert( (CONFIG_THREAD_MAX_PER_CLUSTER <= 32) , __FUNCTION__ , |
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| 84 | "no more than 32 threads per cluster for a single process\n"); |
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[1] | 85 | |
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[204] | 86 | assert( ((CONFIG_VMM_STACK_SIZE * CONFIG_THREAD_MAX_PER_CLUSTER) <= |
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| 87 | (CONFIG_VMM_VSPACE_SIZE - CONFIG_VMM_STACK_BASE)) , __FUNCTION__ , |
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| 88 | "STACK zone too small\n"); |
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[1] | 89 | |
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[409] | 90 | // register kentry vseg in VSL |
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[406] | 91 | base = CONFIG_VMM_KENTRY_BASE << CONFIG_PPM_PAGE_SHIFT; |
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[1] | 92 | size = CONFIG_VMM_KENTRY_SIZE << CONFIG_PPM_PAGE_SHIFT; |
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[406] | 93 | |
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[407] | 94 | vseg_kentry = vmm_create_vseg( process, |
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| 95 | VSEG_TYPE_CODE, |
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| 96 | base, |
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| 97 | size, |
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| 98 | 0, // file_offset unused |
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| 99 | 0, // file_size unused |
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| 100 | XPTR_NULL, // mapper_xp unused |
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| 101 | local_cxy ); |
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[204] | 102 | |
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[415] | 103 | if( vseg_kentry == NULL ) |
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| 104 | { |
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| 105 | printk("\n[ERROR] in %s : cannot register kentry vseg\n", __FUNCTION__ ); |
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| 106 | return -1; |
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| 107 | } |
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[204] | 108 | |
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[406] | 109 | vmm->kent_vpn_base = base; |
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[1] | 110 | |
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[409] | 111 | // register args vseg in VSL |
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[406] | 112 | base = (CONFIG_VMM_KENTRY_BASE + |
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| 113 | CONFIG_VMM_KENTRY_SIZE ) << CONFIG_PPM_PAGE_SHIFT; |
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[1] | 114 | size = CONFIG_VMM_ARGS_SIZE << CONFIG_PPM_PAGE_SHIFT; |
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[406] | 115 | |
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[407] | 116 | vseg_args = vmm_create_vseg( process, |
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| 117 | VSEG_TYPE_DATA, |
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| 118 | base, |
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| 119 | size, |
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| 120 | 0, // file_offset unused |
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| 121 | 0, // file_size unused |
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| 122 | XPTR_NULL, // mapper_xp unused |
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| 123 | local_cxy ); |
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[204] | 124 | |
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[415] | 125 | if( vseg_args == NULL ) |
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| 126 | { |
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| 127 | printk("\n[ERROR] in %s : cannot register args vseg\n", __FUNCTION__ ); |
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| 128 | return -1; |
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| 129 | } |
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[204] | 130 | |
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[406] | 131 | vmm->args_vpn_base = base; |
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[1] | 132 | |
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[409] | 133 | // register the envs vseg in VSL |
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[406] | 134 | base = (CONFIG_VMM_KENTRY_BASE + |
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| 135 | CONFIG_VMM_KENTRY_SIZE + |
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| 136 | CONFIG_VMM_ARGS_SIZE ) << CONFIG_PPM_PAGE_SHIFT; |
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[1] | 137 | size = CONFIG_VMM_ENVS_SIZE << CONFIG_PPM_PAGE_SHIFT; |
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[406] | 138 | |
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[407] | 139 | vseg_envs = vmm_create_vseg( process, |
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| 140 | VSEG_TYPE_DATA, |
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| 141 | base, |
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| 142 | size, |
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| 143 | 0, // file_offset unused |
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| 144 | 0, // file_size unused |
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| 145 | XPTR_NULL, // mapper_xp unused |
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| 146 | local_cxy ); |
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[204] | 147 | |
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[415] | 148 | if( vseg_envs == NULL ) |
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| 149 | { |
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| 150 | printk("\n[ERROR] in %s : cannot register envs vseg\n", __FUNCTION__ ); |
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| 151 | return -1; |
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| 152 | } |
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[204] | 153 | |
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[406] | 154 | vmm->envs_vpn_base = base; |
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[1] | 155 | |
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[409] | 156 | // create GPT (empty) |
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[1] | 157 | error = hal_gpt_create( &vmm->gpt ); |
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| 158 | |
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[415] | 159 | if( error ) |
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| 160 | printk("\n[ERROR] in %s : cannot create GPT\n", __FUNCTION__ ); |
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[204] | 161 | |
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[415] | 162 | // initialize GPT (architecture specic) |
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[409] | 163 | // (For TSAR, identity map the kentry_vseg) |
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| 164 | error = hal_vmm_init( vmm ); |
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| 165 | |
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[415] | 166 | if( error ) |
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| 167 | printk("\n[ERROR] in %s : cannot initialize GPT\n", __FUNCTION__ ); |
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[409] | 168 | |
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[1] | 169 | // initialize STACK allocator |
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| 170 | vmm->stack_mgr.bitmap = 0; |
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| 171 | vmm->stack_mgr.vpn_base = CONFIG_VMM_STACK_BASE; |
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| 172 | |
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| 173 | // initialize MMAP allocator |
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[407] | 174 | vmm->mmap_mgr.vpn_base = CONFIG_VMM_HEAP_BASE; |
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| 175 | vmm->mmap_mgr.vpn_size = CONFIG_VMM_STACK_BASE - CONFIG_VMM_HEAP_BASE; |
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| 176 | vmm->mmap_mgr.first_free_vpn = CONFIG_VMM_HEAP_BASE; |
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[1] | 177 | uint32_t i; |
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| 178 | for( i = 0 ; i < 32 ; i++ ) list_root_init( &vmm->mmap_mgr.zombi_list[i] ); |
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| 179 | |
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[21] | 180 | // initialize instrumentation counters |
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[409] | 181 | vmm->pgfault_nr = 0; |
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[1] | 182 | |
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[124] | 183 | hal_fence(); |
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[1] | 184 | |
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[438] | 185 | #if DEBUG_VMM_INIT |
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[433] | 186 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 187 | if( DEBUG_VMM_INIT ) |
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[433] | 188 | printk("\n[DBG] %s : thread %x exit for process %x / entry_point = %x / cycle %d\n", |
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| 189 | __FUNCTION__ , CURRENT_THREAD , process->pid , process->vmm.entry_point , cycle ); |
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| 190 | #endif |
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[204] | 191 | |
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[415] | 192 | return 0; |
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| 193 | |
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[204] | 194 | } // end vmm_init() |
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| 195 | |
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[407] | 196 | ////////////////////////////////////// |
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| 197 | void vmm_display( process_t * process, |
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| 198 | bool_t mapping ) |
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| 199 | { |
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| 200 | vmm_t * vmm = &process->vmm; |
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| 201 | gpt_t * gpt = &vmm->gpt; |
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| 202 | |
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[443] | 203 | printk("\n***** VSL and GPT for process %x in cluster %x\n\n", process->pid , local_cxy ); |
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[407] | 204 | |
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| 205 | // get lock protecting the vseg list |
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[408] | 206 | remote_rwlock_rd_lock( XPTR( local_cxy , &vmm->vsegs_lock ) ); |
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[407] | 207 | |
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| 208 | // scan the list of vsegs |
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[408] | 209 | xptr_t root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
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| 210 | xptr_t iter_xp; |
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| 211 | xptr_t vseg_xp; |
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[407] | 212 | vseg_t * vseg; |
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[408] | 213 | XLIST_FOREACH( root_xp , iter_xp ) |
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[407] | 214 | { |
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[408] | 215 | vseg_xp = XLIST_ELEMENT( iter_xp , vseg_t , xlist ); |
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[433] | 216 | vseg = GET_PTR( vseg_xp ); |
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[408] | 217 | |
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[407] | 218 | printk(" - %s : base = %X / size = %X / npages = %d\n", |
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| 219 | vseg_type_str( vseg->type ) , vseg->min , vseg->max - vseg->min , vseg->vpn_size ); |
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| 220 | |
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| 221 | if( mapping ) |
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| 222 | { |
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| 223 | vpn_t vpn; |
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| 224 | ppn_t ppn; |
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| 225 | uint32_t attr; |
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| 226 | vpn_t base = vseg->vpn_base; |
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| 227 | vpn_t size = vseg->vpn_size; |
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| 228 | for( vpn = base ; vpn < (base+size) ; vpn++ ) |
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| 229 | { |
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| 230 | hal_gpt_get_pte( gpt , vpn , &attr , &ppn ); |
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| 231 | if( attr & GPT_MAPPED ) |
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| 232 | { |
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| 233 | printk(" . vpn = %X / attr = %X / ppn = %X\n", vpn , attr , ppn ); |
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| 234 | } |
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| 235 | } |
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| 236 | } |
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| 237 | } |
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| 238 | |
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| 239 | // release the lock |
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[408] | 240 | remote_rwlock_rd_unlock( XPTR( local_cxy , &vmm->vsegs_lock ) ); |
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[407] | 241 | |
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[408] | 242 | } // vmm_display() |
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| 243 | |
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[433] | 244 | /////////////////////i////////////////////////// |
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| 245 | void vmm_global_update_pte( process_t * process, |
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| 246 | vpn_t vpn, |
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| 247 | uint32_t attr, |
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| 248 | ppn_t ppn ) |
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[23] | 249 | { |
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| 250 | |
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[408] | 251 | xlist_entry_t * process_root_ptr; |
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| 252 | xptr_t process_root_xp; |
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| 253 | xptr_t process_iter_xp; |
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[23] | 254 | |
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[408] | 255 | xptr_t remote_process_xp; |
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| 256 | cxy_t remote_process_cxy; |
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| 257 | process_t * remote_process_ptr; |
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| 258 | xptr_t remote_gpt_xp; |
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[23] | 259 | |
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[408] | 260 | pid_t pid; |
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| 261 | cxy_t owner_cxy; |
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| 262 | lpid_t owner_lpid; |
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[23] | 263 | |
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[438] | 264 | #if DEBUG_VMM_UPDATE_PTE |
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[433] | 265 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[438] | 266 | if( DEBUG_VMM_UPDATE_PTE < cycle ) |
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[433] | 267 | printk("\n[DBG] %s : thread %x enter for process %x / vpn %x / cycle %d\n", |
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| 268 | __FUNCTION__ , CURRENT_THREAD , process->pid , vpn , cycle ); |
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| 269 | #endif |
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| 270 | |
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| 271 | // check cluster is reference |
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| 272 | assert( (GET_CXY( process->ref_xp ) == local_cxy) , __FUNCTION__, |
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| 273 | "not called in reference cluster\n"); |
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| 274 | |
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[408] | 275 | // get extended pointer on root of process copies xlist in owner cluster |
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| 276 | pid = process->pid; |
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| 277 | owner_cxy = CXY_FROM_PID( pid ); |
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| 278 | owner_lpid = LPID_FROM_PID( pid ); |
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| 279 | process_root_ptr = &LOCAL_CLUSTER->pmgr.copies_root[owner_lpid]; |
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| 280 | process_root_xp = XPTR( owner_cxy , process_root_ptr ); |
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[23] | 281 | |
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[408] | 282 | // loop on destination process copies |
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| 283 | XLIST_FOREACH( process_root_xp , process_iter_xp ) |
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| 284 | { |
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| 285 | // get cluster and local pointer on remote process |
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| 286 | remote_process_xp = XLIST_ELEMENT( process_iter_xp , process_t , copies_list ); |
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[433] | 287 | remote_process_ptr = GET_PTR( remote_process_xp ); |
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[408] | 288 | remote_process_cxy = GET_CXY( remote_process_xp ); |
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[407] | 289 | |
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[438] | 290 | #if (DEBUG_VMM_UPDATE_PTE & 0x1) |
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| 291 | if( DEBUG_VMM_UPDATE_PTE < cycle ) |
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[433] | 292 | printk("\n[DBG] %s : thread %x handling process %x in cluster %x\n", |
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| 293 | __FUNCTION__ , CURRENT_THREAD , process->pid , remote_process_cxy ); |
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| 294 | #endif |
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| 295 | |
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[408] | 296 | // get extended pointer on remote gpt |
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| 297 | remote_gpt_xp = XPTR( remote_process_cxy , &remote_process_ptr->vmm.gpt ); |
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| 298 | |
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[433] | 299 | // update remote GPT |
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| 300 | hal_gpt_update_pte( remote_gpt_xp, vpn, attr, ppn ); |
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[408] | 301 | } |
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| 302 | |
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[438] | 303 | #if DEBUG_VMM_UPDATE_PTE |
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[433] | 304 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 305 | if( DEBUG_VMM_UPDATE_PTE < cycle ) |
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[433] | 306 | printk("\n[DBG] %s : thread %x exit for process %x / vpn %x / cycle %d\n", |
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| 307 | __FUNCTION__ , CURRENT_THREAD , process->pid , vpn , cycle ); |
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| 308 | #endif |
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| 309 | |
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| 310 | } // end vmm_global_update_pte() |
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| 311 | |
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[408] | 312 | /////////////////////////////////////// |
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| 313 | void vmm_set_cow( process_t * process ) |
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| 314 | { |
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| 315 | vmm_t * vmm; |
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| 316 | |
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| 317 | xlist_entry_t * process_root_ptr; |
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| 318 | xptr_t process_root_xp; |
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| 319 | xptr_t process_iter_xp; |
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| 320 | |
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| 321 | xptr_t remote_process_xp; |
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| 322 | cxy_t remote_process_cxy; |
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| 323 | process_t * remote_process_ptr; |
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| 324 | xptr_t remote_gpt_xp; |
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| 325 | |
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| 326 | xptr_t vseg_root_xp; |
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| 327 | xptr_t vseg_iter_xp; |
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| 328 | |
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| 329 | xptr_t vseg_xp; |
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| 330 | vseg_t * vseg; |
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| 331 | |
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| 332 | pid_t pid; |
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| 333 | cxy_t owner_cxy; |
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| 334 | lpid_t owner_lpid; |
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| 335 | |
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[438] | 336 | #if DEBUG_VMM_SET_COW |
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[433] | 337 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[438] | 338 | if( DEBUG_VMM_SET_COW < cycle ) |
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[433] | 339 | printk("\n[DBG] %s : thread %x enter for process %x / cycle %d\n", |
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| 340 | __FUNCTION__ , CURRENT_THREAD , process->pid , cycle ); |
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| 341 | #endif |
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[408] | 342 | |
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| 343 | // check cluster is reference |
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| 344 | assert( (GET_CXY( process->ref_xp ) == local_cxy) , __FUNCTION__, |
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| 345 | "local cluster is not process reference cluster\n"); |
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| 346 | |
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| 347 | // get pointer on reference VMM |
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| 348 | vmm = &process->vmm; |
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| 349 | |
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| 350 | // get extended pointer on root of process copies xlist in owner cluster |
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| 351 | pid = process->pid; |
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| 352 | owner_cxy = CXY_FROM_PID( pid ); |
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| 353 | owner_lpid = LPID_FROM_PID( pid ); |
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| 354 | process_root_ptr = &LOCAL_CLUSTER->pmgr.copies_root[owner_lpid]; |
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| 355 | process_root_xp = XPTR( owner_cxy , process_root_ptr ); |
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| 356 | |
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| 357 | // get extended pointer on root of vsegs xlist from reference VMM |
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| 358 | vseg_root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
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| 359 | |
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| 360 | // loop on destination process copies |
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| 361 | XLIST_FOREACH( process_root_xp , process_iter_xp ) |
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| 362 | { |
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| 363 | // get cluster and local pointer on remote process |
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| 364 | remote_process_xp = XLIST_ELEMENT( process_iter_xp , process_t , copies_list ); |
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[433] | 365 | remote_process_ptr = GET_PTR( remote_process_xp ); |
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[408] | 366 | remote_process_cxy = GET_CXY( remote_process_xp ); |
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| 367 | |
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[438] | 368 | #if (DEBUG_VMM_SET_COW &0x1) |
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| 369 | if( DEBUG_VMM_SET_COW < cycle ) |
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[433] | 370 | printk("\n[DBG] %s : thread %x handling process %x in cluster %x\n", |
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| 371 | __FUNCTION__ , CURRENT_THREAD , process->pid , remote_process_cxy ); |
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| 372 | #endif |
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[408] | 373 | |
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| 374 | // get extended pointer on remote gpt |
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| 375 | remote_gpt_xp = XPTR( remote_process_cxy , &remote_process_ptr->vmm.gpt ); |
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| 376 | |
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| 377 | // loop on vsegs in (local) reference process VSL |
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| 378 | XLIST_FOREACH( vseg_root_xp , vseg_iter_xp ) |
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| 379 | { |
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| 380 | // get pointer on vseg |
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| 381 | vseg_xp = XLIST_ELEMENT( vseg_iter_xp , vseg_t , xlist ); |
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[433] | 382 | vseg = GET_PTR( vseg_xp ); |
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[408] | 383 | |
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| 384 | assert( (GET_CXY( vseg_xp ) == local_cxy) , __FUNCTION__, |
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| 385 | "all vsegs in reference VSL must be local\n" ); |
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| 386 | |
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| 387 | // get vseg type, base and size |
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| 388 | uint32_t type = vseg->type; |
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| 389 | vpn_t vpn_base = vseg->vpn_base; |
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| 390 | vpn_t vpn_size = vseg->vpn_size; |
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| 391 | |
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[438] | 392 | #if (DEBUG_VMM_SET_COW & 0x1) |
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| 393 | if( DEBUG_VMM_SET_COW < cycle ) |
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[433] | 394 | printk("\n[DBG] %s : thread %x handling vseg %s / vpn_base = %x / vpn_size = %x\n", |
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| 395 | __FUNCTION__, CURRENT_THREAD , vseg_type_str(type), vpn_base, vpn_size ); |
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| 396 | #endif |
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| 397 | // only DATA, ANON and REMOTE vsegs |
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[408] | 398 | if( (type == VSEG_TYPE_DATA) || |
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| 399 | (type == VSEG_TYPE_ANON) || |
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| 400 | (type == VSEG_TYPE_REMOTE) ) |
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| 401 | { |
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[433] | 402 | vpn_t vpn; |
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| 403 | uint32_t attr; |
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| 404 | ppn_t ppn; |
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| 405 | xptr_t page_xp; |
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| 406 | cxy_t page_cxy; |
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| 407 | page_t * page_ptr; |
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| 408 | xptr_t forks_xp; |
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| 409 | |
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| 410 | // update flags in remote GPT |
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| 411 | hal_gpt_set_cow( remote_gpt_xp, |
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| 412 | vpn_base, |
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| 413 | vpn_size ); |
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| 414 | |
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| 415 | // atomically increment pending forks counter in physical pages, |
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| 416 | // for all vseg pages that are mapped in reference cluster |
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| 417 | if( remote_process_cxy == local_cxy ) |
---|
| 418 | { |
---|
| 419 | // the reference GPT is the local GPT |
---|
| 420 | gpt_t * gpt = GET_PTR( remote_gpt_xp ); |
---|
| 421 | |
---|
| 422 | // scan all pages in vseg |
---|
| 423 | for( vpn = vpn_base ; vpn < (vpn_base + vpn_size) ; vpn++ ) |
---|
| 424 | { |
---|
| 425 | // get page attributes and PPN from reference GPT |
---|
| 426 | hal_gpt_get_pte( gpt , vpn , &attr , &ppn ); |
---|
| 427 | |
---|
| 428 | // atomically update pending forks counter if page is mapped |
---|
| 429 | if( attr & GPT_MAPPED ) |
---|
| 430 | { |
---|
| 431 | page_xp = ppm_ppn2page( ppn ); |
---|
| 432 | page_cxy = GET_CXY( page_xp ); |
---|
| 433 | page_ptr = GET_PTR( page_xp ); |
---|
| 434 | forks_xp = XPTR( page_cxy , &page_ptr->forks ); |
---|
| 435 | hal_remote_atomic_add( forks_xp , 1 ); |
---|
| 436 | } |
---|
| 437 | } // end loop on vpn |
---|
| 438 | } // end if local |
---|
| 439 | } // end if vseg type |
---|
| 440 | } // end loop on vsegs |
---|
[408] | 441 | } // end loop on process copies |
---|
| 442 | |
---|
[438] | 443 | #if DEBUG_VMM_SET_COW |
---|
[433] | 444 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 445 | if( DEBUG_VMM_SET_COW < cycle ) |
---|
[433] | 446 | printk("\n[DBG] %s : thread %x exit for process %x / cycle %d\n", |
---|
| 447 | __FUNCTION__ , CURRENT_THREAD , process->pid , cycle ); |
---|
| 448 | #endif |
---|
[408] | 449 | |
---|
| 450 | } // end vmm_set-cow() |
---|
| 451 | |
---|
| 452 | ///////////////////////////////////////////////// |
---|
| 453 | error_t vmm_fork_copy( process_t * child_process, |
---|
| 454 | xptr_t parent_process_xp ) |
---|
| 455 | { |
---|
| 456 | error_t error; |
---|
| 457 | cxy_t parent_cxy; |
---|
| 458 | process_t * parent_process; |
---|
| 459 | vmm_t * parent_vmm; |
---|
| 460 | xptr_t parent_lock_xp; |
---|
| 461 | vmm_t * child_vmm; |
---|
| 462 | xptr_t iter_xp; |
---|
| 463 | xptr_t parent_vseg_xp; |
---|
| 464 | vseg_t * parent_vseg; |
---|
| 465 | vseg_t * child_vseg; |
---|
| 466 | uint32_t type; |
---|
| 467 | bool_t cow; |
---|
| 468 | vpn_t vpn; |
---|
| 469 | vpn_t vpn_base; |
---|
| 470 | vpn_t vpn_size; |
---|
| 471 | xptr_t page_xp; |
---|
| 472 | page_t * page_ptr; |
---|
| 473 | cxy_t page_cxy; |
---|
| 474 | xptr_t parent_root_xp; |
---|
| 475 | bool_t mapped; |
---|
| 476 | ppn_t ppn; |
---|
| 477 | |
---|
[438] | 478 | #if DEBUG_VMM_FORK_COPY |
---|
[433] | 479 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 480 | if( DEBUG_VMM_FORK_COPY < cycle ) |
---|
[433] | 481 | printk("\n[DBG] %s : thread %x enter / cycle %d\n", |
---|
| 482 | __FUNCTION__ , CURRENT_THREAD, cycle ); |
---|
| 483 | #endif |
---|
[408] | 484 | |
---|
| 485 | // get parent process cluster and local pointer |
---|
| 486 | parent_cxy = GET_CXY( parent_process_xp ); |
---|
[433] | 487 | parent_process = GET_PTR( parent_process_xp ); |
---|
[408] | 488 | |
---|
| 489 | // get local pointers on parent and child VMM |
---|
| 490 | parent_vmm = &parent_process->vmm; |
---|
| 491 | child_vmm = &child_process->vmm; |
---|
| 492 | |
---|
| 493 | // get extended pointer on lock protecting the parent VSL |
---|
| 494 | parent_lock_xp = XPTR( parent_cxy , &parent_vmm->vsegs_lock ); |
---|
| 495 | |
---|
| 496 | // initialize the lock protecting the child VSL |
---|
| 497 | remote_rwlock_init( XPTR( local_cxy , &child_vmm->vsegs_lock ) ); |
---|
| 498 | |
---|
| 499 | // initialize the child VSL as empty |
---|
| 500 | xlist_root_init( XPTR( local_cxy, &child_vmm->vsegs_root ) ); |
---|
| 501 | child_vmm->vsegs_nr = 0; |
---|
| 502 | |
---|
[415] | 503 | // create child GPT |
---|
[408] | 504 | error = hal_gpt_create( &child_vmm->gpt ); |
---|
[415] | 505 | |
---|
[407] | 506 | if( error ) |
---|
| 507 | { |
---|
[408] | 508 | printk("\n[ERROR] in %s : cannot create GPT\n", __FUNCTION__ ); |
---|
| 509 | return -1; |
---|
[407] | 510 | } |
---|
| 511 | |
---|
[408] | 512 | // build extended pointer on parent VSL |
---|
| 513 | parent_root_xp = XPTR( parent_cxy , &parent_vmm->vsegs_root ); |
---|
| 514 | |
---|
[415] | 515 | // take the lock protecting the parent VSL |
---|
| 516 | remote_rwlock_rd_lock( parent_lock_xp ); |
---|
| 517 | |
---|
[408] | 518 | // loop on parent VSL xlist |
---|
| 519 | XLIST_FOREACH( parent_root_xp , iter_xp ) |
---|
[23] | 520 | { |
---|
[408] | 521 | // get local and extended pointers on current parent vseg |
---|
| 522 | parent_vseg_xp = XLIST_ELEMENT( iter_xp , vseg_t , xlist ); |
---|
[433] | 523 | parent_vseg = GET_PTR( parent_vseg_xp ); |
---|
[23] | 524 | |
---|
[408] | 525 | // get vseg type |
---|
| 526 | type = hal_remote_lw( XPTR( parent_cxy , &parent_vseg->type ) ); |
---|
| 527 | |
---|
[438] | 528 | #if DEBUG_VMM_FORK_COPY |
---|
[433] | 529 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 530 | if( DEBUG_VMM_FORK_COPY < cycle ) |
---|
[433] | 531 | printk("\n[DBG] %s : thread %x found parent vseg %s / vpn_base = %x / cycle %d\n", |
---|
| 532 | __FUNCTION__ , CURRENT_THREAD, vseg_type_str(type), |
---|
| 533 | hal_remote_lw( XPTR( parent_cxy , &parent_vseg->vpn_base ) ) , cycle ); |
---|
| 534 | #endif |
---|
[23] | 535 | |
---|
[408] | 536 | // all parent vsegs - but STACK - must be copied in child VSL |
---|
| 537 | if( type != VSEG_TYPE_STACK ) |
---|
[23] | 538 | { |
---|
[408] | 539 | // allocate memory for a new child vseg |
---|
| 540 | child_vseg = vseg_alloc(); |
---|
| 541 | if( child_vseg == NULL ) // release all allocated vsegs |
---|
[23] | 542 | { |
---|
[408] | 543 | vmm_destroy( child_process ); |
---|
| 544 | printk("\n[ERROR] in %s : cannot create vseg for child\n", __FUNCTION__ ); |
---|
| 545 | return -1; |
---|
[23] | 546 | } |
---|
| 547 | |
---|
[408] | 548 | // copy parent vseg to child vseg |
---|
| 549 | vseg_init_from_ref( child_vseg , parent_vseg_xp ); |
---|
[23] | 550 | |
---|
[408] | 551 | // register child vseg in child VSL |
---|
| 552 | vseg_attach( child_vmm , child_vseg ); |
---|
[407] | 553 | |
---|
[438] | 554 | #if DEBUG_VMM_FORK_COPY |
---|
[433] | 555 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 556 | if( DEBUG_VMM_FORK_COPY < cycle ) |
---|
[433] | 557 | printk("\n[DBG] %s : thread %x copied vseg %s / vpn_base = %x to child VSL / cycle %d\n", |
---|
| 558 | __FUNCTION__ , CURRENT_THREAD , vseg_type_str(type), |
---|
| 559 | hal_remote_lw( XPTR( parent_cxy , &parent_vseg->vpn_base ) ) , cycle ); |
---|
| 560 | #endif |
---|
[23] | 561 | |
---|
[408] | 562 | // copy DATA, MMAP, REMOTE, FILE parent GPT entries to child GPT |
---|
| 563 | if( type != VSEG_TYPE_CODE ) |
---|
| 564 | { |
---|
| 565 | // activate the COW for DATA, MMAP, REMOTE vsegs only |
---|
| 566 | cow = ( type != VSEG_TYPE_FILE ); |
---|
[23] | 567 | |
---|
[408] | 568 | vpn_base = child_vseg->vpn_base; |
---|
| 569 | vpn_size = child_vseg->vpn_size; |
---|
[23] | 570 | |
---|
[408] | 571 | // scan pages in parent vseg |
---|
| 572 | for( vpn = vpn_base ; vpn < (vpn_base + vpn_size) ; vpn++ ) |
---|
| 573 | { |
---|
| 574 | error = hal_gpt_pte_copy( &child_vmm->gpt, |
---|
| 575 | XPTR( parent_cxy , &parent_vmm->gpt ), |
---|
| 576 | vpn, |
---|
| 577 | cow, |
---|
| 578 | &ppn, |
---|
| 579 | &mapped ); |
---|
| 580 | if( error ) |
---|
| 581 | { |
---|
| 582 | vmm_destroy( child_process ); |
---|
| 583 | printk("\n[ERROR] in %s : cannot copy GPT\n", __FUNCTION__ ); |
---|
| 584 | return -1; |
---|
| 585 | } |
---|
| 586 | |
---|
[433] | 587 | // increment pending forks counter in page if mapped |
---|
[408] | 588 | if( mapped ) |
---|
| 589 | { |
---|
| 590 | page_xp = ppm_ppn2page( ppn ); |
---|
| 591 | page_cxy = GET_CXY( page_xp ); |
---|
[433] | 592 | page_ptr = GET_PTR( page_xp ); |
---|
| 593 | hal_remote_atomic_add( XPTR( page_cxy , &page_ptr->forks ) , 1 ); |
---|
[408] | 594 | |
---|
[438] | 595 | #if DEBUG_VMM_FORK_COPY |
---|
[433] | 596 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 597 | if( DEBUG_VMM_FORK_COPY < cycle ) |
---|
[433] | 598 | printk("\n[DBG] %s : thread %x copied vpn %x to child GPT / cycle %d\n", |
---|
| 599 | __FUNCTION__ , CURRENT_THREAD , vpn , cycle ); |
---|
| 600 | #endif |
---|
[408] | 601 | |
---|
| 602 | } |
---|
| 603 | } |
---|
| 604 | } // end if no code & no stack |
---|
| 605 | } // end if no stack |
---|
| 606 | } // end loop on vsegs |
---|
| 607 | |
---|
| 608 | // release the parent vsegs lock |
---|
| 609 | remote_rwlock_rd_unlock( parent_lock_xp ); |
---|
| 610 | |
---|
[415] | 611 | // initialize child GPT (architecture specic) |
---|
| 612 | // => For TSAR, identity map the kentry_vseg |
---|
| 613 | error = hal_vmm_init( child_vmm ); |
---|
| 614 | |
---|
| 615 | if( error ) |
---|
| 616 | { |
---|
| 617 | printk("\n[ERROR] in %s : cannot create GPT\n", __FUNCTION__ ); |
---|
| 618 | return -1; |
---|
| 619 | } |
---|
| 620 | |
---|
[408] | 621 | // initialize the child VMM STACK allocator |
---|
| 622 | child_vmm->stack_mgr.bitmap = 0; |
---|
| 623 | child_vmm->stack_mgr.vpn_base = CONFIG_VMM_STACK_BASE; |
---|
| 624 | |
---|
| 625 | // initialize the child VMM MMAP allocator |
---|
[23] | 626 | uint32_t i; |
---|
[408] | 627 | child_vmm->mmap_mgr.vpn_base = CONFIG_VMM_HEAP_BASE; |
---|
| 628 | child_vmm->mmap_mgr.vpn_size = CONFIG_VMM_STACK_BASE - CONFIG_VMM_HEAP_BASE; |
---|
| 629 | child_vmm->mmap_mgr.first_free_vpn = CONFIG_VMM_HEAP_BASE; |
---|
| 630 | for( i = 0 ; i < 32 ; i++ ) list_root_init( &child_vmm->mmap_mgr.zombi_list[i] ); |
---|
[23] | 631 | |
---|
[178] | 632 | // initialize instrumentation counters |
---|
[408] | 633 | child_vmm->pgfault_nr = 0; |
---|
[23] | 634 | |
---|
[408] | 635 | // copy base addresses from parent VMM to child VMM |
---|
| 636 | child_vmm->kent_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->kent_vpn_base)); |
---|
| 637 | child_vmm->args_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->args_vpn_base)); |
---|
| 638 | child_vmm->envs_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->envs_vpn_base)); |
---|
| 639 | child_vmm->heap_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->heap_vpn_base)); |
---|
| 640 | child_vmm->code_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->code_vpn_base)); |
---|
| 641 | child_vmm->data_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->data_vpn_base)); |
---|
[23] | 642 | |
---|
[408] | 643 | child_vmm->entry_point = (intptr_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->entry_point)); |
---|
[23] | 644 | |
---|
[124] | 645 | hal_fence(); |
---|
[23] | 646 | |
---|
[438] | 647 | #if DEBUG_VMM_FORK_COPY |
---|
[433] | 648 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 649 | if( DEBUG_VMM_FORK_COPY < cycle ) |
---|
[433] | 650 | printk("\n[DBG] %s : thread %x exit successfully / cycle %d\n", |
---|
| 651 | __FUNCTION__ , CURRENT_THREAD , cycle ); |
---|
| 652 | #endif |
---|
| 653 | |
---|
[23] | 654 | return 0; |
---|
| 655 | |
---|
[408] | 656 | } // vmm_fork_copy() |
---|
[204] | 657 | |
---|
[1] | 658 | /////////////////////////////////////// |
---|
| 659 | void vmm_destroy( process_t * process ) |
---|
| 660 | { |
---|
[408] | 661 | xptr_t vseg_xp; |
---|
[1] | 662 | vseg_t * vseg; |
---|
| 663 | |
---|
[438] | 664 | #if DEBUG_VMM_DESTROY |
---|
[433] | 665 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 666 | if( DEBUG_VMM_DESTROY < cycle ) |
---|
[443] | 667 | printk("\n[DBG] %s : thread %x enter for process %x in cluster %x / cycle %d\n", |
---|
| 668 | __FUNCTION__ , CURRENT_THREAD , process->pid , local_cxy , cycle ); |
---|
[433] | 669 | #endif |
---|
[416] | 670 | |
---|
[438] | 671 | #if (DEBUG_VMM_DESTROY & 1 ) |
---|
[443] | 672 | if( DEBUG_VMM_DESTROY < cycle ) |
---|
[437] | 673 | vmm_display( process , true ); |
---|
| 674 | #endif |
---|
| 675 | |
---|
[433] | 676 | // get pointer on local VMM |
---|
[1] | 677 | vmm_t * vmm = &process->vmm; |
---|
| 678 | |
---|
[408] | 679 | // get extended pointer on VSL root and VSL lock |
---|
| 680 | xptr_t root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
---|
| 681 | xptr_t lock_xp = XPTR( local_cxy , &vmm->vsegs_lock ); |
---|
| 682 | |
---|
[1] | 683 | // get lock protecting vseg list |
---|
[408] | 684 | remote_rwlock_wr_lock( lock_xp ); |
---|
[1] | 685 | |
---|
[409] | 686 | // remove all user vsegs registered in VSL |
---|
[408] | 687 | while( !xlist_is_empty( root_xp ) ) |
---|
[1] | 688 | { |
---|
[409] | 689 | // get pointer on first vseg in VSL |
---|
[408] | 690 | vseg_xp = XLIST_FIRST_ELEMENT( root_xp , vseg_t , xlist ); |
---|
[433] | 691 | vseg = GET_PTR( vseg_xp ); |
---|
[409] | 692 | |
---|
[438] | 693 | #if( DEBUG_VMM_DESTROY & 1 ) |
---|
| 694 | if( DEBUG_VMM_DESTROY < cycle ) |
---|
[443] | 695 | printk("\n[DBG] %s : found %s vseg / vpn_base %x / vpn_size %d\n", |
---|
[437] | 696 | __FUNCTION__ , vseg_type_str( vseg->type ), vseg->vpn_base, vseg->vpn_size ); |
---|
| 697 | #endif |
---|
| 698 | // unmap and release physical pages |
---|
[409] | 699 | vmm_unmap_vseg( process , vseg ); |
---|
| 700 | |
---|
| 701 | // remove vseg from VSL |
---|
[1] | 702 | vseg_detach( vmm , vseg ); |
---|
[409] | 703 | |
---|
| 704 | // release memory allocated to vseg descriptor |
---|
[1] | 705 | vseg_free( vseg ); |
---|
[443] | 706 | |
---|
| 707 | #if( DEBUG_VMM_DESTROY & 1 ) |
---|
| 708 | if( DEBUG_VMM_DESTROY < cycle ) |
---|
| 709 | printk("\n[DBG] %s : %s vseg released / vpn_base %x / vpn_size %d\n", |
---|
| 710 | __FUNCTION__ , vseg_type_str( vseg->type ), vseg->vpn_base, vseg->vpn_size ); |
---|
| 711 | #endif |
---|
| 712 | |
---|
[1] | 713 | } |
---|
| 714 | |
---|
[433] | 715 | // release lock protecting VSL |
---|
[408] | 716 | remote_rwlock_wr_unlock( lock_xp ); |
---|
[1] | 717 | |
---|
| 718 | // remove all vsegs from zombi_lists in MMAP allocator |
---|
| 719 | uint32_t i; |
---|
| 720 | for( i = 0 ; i<32 ; i++ ) |
---|
| 721 | { |
---|
| 722 | while( !list_is_empty( &vmm->mmap_mgr.zombi_list[i] ) ) |
---|
| 723 | { |
---|
[408] | 724 | vseg = LIST_FIRST( &vmm->mmap_mgr.zombi_list[i] , vseg_t , zlist ); |
---|
[443] | 725 | |
---|
| 726 | #if( DEBUG_VMM_DESTROY & 1 ) |
---|
| 727 | if( DEBUG_VMM_DESTROY < cycle ) |
---|
| 728 | printk("\n[DBG] %s : found zombi vseg / vpn_base %x / vpn_size %d\n", |
---|
| 729 | __FUNCTION__ , vseg_type_str( vseg->type ), vseg->vpn_base, vseg->vpn_size ); |
---|
| 730 | #endif |
---|
[1] | 731 | vseg_detach( vmm , vseg ); |
---|
| 732 | vseg_free( vseg ); |
---|
[443] | 733 | |
---|
| 734 | #if( DEBUG_VMM_DESTROY & 1 ) |
---|
| 735 | if( DEBUG_VMM_DESTROY < cycle ) |
---|
| 736 | printk("\n[DBG] %s : zombi vseg released / vpn_base %x / vpn_size %d\n", |
---|
| 737 | __FUNCTION__ , vseg_type_str( vseg->type ), vseg->vpn_base, vseg->vpn_size ); |
---|
| 738 | #endif |
---|
[1] | 739 | } |
---|
| 740 | } |
---|
| 741 | |
---|
[409] | 742 | // release memory allocated to the GPT itself |
---|
[1] | 743 | hal_gpt_destroy( &vmm->gpt ); |
---|
| 744 | |
---|
[438] | 745 | #if DEBUG_VMM_DESTROY |
---|
[433] | 746 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 747 | if( DEBUG_VMM_DESTROY < cycle ) |
---|
[443] | 748 | printk("\n[DBG] %s : thread %x exit for process %x in cluster %x / cycle %d\n", |
---|
| 749 | __FUNCTION__ , CURRENT_THREAD , process->pid , local_cxy , cycle ); |
---|
[433] | 750 | #endif |
---|
[416] | 751 | |
---|
[204] | 752 | } // end vmm_destroy() |
---|
| 753 | |
---|
[1] | 754 | ///////////////////////////////////////////////// |
---|
| 755 | vseg_t * vmm_check_conflict( process_t * process, |
---|
[21] | 756 | vpn_t vpn_base, |
---|
[1] | 757 | vpn_t vpn_size ) |
---|
| 758 | { |
---|
| 759 | vmm_t * vmm = &process->vmm; |
---|
[408] | 760 | |
---|
| 761 | // scan the VSL |
---|
[1] | 762 | vseg_t * vseg; |
---|
[408] | 763 | xptr_t iter_xp; |
---|
| 764 | xptr_t vseg_xp; |
---|
| 765 | xptr_t root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
---|
[1] | 766 | |
---|
[408] | 767 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
[1] | 768 | { |
---|
[408] | 769 | vseg_xp = XLIST_ELEMENT( iter_xp , vseg_t , xlist ); |
---|
[433] | 770 | vseg = GET_PTR( vseg_xp ); |
---|
[204] | 771 | |
---|
[21] | 772 | if( ((vpn_base + vpn_size) > vseg->vpn_base) && |
---|
| 773 | (vpn_base < (vseg->vpn_base + vseg->vpn_size)) ) return vseg; |
---|
[1] | 774 | } |
---|
| 775 | return NULL; |
---|
| 776 | |
---|
[204] | 777 | } // end vmm_check_conflict() |
---|
| 778 | |
---|
[1] | 779 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 780 | // This static function is called by the vmm_create_vseg() function, and implements |
---|
| 781 | // the VMM stack_vseg specific allocator. |
---|
| 782 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 783 | // @ vmm : pointer on VMM. |
---|
[21] | 784 | // @ vpn_base : (return value) first allocated page |
---|
[1] | 785 | // @ vpn_size : (return value) number of allocated pages |
---|
| 786 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 787 | static error_t vmm_stack_alloc( vmm_t * vmm, |
---|
| 788 | vpn_t * vpn_base, |
---|
| 789 | vpn_t * vpn_size ) |
---|
| 790 | { |
---|
| 791 | // get stack allocator pointer |
---|
| 792 | stack_mgr_t * mgr = &vmm->stack_mgr; |
---|
| 793 | |
---|
| 794 | // get lock on stack allocator |
---|
| 795 | spinlock_lock( &mgr->lock ); |
---|
| 796 | |
---|
| 797 | // get first free slot index in bitmap |
---|
| 798 | int32_t index = bitmap_ffc( &mgr->bitmap , 4 ); |
---|
[179] | 799 | if( (index < 0) || (index > 31) ) |
---|
| 800 | { |
---|
| 801 | spinlock_unlock( &mgr->lock ); |
---|
| 802 | return ENOMEM; |
---|
| 803 | } |
---|
[1] | 804 | |
---|
| 805 | // update bitmap |
---|
| 806 | bitmap_set( &mgr->bitmap , index ); |
---|
[21] | 807 | |
---|
[1] | 808 | // release lock on stack allocator |
---|
| 809 | spinlock_unlock( &mgr->lock ); |
---|
| 810 | |
---|
[21] | 811 | // returns vpn_base, vpn_size (one page non allocated) |
---|
[1] | 812 | *vpn_base = mgr->vpn_base + index * CONFIG_VMM_STACK_SIZE + 1; |
---|
| 813 | *vpn_size = CONFIG_VMM_STACK_SIZE - 1; |
---|
| 814 | return 0; |
---|
| 815 | |
---|
[204] | 816 | } // end vmm_stack_alloc() |
---|
| 817 | |
---|
[1] | 818 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 819 | // This static function is called by the vmm_create_vseg() function, and implements |
---|
| 820 | // the VMM MMAP specific allocator. |
---|
| 821 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 822 | // @ vmm : [in] pointer on VMM. |
---|
| 823 | // @ npages : [in] requested number of pages. |
---|
[21] | 824 | // @ vpn_base : [out] first allocated page. |
---|
[1] | 825 | // @ vpn_size : [out] actual number of allocated pages. |
---|
| 826 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 827 | static error_t vmm_mmap_alloc( vmm_t * vmm, |
---|
| 828 | vpn_t npages, |
---|
| 829 | vpn_t * vpn_base, |
---|
| 830 | vpn_t * vpn_size ) |
---|
| 831 | { |
---|
| 832 | uint32_t index; |
---|
| 833 | vseg_t * vseg; |
---|
| 834 | vpn_t base; |
---|
| 835 | vpn_t size; |
---|
[21] | 836 | vpn_t free; |
---|
[1] | 837 | |
---|
[21] | 838 | // mmap vseg size must be power of 2 |
---|
[1] | 839 | // compute actual size and index in zombi_list array |
---|
| 840 | size = POW2_ROUNDUP( npages ); |
---|
| 841 | index = bits_log2( size ); |
---|
| 842 | |
---|
| 843 | // get mmap allocator pointer |
---|
| 844 | mmap_mgr_t * mgr = &vmm->mmap_mgr; |
---|
| 845 | |
---|
| 846 | // get lock on mmap allocator |
---|
| 847 | spinlock_lock( &mgr->lock ); |
---|
| 848 | |
---|
| 849 | // get vseg from zombi_list or from mmap zone |
---|
| 850 | if( list_is_empty( &mgr->zombi_list[index] ) ) // from mmap zone |
---|
| 851 | { |
---|
| 852 | // check overflow |
---|
| 853 | free = mgr->first_free_vpn; |
---|
| 854 | if( (free + size) > mgr->vpn_size ) return ENOMEM; |
---|
| 855 | |
---|
| 856 | // update STACK allocator |
---|
| 857 | mgr->first_free_vpn += size; |
---|
| 858 | |
---|
| 859 | // compute base |
---|
| 860 | base = free; |
---|
| 861 | } |
---|
| 862 | else // from zombi_list |
---|
| 863 | { |
---|
| 864 | // get pointer on zombi vseg from zombi_list |
---|
[408] | 865 | vseg = LIST_FIRST( &mgr->zombi_list[index] , vseg_t , zlist ); |
---|
[1] | 866 | |
---|
| 867 | // remove vseg from free-list |
---|
[408] | 868 | list_unlink( &vseg->zlist ); |
---|
[1] | 869 | |
---|
| 870 | // compute base |
---|
| 871 | base = vseg->vpn_base; |
---|
[21] | 872 | } |
---|
| 873 | |
---|
[1] | 874 | // release lock on mmap allocator |
---|
| 875 | spinlock_unlock( &mgr->lock ); |
---|
| 876 | |
---|
| 877 | // returns vpn_base, vpn_size |
---|
| 878 | *vpn_base = base; |
---|
| 879 | *vpn_size = size; |
---|
| 880 | return 0; |
---|
| 881 | |
---|
[204] | 882 | } // end vmm_mmap_alloc() |
---|
| 883 | |
---|
[407] | 884 | //////////////////////////////////////////////// |
---|
| 885 | vseg_t * vmm_create_vseg( process_t * process, |
---|
| 886 | vseg_type_t type, |
---|
| 887 | intptr_t base, |
---|
| 888 | uint32_t size, |
---|
| 889 | uint32_t file_offset, |
---|
| 890 | uint32_t file_size, |
---|
| 891 | xptr_t mapper_xp, |
---|
| 892 | cxy_t cxy ) |
---|
[1] | 893 | { |
---|
| 894 | vseg_t * vseg; // created vseg pointer |
---|
[204] | 895 | vpn_t vpn_base; // first page index |
---|
[1] | 896 | vpn_t vpn_size; // number of pages |
---|
| 897 | error_t error; |
---|
| 898 | |
---|
[438] | 899 | #if DEBUG_VMM_CREATE_VSEG |
---|
[433] | 900 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 901 | if( DEBUG_VMM_CREATE_VSEG < cycle ) |
---|
[433] | 902 | printk("\n[DBG] %s : thread %x enter / process %x / base %x / size %x / %s / cxy %x / cycle %d\n", |
---|
| 903 | __FUNCTION__, CURRENT_THREAD, process->pid, base, size, vseg_type_str(type), cxy, cycle ); |
---|
| 904 | #endif |
---|
[21] | 905 | |
---|
[407] | 906 | // get pointer on VMM |
---|
| 907 | vmm_t * vmm = &process->vmm; |
---|
[21] | 908 | |
---|
[204] | 909 | // compute base, size, vpn_base, vpn_size, depending on vseg type |
---|
[407] | 910 | // we use the VMM specific allocators for "stack", "file", "anon", & "remote" vsegs |
---|
[1] | 911 | if( type == VSEG_TYPE_STACK ) |
---|
| 912 | { |
---|
| 913 | // get vpn_base and vpn_size from STACK allocator |
---|
| 914 | error = vmm_stack_alloc( vmm , &vpn_base , &vpn_size ); |
---|
| 915 | if( error ) |
---|
| 916 | { |
---|
[407] | 917 | printk("\n[ERROR] in %s : no space for stack vseg / process %x in cluster %x\n", |
---|
| 918 | __FUNCTION__ , process->pid , local_cxy ); |
---|
[1] | 919 | return NULL; |
---|
| 920 | } |
---|
| 921 | |
---|
| 922 | // compute vseg base and size from vpn_base and vpn_size |
---|
| 923 | base = vpn_base << CONFIG_PPM_PAGE_SHIFT; |
---|
| 924 | size = vpn_size << CONFIG_PPM_PAGE_SHIFT; |
---|
| 925 | } |
---|
[21] | 926 | else if( (type == VSEG_TYPE_ANON) || |
---|
| 927 | (type == VSEG_TYPE_FILE) || |
---|
[1] | 928 | (type == VSEG_TYPE_REMOTE) ) |
---|
| 929 | { |
---|
| 930 | // get vpn_base and vpn_size from MMAP allocator |
---|
| 931 | vpn_t npages = size >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 932 | error = vmm_mmap_alloc( vmm , npages , &vpn_base , &vpn_size ); |
---|
| 933 | if( error ) |
---|
| 934 | { |
---|
| 935 | printk("\n[ERROR] in %s : no vspace for mmap vseg / process %x in cluster %x\n", |
---|
| 936 | __FUNCTION__ , process->pid , local_cxy ); |
---|
| 937 | return NULL; |
---|
| 938 | } |
---|
| 939 | |
---|
| 940 | // compute vseg base and size from vpn_base and vpn_size |
---|
| 941 | base = vpn_base << CONFIG_PPM_PAGE_SHIFT; |
---|
| 942 | size = vpn_size << CONFIG_PPM_PAGE_SHIFT; |
---|
| 943 | } |
---|
| 944 | else |
---|
| 945 | { |
---|
[204] | 946 | uint32_t vpn_min = base >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 947 | uint32_t vpn_max = (base + size - 1) >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 948 | |
---|
| 949 | vpn_base = vpn_min; |
---|
| 950 | vpn_size = vpn_max - vpn_min + 1; |
---|
[1] | 951 | } |
---|
| 952 | |
---|
| 953 | // check collisions |
---|
| 954 | vseg = vmm_check_conflict( process , vpn_base , vpn_size ); |
---|
| 955 | if( vseg != NULL ) |
---|
| 956 | { |
---|
[21] | 957 | printk("\n[ERROR] in %s for process %x : new vseg [vpn_base = %x / vpn_size = %x]\n" |
---|
[1] | 958 | " overlap existing vseg [vpn_base = %x / vpn_size = %x]\n", |
---|
[407] | 959 | __FUNCTION__ , process->pid, vpn_base, vpn_size, vseg->vpn_base, vseg->vpn_size ); |
---|
[1] | 960 | return NULL; |
---|
| 961 | } |
---|
| 962 | |
---|
| 963 | // allocate physical memory for vseg descriptor |
---|
| 964 | vseg = vseg_alloc(); |
---|
| 965 | if( vseg == NULL ) |
---|
| 966 | { |
---|
| 967 | printk("\n[ERROR] in %s for process %x : cannot allocate memory for vseg\n", |
---|
[407] | 968 | __FUNCTION__ , process->pid ); |
---|
[1] | 969 | return NULL; |
---|
| 970 | } |
---|
| 971 | |
---|
| 972 | // initialize vseg descriptor |
---|
[407] | 973 | vseg_init( vseg, |
---|
| 974 | type, |
---|
| 975 | base, |
---|
| 976 | size, |
---|
| 977 | vpn_base, |
---|
| 978 | vpn_size, |
---|
| 979 | file_offset, |
---|
| 980 | file_size, |
---|
| 981 | mapper_xp, |
---|
| 982 | cxy ); |
---|
[1] | 983 | |
---|
[408] | 984 | // attach vseg to VSL |
---|
| 985 | xptr_t lock_xp = XPTR( local_cxy , &vmm->vsegs_lock ); |
---|
| 986 | remote_rwlock_wr_lock( lock_xp ); |
---|
[1] | 987 | vseg_attach( vmm , vseg ); |
---|
[408] | 988 | remote_rwlock_wr_unlock( lock_xp ); |
---|
[1] | 989 | |
---|
[438] | 990 | #if DEBUG_VMM_CREATE_VSEG |
---|
[433] | 991 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 992 | if( DEBUG_VMM_CREATE_VSEG < cycle ) |
---|
[433] | 993 | printk("\n[DBG] %s : thread %x exit / process %x / %s / cxy %x / cycle %d\n", |
---|
| 994 | __FUNCTION__, CURRENT_THREAD, process->pid, vseg_type_str(type), cxy, cycle ); |
---|
| 995 | #endif |
---|
[21] | 996 | |
---|
[1] | 997 | return vseg; |
---|
| 998 | |
---|
[406] | 999 | } // vmm_create_vseg() |
---|
| 1000 | |
---|
[1] | 1001 | ///////////////////////////////////// |
---|
| 1002 | void vmm_remove_vseg( vseg_t * vseg ) |
---|
| 1003 | { |
---|
| 1004 | // get pointers on calling process and VMM |
---|
| 1005 | thread_t * this = CURRENT_THREAD; |
---|
| 1006 | process_t * process = this->process; |
---|
| 1007 | vmm_t * vmm = &this->process->vmm; |
---|
| 1008 | uint32_t type = vseg->type; |
---|
| 1009 | |
---|
[408] | 1010 | // detach vseg from VSL |
---|
| 1011 | xptr_t lock_xp = XPTR( local_cxy , &vmm->vsegs_lock ); |
---|
| 1012 | remote_rwlock_wr_lock( lock_xp ); |
---|
| 1013 | vseg_detach( &process->vmm , vseg ); |
---|
| 1014 | remote_rwlock_wr_unlock( lock_xp ); |
---|
[1] | 1015 | |
---|
| 1016 | // release the stack slot to VMM stack allocator if STACK type |
---|
| 1017 | if( type == VSEG_TYPE_STACK ) |
---|
| 1018 | { |
---|
| 1019 | // get pointer on stack allocator |
---|
| 1020 | stack_mgr_t * mgr = &vmm->stack_mgr; |
---|
| 1021 | |
---|
| 1022 | // compute slot index |
---|
| 1023 | uint32_t index = ((vseg->vpn_base - mgr->vpn_base - 1) / CONFIG_VMM_STACK_SIZE); |
---|
| 1024 | |
---|
| 1025 | // update stacks_bitmap |
---|
| 1026 | spinlock_lock( &mgr->lock ); |
---|
| 1027 | bitmap_clear( &mgr->bitmap , index ); |
---|
| 1028 | spinlock_unlock( &mgr->lock ); |
---|
| 1029 | } |
---|
| 1030 | |
---|
| 1031 | // release the vseg to VMM mmap allocator if MMAP type |
---|
| 1032 | if( (type == VSEG_TYPE_ANON) || (type == VSEG_TYPE_FILE) || (type == VSEG_TYPE_REMOTE) ) |
---|
| 1033 | { |
---|
| 1034 | // get pointer on mmap allocator |
---|
| 1035 | mmap_mgr_t * mgr = &vmm->mmap_mgr; |
---|
| 1036 | |
---|
| 1037 | // compute zombi_list index |
---|
| 1038 | uint32_t index = bits_log2( vseg->vpn_size ); |
---|
| 1039 | |
---|
| 1040 | // update zombi_list |
---|
| 1041 | spinlock_lock( &mgr->lock ); |
---|
[408] | 1042 | list_add_first( &mgr->zombi_list[index] , &vseg->zlist ); |
---|
[1] | 1043 | spinlock_unlock( &mgr->lock ); |
---|
| 1044 | } |
---|
| 1045 | |
---|
| 1046 | // release physical memory allocated for vseg descriptor if no MMAP type |
---|
| 1047 | if( (type != VSEG_TYPE_ANON) && (type != VSEG_TYPE_FILE) && (type != VSEG_TYPE_REMOTE) ) |
---|
| 1048 | { |
---|
| 1049 | vseg_free( vseg ); |
---|
| 1050 | } |
---|
[407] | 1051 | } // end vmm_remove_vseg() |
---|
[1] | 1052 | |
---|
| 1053 | ///////////////////////////////////////// |
---|
| 1054 | void vmm_unmap_vseg( process_t * process, |
---|
| 1055 | vseg_t * vseg ) |
---|
| 1056 | { |
---|
[21] | 1057 | vpn_t vpn; // VPN of current PTE |
---|
| 1058 | vpn_t vpn_min; // VPN of first PTE |
---|
[1] | 1059 | vpn_t vpn_max; // VPN of last PTE (excluded) |
---|
[409] | 1060 | ppn_t ppn; // current PTE ppn value |
---|
| 1061 | uint32_t attr; // current PTE attributes |
---|
| 1062 | kmem_req_t req; // request to release memory |
---|
| 1063 | xptr_t page_xp; // extended pointer on page descriptor |
---|
| 1064 | cxy_t page_cxy; // page descriptor cluster |
---|
| 1065 | page_t * page_ptr; // page descriptor pointer |
---|
[433] | 1066 | xptr_t forks_xp; // extended pointer on pending forks counter |
---|
| 1067 | uint32_t count; // actual number of pendinf forks |
---|
[1] | 1068 | |
---|
[438] | 1069 | #if DEBUG_VMM_UNMAP_VSEG |
---|
[433] | 1070 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1071 | if( DEBUG_VMM_UNMAP_VSEG < cycle ) |
---|
[433] | 1072 | printk("\n[DBG] %s : thread %x enter / process %x / vseg %s / base %x / cycle %d\n", |
---|
| 1073 | __FUNCTION__, CURRENT_THREAD, process->pid, vseg_type_str( vseg->type ), vseg->vpn_base, cycle ); |
---|
| 1074 | #endif |
---|
[409] | 1075 | |
---|
[433] | 1076 | // get pointer on local GPT |
---|
[1] | 1077 | gpt_t * gpt = &process->vmm.gpt; |
---|
| 1078 | |
---|
| 1079 | // loop on pages in vseg |
---|
| 1080 | vpn_min = vseg->vpn_base; |
---|
| 1081 | vpn_max = vpn_min + vseg->vpn_size; |
---|
| 1082 | for( vpn = vpn_min ; vpn < vpn_max ; vpn++ ) |
---|
| 1083 | { |
---|
[409] | 1084 | // get GPT entry |
---|
| 1085 | hal_gpt_get_pte( gpt , vpn , &attr , &ppn ); |
---|
| 1086 | |
---|
| 1087 | if( attr & GPT_MAPPED ) // entry is mapped |
---|
| 1088 | { |
---|
[437] | 1089 | |
---|
[438] | 1090 | #if( DEBUG_VMM_UNMAP_VSEG & 1 ) |
---|
| 1091 | if( DEBUG_VMM_UNMAP_VSEG < cycle ) |
---|
[437] | 1092 | printk("- vpn %x / ppn %x\n" , vpn , ppn ); |
---|
| 1093 | #endif |
---|
| 1094 | |
---|
[409] | 1095 | // check small page |
---|
| 1096 | assert( (attr & GPT_SMALL) , __FUNCTION__ , |
---|
| 1097 | "an user vseg must use small pages" ); |
---|
| 1098 | |
---|
[433] | 1099 | // unmap GPT entry in all GPT copies |
---|
[409] | 1100 | hal_gpt_reset_pte( gpt , vpn ); |
---|
| 1101 | |
---|
[433] | 1102 | // handle pending forks counter if |
---|
| 1103 | // 1) not identity mapped |
---|
| 1104 | // 2) running in reference cluster |
---|
| 1105 | if( ((vseg->flags & VSEG_IDENT) == 0) && |
---|
| 1106 | (GET_CXY( process->ref_xp ) == local_cxy) ) |
---|
[409] | 1107 | { |
---|
[433] | 1108 | // get extended pointer on physical page descriptor |
---|
[409] | 1109 | page_xp = ppm_ppn2page( ppn ); |
---|
| 1110 | page_cxy = GET_CXY( page_xp ); |
---|
[433] | 1111 | page_ptr = GET_PTR( page_xp ); |
---|
[409] | 1112 | |
---|
[433] | 1113 | // FIXME lock the physical page |
---|
| 1114 | |
---|
| 1115 | // get pending forks counter |
---|
[437] | 1116 | count = hal_remote_lw( XPTR( page_cxy , &page_ptr->forks ) ); |
---|
[433] | 1117 | |
---|
| 1118 | if( count ) // decrement pending forks counter |
---|
[409] | 1119 | { |
---|
[437] | 1120 | forks_xp = XPTR( page_cxy , &page_ptr->forks ); |
---|
[433] | 1121 | hal_remote_atomic_add( forks_xp , -1 ); |
---|
| 1122 | } |
---|
| 1123 | else // release physical page to relevant cluster |
---|
[409] | 1124 | { |
---|
[433] | 1125 | if( page_cxy == local_cxy ) // local cluster |
---|
| 1126 | { |
---|
| 1127 | req.type = KMEM_PAGE; |
---|
| 1128 | req.ptr = page_ptr; |
---|
| 1129 | kmem_free( &req ); |
---|
| 1130 | } |
---|
| 1131 | else // remote cluster |
---|
| 1132 | { |
---|
| 1133 | rpc_pmem_release_pages_client( page_cxy , page_ptr ); |
---|
| 1134 | } |
---|
[409] | 1135 | } |
---|
[433] | 1136 | |
---|
| 1137 | // FIXME unlock the physical page |
---|
[409] | 1138 | } |
---|
| 1139 | } |
---|
[1] | 1140 | } |
---|
[433] | 1141 | |
---|
[438] | 1142 | #if DEBUG_VMM_UNMAP_VSEG |
---|
[433] | 1143 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1144 | if( DEBUG_VMM_UNMAP_VSEG < cycle ) |
---|
[433] | 1145 | printk("\n[DBG] %s : thread %x exit / process %x / vseg %s / base %x / cycle %d\n", |
---|
| 1146 | __FUNCTION__, CURRENT_THREAD, process->pid, vseg_type_str( vseg->type ), vseg->vpn_base, cycle ); |
---|
| 1147 | #endif |
---|
| 1148 | |
---|
[409] | 1149 | } // end vmm_unmap_vseg() |
---|
[1] | 1150 | |
---|
[407] | 1151 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
[440] | 1152 | // This low-level static function is called by the vmm_get_vseg(), vmm_get_pte(), |
---|
| 1153 | // and vmm_resize_vseg() functions. It scan the local VSL to find the unique vseg |
---|
| 1154 | // containing a given virtual address. |
---|
[407] | 1155 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
[406] | 1156 | // @ vmm : pointer on the process VMM. |
---|
| 1157 | // @ vaddr : virtual address. |
---|
| 1158 | // @ return vseg pointer if success / return NULL if not found. |
---|
[407] | 1159 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
[406] | 1160 | static vseg_t * vseg_from_vaddr( vmm_t * vmm, |
---|
| 1161 | intptr_t vaddr ) |
---|
| 1162 | { |
---|
[408] | 1163 | xptr_t iter_xp; |
---|
| 1164 | xptr_t vseg_xp; |
---|
| 1165 | vseg_t * vseg; |
---|
[406] | 1166 | |
---|
[408] | 1167 | // get extended pointers on VSL lock and root |
---|
| 1168 | xptr_t lock_xp = XPTR( local_cxy , &vmm->vsegs_lock ); |
---|
| 1169 | xptr_t root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
---|
[406] | 1170 | |
---|
[408] | 1171 | // get lock protecting the VSL |
---|
| 1172 | remote_rwlock_rd_lock( lock_xp ); |
---|
| 1173 | |
---|
| 1174 | // scan the list of vsegs in VSL |
---|
| 1175 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
[406] | 1176 | { |
---|
[408] | 1177 | vseg_xp = XLIST_ELEMENT( iter_xp , vseg_t , xlist ); |
---|
[433] | 1178 | vseg = GET_PTR( vseg_xp ); |
---|
[408] | 1179 | if( (vaddr >= vseg->min) && (vaddr < vseg->max) ) |
---|
| 1180 | { |
---|
| 1181 | // return success |
---|
| 1182 | remote_rwlock_rd_unlock( lock_xp ); |
---|
| 1183 | return vseg; |
---|
| 1184 | } |
---|
[406] | 1185 | } |
---|
| 1186 | |
---|
[408] | 1187 | // return failure |
---|
| 1188 | remote_rwlock_rd_unlock( lock_xp ); |
---|
| 1189 | return NULL; |
---|
[406] | 1190 | |
---|
[408] | 1191 | } // end vseg_from_vaddr() |
---|
[406] | 1192 | |
---|
[1] | 1193 | ///////////////////////////////////////////// |
---|
| 1194 | error_t vmm_resize_vseg( process_t * process, |
---|
| 1195 | intptr_t base, |
---|
| 1196 | intptr_t size ) |
---|
| 1197 | { |
---|
[406] | 1198 | error_t error; |
---|
| 1199 | vseg_t * new; |
---|
| 1200 | vpn_t vpn_min; |
---|
| 1201 | vpn_t vpn_max; |
---|
[1] | 1202 | |
---|
| 1203 | // get pointer on process VMM |
---|
| 1204 | vmm_t * vmm = &process->vmm; |
---|
| 1205 | |
---|
| 1206 | intptr_t addr_min = base; |
---|
| 1207 | intptr_t addr_max = base + size; |
---|
| 1208 | |
---|
| 1209 | // get pointer on vseg |
---|
[406] | 1210 | vseg_t * vseg = vseg_from_vaddr( vmm , base ); |
---|
[1] | 1211 | |
---|
| 1212 | if( vseg == NULL) return EINVAL; |
---|
[21] | 1213 | |
---|
[408] | 1214 | // get extended pointer on VSL lock |
---|
| 1215 | xptr_t lock_xp = XPTR( local_cxy , &vmm->vsegs_lock ); |
---|
[21] | 1216 | |
---|
[408] | 1217 | // get lock protecting VSL |
---|
| 1218 | remote_rwlock_wr_lock( lock_xp ); |
---|
| 1219 | |
---|
[1] | 1220 | if( (vseg->min > addr_min) || (vseg->max < addr_max) ) // region not included in vseg |
---|
| 1221 | { |
---|
| 1222 | error = EINVAL; |
---|
| 1223 | } |
---|
| 1224 | else if( (vseg->min == addr_min) && (vseg->max == addr_max) ) // vseg must be removed |
---|
| 1225 | { |
---|
| 1226 | vmm_remove_vseg( vseg ); |
---|
| 1227 | error = 0; |
---|
| 1228 | } |
---|
[406] | 1229 | else if( vseg->min == addr_min ) // vseg must be resized |
---|
[1] | 1230 | { |
---|
[406] | 1231 | // update vseg base address |
---|
| 1232 | vseg->min = addr_max; |
---|
| 1233 | |
---|
| 1234 | // update vpn_base and vpn_size |
---|
| 1235 | vpn_min = vseg->min >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1236 | vpn_max = (vseg->max - 1) >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1237 | vseg->vpn_base = vpn_min; |
---|
| 1238 | vseg->vpn_size = vpn_max - vpn_min + 1; |
---|
| 1239 | error = 0; |
---|
[1] | 1240 | } |
---|
[406] | 1241 | else if( vseg->max == addr_max ) // vseg must be resized |
---|
[1] | 1242 | { |
---|
[406] | 1243 | // update vseg max address |
---|
| 1244 | vseg->max = addr_min; |
---|
| 1245 | |
---|
| 1246 | // update vpn_base and vpn_size |
---|
| 1247 | vpn_min = vseg->min >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1248 | vpn_max = (vseg->max - 1) >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1249 | vseg->vpn_base = vpn_min; |
---|
| 1250 | vseg->vpn_size = vpn_max - vpn_min + 1; |
---|
| 1251 | error = 0; |
---|
[1] | 1252 | } |
---|
[406] | 1253 | else // vseg cut in three regions |
---|
[1] | 1254 | { |
---|
[406] | 1255 | // resize existing vseg |
---|
| 1256 | vseg->max = addr_min; |
---|
| 1257 | |
---|
| 1258 | // update vpn_base and vpn_size |
---|
| 1259 | vpn_min = vseg->min >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1260 | vpn_max = (vseg->max - 1) >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1261 | vseg->vpn_base = vpn_min; |
---|
| 1262 | vseg->vpn_size = vpn_max - vpn_min + 1; |
---|
| 1263 | |
---|
| 1264 | // create new vseg |
---|
[407] | 1265 | new = vmm_create_vseg( process, |
---|
| 1266 | vseg->type, |
---|
| 1267 | addr_min, |
---|
| 1268 | (vseg->max - addr_max), |
---|
| 1269 | vseg->file_offset, |
---|
| 1270 | vseg->file_size, |
---|
| 1271 | vseg->mapper_xp, |
---|
| 1272 | vseg->cxy ); |
---|
| 1273 | |
---|
[406] | 1274 | if( new == NULL ) error = EINVAL; |
---|
| 1275 | else error = 0; |
---|
[1] | 1276 | } |
---|
| 1277 | |
---|
| 1278 | // release VMM lock |
---|
[408] | 1279 | remote_rwlock_wr_unlock( lock_xp ); |
---|
[1] | 1280 | |
---|
| 1281 | return error; |
---|
| 1282 | |
---|
[406] | 1283 | } // vmm_resize_vseg() |
---|
| 1284 | |
---|
[1] | 1285 | /////////////////////////////////////////// |
---|
[388] | 1286 | error_t vmm_get_vseg( process_t * process, |
---|
[394] | 1287 | intptr_t vaddr, |
---|
[388] | 1288 | vseg_t ** found_vseg ) |
---|
[1] | 1289 | { |
---|
[440] | 1290 | xptr_t vseg_xp; |
---|
| 1291 | error_t error; |
---|
| 1292 | vseg_t * vseg; |
---|
| 1293 | vmm_t * vmm; |
---|
[1] | 1294 | |
---|
[440] | 1295 | // get pointer on local VMM |
---|
| 1296 | vmm = &process->vmm; |
---|
[1] | 1297 | |
---|
[440] | 1298 | // try to get vseg from local VMM |
---|
| 1299 | vseg = vseg_from_vaddr( vmm , vaddr ); |
---|
| 1300 | |
---|
[388] | 1301 | if( vseg == NULL ) // vseg not found in local cluster => try to get it from ref |
---|
| 1302 | { |
---|
| 1303 | // get extended pointer on reference process |
---|
| 1304 | xptr_t ref_xp = process->ref_xp; |
---|
[1] | 1305 | |
---|
[388] | 1306 | // get cluster and local pointer on reference process |
---|
| 1307 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
[433] | 1308 | process_t * ref_ptr = GET_PTR( ref_xp ); |
---|
[388] | 1309 | |
---|
| 1310 | if( local_cxy == ref_cxy ) return -1; // local cluster is the reference |
---|
| 1311 | |
---|
| 1312 | // get extended pointer on reference vseg |
---|
[394] | 1313 | rpc_vmm_get_vseg_client( ref_cxy , ref_ptr , vaddr , &vseg_xp , &error ); |
---|
[388] | 1314 | |
---|
[440] | 1315 | if( error ) return -1; // vseg not found => illegal user vaddr |
---|
[388] | 1316 | |
---|
| 1317 | // allocate a vseg in local cluster |
---|
| 1318 | vseg = vseg_alloc(); |
---|
| 1319 | |
---|
[440] | 1320 | if( vseg == NULL ) return -1; // cannot allocate a local vseg |
---|
[388] | 1321 | |
---|
| 1322 | // initialise local vseg from reference |
---|
| 1323 | vseg_init_from_ref( vseg , vseg_xp ); |
---|
| 1324 | |
---|
| 1325 | // register local vseg in local VMM |
---|
[406] | 1326 | vseg_attach( &process->vmm , vseg ); |
---|
[388] | 1327 | } |
---|
| 1328 | |
---|
| 1329 | // success |
---|
| 1330 | *found_vseg = vseg; |
---|
[394] | 1331 | return 0; |
---|
[388] | 1332 | |
---|
| 1333 | } // end vmm_get_vseg() |
---|
| 1334 | |
---|
[407] | 1335 | ////////////////////////////////////////////////////////////////////////////////////// |
---|
| 1336 | // This static function compute the target cluster to allocate a physical page |
---|
| 1337 | // for a given <vpn> in a given <vseg>, allocates the page (with an RPC if required) |
---|
| 1338 | // and returns an extended pointer on the allocated page descriptor. |
---|
| 1339 | // The vseg cannot have the FILE type. |
---|
| 1340 | ////////////////////////////////////////////////////////////////////////////////////// |
---|
| 1341 | static xptr_t vmm_page_allocate( vseg_t * vseg, |
---|
| 1342 | vpn_t vpn ) |
---|
| 1343 | { |
---|
[433] | 1344 | |
---|
[438] | 1345 | #if DEBUG_VMM_ALLOCATE_PAGE |
---|
| 1346 | if( DEBUG_VMM_ALLOCATE_PAGE < (uint32_t)hal_get_cycles() ) |
---|
[433] | 1347 | printk("\n[DBG] in %s : thread %x enter for vpn %x\n", |
---|
| 1348 | __FUNCTION__ , CURRENT_THREAD, vpn ); |
---|
| 1349 | #endif |
---|
| 1350 | |
---|
[407] | 1351 | // compute target cluster |
---|
| 1352 | page_t * page_ptr; |
---|
| 1353 | cxy_t page_cxy; |
---|
| 1354 | kmem_req_t req; |
---|
| 1355 | |
---|
| 1356 | uint32_t type = vseg->type; |
---|
| 1357 | uint32_t flags = vseg->flags; |
---|
| 1358 | |
---|
| 1359 | assert( ( type != VSEG_TYPE_FILE ) , __FUNCTION__ , "illegal vseg type\n" ); |
---|
| 1360 | |
---|
| 1361 | if( flags & VSEG_DISTRIB ) // distributed => cxy depends on vpn LSB |
---|
| 1362 | { |
---|
| 1363 | uint32_t x_size = LOCAL_CLUSTER->x_size; |
---|
| 1364 | uint32_t y_size = LOCAL_CLUSTER->y_size; |
---|
| 1365 | uint32_t y_width = LOCAL_CLUSTER->y_width; |
---|
| 1366 | uint32_t index = vpn & ((x_size * y_size) - 1); |
---|
| 1367 | uint32_t x = index / y_size; |
---|
| 1368 | uint32_t y = index % y_size; |
---|
| 1369 | page_cxy = (x<<y_width) + y; |
---|
| 1370 | } |
---|
| 1371 | else // other cases => cxy specified in vseg |
---|
| 1372 | { |
---|
| 1373 | page_cxy = vseg->cxy; |
---|
| 1374 | } |
---|
| 1375 | |
---|
| 1376 | // allocate a physical page from target cluster |
---|
| 1377 | if( page_cxy == local_cxy ) // target cluster is the local cluster |
---|
| 1378 | { |
---|
| 1379 | req.type = KMEM_PAGE; |
---|
| 1380 | req.size = 0; |
---|
| 1381 | req.flags = AF_NONE; |
---|
| 1382 | page_ptr = (page_t *)kmem_alloc( &req ); |
---|
| 1383 | } |
---|
| 1384 | else // target cluster is not the local cluster |
---|
| 1385 | { |
---|
| 1386 | rpc_pmem_get_pages_client( page_cxy , 0 , &page_ptr ); |
---|
| 1387 | } |
---|
| 1388 | |
---|
[438] | 1389 | #if DEBUG_VMM_ALLOCATE_PAGE |
---|
| 1390 | if( DEBUG_VMM_ALLOCATE_PAGE < (uint32_t)hal_get_cycles() ) |
---|
[433] | 1391 | printk("\n[DBG] in %s : thread %x exit for vpn = %d / ppn = %x\n", |
---|
| 1392 | __FUNCTION__ , CURRENT_THREAD, vpn, ppm_page2ppn( XPTR( page_cxy , page_ptr ) ) ); |
---|
| 1393 | #endif |
---|
| 1394 | |
---|
[407] | 1395 | if( page_ptr == NULL ) return XPTR_NULL; |
---|
| 1396 | else return XPTR( page_cxy , page_ptr ); |
---|
| 1397 | |
---|
| 1398 | } // end vmm_page_allocate() |
---|
| 1399 | |
---|
[313] | 1400 | //////////////////////////////////////// |
---|
| 1401 | error_t vmm_get_one_ppn( vseg_t * vseg, |
---|
| 1402 | vpn_t vpn, |
---|
| 1403 | ppn_t * ppn ) |
---|
| 1404 | { |
---|
| 1405 | error_t error; |
---|
[407] | 1406 | xptr_t page_xp; // extended pointer on physical page descriptor |
---|
[313] | 1407 | page_t * page_ptr; // local pointer on physical page descriptor |
---|
[406] | 1408 | uint32_t index; // missing page index in vseg mapper |
---|
| 1409 | uint32_t type; // vseg type; |
---|
[313] | 1410 | |
---|
[406] | 1411 | type = vseg->type; |
---|
| 1412 | index = vpn - vseg->vpn_base; |
---|
[313] | 1413 | |
---|
[438] | 1414 | #if DEBUG_VMM_GET_ONE_PPN |
---|
[441] | 1415 | thread_t * this = CURRENT_THREAD; |
---|
| 1416 | // if( DEBUG_VMM_GET_ONE_PPN < (uint32_t)hal_get_cycles() ) |
---|
| 1417 | if( (vpn == 0x403) && ((local_cxy == 0) || (this->type == THREAD_RPC)) ) |
---|
[433] | 1418 | printk("\n[DBG] %s : thread %x enter for vpn = %x / type = %s / index = %d\n", |
---|
[441] | 1419 | __FUNCTION__, this, vpn, vseg_type_str(type), index ); |
---|
[433] | 1420 | #endif |
---|
[313] | 1421 | |
---|
[406] | 1422 | // FILE type : get the physical page from the file mapper |
---|
[313] | 1423 | if( type == VSEG_TYPE_FILE ) |
---|
| 1424 | { |
---|
[406] | 1425 | // get extended pointer on mapper |
---|
[407] | 1426 | xptr_t mapper_xp = vseg->mapper_xp; |
---|
[313] | 1427 | |
---|
[406] | 1428 | assert( (mapper_xp != XPTR_NULL), __FUNCTION__, |
---|
| 1429 | "mapper not defined for a FILE vseg\n" ); |
---|
| 1430 | |
---|
| 1431 | // get mapper cluster and local pointer |
---|
| 1432 | cxy_t mapper_cxy = GET_CXY( mapper_xp ); |
---|
[433] | 1433 | mapper_t * mapper_ptr = GET_PTR( mapper_xp ); |
---|
[406] | 1434 | |
---|
[313] | 1435 | // get page descriptor from mapper |
---|
| 1436 | if( mapper_cxy == local_cxy ) // mapper is local |
---|
| 1437 | { |
---|
| 1438 | page_ptr = mapper_get_page( mapper_ptr , index ); |
---|
| 1439 | } |
---|
| 1440 | else // mapper is remote |
---|
| 1441 | { |
---|
| 1442 | rpc_mapper_get_page_client( mapper_cxy , mapper_ptr , index , &page_ptr ); |
---|
| 1443 | } |
---|
| 1444 | |
---|
| 1445 | if ( page_ptr == NULL ) return EINVAL; |
---|
| 1446 | |
---|
[407] | 1447 | page_xp = XPTR( mapper_cxy , page_ptr ); |
---|
[313] | 1448 | } |
---|
| 1449 | |
---|
[406] | 1450 | // Other types : allocate a physical page from target cluster, |
---|
[407] | 1451 | // as defined by vseg type and vpn value |
---|
[313] | 1452 | else |
---|
| 1453 | { |
---|
[433] | 1454 | // allocate one physical page |
---|
[407] | 1455 | page_xp = vmm_page_allocate( vseg , vpn ); |
---|
[406] | 1456 | |
---|
[407] | 1457 | if( page_xp == XPTR_NULL ) return ENOMEM; |
---|
[313] | 1458 | |
---|
[406] | 1459 | // initialise missing page from .elf file mapper for DATA and CODE types |
---|
[440] | 1460 | // the vseg->mapper_xp field is an extended pointer on the .elf file mapper |
---|
[313] | 1461 | if( (type == VSEG_TYPE_CODE) || (type == VSEG_TYPE_DATA) ) |
---|
| 1462 | { |
---|
[406] | 1463 | // get extended pointer on mapper |
---|
| 1464 | xptr_t mapper_xp = vseg->mapper_xp; |
---|
[313] | 1465 | |
---|
[406] | 1466 | assert( (mapper_xp != XPTR_NULL), __FUNCTION__, |
---|
| 1467 | "mapper not defined for a CODE or DATA vseg\n" ); |
---|
| 1468 | |
---|
| 1469 | // get mapper cluster and local pointer |
---|
| 1470 | cxy_t mapper_cxy = GET_CXY( mapper_xp ); |
---|
[433] | 1471 | mapper_t * mapper_ptr = GET_PTR( mapper_xp ); |
---|
[406] | 1472 | |
---|
| 1473 | // compute missing page offset in vseg |
---|
| 1474 | uint32_t offset = index << CONFIG_PPM_PAGE_SHIFT; |
---|
| 1475 | |
---|
[313] | 1476 | // compute missing page offset in .elf file |
---|
[406] | 1477 | uint32_t elf_offset = vseg->file_offset + offset; |
---|
[313] | 1478 | |
---|
[438] | 1479 | #if (DEBUG_VMM_GET_ONE_PPN & 0x1) |
---|
[441] | 1480 | if( (vpn == 0x403) && ((local_cxy == 0) || (this->type == THREAD_RPC)) ) |
---|
| 1481 | // if( DEBUG_VMM_GET_ONE_PPN < (uint32_t)hal_get_cycles() ) |
---|
[433] | 1482 | printk("\n[DBG] %s : thread %x for vpn = %x / elf_offset = %x\n", |
---|
[441] | 1483 | __FUNCTION__, this, vpn, elf_offset ); |
---|
[433] | 1484 | #endif |
---|
[313] | 1485 | |
---|
[440] | 1486 | |
---|
[406] | 1487 | // compute extended pointer on page base |
---|
[407] | 1488 | xptr_t base_xp = ppm_page2base( page_xp ); |
---|
[313] | 1489 | |
---|
[406] | 1490 | // file_size (in .elf mapper) can be smaller than vseg_size (BSS) |
---|
| 1491 | uint32_t file_size = vseg->file_size; |
---|
| 1492 | |
---|
| 1493 | if( file_size < offset ) // missing page fully in BSS |
---|
[313] | 1494 | { |
---|
[406] | 1495 | |
---|
[438] | 1496 | #if (DEBUG_VMM_GET_ONE_PPN & 0x1) |
---|
[441] | 1497 | // if( DEBUG_VMM_GET_ONE_PPN < (uint32_t)hal_get_cycles() ) |
---|
| 1498 | if( (vpn == 0x403) && ((local_cxy == 0) || (this->type == THREAD_RPC)) ) |
---|
[433] | 1499 | printk("\n[DBG] %s : thread%x for vpn = %x / fully in BSS\n", |
---|
[441] | 1500 | __FUNCTION__, this, vpn ); |
---|
[433] | 1501 | #endif |
---|
| 1502 | |
---|
[440] | 1503 | |
---|
[407] | 1504 | if( GET_CXY( page_xp ) == local_cxy ) |
---|
[313] | 1505 | { |
---|
[315] | 1506 | memset( GET_PTR( base_xp ) , 0 , CONFIG_PPM_PAGE_SIZE ); |
---|
[313] | 1507 | } |
---|
| 1508 | else |
---|
| 1509 | { |
---|
[315] | 1510 | hal_remote_memset( base_xp , 0 , CONFIG_PPM_PAGE_SIZE ); |
---|
[313] | 1511 | } |
---|
| 1512 | } |
---|
[406] | 1513 | else if( file_size >= (offset + CONFIG_PPM_PAGE_SIZE) ) // fully in mapper |
---|
[315] | 1514 | { |
---|
[406] | 1515 | |
---|
[438] | 1516 | #if (DEBUG_VMM_GET_ONE_PPN & 0x1) |
---|
[441] | 1517 | // if( DEBUG_VMM_GET_ONE_PPN < (uint32_t)hal_get_cycles() ) |
---|
| 1518 | if( (vpn == 0x403) && ((local_cxy == 0) || (this->type == THREAD_RPC)) ) |
---|
[433] | 1519 | printk("\n[DBG] %s : thread %x, for vpn = %x / fully in mapper\n", |
---|
[441] | 1520 | __FUNCTION__, this, vpn ); |
---|
[433] | 1521 | #endif |
---|
[313] | 1522 | if( mapper_cxy == local_cxy ) |
---|
| 1523 | { |
---|
| 1524 | error = mapper_move_kernel( mapper_ptr, |
---|
| 1525 | true, // to_buffer |
---|
[406] | 1526 | elf_offset, |
---|
[313] | 1527 | base_xp, |
---|
[315] | 1528 | CONFIG_PPM_PAGE_SIZE ); |
---|
[313] | 1529 | } |
---|
| 1530 | else |
---|
| 1531 | { |
---|
| 1532 | rpc_mapper_move_buffer_client( mapper_cxy, |
---|
| 1533 | mapper_ptr, |
---|
| 1534 | true, // to buffer |
---|
| 1535 | false, // kernel buffer |
---|
[406] | 1536 | elf_offset, |
---|
| 1537 | base_xp, |
---|
[315] | 1538 | CONFIG_PPM_PAGE_SIZE, |
---|
[313] | 1539 | &error ); |
---|
| 1540 | } |
---|
| 1541 | if( error ) return EINVAL; |
---|
| 1542 | } |
---|
[406] | 1543 | else // both in mapper and in BSS : |
---|
| 1544 | // - (file_size - offset) bytes from mapper |
---|
| 1545 | // - (page_size + offset - file_size) bytes from BSS |
---|
[313] | 1546 | { |
---|
[406] | 1547 | |
---|
[438] | 1548 | #if (DEBUG_VMM_GET_ONE_PPN & 0x1) |
---|
[441] | 1549 | // if( DEBUG_VMM_GET_ONE_PPN < (uint32_t)hal_get_cycles() ) |
---|
| 1550 | if( (vpn == 0x403) && ((local_cxy == 0) || (this->type == THREAD_RPC)) ) |
---|
[433] | 1551 | printk("\n[DBG] %s : thread %x for vpn = %x / both mapper & BSS\n" |
---|
| 1552 | " %d bytes from mapper / %d bytes from BSS\n", |
---|
[441] | 1553 | __FUNCTION__, this, vpn, |
---|
[407] | 1554 | file_size - offset , offset + CONFIG_PPM_PAGE_SIZE - file_size ); |
---|
[433] | 1555 | #endif |
---|
[313] | 1556 | // initialize mapper part |
---|
[315] | 1557 | if( mapper_cxy == local_cxy ) |
---|
[313] | 1558 | { |
---|
| 1559 | error = mapper_move_kernel( mapper_ptr, |
---|
[315] | 1560 | true, // to buffer |
---|
[406] | 1561 | elf_offset, |
---|
[313] | 1562 | base_xp, |
---|
[406] | 1563 | file_size - offset ); |
---|
[313] | 1564 | } |
---|
[315] | 1565 | else |
---|
[313] | 1566 | { |
---|
| 1567 | rpc_mapper_move_buffer_client( mapper_cxy, |
---|
| 1568 | mapper_ptr, |
---|
[315] | 1569 | true, // to buffer |
---|
[313] | 1570 | false, // kernel buffer |
---|
[406] | 1571 | elf_offset, |
---|
| 1572 | base_xp, |
---|
| 1573 | file_size - offset, |
---|
[313] | 1574 | &error ); |
---|
| 1575 | } |
---|
| 1576 | if( error ) return EINVAL; |
---|
| 1577 | |
---|
| 1578 | // initialize BSS part |
---|
[407] | 1579 | if( GET_CXY( page_xp ) == local_cxy ) |
---|
[313] | 1580 | { |
---|
[406] | 1581 | memset( GET_PTR( base_xp ) + file_size - offset , 0 , |
---|
| 1582 | offset + CONFIG_PPM_PAGE_SIZE - file_size ); |
---|
[313] | 1583 | } |
---|
| 1584 | else |
---|
| 1585 | { |
---|
[406] | 1586 | hal_remote_memset( base_xp + file_size - offset , 0 , |
---|
| 1587 | offset + CONFIG_PPM_PAGE_SIZE - file_size ); |
---|
[313] | 1588 | } |
---|
| 1589 | } |
---|
| 1590 | } // end initialisation for CODE or DATA types |
---|
| 1591 | } |
---|
| 1592 | |
---|
| 1593 | // return ppn |
---|
[407] | 1594 | *ppn = ppm_page2ppn( page_xp ); |
---|
[406] | 1595 | |
---|
[438] | 1596 | #if DEBUG_VMM_GET_ONE_PPN |
---|
[441] | 1597 | // if( DEBUG_VMM_GET_ONE_PPN < (uint32_t)hal_get_cycles() ) |
---|
| 1598 | if( (vpn == 0x403) && ((local_cxy == 0) || (this->type == THREAD_RPC)) ) |
---|
[433] | 1599 | printk("\n[DBG] %s : thread %x exit for vpn = %x / ppn = %x\n", |
---|
[441] | 1600 | __FUNCTION__ , this , vpn , *ppn ); |
---|
[433] | 1601 | #endif |
---|
[406] | 1602 | |
---|
[313] | 1603 | return 0; |
---|
| 1604 | |
---|
| 1605 | } // end vmm_get_one_ppn() |
---|
| 1606 | |
---|
[1] | 1607 | ///////////////////////////////////////// |
---|
| 1608 | error_t vmm_get_pte( process_t * process, |
---|
| 1609 | vpn_t vpn, |
---|
[407] | 1610 | bool_t cow, |
---|
| 1611 | uint32_t * attr, |
---|
| 1612 | ppn_t * ppn ) |
---|
[1] | 1613 | { |
---|
[440] | 1614 | ppn_t old_ppn; // current PTE_PPN |
---|
| 1615 | uint32_t old_attr; // current PTE_ATTR |
---|
| 1616 | ppn_t new_ppn; // new PTE_PPN |
---|
| 1617 | uint32_t new_attr; // new PTE_ATTR |
---|
| 1618 | vmm_t * vmm; |
---|
| 1619 | vseg_t * vseg; |
---|
| 1620 | error_t error; |
---|
[1] | 1621 | |
---|
[441] | 1622 | thread_t * this = CURRENT_THREAD; |
---|
| 1623 | |
---|
[438] | 1624 | #if DEBUG_VMM_GET_PTE |
---|
[441] | 1625 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
| 1626 | // if( DEBUG_VMM_GET_PTE < cycle ) |
---|
| 1627 | if( (vpn == 0x403) && ((local_cxy == 0) || (this->type == THREAD_RPC)) ) |
---|
[438] | 1628 | printk("\n[DBG] %s : thread %x enter / vpn %x / process %x / cow %d / cycle %d\n", |
---|
[441] | 1629 | __FUNCTION__ , this , vpn , process->pid , cow , cycle ); |
---|
[433] | 1630 | #endif |
---|
[406] | 1631 | |
---|
[1] | 1632 | // get VMM pointer |
---|
[440] | 1633 | vmm = &process->vmm; |
---|
[1] | 1634 | |
---|
[440] | 1635 | // get local vseg descriptor |
---|
| 1636 | error = vmm_get_vseg( process, |
---|
| 1637 | ((intptr_t)vpn << CONFIG_PPM_PAGE_SHIFT), |
---|
| 1638 | &vseg ); |
---|
[1] | 1639 | |
---|
[440] | 1640 | // vseg has been checked by the vmm_handle_page_fault() function |
---|
| 1641 | assert( (vseg != NULL) , __FUNCTION__, |
---|
| 1642 | "vseg undefined / vpn %x / thread %x / process %x / core[%x,%d] / cycle %d\n", |
---|
[441] | 1643 | vpn, this, process->pid, local_cxy, this->core->lid, |
---|
[440] | 1644 | (uint32_t)hal_get_cycles() ); |
---|
[406] | 1645 | |
---|
[438] | 1646 | if( cow ) //////////////// copy_on_write request ////////////////////// |
---|
[440] | 1647 | // get PTE from local GPT |
---|
[438] | 1648 | // allocate a new physical page if there is pending forks, |
---|
| 1649 | // initialize it from old physical page content, |
---|
| 1650 | // update PTE in all GPT copies, |
---|
| 1651 | { |
---|
[440] | 1652 | // access local GPT to get current PTE attributes and PPN |
---|
[438] | 1653 | hal_gpt_get_pte( &vmm->gpt , vpn , &old_attr , &old_ppn ); |
---|
[407] | 1654 | |
---|
[440] | 1655 | assert( (old_attr & GPT_MAPPED), __FUNCTION__, |
---|
| 1656 | "PTE unmapped for a COW exception / vpn %x / thread %x / process %x / cycle %d\n", |
---|
[441] | 1657 | vpn, this, process->pid, (uint32_t)hal_get_cycles() ); |
---|
[407] | 1658 | |
---|
[438] | 1659 | #if( DEBUG_VMM_GET_PTE & 1 ) |
---|
[441] | 1660 | // if( DEBUG_VMM_GET_PTE < cycle ) |
---|
| 1661 | if( (vpn == 0x403) && ((local_cxy == 0) || (this->type == THREAD_RPC)) ) |
---|
[433] | 1662 | printk("\n[DBG] %s : thread %x handling COW for vpn %x in process %x\n", |
---|
[441] | 1663 | __FUNCTION__, this, vpn, process->pid ); |
---|
[433] | 1664 | #endif |
---|
[407] | 1665 | |
---|
[433] | 1666 | // get extended pointer, cluster and local pointer on physical page descriptor |
---|
[408] | 1667 | xptr_t page_xp = ppm_ppn2page( old_ppn ); |
---|
| 1668 | cxy_t page_cxy = GET_CXY( page_xp ); |
---|
[433] | 1669 | page_t * page_ptr = GET_PTR( page_xp ); |
---|
[407] | 1670 | |
---|
[408] | 1671 | // get number of pending forks in page descriptor |
---|
[433] | 1672 | uint32_t forks = hal_remote_lw( XPTR( page_cxy , &page_ptr->forks ) ); |
---|
[408] | 1673 | |
---|
[433] | 1674 | if( forks ) // pending fork => allocate a new page, copy old to new |
---|
[1] | 1675 | { |
---|
[408] | 1676 | // allocate a new physical page |
---|
| 1677 | page_xp = vmm_page_allocate( vseg , vpn ); |
---|
| 1678 | if( page_xp == XPTR_NULL ) |
---|
| 1679 | { |
---|
| 1680 | printk("\n[ERROR] in %s : no memory / process = %x / vpn = %x\n", |
---|
| 1681 | __FUNCTION__ , process->pid , vpn ); |
---|
| 1682 | return -1; |
---|
| 1683 | } |
---|
[1] | 1684 | |
---|
[408] | 1685 | // compute allocated page PPN |
---|
| 1686 | new_ppn = ppm_page2ppn( page_xp ); |
---|
[406] | 1687 | |
---|
[408] | 1688 | // copy old page content to new page |
---|
| 1689 | xptr_t old_base_xp = ppm_ppn2base( old_ppn ); |
---|
| 1690 | xptr_t new_base_xp = ppm_ppn2base( new_ppn ); |
---|
| 1691 | memcpy( GET_PTR( new_base_xp ), |
---|
| 1692 | GET_PTR( old_base_xp ), |
---|
| 1693 | CONFIG_PPM_PAGE_SIZE ); |
---|
| 1694 | } |
---|
| 1695 | else // no pending fork => keep the existing page, reset COW |
---|
| 1696 | { |
---|
| 1697 | new_ppn = old_ppn; |
---|
| 1698 | } |
---|
[1] | 1699 | |
---|
[408] | 1700 | // build new_attr : reset COW and set WRITABLE, |
---|
| 1701 | new_attr = (old_attr | GPT_WRITABLE) & (~GPT_COW); |
---|
[407] | 1702 | |
---|
[408] | 1703 | // update GPT[vpn] for all GPT copies |
---|
[433] | 1704 | vmm_global_update_pte( process, vpn, new_attr, new_ppn ); |
---|
[407] | 1705 | |
---|
[433] | 1706 | // decrement pending forks counter in page descriptor |
---|
| 1707 | hal_remote_atomic_add( XPTR( page_cxy , &page_ptr->forks ) , -1 ); |
---|
[407] | 1708 | } |
---|
[438] | 1709 | else //////////// page_fault request /////////////////////////// |
---|
[440] | 1710 | // get PTE from local GPT |
---|
[438] | 1711 | // allocate a physical page if it is a true page fault, |
---|
[440] | 1712 | // initialize it if type is FILE, CODE, or DATA, |
---|
[438] | 1713 | // register in reference GPT, but don't update GPT copies |
---|
[407] | 1714 | { |
---|
[440] | 1715 | // access local GPT to get current PTE |
---|
[438] | 1716 | hal_gpt_get_pte( &vmm->gpt , vpn , &old_attr , &old_ppn ); |
---|
| 1717 | |
---|
[408] | 1718 | if( (old_attr & GPT_MAPPED) == 0 ) // true page_fault => map it |
---|
[407] | 1719 | { |
---|
[1] | 1720 | |
---|
[438] | 1721 | #if( DEBUG_VMM_GET_PTE & 1 ) |
---|
[441] | 1722 | // if( DEBUG_VMM_GET_PTE < cycle ) |
---|
| 1723 | if( (vpn == 0x403) && ((local_cxy == 0) || (this->type == THREAD_RPC)) ) |
---|
[433] | 1724 | printk("\n[DBG] %s : thread %x handling page fault for vpn %x in process %x\n", |
---|
[441] | 1725 | __FUNCTION__, this, vpn, process->pid ); |
---|
[433] | 1726 | #endif |
---|
[440] | 1727 | // allocate new_ppn, and initialize the new page |
---|
[407] | 1728 | error = vmm_get_one_ppn( vseg , vpn , &new_ppn ); |
---|
| 1729 | if( error ) |
---|
| 1730 | { |
---|
| 1731 | printk("\n[ERROR] in %s : no memory / process = %x / vpn = %x\n", |
---|
| 1732 | __FUNCTION__ , process->pid , vpn ); |
---|
[408] | 1733 | return -1; |
---|
[407] | 1734 | } |
---|
| 1735 | |
---|
[408] | 1736 | // define new_attr from vseg flags |
---|
[407] | 1737 | new_attr = GPT_MAPPED | GPT_SMALL; |
---|
| 1738 | if( vseg->flags & VSEG_USER ) new_attr |= GPT_USER; |
---|
| 1739 | if( vseg->flags & VSEG_WRITE ) new_attr |= GPT_WRITABLE; |
---|
| 1740 | if( vseg->flags & VSEG_EXEC ) new_attr |= GPT_EXECUTABLE; |
---|
| 1741 | if( vseg->flags & VSEG_CACHE ) new_attr |= GPT_CACHABLE; |
---|
| 1742 | |
---|
[408] | 1743 | // register new PTE in reference GPT |
---|
| 1744 | // on demand policy => no update of GPT copies |
---|
| 1745 | error = hal_gpt_set_pte( &vmm->gpt, |
---|
| 1746 | vpn, |
---|
| 1747 | new_attr, |
---|
| 1748 | new_ppn ); |
---|
[407] | 1749 | if( error ) |
---|
| 1750 | { |
---|
| 1751 | printk("\n[ERROR] in %s : cannot update GPT / process = %x / vpn = %x\n", |
---|
| 1752 | __FUNCTION__ , process->pid , vpn ); |
---|
[408] | 1753 | return -1; |
---|
[407] | 1754 | } |
---|
| 1755 | } |
---|
[408] | 1756 | else // mapped in reference GPT => get it |
---|
[1] | 1757 | { |
---|
[408] | 1758 | new_ppn = old_ppn; |
---|
[407] | 1759 | new_attr = old_attr; |
---|
[1] | 1760 | } |
---|
[407] | 1761 | } |
---|
[1] | 1762 | |
---|
[438] | 1763 | #if DEBUG_VMM_GET_PTE |
---|
[433] | 1764 | cycle = (uint32_t)hal_get_cycles(); |
---|
[441] | 1765 | // if( DEBUG_VMM_GET_PTE < cycle ) |
---|
| 1766 | if( (vpn == 0x403) && (local_cxy == 0) ) |
---|
[440] | 1767 | printk("\n[DBG] %s : thread %x exit / vpn %x in process %x / ppn %x / attr %x / cycle %d\n", |
---|
[441] | 1768 | __FUNCTION__, this, vpn, process->pid, new_ppn, new_attr, cycle ); |
---|
[433] | 1769 | #endif |
---|
[406] | 1770 | |
---|
[438] | 1771 | // return PPN and flags |
---|
[407] | 1772 | *ppn = new_ppn; |
---|
| 1773 | *attr = new_attr; |
---|
[1] | 1774 | return 0; |
---|
| 1775 | |
---|
[313] | 1776 | } // end vmm_get_pte() |
---|
| 1777 | |
---|
[1] | 1778 | /////////////////////////////////////////////////// |
---|
| 1779 | error_t vmm_handle_page_fault( process_t * process, |
---|
[440] | 1780 | vpn_t vpn, |
---|
| 1781 | bool_t is_cow ) |
---|
[1] | 1782 | { |
---|
| 1783 | uint32_t attr; // missing page attributes |
---|
[21] | 1784 | ppn_t ppn; // missing page PPN |
---|
[440] | 1785 | vseg_t * vseg; // vseg containing vpn |
---|
| 1786 | uint32_t type; // vseg type |
---|
| 1787 | cxy_t ref_cxy; // reference cluster for missing vpn |
---|
| 1788 | process_t * ref_ptr; // reference process for missing vpn |
---|
[407] | 1789 | error_t error; |
---|
[1] | 1790 | |
---|
[440] | 1791 | thread_t * this = CURRENT_THREAD; |
---|
| 1792 | |
---|
| 1793 | #if DEBUG_VMM_HANDLE_PAGE_FAULT |
---|
[435] | 1794 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[441] | 1795 | // if( DEBUG_VMM_HANDLE_PAGE_FAULT < cycle ) |
---|
| 1796 | if( (vpn == 0x403) && (local_cxy == 0) ) |
---|
| 1797 | printk("\n[DBG] %s : thread %x in process %x enter for vpn %x / core[%x,%d] / cycle %d\n", |
---|
| 1798 | __FUNCTION__, this, process->pid, vpn, local_cxy, this->core->lid, cycle ); |
---|
[435] | 1799 | #endif |
---|
| 1800 | |
---|
[440] | 1801 | // get local vseg (access reference VSL if required) |
---|
| 1802 | error = vmm_get_vseg( process , vpn<<CONFIG_PPM_PAGE_SHIFT , &vseg ); |
---|
[1] | 1803 | |
---|
[440] | 1804 | if( error ) |
---|
[1] | 1805 | { |
---|
[440] | 1806 | printk("\n[ERROR] in %s : vpn %x / process %x / thread %x / core[%x,%d] / cycle %d\n", |
---|
| 1807 | __FUNCTION__, vpn, process->pid, this->trdid, local_cxy, this->core->lid, |
---|
| 1808 | (uint32_t)hal_get_cycles() ); |
---|
| 1809 | return error; |
---|
| 1810 | } |
---|
[407] | 1811 | |
---|
[440] | 1812 | // get segment type |
---|
| 1813 | type = vseg->type; |
---|
[407] | 1814 | |
---|
[440] | 1815 | // get reference process cluster and local pointer |
---|
| 1816 | // for private vsegs (CODE and DATA type), |
---|
| 1817 | // the reference is the local process descriptor. |
---|
| 1818 | if( (type == VSEG_TYPE_STACK) || (type == VSEG_TYPE_CODE) ) |
---|
| 1819 | { |
---|
| 1820 | ref_cxy = local_cxy; |
---|
| 1821 | ref_ptr = process; |
---|
[1] | 1822 | } |
---|
[440] | 1823 | else |
---|
[1] | 1824 | { |
---|
[440] | 1825 | ref_cxy = GET_CXY( process->ref_xp ); |
---|
| 1826 | ref_ptr = GET_PTR( process->ref_xp ); |
---|
[1] | 1827 | } |
---|
| 1828 | |
---|
[440] | 1829 | // get missing PTE attributes and PPN |
---|
| 1830 | if( local_cxy != ref_cxy ) |
---|
[407] | 1831 | { |
---|
[441] | 1832 | |
---|
| 1833 | #if DEBUG_VMM_HANDLE_PAGE_FAULT |
---|
| 1834 | // if( DEBUG_VMM_HANDLE_PAGE_FAULT < cycle ) |
---|
| 1835 | if( (vpn == 0x403) && (local_cxy == 0) ) |
---|
| 1836 | printk("\n[DBG] %s : thread %x in process %x call RPC_VMM_GET_PTE\n", |
---|
| 1837 | __FUNCTION__, this, process->pid ); |
---|
| 1838 | #endif |
---|
| 1839 | |
---|
[407] | 1840 | rpc_vmm_get_pte_client( ref_cxy, |
---|
| 1841 | ref_ptr, |
---|
| 1842 | vpn, |
---|
[440] | 1843 | is_cow, |
---|
[407] | 1844 | &attr, |
---|
| 1845 | &ppn, |
---|
| 1846 | &error ); |
---|
| 1847 | |
---|
| 1848 | // get local VMM pointer |
---|
| 1849 | vmm_t * vmm = &process->vmm; |
---|
| 1850 | |
---|
| 1851 | // update local GPT |
---|
[408] | 1852 | error |= hal_gpt_set_pte( &vmm->gpt, |
---|
| 1853 | vpn, |
---|
| 1854 | attr, |
---|
| 1855 | ppn ); |
---|
[407] | 1856 | } |
---|
| 1857 | else // local cluster is the reference cluster |
---|
| 1858 | { |
---|
| 1859 | error = vmm_get_pte( process, |
---|
| 1860 | vpn, |
---|
[440] | 1861 | is_cow, |
---|
[407] | 1862 | &attr, |
---|
| 1863 | &ppn ); |
---|
| 1864 | } |
---|
| 1865 | |
---|
[440] | 1866 | #if DEBUG_VMM_HANDLE_PAGE_FAULT |
---|
[435] | 1867 | cycle = (uint32_t)hal_get_cycles(); |
---|
[441] | 1868 | // if( DEBUG_VMM_HANDLE_PAGE_FAULT < cycle ) |
---|
| 1869 | if( (vpn == 0x403) && (local_cxy == 0) ) |
---|
| 1870 | printk("\n[DBG] %s : thread %x in process %x exit for vpn %x / core[%x,%d] / cycle %d\n", |
---|
| 1871 | __FUNCTION__, this, process->pid, vpn, local_cxy, this->core->lid, cycle ); |
---|
[435] | 1872 | #endif |
---|
| 1873 | |
---|
[407] | 1874 | return error; |
---|
| 1875 | |
---|
[441] | 1876 | } // end vmm_handle_page_fault() |
---|
[407] | 1877 | |
---|
[441] | 1878 | |
---|
| 1879 | |
---|
| 1880 | |
---|
| 1881 | |
---|
| 1882 | |
---|
| 1883 | |
---|
| 1884 | |
---|
| 1885 | |
---|
[440] | 1886 | /* deprecated April 2018 [AG] |
---|
| 1887 | |
---|
| 1888 | error_t vmm_v2p_translate( process_t * process, |
---|
| 1889 | void * ptr, |
---|
| 1890 | paddr_t * paddr ) |
---|
[1] | 1891 | { |
---|
[21] | 1892 | // access page table |
---|
[1] | 1893 | error_t error; |
---|
| 1894 | vpn_t vpn; |
---|
| 1895 | uint32_t attr; |
---|
| 1896 | ppn_t ppn; |
---|
| 1897 | uint32_t offset; |
---|
| 1898 | |
---|
[23] | 1899 | vpn = (vpn_t)( (intptr_t)ptr >> CONFIG_PPM_PAGE_SHIFT ); |
---|
| 1900 | offset = (uint32_t)( ((intptr_t)ptr) & CONFIG_PPM_PAGE_MASK ); |
---|
[1] | 1901 | |
---|
[440] | 1902 | if( local_cxy == GET_CXY( process->ref_xp) ) // local process is reference process |
---|
[1] | 1903 | { |
---|
[407] | 1904 | error = vmm_get_pte( process, vpn , false , &attr , &ppn ); |
---|
[1] | 1905 | } |
---|
[50] | 1906 | else // calling process is not reference process |
---|
[1] | 1907 | { |
---|
| 1908 | cxy_t ref_cxy = GET_CXY( process->ref_xp ); |
---|
[433] | 1909 | process_t * ref_ptr = GET_PTR( process->ref_xp ); |
---|
[407] | 1910 | rpc_vmm_get_pte_client( ref_cxy , ref_ptr , vpn , false , &attr , &ppn , &error ); |
---|
[1] | 1911 | } |
---|
| 1912 | |
---|
[23] | 1913 | // set paddr |
---|
[1] | 1914 | *paddr = (((paddr_t)ppn) << CONFIG_PPM_PAGE_SHIFT) | offset; |
---|
[21] | 1915 | |
---|
[23] | 1916 | return error; |
---|
[313] | 1917 | |
---|
[315] | 1918 | } // end vmm_v2p_translate() |
---|
[1] | 1919 | |
---|
[440] | 1920 | */ |
---|