X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvm_guest_mem.c;h=c88ecd2ab912026f837a5ded0813fced0cccecd3;hb=52bcd30a848d41e4ad84b237f3f6bec2600da3a9;hp=105322e6301406fcbb826533aaf91568b01cf50a;hpb=d4073a9dbe24ae160b8d6bd8fd5fd4ad8aa995a3;p=palacios.git diff --git a/palacios/src/palacios/vm_guest_mem.c b/palacios/src/palacios/vm_guest_mem.c index 105322e..c88ecd2 100644 --- a/palacios/src/palacios/vm_guest_mem.c +++ b/palacios/src/palacios/vm_guest_mem.c @@ -1,8 +1,27 @@ +/* + * This file is part of the Palacios Virtual Machine Monitor developed + * by the V3VEE Project with funding from the United States National + * Science Foundation and the Department of Energy. + * + * The V3VEE Project is a joint project between Northwestern University + * and the University of New Mexico. You can find out more at + * http://www.v3vee.org + * + * Copyright (c) 2008, Jack Lange + * Copyright (c) 2008, The V3VEE Project + * All rights reserved. + * + * Author: Jack Lange + * + * This is free software. You are permitted to use, + * redistribute, and modify it as specified in the file "V3VEE_LICENSE". + */ + #include #include #include -extern struct vmm_os_hooks * os_hooks; +extern struct v3_os_hooks * os_hooks; /**********************************/ @@ -10,48 +29,61 @@ extern struct vmm_os_hooks * os_hooks; /**********************************/ int host_va_to_host_pa(addr_t host_va, addr_t * host_pa) { - if ((os_hooks) && (os_hooks)->vaddr_to_paddr) { + if ((os_hooks) && (os_hooks)->vaddr_to_paddr) { - *host_pa = (addr_t)(os_hooks)->vaddr_to_paddr((void *)host_va); + *host_pa = (addr_t)(os_hooks)->vaddr_to_paddr((void *)host_va); - if (*host_pa == 0) { - PrintDebug("In HVA->HPA: Invalid HVA(%x)->HPA lookup\n", host_va); - return -1; + if (*host_pa == 0) { + PrintError("In HVA->HPA: Invalid HVA(%p)->HPA lookup\n", + (void *)host_va); + return -1; + } + } else { + PrintError("In HVA->HPA: os_hooks not defined\n"); + return -1; } - } else { - PrintDebug("In HVA->HPA: os_hooks not defined\n"); - return -1; - } - return 0; + return 0; } int host_pa_to_host_va(addr_t host_pa, addr_t * host_va) { - if ((os_hooks) && (os_hooks)->paddr_to_vaddr) { + if ((os_hooks) && (os_hooks)->paddr_to_vaddr) { - *host_va = (addr_t)(os_hooks)->paddr_to_vaddr((void *)host_pa); + *host_va = (addr_t)(os_hooks)->paddr_to_vaddr((void *)host_pa); - if (*host_va == 0) { - PrintDebug("In HPA->HVA: Invalid HPA(%x)->HVA lookup\n", host_pa); - return -1; + if (*host_va == 0) { + PrintError("In HPA->HVA: Invalid HPA(%p)->HVA lookup\n", + (void *)host_pa); + return -1; + } + } else { + PrintError("In HPA->HVA: os_hooks not defined\n"); + return -1; } - } else { - PrintDebug("In HPA->HVA: os_hooks not defined\n"); - return -1; - } - return 0; + return 0; } int guest_pa_to_host_pa(struct guest_info * guest_info, addr_t guest_pa, addr_t * host_pa) { - // we use the shadow map here... - if (lookup_shadow_map_addr(&(guest_info->mem_map), guest_pa, host_pa) != HOST_REGION_PHYSICAL_MEMORY) { - PrintDebug("In GPA->HPA: Could not find address in shadow map (addr=%x)\n", guest_pa); - return -1; - } + struct v3_shadow_region * shdw_reg = v3_get_shadow_region(guest_info, guest_pa); + + if (shdw_reg == NULL) { + PrintError("In GPA->HPA: Could not find address in shadow map (addr=%p) (NULL REGION)\n", + (void *)guest_pa); + return -1; + } + + if ((shdw_reg->host_type == SHDW_REGION_INVALID) || + (shdw_reg->host_type == SHDW_REGION_FULL_HOOK)) { + PrintError("In GPA->HPA: Could not find address in shadow map (addr=%p) (reg_type=%s)\n", + (void *)guest_pa, v3_shdw_region_type_to_str(shdw_reg->host_type)); + return -1; + } + + *host_pa = v3_get_shadow_addr(shdw_reg, guest_pa); - return 0; + return 0; } @@ -60,10 +92,10 @@ int guest_pa_to_host_pa(struct guest_info * guest_info, addr_t guest_pa, addr_t // For now we ignore it // int host_pa_to_guest_pa(struct guest_info * guest_info, addr_t host_pa, addr_t * guest_pa) { - *guest_pa = 0; - PrintDebug("ERROR!!! HPA->GPA currently not implemented!!!\n"); + *guest_pa = 0; + PrintError("ERROR!!! HPA->GPA currently not implemented!!!\n"); - return -1; + return -1; } @@ -76,120 +108,94 @@ int host_pa_to_guest_pa(struct guest_info * guest_info, addr_t host_pa, addr_t * /* !! Currently not implemented !! */ // This will return negative until we implement host_pa_to_guest_pa() int host_va_to_guest_pa(struct guest_info * guest_info, addr_t host_va, addr_t * guest_pa) { - addr_t host_pa = 0; - *guest_pa = 0; + addr_t host_pa = 0; + *guest_pa = 0; - if (host_va_to_host_pa(host_va, &host_pa) != 0) { - PrintDebug("In HVA->GPA: Invalid HVA(%x)->HPA lookup\n", host_va); - return -1; - } + if (host_va_to_host_pa(host_va, &host_pa) != 0) { + PrintError("In HVA->GPA: Invalid HVA(%p)->HPA lookup\n", + (void *)host_va); + return -1; + } - if (host_pa_to_guest_pa(guest_info, host_pa, guest_pa) != 0) { - PrintDebug("In HVA->GPA: Invalid HPA(%x)->GPA lookup\n", host_pa); - return -1; - } + if (host_pa_to_guest_pa(guest_info, host_pa, guest_pa) != 0) { + PrintError("In HVA->GPA: Invalid HPA(%p)->GPA lookup\n", + (void *)host_pa); + return -1; + } - return 0; + return 0; } int guest_pa_to_host_va(struct guest_info * guest_info, addr_t guest_pa, addr_t * host_va) { - addr_t host_pa = 0; + addr_t host_pa = 0; - *host_va = 0; + *host_va = 0; - if (guest_pa_to_host_pa(guest_info, guest_pa, &host_pa) != 0) { - PrintDebug("In GPA->HVA: Invalid GPA(%x)->HPA lookup\n", guest_pa); - return -1; - } + if (guest_pa_to_host_pa(guest_info, guest_pa, &host_pa) != 0) { + PrintError("In GPA->HVA: Invalid GPA(%p)->HPA lookup\n", + (void *)guest_pa); + return -1; + } - if (host_pa_to_host_va(host_pa, host_va) != 0) { - PrintDebug("In GPA->HVA: Invalid HPA(%x)->HVA lookup\n", host_pa); - return -1; - } + if (host_pa_to_host_va(host_pa, host_va) != 0) { + PrintError("In GPA->HVA: Invalid HPA(%p)->HVA lookup\n", + (void *)host_pa); + return -1; + } - return 0; + return 0; } int guest_va_to_guest_pa(struct guest_info * guest_info, addr_t guest_va, addr_t * guest_pa) { - if (guest_info->mem_mode == PHYSICAL_MEM) { - // guest virtual address is the same as the physical - *guest_pa = guest_va; - return 0; - } - - - if (guest_info->shdw_pg_mode == SHADOW_PAGING) { - // Guest Is in Paged mode - switch (guest_info->cpu_mode) { - case PROTECTED: - { - addr_t tmp_pa = 0; - pde32_t * pde = 0; - addr_t guest_pde = CR3_TO_PDE32(guest_info->shdw_pg_state.guest_cr3); - - - if (guest_pa_to_host_va(guest_info, guest_pde, (addr_t *)&pde) == -1) { - PrintDebug("In GVA->GPA: Invalid GPA(%x)->HVA PDE32 lookup\n", guest_pde); - return -1; - } + v3_reg_t guest_cr3 = 0; + if (guest_info->mem_mode == PHYSICAL_MEM) { + // guest virtual address is the same as the physical + *guest_pa = guest_va; + return 0; + } - switch (pde32_lookup(pde, guest_va, &tmp_pa)) { - case PDE32_ENTRY_NOT_PRESENT: - *guest_pa = 0; - return -1; - case PDE32_ENTRY_LARGE_PAGE: - *guest_pa = tmp_pa; - return 0; - case PDE32_ENTRY_PTE32: - { - pte32_t * pte = 0; + if (guest_info->shdw_pg_mode == SHADOW_PAGING) { + guest_cr3 = guest_info->shdw_pg_state.guest_cr3; + } else { + guest_cr3 = guest_info->ctrl_regs.cr3; + } - if (guest_pa_to_host_va(guest_info, tmp_pa, (addr_t*)&pte) == -1) { - PrintDebug("In GVA->GPA: Invalid GPA(%x)->HVA PTE32 lookup\n", guest_pa); - return -1; + // Guest Is in Paged mode + switch (guest_info->cpu_mode) { + case PROTECTED: + if (v3_translate_guest_pt_32(guest_info, guest_cr3, guest_va, guest_pa) == -1) { + PrintDebug("Could not translate addr (%p) through 32 bit guest PT at %p\n", + (void *)guest_va, (void *)(addr_t)guest_cr3); + return -1; } - - PrintDebug("PTE host addr=%x, GVA=%x, GPA=%x(should be 0)\n", pte, guest_va, *guest_pa); - - if (pte32_lookup(pte, guest_va, guest_pa) != 0) { - PrintDebug("In GVA->GPA: PTE32 Lookup failure GVA=%x; PTE=%x\n", guest_va, pte); - // PrintPT32(PDE32_INDEX(guest_va) << 22, pte); - return -1; + break; + case PROTECTED_PAE: + if (v3_translate_guest_pt_32pae(guest_info, guest_cr3, guest_va, guest_pa) == -1) { + PrintDebug("Could not translate addr (%p) through 32 bitpae guest PT at %p\n", + (void *)guest_va, (void *)(addr_t)guest_cr3); + return -1; } - - return 0; - } + break; + case LONG: + case LONG_32_COMPAT: + case LONG_16_COMPAT: + if (v3_translate_guest_pt_64(guest_info, guest_cr3, guest_va, guest_pa) == -1) { + PrintDebug("Could not translate addr (%p) through 64 bit guest PT at %p\n", + (void *)guest_va, (void *)(addr_t)guest_cr3); + return -1; + } + break; default: - return -1; - } - } - case PROTECTED_PAE: - { - // Fill in - } - case LONG: - { - // Fill in - } - default: - return -1; + return -1; } - } else if (guest_info->shdw_pg_mode == NESTED_PAGING) { - - // Fill in - return -1; - } else { - return -1; - } - - - return 0; + + return 0; } @@ -200,9 +206,9 @@ int guest_va_to_guest_pa(struct guest_info * guest_info, addr_t guest_va, addr_t * For now we ignore it... */ int guest_pa_to_guest_va(struct guest_info * guest_info, addr_t guest_pa, addr_t * guest_va) { - *guest_va = 0; - PrintDebug("ERROR!!: GPA->GVA Not Implemented!!\n"); - return -1; + *guest_va = 0; + PrintError("ERROR!!: GPA->GVA Not Implemented!!\n"); + return -1; } @@ -212,93 +218,103 @@ int guest_pa_to_guest_va(struct guest_info * guest_info, addr_t guest_pa, addr_t int guest_va_to_host_pa(struct guest_info * guest_info, addr_t guest_va, addr_t * host_pa) { - addr_t guest_pa = 0; + addr_t guest_pa = 0; - *host_pa = 0; + *host_pa = 0; - if (guest_va_to_guest_pa(guest_info, guest_va, &guest_pa) != 0) { - PrintDebug("In GVA->HPA: Invalid GVA(%x)->GPA lookup\n", guest_va); - return -1; - } + if (guest_va_to_guest_pa(guest_info, guest_va, &guest_pa) != 0) { + PrintError("In GVA->HPA: Invalid GVA(%p)->GPA lookup\n", + (void *)guest_va); + return -1; + } - if (guest_pa_to_host_pa(guest_info, guest_pa, host_pa) != 0) { - PrintDebug("In GVA->HPA: Invalid GPA(%x)->HPA lookup\n", guest_pa); - return -1; - } + if (guest_pa_to_host_pa(guest_info, guest_pa, host_pa) != 0) { + PrintError("In GVA->HPA: Invalid GPA(%p)->HPA lookup\n", + (void *)guest_pa); + return -1; + } - return 0; + return 0; } /* !! Currently not implemented !! */ int host_pa_to_guest_va(struct guest_info * guest_info, addr_t host_pa, addr_t * guest_va) { - addr_t guest_pa = 0; + addr_t guest_pa = 0; - *guest_va = 0; + *guest_va = 0; - if (host_pa_to_guest_pa(guest_info, host_pa, &guest_pa) != 0) { - PrintDebug("In HPA->GVA: Invalid HPA(%x)->GPA lookup\n", host_pa); - return -1; - } + if (host_pa_to_guest_pa(guest_info, host_pa, &guest_pa) != 0) { + PrintError("In HPA->GVA: Invalid HPA(%p)->GPA lookup\n", + (void *)host_pa); + return -1; + } - if (guest_pa_to_guest_va(guest_info, guest_pa, guest_va) != 0) { - PrintDebug("In HPA->GVA: Invalid GPA(%x)->GVA lookup\n", guest_pa); - return -1; - } + if (guest_pa_to_guest_va(guest_info, guest_pa, guest_va) != 0) { + PrintError("In HPA->GVA: Invalid GPA(%p)->GVA lookup\n", + (void *)guest_pa); + return -1; + } - return 0; + return 0; } int guest_va_to_host_va(struct guest_info * guest_info, addr_t guest_va, addr_t * host_va) { - addr_t guest_pa = 0; - addr_t host_pa = 0; + addr_t guest_pa = 0; + addr_t host_pa = 0; - *host_va = 0; + *host_va = 0; - if (guest_va_to_guest_pa(guest_info, guest_va, &guest_pa) != 0) { - PrintDebug("In GVA->HVA: Invalid GVA(%x)->GPA lookup\n", guest_va); - return -1; - } + if (guest_va_to_guest_pa(guest_info, guest_va, &guest_pa) != 0) { + PrintError("In GVA->HVA: Invalid GVA(%p)->GPA lookup\n", + (void *)guest_va); + return -1; + } - if (guest_pa_to_host_pa(guest_info, guest_pa, &host_pa) != 0) { - PrintDebug("In GVA->HVA: Invalid GPA(%x)->HPA lookup\n", guest_pa); - return -1; - } + if (guest_pa_to_host_pa(guest_info, guest_pa, &host_pa) != 0) { + PrintError("In GVA->HVA: Invalid GPA(%p)->HPA lookup\n", + (void *)guest_pa); + return -1; + } - if (host_pa_to_host_va(host_pa, host_va) != 0) { - PrintDebug("In GVA->HVA: Invalid HPA(%x)->HVA lookup\n", host_pa); - return -1; - } + if (host_pa_to_host_va(host_pa, host_va) != 0) { + PrintError("In GVA->HVA: Invalid HPA(%p)->HVA lookup\n", + (void *)host_pa); + return -1; + } - return 0; + return 0; } /* !! Currently not implemented !! */ int host_va_to_guest_va(struct guest_info * guest_info, addr_t host_va, addr_t * guest_va) { - addr_t host_pa = 0; - addr_t guest_pa = 0; + addr_t host_pa = 0; + addr_t guest_pa = 0; - *guest_va = 0; + *guest_va = 0; - if (host_va_to_host_pa(host_va, &host_pa) != 0) { - PrintDebug("In HVA->GVA: Invalid HVA(%x)->HPA lookup\n", host_va); - return -1; - } + if (host_va_to_host_pa(host_va, &host_pa) != 0) { + PrintError("In HVA->GVA: Invalid HVA(%p)->HPA lookup\n", + (void *)host_va); + return -1; + } - if (host_pa_to_guest_pa(guest_info, host_pa, &guest_pa) != 0) { - PrintDebug("In HVA->GVA: Invalid HPA(%x)->GPA lookup\n", host_va); - return -1; - } + if (host_pa_to_guest_pa(guest_info, host_pa, &guest_pa) != 0) { + PrintError("In HVA->GVA: Invalid HPA(%p)->GPA lookup\n", + (void *)host_va); + return -1; + } - if (guest_pa_to_guest_va(guest_info, guest_pa, guest_va) != 0) { - PrintDebug("In HVA->GVA: Invalid GPA(%x)->GVA lookup\n", guest_pa); - return -1; - } + if (guest_pa_to_guest_va(guest_info, guest_pa, guest_va) != 0) { + PrintError("In HVA->GVA: Invalid GPA(%p)->GVA lookup\n", + (void *)guest_pa); + return -1; + } - return 0; + return 0; } @@ -309,63 +325,33 @@ int host_va_to_guest_va(struct guest_info * guest_info, addr_t host_va, addr_t * /* This is a straight address conversion + copy, * except for the tiny little issue of crossing page boundries..... */ -int read_guest_va_memory(struct guest_info * guest_info, addr_t guest_va, int count, char * dest) { - addr_t cursor = guest_va; - int bytes_read = 0; - - +int read_guest_va_memory(struct guest_info * guest_info, addr_t guest_va, int count, uchar_t * dest) { + addr_t cursor = guest_va; + int bytes_read = 0; - while (count > 0) { - int dist_to_pg_edge = (PAGE_ADDR(cursor) + PAGE_SIZE) - cursor; - int bytes_to_copy = (dist_to_pg_edge > count) ? count : dist_to_pg_edge; - addr_t host_addr = 0; + while (count > 0) { + int dist_to_pg_edge = (PAGE_ADDR(cursor) + PAGE_SIZE) - cursor; + int bytes_to_copy = (dist_to_pg_edge > count) ? count : dist_to_pg_edge; + addr_t host_addr = 0; - /* JRL FIXME: - * This should be somewhere else.... - */ - /* - addr_t tmp_addr; - - addr_t shadow_pde = CR3_TO_PDE32(guest_info->shdw_pg_state.shadow_cr3); - - // Check the Shadow Page Tables first (Virtual TLB) - if (pt32_lookup((pde32_t *)shadow_pde, cursor, &tmp_addr) == 0) { - host_addr = tmp_addr; - - if (host_pa_to_host_va(tmp_addr, &host_addr) != 0) { - return bytes_read; - } - } else { - // No entry in the VTLB, do a guest page table walk - - if (guest_va_to_host_va(guest_info, cursor, &host_addr) != 0) { - PrintDebug("Invalid GVA(%x)->HVA lookup\n", cursor); - return bytes_read; - } - } -*/ - /* JRL: END GRUESOME HACK */ - - - - if (guest_va_to_host_va(guest_info, cursor, &host_addr) != 0) { - PrintDebug("Invalid GVA(%x)->HVA lookup\n", cursor); - return bytes_read; - } + if (guest_va_to_host_va(guest_info, cursor, &host_addr) != 0) { + PrintDebug("Invalid GVA(%p)->HVA lookup\n", (void *)cursor); + return bytes_read; + } - memcpy(dest + bytes_read, (void*)host_addr, bytes_to_copy); + memcpy(dest + bytes_read, (void*)host_addr, bytes_to_copy); - bytes_read += bytes_to_copy; - count -= bytes_to_copy; - cursor += bytes_to_copy; - } + bytes_read += bytes_to_copy; + count -= bytes_to_copy; + cursor += bytes_to_copy; + } - return bytes_read; + return bytes_read; } @@ -376,34 +362,34 @@ int read_guest_va_memory(struct guest_info * guest_info, addr_t guest_va, int co /* This is a straight address conversion + copy, * except for the tiny little issue of crossing page boundries..... */ -int read_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, char * dest) { - addr_t cursor = guest_pa; - int bytes_read = 0; - - while (count > 0) { - int dist_to_pg_edge = (PAGE_ADDR(cursor) + PAGE_SIZE) - cursor; - int bytes_to_copy = (dist_to_pg_edge > count) ? count : dist_to_pg_edge; - addr_t host_addr = 0; - - if (guest_pa_to_host_va(guest_info, cursor, &host_addr) != 0) { - return bytes_read; - } +int read_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, uchar_t * dest) { + addr_t cursor = guest_pa; + int bytes_read = 0; + + while (count > 0) { + int dist_to_pg_edge = (PAGE_ADDR(cursor) + PAGE_SIZE) - cursor; + int bytes_to_copy = (dist_to_pg_edge > count) ? count : dist_to_pg_edge; + addr_t host_addr = 0; + + if (guest_pa_to_host_va(guest_info, cursor, &host_addr) != 0) { + return bytes_read; + } - /* - PrintDebug("Trying to read %d bytes\n", bytes_to_copy); - PrintDebug("Dist to page edge=%d\n", dist_to_pg_edge); - PrintDebug("PAGE_ADDR=0x%x\n", PAGE_ADDR(cursor)); - PrintDebug("guest_pa=0x%x\n", guest_pa); - */ + /* + PrintDebug("Trying to read %d bytes\n", bytes_to_copy); + PrintDebug("Dist to page edge=%d\n", dist_to_pg_edge); + PrintDebug("PAGE_ADDR=0x%x\n", PAGE_ADDR(cursor)); + PrintDebug("guest_pa=0x%x\n", guest_pa); + */ - memcpy(dest + bytes_read, (void*)host_addr, bytes_to_copy); + memcpy(dest + bytes_read, (void*)host_addr, bytes_to_copy); - bytes_read += bytes_to_copy; - count -= bytes_to_copy; - cursor += bytes_to_copy; - } + bytes_read += bytes_to_copy; + count -= bytes_to_copy; + cursor += bytes_to_copy; + } - return bytes_read; + return bytes_read; } @@ -412,27 +398,27 @@ int read_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int co /* This is a straight address conversion + copy, * except for the tiny little issue of crossing page boundries..... */ -int write_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, char * src) { - addr_t cursor = guest_pa; - int bytes_written = 0; +int write_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, uchar_t * src) { + addr_t cursor = guest_pa; + int bytes_written = 0; - while (count > 0) { - int dist_to_pg_edge = (PAGE_ADDR(cursor) + PAGE_SIZE) - cursor; - int bytes_to_copy = (dist_to_pg_edge > count) ? count : dist_to_pg_edge; - addr_t host_addr; + while (count > 0) { + int dist_to_pg_edge = (PAGE_ADDR(cursor) + PAGE_SIZE) - cursor; + int bytes_to_copy = (dist_to_pg_edge > count) ? count : dist_to_pg_edge; + addr_t host_addr; - if (guest_pa_to_host_va(guest_info, cursor, &host_addr) != 0) { - return bytes_written; - } + if (guest_pa_to_host_va(guest_info, cursor, &host_addr) != 0) { + return bytes_written; + } - memcpy((void*)host_addr, src + bytes_written, bytes_to_copy); + memcpy((void*)host_addr, src + bytes_written, bytes_to_copy); - bytes_written += bytes_to_copy; - count -= bytes_to_copy; - cursor += bytes_to_copy; - } + bytes_written += bytes_to_copy; + count -= bytes_to_copy; + cursor += bytes_to_copy; + } - return bytes_written; + return bytes_written; }