X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvm_guest_mem.c;h=51393d61c97d6c4791f9ebe69476006b313f7b6c;hb=a2b7cc4f2d739213d1edefb85ff941c41c86907b;hp=33cb5b2a398df8734be45bd92d7389f1ce045385;hpb=a109eb919a162bd7de58d62020801bc2e633be50;p=palacios.git diff --git a/palacios/src/palacios/vm_guest_mem.c b/palacios/src/palacios/vm_guest_mem.c index 33cb5b2..51393d6 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; /**********************************/ @@ -15,9 +34,11 @@ int host_va_to_host_pa(addr_t host_va, addr_t * host_pa) { *host_pa = (addr_t)(os_hooks)->vaddr_to_paddr((void *)host_va); if (*host_pa == 0) { + PrintError("In HVA->HPA: Invalid HVA(%x)->HPA lookup\n", host_va); return -1; } } else { + PrintError("In HVA->HPA: os_hooks not defined\n"); return -1; } return 0; @@ -30,9 +51,11 @@ int host_pa_to_host_va(addr_t host_pa, addr_t * host_va) { *host_va = (addr_t)(os_hooks)->paddr_to_vaddr((void *)host_pa); if (*host_va == 0) { + PrintError("In HPA->HVA: Invalid HPA(%x)->HVA lookup\n", host_pa); return -1; } } else { + PrintError("In HPA->HVA: os_hooks not defined\n"); return -1; } return 0; @@ -43,6 +66,7 @@ int host_pa_to_host_va(addr_t host_pa, addr_t * host_va) { 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) { + PrintError("In GPA->HPA: Could not find address in shadow map (addr=%x)\n", guest_pa); return -1; } @@ -56,6 +80,7 @@ int guest_pa_to_host_pa(struct guest_info * guest_info, addr_t guest_pa, addr_t // int host_pa_to_guest_pa(struct guest_info * guest_info, addr_t host_pa, addr_t * guest_pa) { *guest_pa = 0; + PrintError("ERROR!!! HPA->GPA currently not implemented!!!\n"); return -1; } @@ -70,14 +95,16 @@ 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; + addr_t host_pa = 0; *guest_pa = 0; if (host_va_to_host_pa(host_va, &host_pa) != 0) { + PrintError("In HVA->GPA: Invalid HVA(%x)->HPA lookup\n", host_va); return -1; } if (host_pa_to_guest_pa(guest_info, host_pa, guest_pa) != 0) { + PrintError("In HVA->GPA: Invalid HPA(%x)->GPA lookup\n", host_pa); return -1; } @@ -88,15 +115,17 @@ int host_va_to_guest_pa(struct guest_info * guest_info, addr_t host_va, addr_t * int guest_pa_to_host_va(struct guest_info * guest_info, addr_t guest_pa, addr_t * host_va) { - addr_t host_pa; + addr_t host_pa = 0; *host_va = 0; if (guest_pa_to_host_pa(guest_info, guest_pa, &host_pa) != 0) { + PrintError("In GPA->HVA: Invalid GPA(%x)->HPA lookup\n", guest_pa); return -1; } if (host_pa_to_host_va(host_pa, host_va) != 0) { + PrintError("In GPA->HVA: Invalid HPA(%x)->HVA lookup\n", host_pa); return -1; } @@ -105,70 +134,79 @@ int guest_pa_to_host_va(struct guest_info * guest_info, addr_t guest_pa, addr_t int guest_va_to_guest_pa(struct guest_info * guest_info, addr_t guest_va, addr_t * guest_pa) { - if (guest_info->page_mode == SHADOW_PAGING) { - switch (guest_info->cpu_mode) { - case REAL: - case PROTECTED: - case LONG: - case PROTECTED_PAE: - // guest virtual address is the same as the physical - *guest_pa = guest_va; - return 0; - case PROTECTED_PG: - { - addr_t tmp_pa; - pde32_t * pde; - addr_t guest_pde = CR3_TO_PDE32(guest_info->shdw_pg_state.guest_cr3.r_reg); - - if (guest_pa_to_host_va(guest_info, guest_pde, (addr_t *)&pde) == -1) { - return -1; - } + 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 NOT_PRESENT: - *guest_pa = 0; - return -1; - case LARGE_PAGE: - *guest_pa = tmp_pa; - return 0; - case PTE32: - { - pte32_t * pte; - - if (guest_pa_to_host_va(guest_info, tmp_pa, (addr_t*)&pte) == -1) { - return -1; - } - - if (pte32_lookup(pte, guest_va, guest_pa) != 0) { - return -1; - } - - return 0; - } - default: - return -1; - } + + + // 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 = 0; + + if (guest_info->shdw_pg_mode == SHADOW_PAGING) { + guest_pde = (addr_t)CR3_TO_PDE32((void *)(guest_info->shdw_pg_state.guest_cr3)); + } else if (guest_info->shdw_pg_mode == NESTED_PAGING) { + guest_pde = (addr_t)CR3_TO_PDE32((void *)(guest_info->ctrl_regs.cr3)); } - case PROTECTED_PAE_PG: - { - // Fill in - } - case LONG_PG: + + if (guest_pa_to_host_va(guest_info, guest_pde, (addr_t *)&pde) == -1) { + PrintError("In GVA->GPA: Invalid GPA(%x)->HVA PDE32 lookup\n", guest_pde); + return -1; + } + + + 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: { - // Fill in + pte32_t * pte = 0; + + + if (guest_pa_to_host_va(guest_info, tmp_pa, (addr_t*)&pte) == -1) { + PrintError("In GVA->GPA: Invalid GPA(%x)->HVA PTE32 lookup\n", guest_pa); + 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) { + PrintError("In GVA->GPA: PTE32 Lookup failure GVA=%x; PTE=%x\n", guest_va, pte); + // PrintPT32(PDE32_INDEX(guest_va) << 22, pte); + return -1; + } + + return 0; } - default: - return -1; + default: + return -1; + } } - } else if (guest_info->page_mode == NESTED_PAGING) { - - // Fill in - - } else { + case PROTECTED_PAE: + { + // Fill in + } + case LONG: + { + // Fill in + } + default: return -1; } - - + + + return 0; } @@ -181,6 +219,7 @@ int guest_va_to_guest_pa(struct guest_info * guest_info, addr_t guest_va, addr_t */ int guest_pa_to_guest_va(struct guest_info * guest_info, addr_t guest_pa, addr_t * guest_va) { *guest_va = 0; + PrintError("ERROR!!: GPA->GVA Not Implemented!!\n"); return -1; } @@ -191,15 +230,17 @@ 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; + addr_t guest_pa = 0; *host_pa = 0; if (guest_va_to_guest_pa(guest_info, guest_va, &guest_pa) != 0) { + PrintError("In GVA->HPA: Invalid GVA(%x)->GPA lookup\n", guest_va); return -1; } if (guest_pa_to_host_pa(guest_info, guest_pa, host_pa) != 0) { + PrintError("In GVA->HPA: Invalid GPA(%x)->HPA lookup\n", guest_pa); return -1; } @@ -208,15 +249,17 @@ int guest_va_to_host_pa(struct guest_info * guest_info, addr_t guest_va, addr_t /* !! 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; + addr_t guest_pa = 0; *guest_va = 0; if (host_pa_to_guest_pa(guest_info, host_pa, &guest_pa) != 0) { + PrintError("In HPA->GVA: Invalid HPA(%x)->GPA lookup\n", host_pa); return -1; } if (guest_pa_to_guest_va(guest_info, guest_pa, guest_va) != 0) { + PrintError("In HPA->GVA: Invalid GPA(%x)->GVA lookup\n", guest_pa); return -1; } @@ -227,20 +270,23 @@ int host_pa_to_guest_va(struct guest_info * guest_info, addr_t host_pa, addr_t * int guest_va_to_host_va(struct guest_info * guest_info, addr_t guest_va, addr_t * host_va) { - addr_t guest_pa; - addr_t host_pa; + addr_t guest_pa = 0; + addr_t host_pa = 0; *host_va = 0; if (guest_va_to_guest_pa(guest_info, guest_va, &guest_pa) != 0) { + PrintError("In GVA->HVA: Invalid GVA(%x)->GPA lookup\n", guest_va); return -1; } if (guest_pa_to_host_pa(guest_info, guest_pa, &host_pa) != 0) { + PrintError("In GVA->HVA: Invalid GPA(%x)->HPA lookup\n", guest_pa); return -1; } if (host_pa_to_host_va(host_pa, host_va) != 0) { + PrintError("In GVA->HVA: Invalid HPA(%x)->HVA lookup\n", host_pa); return -1; } @@ -250,20 +296,23 @@ int guest_va_to_host_va(struct guest_info * guest_info, addr_t guest_va, addr_t /* !! 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; - addr_t guest_pa; + addr_t host_pa = 0; + addr_t guest_pa = 0; *guest_va = 0; if (host_va_to_host_pa(host_va, &host_pa) != 0) { + PrintError("In HVA->GVA: Invalid HVA(%x)->HPA 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(%x)->GPA lookup\n", host_va); return -1; } if (guest_pa_to_guest_va(guest_info, guest_pa, guest_va) != 0) { + PrintError("In HVA->GVA: Invalid GPA(%x)->GVA lookup\n", guest_pa); return -1; } @@ -278,18 +327,24 @@ 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) { +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_OFFSET(cursor) + PAGE_SIZE) - cursor; + 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; + addr_t host_addr = 0; + if (guest_va_to_host_va(guest_info, cursor, &host_addr) != 0) { + PrintDebug("Invalid GVA(%x)->HVA lookup\n", cursor); return bytes_read; } + + memcpy(dest + bytes_read, (void*)host_addr, bytes_to_copy); @@ -309,24 +364,31 @@ 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) { +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_OFFSET(cursor) + PAGE_SIZE) - cursor; + 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; + 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); + */ + memcpy(dest + bytes_read, (void*)host_addr, bytes_to_copy); bytes_read += bytes_to_copy; count -= bytes_to_copy; - cursor += bytes_to_copy; + cursor += bytes_to_copy; } return bytes_read; @@ -338,12 +400,12 @@ 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) { +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_OFFSET(cursor) + PAGE_SIZE) - cursor; + 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; @@ -351,8 +413,9 @@ int write_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int c return bytes_written; } + memcpy((void*)host_addr, src + bytes_written, bytes_to_copy); - + bytes_written += bytes_to_copy; count -= bytes_to_copy; cursor += bytes_to_copy;