X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvm_guest_mem.c;h=b8db954cfa2d8ccb8b845c9681cdec74412d1c5c;hb=24178516ccd9f46718b687d4c630415eb63ff595;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..b8db954 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 +34,12 @@ 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(%p)->HPA lookup\n", + (void *)host_va); return -1; } } else { + PrintError("In HVA->HPA: os_hooks not defined\n"); return -1; } return 0; @@ -30,9 +52,12 @@ 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(%p)->HVA lookup\n", + (void *)host_pa); return -1; } } else { + PrintError("In HPA->HVA: os_hooks not defined\n"); return -1; } return 0; @@ -41,8 +66,15 @@ 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) { + struct v3_shadow_region * shdw_reg = v3_get_shadow_region(guest_info, guest_pa); + + *host_pa = v3_get_shadow_addr(shdw_reg, guest_pa); + + if ((shdw_reg == NULL) || + (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; } @@ -56,6 +88,7 @@ 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 +103,18 @@ 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(%p)->HPA lookup\n", + (void *)host_va); 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; } @@ -88,15 +125,19 @@ 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(%p)->HPA lookup\n", + (void *)guest_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; } @@ -105,70 +146,50 @@ 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; - } - - 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; - } - } - case PROTECTED_PAE_PG: - { - // Fill in - } - case LONG_PG: - { - // Fill in - } - default: - return -1; - } - } else if (guest_info->page_mode == NESTED_PAGING) { + v3_reg_t guest_cr3 = 0; - // Fill in + 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_cr3 = guest_info->shdw_pg_state.guest_cr3; } else { - return -1; + guest_cr3 = guest_info->ctrl_regs.cr3; } + // 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; + } + 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; + } + 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; + } + return 0; } @@ -181,6 +202,7 @@ 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 +213,19 @@ 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(%p)->GPA lookup\n", + (void *)guest_va); 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; } @@ -208,15 +234,19 @@ 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(%p)->GPA lookup\n", + (void *)host_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; } @@ -227,20 +257,26 @@ 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(%p)->GPA lookup\n", + (void *)guest_va); 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) { + PrintError("In GVA->HVA: Invalid HPA(%p)->HVA lookup\n", + (void *)host_pa); return -1; } @@ -250,20 +286,26 @@ 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(%p)->HPA lookup\n", + (void *)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) { + PrintError("In HVA->GVA: Invalid GPA(%p)->GVA lookup\n", + (void *)guest_pa); return -1; } @@ -278,18 +320,24 @@ 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(%p)->HVA lookup\n", (void *)cursor); return bytes_read; } + + memcpy(dest + bytes_read, (void*)host_addr, bytes_to_copy); @@ -309,24 +357,31 @@ 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 +393,12 @@ 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 +406,9 @@ 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;