X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvm_guest_mem.c;fp=palacios%2Fsrc%2Fpalacios%2Fvm_guest_mem.c;h=920c8bb857d822b347e933834a38f64ff5599002;hp=0000000000000000000000000000000000000000;hb=ddc16b0737cf58f7aa90a69c6652cdf4090aec51;hpb=626595465a2c6987606a6bc697df65130ad8c2d3 diff --git a/palacios/src/palacios/vm_guest_mem.c b/palacios/src/palacios/vm_guest_mem.c new file mode 100644 index 0000000..920c8bb --- /dev/null +++ b/palacios/src/palacios/vm_guest_mem.c @@ -0,0 +1,448 @@ +/* + * 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 v3_os_hooks * os_hooks; + + +/**********************************/ +/* GROUP 0 */ +/**********************************/ + +int host_va_to_host_pa(addr_t host_va, addr_t * host_pa) { + if ((os_hooks) && (os_hooks)->vaddr_to_paddr) { + + *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; +} + + +int host_pa_to_host_va(addr_t host_pa, addr_t * host_va) { + if ((os_hooks) && (os_hooks)->paddr_to_vaddr) { + + *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; +} + + + +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... + host_region_type_t reg_type = lookup_shadow_map_addr(&(guest_info->mem_map), guest_pa, host_pa); + + if (reg_type != HOST_REGION_PHYSICAL_MEMORY) { + PrintError("In GPA->HPA: Could not find address in shadow map (addr=%p) (reg_type=%d)\n", + (void *)guest_pa, reg_type); + return -1; + } + + return 0; +} + + +/* !! Currently not implemented !! */ +// This is a scan of the shadow map +// 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; + PrintError("ERROR!!! HPA->GPA currently not implemented!!!\n"); + + return -1; +} + + + +/**********************************/ +/* GROUP 1 */ +/**********************************/ + + +/* !! 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; + + 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; + } + + 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; + + *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; + } + + 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; + } + + + + // 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)V3_PAddr((void *)(addr_t)CR3_TO_PDE32((void *)(addr_t)(guest_info->shdw_pg_state.guest_cr3))); + } else if (guest_info->shdw_pg_mode == NESTED_PAGING) { + guest_pde = (addr_t)V3_PAddr((void *)(addr_t)CR3_TO_PDE32((void *)(addr_t)(guest_info->ctrl_regs.cr3))); + } + + if (guest_pa_to_host_va(guest_info, guest_pde, (addr_t *)&pde) == -1) { + PrintError("In GVA->GPA: Invalid GPA(%p)->HVA PDE32 lookup\n", + (void *)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: + { + pte32_t * pte = 0; + + + if (guest_pa_to_host_va(guest_info, tmp_pa, (addr_t*)&pte) == -1) { + PrintError("In GVA->GPA: Invalid GPA(%p)->HVA PTE32 lookup\n", + (void *)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=%p; PTE=%p\n", + (void *)guest_va, (void *)pte); + // PrintPT32(PDE32_INDEX(guest_va) << 22, pte); + return -1; + } + + return 0; + } + default: + return -1; + } + } + case PROTECTED_PAE: + { + // Fill in + } + case LONG: + { + // Fill in + } + default: + return -1; + } + + + + return 0; +} + + + +/* !! Currently not implemented !! */ +/* This will be a real pain.... its your standard page table walker in guest memory + * + * 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; + PrintError("ERROR!!: GPA->GVA Not Implemented!!\n"); + return -1; +} + + +/**********************************/ +/* GROUP 2 */ +/**********************************/ + + +int guest_va_to_host_pa(struct guest_info * guest_info, addr_t guest_va, addr_t * host_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; + } + + 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; + + *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; + } + + 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; + + *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; + } + + 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; + + *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; + } + + return 0; +} + + + + + + +/* 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, 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; + + + 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); + + bytes_read += bytes_to_copy; + count -= bytes_to_copy; + cursor += bytes_to_copy; + } + + return bytes_read; +} + + + + + + +/* 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, 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); + */ + + memcpy(dest + bytes_read, (void*)host_addr, bytes_to_copy); + + bytes_read += bytes_to_copy; + count -= bytes_to_copy; + cursor += bytes_to_copy; + } + + return bytes_read; +} + + + + +/* 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, 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; + + 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); + + bytes_written += bytes_to_copy; + count -= bytes_to_copy; + cursor += bytes_to_copy; + } + + return bytes_written; +} +