X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_direct_paging_32.h;h=52f0991ea3a34e64b9591da82af4c09a9cebe327;hb=cfcceed5890430afedcc544bd7dbb69e29dfd65a;hp=2b34cf2cfdeecfb0d52b7b90be396e63d3bc96f2;hpb=af10c7cdec94c879b207983a60581feae911546b;p=palacios.git diff --git a/palacios/src/palacios/vmm_direct_paging_32.h b/palacios/src/palacios/vmm_direct_paging_32.h index 2b34cf2..52f0991 100644 --- a/palacios/src/palacios/vmm_direct_paging_32.h +++ b/palacios/src/palacios/vmm_direct_paging_32.h @@ -1,3 +1,23 @@ +/* + * 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, Steven Jaconette + * Copyright (c) 2008, Jack Lange + * Copyright (c) 2008, The V3VEE Project + * All rights reserved. + * + * Author: Steven Jaconette + * + * This is free software. You are permitted to use, + * redistribute, and modify it as specified in the file "V3VEE_LICENSE". + */ + #ifndef __VMM_DIRECT_PAGING_32_H__ #define __VMM_DIRECT_PAGING_32_H__ @@ -7,85 +27,120 @@ #include #include -static pde32_t * create_pde32() { - void * pde = 0; - pde = V3_VAddr(V3_AllocPages(1)); - memset(pde, 0, PAGE_SIZE); - - return (pde32_t *) pde; -} +static inline int handle_passthrough_pagefault_32(struct guest_info * info, + addr_t fault_addr, + pf_error_t error_code) { + // Check to see if pde and pte exist (create them if not) + pde32_t * pde = NULL; + pte32_t * pte = NULL; + addr_t host_addr = 0; + + int pde_index = PDE32_INDEX(fault_addr); + int pte_index = PTE32_INDEX(fault_addr); + + struct v3_shadow_region * region = v3_get_shadow_region(info, fault_addr); -static pte32_t * create_pte32() { - void * pte = 0; - pte = V3_VAddr(V3_AllocPages(1)); - memset(pte, 0, PAGE_SIZE); + if (region == NULL) { + PrintError("Invalid region in passthrough page fault 32, addr=%p\n", + (void *)fault_addr); + return -1; + } + + host_addr = v3_get_shadow_addr(region, fault_addr); + + // Lookup the correct PDE address based on the PAGING MODE + if (info->shdw_pg_mode == SHADOW_PAGING) { + pde = CR3_TO_PDE32_VA(info->ctrl_regs.cr3); + } else { + pde = CR3_TO_PDE32_VA(info->direct_map_pt); + } - return (pte32_t *) pte; -} + // Fix up the PDE entry + if (pde[pde_index].present == 0) { + pte = (pte32_t *)create_generic_pt_page(); + + pde[pde_index].present = 1; + pde[pde_index].writable = 1; + pde[pde_index].user_page = 1; + pde[pde_index].pt_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pte)); + + } else { + pte = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pde[pde_index].pt_base_addr)); + } + + // Fix up the PTE entry + if (pte[pte_index].present == 0) { + + pte[pte_index].user_page = 1; + + if (region->host_type == SHDW_REGION_ALLOCATED) { + // Full access + pte[pte_index].present = 1; + pte[pte_index].writable = 1; + + pte[pte_index].page_base_addr = PAGE_BASE_ADDR(host_addr); + } else if (region->host_type == SHDW_REGION_WRITE_HOOK) { + // Only trap writes + PrintDebug("Faulted in a write hook page\n"); + pte[pte_index].present = 1; + pte[pte_index].writable = 0; + + pte[pte_index].page_base_addr = PAGE_BASE_ADDR(host_addr); + } else if (region->host_type == SHDW_REGION_FULL_HOOK) { + // trap all accesses + return v3_handle_mem_full_hook(info, fault_addr, fault_addr, region, error_code); + } else { + PrintError("Unknown Region Type...\n"); + return -1; + } + } + + if ( (region->host_type == SHDW_REGION_WRITE_HOOK) && + (error_code.write == 1) ) { + PrintDebug("Triggering Direct paging Write hook\n"); + return v3_handle_mem_wr_hook(info, fault_addr, fault_addr, region, error_code); + } -static inline pde32_t * create_direct_passthrough_pts_32(struct guest_info * info) { - return create_pde32(); + + return 0; } -static inline int handle_passthrough_pagefault_32(struct guest_info * info, - addr_t fault_addr, - pf_error_t error_code) { - // Check to see if pde and pte exist (create them if not) - pde32_t * pde = CR3_TO_PDE32_VA(info->ctrl_regs.cr3); - int pde_index = PDE32_INDEX(fault_addr); - int pte_index = PTE32_INDEX(fault_addr); - if (pde[pde_index].present != 1) { - PrintError("Creating new page table for PTE index: %d\n", pde_index); +static inline int invalidate_addr_32(struct guest_info * info, addr_t inv_addr) { + pde32_t * pde = NULL; + pte32_t * pte = NULL; - pte32_t * pte = create_pte32(); - addr_t host_addr; + // TODO: + // Call INVLPGA - if(guest_pa_to_host_pa(info, fault_addr, &host_addr) == -1) return -1; + // clear the page table entry + int pde_index = PDE32_INDEX(inv_addr); + int pte_index = PTE32_INDEX(inv_addr); - struct v3_shadow_region * region = v3_get_shadow_region(info, PAGE_BASE_ADDR(host_addr)); - - pte[pte_index].present = 1; - pte[pte_index].writable = 1; - pte[pte_index].user_page = 1; - pte[pte_index].page_base_addr = PAGE_BASE_ADDR(host_addr); - - pde[pde_index].present = 1; - pde[pde_index].writable = 1; - pde[pde_index].user_page = 1; - pde[pde_index].pt_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pte)); - if (region->host_type == SHDW_REGION_WRITE_HOOK) { - pte[pte_index].writable = 0; + // Lookup the correct PDE address based on the PAGING MODE + if (info->shdw_pg_mode == SHADOW_PAGING) { + pde = CR3_TO_PDE32_VA(info->ctrl_regs.cr3); + } else { + pde = CR3_TO_PDE32_VA(info->direct_map_pt); + } + + if (pde[pde_index].present == 0) { + return 0; + } else if (pde[pde_index].large_page) { + pde[pde_index].present = 0; + return 0; } - - PrintError("Fault Addr: 0x%p\nHost Addr: 0x%p\n", (void*)fault_addr, (void*)host_addr); - - } else { - pte32_t * pte = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pde[pde_index].pt_base_addr)); - - if (pte[pte_index].present != 1) { - addr_t host_addr; - - if (guest_pa_to_host_pa(info, fault_addr, &host_addr) == -1) return -1; - - struct v3_shadow_region * region = v3_get_shadow_region(info, PAGE_BASE_ADDR(host_addr)); - - pte[pte_index].present = 1; - pte[pte_index].writable = 1; - pte[pte_index].user_page = 1; - pte[pte_index].page_base_addr = PAGE_BASE_ADDR(host_addr); - - if (region->host_type == SHDW_REGION_WRITE_HOOK) { - pte[pte_index].writable = 0; - } - } - } - return 0; + + pte = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pde[pde_index].pt_base_addr)); + + pte[pte_index].present = 0; + + return 0; }