X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_ctrl_regs.c;h=b3d3356a3cc60126543813962b80fa45835b6410;hb=62406cf6b87a27a62921ce09a0aa44780ea25c06;hp=26272cc9cbf2170acec41b9fb1d893eb4e8f3405;hpb=56f8088296ee4116a4811a2f4f843edd80a7748d;p=palacios.releases.git diff --git a/palacios/src/palacios/vmm_ctrl_regs.c b/palacios/src/palacios/vmm_ctrl_regs.c index 26272cc..b3d3356 100644 --- a/palacios/src/palacios/vmm_ctrl_regs.c +++ b/palacios/src/palacios/vmm_ctrl_regs.c @@ -1,6 +1,21 @@ -/* (c) 2008, Jack Lange */ -/* (c) 2008, The V3VEE Project */ - +/* + * 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 @@ -26,8 +41,8 @@ // First Attempt = 494 lines // current = 106 lines -int handle_cr0_write(struct guest_info * info) { - char instr[15]; +int v3_handle_cr0_write(struct guest_info * info) { + uchar_t instr[15]; int ret; struct x86_instr dec_instr; @@ -51,7 +66,7 @@ int handle_cr0_write(struct guest_info * info) { } - if (opcode_cmp(V3_OPCODE_LMSW, (const uchar_t *)(dec_instr.opcode)) == 0) { + if (v3_opcode_cmp(V3_OPCODE_LMSW, (const uchar_t *)(dec_instr.opcode)) == 0) { struct cr0_real *real_cr0 = (struct cr0_real*)&(info->ctrl_regs.cr0); struct cr0_real *new_cr0 = (struct cr0_real *)(dec_instr.src_operand.operand); uchar_t new_cr0_val; @@ -62,62 +77,66 @@ int handle_cr0_write(struct guest_info * info) { PrintDebug("OperandVal = %x\n", new_cr0_val); - PrintDebug("Old CR0=%x\n", *real_cr0); + PrintDebug("Old CR0=%x\n", *(uint_t *)real_cr0); *(uchar_t*)real_cr0 &= 0xf0; *(uchar_t*)real_cr0 |= new_cr0_val; - PrintDebug("New CR0=%x\n", *real_cr0); + PrintDebug("New CR0=%x\n", *(uint_t *)real_cr0); if (info->shdw_pg_mode == SHADOW_PAGING) { struct cr0_real * shadow_cr0 = (struct cr0_real*)&(info->shdw_pg_state.guest_cr0); - PrintDebug(" Old Shadow CR0=%x\n", *shadow_cr0); + PrintDebug(" Old Shadow CR0=%x\n", *(uint_t *)shadow_cr0); *(uchar_t*)shadow_cr0 &= 0xf0; *(uchar_t*)shadow_cr0 |= new_cr0_val; - PrintDebug("New Shadow CR0=%x\n", *shadow_cr0); + PrintDebug("New Shadow CR0=%x\n", *(uint_t *)shadow_cr0); } - } else if (opcode_cmp(V3_OPCODE_MOV2CR, (const uchar_t *)(dec_instr.opcode)) == 0) { + } else if (v3_opcode_cmp(V3_OPCODE_MOV2CR, (const uchar_t *)(dec_instr.opcode)) == 0) { PrintDebug("MOV2CR0\n"); if (info->cpu_mode == LONG) { // 64 bit registers + // Set efer.lma = 1 + + PrintError("Long mode currently not handled\n"); + return -1; } else { // 32 bit registers struct cr0_32 *real_cr0 = (struct cr0_32*)&(info->ctrl_regs.cr0); struct cr0_32 *new_cr0= (struct cr0_32 *)(dec_instr.src_operand.operand); - PrintDebug("OperandVal = %x, length=%d\n", *new_cr0, dec_instr.src_operand.size); + PrintDebug("OperandVal = %x, length=%d\n", *(uint_t *)new_cr0, dec_instr.src_operand.size); - PrintDebug("Old CR0=%x\n", *real_cr0); + PrintDebug("Old CR0=%x\n", *(uint_t *)real_cr0); *real_cr0 = *new_cr0; if (info->shdw_pg_mode == SHADOW_PAGING) { struct cr0_32 * shadow_cr0 = (struct cr0_32 *)&(info->shdw_pg_state.guest_cr0); - PrintDebug("Old Shadow CR0=%x\n", *shadow_cr0); + PrintDebug("Old Shadow CR0=%x\n", *(uint_t *)shadow_cr0); real_cr0->et = 1; *shadow_cr0 = *new_cr0; shadow_cr0->et = 1; - if (get_mem_mode(info) == VIRTUAL_MEM) { + if (v3_get_mem_mode(info) == VIRTUAL_MEM) { struct cr3_32 * shadow_cr3 = (struct cr3_32 *)&(info->shdw_pg_state.shadow_cr3); - + PrintDebug("Setting up Shadow Page Table\n"); info->ctrl_regs.cr3 = *(addr_t*)shadow_cr3; } else { info->ctrl_regs.cr3 = *(addr_t*)&(info->direct_map_pt); real_cr0->pg = 1; } - PrintDebug("New Shadow CR0=%x\n",*shadow_cr0); + PrintDebug("New Shadow CR0=%x\n",*(uint_t *)shadow_cr0); } - PrintDebug("New CR0=%x\n", *real_cr0); + PrintDebug("New CR0=%x\n", *(uint_t *)real_cr0); } - } else if (opcode_cmp(V3_OPCODE_CLTS, (const uchar_t *)(dec_instr.opcode)) == 0) { + } else if (v3_opcode_cmp(V3_OPCODE_CLTS, (const uchar_t *)(dec_instr.opcode)) == 0) { // CLTS struct cr0_32 *real_cr0 = (struct cr0_32*)&(info->ctrl_regs.cr0); @@ -140,8 +159,8 @@ int handle_cr0_write(struct guest_info * info) { // First attempt = 253 lines // current = 51 lines -int handle_cr0_read(struct guest_info * info) { - char instr[15]; +int v3_handle_cr0_read(struct guest_info * info) { + uchar_t instr[15]; int ret; struct x86_instr dec_instr; @@ -164,12 +183,12 @@ int handle_cr0_read(struct guest_info * info) { return -1; } - if (opcode_cmp(V3_OPCODE_MOVCR2, (const uchar_t *)(dec_instr.opcode)) == 0) { + if (v3_opcode_cmp(V3_OPCODE_MOVCR2, (const uchar_t *)(dec_instr.opcode)) == 0) { struct cr0_32 * virt_cr0 = (struct cr0_32 *)(dec_instr.dst_operand.operand); struct cr0_32 * real_cr0 = (struct cr0_32 *)&(info->ctrl_regs.cr0); PrintDebug("MOVCR2\n"); - PrintDebug("CR0 at 0x%x\n", real_cr0); + PrintDebug("CR0 at 0x%p\n", (void *)real_cr0); if (info->shdw_pg_mode == SHADOW_PAGING) { *virt_cr0 = *(struct cr0_32 *)&(info->shdw_pg_state.guest_cr0); @@ -179,14 +198,14 @@ int handle_cr0_read(struct guest_info * info) { PrintDebug("real CR0: %x\n", *(uint_t*)real_cr0); PrintDebug("returned CR0: %x\n", *(uint_t*)virt_cr0); - } else if (opcode_cmp(V3_OPCODE_SMSW, (const uchar_t *)(dec_instr.opcode)) == 0) { + } else if (v3_opcode_cmp(V3_OPCODE_SMSW, (const uchar_t *)(dec_instr.opcode)) == 0) { struct cr0_real *real_cr0= (struct cr0_real*)&(info->ctrl_regs.cr0); struct cr0_real *virt_cr0 = (struct cr0_real *)(dec_instr.dst_operand.operand); char cr0_val = *(char*)real_cr0 & 0x0f; PrintDebug("SMSW\n"); - PrintDebug("CR0 at 0x%x\n", real_cr0); + PrintDebug("CR0 at 0x%p\n", real_cr0); *(char *)virt_cr0 &= 0xf0; *(char *)virt_cr0 |= cr0_val; @@ -205,9 +224,9 @@ int handle_cr0_read(struct guest_info * info) { // First Attempt = 256 lines // current = 65 lines -int handle_cr3_write(struct guest_info * info) { +int v3_handle_cr3_write(struct guest_info * info) { int ret; - char instr[15]; + uchar_t instr[15]; struct x86_instr dec_instr; if (info->mem_mode == PHYSICAL_MEM) { @@ -229,11 +248,11 @@ int handle_cr3_write(struct guest_info * info) { return -1; } - if (opcode_cmp(V3_OPCODE_MOV2CR, (const uchar_t *)(dec_instr.opcode)) == 0) { + if (v3_opcode_cmp(V3_OPCODE_MOV2CR, (const uchar_t *)(dec_instr.opcode)) == 0) { PrintDebug("MOV2CR3\n"); - PrintDebug("CR3 at 0x%x\n", &(info->ctrl_regs.cr3)); + PrintDebug("CR3 at 0x%p\n", &(info->ctrl_regs.cr3)); if (info->shdw_pg_mode == SHADOW_PAGING) { struct cr3_32 * new_cr3 = (struct cr3_32 *)(dec_instr.src_operand.operand); @@ -246,25 +265,32 @@ int handle_cr3_write(struct guest_info * info) { *(uint_t*)shadow_cr3, *(uint_t*)guest_cr3); - cached = cache_page_tables32(info, CR3_TO_PDE32(*(addr_t *)new_cr3)); + cached = v3_cache_page_tables32(info, (addr_t)V3_PAddr((void *)(addr_t)CR3_TO_PDE32((void *)*(addr_t *)new_cr3))); + if (cached == -1) { PrintError("CR3 Cache failed\n"); return -1; } else if (cached == 0) { addr_t shadow_pt; - PrintDebug("New CR3 is different - flushing shadow page table\n"); + if(info->mem_mode == VIRTUAL_MEM) { + PrintDebug("New CR3 is different - flushing shadow page table %p\n", shadow_cr3 ); + delete_page_tables_32((pde32_t *)CR3_TO_PDE32(*(uint_t*)shadow_cr3)); + } - delete_page_tables_pde32((pde32_t *)CR3_TO_PDE32(*(uint_t*)shadow_cr3)); + shadow_pt = v3_create_new_shadow_pt(); - shadow_pt = create_new_shadow_pt32(); - - shadow_cr3->pdt_base_addr = PD32_BASE_ADDR(shadow_pt); + shadow_cr3->pdt_base_addr = (addr_t)V3_PAddr((void *)(addr_t)PD32_BASE_ADDR(shadow_pt)); + PrintDebug( "Created new shadow page table %p\n", (void *)(addr_t)shadow_cr3->pdt_base_addr ); + //PrintDebugPageTables( (pde32_t *)CR3_TO_PDE32(*(uint_t*)shadow_cr3) ); + + } else { PrintDebug("Reusing cached shadow Page table\n"); } + shadow_cr3->pwt = new_cr3->pwt; shadow_cr3->pcd = new_cr3->pcd; @@ -293,8 +319,8 @@ int handle_cr3_write(struct guest_info * info) { // first attempt = 156 lines // current = 36 lines -int handle_cr3_read(struct guest_info * info) { - char instr[15]; +int v3_handle_cr3_read(struct guest_info * info) { + uchar_t instr[15]; int ret; struct x86_instr dec_instr; @@ -317,11 +343,11 @@ int handle_cr3_read(struct guest_info * info) { return -1; } - if (opcode_cmp(V3_OPCODE_MOVCR2, (const uchar_t *)(dec_instr.opcode)) == 0) { + if (v3_opcode_cmp(V3_OPCODE_MOVCR2, (const uchar_t *)(dec_instr.opcode)) == 0) { PrintDebug("MOVCR32\n"); struct cr3_32 * virt_cr3 = (struct cr3_32 *)(dec_instr.dst_operand.operand); - PrintDebug("CR3 at 0x%x\n", &(info->ctrl_regs.cr3)); + PrintDebug("CR3 at 0x%p\n", &(info->ctrl_regs.cr3)); if (info->shdw_pg_mode == SHADOW_PAGING) { *virt_cr3 = *(struct cr3_32 *)&(info->shdw_pg_state.guest_cr3); @@ -337,3 +363,127 @@ int handle_cr3_read(struct guest_info * info) { return 0; } + +int v3_handle_cr4_read(struct guest_info * info) { + PrintError("CR4 Read not handled\n"); + return -1; +} + +int v3_handle_cr4_write(struct guest_info * info) { + uchar_t instr[15]; + int ret; + struct x86_instr dec_instr; + + if (info->mem_mode == PHYSICAL_MEM) { + ret = read_guest_pa_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr); + } else { + ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr); + } + + if (v3_decode(info, (addr_t)instr, &dec_instr) == -1) { + PrintError("Could not decode instruction\n"); + return -1; + } + + if (v3_opcode_cmp(V3_OPCODE_MOV2CR, (const uchar_t *)(dec_instr.opcode)) != 0) { + PrintError("Invalid opcode in write to CR4\n"); + return -1; + } + + if ((info->cpu_mode == PROTECTED) || (info->cpu_mode == PROTECTED_PAE)) { + struct cr4_32 * new_cr4 = (struct cr4_32 *)(dec_instr.src_operand.operand); + struct cr4_32 * old_cr4 = (struct cr4_32 *)&(info->ctrl_regs.cr4); + + PrintDebug("OperandVal = %x, length = %d\n", *(uint_t *)new_cr4, dec_instr.src_operand.size); + PrintDebug("Old CR4=%x\n", *(uint_t *)old_cr4); + + + + + if ((info->shdw_pg_mode == SHADOW_PAGING) && + (v3_get_mem_mode(info) == PHYSICAL_MEM)) { + + if ((old_cr4->pae == 0) && (new_cr4->pae == 1)) { + PrintDebug("Creating PAE passthrough tables\n"); + + // Delete the old 32 bit direct map page tables + delete_page_tables_32((pde32_t *)V3_VAddr((void *)(info->direct_map_pt))); + + // create 32 bit PAE direct map page table + info->direct_map_pt = (addr_t)V3_PAddr(create_passthrough_pts_32PAE(info)); + + // reset cr3 to new page tables + info->ctrl_regs.cr3 = *(addr_t*)&(info->direct_map_pt); + + } else if ((old_cr4->pae == 1) && (new_cr4->pae == 0)) { + // Create passthrough standard 32bit pagetables + return -1; + } + } + + *old_cr4 = *new_cr4; + PrintDebug("New CR4=%x\n", *(uint_t *)old_cr4); + + } else { + return -1; + } + + info->rip += dec_instr.instr_length; + return 0; +} + + +int v3_handle_efer_read(uint_t msr, struct v3_msr * dst, void * priv_data) { + PrintError("EFER Read not handled\n"); + return -1; +} + + +int v3_handle_efer_write(uint_t msr, struct v3_msr src, void * priv_data) { + struct guest_info * info = (struct guest_info *)(priv_data); + struct efer_64 * new_efer = (struct efer_64 *)&(src.value); + struct efer_64 * old_efer = (struct efer_64 *)&(info->ctrl_regs.efer); + + PrintDebug("Old EFER=%p\n", (void *)*(addr_t*)(old_efer)); + + if ((info->shdw_pg_mode == SHADOW_PAGING) && + (v3_get_mem_mode(info) == PHYSICAL_MEM)) { + + if ((old_efer->lme == 0) && (new_efer->lme == 1)) { + PrintDebug("Transition to longmode\n"); + PrintDebug("Creating Passthrough 64 bit page tables\n"); + + // Delete the old 32 bit direct map page tables + /* + * JRL BUG? + * Will these page tables always be in PAE format?? + */ + PrintDebug("Deleting old PAE Page tables\n"); + PrintError("JRL BUG?: Will the old page tables always be in PAE format??\n"); + delete_page_tables_32PAE((pdpe32pae_t *)V3_VAddr((void *)(info->direct_map_pt))); + + // create 64 bit direct map page table + info->direct_map_pt = (addr_t)V3_PAddr(create_passthrough_pts_64(info)); + + // reset cr3 to new page tables + info->ctrl_regs.cr3 = *(addr_t*)&(info->direct_map_pt); + + + // Does this mean we will have to fully virtualize a shadow EFER?? + new_efer->lma = 1; + + } else if ((old_efer->lme == 1) && (new_efer->lme == 0)) { + // transition out of long mode + return -1; + } + + *old_efer = *new_efer; + PrintDebug("New EFER=%p\n", (void *)*(addr_t *)(old_efer)); + } else { + return -1; + } + + info->rip += 2; // WRMSR/RDMSR are two byte operands + + return 0; +}