X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_ctrl_regs.c;h=4476b8b70d6a77119155351182e2205c1f565586;hb=5b6278751429f59297ce74e614d50632daea3748;hp=a55dd93f4991d70e7fb1f9519b27fa182723620d;hpb=6fa12b728fed57e76c4a4df5c87d989915c7d6c2;p=palacios.git diff --git a/palacios/src/palacios/vmm_ctrl_regs.c b/palacios/src/palacios/vmm_ctrl_regs.c index a55dd93..4476b8b 100644 --- a/palacios/src/palacios/vmm_ctrl_regs.c +++ b/palacios/src/palacios/vmm_ctrl_regs.c @@ -1,3 +1,22 @@ +/* + * 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 @@ -20,14 +39,10 @@ #endif - - - - // 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; @@ -37,11 +52,13 @@ int handle_cr0_write(struct guest_info * info) { ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr); } - if (ret != 15) { + /* The IFetch will already have faulted in the necessary bytes for the full instruction + if (ret != 15) { // I think we should inject a GPF into the guest PrintError("Could not read instruction (ret=%d)\n", ret); return -1; - } + } + */ if (v3_decode(info, (addr_t)instr, &dec_instr) == -1) { PrintError("Could not decode instruction\n"); @@ -49,9 +66,9 @@ 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.first_operand.operand); + struct cr0_real *new_cr0 = (struct cr0_real *)(dec_instr.src_operand.operand); uchar_t new_cr0_val; PrintDebug("LMSW\n"); @@ -60,62 +77,64 @@ 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 + 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.second_operand.operand); + struct cr0_32 *new_cr0= (struct cr0_32 *)(dec_instr.src_operand.operand); - PrintDebug("OperandVal = %x, length=%d\n", *new_cr0, dec_instr.first_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); @@ -138,8 +157,8 @@ 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; @@ -149,23 +168,25 @@ int handle_cr0_read(struct guest_info * info) { ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr); } - if (ret != 15) { - // I think we should inject a GPF into the guest - PrintError("Could not read instruction (ret=%d)\n", ret); - return -1; - } + /* The IFetch will already have faulted in the necessary bytes for the full instruction + if (ret != 15) { + // I think we should inject a GPF into the guest + PrintError("Could not read instruction (ret=%d)\n", ret); + return -1; + } + */ if (v3_decode(info, (addr_t)instr, &dec_instr) == -1) { PrintError("Could not decode instruction\n"); return -1; } - if (opcode_cmp(V3_OPCODE_MOVCR2, (const uchar_t *)(dec_instr.opcode)) == 0) { - struct cr0_32 * virt_cr0 = (struct cr0_32 *)(dec_instr.first_operand.operand); + 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); @@ -175,14 +196,14 @@ 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.first_operand.operand); + 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; @@ -199,11 +220,11 @@ int handle_cr0_read(struct guest_info * info) { -// First Attemp = 256 lines +// 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) { @@ -212,43 +233,61 @@ int handle_cr3_write(struct guest_info * info) { ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr); } - if (ret != 15) { - // I think we should inject a GPF into the guest - PrintError("Could not read instruction (ret=%d)\n", ret); - return -1; - } + /* The IFetch will already have faulted in the necessary bytes for the full instruction + if (ret != 15) { + // I think we should inject a GPF into the guest + PrintError("Could not read instruction (ret=%d)\n", ret); + return -1; + } + */ if (v3_decode(info, (addr_t)instr, &dec_instr) == -1) { PrintError("Could not decode instruction\n"); 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.second_operand.operand); + struct cr3_32 * new_cr3 = (struct cr3_32 *)(dec_instr.src_operand.operand); struct cr3_32 * guest_cr3 = (struct cr3_32 *)&(info->shdw_pg_state.guest_cr3); struct cr3_32 * shadow_cr3 = (struct cr3_32 *)&(info->shdw_pg_state.shadow_cr3); + int cached = 0; + PrintDebug("Old Shadow CR3=%x; Old Guest CR3=%x\n", *(uint_t*)shadow_cr3, *(uint_t*)guest_cr3); - if (!CR3_32_SAME_BASE(new_cr3, guest_cr3)) { - addr_t shadow_pt; + + cached = v3_cache_page_tables32(info, (addr_t)V3_PAddr((void *)(addr_t)CR3_TO_PDE32((void *)*(addr_t *)new_cr3))); - PrintDebug("New CR3 is different - flushing shadow page table\n"); + if (cached == -1) { + PrintError("CR3 Cache failed\n"); + return -1; + } else if (cached == 0) { + addr_t shadow_pt; - delete_page_tables_pde32((pde32_t *)CR3_TO_PDE32(*(uint_t*)shadow_cr3)); + if(info->mem_mode == VIRTUAL_MEM) { + PrintDebug("New CR3 is different - flushing shadow page table %p\n", shadow_cr3 ); + delete_page_tables_pde32((pde32_t *)CR3_TO_PDE32(*(uint_t*)shadow_cr3)); + } - shadow_pt = create_new_shadow_pt32(info); + shadow_pt = v3_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; @@ -278,8 +317,8 @@ 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; @@ -289,22 +328,24 @@ int handle_cr3_read(struct guest_info * info) { ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr); } - if (ret != 15) { - // I think we should inject a GPF into the guest - PrintError("Could not read instruction (ret=%d)\n", ret); - return -1; - } + /* The IFetch will already have faulted in the necessary bytes for the full instruction + if (ret != 15) { + // I think we should inject a GPF into the guest + PrintError("Could not read instruction (ret=%d)\n", ret); + return -1; + } + */ if (v3_decode(info, (addr_t)instr, &dec_instr) == -1) { PrintError("Could not decode instruction\n"); 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.first_operand.operand); + 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); @@ -316,8 +357,82 @@ int handle_cr3_read(struct guest_info * info) { return -1; } - info->rip += dec_instr.instr_length; 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)) { + // Create Passthrough PAE pagetables + PrintDebug("Creating PAE passthrough tables\n"); + info->ctrl_regs.cr3 = (addr_t)V3_PAddr(create_passthrough_pts_PAE32(info)); + } 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); + PrintError("EFER Write not handled (rax=%p, rdx=%p)\n", + (void *)(addr_t)(src.lo), + (void *)(addr_t)(src.hi)); + return -1; +}