X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fsvm.c;h=490e3428560ad8333e49f7be4f8bb936d98a3eb1;hp=3707d1f90c3a4c3d0e2b615ab8b2121042d43c6c;hb=23bb96e0a0572322649a4a7d74c52b248064b2ba;hpb=c163873b7b96544683030cafba0e73a7ed988171 diff --git a/palacios/src/palacios/svm.c b/palacios/src/palacios/svm.c index 3707d1f..490e342 100644 --- a/palacios/src/palacios/svm.c +++ b/palacios/src/palacios/svm.c @@ -36,17 +36,21 @@ #include -#include - #include #include +#include +#include + + +// This is a global pointer to the host's VMCB +static void * host_vmcb = NULL; extern void v3_stgi(); extern void v3_clgi(); //extern int v3_svm_launch(vmcb_t * vmcb, struct v3_gprs * vm_regs, uint64_t * fs, uint64_t * gs); -extern int v3_svm_launch(vmcb_t * vmcb, struct v3_gprs * vm_regs); +extern int v3_svm_launch(vmcb_t * vmcb, struct v3_gprs * vm_regs, vmcb_t * host_vmcb); static vmcb_t * Allocate_VMCB() { @@ -65,10 +69,11 @@ static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info *vm_info) { uint_t i; - guest_state->rsp = vm_info->vm_regs.rsp; - // guest_state->rip = vm_info->rip; + // + guest_state->rsp = 0x00; guest_state->rip = 0xfff0; + guest_state->cpl = 0; guest_state->efer |= EFER_MSR_svm_enable; @@ -119,7 +124,8 @@ static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info *vm_info) { vm_info->vm_regs.rdx = 0x00000f00; - guest_state->cr0 = 0x60000010; + + guest_state->cr0 = 0x60010010; // Set the WP flag so the memory hooks work in real-mode guest_state->cs.selector = 0xf000; @@ -163,37 +169,16 @@ static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info *vm_info) { guest_state->dr7 = 0x0000000000000400LL; - if ( !RB_EMPTY_ROOT(&(vm_info->io_map)) ) { - struct v3_io_hook * iter; - struct rb_node * io_node = v3_rb_first(&(vm_info->io_map)); - addr_t io_port_bitmap; - int i = 0; - - io_port_bitmap = (addr_t)V3_VAddr(V3_AllocPages(3)); - memset((uchar_t*)io_port_bitmap, 0, PAGE_SIZE * 3); - - ctrl_area->IOPM_BASE_PA = (addr_t)V3_PAddr((void *)io_port_bitmap); - - //PrintDebug("Setting up IO Map at 0x%x\n", io_port_bitmap); - - do { - iter = rb_entry(io_node, struct v3_io_hook, tree_node); - - ushort_t port = iter->port; - uchar_t * bitmap = (uchar_t *)io_port_bitmap; - //PrintDebug("%d: Hooking Port %d\n", i, port); + v3_init_svm_io_map(vm_info); + ctrl_area->IOPM_BASE_PA = (addr_t)V3_PAddr(vm_info->io_map.arch_data); + ctrl_area->instrs.IOIO_PROT = 1; - bitmap += (port / 8); - // PrintDebug("Setting Bit for port 0x%x\n", port); - *bitmap |= 1 << (port % 8); - i++; - } while ((io_node = v3_rb_next(io_node))); - //PrintDebugMemDump((uchar_t*)io_port_bitmap, PAGE_SIZE *2); + v3_init_svm_msr_map(vm_info); + ctrl_area->MSRPM_BASE_PA = (addr_t)V3_PAddr(vm_info->msr_map.arch_data); + ctrl_area->instrs.MSR_PROT = 1; - ctrl_area->instrs.IOIO_PROT = 1; - } PrintDebug("Exiting on interrupts\n"); @@ -204,6 +189,9 @@ static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info *vm_info) { if (vm_info->shdw_pg_mode == SHADOW_PAGING) { PrintDebug("Creating initial shadow page table\n"); + /* JRL: This is a performance killer, and a simplistic solution */ + /* We need to fix this */ + ctrl_area->TLB_CONTROL = 1; ctrl_area->guest_ASID = 1; @@ -225,8 +213,6 @@ static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info *vm_info) { ctrl_area->cr_reads.cr3 = 1; ctrl_area->cr_writes.cr3 = 1; - vm_info->guest_efer.value = 0x0LL; - v3_hook_msr(vm_info, EFER_MSR, &v3_handle_efer_read, &v3_handle_efer_write, @@ -236,10 +222,6 @@ static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info *vm_info) { ctrl_area->exceptions.pf = 1; - /* JRL: This is a performance killer, and a simplistic solution */ - /* We need to fix this */ - ctrl_area->TLB_CONTROL = 1; - guest_state->g_pat = 0x7040600070406ULL; guest_state->cr0 |= 0x80000000; @@ -264,48 +246,27 @@ static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info *vm_info) { guest_state->g_pat = 0x7040600070406ULL; } +} - if (vm_info->msr_map.num_hooks > 0) { - PrintDebug("Hooking %d msrs\n", vm_info->msr_map.num_hooks); - ctrl_area->MSRPM_BASE_PA = v3_init_svm_msr_map(vm_info); - ctrl_area->instrs.MSR_PROT = 1; - } - /* Safety locations for fs/gs */ - // vm_info->fs = 0; - // vm_info->gs = 0; -} +static int init_svm_guest(struct guest_info * info, struct v3_vm_config * config_ptr) { + + v3_pre_config_guest(info, config_ptr); -static int init_svm_guest(struct guest_info *info) { PrintDebug("Allocating VMCB\n"); info->vmm_data = (void*)Allocate_VMCB(); PrintDebug("Initializing VMCB (addr=%p)\n", (void *)info->vmm_data); Init_VMCB_BIOS((vmcb_t*)(info->vmm_data), info); - - info->run_state = VM_STOPPED; + v3_post_config_guest(info, config_ptr); - // info->rip = 0; - - info->vm_regs.rdi = 0; - info->vm_regs.rsi = 0; - info->vm_regs.rbp = 0; - info->vm_regs.rsp = 0; - info->vm_regs.rbx = 0; - info->vm_regs.rdx = 0; - info->vm_regs.rcx = 0; - info->vm_regs.rax = 0; - return 0; } - - -// can we start a kernel thread here... static int start_svm_guest(struct guest_info *info) { - vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data)); + // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data)); // vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data)); uint_t num_exits = 0; @@ -315,30 +276,14 @@ static int start_svm_guest(struct guest_info *info) { //PrintDebugVMCB((vmcb_t*)(info->vmm_data)); info->run_state = VM_RUNNING; - + rdtscll(info->yield_start_cycle); + + while (1) { ullong_t tmp_tsc; - - -#define MSR_STAR 0xc0000081 -#define MSR_LSTAR 0xc0000082 -#define MSR_CSTAR 0xc0000083 -#define MSR_SF_MASK 0xc0000084 -#define MSR_GS_BASE 0xc0000101 -#define MSR_KERNGS_BASE 0xc0000102 - - - struct v3_msr host_cstar; - struct v3_msr host_star; - struct v3_msr host_lstar; - struct v3_msr host_syscall_mask; - struct v3_msr host_gs_base; - struct v3_msr host_kerngs_base; - -/* v3_enable_ints(); */ -/* v3_clgi(); */ - + // Conditionally yield the CPU if the timeslice has expired + v3_yield_cond(info); /* PrintDebug("SVM Entry to CS=%p rip=%p...\n", @@ -346,51 +291,36 @@ static int start_svm_guest(struct guest_info *info) { (void *)(addr_t)info->rip); */ + // disable global interrupts for vm state transition + v3_clgi(); - v3_get_msr(MSR_STAR, &(host_star.hi), &(host_star.lo)); - v3_get_msr(MSR_LSTAR, &(host_lstar.hi), &(host_lstar.lo)); - v3_get_msr(MSR_CSTAR, &(host_cstar.hi), &(host_cstar.lo)); - v3_get_msr(MSR_SF_MASK, &(host_syscall_mask.hi), &(host_syscall_mask.lo)); - v3_get_msr(MSR_GS_BASE, &(host_gs_base.hi), &(host_gs_base.lo)); - v3_get_msr(MSR_KERNGS_BASE, &(host_kerngs_base.hi), &(host_kerngs_base.lo)); rdtscll(info->time_state.cached_host_tsc); // guest_ctrl->TSC_OFFSET = info->time_state.guest_tsc - info->time_state.cached_host_tsc; - //v3_svm_launch((vmcb_t*)V3_PAddr(info->vmm_data), &(info->vm_regs), &(info->fs), &(info->gs)); - v3_svm_launch((vmcb_t*)V3_PAddr(info->vmm_data), &(info->vm_regs)); + v3_svm_launch((vmcb_t*)V3_PAddr(info->vmm_data), &(info->vm_regs), (vmcb_t *)host_vmcb); rdtscll(tmp_tsc); - - v3_set_msr(MSR_STAR, host_star.hi, host_star.lo); - v3_set_msr(MSR_LSTAR, host_lstar.hi, host_lstar.lo); - v3_set_msr(MSR_CSTAR, host_cstar.hi, host_cstar.lo); - v3_set_msr(MSR_SF_MASK, host_syscall_mask.hi, host_syscall_mask.lo); - v3_set_msr(MSR_GS_BASE, host_gs_base.hi, host_gs_base.lo); - v3_set_msr(MSR_KERNGS_BASE, host_kerngs_base.hi, host_kerngs_base.lo); + //PrintDebug("SVM Returned\n"); + // reenable global interrupts after vm exit + v3_stgi(); + + + // Conditionally yield the CPU if the timeslice has expired + v3_yield_cond(info); v3_update_time(info, tmp_tsc - info->time_state.cached_host_tsc); num_exits++; - - //PrintDebug("Turning on global interrupts\n"); - v3_stgi(); - v3_clgi(); if ((num_exits % 5000) == 0) { PrintDebug("SVM Exit number %d\n", num_exits); - - if (info->enable_profiler) { - v3_print_profile(info); - } } - - if (v3_handle_svm_exit(info) != 0) { vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data)); addr_t host_addr; @@ -400,23 +330,7 @@ static int start_svm_guest(struct guest_info *info) { PrintDebug("SVM ERROR!!\n"); - PrintDebug("RIP: %p\n", (void *)(addr_t)(guest_state->rip)); - - - linear_addr = get_addr_linear(info, guest_state->rip, &(info->segments.cs)); - - - PrintDebug("RIP Linear: %p\n", (void *)linear_addr); - v3_print_segments(info); - v3_print_ctrl_regs(info); - if (info->shdw_pg_mode == SHADOW_PAGING) { - PrintDebug("Shadow Paging Guest Registers:\n"); - PrintDebug("\tGuest CR0=%p\n", (void *)(addr_t)(info->shdw_pg_state.guest_cr0)); - PrintDebug("\tGuest CR3=%p\n", (void *)(addr_t)(info->shdw_pg_state.guest_cr3)); - // efer - // CR4 - } - v3_print_GPRs(info); + v3_print_guest_state(info); PrintDebug("SVM Exit Code: %p\n", (void *)(addr_t)guest_ctrl->exit_code); @@ -426,17 +340,18 @@ static int start_svm_guest(struct guest_info *info) { PrintDebug("exit_info2 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info2)); PrintDebug("exit_info2 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info2)) + 4)); + linear_addr = get_addr_linear(info, info->rip, &(info->segments.cs)); + if (info->mem_mode == PHYSICAL_MEM) { guest_pa_to_host_va(info, linear_addr, &host_addr); } else if (info->mem_mode == VIRTUAL_MEM) { guest_va_to_host_va(info, linear_addr, &host_addr); } - PrintDebug("Host Address of rip = 0x%p\n", (void *)host_addr); PrintDebug("Instr (15 bytes) at %p:\n", (void *)host_addr); - PrintTraceMemDump((uchar_t *)host_addr, 15); + v3_dump_mem((uint8_t *)host_addr, 15); break; } @@ -455,11 +370,11 @@ int v3_is_svm_capable() { uint_t vm_cr_low = 0, vm_cr_high = 0; addr_t eax = 0, ebx = 0, ecx = 0, edx = 0; - v3_cpuid(CPUID_FEATURE_IDS, &eax, &ebx, &ecx, &edx); + v3_cpuid(CPUID_EXT_FEATURE_IDS, &eax, &ebx, &ecx, &edx); - PrintDebug("CPUID_FEATURE_IDS_ecx=%p\n", (void *)ecx); + PrintDebug("CPUID_EXT_FEATURE_IDS_ecx=%p\n", (void *)ecx); - if ((ecx & CPUID_FEATURE_IDS_ecx_svm_avail) == 0) { + if ((ecx & CPUID_EXT_FEATURE_IDS_ecx_svm_avail) == 0) { PrintDebug("SVM Not Available\n"); return 0; } else { @@ -472,7 +387,7 @@ int v3_is_svm_capable() { v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx); - PrintDebug("CPUID_FEATURE_IDS_edx=%p\n", (void *)edx); + PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=%p\n", (void *)edx); if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_svml) == 0) { PrintDebug("SVM BIOS Disabled, not unlockable\n"); @@ -485,10 +400,10 @@ int v3_is_svm_capable() { PrintDebug("SVM is available and enabled.\n"); v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx); - PrintDebug("CPUID_FEATURE_IDS_eax=%p\n", (void *)eax); - PrintDebug("CPUID_FEATURE_IDS_ebx=%p\n", (void *)ebx); - PrintDebug("CPUID_FEATURE_IDS_ecx=%p\n", (void *)ecx); - PrintDebug("CPUID_FEATURE_IDS_edx=%p\n", (void *)edx); + PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_eax=%p\n", (void *)eax); + PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ebx=%p\n", (void *)ebx); + PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ecx=%p\n", (void *)ecx); + PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=%p\n", (void *)edx); if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_np) == 0) { @@ -507,7 +422,7 @@ static int has_svm_nested_paging() { v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx); - //PrintDebug("CPUID_FEATURE_IDS_edx=0x%x\n", edx); + //PrintDebug("CPUID_EXT_FEATURE_IDS_edx=0x%x\n", edx); if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_np) == 0) { PrintDebug("SVM Nested Paging not supported\n"); @@ -522,7 +437,6 @@ static int has_svm_nested_paging() { void v3_init_SVM(struct v3_ctrl_ops * vmm_ops) { reg_ex_t msr; - void * host_state; extern v3_cpu_arch_t v3_cpu_type; // Enable SVM on the CPU @@ -532,19 +446,20 @@ void v3_init_SVM(struct v3_ctrl_ops * vmm_ops) { PrintDebug("SVM Enabled\n"); - // Setup the host state save area - host_state = V3_AllocPages(4); - + host_vmcb = V3_AllocPages(4); /* 64-BIT-ISSUE */ // msr.e_reg.high = 0; - //msr.e_reg.low = (uint_t)host_state; - msr.r_reg = (addr_t)host_state; + //msr.e_reg.low = (uint_t)host_vmcb; + msr.r_reg = (addr_t)host_vmcb; - PrintDebug("Host State being saved at %p\n", (void *)(addr_t)host_state); + PrintDebug("Host State being saved at %p\n", (void *)(addr_t)host_vmcb); v3_set_msr(SVM_VM_HSAVE_PA_MSR, msr.e_reg.high, msr.e_reg.low); + + + if (has_svm_nested_paging() == 1) { v3_cpu_type = V3_SVM_REV3_CPU; } else { @@ -610,126 +525,63 @@ void v3_init_SVM(struct v3_ctrl_ops * vmm_ops) { -/*static void Init_VMCB(vmcb_t * vmcb, struct guest_info vm_info) { - vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb); - vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA(vmcb); - uint_t i; - - - guest_state->rsp = vm_info.vm_regs.rsp; - guest_state->rip = vm_info.rip; - - - //ctrl_area->instrs.instrs.CR0 = 1; - ctrl_area->cr_reads.cr0 = 1; - ctrl_area->cr_writes.cr0 = 1; - - guest_state->efer |= EFER_MSR_svm_enable; - guest_state->rflags = 0x00000002; // The reserved bit is always 1 - ctrl_area->svm_instrs.VMRUN = 1; - // guest_state->cr0 = 0x00000001; // PE - ctrl_area->guest_ASID = 1; - - - ctrl_area->exceptions.de = 1; - ctrl_area->exceptions.df = 1; - ctrl_area->exceptions.pf = 1; - ctrl_area->exceptions.ts = 1; - ctrl_area->exceptions.ss = 1; - ctrl_area->exceptions.ac = 1; - ctrl_area->exceptions.mc = 1; - ctrl_area->exceptions.gp = 1; - ctrl_area->exceptions.ud = 1; - ctrl_area->exceptions.np = 1; - ctrl_area->exceptions.of = 1; - ctrl_area->exceptions.nmi = 1; - - guest_state->cs.selector = 0x0000; - guest_state->cs.limit=~0u; - guest_state->cs.base = guest_state->cs.selector<<4; - guest_state->cs.attrib.raw = 0xf3; - - - struct vmcb_selector *segregs [] = {&(guest_state->ss), &(guest_state->ds), &(guest_state->es), &(guest_state->fs), &(guest_state->gs), NULL}; - for ( i = 0; segregs[i] != NULL; i++) { - struct vmcb_selector * seg = segregs[i]; +#if 0 +/* + * Test VMSAVE/VMLOAD Latency + */ +#define vmsave ".byte 0x0F,0x01,0xDB ; " +#define vmload ".byte 0x0F,0x01,0xDA ; " +{ + uint32_t start_lo, start_hi; + uint32_t end_lo, end_hi; + uint64_t start, end; - seg->selector = 0x0000; - seg->base = seg->selector << 4; - seg->attrib.raw = 0xf3; - seg->limit = ~0u; - } - - if (vm_info.io_map.num_ports > 0) { - struct vmm_io_hook * iter; - addr_t io_port_bitmap; + __asm__ __volatile__ ( + "rdtsc ; " + "movl %%eax, %%esi ; " + "movl %%edx, %%edi ; " + "movq %%rcx, %%rax ; " + vmsave + "rdtsc ; " + : "=D"(start_hi), "=S"(start_lo), "=a"(end_lo),"=d"(end_hi) + : "c"(host_vmcb), "0"(0), "1"(0), "2"(0), "3"(0) + ); + + start = start_hi; + start <<= 32; + start += start_lo; + + end = end_hi; + end <<= 32; + end += end_lo; - io_port_bitmap = (addr_t)V3_AllocPages(3); - memset((uchar_t*)io_port_bitmap, 0, PAGE_SIZE * 3); + PrintDebug("VMSave Cycle Latency: %d\n", (uint32_t)(end - start)); - ctrl_area->IOPM_BASE_PA = io_port_bitmap; + __asm__ __volatile__ ( + "rdtsc ; " + "movl %%eax, %%esi ; " + "movl %%edx, %%edi ; " + "movq %%rcx, %%rax ; " + vmload + "rdtsc ; " + : "=D"(start_hi), "=S"(start_lo), "=a"(end_lo),"=d"(end_hi) + : "c"(host_vmcb), "0"(0), "1"(0), "2"(0), "3"(0) + ); + + start = start_hi; + start <<= 32; + start += start_lo; - //PrintDebug("Setting up IO Map at 0x%x\n", io_port_bitmap); + end = end_hi; + end <<= 32; + end += end_lo; - FOREACH_IO_HOOK(vm_info.io_map, iter) { - ushort_t port = iter->port; - uchar_t * bitmap = (uchar_t *)io_port_bitmap; - bitmap += (port / 8); - PrintDebug("Setting Bit in block %x\n", bitmap); - *bitmap |= 1 << (port % 8); + PrintDebug("VMLoad Cycle Latency: %d\n", (uint32_t)(end - start)); } + /* End Latency Test */ - - //PrintDebugMemDump((uchar_t*)io_port_bitmap, PAGE_SIZE *2); - - ctrl_area->instrs.IOIO_PROT = 1; - } - - ctrl_area->instrs.INTR = 1; - - - - if (vm_info.page_mode == SHADOW_PAGING) { - PrintDebug("Creating initial shadow page table\n"); - vm_info.shdw_pg_state.shadow_cr3 |= ((addr_t)create_passthrough_pts_32(&vm_info) & ~0xfff); - PrintDebug("Created\n"); - - guest_state->cr3 = vm_info.shdw_pg_state.shadow_cr3; - - ctrl_area->cr_reads.cr3 = 1; - ctrl_area->cr_writes.cr3 = 1; - - - ctrl_area->instrs.INVLPG = 1; - ctrl_area->instrs.INVLPGA = 1; - - guest_state->g_pat = 0x7040600070406ULL; - - guest_state->cr0 |= 0x80000000; - } else if (vm_info.page_mode == NESTED_PAGING) { - // Flush the TLB on entries/exits - //ctrl_area->TLB_CONTROL = 1; - - // Enable Nested Paging - //ctrl_area->NP_ENABLE = 1; - - //PrintDebug("NP_Enable at 0x%x\n", &(ctrl_area->NP_ENABLE)); - - // Set the Nested Page Table pointer - // ctrl_area->N_CR3 = ((addr_t)vm_info.page_tables); - // ctrl_area->N_CR3 = (addr_t)(vm_info.page_tables); - - // ctrl_area->N_CR3 = Get_CR3(); - // guest_state->cr3 |= (Get_CR3() & 0xfffff000); - - // guest_state->g_pat = 0x7040600070406ULL; - } - - - -} -*/ +#endif