X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fsvm.c;h=4b01c8bfbe4220e1fdbd71c2c4a22e7de300908a;hp=d533c9276b64c3ce15a1b666627be2a3af133d4a;hb=888c2dd8a3914f9a08e2b0e006ff96c5cc5cd792;hpb=32694d99c15e00731a240e0fccea252e08bf5ada diff --git a/palacios/src/palacios/svm.c b/palacios/src/palacios/svm.c index d533c92..4b01c8b 100644 --- a/palacios/src/palacios/svm.c +++ b/palacios/src/palacios/svm.c @@ -18,9 +18,6 @@ */ - - - #include #include @@ -35,536 +32,676 @@ #include #include #include +#include +#include - -extern void v3_stgi(); -extern void v3_clgi(); -extern int v3_svm_launch(vmcb_t * vmcb, struct v3_gprs * vm_regs); - - - - -static vmcb_t * Allocate_VMCB() { - vmcb_t * vmcb_page = (vmcb_t *)V3_VAddr(V3_AllocPages(1)); - - memset(vmcb_page, 0, 4096); - - return vmcb_page; -} - - +#include #include +#include -static void Init_VMCB_BIOS(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; +#include - guest_state->rsp = vm_info->vm_regs.rsp; - // guest_state->rip = vm_info->rip; - guest_state->rip = 0xfff0; +uint32_t v3_last_exit; - guest_state->cpl = 0; +// This is a global pointer to the host's VMCB +static addr_t host_vmcbs[CONFIG_MAX_CPUS] = { [0 ... CONFIG_MAX_CPUS - 1] = 0}; - //ctrl_area->instrs.instrs.CR0 = 1; - ctrl_area->cr_reads.cr0 = 1; - ctrl_area->cr_writes.cr0 = 1; - /* Set up the efer to enable 64 bit page tables */ - /* - { - struct efer_64 * efer = (struct efer_64 *)&(guest_state->efer); - struct cr4_32 * cr4 = (struct cr4_32 *)&(guest_state->cr4); - efer->lma = 1; - efer->lme = 1; +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, vmcb_t * host_vmcb); - cr4->pae = 1; - } - */ - guest_state->efer |= EFER_MSR_svm_enable; +static vmcb_t * Allocate_VMCB() { + vmcb_t * vmcb_page = (vmcb_t *)V3_VAddr(V3_AllocPages(1)); + memset(vmcb_page, 0, 4096); + return vmcb_page; +} - guest_state->rflags = 0x00000002; // The reserved bit is always 1 - ctrl_area->svm_instrs.VMRUN = 1; - ctrl_area->svm_instrs.VMMCALL = 1; - ctrl_area->svm_instrs.VMLOAD = 1; - ctrl_area->svm_instrs.VMSAVE = 1; - ctrl_area->svm_instrs.STGI = 1; - ctrl_area->svm_instrs.CLGI = 1; - ctrl_area->svm_instrs.SKINIT = 1; - ctrl_area->svm_instrs.RDTSCP = 1; - ctrl_area->svm_instrs.ICEBP = 1; - ctrl_area->svm_instrs.WBINVD = 1; - ctrl_area->svm_instrs.MONITOR = 1; - ctrl_area->svm_instrs.MWAIT_always = 1; - ctrl_area->svm_instrs.MWAIT_if_armed = 1; - - - ctrl_area->instrs.HLT = 1; - // guest_state->cr0 = 0x00000001; // PE - ctrl_area->guest_ASID = 1; - - /* - ctrl_area->exceptions.de = 1; - ctrl_area->exceptions.df = 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; - */ - // Debug of boot on physical machines - 7/14/08 - ctrl_area->instrs.NMI=1; - ctrl_area->instrs.SMI=1; - ctrl_area->instrs.INIT=1; - ctrl_area->instrs.PAUSE=1; - ctrl_area->instrs.shutdown_evts=1; +static void Init_VMCB_BIOS(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; - vm_info->vm_regs.rdx = 0x00000f00; + // - guest_state->cr0 = 0x60000010; - guest_state->cs.selector = 0xf000; - guest_state->cs.limit=0xffff; - guest_state->cs.base = 0x0000000f0000LL; - guest_state->cs.attrib.raw = 0xf3; + ctrl_area->svm_instrs.VMRUN = 1; + ctrl_area->svm_instrs.VMMCALL = 1; + ctrl_area->svm_instrs.VMLOAD = 1; + ctrl_area->svm_instrs.VMSAVE = 1; + ctrl_area->svm_instrs.STGI = 1; + ctrl_area->svm_instrs.CLGI = 1; + ctrl_area->svm_instrs.SKINIT = 1; + ctrl_area->svm_instrs.RDTSCP = 1; + ctrl_area->svm_instrs.ICEBP = 1; + ctrl_area->svm_instrs.WBINVD = 1; + ctrl_area->svm_instrs.MONITOR = 1; + ctrl_area->svm_instrs.MWAIT_always = 1; + ctrl_area->svm_instrs.MWAIT_if_armed = 1; + ctrl_area->instrs.INVLPGA = 1; + ctrl_area->instrs.CPUID = 1; + ctrl_area->instrs.HLT = 1; + // guest_state->cr0 = 0x00000001; // PE - /* DEBUG FOR RETURN CODE */ - ctrl_area->exit_code = 1; - - - 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]; + /* + ctrl_area->exceptions.de = 1; + ctrl_area->exceptions.df = 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; + */ - seg->selector = 0x0000; - // seg->base = seg->selector << 4; - seg->base = 0x00000000; - seg->attrib.raw = 0xf3; - seg->limit = ~0u; - } - - guest_state->gdtr.limit = 0x0000ffff; - guest_state->gdtr.base = 0x0000000000000000LL; - guest_state->idtr.limit = 0x0000ffff; - guest_state->idtr.base = 0x0000000000000000LL; - guest_state->ldtr.selector = 0x0000; - guest_state->ldtr.limit = 0x0000ffff; - guest_state->ldtr.base = 0x0000000000000000LL; - guest_state->tr.selector = 0x0000; - guest_state->tr.limit = 0x0000ffff; - guest_state->tr.base = 0x0000000000000000LL; + ctrl_area->instrs.NMI = 1; + ctrl_area->instrs.SMI = 1; + ctrl_area->instrs.INIT = 1; + ctrl_area->instrs.PAUSE = 1; + ctrl_area->instrs.shutdown_evts = 1; - guest_state->dr6 = 0x00000000ffff0ff0LL; - guest_state->dr7 = 0x0000000000000400LL; + /* DEBUG FOR RETURN CODE */ + ctrl_area->exit_code = 1; - if (vm_info->io_map.num_ports > 0) { - struct vmm_io_hook * iter; - addr_t io_port_bitmap; - - 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); + /* Setup Guest Machine state */ - 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 for port 0x%x\n", port); - *bitmap |= 1 << (port % 8); - } + vm_info->vm_regs.rsp = 0x00; + vm_info->rip = 0xfff0; + vm_info->vm_regs.rdx = 0x00000f00; - //PrintDebugMemDump((uchar_t*)io_port_bitmap, PAGE_SIZE *2); - ctrl_area->instrs.IOIO_PROT = 1; - } + vm_info->cpl = 0; + vm_info->ctrl_regs.rflags = 0x00000002; // The reserved bit is always 1 + vm_info->ctrl_regs.cr0 = 0x60010010; // Set the WP flag so the memory hooks work in real-mode + vm_info->ctrl_regs.efer |= EFER_MSR_svm_enable; - PrintDebug("Exiting on interrupts\n"); - ctrl_area->guest_ctrl.V_INTR_MASKING = 1; - ctrl_area->instrs.INTR = 1; - if (vm_info->shdw_pg_mode == SHADOW_PAGING) { - PrintDebug("Creating initial shadow page table\n"); + vm_info->segments.cs.selector = 0xf000; + vm_info->segments.cs.limit = 0xffff; + vm_info->segments.cs.base = 0x0000000f0000LL; + // (raw attributes = 0xf3) + vm_info->segments.cs.type = 0x3; + vm_info->segments.cs.system = 0x1; + vm_info->segments.cs.dpl = 0x3; + vm_info->segments.cs.present = 1; - /* Testing 64 bit page tables for long paged real mode guests */ - // vm_info->direct_map_pt = (addr_t)V3_PAddr(create_passthrough_pts_64(vm_info)); - vm_info->direct_map_pt = (addr_t)V3_PAddr(create_passthrough_pts_32(vm_info)); - /* End Test */ - //vm_info->shdw_pg_state.shadow_cr3 |= (vm_info->direct_map_pt & ~0xfff); - vm_info->shdw_pg_state.shadow_cr3 = 0; - vm_info->shdw_pg_state.guest_cr0 = 0x0000000000000010LL; - PrintDebug("Created\n"); - //guest_state->cr3 = vm_info->shdw_pg_state.shadow_cr3; + struct v3_segment * segregs [] = {&(vm_info->segments.ss), &(vm_info->segments.ds), + &(vm_info->segments.es), &(vm_info->segments.fs), + &(vm_info->segments.gs), NULL}; - guest_state->cr3 = vm_info->direct_map_pt; + for ( i = 0; segregs[i] != NULL; i++) { + struct v3_segment * seg = segregs[i]; + + seg->selector = 0x0000; + // seg->base = seg->selector << 4; + seg->base = 0x00000000; + seg->limit = ~0u; + // (raw attributes = 0xf3) + seg->type = 0x3; + seg->system = 0x1; + seg->dpl = 0x3; + seg->present = 1; + } - //PrintDebugPageTables((pde32_t*)(vm_info->shdw_pg_state.shadow_cr3.e_reg.low)); + vm_info->segments.gdtr.limit = 0x0000ffff; + vm_info->segments.gdtr.base = 0x0000000000000000LL; + vm_info->segments.idtr.limit = 0x0000ffff; + vm_info->segments.idtr.base = 0x0000000000000000LL; - ctrl_area->cr_reads.cr3 = 1; - ctrl_area->cr_writes.cr3 = 1; + vm_info->segments.ldtr.selector = 0x0000; + vm_info->segments.ldtr.limit = 0x0000ffff; + vm_info->segments.ldtr.base = 0x0000000000000000LL; + vm_info->segments.tr.selector = 0x0000; + vm_info->segments.tr.limit = 0x0000ffff; + vm_info->segments.tr.base = 0x0000000000000000LL; - ctrl_area->instrs.INVLPG = 1; - ctrl_area->instrs.INVLPGA = 1; + vm_info->dbg_regs.dr6 = 0x00000000ffff0ff0LL; + vm_info->dbg_regs.dr7 = 0x0000000000000400LL; - 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; - + 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; - guest_state->g_pat = 0x7040600070406ULL; + 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; - guest_state->cr0 |= 0x80000000; - } else if (vm_info->shdw_pg_mode == NESTED_PAGING) { - // Flush the TLB on entries/exits - ctrl_area->TLB_CONTROL = 1; + PrintDebug("Exiting on interrupts\n"); + ctrl_area->guest_ctrl.V_INTR_MASKING = 1; + ctrl_area->instrs.INTR = 1; - // Enable Nested Paging - ctrl_area->NP_ENABLE = 1; - PrintDebug("NP_Enable at 0x%p\n", (void *)&(ctrl_area->NP_ENABLE)); + 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; + + + if (v3_init_passthrough_pts(vm_info) == -1) { + PrintError("Could not initialize passthrough page tables\n"); + return ; + } - // Set the Nested Page Table pointer - vm_info->direct_map_pt = ((addr_t)create_passthrough_pts_32(vm_info) & ~0xfff); - ctrl_area->N_CR3 = vm_info->direct_map_pt; - // ctrl_area->N_CR3 = Get_CR3(); - // guest_state->cr3 |= (Get_CR3() & 0xfffff000); + vm_info->shdw_pg_state.guest_cr0 = 0x0000000000000010LL; + PrintDebug("Created\n"); + + vm_info->ctrl_regs.cr0 |= 0x80000000; + vm_info->ctrl_regs.cr3 = vm_info->direct_map_pt; - guest_state->g_pat = 0x7040600070406ULL; - } + ctrl_area->cr_reads.cr0 = 1; + ctrl_area->cr_writes.cr0 = 1; + //ctrl_area->cr_reads.cr4 = 1; + ctrl_area->cr_writes.cr4 = 1; + ctrl_area->cr_reads.cr3 = 1; + ctrl_area->cr_writes.cr3 = 1; + v3_hook_msr(vm_info, EFER_MSR, + &v3_handle_efer_read, + &v3_handle_efer_write, + vm_info); + ctrl_area->instrs.INVLPG = 1; -} + ctrl_area->exceptions.pf = 1; + guest_state->g_pat = 0x7040600070406ULL; -static int init_svm_guest(struct guest_info *info) { - - PrintDebug("Allocating VMCB\n"); - info->vmm_data = (void*)Allocate_VMCB(); - //PrintDebug("Generating Guest nested page tables\n"); - // info->page_tables = NULL; - //info->page_tables = generate_guest_page_tables_64(&(info->mem_layout), &(info->mem_list)); - //info->page_tables = generate_guest_page_tables(&(info->mem_layout), &(info->mem_list)); - // PrintDebugPageTables(info->page_tables); + } else if (vm_info->shdw_pg_mode == NESTED_PAGING) { + // Flush the TLB on entries/exits + ctrl_area->TLB_CONTROL = 1; + ctrl_area->guest_ASID = 1; + // Enable Nested Paging + ctrl_area->NP_ENABLE = 1; - PrintDebug("Initializing VMCB (addr=%p)\n", (void *)info->vmm_data); - Init_VMCB_BIOS((vmcb_t*)(info->vmm_data), info); - + PrintDebug("NP_Enable at 0x%p\n", (void *)&(ctrl_area->NP_ENABLE)); - info->run_state = VM_STOPPED; + // Set the Nested Page Table pointer + if (v3_init_passthrough_pts(vm_info) == -1) { + PrintError("Could not initialize Nested page tables\n"); + return ; + } - // info->rip = 0; + ctrl_area->N_CR3 = vm_info->direct_map_pt; - 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; + guest_state->g_pat = 0x7040600070406ULL; + } } +int v3_init_svm_vmcb(struct guest_info * info, v3_vm_class_t vm_class) { -// 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_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data)); - uint_t num_exits = 0; + PrintDebug("Allocating VMCB\n"); + info->vmm_data = (void*)Allocate_VMCB(); + + if (vm_class == V3_PC_VM) { + PrintDebug("Initializing VMCB (addr=%p)\n", (void *)info->vmm_data); + Init_VMCB_BIOS((vmcb_t*)(info->vmm_data), info); + } else { + PrintError("Invalid VM class\n"); + return -1; + } + return 0; +} - PrintDebug("Launching SVM VM (vmcb=%p)\n", (void *)info->vmm_data); - //PrintDebugVMCB((vmcb_t*)(info->vmm_data)); - info->run_state = VM_RUNNING; - - while (1) { - ullong_t tmp_tsc; - uint_t vm_cr_low = 0, vm_cr_high = 0; +static int update_irq_exit_state(struct guest_info * info) { + vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data)); + if ((info->intr_state.irq_pending == 1) && (guest_ctrl->guest_ctrl.V_IRQ == 0)) { + +#ifdef CONFIG_DEBUG_INTERRUPTS + PrintDebug("INTAK cycle completed for irq %d\n", info->intr_state.irq_vector); +#endif - v3_enable_ints(); - v3_clgi(); + info->intr_state.irq_started = 1; + info->intr_state.irq_pending = 0; + v3_injecting_intr(info, info->intr_state.irq_vector, V3_EXTERNAL_IRQ); + } - //PrintDebug("SVM Entry to rip=%p...\n", (void *)info->rip); + if ((info->intr_state.irq_started == 1) && (guest_ctrl->exit_int_info.valid == 0)) { +#ifdef CONFIG_DEBUG_INTERRUPTS + PrintDebug("Interrupt %d taken by guest\n", info->intr_state.irq_vector); +#endif - v3_get_msr(0xc0000101, &vm_cr_high, &vm_cr_low); + // Interrupt was taken fully vectored + info->intr_state.irq_started = 0; - rdtscll(info->time_state.cached_host_tsc); + } else if ((info->intr_state.irq_started == 1) && (guest_ctrl->exit_int_info.valid == 1)) { +#ifdef CONFIG_DEBUG_INTERRUPTS + PrintDebug("EXIT INT INFO is set (vec=%d)\n", guest_ctrl->exit_int_info.vector); +#endif + } - guest_ctrl->TSC_OFFSET = info->time_state.guest_tsc - info->time_state.cached_host_tsc; + return 0; +} - v3_svm_launch((vmcb_t*)V3_PAddr(info->vmm_data), &(info->vm_regs)); - rdtscll(tmp_tsc); - v3_set_msr(0xc0000101, vm_cr_high, vm_cr_low); - //PrintDebug("SVM Returned\n"); +static int update_irq_entry_state(struct guest_info * info) { + vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data)); -#if PrintDebug - { - uint_t x = 0; - PrintDebug("RSP=%p\n", (void *)&x); + if (info->intr_state.irq_pending == 0) { + guest_ctrl->guest_ctrl.V_IRQ = 0; + guest_ctrl->guest_ctrl.V_INTR_VECTOR = 0; } + + if (v3_excp_pending(info)) { + uint_t excp = v3_get_excp_number(info); + + guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXCEPTION; + + if (info->excp_state.excp_error_code_valid) { + guest_ctrl->EVENTINJ.error_code = info->excp_state.excp_error_code; + guest_ctrl->EVENTINJ.ev = 1; +#ifdef CONFIG_DEBUG_INTERRUPTS + PrintDebug("Injecting exception %d with error code %x\n", excp, guest_ctrl->EVENTINJ.error_code); +#endif + } + + guest_ctrl->EVENTINJ.vector = excp; + + guest_ctrl->EVENTINJ.valid = 1; + +#ifdef CONFIG_DEBUG_INTERRUPTS + PrintDebug("<%d> Injecting Exception %d (CR2=%p) (EIP=%p)\n", + (int)info->num_exits, + guest_ctrl->EVENTINJ.vector, + (void *)(addr_t)info->ctrl_regs.cr2, + (void *)(addr_t)info->rip); #endif + v3_injecting_excp(info, excp); + } else if (info->intr_state.irq_started == 1) { +#ifdef CONFIG_DEBUG_INTERRUPTS + PrintDebug("IRQ pending from previous injection\n"); +#endif + guest_ctrl->guest_ctrl.V_IRQ = 1; + guest_ctrl->guest_ctrl.V_INTR_VECTOR = info->intr_state.irq_vector; + guest_ctrl->guest_ctrl.V_IGN_TPR = 1; + guest_ctrl->guest_ctrl.V_INTR_PRIO = 0xf; - v3_update_time(info, tmp_tsc - info->time_state.cached_host_tsc); - num_exits++; + } else { + switch (v3_intr_pending(info)) { + case V3_EXTERNAL_IRQ: { + uint32_t irq = v3_get_intr(info); + + guest_ctrl->guest_ctrl.V_IRQ = 1; + guest_ctrl->guest_ctrl.V_INTR_VECTOR = irq; + guest_ctrl->guest_ctrl.V_IGN_TPR = 1; + guest_ctrl->guest_ctrl.V_INTR_PRIO = 0xf; + +#ifdef CONFIG_DEBUG_INTERRUPTS + PrintDebug("Injecting Interrupt %d (EIP=%p)\n", + guest_ctrl->guest_ctrl.V_INTR_VECTOR, + (void *)(addr_t)info->rip); +#endif - //PrintDebug("Turning on global interrupts\n"); - v3_stgi(); + info->intr_state.irq_pending = 1; + info->intr_state.irq_vector = irq; + + break; + } + case V3_NMI: + guest_ctrl->EVENTINJ.type = SVM_INJECTION_NMI; + break; + case V3_SOFTWARE_INTR: + guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR; + break; + case V3_VIRTUAL_IRQ: + guest_ctrl->EVENTINJ.type = SVM_INJECTION_IRQ; + break; + + case V3_INVALID_INTR: + default: + break; + } + + } + return 0; +} - //PrintDebug("SVM Exit number %d\n", num_exits); +/* + * CAUTION and DANGER!!! + * + * The VMCB CANNOT(!!) be accessed outside of the clgi/stgi calls inside this function + * When exectuing a symbiotic call, the VMCB WILL be overwritten, so any dependencies + * on its contents will cause things to break. The contents at the time of the exit WILL + * change before the exit handler is executed. + */ +int v3_svm_enter(struct guest_info * info) { + vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data)); + vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data)); + ullong_t tmp_tsc; + addr_t exit_code = 0, exit_info1 = 0, exit_info2 = 0; - - if (v3_handle_svm_exit(info) != 0) { + // Conditionally yield the CPU if the timeslice has expired + v3_yield_cond(info); - addr_t host_addr; - addr_t linear_addr = 0; + // disable global interrupts for vm state transition + v3_clgi(); - info->run_state = VM_ERROR; + // Synchronize the guest state to the VMCB + guest_state->cr0 = info->ctrl_regs.cr0; + guest_state->cr2 = info->ctrl_regs.cr2; + guest_state->cr3 = info->ctrl_regs.cr3; + guest_state->cr4 = info->ctrl_regs.cr4; + guest_state->dr6 = info->dbg_regs.dr6; + guest_state->dr7 = info->dbg_regs.dr7; + guest_ctrl->guest_ctrl.V_TPR = info->ctrl_regs.cr8 & 0xff; + guest_state->rflags = info->ctrl_regs.rflags; + guest_state->efer = info->ctrl_regs.efer; + + guest_state->cpl = info->cpl; - PrintDebug("SVM ERROR!!\n"); - - PrintDebug("RIP: %p\n", (void *)(addr_t)(guest_state->rip)); + v3_set_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments)); + guest_state->rax = info->vm_regs.rax; + guest_state->rip = info->rip; + guest_state->rsp = info->vm_regs.rsp; - linear_addr = get_addr_linear(info, guest_state->rip, &(info->segments.cs)); +#ifdef CONFIG_SYMBIOTIC + if (info->sym_state.sym_call_active == 0) { + update_irq_entry_state(info); + } +#else + update_irq_entry_state(info); +#endif - PrintDebug("RIP Linear: %p\n", (void *)linear_addr); - v3_print_segments(info); - v3_print_ctrl_regs(info); - v3_print_GPRs(info); - - 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("SVM Entry to CS=%p rip=%p...\n", + (void *)(addr_t)info->segments.cs.base, + (void *)(addr_t)info->rip); + */ + +#ifdef CONFIG_SYMBIOTIC + if (info->sym_state.sym_call_active == 1) { + if (guest_ctrl->guest_ctrl.V_IRQ == 1) { + V3_Print("!!! Injecting Interrupt during Sym call !!!\n"); + } + } +#endif - 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); + 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), (vmcb_t *)host_vmcbs[info->cpu_id]); + - break; - } - } - return 0; -} + v3_last_exit = (uint32_t)(guest_ctrl->exit_code); + // v3_print_cond("SVM Returned: Exit Code: %x\n", (uint32_t)(guest_ctrl->exit_code)); + rdtscll(tmp_tsc); + //PrintDebug("SVM Returned\n"); + + info->num_exits++; + v3_update_time(info, tmp_tsc - info->time_state.cached_host_tsc); -/* Checks machine SVM capability */ -/* Implemented from: AMD Arch Manual 3, sect 15.4 */ -int v3_is_svm_capable() { -#if 1 - // Dinda - uint_t vm_cr_low = 0, vm_cr_high = 0; - addr_t eax = 0, ebx = 0, ecx = 0, edx = 0; + // Save Guest state from VMCB + info->rip = guest_state->rip; + info->vm_regs.rsp = guest_state->rsp; + info->vm_regs.rax = guest_state->rax; - v3_cpuid(CPUID_FEATURE_IDS, &eax, &ebx, &ecx, &edx); - - PrintDebug("CPUID_FEATURE_IDS_ecx=0x%p\n", (void *)ecx); + info->cpl = guest_state->cpl; - if ((ecx & CPUID_FEATURE_IDS_ecx_svm_avail) == 0) { - PrintDebug("SVM Not Available\n"); - return 0; - } else { - v3_get_msr(SVM_VM_CR_MSR, &vm_cr_high, &vm_cr_low); + info->ctrl_regs.cr0 = guest_state->cr0; + info->ctrl_regs.cr2 = guest_state->cr2; + info->ctrl_regs.cr3 = guest_state->cr3; + info->ctrl_regs.cr4 = guest_state->cr4; + info->dbg_regs.dr6 = guest_state->dr6; + info->dbg_regs.dr7 = guest_state->dr7; + info->ctrl_regs.cr8 = guest_ctrl->guest_ctrl.V_TPR; + info->ctrl_regs.rflags = guest_state->rflags; + info->ctrl_regs.efer = guest_state->efer; - PrintDebug("SVM_VM_CR_MSR = 0x%x 0x%x\n", vm_cr_high, vm_cr_low); - - if ((vm_cr_low & SVM_VM_CR_MSR_svmdis) == 1) { - PrintDebug("SVM is available but is disabled.\n"); + v3_get_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments)); + info->cpu_mode = v3_get_vm_cpu_mode(info); + info->mem_mode = v3_get_vm_mem_mode(info); + /* ** */ - v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx); - - PrintDebug("CPUID_FEATURE_IDS_edx=0x%p\n", (void *)edx); - - if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_svml) == 0) { - PrintDebug("SVM BIOS Disabled, not unlockable\n"); - } else { - PrintDebug("SVM is locked with a key\n"); - } - return 0; - } else { - PrintDebug("SVM is available and enabled.\n"); + // save exit info here + exit_code = guest_ctrl->exit_code; + exit_info1 = guest_ctrl->exit_info1; + exit_info2 = guest_ctrl->exit_info2; - v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx); - - PrintDebug("CPUID_FEATURE_IDS_edx=0x%p\n", (void *)edx); - if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_np) == 0) { - PrintDebug("SVM Nested Paging not supported\n"); - } else { - PrintDebug("SVM Nested Paging supported\n"); - } - - return 1; - +#ifdef CONFIG_SYMBIOTIC + if (info->sym_state.sym_call_active == 0) { + update_irq_exit_state(info); } - } - #else - uint_t eax = 0, ebx = 0, ecx = 0, edx = 0; - addr_t vm_cr_low = 0, vm_cr_high = 0; - - v3_cpuid(CPUID_FEATURE_IDS, &eax, &ebx, &ecx, &edx); - - if ((ecx & CPUID_FEATURE_IDS_ecx_svm_avail) == 0) { - PrintDebug("SVM Not Available\n"); - return 0; - } + update_irq_exit_state(info); +#endif - v3_get_msr(SVM_VM_CR_MSR, &vm_cr_high, &vm_cr_low); - PrintDebug("SVM_VM_CR_MSR = 0x%x 0x%x\n", vm_cr_high, vm_cr_low); + // reenable global interrupts after vm exit + v3_stgi(); + + // Conditionally yield the CPU if the timeslice has expired + v3_yield_cond(info); - // this part is clearly wrong, since the np bit is in - // edx, not ecx - if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_np) == 1) { - PrintDebug("Nested Paging not supported\n"); - } else { - PrintDebug("Nested Paging supported\n"); - } - if ((vm_cr_low & SVM_VM_CR_MSR_svmdis) == 0) { - PrintDebug("SVM is disabled.\n"); - return 1; - } + if (v3_handle_svm_exit(info, exit_code, exit_info1, exit_info2) != 0) { + PrintError("Error in SVM exit handler\n"); + return -1; + } - v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx); - if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_svml) == 0) { - PrintDebug("SVM BIOS Disabled, not unlockable\n"); - } else { - PrintDebug("SVM is locked with a key\n"); - } + return 0; +} - return 0; -#endif +int v3_start_svm_guest(struct guest_info *info) { + // 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)); -} -static int has_svm_nested_paging() { - addr_t eax = 0, ebx = 0, ecx = 0, edx = 0; - v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx); - - //PrintDebug("CPUID_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"); + PrintDebug("Launching SVM VM (vmcb=%p)\n", (void *)info->vmm_data); + //PrintDebugVMCB((vmcb_t*)(info->vmm_data)); + + info->run_state = VM_RUNNING; + rdtscll(info->yield_start_cycle); + + + while (1) { + if (v3_svm_enter(info) == -1) { + vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data)); + addr_t host_addr; + addr_t linear_addr = 0; + + info->run_state = VM_ERROR; + + V3_Print("SVM ERROR!!\n"); + + v3_print_guest_state(info); + + V3_Print("SVM Exit Code: %p\n", (void *)(addr_t)guest_ctrl->exit_code); + + V3_Print("exit_info1 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info1)); + V3_Print("exit_info1 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info1)) + 4)); + + V3_Print("exit_info2 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info2)); + V3_Print("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); + } + + V3_Print("Host Address of rip = 0x%p\n", (void *)host_addr); + + V3_Print("Instr (15 bytes) at %p:\n", (void *)host_addr); + v3_dump_mem((uint8_t *)host_addr, 15); + + v3_print_stack(info); + + break; + } + +/* + if ((info->num_exits % 5000) == 0) { + V3_Print("SVM Exit number %d\n", (uint32_t)info->num_exits); + } +*/ + + } return 0; - } else { - PrintDebug("SVM Nested Paging supported\n"); - return 1; - } - } -void v3_init_SVM(struct v3_ctrl_ops * vmm_ops) { - reg_ex_t msr; - void * host_state; - // Enable SVM on the CPU - v3_get_msr(EFER_MSR, &(msr.e_reg.high), &(msr.e_reg.low)); - msr.e_reg.low |= EFER_MSR_svm_enable; - v3_set_msr(EFER_MSR, 0, msr.e_reg.low); - - PrintDebug("SVM Enabled\n"); - +/* Checks machine SVM capability */ +/* Implemented from: AMD Arch Manual 3, sect 15.4 */ +int v3_is_svm_capable() { + uint_t vm_cr_low = 0, vm_cr_high = 0; + uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0; - // Setup the host state save area - host_state = V3_AllocPages(4); + v3_cpuid(CPUID_EXT_FEATURE_IDS, &eax, &ebx, &ecx, &edx); + PrintDebug("CPUID_EXT_FEATURE_IDS_ecx=0x%x\n", ecx); - /* 64-BIT-ISSUE */ - // msr.e_reg.high = 0; - //msr.e_reg.low = (uint_t)host_state; - msr.r_reg = (addr_t)host_state; - - PrintDebug("Host State being saved at %p\n", (void *)(addr_t)host_state); - v3_set_msr(SVM_VM_HSAVE_PA_MSR, msr.e_reg.high, msr.e_reg.low); + if ((ecx & CPUID_EXT_FEATURE_IDS_ecx_svm_avail) == 0) { + V3_Print("SVM Not Available\n"); + return 0; + } else { + v3_get_msr(SVM_VM_CR_MSR, &vm_cr_high, &vm_cr_low); + + PrintDebug("SVM_VM_CR_MSR = 0x%x 0x%x\n", vm_cr_high, vm_cr_low); + + if ((vm_cr_low & SVM_VM_CR_MSR_svmdis) == 1) { + V3_Print("SVM is available but is disabled.\n"); + + v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx); + + PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=0x%x\n", edx); + + if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_svml) == 0) { + V3_Print("SVM BIOS Disabled, not unlockable\n"); + } else { + V3_Print("SVM is locked with a key\n"); + } + return 0; + + } else { + V3_Print("SVM is available and enabled.\n"); + + v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx); + PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_eax=0x%x\n", eax); + PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ebx=0x%x\n", ebx); + PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ecx=0x%x\n", ecx); + PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=0x%x\n", edx); + + return 1; + } + } +} +static int has_svm_nested_paging() { + uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0; + v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx); - // Setup the SVM specific vmm operations - vmm_ops->init_guest = &init_svm_guest; - vmm_ops->start_guest = &start_svm_guest; - vmm_ops->has_nested_paging = &has_svm_nested_paging; + //PrintDebug("CPUID_EXT_FEATURE_IDS_edx=0x%x\n", edx); - return; + if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_np) == 0) { + V3_Print("SVM Nested Paging not supported\n"); + return 0; + } else { + V3_Print("SVM Nested Paging supported\n"); + return 1; + } } +void v3_init_svm_cpu(int cpu_id) { + reg_ex_t msr; + extern v3_cpu_arch_t v3_cpu_types[]; + // Enable SVM on the CPU + v3_get_msr(EFER_MSR, &(msr.e_reg.high), &(msr.e_reg.low)); + msr.e_reg.low |= EFER_MSR_svm_enable; + v3_set_msr(EFER_MSR, 0, msr.e_reg.low); + V3_Print("SVM Enabled\n"); + // Setup the host state save area + host_vmcbs[cpu_id] = (addr_t)V3_AllocPages(4); + /* 64-BIT-ISSUE */ + // msr.e_reg.high = 0; + //msr.e_reg.low = (uint_t)host_vmcb; + msr.r_reg = host_vmcbs[cpu_id]; + PrintDebug("Host State being saved at %p\n", (void *)host_vmcbs[cpu_id]); + v3_set_msr(SVM_VM_HSAVE_PA_MSR, msr.e_reg.high, msr.e_reg.low); + if (has_svm_nested_paging() == 1) { + v3_cpu_types[cpu_id] = V3_SVM_REV3_CPU; + } else { + v3_cpu_types[cpu_id] = V3_SVM_CPU; + } +} @@ -608,126 +745,74 @@ 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[cpu_id]), "0"(0), "1"(0), "2"(0), "3"(0) + ); - io_port_bitmap = (addr_t)V3_AllocPages(3); - memset((uchar_t*)io_port_bitmap, 0, PAGE_SIZE * 3); + start = start_hi; + start <<= 32; + start += start_lo; - ctrl_area->IOPM_BASE_PA = io_port_bitmap; - - //PrintDebug("Setting up IO Map at 0x%x\n", io_port_bitmap); - - 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); + end = end_hi; + end <<= 32; + end += end_lo; + + PrintDebug("VMSave Cycle Latency: %d\n", (uint32_t)(end - start)); + + __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[cpu_id]), "0"(0), "1"(0), "2"(0), "3"(0) + ); + + start = start_hi; + start <<= 32; + start += start_lo; + + end = end_hi; + end <<= 32; + end += end_lo; + + + 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