#include <geekos/vmcb.h>
#include <geekos/vmm_mem.h>
#include <geekos/vmm_paging.h>
+#include <geekos/svm_handler.h>
+#include <geekos/vmm_debug.h>
+#include <geekos/vm_guest_mem.h>
+
+
+/* TEMPORARY BECAUSE SVM IS WEIRD */
+#include <geekos/tss.h>
+/* ** */
extern struct vmm_os_hooks * os_hooks;
extern void Get_MSR(uint_t MSR, uint_t * high_byte, uint_t * low_byte);
extern void Set_MSR(uint_t MSR, uint_t high_byte, uint_t low_byte);
extern uint_t launch_svm(vmcb_t * vmcb_addr);
+extern void safe_svm_launch(vmcb_t * vmcb_addr, struct guest_gprs * gprs);
+
+extern uint_t Get_CR3();
+extern void GetGDTR(void * gdt);
+extern void GetIDTR(void * idt);
+
+extern void DisableInts();
/* Checks machine SVM capability */
/* Implemented from: AMD Arch Manual 3, sect 15.4 */
Get_MSR(SVM_VM_CR_MSR, &vm_cr_high, &vm_cr_low);
+ if ((ret & CPUID_SVM_REV_AND_FEATURE_IDS_edx_np) == 1) {
+ PrintDebug("Nested Paging not supported\n");
+ }
+
if ((vm_cr_low & SVM_VM_CR_MSR_svmdis) == 0) {
return 1;
}
ret = cpuid_edx(CPUID_SVM_REV_AND_FEATURE_IDS);
-
+
if ((ret & CPUID_SVM_REV_AND_FEATURE_IDS_edx_svml) == 0) {
PrintDebug("SVM BIOS Disabled, not unlockable\n");
} else {
// Setup the host state save area
- host_state = os_hooks->allocate_pages(1);
+ host_state = os_hooks->allocate_pages(4);
msr.e_reg.high = 0;
msr.e_reg.low = (uint_t)host_state;
int init_svm_guest(struct guest_info *info) {
- pde_t * pde;
-
+
PrintDebug("Allocating VMCB\n");
info->vmm_data = (void*)Allocate_VMCB();
- PrintDebug("Generating Guest nested page tables\n");
- print_mem_list(&(info->mem_list));
- print_mem_layout(&(info->mem_layout));
- pde = generate_guest_page_tables(&(info->mem_layout), &(info->mem_list));
- PrintDebugPageTables(pde);
+ //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);
PrintDebug("Initializing VMCB (addr=%x)\n", info->vmm_data);
Init_VMCB((vmcb_t*)(info->vmm_data), *info);
-
-
-
+ // 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...
int start_svm_guest(struct guest_info *info) {
- vmcb_ctrl_t * guest_ctrl = 0;
- ulong_t exit_code = 0;
+
PrintDebug("Launching SVM VM (vmcb=%x)\n", info->vmm_data);
+ //PrintDebugVMCB((vmcb_t*)(info->vmm_data));
- launch_svm((vmcb_t*)(info->vmm_data));
+ while (1) {
- guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
+ PrintDebug("SVM Launch Args (vmcb=%x), (info=%x), (vm_regs=%x)\n", info->vmm_data, &(info->vm_regs));
+ PrintDebug("Launching to RIP: %x\n", info->rip);
+ safe_svm_launch((vmcb_t*)(info->vmm_data), &(info->vm_regs));
+ //launch_svm((vmcb_t*)(info->vmm_data));
+ PrintDebug("SVM Returned\n");
+ if (handle_svm_exit(info) != 0) {
+ // handle exit code....
+ break;
+ }
+ }
+ return 0;
+}
- PrintDebug("SVM Returned: (Exit Code=%x) (VMCB=%x)\n",&(guest_ctrl->exit_code), info->vmm_data);
- exit_code = guest_ctrl->exit_code;
+vmcb_t * Allocate_VMCB() {
+ vmcb_t * vmcb_page = (vmcb_t*)os_hooks->allocate_pages(1);
- PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
- return 0;
+ memset(vmcb_page, 0, 4096);
+
+ return vmcb_page;
}
+void Init_VMCB_Real(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;
-/**
- * We handle the svm exits here
- * This function should probably be moved to another file to keep things managable....
- */
-int handle_svm_exit(struct VMM_GPRs guest_gprs) {
- return 0;
-}
+ guest_state->rsp = vm_info.vm_regs.rsp;
+ guest_state->rip = vm_info.rip;
-vmcb_t * Allocate_VMCB() {
- vmcb_t * vmcb_page = (vmcb_t*)os_hooks->allocate_pages(1);
+ guest_state->efer |= EFER_MSR_svm_enable;
+ guest_state->rflags = 0x00000002; // The reserved bit is always 1
+ ctrl_area->svm_instrs.instrs.VMRUN = 1;
+ ctrl_area->guest_ASID = 1;
+ guest_state->cr0 = 0x60000010;
+
+
+ ctrl_area->exceptions.ex_names.de = 1;
+ ctrl_area->exceptions.ex_names.df = 1;
+ ctrl_area->exceptions.ex_names.pf = 1;
+ ctrl_area->exceptions.ex_names.ts = 1;
+ ctrl_area->exceptions.ex_names.ss = 1;
+ ctrl_area->exceptions.ex_names.ac = 1;
+ ctrl_area->exceptions.ex_names.mc = 1;
+ ctrl_area->exceptions.ex_names.gp = 1;
+ ctrl_area->exceptions.ex_names.ud = 1;
+ ctrl_area->exceptions.ex_names.np = 1;
+ ctrl_area->exceptions.ex_names.of = 1;
+ ctrl_area->exceptions.ex_names.nmi = 1;
+
+ guest_state->cs.selector = 0xf000;
+ guest_state->cs.limit=0xffff;
+ guest_state->cs.base = 0xffff0000;
+ guest_state->cs.attrib.raw = 0x9a;
+
+ 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];
+
+ seg->selector = 0x0000;
+ seg->base = 0xffff0000;
+ seg->attrib.raw = 0x9b;
+ seg->limit = 0xffff;
+ }
+
+ /* Set GPRs */
+ /*
+ EDX == 0xfxx
+ EAX, EBX, ECX, ESI, EDI, EBP, ESP == 0x0
+ */
- memset(vmcb_page, 0, 4096);
+ guest_state->gdtr.base = 0;
+ guest_state->gdtr.limit = 0xffff;
+ guest_state->gdtr.attrib.raw = 0x0;
+
+ guest_state->idtr.base = 0;
+ guest_state->idtr.limit = 0xffff;
+ guest_state->idtr.attrib.raw = 0x0;
+
+ guest_state->ldtr.base = 0;
+ guest_state->ldtr.limit = 0xffff;
+ guest_state->ldtr.attrib.raw = 0x82;
+
+ guest_state->tr.base = 0;
+ guest_state->tr.limit = 0xffff;
+ guest_state->tr.attrib.raw = 0x83;
+
+
+
+
+ if (vm_info.io_map.num_ports > 0) {
+ vmm_io_hook_t * iter;
+ addr_t io_port_bitmap;
+
+ io_port_bitmap = (addr_t)os_hooks->allocate_pages(3);
+ memset((uchar_t*)io_port_bitmap, 0, PAGE_SIZE * 3);
+
+ 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);
+ }
+
+ ctrl_area->instrs.instrs.IOIO_PROT = 1;
+ }
+
+ ctrl_area->instrs.instrs.INTR = 1;
+
+ // also determine if CPU supports nested paging
+
+ if (vm_info.page_mode == SHADOW_PAGING) {
+ PrintDebug("Creating initial shadow page table\n");
+ vm_info.shdw_pg_state.shadow_cr3.e_reg.low |= ((addr_t)create_passthrough_pde32_pts(&vm_info) & ~0xfff);
+ PrintDebug("Created\n");
+
+ guest_state->cr3 = vm_info.shdw_pg_state.shadow_cr3.r_reg;
+
+ ctrl_area->cr_reads.crs.cr3 = 1;
+ ctrl_area->cr_writes.crs.cr3 = 1;
+ ctrl_area->cr_reads.crs.cr0 = 1;
+ ctrl_area->cr_writes.crs.cr0 = 1;
+
+ ctrl_area->instrs.instrs.INVLPG = 1;
+ ctrl_area->instrs.instrs.INVLPGA = 1;
+
+
+ guest_state->g_pat = 0x7040600070406ULL;
+
+ vm_info.shdw_pg_state.guest_cr0.e_reg.low = guest_state->cr0;
+ 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;
+ }
- return vmcb_page;
}
+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.crs.cr0 = 1;
+ ctrl_area->cr_writes.crs.cr0 = 1;
+
+ guest_state->efer |= EFER_MSR_svm_enable;
+ guest_state->rflags = 0x00000002; // The reserved bit is always 1
+ ctrl_area->svm_instrs.instrs.VMRUN = 1;
+ // guest_state->cr0 = 0x00000001; // PE
+ ctrl_area->guest_ASID = 1;
-void Init_VMCB(vmcb_t *vmcb, guest_info_t vm_info) {
+
+ ctrl_area->exceptions.ex_names.de = 1;
+ ctrl_area->exceptions.ex_names.df = 1;
+ ctrl_area->exceptions.ex_names.pf = 1;
+ ctrl_area->exceptions.ex_names.ts = 1;
+ ctrl_area->exceptions.ex_names.ss = 1;
+ ctrl_area->exceptions.ex_names.ac = 1;
+ ctrl_area->exceptions.ex_names.mc = 1;
+ ctrl_area->exceptions.ex_names.gp = 1;
+ ctrl_area->exceptions.ex_names.ud = 1;
+ ctrl_area->exceptions.ex_names.np = 1;
+ ctrl_area->exceptions.ex_names.of = 1;
+ ctrl_area->exceptions.ex_names.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];
+
+ seg->selector = 0x0000;
+ seg->base = seg->selector << 4;
+ seg->attrib.raw = 0xf3;
+ seg->limit = ~0u;
+ }
+
+ if (vm_info.io_map.num_ports > 0) {
+ vmm_io_hook_t * iter;
+ addr_t io_port_bitmap;
+
+ io_port_bitmap = (addr_t)os_hooks->allocate_pages(3);
+ memset((uchar_t*)io_port_bitmap, 0, PAGE_SIZE * 3);
+
+ 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);
+ }
+
+
+ //PrintDebugMemDump((uchar_t*)io_port_bitmap, PAGE_SIZE *2);
+
+ ctrl_area->instrs.instrs.IOIO_PROT = 1;
+ }
+
+ ctrl_area->instrs.instrs.INTR = 1;
+
+
+
+ if (vm_info.page_mode == SHADOW_PAGING) {
+ PrintDebug("Creating initial shadow page table\n");
+ vm_info.shdw_pg_state.shadow_cr3.e_reg.low |= ((addr_t)create_passthrough_pde32_pts(&vm_info) & ~0xfff);
+ PrintDebug("Created\n");
+
+ guest_state->cr3 = vm_info.shdw_pg_state.shadow_cr3.r_reg;
+
+ ctrl_area->cr_reads.crs.cr3 = 1;
+ ctrl_area->cr_writes.crs.cr3 = 1;
+
+
+ ctrl_area->instrs.instrs.INVLPG = 1;
+ ctrl_area->instrs.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;
+ }
+
+
+
+}
+
+void Init_VMCB_pe(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 = 0;
- guest_state->rsp = vm_info.rsp;
+ guest_state->rsp = vm_info.vm_regs.rsp;
guest_state->rip = vm_info.rip;
/* Note: That means its probably wrong */
// set the segment registers to mirror ours
- guest_state->cs.selector = 0;
+ guest_state->cs.selector = 1<<3;
guest_state->cs.attrib.fields.type = 0xa; // Code segment+read
guest_state->cs.attrib.fields.S = 1;
guest_state->cs.attrib.fields.P = 1;
guest_state->cs.attrib.fields.db = 1;
- guest_state->cs.limit = 0xffffffff;
+ guest_state->cs.attrib.fields.G = 1;
+ guest_state->cs.limit = 0xfffff;
guest_state->cs.base = 0;
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];
- seg->selector = 0;
+ seg->selector = 2<<3;
seg->attrib.fields.type = 0x2; // Data Segment+read/write
seg->attrib.fields.S = 1;
seg->attrib.fields.P = 1;
seg->attrib.fields.db = 1;
- seg->limit = 0xffffffff;
+ seg->attrib.fields.G = 1;
+ seg->limit = 0xfffff;
seg->base = 0;
}
+ {
+ /* JRL THIS HAS TO GO */
+
+ guest_state->tr.selector = GetTR_Selector();
+ guest_state->tr.attrib.fields.type = 0x9;
+ guest_state->tr.attrib.fields.P = 1;
+ guest_state->tr.limit = GetTR_Limit();
+ guest_state->tr.base = GetTR_Base();// - 0x2000;
+ /* ** */
+ }
+
+
+ /* ** */
+
+
guest_state->efer |= EFER_MSR_svm_enable;
- guest_state->cr0 = 0x00000001; // PE
guest_state->rflags = 0x00000002; // The reserved bit is always 1
ctrl_area->svm_instrs.instrs.VMRUN = 1;
+ guest_state->cr0 = 0x00000001; // PE
ctrl_area->guest_ASID = 1;
+ // guest_state->cpl = 0;
- /* ** */
+
+
+ // Setup exits
+
+ ctrl_area->cr_writes.crs.cr4 = 1;
+
+ ctrl_area->exceptions.ex_names.de = 1;
+ ctrl_area->exceptions.ex_names.df = 1;
+ ctrl_area->exceptions.ex_names.pf = 1;
+ ctrl_area->exceptions.ex_names.ts = 1;
+ ctrl_area->exceptions.ex_names.ss = 1;
+ ctrl_area->exceptions.ex_names.ac = 1;
+ ctrl_area->exceptions.ex_names.mc = 1;
+ ctrl_area->exceptions.ex_names.gp = 1;
+ ctrl_area->exceptions.ex_names.ud = 1;
+ ctrl_area->exceptions.ex_names.np = 1;
+ ctrl_area->exceptions.ex_names.of = 1;
+ ctrl_area->exceptions.ex_names.nmi = 1;
+
+
+
+ ctrl_area->instrs.instrs.IOIO_PROT = 1;
+ ctrl_area->IOPM_BASE_PA = (uint_t)os_hooks->allocate_pages(3);
+
+ {
+ reg_ex_t tmp_reg;
+ tmp_reg.r_reg = ctrl_area->IOPM_BASE_PA;
+ memset((void*)(tmp_reg.e_reg.low), 0xffffffff, PAGE_SIZE * 2);
+ }
+
+ ctrl_area->instrs.instrs.INTR = 1;
+
+
+ {
+ char gdt_buf[6];
+ char idt_buf[6];
+
+ memset(gdt_buf, 0, 6);
+ memset(idt_buf, 0, 6);
+
+
+ uint_t gdt_base, idt_base;
+ ushort_t gdt_limit, idt_limit;
+
+ GetGDTR(gdt_buf);
+ gdt_base = *(ulong_t*)((uchar_t*)gdt_buf + 2) & 0xffffffff;
+ gdt_limit = *(ushort_t*)(gdt_buf) & 0xffff;
+ PrintDebug("GDT: base: %x, limit: %x\n", gdt_base, gdt_limit);
+
+ GetIDTR(idt_buf);
+ idt_base = *(ulong_t*)(idt_buf + 2) & 0xffffffff;
+ idt_limit = *(ushort_t*)(idt_buf) & 0xffff;
+ PrintDebug("IDT: base: %x, limit: %x\n",idt_base, idt_limit);
+
+
+ // gdt_base -= 0x2000;
+ //idt_base -= 0x2000;
+
+ guest_state->gdtr.base = gdt_base;
+ guest_state->gdtr.limit = gdt_limit;
+ guest_state->idtr.base = idt_base;
+ guest_state->idtr.limit = idt_limit;
+
+
+ }
+
+
+ // also determine if CPU supports nested paging
+ /*
+ if (vm_info.page_tables) {
+ // if (0) {
+ // 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 & 0xfffff000);
+
+
+ // ctrl_area->N_CR3 = Get_CR3();
+ // guest_state->cr3 |= (Get_CR3() & 0xfffff000);
+
+ guest_state->g_pat = 0x7040600070406ULL;
+
+ PrintDebug("Set Nested CR3: lo: 0x%x hi: 0x%x\n", (uint_t)*(&(ctrl_area->N_CR3)), (uint_t)*((unsigned char *)&(ctrl_area->N_CR3) + 4));
+ PrintDebug("Set Guest CR3: lo: 0x%x hi: 0x%x\n", (uint_t)*(&(guest_state->cr3)), (uint_t)*((unsigned char *)&(guest_state->cr3) + 4));
+ // Enable Paging
+ // guest_state->cr0 |= 0x80000000;
+ }
+ */
}
