#include <geekos/svm.h>
+#include <geekos/vmm.h>
+#include <geekos/vmcb.h>
+#include <geekos/vmm_mem.h>
+#include <geekos/vmm_paging.h>
+
+
+extern struct vmm_os_hooks * os_hooks;
extern uint_t cpuid_ecx(uint_t op);
+extern uint_t cpuid_edx(uint_t op);
+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 uint_t Get_CR3();
+
+extern void GetGDTR(void * gdt);
+extern void GetIDTR(void * idt);
+
+
+/* Checks machine SVM capability */
+/* Implemented from: AMD Arch Manual 3, sect 15.4 */
+int is_svm_capable() {
+ uint_t ret = cpuid_ecx(CPUID_FEATURE_IDS);
+ uint_t vm_cr_low = 0, vm_cr_high = 0;
+
+
+ if ((ret & CPUID_FEATURE_IDS_ecx_svm_avail) == 0) {
+ PrintDebug("SVM Not Available\n");
+ return 0;
+ }
+
+ Get_MSR(SVM_VM_CR_MSR, &vm_cr_high, &vm_cr_low);
+
+ 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_np) == 0) {
+ PrintDebug("Nested Paging not supported\n");
+ }
+
+ if ((ret & 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;
+}
+
+
+
+void Init_SVM(struct vmm_ctrl_ops * vmm_ops) {
+ reg_ex_t msr;
+ void * host_state;
+
+
+ // Enable SVM on the CPU
+ Get_MSR(EFER_MSR, &(msr.e_reg.high), &(msr.e_reg.low));
+ msr.e_reg.low |= EFER_MSR_svm_enable;
+ Set_MSR(EFER_MSR, 0, msr.e_reg.low);
+
+ PrintDebug("SVM Enabled\n");
+
+
+ // Setup the host state save area
+ host_state = os_hooks->allocate_pages(1);
+
+ msr.e_reg.high = 0;
+ msr.e_reg.low = (uint_t)host_state;
+
+
+ PrintDebug("Host State being saved at %x\n", (uint_t)host_state);
+ Set_MSR(SVM_VM_HSAVE_PA_MSR, msr.e_reg.high, msr.e_reg.low);
+
+
+
+ // Setup the SVM specific vmm operations
+ vmm_ops->init_guest = &init_svm_guest;
+ vmm_ops->start_guest = &start_svm_guest;
+
+
+ return;
+}
+
+
+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");
+ print_mem_list(&(info->mem_list));
+ print_mem_layout(&(info->mem_layout));
+ info->page_tables = generate_guest_page_tables_64(&(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);
+
+
+
+
+ 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));
+
+ guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
+
+
+ PrintDebug("SVM Returned: (Exit Code=%x) (VMCB=%x)\n",&(guest_ctrl->exit_code), info->vmm_data);
-void Init_SVM() {
- uint_t ret = cpuid_ecx(CPUID_ECX_FEATURE_IDS);
+ exit_code = guest_ctrl->exit_code;
- if (ret & CPUID_SVM_AVAIL) {
- PrintBoth("SVM Available\n");
+ PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
+
+ return 0;
+}
+
+
+
+/**
+ * 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;
+}
+
+
+vmcb_t * Allocate_VMCB() {
+ vmcb_t * vmcb_page = (vmcb_t*)os_hooks->allocate_pages(1);
+
+
+ memset(vmcb_page, 0, 4096);
+
+ return vmcb_page;
+}
+
+
+
+void Init_VMCB(vmcb_t *vmcb, guest_info_t 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->rip = vm_info.rip;
+
+
+ /* I pretty much just gutted this from TVMM */
+ /* Note: That means its probably wrong */
+
+ // set the segment registers to mirror ours
+ guest_state->cs.selector = 0;
+ 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.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->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->base = 0;
+ }
+
+ /* ** */
+
+
+ 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;
+
+
+ // guest_state->cpl = 3;
+
+
+
+
+
+ // Setup exits
+
+
+ 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;
+
+ /*
+ {
+ reg_ex_t gdt;
+ reg_ex_t idt;
+
+ GetGDTR(&(gdt.r_reg));
+ PrintDebug("GDT: hi: %x, lo: %x\n", gdt.e_reg.high, gdt.e_reg.low);
+
+ GetIDTR(&(idt.r_reg));
+
+ }
+ */
+
+ // 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;
}
}
+
+
