X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fgeekos%2Fsvm.c;h=4ba49b2176bc1b44e0a399f26edf2204744f0f96;hb=190b2ef9470c23c275754b74745933d973f8c439;hp=ae901bb06f24d35a9cce5404b3e7724ec37c370f;hpb=4d691866d964c028d2b2ca96c2d16489d45dd2b5;p=palacios.releases.git

diff --git a/palacios/src/geekos/svm.c b/palacios/src/geekos/svm.c
index ae901bb..4ba49b2 100644
--- a/palacios/src/geekos/svm.c
+++ b/palacios/src/geekos/svm.c
@@ -1,15 +1,201 @@
 #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);
+
+
+/* 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_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) {
+  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("Initializing VMCB (addr=%x)\n", info->vmm_data);
+  Init_VMCB((vmcb_t*)(info->vmm_data), *info);
+
+
+  
 
-void Init_SVM() {
+  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);
+
+  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); 
+
+
+  exit_code = guest_ctrl->exit_code;
+
+  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;
+}
 
-  uint_t ret =  cpuid_ecx(CPUID_ECX_FEATURE_IDS);
 
-  if (ret & CPUID_SVM_AVAIL) {
-    PrintBoth("SVM Available\n");
+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->cr0 = 0x00000001;    // PE 
+  guest_state->rflags = 0x00000002; // The reserved bit is always 1
+  ctrl_area->svm_instrs.instrs.VMRUN = 1;
+  ctrl_area->guest_ASID = 1;
+
+
+
+  /* ** */
+
 }
+
+