-
/*
* This file is part of the Palacios Virtual Machine Monitor developed
* by the V3VEE Project with funding from the United States National
#include <palacios/svm_msr.h>
#include <palacios/vmm_rbtree.h>
+#include <palacios/vmm_barrier.h>
+
+#ifdef V3_CONFIG_CHECKPOINT
+#include <palacios/vmm_checkpoint.h>
+#endif
#include <palacios/vmm_direct_paging.h>
}
+static int v3_svm_handle_efer_write(struct guest_info * core, uint_t msr, struct v3_msr src, void * priv_data)
+{
+ int status;
+
+ // Call arch-independent handler
+ if ((status = v3_handle_efer_write(core, msr, src, priv_data)) != 0) {
+ return status;
+ }
+
+ // SVM-specific code
+ {
+ // Ensure that hardware visible EFER.SVME bit is set (SVM Enable)
+ struct efer_64 * hw_efer = (struct efer_64 *)&(core->ctrl_regs.efer);
+ hw_efer->svme = 1;
+ }
+
+ return 0;
+}
+
static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info * core) {
vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
ctrl_area->instrs.PAUSE = 1;
ctrl_area->instrs.shutdown_evts = 1;
- /* KCH: intercept SW Interrupts (INT instr) */
-#ifdef V3_CONFIG_SW_INTERRUPTS
- ctrl_area->instrs.INTn = 1;
-#endif
-
/* DEBUG FOR RETURN CODE */
ctrl_area->exit_code = 1;
v3_hook_msr(core->vm_info, EFER_MSR,
&v3_handle_efer_read,
- &v3_handle_efer_write,
+ &v3_svm_handle_efer_write,
core);
-#ifdef V3_CONFIG_HIJACK_SYSCALL_MSR
- /* KCH: we're not hooking these to TRAP them,
- instead, we're going to catch the target EIP.
- Hopefully this EIP is the entry point in the ELF located in the
- vsyscall page. We can inject checks into the code segment such that
- we don't have to exit on uninteresting system calls. This should
- give us much better performance than INT 80, and should even obviate
- the need to deal with software interrupts at all */
- v3_hook_msr(core->vm_info, STAR_MSR,
- &v3_handle_star_read,
- &v3_handle_star_write,
- core);
- v3_hook_msr(core->vm_info, LSTAR_MSR,
- &v3_handle_lstar_read,
- &v3_handle_lstar_write,
- core);
- v3_hook_msr(core->vm_info, CSTAR_MSR,
- &v3_handle_cstar_read,
- &v3_handle_cstar_write,
- core);
-
- /* KCH: this probably isn't necessary, as
- SYSENTER is only used in legacy mode. In fact,
- in long mode it results in an illegal instruction
- exception */
- v3_hook_msr(core->vm_info, IA32_SYSENTER_EIP_MSR,
- &v3_handle_seeip_read,
- &v3_handle_seeip_write,
- core);
-#endif
-
if (core->shdw_pg_mode == SHADOW_PAGING) {
PrintDebug("Creating initial shadow page table\n");
&v3_handle_vm_cr_read,
&v3_handle_vm_cr_write,
core);
+
+
+ {
+ v3_hook_msr(core->vm_info, IA32_STAR_MSR, NULL, NULL, NULL);
+ v3_hook_msr(core->vm_info, IA32_LSTAR_MSR, NULL, NULL, NULL);
+ v3_hook_msr(core->vm_info, IA32_FMASK_MSR, NULL, NULL, NULL);
+ v3_hook_msr(core->vm_info, IA32_KERN_GS_BASE_MSR, NULL, NULL, NULL);
+ v3_hook_msr(core->vm_info, IA32_CSTAR_MSR, NULL, NULL, NULL);
+
+ v3_hook_msr(core->vm_info, SYSENTER_CS_MSR, NULL, NULL, NULL);
+ v3_hook_msr(core->vm_info, SYSENTER_ESP_MSR, NULL, NULL, NULL);
+ v3_hook_msr(core->vm_info, SYSENTER_EIP_MSR, NULL, NULL, NULL);
+ }
}
}
+#ifdef V3_CONFIG_CHECKPOINT
+int v3_svm_save_core(struct guest_info * core, void * ctx){
+
+ v3_chkpt_save_8(ctx, "cpl", &(core->cpl));
+ v3_chkpt_save(ctx, "vmcb_data", PAGE_SIZE, core->vmm_data);
+
+ return 0;
+}
+
+int v3_svm_load_core(struct guest_info * core, void * ctx){
+
+ v3_chkpt_load_8(ctx, "cpl", &(core->cpl));
+
+ if (v3_chkpt_load(ctx, "vmcb_data", PAGE_SIZE, core->vmm_data) == -1) {
+ return -1;
+ }
+
+ return 0;
+}
+#endif
+
static int update_irq_exit_state(struct guest_info * info) {
vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
case V3_NMI:
guest_ctrl->EVENTINJ.type = SVM_INJECTION_NMI;
break;
- case V3_SOFTWARE_INTR: {
-#ifdef CONFIG_DEBUG_INTERRUPTS
- PrintDebug("Caught an injected software interrupt\n");
- PrintDebug("\ttype: %d, vector: %d\n", SVM_INJECTION_SOFT_INTR, info->intr_core_state.swintr_vector);
+ case V3_SOFTWARE_INTR:
+ guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
+
+#ifdef V3_CONFIG_DEBUG_INTERRUPTS
+ PrintDebug("Injecting software interrupt -- type: %d, vector: %d\n",
+ SVM_INJECTION_SOFT_INTR, info->intr_core_state.swintr_vector);
#endif
- guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
- guest_ctrl->EVENTINJ.vector = info->intr_core_state.swintr_vector;
- guest_ctrl->EVENTINJ.valid = 1;
+ guest_ctrl->EVENTINJ.vector = info->intr_core_state.swintr_vector;
+ guest_ctrl->EVENTINJ.valid = 1;
- /* reset the software interrupt state.
- we can do this because we know only one
- sw int can be posted at a time on a given
- core, unlike irqs */
- info->intr_core_state.swintr_posted = 0;
- info->intr_core_state.swintr_vector = 0;
- break;
- }
+ /* reset swintr state */
+ info->intr_core_state.swintr_posted = 0;
+ info->intr_core_state.swintr_vector = 0;
+
+ break;
case V3_VIRTUAL_IRQ:
guest_ctrl->EVENTINJ.type = SVM_INJECTION_IRQ;
break;
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));
addr_t exit_code = 0, exit_info1 = 0, exit_info2 = 0;
+ sint64_t tsc_offset;
// Conditionally yield the CPU if the timeslice has expired
v3_yield_cond(info);
// disable global interrupts for vm state transition
v3_clgi();
- // Update timer devices prior to entering VM.
+ // Update timer devices after being in the VM, with interupts
+ // disabled, but before doing IRQ updates, so that any interrupts they
+ //raise get seen immediately.
v3_update_timers(info);
// Synchronize the guest state to the VMCB
#endif
v3_time_enter_vm(info);
- guest_ctrl->TSC_OFFSET = v3_tsc_host_offset(&info->time_state);
+ tsc_offset = v3_tsc_host_offset(&info->time_state);
+ guest_ctrl->TSC_OFFSET = tsc_offset;
+
//V3_Print("Calling v3_svm_launch\n");
info->mem_mode = v3_get_vm_mem_mode(info);
/* ** */
-
// save exit info here
exit_code = guest_ctrl->exit_code;
exit_info1 = guest_ctrl->exit_info1;
exit_info2 = guest_ctrl->exit_info2;
-
#ifdef V3_CONFIG_SYMCALL
if (info->sym_core_state.symcall_state.sym_call_active == 0) {
update_irq_exit_state(info);
update_irq_exit_state(info);
#endif
-
// reenable global interrupts after vm exit
v3_stgi();
-
// Conditionally yield the CPU if the timeslice has expired
v3_yield_cond(info);
-
-
- if (v3_handle_svm_exit(info, exit_code, exit_info1, exit_info2) != 0) {
- PrintError("Error in SVM exit handler\n");
- PrintError(" last exit was %d\n", v3_last_exit);
- return -1;
+ {
+ int ret = v3_handle_svm_exit(info, exit_code, exit_info1, exit_info2);
+
+ if (ret != 0) {
+ PrintError("Error in SVM exit handler (ret=%d)\n", ret);
+ PrintError(" last Exit was %d (exit code=0x%llx)\n", v3_last_exit, (uint64_t) exit_code);
+ return -1;
+ }
}
PrintDebug("SVM core %u (on %u): Waiting for core initialization\n", info->vcpu_id, info->pcpu_id);
while (info->core_run_state == CORE_STOPPED) {
+
+ if (info->vm_info->run_state == VM_STOPPED) {
+ // The VM was stopped before this core was initialized.
+ return 0;
+ }
+
v3_yield(info);
//PrintDebug("SVM core %u: still waiting for INIT\n", info->vcpu_id);
}
PrintDebug("SVM core %u(on %u) initialized\n", info->vcpu_id, info->pcpu_id);
+
+ // We'll be paranoid about race conditions here
+ v3_wait_at_barrier(info);
}
PrintDebug("SVM core %u(on %u): I am starting at CS=0x%x (base=0x%p, limit=0x%x), RIP=0x%p\n",
break;
}
+ v3_wait_at_barrier(info);
+
if (info->vm_info->run_state == VM_STOPPED) {
info->core_run_state = CORE_STOPPED;
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);
-
+
//PrintDebug("CPUID_EXT_FEATURE_IDS_edx=0x%x\n", edx);
-
+
if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_np) == 0) {
V3_Print("SVM Nested Paging not supported\n");
return 0;
V3_Print("SVM Nested Paging supported\n");
return 1;
}
-}
-
+ }
+
void v3_init_svm_cpu(int cpu_id) {
