X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fsvm.c;h=f9dad0bee0897ae97dfd7f27815c480f5b5afe94;hb=8a3dbb70c29175bad79764a0b2f3961b98138bb2;hp=8134d012a2535cddd94211cc8f46298f2853eef5;hpb=3db6f4c76bd6412d0154b7693c1516d792486b13;p=palacios.git diff --git a/palacios/src/palacios/svm.c b/palacios/src/palacios/svm.c index 8134d01..f9dad0b 100644 --- a/palacios/src/palacios/svm.c +++ b/palacios/src/palacios/svm.c @@ -1,4 +1,3 @@ - /* * This file is part of the Palacios Virtual Machine Monitor developed * by the V3VEE Project with funding from the United States National @@ -36,6 +35,11 @@ #include #include +#include + +#ifdef V3_CONFIG_CHECKPOINT +#include +#endif #include @@ -81,6 +85,25 @@ static vmcb_t * Allocate_VMCB() { } +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); @@ -136,11 +159,6 @@ static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info * core) { 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; @@ -226,40 +244,9 @@ static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info * core) { 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"); @@ -355,6 +342,27 @@ int v3_deinit_svm_vmcb(struct guest_info * core) { } +#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)); @@ -459,23 +467,21 @@ static int update_irq_entry_state(struct guest_info * info) { 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; @@ -503,6 +509,7 @@ 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)); 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); @@ -563,7 +570,9 @@ int v3_svm_enter(struct guest_info * info) { #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"); @@ -652,6 +661,9 @@ int v3_start_svm_guest(struct guest_info * info) { } 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", @@ -711,6 +723,8 @@ int v3_start_svm_guest(struct guest_info * info) { break; } + v3_wait_at_barrier(info); + if (info->vm_info->run_state == VM_STOPPED) { info->core_run_state = CORE_STOPPED;