X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm.c;h=ac918732609f27d7b839107703fdadda9e42cc15;hb=10446dafcbc15a8aa1639c52b5996f814ed37f27;hp=b49b75e9c48d8aa67abafd0aaaac11991c2a0364;hpb=c17cafcb6db943bd5bbb31d86f0392c113b2d668;p=palacios.releases.git diff --git a/palacios/src/palacios/vmm.c b/palacios/src/palacios/vmm.c index b49b75e..ac91873 100644 --- a/palacios/src/palacios/vmm.c +++ b/palacios/src/palacios/vmm.c @@ -29,6 +29,8 @@ #include #include #include +#include +#include #ifdef V3_CONFIG_SVM #include @@ -53,6 +55,8 @@ int v3_dbg_enable = 0; static void init_cpu(void * arg) { uint32_t cpu_id = (uint32_t)(addr_t)arg; + v3_init_fp(); + #ifdef V3_CONFIG_SVM if (v3_is_svm_capable()) { PrintDebug(VM_NONE, VCORE_NONE, "Machine is SVM Capable\n"); @@ -98,7 +102,21 @@ static void deinit_cpu(void * arg) { PrintError(VM_NONE, VCORE_NONE, "CPU has no virtualization Extensions\n"); break; } + + v3_deinit_fp(); + +} + + +static int in_long_mode() +{ + uint32_t high, low; + + v3_get_msr(0xc0000080,&high,&low); // EFER + + return ((low & 0x500)== 0x500); // LMA and LME set } + void Init_V3(struct v3_os_hooks * hooks, char * cpu_mask, int num_cpus, char *options) { int i = 0; @@ -107,9 +125,24 @@ void Init_V3(struct v3_os_hooks * hooks, char * cpu_mask, int num_cpus, char *op V3_Print(VM_NONE, VCORE_NONE, "V3 Print statement to fix a Kitten page fault bug\n"); + + +#ifndef __V3_64BIT__ +#error Palacios does not support compilation for a 32 bit host OS!!!! +#else + if (!in_long_mode()) { + PrintError(VM_NONE,VCORE_NONE,"Palacios supports execution only in long mode (64 bit).\n"); + return; + } +#endif + // Set global variables. os_hooks = hooks; + if (num_cpus>V3_CONFIG_MAX_CPUS) { + PrintError(VM_NONE,VCORE_NONE, "Requesting as many as %d cpus, but Palacios is compiled for a maximum of %d. Only the first %d cpus will be considered\n", num_cpus, V3_CONFIG_MAX_CPUS, V3_CONFIG_MAX_CPUS); + } + // Determine the global machine type v3_mach_type = V3_INVALID_CPU; @@ -155,7 +188,7 @@ void Init_V3(struct v3_os_hooks * hooks, char * cpu_mask, int num_cpus, char *op if ((hooks) && (hooks->call_on_cpu)) { - for (i = 0; i < num_cpus; i++) { + for (i = 0; i < num_cpus && i < V3_CONFIG_MAX_CPUS; i++) { major = i / 8; minor = i % 8; @@ -176,19 +209,9 @@ void Init_V3(struct v3_os_hooks * hooks, char * cpu_mask, int num_cpus, char *op void Shutdown_V3() { int i; - V3_deinit_devices(); - V3_deinit_shdw_paging(); - - V3_deinit_extensions(); - -#ifdef V3_CONFIG_SYMMOD - V3_deinit_symmod(); -#endif - -#ifdef V3_CONFIG_CHECKPOINT - V3_deinit_checkpoint(); -#endif + // Reverse order of Init_V3 + // bring down CPUs if ((os_hooks) && (os_hooks->call_on_cpu)) { for (i = 0; i < V3_CONFIG_MAX_CPUS; i++) { @@ -199,7 +222,32 @@ void Shutdown_V3() { } } +#ifdef V3_CONFIG_CHECKPOINT + V3_deinit_checkpoint(); +#endif + +#ifdef V3_CONFIG_SYMMOD + V3_deinit_symmod(); +#endif + + V3_disable_scheduler(); + + V3_disable_cpu_mapper(); + + V3_deinit_extensions(); + + V3_deinit_scheduling(); + + V3_deinit_cpu_mapper(); + + V3_deinit_shdw_paging(); + + V3_deinit_devices(); + v3_deinit_mem(); + + v3_deinit_options(); + } @@ -228,6 +276,11 @@ struct v3_vm_info * v3_create_vm(void * cfg, void * priv_data, char * name) { memset(vm->name, 0, 128); strncpy(vm->name, name, 127); + if(v3_cpu_mapper_register_vm(vm) == -1) { + + PrintError(vm, VCORE_NONE,"Error registering VM with cpu_mapper\n"); + } + /* * Register this VM with the palacios scheduler. It will ask for admission * prior to launch. @@ -278,34 +331,17 @@ static int start_core(void * p) int v3_start_vm(struct v3_vm_info * vm, unsigned int cpu_mask) { - uint32_t i,j; + uint32_t i; uint8_t * core_mask = (uint8_t *)&cpu_mask; // This is to make future expansion easier uint32_t avail_cores = 0; int vcore_id = 0; - extern uint64_t v3_mem_block_size; - if (vm->run_state != VM_STOPPED) { PrintError(vm, VCORE_NONE, "VM has already been launched (state=%d)\n", (int)vm->run_state); return -1; } - - // Do not run if any core is using shadow paging and we are out of 4 GB bounds - for (i=0;inum_cores;i++) { - if (vm->cores[i].shdw_pg_mode == SHADOW_PAGING) { - for (j=0;jmem_map.num_base_regions;j++) { - if ((vm->mem_map.base_regions[i].host_addr + v3_mem_block_size) >= 0x100000000ULL) { - PrintError(vm, VCORE_NONE, "Base memory region %d exceeds 4 GB boundary with shadow paging enabled on core %d.\n",j, i); - PrintError(vm, VCORE_NONE, "Any use of non-64 bit mode in the guest is likely to fail in this configuration.\n"); - PrintError(vm, VCORE_NONE, "If you would like to proceed anyway, remove this check and recompile Palacios.\n"); - PrintError(vm, VCORE_NONE, "Alternatively, change this VM to use nested paging.\n"); - return -1; - } - } - } - } - + /// CHECK IF WE ARE MULTICORE ENABLED.... V3_Print(vm, VCORE_NONE, "V3 -- Starting VM (%u cores)\n", vm->num_cores); @@ -328,21 +364,16 @@ int v3_start_vm(struct v3_vm_info * vm, unsigned int cpu_mask) { vm->avail_cores = avail_cores; - if (v3_scheduler_admit_vm(vm) != 0){ - PrintError(vm, VCORE_NONE,"Error admitting VM %s for scheduling", vm->name); + if (v3_cpu_mapper_admit_vm(vm,cpu_mask) != 0){ + PrintError(vm, VCORE_NONE,"Error admitting VM %s for mapping", vm->name); } - if (v3_cpu_mapper_admit_vm(vm) != 0){ - PrintError(vm, VCORE_NONE,"Error admitting VM %s for mapping", vm->name); + if (v3_scheduler_admit_vm(vm) != 0){ + PrintError(vm, VCORE_NONE,"Error admitting VM %s for scheduling", vm->name); } vm->run_state = VM_RUNNING; - if(v3_cpu_mapper_register_vm(vm,cpu_mask) == -1) { - - PrintError(vm, VCORE_NONE,"Error registering VM with cpu_mapper\n"); - } - for (vcore_id = 0; vcore_id < vm->num_cores; vcore_id++) { @@ -356,7 +387,14 @@ int v3_start_vm(struct v3_vm_info * vm, unsigned int cpu_mask) { PrintDebug(vm, VCORE_NONE, "run: core=%u, func=0x%p, arg=0x%p, name=%s\n", core->pcpu_id, start_core, core, core->exec_name); - core->core_run_state = CORE_STOPPED; // core zero will turn itself on + if (core->core_run_state==CORE_INVALID) { + // launch of a fresh VM + core->core_run_state = CORE_STOPPED; + // core zero will turn itself on + } else { + // this is a resume - use whatever its current run_state is + } + core->core_thread = V3_CREATE_THREAD_ON_CPU(core->pcpu_id, start_core, core, core->exec_name); if (core->core_thread == NULL) { @@ -469,10 +507,124 @@ int v3_move_vm_core(struct v3_vm_info * vm, int vcore_id, int target_cpu) { return 0; } +/* move a memory region to memory with affinity for a specific physical core */ +int v3_move_vm_mem(struct v3_vm_info * vm, void *gpa, int target_cpu) { + int old_node; + int new_node; + struct v3_mem_region *reg; + void *new_hpa; + int num_pages; + void *old_hpa; + int i; + + old_node = v3_numa_gpa_to_node(vm,(addr_t)gpa); + + if (old_node<0) { + PrintError(vm, VCORE_NONE, "Cannot determine current node of gpa %p\n",gpa); + return -1; + } + new_node = v3_numa_cpu_to_node(target_cpu); + + if (new_node<0) { + PrintError(vm, VCORE_NONE, "Cannot determine current node of cpu %d\n",target_cpu); + return -1; + } + + if (new_node==old_node) { + PrintDebug(vm, VCORE_NONE, "Affinity is already established - ignoring request\n"); + return 0; + } + + // We are now going to change the universe, so + // we'll barrier everyone first + + while (v3_raise_barrier(vm, NULL) == -1); + + // get region + + reg = v3_get_mem_region(vm, V3_MEM_CORE_ANY, (addr_t) gpa); + + if (!reg) { + PrintError(vm, VCORE_NONE, "Attempt to migrate non-existent memory\n"); + goto out_fail; + } + + if (!(reg->flags.base) || !(reg->flags.alloced)) { + PrintError(vm, VCORE_NONE, "Attempt to migrate invalid region: base=%d alloced=%d\n", reg->flags.base, reg->flags.alloced); + goto out_fail; + } + + // we now have the allocated base region corresponding to - and not a copy + // we will rewrite this region after moving its contents + + // first, let's double check that we are in fact changing the numa_id... + + if (reg->numa_id==new_node) { + PrintDebug(vm, VCORE_NONE, "Affinity for this base region is already established - ignoring...\n"); + goto out_success; + } + + // region uses exclusive addressing [guest_start,guest_end) + num_pages = (reg->guest_end-reg->guest_start)/PAGE_SIZE; + + new_hpa = V3_AllocPagesExtended(num_pages, + PAGE_SIZE_4KB, + new_node, + 0); // no constraints given new shadow pager impl + + if (!new_hpa) { + PrintError(vm, VCORE_NONE, "Cannot allocate memory for new base region...\n"); + goto out_fail; + } + + // Note, assumes virtual contiguity in the host OS... + memcpy(V3_VAddr((void*)new_hpa), V3_VAddr((void*)(reg->host_addr)), num_pages*PAGE_SIZE); + + old_hpa = (void*)(reg->host_addr); + old_node = (int)(reg->numa_id); + + reg->host_addr = (addr_t)new_hpa; + reg->numa_id = v3_numa_hpa_to_node((addr_t)new_hpa); + + // flush all page tables / kill all humans + + for (i=0;inum_cores;i++) { + if (vm->cores[i].shdw_pg_mode==SHADOW_PAGING) { + v3_invalidate_shadow_pts(&(vm->cores[i])); + } else if (vm->cores[i].shdw_pg_mode==NESTED_PAGING) { + // nested invalidator uses inclusive addressing [start,end], not [start,end) + v3_invalidate_nested_addr_range(&(vm->cores[i]),reg->guest_start,reg->guest_end-1,NULL,NULL); + } else { + PrintError(vm,VCORE_NONE, "Cannot determine how to invalidate paging structures! Reverting to previous region.\n"); + // We'll restore things... + reg->host_addr = (addr_t) old_hpa; + reg->numa_id = old_node; + V3_FreePages(new_hpa,num_pages); + goto out_fail; + } + } + + // Now the old region can go away... + V3_FreePages(old_hpa,num_pages); + + PrintDebug(vm,VCORE_NONE,"Migration of memory complete - new region is %p to %p\n", + (void*)(reg->host_addr),(void*)(reg->host_addr+num_pages*PAGE_SIZE-1)); + + out_success: + v3_lower_barrier(vm); + return 0; + + + out_fail: + v3_lower_barrier(vm); + return -1; +} int v3_stop_vm(struct v3_vm_info * vm) { + struct guest_info * running_core; + if ((vm->run_state != VM_RUNNING) && (vm->run_state != VM_SIMULATING)) { PrintError(vm, VCORE_NONE,"Tried to stop VM in invalid runstate (%d)\n", vm->run_state); @@ -494,6 +646,7 @@ int v3_stop_vm(struct v3_vm_info * vm) { for (i = 0; i < vm->num_cores; i++) { if (vm->cores[i].core_run_state != CORE_STOPPED) { + running_core = &vm->cores[i]; still_running = 1; } } @@ -502,7 +655,7 @@ int v3_stop_vm(struct v3_vm_info * vm) { break; } - v3_yield(NULL,-1); + v3_scheduler_stop_core(running_core); } V3_Print(vm, VCORE_NONE,"VM stopped. Returning\n"); @@ -550,6 +703,7 @@ static int sim_callback(struct guest_info * core, void * private_data) { V3_Print(core->vm_info, core, "Simulation callback activated (guest_rip=%p)\n", (void *)core->rip); while (v3_bitmap_check(timeout_map, core->vcpu_id) == 1) { + // We spin here if there is noone to yield to v3_yield(NULL,-1); } @@ -620,7 +774,8 @@ int v3_simulate_vm(struct v3_vm_info * vm, unsigned int msecs) { if (all_blocked == 1) { break; } - + + // Intentionally spin if there is no one to yield to v3_yield(NULL,-1); } @@ -746,10 +901,12 @@ int v3_free_vm(struct v3_vm_info * vm) { // free cores for (i = 0; i < vm->num_cores; i++) { + v3_scheduler_free_core(&(vm->cores[i])); v3_free_core(&(vm->cores[i])); } // free vm + v3_scheduler_free_vm(vm); v3_free_vm_internal(vm); v3_free_config(vm);