#include <palacios/vmm_timeout.h>
#include <palacios/vmm_options.h>
#include <palacios/vmm_cpu_mapper.h>
+#include <palacios/vmm_direct_paging.h>
+#include <interfaces/vmm_numa.h>
#ifdef V3_CONFIG_SVM
#include <palacios/svm.h>
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");
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;
int minor = 0;
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;
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;i<vm->num_cores;i++) {
- if (vm->cores[i].shdw_pg_mode == SHADOW_PAGING) {
- for (j=0;j<vm->mem_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);
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;i<vm->num_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) {
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);
}
if (all_blocked == 1) {
break;
}
-
+
+ // Intentionally spin if there is no one to yield to
v3_yield(NULL,-1);
}
