#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>
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;
+
+ // Now we allocate space for the new region with the same constraints as
+ // it originally had
+ new_hpa = V3_AllocPagesExtended(num_pages,
+ PAGE_SIZE_4KB,
+ new_node,
+ reg->flags.limit32 ? V3_ALLOC_PAGES_CONSTRAINT_4GB : 0);
+
+ 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);
+ } 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) {
