+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National
+ * Science Foundation and the Department of Energy.
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico. You can find out more at
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
#include <palacios/vmm_mem.h>
#include <palacios/vmm.h>
#include <palacios/vmm_util.h>
-#include <palacios/vmm_decoder.h>
+#include <palacios/vmm_emulator.h>
+#include <palacios/vm_guest.h>
+#include <palacios/vmm_debug.h>
+#include <palacios/vmm_shadow_paging.h>
+#include <palacios/vmm_direct_paging.h>
+#include <interfaces/vmm_numa.h>
-void init_shadow_region(struct shadow_region * entry,
- addr_t guest_addr_start,
- addr_t guest_addr_end,
- guest_region_type_t guest_region_type,
- host_region_type_t host_region_type)
-{
- entry->guest_type = guest_region_type;
- entry->guest_start = guest_addr_start;
- entry->guest_end = guest_addr_end;
- entry->host_type = host_region_type;
- entry->host_addr = 0;
- entry->next=entry->prev = NULL;
-}
+#ifdef V3_CONFIG_SWAPPING
+#include <palacios/vmm_swapping.h>
+#endif
-int add_shadow_region_passthrough( struct guest_info * guest_info,
- addr_t guest_addr_start,
- addr_t guest_addr_end,
- addr_t host_addr)
-{
- struct shadow_region * entry = (struct shadow_region *)V3_Malloc(sizeof(struct shadow_region));
+uint64_t v3_mem_block_size = V3_CONFIG_MEM_BLOCK_SIZE;
- init_shadow_region(entry, guest_addr_start, guest_addr_end,
- GUEST_REGION_PHYSICAL_MEMORY, HOST_REGION_PHYSICAL_MEMORY);
- entry->host_addr = host_addr;
- return add_shadow_region(&(guest_info->mem_map), entry);
-}
-int hook_guest_mem(struct guest_info * info, addr_t guest_addr_start, addr_t guest_addr_end,
- int (*read)(addr_t guest_addr, void * dst, uint_t length, void * priv_data),
- int (*write)(addr_t guest_addr, void * src, uint_t length, void * priv_data),
- void * priv_data) {
-
- struct shadow_region * entry = (struct shadow_region *)V3_Malloc(sizeof(struct shadow_region));
- struct vmm_mem_hook * hook = (struct vmm_mem_hook *)V3_Malloc(sizeof(struct vmm_mem_hook));
- memset(hook, 0, sizeof(struct vmm_mem_hook));
+struct v3_mem_region * v3_get_base_region(struct v3_vm_info * vm, addr_t gpa) {
+
+ //PrintDebug(VM_NONE, VCORE_NONE, "get_base_region called");
+ struct v3_mem_map * map = &(vm->mem_map);
+ uint32_t block_index = gpa / v3_mem_block_size;
+ struct v3_mem_region *reg;
+ if ((gpa >= (map->num_base_regions * v3_mem_block_size)) ||
+ (block_index >= map->num_base_regions)) {
+ PrintError(vm, VCORE_NONE, "Guest Address Exceeds Base Memory Size (ga=0x%p), (limit=0x%p)\n",
+ (void *)gpa, (void *)vm->mem_size);
+ v3_print_mem_map(vm);
- hook->read = read;
- hook->write = write;
- hook->region = entry;
- hook->priv_data = priv_data;
-
-
- init_shadow_region(entry, guest_addr_start, guest_addr_end,
- GUEST_REGION_PHYSICAL_MEMORY, HOST_REGION_HOOK);
+ return NULL;
+ }
- entry->host_addr = (addr_t)hook;
+ reg = &(map->base_regions[block_index]);
+
+#ifdef V3_CONFIG_SWAPPING
+ if(vm->swap_state.enable_swapping) {
+ if (reg->flags.swapped) {
+ if (v3_swap_in_region(vm,reg)) {
+ PrintError(vm, VCORE_NONE, "Unable to swap in region GPA=%p..%p!!!\n",(void*)reg->guest_start,(void*)reg->guest_end);
+ v3_print_mem_map(vm);
+ return NULL;
+ }
+ }
+ }
+ v3_touch_region(vm,reg);
+#endif
- return add_shadow_region(&(info->mem_map), entry);
+ return reg;
}
-struct vmm_mem_hook * get_mem_hook(struct guest_info * info, addr_t guest_addr) {
- struct shadow_region * region = get_shadow_region_by_addr(&(info->mem_map), guest_addr);
- if (region == NULL) {
- PrintDebug("Could not find shadow region for addr: %x\n", guest_addr);
- return NULL;
- }
+static int mem_offset_hypercall(struct guest_info * info, uint_t hcall_id, void * private_data) {
+ /*
+ PrintDebug(info->vm_info, info,"V3Vee: Memory offset hypercall (offset=%p)\n",
+ (void *)(info->vm_info->mem_map.base_region.host_addr));
- return (struct vmm_mem_hook *)(region->host_addr);
+ info->vm_regs.rbx = info->vm_info->mem_map.base_region.host_addr;
+ */
+ return -1;
}
+static int unhandled_err(struct guest_info * core, addr_t guest_va, addr_t guest_pa,
+ struct v3_mem_region * reg, pf_error_t access_info) {
-int mem_hook_dispatch(struct guest_info * info, addr_t mem_addr, pf_error_t access_info, struct vmm_mem_hook * hook) {
+ PrintError(core->vm_info, core, "Unhandled memory access error (gpa=%p, gva=%p, error_code=%d)\n",
+ (void *)guest_pa, (void *)guest_va, *(uint32_t *)&access_info);
- if (access_info.write == 1) {
- void * src = NULL;
- uint_t length = 0;
- PrintDebug("Memory hook write\n");
- return -1;
+ v3_print_mem_map(core->vm_info);
- if (hook->write(mem_addr, src, length, hook->priv_data) != length) {
- return -1;
- }
- } else {
- PrintDebug("Memory hook read\n");
- return -1;
- }
+ v3_print_guest_state(core);
- return -1;
+ return -1;
}
+static int gpa_to_node_from_cfg(struct v3_vm_info * vm, addr_t gpa) {
+ v3_cfg_tree_t * layout_cfg = v3_cfg_subtree(vm->cfg_data->cfg, "mem_layout");
+ v3_cfg_tree_t * region_desc = v3_cfg_subtree(layout_cfg, "region");
+
+ while (region_desc) {
+ char * start_addr_str = v3_cfg_val(region_desc, "start_addr");
+ char * end_addr_str = v3_cfg_val(region_desc, "end_addr");
+ char * node_id_str = v3_cfg_val(region_desc, "node");
+
+ addr_t start_addr = 0;
+ addr_t end_addr = 0;
+ int node_id = 0;
+
+ if ((!start_addr_str) || (!end_addr_str) || (!node_id_str)) {
+ PrintError(vm, VCORE_NONE, "Invalid memory layout in configuration\n");
+ return -1;
+ }
+
+ start_addr = atox(start_addr_str);
+ end_addr = atox(end_addr_str);
+ node_id = atoi(node_id_str);
+
+ if ((gpa >= start_addr) && (gpa < end_addr)) {
+ return node_id;
+ }
+
+ region_desc = v3_cfg_next_branch(region_desc);
+ }
-int handle_special_page_fault(struct guest_info * info, addr_t mem_addr, pf_error_t access_info) {
- struct shadow_region * reg = get_shadow_region_by_addr(&(info->mem_map), mem_addr);
-
- switch (reg->host_type) {
- case HOST_REGION_HOOK:
- return mem_hook_dispatch(info, mem_addr, access_info, (struct vmm_mem_hook *)(reg->host_addr));
- default:
return -1;
- }
-
- return 0;
+}
+//
+// This code parallels that in vmm_shadow_paging.c:v3_init_shdw_impl()
+// and vmm_config.c:determine_paging_mode. The determination of which
+// paging mode will be used is determined much later than the allocation of
+// the guest memory regions, so we need to do this here to decide if they
+// need to be below 4 GB or not.
+static int will_use_shadow_paging(struct v3_vm_info *vm)
+{
+ v3_cfg_tree_t * pg_cfg = v3_cfg_subtree(vm->cfg_data->cfg, "paging");
+ char * pg_mode = v3_cfg_val(pg_cfg, "mode");
+
+ if (pg_mode == NULL) {
+ return 1; // did not ask, get shadow
+ } else {
+ if (strcasecmp(pg_mode, "nested") == 0) {
+ extern v3_cpu_arch_t v3_mach_type;
+ if ((v3_mach_type == V3_SVM_REV3_CPU) ||
+ (v3_mach_type == V3_VMX_EPT_CPU) ||
+ (v3_mach_type == V3_VMX_EPT_UG_CPU)) {
+ return 0; // ask for nested, get nested
+ } else {
+ return 1; // ask for nested, get shadow
+ }
+ } else if (strcasecmp(pg_mode, "shadow") != 0) {
+ return 1; // ask for shadow, get shadow
+ } else {
+ return 1; // ask for something else, get shadow
+ }
+ }
}
+#define CEIL_DIV(x,y) (((x)/(y)) + !!((x)%(y)))
-void init_shadow_map(struct shadow_map * map) {
- map->num_regions = 0;
+int v3_init_mem_map(struct v3_vm_info * vm) {
+ struct v3_mem_map * map = &(vm->mem_map);
+ addr_t block_pages = v3_mem_block_size >> 12;
+ int i = 0;
+ uint64_t num_base_regions_host_mem;
- map->head = NULL;
-}
+ map->num_base_regions = CEIL_DIV(vm->mem_size, v3_mem_block_size);
+ num_base_regions_host_mem=map->num_base_regions; // without swapping
-void free_shadow_map(struct shadow_map * map) {
- struct shadow_region * cursor = map->head;
- struct shadow_region * tmp = NULL;
+ PrintDebug(VM_NONE, VCORE_NONE, "v3_init_mem_map: num_base_regions:%d",map->num_base_regions);
- while(cursor) {
- tmp = cursor;
- cursor = cursor->next;
- V3_Free(tmp);
- }
+ map->mem_regions.rb_node = NULL;
- V3_Free(map);
-}
+#ifdef V3_CONFIG_SWAPPING
+ if (vm->swap_state.enable_swapping) {
+ num_base_regions_host_mem = CEIL_DIV(vm->swap_state.host_mem_size, v3_mem_block_size);
+ }
+#endif
+ PrintDebug(VM_NONE, VCORE_NONE, "v3_init_mem_map: %llu base regions will be allocated of %llu base regions in guest\n",
+ (uint64_t)num_base_regions_host_mem, (uint64_t)map->num_base_regions);
+
+ map->base_regions = V3_VMalloc(sizeof(struct v3_mem_region) * map->num_base_regions);
+ if (map->base_regions == NULL) {
+ PrintError(vm, VCORE_NONE, "Could not allocate base region array\n");
+ return -1;
+ }
+ memset(map->base_regions, 0, sizeof(struct v3_mem_region) * map->num_base_regions);
+ for (i = 0; i < map->num_base_regions; i++) {
+
-int add_shadow_region(struct shadow_map * map,
- struct shadow_region * region)
-{
- struct shadow_region * cursor = map->head;
+ struct v3_mem_region * region = &(map->base_regions[i]);
+ int node_id = -1;
- PrintDebug("Adding Shadow Region: (0x%x-0x%x)\n", region->guest_start, region->guest_end);
+ // 2MB page alignment needed for 2MB hardware nested paging
+ // If swapping is enabled, the host memory will be allocated to low address regions at initialization
+ region->guest_start = v3_mem_block_size * i;
+ region->guest_end = region->guest_start + v3_mem_block_size;
- if ((!cursor) || (cursor->guest_start >= region->guest_end)) {
- region->prev = NULL;
- region->next = cursor;
- map->num_regions++;
- map->head = region;
- return 0;
- }
+ // We assume that the xml config was smart enough to align the layout to the block size
+ // If they didn't we're going to ignore their settings
+ // and use whatever node the first byte of the block is assigned to
+ node_id = gpa_to_node_from_cfg(vm, region->guest_start);
+
- while (cursor) {
- // Check if it overlaps with the current cursor
- if ((cursor->guest_end > region->guest_start) && (cursor->guest_start < region->guest_start)) {
- // overlaps not allowed
- return -1;
- }
+ if (i < num_base_regions_host_mem) {
+ //The regions within num_base_regions_in_mem are allocated in host memory
+ V3_Print(vm, VCORE_NONE, "Allocating block %d on node %d\n", i, node_id);
+
+#ifdef V3_CONFIG_SWAPPING
+ // nothing to do - memset will have done it.
+#endif
- if (!(cursor->next)) {
- // add to the end of the list
- cursor->next = region;
- region->prev = cursor;
- region->next = NULL;
- map->num_regions++;
- return 0;
- } else if (cursor->next->guest_start >= region->guest_end) {
- // add here
- region->next = cursor->next;
- region->prev = cursor;
-
- cursor->next->prev = region;
- cursor->next = region;
-
- map->num_regions++;
-
- return 0;
- } else if (cursor->next->guest_end <= region->guest_start) {
- cursor = cursor->next;
- } else {
- PrintDebug("WTF?\n");
- // This cannot happen!
- // we should panic here
- return -1;
+ region->host_addr = (addr_t)V3_AllocPagesExtended(block_pages,
+ PAGE_SIZE_4KB,
+ node_id,
+ 0, 0); // no constraints
+
+ if ((void *)region->host_addr == NULL) {
+ PrintError(vm, VCORE_NONE, "Could not allocate guest memory\n");
+ return -1;
+ }
+
+ // Clear the memory...
+ memset(V3_VAddr((void *)region->host_addr), 0, v3_mem_block_size);
+
+ } else {
+
+#ifdef V3_CONFIG_SWAPPING
+ if(vm->swap_state.enable_swapping) {
+ // The regions beyond num_base_regions_in_mem are allocated on disk to start
+ region->flags.swapped = 1;
+ region->host_addr=(addr_t) 0;
+ // other flags / state correctly set up by zeroing the region earlier
+ }
+#endif
+
+ }
+
+
+ // Note assigned numa ID could be different than our request...
+ // Also note that when swapping is used, the numa info will
+ // reflect the numa id of address 0x0 for unallocated regions
+ //
+ region->numa_id = v3_numa_hpa_to_node(region->host_addr);
+
+ region->flags.read = 1;
+ region->flags.write = 1;
+ region->flags.exec = 1;
+ region->flags.base = 1;
+ region->flags.alloced = 1;
+ region->flags.limit32 = will_use_shadow_paging(vm);
+
+ region->unhandled = unhandled_err;
}
- }
-
- // This cannot happen
- // We should panic here
- return -1;
-}
+ v3_register_hypercall(vm, MEM_OFFSET_HCALL, mem_offset_hypercall, NULL);
-int delete_shadow_region(struct shadow_map * map,
- addr_t guest_start,
- addr_t guest_end) {
- return -1;
+ return 0;
}
+void v3_delete_mem_map(struct v3_vm_info * vm) {
+ struct v3_mem_map * map = &(vm->mem_map);
+ struct rb_node * node = v3_rb_first(&(map->mem_regions));
+ struct v3_mem_region * reg;
+ struct rb_node * tmp_node = NULL;
+ addr_t block_pages = v3_mem_block_size >> 12;
+ int i = 0;
-struct shadow_region *get_shadow_region_by_index(struct shadow_map * map,
- uint_t index) {
- struct shadow_region * reg = map->head;
- uint_t i = 0;
+ while (node) {
+ reg = rb_entry(node, struct v3_mem_region, tree_node);
+ tmp_node = node;
+ node = v3_rb_next(node);
- while (reg) {
- if (i == index) {
- return reg;
+ v3_delete_mem_region(vm, reg);
+ }
+
+ for (i = 0; i < map->num_base_regions; i++) {
+ struct v3_mem_region * region = &(map->base_regions[i]);
+#ifdef V3_CONFIG_SWAPPING
+ if (vm->swap_state.enable_swapping) {
+ if (!region->flags.swapped) {
+ V3_FreePages((void *)(region->host_addr), block_pages);
+ } // otherwise this is not allocated space
+ }
+#else
+ V3_FreePages((void *)(region->host_addr), block_pages);
+#endif
}
- reg = reg->next;
- i++;
- }
- return NULL;
+
+ V3_VFree(map->base_regions);
}
-struct shadow_region * get_shadow_region_by_addr(struct shadow_map * map,
- addr_t addr) {
- struct shadow_region * reg = map->head;
+struct v3_mem_region * v3_create_mem_region(struct v3_vm_info * vm, uint16_t core_id,
+ addr_t guest_addr_start, addr_t guest_addr_end) {
+ struct v3_mem_region * entry = NULL;
- while (reg) {
- if ((reg->guest_start <= addr) && (reg->guest_end > addr)) {
- return reg;
- } else if (reg->guest_start > addr) {
- return NULL;
- } else {
- reg = reg->next;
+ if (guest_addr_start >= guest_addr_end) {
+ PrintError(vm, VCORE_NONE, "Region start is after region end\n");
+ return NULL;
}
- }
- return NULL;
-}
+ entry = (struct v3_mem_region *)V3_Malloc(sizeof(struct v3_mem_region));
-host_region_type_t get_shadow_addr_type(struct guest_info * info, addr_t guest_addr) {
- struct shadow_region * reg = get_shadow_region_by_addr(&(info->mem_map), guest_addr);
+ if (!entry) {
+ PrintError(vm, VCORE_NONE, "Cannot allocate in creating a memory region\n");
+ return NULL;
+ }
- if (!reg) {
- return HOST_REGION_INVALID;
- } else {
- return reg->host_type;
- }
-}
+ memset(entry, 0, sizeof(struct v3_mem_region));
-addr_t get_shadow_addr(struct guest_info * info, addr_t guest_addr) {
- struct shadow_region * reg = get_shadow_region_by_addr(&(info->mem_map), guest_addr);
+ entry->guest_start = guest_addr_start;
+ entry->guest_end = guest_addr_end;
+ entry->core_id = core_id;
+ entry->unhandled = unhandled_err;
- if (!reg) {
- return 0;
- } else {
- return (guest_addr - reg->guest_start) + reg->host_addr;
- }
+ return entry;
}
-host_region_type_t lookup_shadow_map_addr(struct shadow_map * map, addr_t guest_addr, addr_t * host_addr) {
- struct shadow_region * reg = get_shadow_region_by_addr(map, guest_addr);
-
- if (!reg) {
- // No mapping exists
- return HOST_REGION_INVALID;
- } else {
- switch (reg->host_type) {
- case HOST_REGION_PHYSICAL_MEMORY:
- *host_addr = (guest_addr - reg->guest_start) + reg->host_addr;
- return reg->host_type;
- case HOST_REGION_MEMORY_MAPPED_DEVICE:
- case HOST_REGION_UNALLOCATED:
- // ...
- default:
- *host_addr = 0;
- return reg->host_type;
- }
- }
-}
-void print_shadow_map(struct shadow_map * map) {
- struct shadow_region * cur = map->head;
- int i = 0;
+int v3_add_shadow_mem( struct v3_vm_info * vm, uint16_t core_id,
+ addr_t guest_addr_start,
+ addr_t guest_addr_end,
+ addr_t host_addr)
+{
+ struct v3_mem_region * entry = NULL;
+
+ entry = v3_create_mem_region(vm, core_id,
+ guest_addr_start,
+ guest_addr_end);
- PrintDebug("Memory Layout (regions: %d) \n", map->num_regions);
+ entry->host_addr = host_addr;
- while (cur) {
- PrintDebug("%d: 0x%x - 0x%x (%s) -> ", i, cur->guest_start, cur->guest_end - 1,
- cur->guest_type == GUEST_REGION_PHYSICAL_MEMORY ? "GUEST_REGION_PHYSICAL_MEMORY" :
- cur->guest_type == GUEST_REGION_NOTHING ? "GUEST_REGION_NOTHING" :
- cur->guest_type == GUEST_REGION_MEMORY_MAPPED_DEVICE ? "GUEST_REGION_MEMORY_MAPPED_DEVICE" :
- "UNKNOWN");
- if (cur->host_type == HOST_REGION_PHYSICAL_MEMORY ||
- cur->host_type == HOST_REGION_UNALLOCATED ||
- cur->host_type == HOST_REGION_MEMORY_MAPPED_DEVICE) {
- PrintDebug("0x%x", cur->host_addr);
+ entry->flags.read = 1;
+ entry->flags.write = 1;
+ entry->flags.exec = 1;
+ entry->flags.alloced = 1;
+
+ if (v3_insert_mem_region(vm, entry) == -1) {
+ V3_Free(entry);
+ return -1;
}
- PrintDebug("(%s)\n",
- cur->host_type == HOST_REGION_PHYSICAL_MEMORY ? "HOST_REGION_PHYSICAL_MEMORY" :
- cur->host_type == HOST_REGION_UNALLOCATED ? "HOST_REGION_UNALLOACTED" :
- cur->host_type == HOST_REGION_HOOK ? "HOST_REGION_HOOK" :
- cur->host_type == HOST_REGION_MEMORY_MAPPED_DEVICE ? "HOST_REGION_MEMORY_MAPPED_DEVICE" :
- cur->host_type == HOST_REGION_REMOTE ? "HOST_REGION_REMOTE" :
- cur->host_type == HOST_REGION_SWAPPED ? "HOST_REGION_SWAPPED" :
- "UNKNOWN");
- cur = cur->next;
- i++;
- }
+
+ return 0;
}
+static inline
+struct v3_mem_region * __insert_mem_region(struct v3_vm_info * vm,
+ struct v3_mem_region * region) {
+ struct rb_node ** p = &(vm->mem_map.mem_regions.rb_node);
+ struct rb_node * parent = NULL;
+ struct v3_mem_region * tmp_region;
+
+ while (*p) {
+ parent = *p;
+ tmp_region = rb_entry(parent, struct v3_mem_region, tree_node);
+
+ if (region->guest_end <= tmp_region->guest_start) {
+ p = &(*p)->rb_left;
+ } else if (region->guest_start >= tmp_region->guest_end) {
+ p = &(*p)->rb_right;
+ } else {
+ if ((region->guest_end != tmp_region->guest_end) ||
+ (region->guest_start != tmp_region->guest_start)) {
+ PrintError(vm, VCORE_NONE, "Trying to map a partial overlapped core specific page...\n");
+ return tmp_region; // This is ugly...
+ } else if (region->core_id == tmp_region->core_id) {
+ PrintError(vm, VCORE_NONE, "Trying to map a core-overlapping page\n");
+ return tmp_region;
+ } else if (region->core_id < tmp_region->core_id) {
+ p = &(*p)->rb_left;
+ } else {
+ p = &(*p)->rb_right;
+ }
+ }
+ }
+ rb_link_node(&(region->tree_node), parent, p);
+
+ return NULL;
+}
+int v3_insert_mem_region(struct v3_vm_info * vm, struct v3_mem_region * region) {
+ struct v3_mem_region * ret;
+ int i = 0;
+ int rc;
+ if ((ret = __insert_mem_region(vm, region))) {
+ PrintError(vm, VCORE_NONE, "Internal insert failed returned region is from 0x%p to 0x%p on vcore %d\n", (void*)(ret->guest_start), (void*)(ret->guest_end), ret->core_id);
+ return -1;
+ }
+ v3_rb_insert_color(&(region->tree_node), &(vm->mem_map.mem_regions));
-#ifdef VMM_MEM_TEST
+ rc = 0;
-#include <stdlib.h>
-#include <stdio.h>
-#include <stdarg.h>
+ for (i = 0; i < vm->num_cores; i++) {
+ struct guest_info * info = &(vm->cores[i]);
+ // flush virtual page tables
+ // 3 cases shadow, shadow passthrough, and nested
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
+ v3_mem_mode_t mem_mode = v3_get_vm_mem_mode(info);
+
+ if (mem_mode == PHYSICAL_MEM) {
+ rc |= v3_invalidate_passthrough_addr_range(info, region->guest_start, region->guest_end-1,NULL,NULL);
+ } else {
+ rc |= v3_invalidate_shadow_pts(info);
+ }
+
+ } else if (info->shdw_pg_mode == NESTED_PAGING) {
+ rc |= v3_invalidate_nested_addr_range(info, region->guest_start, region->guest_end-1,NULL,NULL);
+ }
+ }
+ return rc;
+}
+
+
+
+
+struct v3_mem_region * v3_get_mem_region(struct v3_vm_info * vm, uint16_t core_id, addr_t guest_addr) {
+ struct rb_node * n = vm->mem_map.mem_regions.rb_node;
+ struct v3_mem_region * reg = NULL;
+
+ while (n) {
+
+ reg = rb_entry(n, struct v3_mem_region, tree_node);
+
+ if (guest_addr < reg->guest_start) {
+ n = n->rb_left;
+ } else if (guest_addr >= reg->guest_end) {
+ n = n->rb_right;
+ } else {
+ if (reg->core_id == V3_MEM_CORE_ANY) {
+ // found relevant region, it's available on all cores
+ return reg;
+ } else if (core_id == reg->core_id) {
+ // found relevant region, it's available on the indicated core
+ return reg;
+ } else if (core_id < reg->core_id) {
+ // go left, core too big
+ n = n->rb_left;
+ } else if (core_id > reg->core_id) {
+ // go right, core too small
+ n = n->rb_right;
+ } else {
+ PrintDebug(vm, VCORE_NONE, "v3_get_mem_region: Impossible!\n");
+ return NULL;
+ }
+ }
+ }
-struct vmm_os_hooks * os_hooks;
+ // There is not registered region, so we check if its a valid address in the base region
-void * TestMalloc(uint_t size) {
- return malloc(size);
+ return v3_get_base_region(vm, guest_addr);
}
-void * TestAllocatePages(int size) {
- return malloc(4096 * size);
-}
-void TestPrint(const char * fmt, ...) {
- va_list args;
+/* This returns the next memory region based on a given address.
+ * If the address falls inside a sub region, that region is returned.
+ * If the address falls outside a sub region, the next sub region is returned
+ * NOTE that we have to be careful about core_ids here...
+ */
+static struct v3_mem_region * get_next_mem_region( struct v3_vm_info * vm, uint16_t core_id, addr_t guest_addr) {
+ struct rb_node * n = vm->mem_map.mem_regions.rb_node;
+ struct v3_mem_region * reg = NULL;
+ struct v3_mem_region * parent = NULL;
- va_start(args, fmt);
- vprintf(fmt, args);
- va_end(args);
-}
+ if (n == NULL) {
+ return NULL;
+ }
+
+ while (n) {
+
+ reg = rb_entry(n, struct v3_mem_region, tree_node);
+
+ if (guest_addr < reg->guest_start) {
+ n = n->rb_left;
+ } else if (guest_addr >= reg->guest_end) {
+ n = n->rb_right;
+ } else {
+ if (reg->core_id == V3_MEM_CORE_ANY) {
+ // found relevant region, it's available on all cores
+ return reg;
+ } else if (core_id == reg->core_id) {
+ // found relevant region, it's available on the indicated core
+ return reg;
+ } else if (core_id < reg->core_id) {
+ // go left, core too big
+ n = n->rb_left;
+ } else if (core_id > reg->core_id) {
+ // go right, core too small
+ n = n->rb_right;
+ } else {
+ PrintError(vm, VCORE_NONE, "v3_get_mem_region: Impossible!\n");
+ return NULL;
+ }
+ }
+
+ if ((reg->core_id == core_id) || (reg->core_id == V3_MEM_CORE_ANY)) {
+ parent = reg;
+ }
+ }
-int mem_list_add_test_1( vmm_mem_list_t * list) {
- uint_t offset = 0;
+ if (parent->guest_start > guest_addr) {
+ return parent;
+ } else if (parent->guest_end < guest_addr) {
+ struct rb_node * node = &(parent->tree_node);
- PrintDebug("\n\nTesting Memory List\n");
+ while ((node = v3_rb_next(node)) != NULL) {
+ struct v3_mem_region * next_reg = rb_entry(node, struct v3_mem_region, tree_node);
- init_mem_list(list);
+ if ((next_reg->core_id == V3_MEM_CORE_ANY) ||
+ (next_reg->core_id == core_id)) {
- offset = PAGE_SIZE * 6;
- PrintDebug("Adding 0x%x - 0x%x\n", offset, offset + (PAGE_SIZE * 10));
- add_mem_list_pages(list, offset, 10);
- print_mem_list(list);
+ // This check is not strictly necessary, but it makes it clearer
+ if (next_reg->guest_start > guest_addr) {
+ return next_reg;
+ }
+ }
+ }
+ }
+ return NULL;
+}
- offset = 0;
- PrintDebug("Adding 0x%x - 0x%x\n", offset, offset + PAGE_SIZE * 4);
- add_mem_list_pages(list, offset, 4);
- print_mem_list(list);
- offset = PAGE_SIZE * 20;
- PrintDebug("Adding 0x%x - 0x%x\n", offset, offset + (PAGE_SIZE * 1));
- add_mem_list_pages(list, offset, 1);
- print_mem_list(list);
- offset = PAGE_SIZE * 21;
- PrintDebug("Adding 0x%x - 0x%x\n", offset, offset + (PAGE_SIZE * 3));
- add_mem_list_pages(list, offset, 3);
- print_mem_list(list);
+/* Given an address region of memory, find if there are any regions that overlap with it.
+ * This checks that the range lies in a single region, and returns that region if it does,
+ * this can be either the base region or a sub region.
+ * IF there are multiple regions in the range then it returns NULL
+ */
+static struct v3_mem_region * get_overlapping_region(struct v3_vm_info * vm, uint16_t core_id,
+ addr_t start_gpa, addr_t end_gpa) {
+ struct v3_mem_region * start_region = v3_get_mem_region(vm, core_id, start_gpa);
- offset = PAGE_SIZE * 10;
- PrintDebug("Adding 0x%x - 0x%x\n", offset, offset + (PAGE_SIZE * 30));
- add_mem_list_pages(list, offset, 30);
- print_mem_list(list);
+ if (start_region == NULL) {
+ PrintError(vm, VCORE_NONE, "No overlapping region for core=%d, start_gpa=%p\n", core_id, (void*)start_gpa);
+ v3_print_mem_map(vm);
+ return NULL;
+ }
- offset = PAGE_SIZE * 5;
- PrintDebug("Adding 0x%x - 0x%x\n", offset, offset + (PAGE_SIZE * 1));
- add_mem_list_pages(list, offset, 1);
- print_mem_list(list);
+ if (start_region->guest_end < end_gpa) {
+ // Region ends before range
+ return NULL;
+ } else if (start_region->flags.base == 0) {
+ // sub region overlaps range
+ return start_region;
+ } else {
+ // Base region, now we have to scan forward for the next sub region
+ struct v3_mem_region * next_reg = get_next_mem_region(vm, core_id, start_gpa);
+
+ if (next_reg == NULL) {
+ // no sub regions after start_addr, base region is ok
+ return start_region;
+ } else if (next_reg->guest_start >= end_gpa) {
+ // Next sub region begins outside range
+ return start_region;
+ } else {
+ return NULL;
+ }
+ }
-
- return 0;
+ // Should never get here
+ return NULL;
}
-int mem_layout_add_test_1(vmm_mem_layout_t * layout) {
-
-
- uint_t start = 0;
- uint_t end = 0;
- PrintDebug("\n\nTesting Memory Layout\n");
- init_mem_layout(layout);
- start = 0x6000;
- end = 0x10000;;
- PrintDebug("Adding 0x%x - 0x%x\n", start, end);
- add_guest_mem_range(layout, start, end);
- print_mem_layout(layout);
+void v3_delete_mem_region(struct v3_vm_info * vm, struct v3_mem_region * reg) {
+ int i = 0;
+ int rc;
+ if (reg == NULL) {
+ return;
+ }
- start = 0x1000;
- end = 0x3000;
- PrintDebug("Adding 0x%x - 0x%x\n", start, end);
- add_guest_mem_range(layout, start, end);
- print_mem_layout(layout);
- start = 0x2000;
- end = 0x6000;
- PrintDebug("Adding 0x%x - 0x%x\n", start, end);
- add_guest_mem_range(layout, start, end);
- print_mem_layout(layout);
+ v3_rb_erase(&(reg->tree_node), &(vm->mem_map.mem_regions));
- start = 0x4000;
- end = 0x5000;
- PrintDebug("Adding 0x%x - 0x%x\n", start, end);
- add_guest_mem_range(layout, start, end);
- print_mem_layout(layout);
- start = 0x5000;
- end = 0x7000;
- PrintDebug("Adding 0x%x - 0x%x\n", start, end);
- add_guest_mem_range(layout, start, end);
- print_mem_layout(layout);
+ // If the guest isn't running then there shouldn't be anything to invalidate.
+ // Page tables should __always__ be created on demand during execution
+ // NOTE: This is a sanity check, and can be removed if that assumption changes
+ if (vm->run_state != VM_RUNNING) {
+ V3_Free(reg);
+ return;
+ }
+ rc = 0;
+
+ for (i = 0; i < vm->num_cores; i++) {
+ struct guest_info * info = &(vm->cores[i]);
+
+ // flush virtual page tables
+ // 3 cases shadow, shadow passthrough, and nested
+
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
+ v3_mem_mode_t mem_mode = v3_get_vm_mem_mode(info);
+
+ if (mem_mode == PHYSICAL_MEM) {
+ rc |= v3_invalidate_passthrough_addr_range(info,reg->guest_start, reg->guest_end-1,NULL,NULL);
+ } else {
+ rc |= v3_invalidate_shadow_pts(info);
+ }
+
+ } else if (info->shdw_pg_mode == NESTED_PAGING) {
+ rc |= v3_invalidate_nested_addr_range(info,reg->guest_start, reg->guest_end-1,NULL,NULL);
+ }
+ }
+ V3_Free(reg);
+ // flush virtual page tables
+ // 3 cases shadow, shadow passthrough, and nested
- return 0;
+ if (rc) { PrintError(vm, VCORE_NONE, "Error in deleting memory region\n"); }
}
+// Determine if a given address can be handled by a large page of the requested size
+uint32_t v3_get_max_page_size(struct guest_info * core, addr_t page_addr, v3_cpu_mode_t mode) {
+ addr_t pg_start = 0;
+ addr_t pg_end = 0;
+ uint32_t page_size = PAGE_SIZE_4KB;
+ struct v3_mem_region * reg = NULL;
+
+ switch (mode) {
+ case PROTECTED:
+ if (core->use_large_pages == 1) {
+ pg_start = PAGE_ADDR_4MB(page_addr);
+ pg_end = (pg_start + PAGE_SIZE_4MB);
+
+ reg = get_overlapping_region(core->vm_info, core->vcpu_id, pg_start, pg_end);
+
+ if ((reg) && ((reg->host_addr % PAGE_SIZE_4MB) == 0)) {
+ page_size = PAGE_SIZE_4MB;
+ }
+ }
+ break;
+ case PROTECTED_PAE:
+ if (core->use_large_pages == 1) {
+ pg_start = PAGE_ADDR_2MB(page_addr);
+ pg_end = (pg_start + PAGE_SIZE_2MB);
+
+ reg = get_overlapping_region(core->vm_info, core->vcpu_id, pg_start, pg_end);
+
+ if ((reg) && ((reg->host_addr % PAGE_SIZE_2MB) == 0)) {
+ page_size = PAGE_SIZE_2MB;
+ }
+ }
+ break;
+ case LONG:
+ case LONG_32_COMPAT:
+ case LONG_16_COMPAT:
+ if (core->use_giant_pages == 1) {
+ pg_start = PAGE_ADDR_1GB(page_addr);
+ pg_end = (pg_start + PAGE_SIZE_1GB);
+
+ reg = get_overlapping_region(core->vm_info, core->vcpu_id, pg_start, pg_end);
+
+ if ((reg) && ((reg->host_addr % PAGE_SIZE_1GB) == 0)) {
+ page_size = PAGE_SIZE_1GB;
+ break;
+ }
+ }
+
+ if (core->use_large_pages == 1) {
+ pg_start = PAGE_ADDR_2MB(page_addr);
+ pg_end = (pg_start + PAGE_SIZE_2MB);
+
+ reg = get_overlapping_region(core->vm_info, core->vcpu_id, pg_start, pg_end);
+
+ if ((reg) && ((reg->host_addr % PAGE_SIZE_2MB) == 0)) {
+ page_size = PAGE_SIZE_2MB;
+ }
+ }
+ break;
+ default:
+ PrintError(core->vm_info, core, "Invalid CPU mode: %s\n", v3_cpu_mode_to_str(v3_get_vm_cpu_mode(core)));
+ return -1;
+ }
+ return page_size;
+}
-int main(int argc, char ** argv) {
- struct vmm_os_hooks dummy_hooks;
- os_hooks = &dummy_hooks;
- vmm_mem_layout_t layout;
- vmm_mem_list_t list;
- os_hooks->malloc = &TestMalloc;
- os_hooks->free = &free;
- os_hooks->print_debug = &TestPrint;
- os_hooks->allocate_pages = &TestAllocatePages;
+void v3_print_mem_map(struct v3_vm_info * vm) {
+ struct v3_mem_map * map = &(vm->mem_map);
+ struct rb_node * node = v3_rb_first(&(vm->mem_map.mem_regions));
+ struct v3_mem_region * reg = NULL;
+ int i = 0;
+ V3_Print(vm, VCORE_NONE, "Memory Layout (all cores):\n");
+
+ V3_Print(vm, VCORE_NONE, "Base Memory: (%d regions)\n", map->num_base_regions);
+ for (i = 0; i < map->num_base_regions; i++) {
+ reg = &(map->base_regions[i]);
- printf("mem_list_add_test_1: %d\n", mem_list_add_test_1(&list));
- printf("layout_add_test_1: %d\n", mem_layout_add_test_1(&layout));
+ V3_Print(vm, VCORE_NONE, "Base Region[%d] (all cores): 0x%p - 0x%p -> 0x%p\n",
+ i,
+ (void *)(reg->guest_start),
+ (void *)(reg->guest_end - 1),
+ (void *)(reg->host_addr));
+
+ }
- return 0;
-}
-#endif
+ // If the memory map is empty, don't print it
+ if (node == NULL) {
+ return;
+ }
+ do {
+ reg = rb_entry(node, struct v3_mem_region, tree_node);
+ V3_Print(vm, VCORE_NONE, "%d: 0x%p - 0x%p -> 0x%p\n", i,
+ (void *)(reg->guest_start),
+ (void *)(reg->guest_end - 1),
+ (void *)(reg->host_addr));
+
+ V3_Print(vm, VCORE_NONE, "\t(flags=0x%x) (core=0x%x) (unhandled = 0x%p)\n",
+ reg->flags.value,
+ reg->core_id,
+ reg->unhandled);
+
+ i++;
+ } while ((node = v3_rb_next(node)));
+}
+void v3_init_mem()
+{
+ char *arg = v3_lookup_option("mem_block_size");
+ if (arg) {
+ v3_mem_block_size = atoi(arg);
+ V3_Print(VM_NONE,VCORE_NONE,"memory block size set to %llu bytes\n",v3_mem_block_size);
+ } else {
+ V3_Print(VM_NONE,VCORE_NONE,"default memory block size of %llu bytes is in use\n",v3_mem_block_size);
+ }
+}
+void v3_deinit_mem()
+{
+ // currently nothing
+}
