1 #include <palacios/vm_guest_mem.h>
2 #include <palacios/vmm.h>
3 #include <palacios/vmm_paging.h>
5 extern struct vmm_os_hooks * os_hooks;
8 /**********************************/
10 /**********************************/
12 int host_va_to_host_pa(addr_t host_va, addr_t * host_pa) {
13 if ((os_hooks) && (os_hooks)->vaddr_to_paddr) {
15 *host_pa = (addr_t)(os_hooks)->vaddr_to_paddr((void *)host_va);
18 PrintDebug("In HVA->HPA: Invalid HVA(%x)->HPA lookup\n", host_va);
22 PrintDebug("In HVA->HPA: os_hooks not defined\n");
29 int host_pa_to_host_va(addr_t host_pa, addr_t * host_va) {
30 if ((os_hooks) && (os_hooks)->paddr_to_vaddr) {
32 *host_va = (addr_t)(os_hooks)->paddr_to_vaddr((void *)host_pa);
35 PrintDebug("In HPA->HVA: Invalid HPA(%x)->HVA lookup\n", host_pa);
39 PrintDebug("In HPA->HVA: os_hooks not defined\n");
47 int guest_pa_to_host_pa(struct guest_info * guest_info, addr_t guest_pa, addr_t * host_pa) {
48 // we use the shadow map here...
49 if (lookup_shadow_map_addr(&(guest_info->mem_map), guest_pa, host_pa) != HOST_REGION_PHYSICAL_MEMORY) {
50 PrintDebug("In GPA->HPA: Could not find address in shadow map (addr=%x)\n", guest_pa);
58 /* !! Currently not implemented !! */
59 // This is a scan of the shadow map
60 // For now we ignore it
62 int host_pa_to_guest_pa(struct guest_info * guest_info, addr_t host_pa, addr_t * guest_pa) {
64 PrintDebug("ERROR!!! HPA->GPA currently not implemented!!!\n");
71 /**********************************/
73 /**********************************/
76 /* !! Currently not implemented !! */
77 // This will return negative until we implement host_pa_to_guest_pa()
78 int host_va_to_guest_pa(struct guest_info * guest_info, addr_t host_va, addr_t * guest_pa) {
82 if (host_va_to_host_pa(host_va, &host_pa) != 0) {
83 PrintDebug("In HVA->GPA: Invalid HVA(%x)->HPA lookup\n", host_va);
87 if (host_pa_to_guest_pa(guest_info, host_pa, guest_pa) != 0) {
88 PrintDebug("In HVA->GPA: Invalid HPA(%x)->GPA lookup\n", host_pa);
98 int guest_pa_to_host_va(struct guest_info * guest_info, addr_t guest_pa, addr_t * host_va) {
103 if (guest_pa_to_host_pa(guest_info, guest_pa, &host_pa) != 0) {
104 PrintDebug("In GPA->HVA: Invalid GPA(%x)->HPA lookup\n", guest_pa);
108 if (host_pa_to_host_va(host_pa, host_va) != 0) {
109 PrintDebug("In GPA->HVA: Invalid HPA(%x)->HVA lookup\n", host_pa);
117 int guest_va_to_guest_pa(struct guest_info * guest_info, addr_t guest_va, addr_t * guest_pa) {
118 if (guest_info->page_mode == SHADOW_PAGING) {
119 switch (guest_info->cpu_mode) {
124 // guest virtual address is the same as the physical
125 *guest_pa = guest_va;
131 addr_t guest_pde = CR3_TO_PDE32(guest_info->shdw_pg_state.guest_cr3);
133 if (guest_pa_to_host_va(guest_info, guest_pde, (addr_t *)&pde) == -1) {
134 PrintDebug("In GVA->GPA: Invalid GPA(%x)->HVA PDE32 lookup\n", guest_pde);
139 switch (pde32_lookup(pde, guest_va, &tmp_pa)) {
140 case PDE32_ENTRY_NOT_PRESENT:
143 case PDE32_ENTRY_LARGE_PAGE:
146 case PDE32_ENTRY_PTE32:
151 if (guest_pa_to_host_va(guest_info, tmp_pa, (addr_t*)&pte) == -1) {
152 PrintDebug("In GVA->GPA: Invalid GPA(%x)->HVA PTE32 lookup\n", guest_pa);
156 PrintDebug("PTE host addr=%x, GVA=%x, GPA=%x(should be 0)\n", pte, guest_va, *guest_pa);
158 if (pte32_lookup(pte, guest_va, guest_pa) != 0) {
159 PrintDebug("In GVA->GPA: PTE32 Lookup failure GVA=%x; PTE=%x\n", guest_va, pte);
160 // PrintPT32(PDE32_INDEX(guest_va) << 22, pte);
170 case PROTECTED_PAE_PG:
181 } else if (guest_info->page_mode == NESTED_PAGING) {
195 /* !! Currently not implemented !! */
196 /* This will be a real pain.... its your standard page table walker in guest memory
198 * For now we ignore it...
200 int guest_pa_to_guest_va(struct guest_info * guest_info, addr_t guest_pa, addr_t * guest_va) {
202 PrintDebug("ERROR!!: GPA->GVA Not Implemented!!\n");
207 /**********************************/
209 /**********************************/
212 int guest_va_to_host_pa(struct guest_info * guest_info, addr_t guest_va, addr_t * host_pa) {
217 if (guest_va_to_guest_pa(guest_info, guest_va, &guest_pa) != 0) {
218 PrintDebug("In GVA->HPA: Invalid GVA(%x)->GPA lookup\n", guest_va);
222 if (guest_pa_to_host_pa(guest_info, guest_pa, host_pa) != 0) {
223 PrintDebug("In GVA->HPA: Invalid GPA(%x)->HPA lookup\n", guest_pa);
230 /* !! Currently not implemented !! */
231 int host_pa_to_guest_va(struct guest_info * guest_info, addr_t host_pa, addr_t * guest_va) {
236 if (host_pa_to_guest_pa(guest_info, host_pa, &guest_pa) != 0) {
237 PrintDebug("In HPA->GVA: Invalid HPA(%x)->GPA lookup\n", host_pa);
241 if (guest_pa_to_guest_va(guest_info, guest_pa, guest_va) != 0) {
242 PrintDebug("In HPA->GVA: Invalid GPA(%x)->GVA lookup\n", guest_pa);
252 int guest_va_to_host_va(struct guest_info * guest_info, addr_t guest_va, addr_t * host_va) {
258 if (guest_va_to_guest_pa(guest_info, guest_va, &guest_pa) != 0) {
259 PrintDebug("In GVA->HVA: Invalid GVA(%x)->GPA lookup\n", guest_va);
263 if (guest_pa_to_host_pa(guest_info, guest_pa, &host_pa) != 0) {
264 PrintDebug("In GVA->HVA: Invalid GPA(%x)->HPA lookup\n", guest_pa);
268 if (host_pa_to_host_va(host_pa, host_va) != 0) {
269 PrintDebug("In GVA->HVA: Invalid HPA(%x)->HVA lookup\n", host_pa);
277 /* !! Currently not implemented !! */
278 int host_va_to_guest_va(struct guest_info * guest_info, addr_t host_va, addr_t * guest_va) {
284 if (host_va_to_host_pa(host_va, &host_pa) != 0) {
285 PrintDebug("In HVA->GVA: Invalid HVA(%x)->HPA lookup\n", host_va);
289 if (host_pa_to_guest_pa(guest_info, host_pa, &guest_pa) != 0) {
290 PrintDebug("In HVA->GVA: Invalid HPA(%x)->GPA lookup\n", host_va);
294 if (guest_pa_to_guest_va(guest_info, guest_pa, guest_va) != 0) {
295 PrintDebug("In HVA->GVA: Invalid GPA(%x)->GVA lookup\n", guest_pa);
307 /* This is a straight address conversion + copy,
308 * except for the tiny little issue of crossing page boundries.....
310 int read_guest_va_memory(struct guest_info * guest_info, addr_t guest_va, int count, char * dest) {
311 addr_t cursor = guest_va;
317 int dist_to_pg_edge = (PAGE_ADDR(cursor) + PAGE_SIZE) - cursor;
318 int bytes_to_copy = (dist_to_pg_edge > count) ? count : dist_to_pg_edge;
319 addr_t host_addr = 0;
321 if (guest_va_to_host_va(guest_info, cursor, &host_addr) != 0) {
322 PrintDebug("Invalid GVA(%x)->HVA lookup\n", cursor);
326 memcpy(dest + bytes_read, (void*)host_addr, bytes_to_copy);
328 bytes_read += bytes_to_copy;
329 count -= bytes_to_copy;
330 cursor += bytes_to_copy;
341 /* This is a straight address conversion + copy,
342 * except for the tiny little issue of crossing page boundries.....
344 int read_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, char * dest) {
345 addr_t cursor = guest_pa;
349 int dist_to_pg_edge = (PAGE_ADDR(cursor) + PAGE_SIZE) - cursor;
350 int bytes_to_copy = (dist_to_pg_edge > count) ? count : dist_to_pg_edge;
351 addr_t host_addr = 0;
353 if (guest_pa_to_host_va(guest_info, cursor, &host_addr) != 0) {
359 PrintDebug("Trying to read %d bytes\n", bytes_to_copy);
360 PrintDebug("Dist to page edge=%d\n", dist_to_pg_edge);
361 PrintDebug("PAGE_ADDR=0x%x\n", PAGE_ADDR(cursor));
362 PrintDebug("guest_pa=0x%x\n", guest_pa);
365 memcpy(dest + bytes_read, (void*)host_addr, bytes_to_copy);
367 bytes_read += bytes_to_copy;
368 count -= bytes_to_copy;
369 cursor += bytes_to_copy;
378 /* This is a straight address conversion + copy,
379 * except for the tiny little issue of crossing page boundries.....
381 int write_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, char * src) {
382 addr_t cursor = guest_pa;
383 int bytes_written = 0;
386 int dist_to_pg_edge = (PAGE_ADDR(cursor) + PAGE_SIZE) - cursor;
387 int bytes_to_copy = (dist_to_pg_edge > count) ? count : dist_to_pg_edge;
390 if (guest_pa_to_host_va(guest_info, cursor, &host_addr) != 0) {
391 return bytes_written;
395 memcpy((void*)host_addr, src + bytes_written, bytes_to_copy);
397 bytes_written += bytes_to_copy;
398 count -= bytes_to_copy;
399 cursor += bytes_to_copy;
402 return bytes_written;