+++ /dev/null
-#include <geekos/vm_guest_mem.h>
-#include <geekos/vmm.h>
-#include <geekos/vmm_paging.h>
-
-extern struct vmm_os_hooks * os_hooks;
-
-
-/**********************************/
-/* GROUP 0 */
-/**********************************/
-
-int host_va_to_host_pa(addr_t host_va, addr_t * host_pa) {
- if ((os_hooks) && (os_hooks)->vaddr_to_paddr) {
-
- *host_pa = (addr_t)(os_hooks)->vaddr_to_paddr((void *)host_va);
-
- if (*host_pa == 0) {
- return -1;
- }
- } else {
- return -1;
- }
- return 0;
-}
-
-
-int host_pa_to_host_va(addr_t host_pa, addr_t * host_va) {
- if ((os_hooks) && (os_hooks)->paddr_to_vaddr) {
-
- *host_va = (addr_t)(os_hooks)->paddr_to_vaddr((void *)host_pa);
-
- if (*host_va == 0) {
- return -1;
- }
- } else {
- return -1;
- }
- return 0;
-}
-
-
-
-int guest_pa_to_host_pa(struct guest_info * guest_info, addr_t guest_pa, addr_t * host_pa) {
- // we use the shadow map here...
- if (lookup_shadow_map_addr(&(guest_info->mem_map), guest_pa, host_pa) != HOST_REGION_PHYSICAL_MEMORY) {
- return -1;
- }
-
- return 0;
-}
-
-
-/* !! Currently not implemented !! */
-// This is a scan of the shadow map
-// For now we ignore it
-//
-int host_pa_to_guest_pa(struct guest_info * guest_info, addr_t host_pa, addr_t * guest_pa) {
- *guest_pa = 0;
-
- return -1;
-}
-
-
-
-/**********************************/
-/* GROUP 1 */
-/**********************************/
-
-
-/* !! Currently not implemented !! */
-// This will return negative until we implement host_pa_to_guest_pa()
-int host_va_to_guest_pa(struct guest_info * guest_info, addr_t host_va, addr_t * guest_pa) {
- addr_t host_pa;
- *guest_pa = 0;
-
- if (host_va_to_host_pa(host_va, &host_pa) != 0) {
- return -1;
- }
-
- if (host_pa_to_guest_pa(guest_info, host_pa, guest_pa) != 0) {
- return -1;
- }
-
- return 0;
-}
-
-
-
-
-int guest_pa_to_host_va(struct guest_info * guest_info, addr_t guest_pa, addr_t * host_va) {
- addr_t host_pa;
-
- *host_va = 0;
-
- if (guest_pa_to_host_pa(guest_info, guest_pa, &host_pa) != 0) {
- return -1;
- }
-
- if (host_pa_to_host_va(host_pa, host_va) != 0) {
- return -1;
- }
-
- return 0;
-}
-
-
-int guest_va_to_guest_pa(struct guest_info * guest_info, addr_t guest_va, addr_t * guest_pa) {
- if (guest_info->page_mode == SHADOW_PAGING) {
- switch (guest_info->cpu_mode) {
- case REAL:
- case PROTECTED:
- case LONG:
- case PROTECTED_PAE:
- // guest virtual address is the same as the physical
- *guest_pa = guest_va;
- return 0;
- case PROTECTED_PG:
- {
- addr_t tmp_pa;
- pde32_t * pde;
- addr_t guest_pde = CR3_TO_PDE32(guest_info->shdw_pg_state.guest_cr3.r_reg);
-
- if (guest_pa_to_host_va(guest_info, guest_pde, (addr_t *)&pde) == -1) {
- return -1;
- }
-
- switch (pde32_lookup(pde, guest_va, &tmp_pa)) {
- case NOT_PRESENT:
- *guest_pa = 0;
- return -1;
- case LARGE_PAGE:
- *guest_pa = tmp_pa;
- return 0;
- case PTE32:
- {
- pte32_t * pte;
-
- if (guest_pa_to_host_va(guest_info, tmp_pa, (addr_t*)&pte) == -1) {
- return -1;
- }
-
- if (pte32_lookup(pte, guest_va, guest_pa) != 0) {
- return -1;
- }
-
- return 0;
- }
- default:
- return -1;
- }
- }
- case PROTECTED_PAE_PG:
- {
- // Fill in
- }
- case LONG_PG:
- {
- // Fill in
- }
- default:
- return -1;
- }
- } else if (guest_info->page_mode == NESTED_PAGING) {
-
- // Fill in
-
- } else {
- return -1;
- }
-
-
- return 0;
-}
-
-
-
-/* !! Currently not implemented !! */
-/* This will be a real pain.... its your standard page table walker in guest memory
- *
- * For now we ignore it...
- */
-int guest_pa_to_guest_va(struct guest_info * guest_info, addr_t guest_pa, addr_t * guest_va) {
- *guest_va = 0;
- return -1;
-}
-
-
-/**********************************/
-/* GROUP 2 */
-/**********************************/
-
-
-int guest_va_to_host_pa(struct guest_info * guest_info, addr_t guest_va, addr_t * host_pa) {
- addr_t guest_pa;
-
- *host_pa = 0;
-
- if (guest_va_to_guest_pa(guest_info, guest_va, &guest_pa) != 0) {
- return -1;
- }
-
- if (guest_pa_to_host_pa(guest_info, guest_pa, host_pa) != 0) {
- return -1;
- }
-
- return 0;
-}
-
-/* !! Currently not implemented !! */
-int host_pa_to_guest_va(struct guest_info * guest_info, addr_t host_pa, addr_t * guest_va) {
- addr_t guest_pa;
-
- *guest_va = 0;
-
- if (host_pa_to_guest_pa(guest_info, host_pa, &guest_pa) != 0) {
- return -1;
- }
-
- if (guest_pa_to_guest_va(guest_info, guest_pa, guest_va) != 0) {
- return -1;
- }
-
- return 0;
-}
-
-
-
-
-int guest_va_to_host_va(struct guest_info * guest_info, addr_t guest_va, addr_t * host_va) {
- addr_t guest_pa;
- addr_t host_pa;
-
- *host_va = 0;
-
- if (guest_va_to_guest_pa(guest_info, guest_va, &guest_pa) != 0) {
- return -1;
- }
-
- if (guest_pa_to_host_pa(guest_info, guest_pa, &host_pa) != 0) {
- return -1;
- }
-
- if (host_pa_to_host_va(host_pa, host_va) != 0) {
- return -1;
- }
-
- return 0;
-}
-
-
-/* !! Currently not implemented !! */
-int host_va_to_guest_va(struct guest_info * guest_info, addr_t host_va, addr_t * guest_va) {
- addr_t host_pa;
- addr_t guest_pa;
-
- *guest_va = 0;
-
- if (host_va_to_host_pa(host_va, &host_pa) != 0) {
- return -1;
- }
-
- if (host_pa_to_guest_pa(guest_info, host_pa, &guest_pa) != 0) {
- return -1;
- }
-
- if (guest_pa_to_guest_va(guest_info, guest_pa, guest_va) != 0) {
- return -1;
- }
-
- return 0;
-}
-
-
-
-
-
-
-/* This is a straight address conversion + copy,
- * except for the tiny little issue of crossing page boundries.....
- */
-int read_guest_va_memory(struct guest_info * guest_info, addr_t guest_va, int count, char * dest) {
- addr_t cursor = guest_va;
- int bytes_read = 0;
-
- while (count > 0) {
- int dist_to_pg_edge = (PAGE_OFFSET(cursor) + PAGE_SIZE) - cursor;
- int bytes_to_copy = (dist_to_pg_edge > count) ? count : dist_to_pg_edge;
- addr_t host_addr;
-
- if (guest_va_to_host_va(guest_info, cursor, &host_addr) != 0) {
- return bytes_read;
- }
-
- memcpy(dest + bytes_read, (void*)host_addr, bytes_to_copy);
-
- bytes_read += bytes_to_copy;
- count -= bytes_to_copy;
- cursor += bytes_to_copy;
- }
-
- return bytes_read;
-}
-
-
-
-
-
-
-/* This is a straight address conversion + copy,
- * except for the tiny little issue of crossing page boundries.....
- */
-int read_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, char * dest) {
- addr_t cursor = guest_pa;
- int bytes_read = 0;
-
- while (count > 0) {
- int dist_to_pg_edge = (PAGE_OFFSET(cursor) + PAGE_SIZE) - cursor;
- int bytes_to_copy = (dist_to_pg_edge > count) ? count : dist_to_pg_edge;
- addr_t host_addr;
-
- if (guest_pa_to_host_va(guest_info, cursor, &host_addr) != 0) {
- return bytes_read;
- }
-
- memcpy(dest + bytes_read, (void*)host_addr, bytes_to_copy);
-
- bytes_read += bytes_to_copy;
- count -= bytes_to_copy;
- cursor += bytes_to_copy;
- }
-
- return bytes_read;
-}
-
-
-
-
-/* This is a straight address conversion + copy,
- * except for the tiny little issue of crossing page boundries.....
- */
-int write_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, char * src) {
- addr_t cursor = guest_pa;
- int bytes_written = 0;
-
- while (count > 0) {
- int dist_to_pg_edge = (PAGE_OFFSET(cursor) + PAGE_SIZE) - cursor;
- int bytes_to_copy = (dist_to_pg_edge > count) ? count : dist_to_pg_edge;
- addr_t host_addr;
-
- if (guest_pa_to_host_va(guest_info, cursor, &host_addr) != 0) {
- return bytes_written;
- }
-
- memcpy((void*)host_addr, src + bytes_written, bytes_to_copy);
-
- bytes_written += bytes_to_copy;
- count -= bytes_to_copy;
- cursor += bytes_to_copy;
- }
-
- return bytes_written;
-}
-