PrintDebug("Access error injecting pf to guest (guest access error=%d) (pf error code=%d)\n",
guest_pte_access, *(uint_t*)&error_code);
+
#ifdef CONFIG_SYMBIOTIC_SWAP
- if ((error_code.write == 0) && (is_swapped_pte32(guest_pte))) {
- PrintError("Page fault on swapped out page (pte=%x)\n", *(uint32_t *)guest_pte);
-
- addr_t swp_pg_addr = v3_get_swapped_pg_addr(info, shadow_pte, guest_pte);
+ if (is_swapped_pte32(guest_pte)) {
- if (swp_pg_addr == 0) {
- if (inject_guest_pf(info, fault_addr, error_code) == -1) {
- PrintError("Could not inject guest page fault\n");
- return -1;
- }
+#ifdef CONFIG_SYMBIOTIC_SWAP_TELEMETRY
+ if (error_code.write == 0) {
+ info->swap_state.read_faults++;
} else {
- /*
- * Setup shadow paging state
- */
+ info->swap_state.write_faults++;
+ }
+#endif
+ if (error_code.write == 0) {
+ PrintError("Page fault on swapped out page (pte=%x) (error_code=%x)\n", *(uint32_t *)guest_pte, *(uint32_t *)&error_code);
- /* We need some way to check permissions.... */
+ addr_t swp_pg_addr = v3_get_swapped_pg_addr(info, shadow_pte, guest_pte);
- shadow_pte->accessed = 1;
- shadow_pte->writable = 0;
-
- if (fault_addr & 0xc0000000) {
- shadow_pte->user_page = 0;
+ if (swp_pg_addr == 0) {
+ if (inject_guest_pf(info, fault_addr, error_code) == -1) {
+ PrintError("Could not inject guest page fault\n");
+ return -1;
+ }
} else {
- shadow_pte->user_page = 1;
+ /*
+ * Setup shadow paging state
+ */
+
+ /* We need some way to check permissions.... */
+
+ shadow_pte->accessed = 1;
+ shadow_pte->writable = 0;
+
+ if (fault_addr & 0xc0000000) {
+ shadow_pte->user_page = 0;
+ } else {
+ shadow_pte->user_page = 1;
+ }
+
+ shadow_pte->write_through = 0;
+ shadow_pte->cache_disable = 0;
+ shadow_pte->global_page = 0;
+
+ shadow_pte->present = 1;
+
+ shadow_pte->page_base_addr = swp_pg_addr;
}
-
- shadow_pte->write_through = 0;
- shadow_pte->cache_disable = 0;
- shadow_pte->global_page = 0;
-
- shadow_pte->present = 1;
- shadow_pte->page_base_addr = swp_pg_addr;
- }
- } else {
- if (inject_guest_pf(info, fault_addr, error_code) == -1) {
- PrintError("Could not inject guest page fault\n");
- return -1;
+ return 0;
}
}
-#else
+#endif
+
+
if (inject_guest_pf(info, fault_addr, error_code) == -1) {
PrintError("Could not inject guest page fault\n");
return -1;
- }
-#endif
+ }
return 0;
}
#include <palacios/vmm_list.h>
+#ifdef CONFIG_SYMBIOTIC_SWAP_TELEMETRY
+#include <palacios/vmm_telemetry.h>
+#endif
+
// This is a hack and 32 bit linux specific.... need to fix...
struct swap_pte {
uint32_t present : 1;
+#ifdef CONFIG_SYMBIOTIC_SWAP_TELEMETRY
+static void telemetry_cb(struct guest_info * info, void * private_data) {
+ struct v3_sym_swap_state * swap_state = &(info->swap_state);
+
+ V3_Print("Symbiotic Swap:\n");
+ V3_Print("\tRead faults=%d\n", swap_state->read_faults);
+ V3_Print("\tWrite faults=%d\n", swap_state->write_faults);
+ V3_Print("\tFlushes=%d\n", swap_state->flushes);
+}
+#endif
+
+
int v3_init_sym_swap(struct guest_info * info) {
- memset(&(info->swap_state), 0, sizeof(struct v3_sym_swap_state));
- info->swap_state.shdw_ptr_ht = v3_create_htable(0, swap_hash_fn, swap_eq_fn);
+ struct v3_sym_swap_state * swap_state = &(info->swap_state);
+
+ memset(swap_state, 0, sizeof(struct v3_sym_swap_state));
+ swap_state->shdw_ptr_ht = v3_create_htable(0, swap_hash_fn, swap_eq_fn);
+
+#ifdef CONFIG_SYMBIOTIC_SWAP_TELEMETRY
+ if (info->enable_telemetry) {
+ v3_add_telemetry_cb(info, telemetry_cb, NULL);
+ }
+#endif
PrintDebug("Initialized Symbiotic Swap\n");
PrintDebug("Flushing Symbiotic Swap table\n");
+#ifdef CONFIG_SYMBIOTIC_SWAP_TELEMETRY
+ swap_state->flushes++;
+#endif
+
while (ht_iter->entry) {
struct shadow_pointer * tmp_shdw_ptr = NULL;
struct shadow_pointer * shdw_ptr = NULL;