#include <palacios/vm_guest_mem.h>
#include <palacios/vm_guest.h>
+
+#ifndef CONFIG_DEBUG_NESTED_PAGING
+#undef PrintDebug
+#define PrintDebug(fmt, args...)
+#endif
+
+
static addr_t create_generic_pt_page() {
- void * page = 0;
- page = V3_VAddr(V3_AllocPages(1));
- memset(page, 0, PAGE_SIZE);
+ void * page = 0;
+ page = V3_VAddr(V3_AllocPages(1));
+ memset(page, 0, PAGE_SIZE);
- return (addr_t)page;
+ return (addr_t)page;
}
// Inline handler functions for each cpu mode
#include "vmm_direct_paging_32.h"
#include "vmm_direct_paging_32pae.h"
+#include "vmm_direct_paging_64.h"
+
+int v3_init_passthrough_pts(struct guest_info * info) {
+ info->direct_map_pt = (addr_t)V3_PAddr((void *)create_generic_pt_page());
+ return 0;
+}
+
+int v3_reset_passthrough_pts(struct guest_info * info) {
+ v3_cpu_mode_t mode = v3_get_vm_cpu_mode(info);
+
+ // Delete the old direct map page tables
+ switch(mode) {
+ case REAL:
+ case PROTECTED:
+ delete_page_tables_32((pde32_t *)V3_VAddr((void *)(info->direct_map_pt)));
+ break;
+ case PROTECTED_PAE:
+ case LONG:
+ case LONG_32_COMPAT:
+ // Long mode will only use 32PAE page tables...
+ delete_page_tables_32pae((pdpe32pae_t *)V3_VAddr((void *)(info->direct_map_pt)));
+ break;
+ default:
+ PrintError("Unknown CPU Mode\n");
+ break;
+ }
+
+ // create new direct map page table
+ v3_init_passthrough_pts(info);
+
+ return 0;
+}
+
+int v3_activate_passthrough_pt(struct guest_info * info) {
+ // For now... But we need to change this....
+ // As soon as shadow paging becomes active the passthrough tables are hosed
+ // So this will cause chaos if it is called at that time
-addr_t v3_create_direct_passthrough_pts(struct guest_info * info) {
- return create_generic_pt_page();
+ info->ctrl_regs.cr3 = *(addr_t*)&(info->direct_map_pt);
+ //PrintError("Activate Passthrough Page tables not implemented\n");
+ return 0;
}
+
int v3_handle_passthrough_pagefault(struct guest_info * info, addr_t fault_addr, pf_error_t error_code) {
- v3_vm_cpu_mode_t mode = v3_get_cpu_mode(info);
-
- switch(mode) {
- case REAL:
- case PROTECTED:
- return handle_passthrough_pagefault_32(info, fault_addr, error_code);
- case PROTECTED_PAE:
- return handle_passthrough_pagefault_32pae(info, fault_addr, error_code);
- case LONG:
- break;
- case LONG_32_COMPAT:
- break;
- default:
- PrintError("Unknown CPU Mode\n");
- break;
- }
- return -1;
+ v3_cpu_mode_t mode = v3_get_vm_cpu_mode(info);
+
+ switch(mode) {
+ case REAL:
+ case PROTECTED:
+ return handle_passthrough_pagefault_32(info, fault_addr, error_code);
+
+ case PROTECTED_PAE:
+ case LONG:
+ case LONG_32_COMPAT:
+ // Long mode will only use 32PAE page tables...
+ return handle_passthrough_pagefault_32pae(info, fault_addr, error_code);
+
+ default:
+ PrintError("Unknown CPU Mode\n");
+ break;
+ }
+ return -1;
+}
+
+
+
+int v3_handle_nested_pagefault(struct guest_info * info, addr_t fault_addr, pf_error_t error_code) {
+ v3_cpu_mode_t mode = v3_get_host_cpu_mode();
+
+
+ PrintDebug("Nested PageFault: fault_addr=%p, error_code=%u\n", (void *)fault_addr, *(uint_t *)&error_code);
+
+ switch(mode) {
+ case REAL:
+ case PROTECTED:
+ return handle_passthrough_pagefault_32(info, fault_addr, error_code);
+
+ case PROTECTED_PAE:
+ return handle_passthrough_pagefault_32pae(info, fault_addr, error_code);
+
+ case LONG:
+ case LONG_32_COMPAT:
+ return handle_passthrough_pagefault_64(info, fault_addr, error_code);
+
+ default:
+ PrintError("Unknown CPU Mode\n");
+ break;
+ }
+ return -1;
+}
+
+int v3_invalidate_passthrough_addr(struct guest_info * info, addr_t inv_addr) {
+ v3_cpu_mode_t mode = v3_get_vm_cpu_mode(info);
+
+ switch(mode) {
+ case REAL:
+ case PROTECTED:
+ return invalidate_addr_32(info, inv_addr);
+
+ case PROTECTED_PAE:
+ case LONG:
+ case LONG_32_COMPAT:
+ // Long mode will only use 32PAE page tables...
+ return invalidate_addr_32pae(info, inv_addr);
+
+ default:
+ PrintError("Unknown CPU Mode\n");
+ break;
+ }
+ return -1;
+}
+
+
+int v3_invalidate_nested_addr(struct guest_info * info, addr_t inv_addr) {
+ v3_cpu_mode_t mode = LONG;
+
+ switch(mode) {
+ case REAL:
+ case PROTECTED:
+ return invalidate_addr_32(info, inv_addr);
+
+ case PROTECTED_PAE:
+ return invalidate_addr_32pae(info, inv_addr);
+
+ case LONG:
+ case LONG_32_COMPAT:
+ return invalidate_addr_64(info, inv_addr);
+
+ default:
+ PrintError("Unknown CPU Mode\n");
+ break;
+ }
+
+ return -1;
}