#include <palacios/vm_guest_mem.h>
#include <palacios/vm_guest.h>
+/* This always builds 3 level page tables - no large pages */
static inline int handle_passthrough_pagefault_32pae(struct guest_info * info,
addr_t fault_addr,
- pf_error_t error_code) {
+ pf_error_t error_code,
+ addr_t *actual_start, addr_t *actual_end) {
pdpe32pae_t * pdpe = NULL;
pde32pae_t * pde = NULL;
pte32pae_t * pte = NULL;
int pdpe_index = PDPE32PAE_INDEX(fault_addr);
int pde_index = PDE32PAE_INDEX(fault_addr);
int pte_index = PTE32PAE_INDEX(fault_addr);
+
struct v3_mem_region * region = v3_get_mem_region(info->vm_info, info->vcpu_id, fault_addr);
return -1;
}
+ PrintDebug(info->vm_info, info, "Direct Paging 32PAE page fault handler=%p\n", (void *)fault_addr);
+
// Lookup the correct PDPE address based on the PAGING MODE
if (info->shdw_pg_mode == SHADOW_PAGING) {
pdpe = CR3_TO_PDPE32PAE_VA(info->ctrl_regs.cr3);
} else {
pdpe = CR3_TO_PDPE32PAE_VA(info->direct_map_pt);
}
-
+
+ PrintDebug(info->vm_info, info, "Top level pdpe error pdp address=%p\n", (void *)pdpe);
// Fix up the PDPE entry
if (pdpe[pdpe_index].present == 0) {
pde = (pde32pae_t *)create_generic_pt_page(info);
-
+ PrintDebug(info->vm_info, info, "Creating a new pd page=%p\n", (void *)pde);
pdpe[pdpe_index].present = 1;
// Set default PDPE Flags...
pdpe[pdpe_index].pd_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pde));
} else {
pde = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pdpe[pdpe_index].pd_base_addr));
}
+ PrintDebug(info->vm_info, info, "Handling pde error pd base address =%p\n", (void *)pde);
+ *actual_start = BASE_TO_PAGE_ADDR_4KB(PAGE_BASE_ADDR_4KB(fault_addr));
+ *actual_end = BASE_TO_PAGE_ADDR_4KB(PAGE_BASE_ADDR_4KB(fault_addr)+1)-1;
// Fix up the PDE entry
if (pde[pde_index].present == 0) {
pte = (pte32pae_t *)create_generic_pt_page(info);
-
+ PrintDebug(info->vm_info, info, "Creating a new pt page=%p\n", (void *)pte);
pde[pde_index].present = 1;
pde[pde_index].writable = 1;
pde[pde_index].user_page = 1;
pte = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pde[pde_index].pt_base_addr));
}
+ PrintDebug(info->vm_info, info, "Handling pte error pt base address=%p\n", (void *)pte);
+
// Fix up the PTE entry
if (pte[pte_index].present == 0) {
}
pte[pte_index].page_base_addr = PAGE_BASE_ADDR(host_addr);
+ PrintDebug(info->vm_info, info, "PTE mapped to =%p\n", (void *)host_addr);
+ PrintDebug(info->vm_info, info, "PTE is =%llx\n", *(uint64_t *)&(pte[pte_index]));
} else {
return region->unhandled(info, fault_addr, fault_addr, region, error_code);
}
} else {
return region->unhandled(info, fault_addr, fault_addr, region, error_code);
}
+
+ PrintDebug(info->vm_info, info, "Handler ends with fault address=%p\n", (void *)fault_addr);
return 0;
}
-static inline int invalidate_addr_32pae(struct guest_info * core, addr_t inv_addr)
+static inline int invalidate_addr_32pae(struct guest_info * core, addr_t inv_addr,
+ addr_t *actual_start, addr_t *actual_end)
{
- addr_t start;
uint64_t len;
+ int rc;
- return invalidate_addr_32pae_internal(core,inv_addr,&start,&len);
+ rc = invalidate_addr_32pae_internal(core,inv_addr,actual_start,&len);
+
+ *actual_end = *actual_start + len - 1;
+
+ return rc;
+
+
}
-static inline int invalidate_addr_32pae_range(struct guest_info * core, addr_t inv_addr_start, addr_t inv_addr_end)
+static inline int invalidate_addr_32pae_range(struct guest_info * core, addr_t inv_addr_start, addr_t inv_addr_end,
+ addr_t *actual_start, addr_t *actual_end)
{
addr_t next;
addr_t start;
for (next=inv_addr_start; next<=inv_addr_end; ) {
rc = invalidate_addr_32pae_internal(core,next,&start, &len);
+ if (next==inv_addr_start) {
+ // first iteration, capture where we start invalidating
+ *actual_start = start;
+ }
if (rc) {
return rc;
}
next = start + len;
+ *actual_end = next;
}
+ // last iteration, actual_end is off by one
+ (*actual_end)--;
return 0;
}