*/
static int handle_2MB_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
- pte64_t * shadow_pt, pde64_2MB_t * large_guest_pde, int speculative);
+ pte64_t * shadow_pt, pde64_2MB_t * large_guest_pde);
static int handle_pte_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
- pte64_t * shadow_pt, pte64_t * guest_pt, int speculative);
+ pte64_t * shadow_pt, pte64_t * guest_pt);
static int handle_pde_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
- pde64_t * shadow_pd, pde64_t * guest_pd, int speculative);
+ pde64_t * shadow_pd, pde64_t * guest_pd);
static int handle_pdpe_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
- pdpe64_t * shadow_pdp, pdpe64_t * guest_pdp, int speculative);
+ pdpe64_t * shadow_pdp, pdpe64_t * guest_pdp);
-static inline int handle_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code, int speculative) {
+static inline int handle_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code) {
pml4e64_t * guest_pml = NULL;
pml4e64_t * shadow_pml = CR3_TO_PML4E64_VA(info->ctrl_regs.cr3);
addr_t guest_cr3 = CR3_TO_PML4E64_PA(info->shdw_pg_state.guest_cr3);
if (is_guest_pf(guest_pml4e_access, shadow_pml4e_access) == 1) {
PrintDebug("Injecting PML4E pf to guest: (guest access error=%d) (pf error code=%d)\n",
*(uint_t *)&guest_pml4e_access, *(uint_t *)&error_code);
- if (!speculative) {
- inject_guest_pf(info, fault_addr, error_code);
+ if (inject_guest_pf(info, fault_addr, error_code) == -1) {
+ PrintError("Could not inject guest page fault\n");
+ return -1;
}
return 0;
}
//
PrintDebug("Shadow Paging User access error (shadow_pml4e_access=0x%x, guest_pml4e_access=0x%x)\n",
shadow_pml4e_access, guest_pml4e_access);
- if (!speculative) {
- inject_guest_pf(info, fault_addr, error_code);
+ if (inject_guest_pf(info, fault_addr, error_code) == -1) {
+ PrintError("Could not inject guest page fault\n");
+ return -1;
}
return 0;
} else if ((shadow_pml4e_access != PT_ACCESS_NOT_PRESENT) &&
(shadow_pml4e_access != PT_ACCESS_OK)) {
// inject page fault in guest
- if (!speculative) {
- inject_guest_pf(info, fault_addr, error_code);
+ if (inject_guest_pf(info, fault_addr, error_code) == -1) {
+ PrintError("Could not inject guest page fault\n");
+ return -1;
}
PrintDebug("Unknown Error occurred (shadow_pde_access=%d)\n", shadow_pml4e_access);
PrintDebug("Manual Says to inject page fault into guest\n");
shadow_pml4e->present = 1;
shadow_pml4e->user_page = guest_pml4e->user_page;
shadow_pml4e->writable = guest_pml4e->writable;
-
- // VMM Specific options
- shadow_pml4e->write_through = 0;
- shadow_pml4e->cache_disable = 0;
- //
+ shadow_pml4e->cache_disable = guest_pml4e->cache_disable;
+ shadow_pml4e->write_through = guest_pml4e->write_through;
guest_pml4e->accessed = 1;
if (guest_pa_to_host_va(info, BASE_TO_PAGE_ADDR(guest_pml4e->pdp_base_addr), (addr_t *)&guest_pdp) == -1) {
// Machine check the guest
- PrintDebug("Invalid Guest PDP Address: 0x%p\n", (void *)BASE_TO_PAGE_ADDR(guest_pml4e->pdp_base_addr));
- if (!speculative) {
- v3_raise_exception(info, MC_EXCEPTION);
- }
+ PrintError("Invalid Guest PDP Address: 0x%p\n", (void *)BASE_TO_PAGE_ADDR(guest_pml4e->pdp_base_addr));
+ v3_raise_exception(info, MC_EXCEPTION);
return 0;
}
- if (handle_pdpe_shadow_pagefault_64(info, fault_addr, error_code, shadow_pdp, guest_pdp, speculative) == -1) {
+ if (handle_pdpe_shadow_pagefault_64(info, fault_addr, error_code, shadow_pdp, guest_pdp) == -1) {
PrintError("Error handling Page fault caused by PDPE\n");
return -1;
}
// For now we are not going to handle 1 Gigabyte pages
static int handle_pdpe_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
- pdpe64_t * shadow_pdp, pdpe64_t * guest_pdp, int speculative) {
+ pdpe64_t * shadow_pdp, pdpe64_t * guest_pdp) {
pt_access_status_t guest_pdpe_access;
pt_access_status_t shadow_pdpe_access;
pdpe64_t * guest_pdpe = (pdpe64_t *)&(guest_pdp[PDPE64_INDEX(fault_addr)]);
if (is_guest_pf(guest_pdpe_access, shadow_pdpe_access) == 1) {
PrintDebug("Injecting PDPE pf to guest: (guest access error=%d) (pf error code=%d)\n",
*(uint_t *)&guest_pdpe_access, *(uint_t *)&error_code);
- if (!speculative) {
- inject_guest_pf(info, fault_addr, error_code);
+ if (inject_guest_pf(info, fault_addr, error_code) == -1) {
+ PrintError("Could not inject guest page fault\n");
+ return -1;
}
return 0;
}
//
PrintDebug("Shadow Paging User access error (shadow_pdpe_access=0x%x, guest_pdpe_access=0x%x)\n",
shadow_pdpe_access, guest_pdpe_access);
- if (!speculative) {
- inject_guest_pf(info, fault_addr, error_code);
+ if (inject_guest_pf(info, fault_addr, error_code) == -1) {
+ PrintError("Could not inject guest page fault\n");
+ return -1;
}
return 0;
} else if ((shadow_pdpe_access != PT_ACCESS_NOT_PRESENT) &&
(shadow_pdpe_access != PT_ACCESS_OK)) {
// inject page fault in guest
- if (!speculative) {
- inject_guest_pf(info, fault_addr, error_code);
+ if (inject_guest_pf(info, fault_addr, error_code) == -1) {
+ PrintError("Could not inject guest page fault\n");
+ return -1;
}
PrintDebug("Unknown Error occurred (shadow_pde_access=%d)\n", shadow_pdpe_access);
PrintDebug("Manual Says to inject page fault into guest\n");
shadow_pdpe->present = 1;
shadow_pdpe->user_page = guest_pdpe->user_page;
shadow_pdpe->writable = guest_pdpe->writable;
-
- // VMM Specific options
- shadow_pdpe->write_through = 0;
- shadow_pdpe->cache_disable = 0;
- //
+ shadow_pdpe->write_through = guest_pdpe->write_through;
+ shadow_pdpe->cache_disable = guest_pdpe->cache_disable;
+
guest_pdpe->accessed = 1;
if (guest_pa_to_host_va(info, BASE_TO_PAGE_ADDR(guest_pdpe->pd_base_addr), (addr_t *)&guest_pd) == -1) {
// Machine check the guest
- PrintDebug("Invalid Guest PTE Address: 0x%p\n", (void *)BASE_TO_PAGE_ADDR(guest_pdpe->pd_base_addr));
- if (!speculative) {
- v3_raise_exception(info, MC_EXCEPTION);
- }
+ PrintError("Invalid Guest PTE Address: 0x%p\n", (void *)BASE_TO_PAGE_ADDR(guest_pdpe->pd_base_addr));
+ v3_raise_exception(info, MC_EXCEPTION);
return 0;
}
- if (handle_pde_shadow_pagefault_64(info, fault_addr, error_code, shadow_pd, guest_pd, speculative) == -1) {
+ if (handle_pde_shadow_pagefault_64(info, fault_addr, error_code, shadow_pd, guest_pd) == -1) {
PrintError("Error handling Page fault caused by PDE\n");
return -1;
}
static int handle_pde_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
- pde64_t * shadow_pd, pde64_t * guest_pd, int speculative) {
+ pde64_t * shadow_pd, pde64_t * guest_pd) {
pt_access_status_t guest_pde_access;
pt_access_status_t shadow_pde_access;
pde64_t * guest_pde = (pde64_t *)&(guest_pd[PDE64_INDEX(fault_addr)]);
if (is_guest_pf(guest_pde_access, shadow_pde_access) == 1) {
PrintDebug("Injecting PDE pf to guest: (guest access error=%d) (pf error code=%d)\n",
*(uint_t *)&guest_pde_access, *(uint_t *)&error_code);
- if (!speculative) {
- inject_guest_pf(info, fault_addr, error_code);
+ if (inject_guest_pf(info, fault_addr, error_code) == -1) {
+ PrintError("Could not inject guest page fault\n");
+ return -1;
}
return 0;
}
//
PrintDebug("Shadow Paging User access error (shadow_pdpe_access=0x%x, guest_pdpe_access=0x%x)\n",
shadow_pde_access, guest_pde_access);
- if (!speculative) {
- inject_guest_pf(info, fault_addr, error_code);
+ if (inject_guest_pf(info, fault_addr, error_code) == -1) {
+ PrintError("Could not inject guest page fault\n");
+ return -1;
}
return 0;
} else if ((shadow_pde_access != PT_ACCESS_NOT_PRESENT) &&
(shadow_pde_access != PT_ACCESS_OK)) {
// inject page fault in guest
- if (!speculative) {
- inject_guest_pf(info, fault_addr, error_code);
+ if (inject_guest_pf(info, fault_addr, error_code) == -1) {
+ PrintError("Could not inject guest page fault\n");
+ return -1;
}
PrintDebug("Unknown Error occurred (shadow_pde_access=%d)\n", shadow_pde_access);
PrintDebug("Manual Says to inject page fault into guest\n");
}
// VMM Specific options
- shadow_pde->write_through = 0;
- shadow_pde->cache_disable = 0;
- shadow_pde->global_page = 0;
+ shadow_pde->write_through = guest_pde->write_through;
+ shadow_pde->cache_disable = guest_pde->cache_disable;
+ shadow_pde->global_page = guest_pde->global_page;
//
guest_pde->accessed = 1;
if (guest_pde->large_page == 0) {
if (guest_pa_to_host_va(info, BASE_TO_PAGE_ADDR(guest_pde->pt_base_addr), (addr_t *)&guest_pt) == -1) {
// Machine check the guest
- PrintDebug("Invalid Guest PTE Address: 0x%p\n", (void *)BASE_TO_PAGE_ADDR(guest_pde->pt_base_addr));
- if (!speculative) {
- v3_raise_exception(info, MC_EXCEPTION);
- }
+ PrintError("Invalid Guest PTE Address: 0x%p\n", (void *)BASE_TO_PAGE_ADDR(guest_pde->pt_base_addr));
+ v3_raise_exception(info, MC_EXCEPTION);
return 0;
}
- if (handle_pte_shadow_pagefault_64(info, fault_addr, error_code, shadow_pt, guest_pt, speculative) == -1) {
+ if (handle_pte_shadow_pagefault_64(info, fault_addr, error_code, shadow_pt, guest_pt) == -1) {
PrintError("Error handling Page fault caused by PDE\n");
return -1;
}
} else {
- if (handle_2MB_shadow_pagefault_64(info, fault_addr, error_code, shadow_pt, (pde64_2MB_t *)guest_pde, speculative) == -1) {
+ if (handle_2MB_shadow_pagefault_64(info, fault_addr, error_code, shadow_pt, (pde64_2MB_t *)guest_pde) == -1) {
PrintError("Error handling large pagefault\n");
return -1;
}
static int handle_pte_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
- pte64_t * shadow_pt, pte64_t * guest_pt, int speculative) {
+ pte64_t * shadow_pt, pte64_t * guest_pt) {
pt_access_status_t guest_pte_access;
pt_access_status_t shadow_pte_access;
pte64_t * guest_pte = (pte64_t *)&(guest_pt[PTE64_INDEX(fault_addr)]);;
- if ((shdw_reg == NULL) ||
- (shdw_reg->host_type == SHDW_REGION_INVALID)) {
+ if (shdw_reg == NULL) {
// Inject a machine check in the guest
- PrintDebug("Invalid Guest Address in page table (0x%p)\n", (void *)guest_pa);
- if (!speculative) {
- v3_raise_exception(info, MC_EXCEPTION);
- }
+ PrintError("Invalid Guest Address in page table (0x%p)\n", (void *)guest_pa);
+ v3_raise_exception(info, MC_EXCEPTION);
return 0;
}
/* Was the page fault caused by the Guest's page tables? */
if (is_guest_pf(guest_pte_access, shadow_pte_access) == 1) {
+
PrintDebug("Access error injecting pf to guest (guest access error=%d) (pf error code=%d)\n",
- guest_pte_access, *(uint_t*)&error_code);
- if (!speculative) {
- inject_guest_pf(info, fault_addr, error_code);
+ guest_pte_access, *(uint_t*)&error_code);
+
+ if (inject_guest_pf(info, fault_addr, error_code) == -1) {
+ PrintError("Could not inject guest page fault\n");
+ return -1;
}
+
return 0;
}
shadow_pte->user_page = guest_pte->user_page;
//set according to VMM policy
- shadow_pte->write_through = 0;
- shadow_pte->cache_disable = 0;
- shadow_pte->global_page = 0;
+ shadow_pte->write_through = guest_pte->write_through;
+ shadow_pte->cache_disable = guest_pte->cache_disable;
+ shadow_pte->global_page = guest_pte->global_page;
//
guest_pte->accessed = 1;
shadow_pte->writable = 0;
}
- // dirty flag has been set, check if its in the cache
- /* if (find_pte_map(state->cached_ptes, PAGE_ADDR(guest_pa)) != NULL) { */
- /* if (error_code.write == 1) { */
- /* state->cached_cr3 = 0; */
- /* shadow_pte->writable = guest_pte->writable; */
- /* } else { */
- /* shadow_pte->writable = 0; */
- /* } */
- /* } */
// Write hooks trump all, and are set Read Only
if (shdw_reg->host_type == SHDW_REGION_WRITE_HOOK) {
shadow_pte->writable = guest_pte->writable;
}
- /* if (find_pte_map(state->cached_ptes, PAGE_ADDR(guest_pa)) != NULL) { */
- /* struct shadow_page_state * state = &(info->shdw_pg_state); */
- /* PrintDebug("Write operation on Guest PAge Table Page\n"); */
- /* state->cached_cr3 = 0; */
- /* } */
return 0;
} else {
- // Inject page fault into the guest
- if (!speculative) {
- inject_guest_pf(info, fault_addr, error_code);
+ // Inject page fault into the guest
+ if (inject_guest_pf(info, fault_addr, error_code) == -1) {
+ PrintError("Could not inject guest page fault\n");
+ return -1;
}
PrintError("PTE Page fault fell through... Not sure if this should ever happen\n");
PrintError("Manual Says to inject page fault into guest\n");
static int handle_2MB_shadow_pagefault_64(struct guest_info * info,
addr_t fault_addr, pf_error_t error_code,
- pte64_t * shadow_pt, pde64_2MB_t * large_guest_pde, int speculative)
+ pte64_t * shadow_pt, pde64_2MB_t * large_guest_pde)
{
pt_access_status_t shadow_pte_access = v3_can_access_pte64(shadow_pt, fault_addr, error_code);
pte64_t * shadow_pte = (pte64_t *)&(shadow_pt[PTE64_INDEX(fault_addr)]);
struct v3_shadow_region * shdw_reg = v3_get_shadow_region(info, guest_fault_pa);
- if ((shdw_reg == NULL) ||
- (shdw_reg->host_type == SHDW_REGION_INVALID)) {
+ if (shdw_reg == NULL) {
// Inject a machine check in the guest
- PrintDebug("Invalid Guest Address in page table (0x%p)\n", (void *)guest_fault_pa);
- if (!speculative) {
- v3_raise_exception(info, MC_EXCEPTION);
- }
- return -1;
+ PrintError("Invalid Guest Address in page table (0x%p)\n", (void *)guest_fault_pa);
+ v3_raise_exception(info, MC_EXCEPTION);
+ return 0;
}
if (shadow_pte_access == PT_ACCESS_OK) {
(shdw_reg->host_type == SHDW_REGION_WRITE_HOOK)) {
addr_t shadow_pa = v3_get_shadow_addr(shdw_reg, guest_fault_pa);
- PrintDebug("Shadow PA=%p, ShadowPTE=%p\n", (void *)shadow_pa, (void *)shadow_pte);
-
shadow_pte->page_base_addr = PAGE_BASE_ADDR(shadow_pa);
- PrintDebug("Test1\n");
shadow_pte->present = 1;
*/
shadow_pte->user_page = 1;
-
-
- /* if (find_pte_map(state->cached_ptes, PAGE_ADDR(guest_fault_pa)) != NULL) { */
- /* // Check if the entry is a page table... */
- /* PrintDebug("Marking page as Guest Page Table (large page)\n"); */
- /* shadow_pte->writable = 0; */
- /* } else */ if (shdw_reg->host_type == SHDW_REGION_WRITE_HOOK) {
+ if (shdw_reg->host_type == SHDW_REGION_WRITE_HOOK) {
shadow_pte->writable = 0;
} else {
shadow_pte->writable = 1;
}
//set according to VMM policy
- shadow_pte->write_through = 0;
- shadow_pte->cache_disable = 0;
- shadow_pte->global_page = 0;
+ shadow_pte->write_through = large_guest_pde->write_through;
+ shadow_pte->cache_disable = large_guest_pde->cache_disable;
+ shadow_pte->global_page = large_guest_pde->global_page;
//
} else {
- // Handle hooked pages as well as other special pages
- // if (handle_special_page_fault(info, fault_addr, guest_fault_pa, error_code) == -1) {
-
if (v3_handle_mem_full_hook(info, fault_addr, guest_fault_pa, shdw_reg, error_code) == -1) {
PrintError("Special Page Fault handler returned error for address: %p\n", (void *)fault_addr);
return -1;
}
}
-
- /* if (find_pte_map(state->cached_ptes, PAGE_ADDR(guest_fault_pa)) != NULL) { */
- /* struct shadow_page_state * state = &(info->shdw_pg_state); */
- /* PrintDebug("Write operation on Guest PAge Table Page (large page)\n"); */
- /* state->cached_cr3 = 0; */
- /* shadow_pte->writable = 1; */
- /* } */
-
} else {
PrintError("Error in large page fault handler...\n");
PrintError("This case should have been handled at the top level handler\n");