X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_paging.c;h=3d0cb198af5e9d60722e7071f6ba2ba9615c2d34;hb=b2abe5326ecb16090666eb45a8b7373f80b8eb2c;hp=5d56ada8ab6a17c64b6cd504403cf33515e7e2bb;hpb=9058e2656483cff772bcaecd1599665d0ea5f04d;p=palacios.git diff --git a/palacios/src/palacios/vmm_paging.c b/palacios/src/palacios/vmm_paging.c index 5d56ada..3d0cb19 100644 --- a/palacios/src/palacios/vmm_paging.c +++ b/palacios/src/palacios/vmm_paging.c @@ -63,109 +63,418 @@ void delete_page_tables_64(pml4e64_t * pml4) { int translate_guest_pt_32(struct guest_info * info, addr_t guest_cr3, addr_t vaddr, addr_t * paddr) { - addr_t guest_pde_pa = CR3_TO_PDE32_PA((void *)guest_cr3); + addr_t guest_pde_pa = CR3_TO_PDE32_PA(guest_cr3); pde32_t * guest_pde = 0; + addr_t guest_pte_pa = 0; if (guest_pa_to_host_va(info, guest_pde_pa, (addr_t*)&guest_pde) == -1) { - PrintError("In GVA->GPA: Invalid GPA(%p)->HVA PDE32 lookup\n", - (void *)guest_pde); + PrintError("Could not get virtual address of Guest PDE32 (PA=%p)\n", + (void *)guest_pde_pa); return -1; } + switch (pde32_lookup(guest_pde, vaddr, &guest_pte_pa)) { + case PT_ENTRY_NOT_PRESENT: + *paddr = 0; + return -1; + case PT_ENTRY_LARGE_PAGE: + *paddr = guest_pte_pa; + return 0; + case PT_ENTRY_PAGE: + { + pte32_t * guest_pte = NULL; + + if (guest_pa_to_host_va(info, guest_pte_pa, (addr_t*)&guest_pte) == -1) { + PrintError("Could not get virtual address of Guest PTE32 (PA=%p)\n", + (void *)guest_pte_pa); + return -1; + } - return -1; -} - + if (pte32_lookup(guest_pte, vaddr, paddr) == PT_ENTRY_NOT_PRESENT) { + return -1; + } -int translate_host_pt_32(addr_t host_cr3, addr_t vaddr, addr_t * paddr) { + return 0; + } + } - return -1; + return 0; } +int translate_guest_pt_32pae(struct guest_info * info, addr_t guest_cr3, addr_t vaddr, addr_t * paddr) { + addr_t guest_pdpe_pa = CR3_TO_PDPE32PAE_PA(guest_cr3); + pdpe32pae_t * guest_pdpe = 0; + addr_t guest_pde_pa = 0; + if (guest_pa_to_host_va(info, guest_pdpe_pa, (addr_t*)&guest_pdpe) == -1) { + PrintError("Could not get virtual address of Guest PDPE32PAE (PA=%p)\n", + (void *)guest_pdpe_pa); + return -1; + } + switch (pdpe32pae_lookup(guest_pdpe, vaddr, &guest_pde_pa)) + { + case PT_ENTRY_NOT_PRESENT: + *paddr = 0; + return -1; + case PT_ENTRY_PAGE: + { + pde32pae_t * guest_pde = NULL; + addr_t guest_pte_pa = 0; + + if (guest_pa_to_host_va(info, guest_pde_pa, (addr_t *)&guest_pde) == -1) { + PrintError("Could not get virtual Address of Guest PDE32PAE (PA=%p)\n", + (void *)guest_pde_pa); + return -1; + } + + switch (pde32pae_lookup(guest_pde, vaddr, &guest_pte_pa)) + { + case PT_ENTRY_NOT_PRESENT: + *paddr = 0; + return -1; + case PT_ENTRY_LARGE_PAGE: + *paddr = guest_pte_pa; + return 0; + case PT_ENTRY_PAGE: + { + pte32pae_t * guest_pte = NULL; + + if (guest_pa_to_host_va(info, guest_pte_pa, (addr_t *)&guest_pte) == -1) { + PrintError("Could not get virtual Address of Guest PTE32PAE (PA=%p)\n", + (void *)guest_pte_pa); + return -1; + } + + if (pte32pae_lookup(guest_pte, vaddr, paddr) == PT_ENTRY_NOT_PRESENT) { + return -1; + } + + return 0; + } + } + } + default: + return -1; + } + + return 0; +} +int translate_guest_pt_64(struct guest_info * info, addr_t guest_cr3, addr_t vaddr, addr_t * paddr) { + addr_t guest_pml4_pa = CR3_TO_PML4E64_PA(guest_cr3); + pml4e64_t * guest_pml = 0; + addr_t guest_pdpe_pa = 0; + + if (guest_pa_to_host_va(info, guest_pml4_pa, (addr_t*)&guest_pml) == -1) { + PrintError("Could not get virtual address of Guest PML4E64 (PA=%p)\n", + (void *)guest_pml4_pa); + return -1; + } + + switch (pml4e64_lookup(guest_pml, vaddr, &guest_pdpe_pa)) { + case PT_ENTRY_NOT_PRESENT: + *paddr = 0; + return -1; + case PT_ENTRY_PAGE: + { + pdpe64_t * guest_pdp = NULL; + addr_t guest_pde_pa = 0; + + if (guest_pa_to_host_va(info, guest_pdpe_pa, (addr_t *)&guest_pdp) == -1) { + PrintError("Could not get virtual address of Guest PDPE64 (PA=%p)\n", + (void *)guest_pdpe_pa); + return -1; + } -int pt32_lookup(pde32_t * pd, addr_t vaddr, addr_t * paddr) { - addr_t pde_entry; - pde32_entry_type_t pde_entry_type; + switch (pdpe64_lookup(guest_pdp, vaddr, &guest_pde_pa)) { + case PT_ENTRY_NOT_PRESENT: + *paddr = 0; + return -1; + case PT_ENTRY_LARGE_PAGE: + *paddr = 0; + PrintError("1 Gigabyte Pages not supported\n"); + return -1; + case PT_ENTRY_PAGE: + { + pde64_t * guest_pde = NULL; + addr_t guest_pte_pa = 0; + + if (guest_pa_to_host_va(info, guest_pde_pa, (addr_t *)&guest_pde) == -1) { + PrintError("Could not get virtual address of guest PDE64 (PA=%p)\n", + (void *)guest_pde_pa); + return -1; + } - if (pd == 0) { + switch (pde64_lookup(guest_pde, vaddr, &guest_pte_pa)) { + case PT_ENTRY_NOT_PRESENT: + *paddr = 0; + return -1; + case PT_ENTRY_LARGE_PAGE: + *paddr = guest_pte_pa; + return 0; + case PT_ENTRY_PAGE: + { + pte64_t * guest_pte = NULL; + + if (guest_pa_to_host_va(info, guest_pte_pa, (addr_t *)&guest_pte) == -1) { + PrintError("Could not get virtual address of guest PTE64 (PA=%p)\n", + (void *)guest_pte_pa); + return -1; + } + + if (pte64_lookup(guest_pte, vaddr, paddr) == PT_ENTRY_NOT_PRESENT) { + return -1; + } + + return 0; + } + } + } + } + } + default: return -1; } + return 0; +} - pde_entry_type = pde32_lookup(pd, vaddr, &pde_entry); - if (pde_entry_type == PDE32_ENTRY_PTE32) { - return pte32_lookup((pte32_t *)pde_entry, vaddr, paddr); - } else if (pde_entry_type == PDE32_ENTRY_LARGE_PAGE) { - *paddr = pde_entry; + +int translate_host_pt_32(addr_t host_cr3, addr_t vaddr, addr_t * paddr) { + pde32_t * host_pde = (pde32_t *)CR3_TO_PDE32_VA(host_cr3); + pte32_t * host_pte = 0; + + switch (pde32_lookup(host_pde, vaddr, (addr_t *)&host_pte)) { + case PT_ENTRY_NOT_PRESENT: + *paddr = 0; + return -1; + case PT_ENTRY_LARGE_PAGE: + *paddr = (addr_t)host_pte; return 0; + case PT_ENTRY_PAGE: + if (pte32_lookup(host_pte, vaddr, paddr) == PT_ENTRY_NOT_PRESENT) { + return -1; + } } + return 0; +} + + +int translate_host_pt_32pae(addr_t host_cr3, addr_t vaddr, addr_t * paddr) { + + + return -1; +} + + +int translate_host_pt_64(addr_t host_cr3, addr_t vaddr, addr_t * paddr) { + + return -1; } -/* We can't do a full lookup because we don't know what context the page tables are in... - * The entry addresses could be pointing to either guest physical memory or host physical memory - * Instead we just return the entry address, and a flag to show if it points to a pte or a large page... + + +/* + * PAGE TABLE LOOKUP FUNCTIONS + * + * + * The value of entry is a return type: + * Page not present: *entry = 0 + * Large Page: *entry = translated physical address (byte granularity) + * PTE entry: *entry is the address of the PTE Page */ -pde32_entry_type_t pde32_lookup(pde32_t * pd, addr_t addr, addr_t * entry) { + +/** + * + * 32 bit Page Table lookup functions + * + **/ + +pt_entry_type_t pde32_lookup(pde32_t * pd, addr_t addr, addr_t * entry) { pde32_t * pde_entry = &(pd[PDE32_INDEX(addr)]); if (!pde_entry->present) { *entry = 0; - return PDE32_ENTRY_NOT_PRESENT; - } else { + return PT_ENTRY_NOT_PRESENT; + } else if (pde_entry->large_page) { + pde32_4MB_t * large_pde = (pde32_4MB_t *)pde_entry; - if (pde_entry->large_page) { - pde32_4MB_t * large_pde = (pde32_4MB_t *)pde_entry; + *entry = BASE_TO_PAGE_ADDR_4MB(large_pde->page_base_addr); + *entry += PAGE_OFFSET_4MB(addr); - *entry = PDE32_4MB_T_ADDR(*large_pde); - *entry += PD32_4MB_PAGE_OFFSET(addr); - return PDE32_ENTRY_LARGE_PAGE; - } else { - *entry = PDE32_T_ADDR(*pde_entry); - return PDE32_ENTRY_PTE32; - } - } - return PDE32_ENTRY_NOT_PRESENT; + return PT_ENTRY_LARGE_PAGE; + } else { + *entry = BASE_TO_PAGE_ADDR(pde_entry->pt_base_addr); + return PT_ENTRY_PAGE; + } } /* Takes a virtual addr (addr) and returns the physical addr (entry) as defined in the page table */ -int pte32_lookup(pte32_t * pt, addr_t addr, addr_t * entry) { +pt_entry_type_t pte32_lookup(pte32_t * pt, addr_t addr, addr_t * entry) { pte32_t * pte_entry = &(pt[PTE32_INDEX(addr)]); if (!pte_entry->present) { *entry = 0; - PrintDebug("Lookup at non present page (index=%d)\n", PTE32_INDEX(addr)); + // PrintDebug("Lookup at non present page (index=%d)\n", PTE32_INDEX(addr)); + return PT_ENTRY_NOT_PRESENT; + } else { + *entry = BASE_TO_PAGE_ADDR(pte_entry->page_base_addr) + PAGE_OFFSET(addr); + return PT_ENTRY_PAGE; + } + +} + + + +/** + * + * 32 bit PAE Page Table lookup functions + * + **/ +pt_entry_type_t pdpe32pae_lookup(pdpe32pae_t * pdp, addr_t addr, addr_t * entry) { + pdpe32pae_t * pdpe_entry = &(pdp[PDPE32PAE_INDEX(addr)]); + + if (!pdpe_entry->present) { + *entry = 0; + return PT_ENTRY_NOT_PRESENT; + } else { + *entry = BASE_TO_PAGE_ADDR(pdpe_entry->pd_base_addr); + return PT_ENTRY_PAGE; + } +} + +pt_entry_type_t pde32pae_lookup(pde32pae_t * pd, addr_t addr, addr_t * entry) { + pde32pae_t * pde_entry = &(pd[PDE32PAE_INDEX(addr)]); + + if (!pde_entry->present) { + *entry = 0; + return PT_ENTRY_NOT_PRESENT; + } else if (pde_entry->large_page) { + pde32pae_2MB_t * large_pde = (pde32pae_2MB_t *)pde_entry; + + *entry = BASE_TO_PAGE_ADDR_2MB(large_pde->page_base_addr); + *entry += PAGE_OFFSET_2MB(addr); + + return PT_ENTRY_LARGE_PAGE; + } else { + *entry = BASE_TO_PAGE_ADDR(pde_entry->pt_base_addr); + return PT_ENTRY_PAGE; + } +} + +pt_entry_type_t pte32pae_lookup(pte32pae_t * pt, addr_t addr, addr_t * entry) { + pte32pae_t * pte_entry = &(pt[PTE32PAE_INDEX(addr)]); + + if (!pte_entry->present) { + *entry = 0; + return PT_ENTRY_NOT_PRESENT; + } else { + *entry = BASE_TO_PAGE_ADDR(pte_entry->page_base_addr) + PAGE_OFFSET(addr); + return PT_ENTRY_PAGE; + } +} + + + +/** + * + * 64 bit Page Table lookup functions + * + **/ +pt_entry_type_t pml4e64_lookup(pml4e64_t * pml, addr_t addr, addr_t * entry) { + pml4e64_t * pml_entry = &(pml[PML4E64_INDEX(addr)]); + + if (!pml_entry->present) { + *entry = 0; + return PT_ENTRY_NOT_PRESENT; + } else { + *entry = BASE_TO_PAGE_ADDR(pml_entry->pdp_base_addr); + return PT_ENTRY_PAGE; + } +} + +pt_entry_type_t pdpe64_lookup(pdpe64_t * pdp, addr_t addr, addr_t * entry) { + pdpe64_t * pdpe_entry = &(pdp[PDPE64_INDEX(addr)]); + + if (!pdpe_entry->present) { + *entry = 0; + return PT_ENTRY_NOT_PRESENT; + } else if (pdpe_entry->large_page) { + PrintError("1 Gigabyte pages not supported\n"); + V3_ASSERT(0); return -1; } else { - *entry = PTE32_T_ADDR(*pte_entry) + PT32_PAGE_OFFSET(addr); - return 0; + *entry = BASE_TO_PAGE_ADDR(pdpe_entry->pd_base_addr); + return PT_ENTRY_PAGE; } +} - return -1; +pt_entry_type_t pde64_lookup(pde64_t * pd, addr_t addr, addr_t * entry) { + pde64_t * pde_entry = &(pd[PDE64_INDEX(addr)]); + + if (!pde_entry->present) { + *entry = 0; + return PT_ENTRY_NOT_PRESENT; + } else if (pde_entry->large_page) { + pde64_2MB_t * large_pde = (pde64_2MB_t *)pde_entry; + + *entry = BASE_TO_PAGE_ADDR_2MB(large_pde->page_base_addr); + *entry += PAGE_OFFSET_2MB(addr); + + return PT_ENTRY_LARGE_PAGE; + } else { + *entry = BASE_TO_PAGE_ADDR(pde_entry->pt_base_addr); + return PT_ENTRY_PAGE; + } +} + +pt_entry_type_t pte64_lookup(pte64_t * pt, addr_t addr, addr_t * entry) { + pte64_t * pte_entry = &(pt[PTE64_INDEX(addr)]); + + if (!pte_entry->present) { + *entry = 0; + return PT_ENTRY_NOT_PRESENT; + } else { + *entry = BASE_TO_PAGE_ADDR(pte_entry->page_base_addr) + PAGE_OFFSET(addr); + return PT_ENTRY_PAGE; + } } + + + + + + + + + + + + + + pt_access_status_t can_access_pde32(pde32_t * pde, addr_t addr, pf_error_t access_type) { pde32_t * entry = &pde[PDE32_INDEX(addr)]; if (entry->present == 0) { - return PT_ENTRY_NOT_PRESENT; + return PT_ACCESS_NOT_PRESENT; } else if ((entry->writable == 0) && (access_type.write == 1)) { - return PT_WRITE_ERROR; + return PT_ACCESS_WRITE_ERROR; } else if ((entry->user_page == 0) && (access_type.user == 1)) { // Check CR0.WP? - return PT_USER_ERROR; + return PT_ACCESS_USER_ERROR; } return PT_ACCESS_OK; @@ -176,12 +485,12 @@ pt_access_status_t can_access_pte32(pte32_t * pte, addr_t addr, pf_error_t acces pte32_t * entry = &pte[PTE32_INDEX(addr)]; if (entry->present == 0) { - return PT_ENTRY_NOT_PRESENT; + return PT_ACCESS_NOT_PRESENT; } else if ((entry->writable == 0) && (access_type.write == 1)) { - return PT_WRITE_ERROR; + return PT_ACCESS_WRITE_ERROR; } else if ((entry->user_page == 0) && (access_type.user == 1)) { // Check CR0.WP? - return PT_USER_ERROR; + return PT_ACCESS_USER_ERROR; } return PT_ACCESS_OK; @@ -278,7 +587,7 @@ pde32_t * create_passthrough_pts_32(struct guest_info * guest_info) { pde[i].large_page = 0; pde[i].global_page = 0; pde[i].vmm_info = 0; - pde[i].pt_base_addr = PAGE_ALIGNED_ADDR((addr_t)V3_PAddr(pte)); + pde[i].pt_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pte)); } } @@ -385,7 +694,7 @@ pdpe32pae_t * create_passthrough_pts_32PAE(struct guest_info * guest_info) { pde[j].large_page = 0; pde[j].global_page = 0; pde[j].vmm_info = 0; - pde[j].pt_base_addr = PAGE_ALIGNED_ADDR((addr_t)V3_PAddr(pte)); + pde[j].pt_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pte)); pde[j].rsvd = 0; pde_present = 1; @@ -415,7 +724,7 @@ pdpe32pae_t * create_passthrough_pts_32PAE(struct guest_info * guest_info) { pdpe[i].avail = 0; pdpe[i].rsvd2 = 0; pdpe[i].vmm_info = 0; - pdpe[i].pd_base_addr = PAGE_ALIGNED_ADDR((addr_t)V3_PAddr(pde)); + pdpe[i].pd_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pde)); pdpe[i].rsvd3 = 0; } @@ -491,7 +800,7 @@ pml4e64_t * create_passthrough_pts_64(struct guest_info * info) { return NULL; } - pte[m].page_base_addr = PTE64_BASE_ADDR(host_addr); + pte[m].page_base_addr = PAGE_BASE_ADDR(host_addr); //PrintPTE64(current_page_addr, &(pte[m])); @@ -513,7 +822,7 @@ pml4e64_t * create_passthrough_pts_64(struct guest_info * info) { pde[k].write_through = 0; pde[k].cache_disable = 0; pde[k].accessed = 0; - pde[k].reserved = 0; + pde[k].avail = 0; pde[k].large_page = 0; //pde[k].global_page = 0; pde[k].vmm_info = 0; @@ -525,11 +834,11 @@ pml4e64_t * create_passthrough_pts_64(struct guest_info * info) { pde[k].write_through = 0; pde[k].cache_disable = 0; pde[k].accessed = 0; - pde[k].reserved = 0; + pde[k].avail = 0; pde[k].large_page = 0; //pde[k].global_page = 0; pde[k].vmm_info = 0; - pde[k].pt_base_addr = PAGE_ALIGNED_ADDR((addr_t)V3_PAddr(pte)); + pde[k].pt_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pte)); pde_present = 1; } @@ -544,7 +853,7 @@ pml4e64_t * create_passthrough_pts_64(struct guest_info * info) { pdpe[j].write_through = 0; pdpe[j].cache_disable = 0; pdpe[j].accessed = 0; - pdpe[j].reserved = 0; + pdpe[j].avail = 0; pdpe[j].large_page = 0; //pdpe[j].global_page = 0; pdpe[j].vmm_info = 0; @@ -556,11 +865,11 @@ pml4e64_t * create_passthrough_pts_64(struct guest_info * info) { pdpe[j].write_through = 0; pdpe[j].cache_disable = 0; pdpe[j].accessed = 0; - pdpe[j].reserved = 0; + pdpe[j].avail = 0; pdpe[j].large_page = 0; //pdpe[j].global_page = 0; pdpe[j].vmm_info = 0; - pdpe[j].pd_base_addr = PAGE_ALIGNED_ADDR((addr_t)V3_PAddr(pde)); + pdpe[j].pd_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pde)); pdpe_present = 1; @@ -595,7 +904,7 @@ pml4e64_t * create_passthrough_pts_64(struct guest_info * info) { //pml[i].large_page = 0; //pml[i].global_page = 0; pml[i].vmm_info = 0; - pml[i].pdp_base_addr = PAGE_ALIGNED_ADDR((addr_t)V3_PAddr(pdpe)); + pml[i].pdp_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pdpe)); } }