| 0,0 → 1,259 |
|---|
| /* |
| * Copyright (c) 2006 Martin Decky |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup ia32xen_mm |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #ifndef KERN_ia32xen_PAGE_H_ |
| #define KERN_ia32xen_PAGE_H_ |
| |
| #include <arch/mm/frame.h> |
| |
| #define PAGE_WIDTH FRAME_WIDTH |
| #define PAGE_SIZE FRAME_SIZE |
| |
| #define PAGE_COLOR_BITS 0 /* dummy */ |
| |
| #ifdef KERNEL |
| |
| #ifndef __ASM__ |
| # define KA2PA(x) (((uintptr_t) (x)) - 0x80000000) |
| # define PA2KA(x) (((uintptr_t) (x)) + 0x80000000) |
| #else |
| # define KA2PA(x) ((x) - 0x80000000) |
| # define PA2KA(x) ((x) + 0x80000000) |
| #endif |
| |
| /* |
| * Implementation of generic 4-level page table interface. |
| * IA-32 has 2-level page tables, so PTL1 and PTL2 are left out. |
| */ |
| |
| /* Number of entries in each level. */ |
| #define PTL0_ENTRIES_ARCH 1024 |
| #define PTL1_ENTRIES_ARCH 0 |
| #define PTL2_ENTRIES_ARCH 0 |
| #define PTL3_ENTRIES_ARCH 1024 |
| |
| /* Page table size for each level. */ |
| #define PTL0_SIZE_ARCH ONE_FRAME |
| #define PTL1_SIZE_ARCH 0 |
| #define PTL2_SIZE_ARCH 0 |
| #define PTL3_SIZE_ARCH ONE_FRAME |
| |
| /* Macros calculating indices into page tables in each level. */ |
| #define PTL0_INDEX_ARCH(vaddr) (((vaddr) >> 22) & 0x3ff) |
| #define PTL1_INDEX_ARCH(vaddr) 0 |
| #define PTL2_INDEX_ARCH(vaddr) 0 |
| #define PTL3_INDEX_ARCH(vaddr) (((vaddr) >> 12) & 0x3ff) |
| |
| /* Get PTE address accessors for each level. */ |
| #define GET_PTL1_ADDRESS_ARCH(ptl0, i) \ |
| ((pte_t *) MA2PA((((pte_t *) (ptl0))[(i)].frame_address) << 12)) |
| #define GET_PTL2_ADDRESS_ARCH(ptl1, i) \ |
| (ptl1) |
| #define GET_PTL3_ADDRESS_ARCH(ptl2, i) \ |
| (ptl2) |
| #define GET_FRAME_ADDRESS_ARCH(ptl3, i) \ |
| ((uintptr_t) MA2PA((((pte_t *) (ptl3))[(i)].frame_address) << 12)) |
| |
| /* Set PTE address accessors for each level. */ |
| #define SET_PTL0_ADDRESS_ARCH(ptl0) \ |
| { \ |
| mmuext_op_t mmu_ext; \ |
| \ |
| mmu_ext.cmd = MMUEXT_NEW_BASEPTR; \ |
| mmu_ext.mfn = ADDR2PFN(PA2MA(ptl0)); \ |
| ASSERT(xen_mmuext_op(&mmu_ext, 1, NULL, DOMID_SELF) == 0); \ |
| } |
| |
| #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) \ |
| { \ |
| mmuext_op_t mmu_ext; \ |
| \ |
| mmu_ext.cmd = MMUEXT_PIN_L1_TABLE; \ |
| mmu_ext.mfn = ADDR2PFN(PA2MA(a)); \ |
| ASSERT(xen_mmuext_op(&mmu_ext, 1, NULL, DOMID_SELF) == 0); \ |
| \ |
| mmu_update_t update; \ |
| \ |
| update.ptr = PA2MA(KA2PA(&((pte_t *) (ptl0))[(i)])); \ |
| update.val = PA2MA(a); \ |
| ASSERT(xen_mmu_update(&update, 1, NULL, DOMID_SELF) == 0); \ |
| } |
| |
| #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
| #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
| #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) \ |
| { \ |
| mmu_update_t update; \ |
| \ |
| update.ptr = PA2MA(KA2PA(&((pte_t *) (ptl3))[(i)])); \ |
| update.val = PA2MA(a); \ |
| ASSERT(xen_mmu_update(&update, 1, NULL, DOMID_SELF) == 0); \ |
| } |
| |
| /* Get PTE flags accessors for each level. */ |
| #define GET_PTL1_FLAGS_ARCH(ptl0, i) \ |
| get_pt_flags((pte_t *) (ptl0), (index_t) (i)) |
| #define GET_PTL2_FLAGS_ARCH(ptl1, i) \ |
| PAGE_PRESENT |
| #define GET_PTL3_FLAGS_ARCH(ptl2, i) \ |
| PAGE_PRESENT |
| #define GET_FRAME_FLAGS_ARCH(ptl3, i) \ |
| get_pt_flags((pte_t *) (ptl3), (index_t) (i)) |
| |
| /* Set PTE flags accessors for each level. */ |
| #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) \ |
| set_pt_flags((pte_t *) (ptl0), (index_t) (i), (x)) |
| #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
| #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
| #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) \ |
| set_pt_flags((pte_t *) (ptl3), (index_t) (i), (x)) |
| |
| /* Query macros for the last level. */ |
| #define PTE_VALID_ARCH(p) \ |
| (*((uint32_t *) (p)) != 0) |
| #define PTE_PRESENT_ARCH(p) \ |
| ((p)->present != 0) |
| #define PTE_GET_FRAME_ARCH(p) \ |
| ((p)->frame_address << FRAME_WIDTH) |
| #define PTE_WRITABLE_ARCH(p) \ |
| ((p)->writeable != 0) |
| #define PTE_EXECUTABLE_ARCH(p) \ |
| 1 |
| |
| #ifndef __ASM__ |
| |
| #include <mm/mm.h> |
| #include <arch/hypercall.h> |
| #include <arch/interrupt.h> |
| |
| /* Page fault error codes. */ |
| |
| /** When bit on this position is 0, the page fault was caused by a not-present |
| * page. |
| */ |
| #define PFERR_CODE_P (1 << 0) |
| |
| /** When bit on this position is 1, the page fault was caused by a write. */ |
| #define PFERR_CODE_RW (1 << 1) |
| |
| /** When bit on this position is 1, the page fault was caused in user mode. */ |
| #define PFERR_CODE_US (1 << 2) |
| |
| /** When bit on this position is 1, a reserved bit was set in page directory. */ |
| #define PFERR_CODE_RSVD (1 << 3) |
| |
| typedef struct { |
| uint64_t ptr; /**< Machine address of PTE */ |
| union { /**< New contents of PTE */ |
| uint64_t val; |
| pte_t pte; |
| }; |
| } mmu_update_t; |
| |
| typedef struct { |
| unsigned int cmd; |
| union { |
| unsigned long mfn; |
| unsigned long linear_addr; |
| }; |
| union { |
| unsigned int nr_ents; |
| void *vcpumask; |
| }; |
| } mmuext_op_t; |
| |
| static inline int xen_update_va_mapping(const void *va, const pte_t pte, |
| const unsigned int flags) |
| { |
| return hypercall4(XEN_UPDATE_VA_MAPPING, va, pte, 0, flags); |
| } |
| |
| static inline int xen_mmu_update(const mmu_update_t *req, |
| const unsigned int count, unsigned int *success_count, domid_t domid) |
| { |
| return hypercall4(XEN_MMU_UPDATE, req, count, success_count, domid); |
| } |
| |
| static inline int xen_mmuext_op(const mmuext_op_t *op, const unsigned int count, |
| unsigned int *success_count, domid_t domid) |
| { |
| return hypercall4(XEN_MMUEXT_OP, op, count, success_count, domid); |
| } |
| |
| static inline int get_pt_flags(pte_t *pt, index_t i) |
| { |
| pte_t *p = &pt[i]; |
| |
| return ((!p->page_cache_disable) << PAGE_CACHEABLE_SHIFT | |
| (!p->present) << PAGE_PRESENT_SHIFT | |
| p->uaccessible << PAGE_USER_SHIFT | |
| 1 << PAGE_READ_SHIFT | |
| p->writeable << PAGE_WRITE_SHIFT | |
| 1 << PAGE_EXEC_SHIFT | |
| p->global << PAGE_GLOBAL_SHIFT); |
| } |
| |
| static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
| { |
| pte_t p = pt[i]; |
| |
| p.page_cache_disable = !(flags & PAGE_CACHEABLE); |
| p.present = !(flags & PAGE_NOT_PRESENT); |
| p.uaccessible = (flags & PAGE_USER) != 0; |
| p.writeable = (flags & PAGE_WRITE) != 0; |
| p.global = (flags & PAGE_GLOBAL) != 0; |
| |
| /* |
| * Ensure that there is at least one bit set even if the present bit is cleared. |
| */ |
| p.soft_valid = true; |
| |
| mmu_update_t update; |
| |
| update.ptr = PA2MA(KA2PA(&(pt[i]))); |
| update.pte = p; |
| xen_mmu_update(&update, 1, NULL, DOMID_SELF); |
| } |
| |
| extern void page_arch_init(void); |
| extern void page_fault(int n, istate_t *istate); |
| |
| #endif /* __ASM__ */ |
| |
| #endif /* KERNEL */ |
| |
| #endif |
| |
| /** @} |
| */ |