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1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Martin Decky |
2 | * Copyright (C) 2006 Martin Decky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup ia32xen_mm |
29 | /** @addtogroup ia32xen_mm |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #ifndef KERN_ia32xen_PAGE_H_ |
35 | #ifndef KERN_ia32xen_PAGE_H_ |
36 | #define KERN_ia32xen_PAGE_H_ |
36 | #define KERN_ia32xen_PAGE_H_ |
37 | 37 | ||
38 | #include <arch/mm/frame.h> |
38 | #include <arch/mm/frame.h> |
39 | 39 | ||
40 | #define PAGE_WIDTH FRAME_WIDTH |
40 | #define PAGE_WIDTH FRAME_WIDTH |
41 | #define PAGE_SIZE FRAME_SIZE |
41 | #define PAGE_SIZE FRAME_SIZE |
42 | 42 | ||
43 | #define PAGE_COLOR_BITS 0 /* dummy */ |
43 | #define PAGE_COLOR_BITS 0 /* dummy */ |
44 | 44 | ||
45 | #ifdef KERNEL |
45 | #ifdef KERNEL |
46 | 46 | ||
47 | #ifndef __ASM__ |
47 | #ifndef __ASM__ |
48 | # define KA2PA(x) (((uintptr_t) (x)) - 0x80000000) |
48 | # define KA2PA(x) (((uintptr_t) (x)) - 0x80000000) |
49 | # define PA2KA(x) (((uintptr_t) (x)) + 0x80000000) |
49 | # define PA2KA(x) (((uintptr_t) (x)) + 0x80000000) |
50 | #else |
50 | #else |
51 | # define KA2PA(x) ((x) - 0x80000000) |
51 | # define KA2PA(x) ((x) - 0x80000000) |
52 | # define PA2KA(x) ((x) + 0x80000000) |
52 | # define PA2KA(x) ((x) + 0x80000000) |
53 | #endif |
53 | #endif |
54 | 54 | ||
55 | /* |
55 | /* |
56 | * Implementation of generic 4-level page table interface. |
56 | * Implementation of generic 4-level page table interface. |
57 | * IA-32 has 2-level page tables, so PTL1 and PTL2 are left out. |
57 | * IA-32 has 2-level page tables, so PTL1 and PTL2 are left out. |
58 | */ |
58 | */ |
59 | #define PTL0_ENTRIES_ARCH 1024 |
59 | #define PTL0_ENTRIES_ARCH 1024 |
60 | #define PTL1_ENTRIES_ARCH 0 |
60 | #define PTL1_ENTRIES_ARCH 0 |
61 | #define PTL2_ENTRIES_ARCH 0 |
61 | #define PTL2_ENTRIES_ARCH 0 |
62 | #define PTL3_ENTRIES_ARCH 1024 |
62 | #define PTL3_ENTRIES_ARCH 1024 |
63 | 63 | ||
64 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr) >> 22) & 0x3ff) |
64 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr) >> 22) & 0x3ff) |
65 | #define PTL1_INDEX_ARCH(vaddr) 0 |
65 | #define PTL1_INDEX_ARCH(vaddr) 0 |
66 | #define PTL2_INDEX_ARCH(vaddr) 0 |
66 | #define PTL2_INDEX_ARCH(vaddr) 0 |
67 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr) >> 12) & 0x3ff) |
67 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr) >> 12) & 0x3ff) |
68 | 68 | ||
69 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *) MA2PA((((pte_t *) (ptl0))[(i)].frame_address) << 12)) |
69 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *) MA2PA((((pte_t *) (ptl0))[(i)].frame_address) << 12)) |
70 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
70 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
71 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
71 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
72 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((uintptr_t) MA2PA((((pte_t *) (ptl3))[(i)].frame_address) << 12)) |
72 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((uintptr_t) MA2PA((((pte_t *) (ptl3))[(i)].frame_address) << 12)) |
73 | 73 | ||
74 | #define SET_PTL0_ADDRESS_ARCH(ptl0) { \ |
74 | #define SET_PTL0_ADDRESS_ARCH(ptl0) { \ |
75 | mmuext_op_t mmu_ext; \ |
75 | mmuext_op_t mmu_ext; \ |
76 | \ |
76 | \ |
77 | mmu_ext.cmd = MMUEXT_NEW_BASEPTR; \ |
77 | mmu_ext.cmd = MMUEXT_NEW_BASEPTR; \ |
78 | mmu_ext.mfn = ADDR2PFN(PA2MA(ptl0)); \ |
78 | mmu_ext.mfn = ADDR2PFN(PA2MA(ptl0)); \ |
79 | xen_mmuext_op(&mmu_ext, 1, NULL, DOMID_SELF); \ |
79 | ASSERT(xen_mmuext_op(&mmu_ext, 1, NULL, DOMID_SELF) == 0); \ |
80 | } |
80 | } |
81 | 81 | ||
82 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) { \ |
82 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) { \ |
- | 83 | mmuext_op_t mmu_ext; \ |
|
- | 84 | \ |
|
- | 85 | mmu_ext.cmd = MMUEXT_PIN_L1_TABLE; \ |
|
- | 86 | mmu_ext.mfn = ADDR2PFN(PA2MA(a)); \ |
|
- | 87 | ASSERT(xen_mmuext_op(&mmu_ext, 1, NULL, DOMID_SELF) == 0); \ |
|
- | 88 | \ |
|
83 | mmu_update_t update; \ |
89 | mmu_update_t update; \ |
84 | \ |
90 | \ |
85 | update.ptr = PA2MA(KA2PA(&((pte_t *) (ptl0))[(i)])); \ |
91 | update.ptr = PA2MA(KA2PA(&((pte_t *) (ptl0))[(i)])); \ |
86 | update.val = PA2MA(a) | 0x0003; \ |
92 | update.val = PA2MA(a); \ |
87 | xen_mmu_update(&update, 1, NULL, DOMID_SELF); \ |
93 | ASSERT(xen_mmu_update(&update, 1, NULL, DOMID_SELF) == 0); \ |
88 | } |
94 | } |
- | 95 | ||
89 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
96 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
90 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
97 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
91 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *) (ptl3))[(i)].frame_address = PA2MA(a) >> 12) |
98 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) { \ |
- | 99 | mmu_update_t update; \ |
|
- | 100 | \ |
|
- | 101 | update.ptr = PA2MA(KA2PA(&((pte_t *) (ptl3))[(i)])); \ |
|
- | 102 | update.val = PA2MA(a); \ |
|
- | 103 | ASSERT(xen_mmu_update(&update, 1, NULL, DOMID_SELF) == 0); \ |
|
- | 104 | } |
|
92 | 105 | ||
93 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *) (ptl0), (index_t)(i)) |
106 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *) (ptl0), (index_t)(i)) |
94 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT |
107 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT |
95 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT |
108 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT |
96 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *) (ptl3), (index_t)(i)) |
109 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *) (ptl3), (index_t)(i)) |
97 | 110 | ||
98 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *) (ptl0), (index_t)(i), (x)) |
111 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *) (ptl0), (index_t)(i), (x)) |
99 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
112 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
100 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
113 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
101 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *) (ptl3), (index_t)(i), (x)) |
114 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *) (ptl3), (index_t)(i), (x)) |
102 | 115 | ||
103 | #define PTE_VALID_ARCH(p) (*((uint32_t *) (p)) != 0) |
116 | #define PTE_VALID_ARCH(p) (*((uint32_t *) (p)) != 0) |
104 | #define PTE_PRESENT_ARCH(p) ((p)->present != 0) |
117 | #define PTE_PRESENT_ARCH(p) ((p)->present != 0) |
105 | #define PTE_GET_FRAME_ARCH(p) ((p)->frame_address << FRAME_WIDTH) |
118 | #define PTE_GET_FRAME_ARCH(p) ((p)->frame_address << FRAME_WIDTH) |
106 | #define PTE_WRITABLE_ARCH(p) ((p)->writeable != 0) |
119 | #define PTE_WRITABLE_ARCH(p) ((p)->writeable != 0) |
107 | #define PTE_EXECUTABLE_ARCH(p) 1 |
120 | #define PTE_EXECUTABLE_ARCH(p) 1 |
108 | 121 | ||
109 | #ifndef __ASM__ |
122 | #ifndef __ASM__ |
110 | 123 | ||
111 | #include <mm/page.h> |
124 | #include <mm/page.h> |
112 | #include <arch/types.h> |
125 | #include <arch/types.h> |
113 | #include <arch/mm/frame.h> |
126 | #include <arch/mm/frame.h> |
114 | #include <typedefs.h> |
127 | #include <typedefs.h> |
115 | #include <arch/hypercall.h> |
128 | #include <arch/hypercall.h> |
116 | 129 | ||
117 | /* Page fault error codes. */ |
130 | /* Page fault error codes. */ |
118 | 131 | ||
119 | /** When bit on this position is 0, the page fault was caused by a not-present page. */ |
132 | /** When bit on this position is 0, the page fault was caused by a not-present page. */ |
120 | #define PFERR_CODE_P (1 << 0) |
133 | #define PFERR_CODE_P (1 << 0) |
121 | 134 | ||
122 | /** When bit on this position is 1, the page fault was caused by a write. */ |
135 | /** When bit on this position is 1, the page fault was caused by a write. */ |
123 | #define PFERR_CODE_RW (1 << 1) |
136 | #define PFERR_CODE_RW (1 << 1) |
124 | 137 | ||
125 | /** When bit on this position is 1, the page fault was caused in user mode. */ |
138 | /** When bit on this position is 1, the page fault was caused in user mode. */ |
126 | #define PFERR_CODE_US (1 << 2) |
139 | #define PFERR_CODE_US (1 << 2) |
127 | 140 | ||
128 | /** When bit on this position is 1, a reserved bit was set in page directory. */ |
141 | /** When bit on this position is 1, a reserved bit was set in page directory. */ |
129 | #define PFERR_CODE_RSVD (1 << 3) |
142 | #define PFERR_CODE_RSVD (1 << 3) |
130 | 143 | ||
131 | /** Page Table Entry. */ |
144 | /** Page Table Entry. */ |
132 | struct page_specifier { |
145 | struct page_specifier { |
133 | unsigned present : 1; |
146 | unsigned present : 1; |
134 | unsigned writeable : 1; |
147 | unsigned writeable : 1; |
135 | unsigned uaccessible : 1; |
148 | unsigned uaccessible : 1; |
136 | unsigned page_write_through : 1; |
149 | unsigned page_write_through : 1; |
137 | unsigned page_cache_disable : 1; |
150 | unsigned page_cache_disable : 1; |
138 | unsigned accessed : 1; |
151 | unsigned accessed : 1; |
139 | unsigned dirty : 1; |
152 | unsigned dirty : 1; |
140 | unsigned pat : 1; |
153 | unsigned pat : 1; |
141 | unsigned global : 1; |
154 | unsigned global : 1; |
142 | unsigned soft_valid : 1; /**< Valid content even if the present bit is not set. */ |
155 | unsigned soft_valid : 1; /**< Valid content even if the present bit is not set. */ |
143 | unsigned avl : 2; |
156 | unsigned avl : 2; |
144 | unsigned frame_address : 20; |
157 | unsigned frame_address : 20; |
145 | } __attribute__ ((packed)); |
158 | } __attribute__ ((packed)); |
146 | 159 | ||
147 | typedef struct { |
160 | typedef struct { |
148 | uint64_t ptr; /**< Machine address of PTE */ |
161 | uint64_t ptr; /**< Machine address of PTE */ |
149 | union { /**< New contents of PTE */ |
162 | union { /**< New contents of PTE */ |
150 | uint64_t val; |
163 | uint64_t val; |
151 | pte_t pte; |
164 | pte_t pte; |
152 | }; |
165 | }; |
153 | } mmu_update_t; |
166 | } mmu_update_t; |
154 | 167 | ||
155 | typedef struct { |
168 | typedef struct { |
156 | unsigned int cmd; |
169 | unsigned int cmd; |
157 | union { |
170 | union { |
158 | unsigned long mfn; |
171 | unsigned long mfn; |
159 | unsigned long linear_addr; |
172 | unsigned long linear_addr; |
160 | }; |
173 | }; |
161 | union { |
174 | union { |
162 | unsigned int nr_ents; |
175 | unsigned int nr_ents; |
163 | void *vcpumask; |
176 | void *vcpumask; |
164 | }; |
177 | }; |
165 | } mmuext_op_t; |
178 | } mmuext_op_t; |
166 | 179 | ||
167 | static inline int xen_update_va_mapping(const void *va, const pte_t pte, const unsigned int flags) |
180 | static inline int xen_update_va_mapping(const void *va, const pte_t pte, const unsigned int flags) |
168 | { |
181 | { |
169 | return hypercall4(XEN_UPDATE_VA_MAPPING, va, pte, 0, flags); |
182 | return hypercall4(XEN_UPDATE_VA_MAPPING, va, pte, 0, flags); |
170 | } |
183 | } |
171 | 184 | ||
172 | static inline int xen_mmu_update(const mmu_update_t *req, const unsigned int count, unsigned int *success_count, domid_t domid) |
185 | static inline int xen_mmu_update(const mmu_update_t *req, const unsigned int count, unsigned int *success_count, domid_t domid) |
173 | { |
186 | { |
174 | return hypercall4(XEN_MMU_UPDATE, req, count, success_count, domid); |
187 | return hypercall4(XEN_MMU_UPDATE, req, count, success_count, domid); |
175 | } |
188 | } |
176 | 189 | ||
177 | static inline int xen_mmuext_op(const mmuext_op_t *op, const unsigned int count, unsigned int *success_count, domid_t domid) |
190 | static inline int xen_mmuext_op(const mmuext_op_t *op, const unsigned int count, unsigned int *success_count, domid_t domid) |
178 | { |
191 | { |
179 | return hypercall4(XEN_MMUEXT_OP, op, count, success_count, domid); |
192 | return hypercall4(XEN_MMUEXT_OP, op, count, success_count, domid); |
180 | } |
193 | } |
181 | 194 | ||
182 | static inline int get_pt_flags(pte_t *pt, index_t i) |
195 | static inline int get_pt_flags(pte_t *pt, index_t i) |
183 | { |
196 | { |
184 | pte_t *p = &pt[i]; |
197 | pte_t *p = &pt[i]; |
185 | 198 | ||
186 | return ( |
199 | return ( |
187 | (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT | |
200 | (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT | |
188 | (!p->present)<<PAGE_PRESENT_SHIFT | |
201 | (!p->present)<<PAGE_PRESENT_SHIFT | |
189 | p->uaccessible<<PAGE_USER_SHIFT | |
202 | p->uaccessible<<PAGE_USER_SHIFT | |
190 | 1<<PAGE_READ_SHIFT | |
203 | 1<<PAGE_READ_SHIFT | |
191 | p->writeable<<PAGE_WRITE_SHIFT | |
204 | p->writeable<<PAGE_WRITE_SHIFT | |
192 | 1<<PAGE_EXEC_SHIFT | |
205 | 1<<PAGE_EXEC_SHIFT | |
193 | p->global<<PAGE_GLOBAL_SHIFT |
206 | p->global<<PAGE_GLOBAL_SHIFT |
194 | ); |
207 | ); |
195 | } |
208 | } |
196 | 209 | ||
197 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
210 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
198 | { |
211 | { |
199 | pte_t *p = &pt[i]; |
212 | pte_t p = pt[i]; |
200 | 213 | ||
201 | p->page_cache_disable = !(flags & PAGE_CACHEABLE); |
214 | p.page_cache_disable = !(flags & PAGE_CACHEABLE); |
202 | p->present = !(flags & PAGE_NOT_PRESENT); |
215 | p.present = !(flags & PAGE_NOT_PRESENT); |
203 | p->uaccessible = (flags & PAGE_USER) != 0; |
216 | p.uaccessible = (flags & PAGE_USER) != 0; |
204 | p->writeable = (flags & PAGE_WRITE) != 0; |
217 | p.writeable = (flags & PAGE_WRITE) != 0; |
205 | p->global = (flags & PAGE_GLOBAL) != 0; |
218 | p.global = (flags & PAGE_GLOBAL) != 0; |
206 | 219 | ||
207 | /* |
220 | /* |
208 | * Ensure that there is at least one bit set even if the present bit is cleared. |
221 | * Ensure that there is at least one bit set even if the present bit is cleared. |
209 | */ |
222 | */ |
210 | p->soft_valid = true; |
223 | p.soft_valid = true; |
- | 224 | ||
- | 225 | mmu_update_t update; |
|
- | 226 | ||
- | 227 | update.ptr = PA2MA(KA2PA(&(pt[i]))); |
|
- | 228 | update.pte = p; |
|
- | 229 | xen_mmu_update(&update, 1, NULL, DOMID_SELF); |
|
211 | } |
230 | } |
212 | 231 | ||
213 | extern void page_arch_init(void); |
232 | extern void page_arch_init(void); |
214 | extern void page_fault(int n, istate_t *istate); |
233 | extern void page_fault(int n, istate_t *istate); |
215 | 234 | ||
216 | #endif /* __ASM__ */ |
235 | #endif /* __ASM__ */ |
217 | 236 | ||
218 | #endif /* KERNEL */ |
237 | #endif /* KERNEL */ |
219 | 238 | ||
220 | #endif |
239 | #endif |
221 | 240 | ||
222 | /** @} |
241 | /** @} |
223 | */ |
242 | */ |
224 | 243 |