diff options
-rw-r--r-- | arch/x86/include/asm/desc.h | 152 |
1 files changed, 76 insertions, 76 deletions
diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h index 617bd56b3070..7b439d9aea2a 100644 --- a/arch/x86/include/asm/desc.h +++ b/arch/x86/include/asm/desc.h | |||
@@ -4,30 +4,33 @@ | |||
4 | #include <asm/desc_defs.h> | 4 | #include <asm/desc_defs.h> |
5 | #include <asm/ldt.h> | 5 | #include <asm/ldt.h> |
6 | #include <asm/mmu.h> | 6 | #include <asm/mmu.h> |
7 | |||
7 | #include <linux/smp.h> | 8 | #include <linux/smp.h> |
8 | 9 | ||
9 | static inline void fill_ldt(struct desc_struct *desc, | 10 | static inline void fill_ldt(struct desc_struct *desc, const struct user_desc *info) |
10 | const struct user_desc *info) | 11 | { |
11 | { | 12 | desc->limit0 = info->limit & 0x0ffff; |
12 | desc->limit0 = info->limit & 0x0ffff; | 13 | |
13 | desc->base0 = info->base_addr & 0x0000ffff; | 14 | desc->base0 = (info->base_addr & 0x0000ffff); |
14 | 15 | desc->base1 = (info->base_addr & 0x00ff0000) >> 16; | |
15 | desc->base1 = (info->base_addr & 0x00ff0000) >> 16; | 16 | |
16 | desc->type = (info->read_exec_only ^ 1) << 1; | 17 | desc->type = (info->read_exec_only ^ 1) << 1; |
17 | desc->type |= info->contents << 2; | 18 | desc->type |= info->contents << 2; |
18 | desc->s = 1; | 19 | |
19 | desc->dpl = 0x3; | 20 | desc->s = 1; |
20 | desc->p = info->seg_not_present ^ 1; | 21 | desc->dpl = 0x3; |
21 | desc->limit = (info->limit & 0xf0000) >> 16; | 22 | desc->p = info->seg_not_present ^ 1; |
22 | desc->avl = info->useable; | 23 | desc->limit = (info->limit & 0xf0000) >> 16; |
23 | desc->d = info->seg_32bit; | 24 | desc->avl = info->useable; |
24 | desc->g = info->limit_in_pages; | 25 | desc->d = info->seg_32bit; |
25 | desc->base2 = (info->base_addr & 0xff000000) >> 24; | 26 | desc->g = info->limit_in_pages; |
27 | |||
28 | desc->base2 = (info->base_addr & 0xff000000) >> 24; | ||
26 | /* | 29 | /* |
27 | * Don't allow setting of the lm bit. It is useless anyway | 30 | * Don't allow setting of the lm bit. It is useless anyway |
28 | * because 64bit system calls require __USER_CS: | 31 | * because 64bit system calls require __USER_CS: |
29 | */ | 32 | */ |
30 | desc->l = 0; | 33 | desc->l = 0; |
31 | } | 34 | } |
32 | 35 | ||
33 | extern struct desc_ptr idt_descr; | 36 | extern struct desc_ptr idt_descr; |
@@ -36,6 +39,7 @@ extern gate_desc idt_table[]; | |||
36 | struct gdt_page { | 39 | struct gdt_page { |
37 | struct desc_struct gdt[GDT_ENTRIES]; | 40 | struct desc_struct gdt[GDT_ENTRIES]; |
38 | } __attribute__((aligned(PAGE_SIZE))); | 41 | } __attribute__((aligned(PAGE_SIZE))); |
42 | |||
39 | DECLARE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page); | 43 | DECLARE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page); |
40 | 44 | ||
41 | static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu) | 45 | static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu) |
@@ -48,16 +52,16 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu) | |||
48 | static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func, | 52 | static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func, |
49 | unsigned dpl, unsigned ist, unsigned seg) | 53 | unsigned dpl, unsigned ist, unsigned seg) |
50 | { | 54 | { |
51 | gate->offset_low = PTR_LOW(func); | 55 | gate->offset_low = PTR_LOW(func); |
52 | gate->segment = __KERNEL_CS; | 56 | gate->segment = __KERNEL_CS; |
53 | gate->ist = ist; | 57 | gate->ist = ist; |
54 | gate->p = 1; | 58 | gate->p = 1; |
55 | gate->dpl = dpl; | 59 | gate->dpl = dpl; |
56 | gate->zero0 = 0; | 60 | gate->zero0 = 0; |
57 | gate->zero1 = 0; | 61 | gate->zero1 = 0; |
58 | gate->type = type; | 62 | gate->type = type; |
59 | gate->offset_middle = PTR_MIDDLE(func); | 63 | gate->offset_middle = PTR_MIDDLE(func); |
60 | gate->offset_high = PTR_HIGH(func); | 64 | gate->offset_high = PTR_HIGH(func); |
61 | } | 65 | } |
62 | 66 | ||
63 | #else | 67 | #else |
@@ -66,8 +70,7 @@ static inline void pack_gate(gate_desc *gate, unsigned char type, | |||
66 | unsigned short seg) | 70 | unsigned short seg) |
67 | { | 71 | { |
68 | gate->a = (seg << 16) | (base & 0xffff); | 72 | gate->a = (seg << 16) | (base & 0xffff); |
69 | gate->b = (base & 0xffff0000) | | 73 | gate->b = (base & 0xffff0000) | (((0x80 | type | (dpl << 5)) & 0xff) << 8); |
70 | (((0x80 | type | (dpl << 5)) & 0xff) << 8); | ||
71 | } | 74 | } |
72 | 75 | ||
73 | #endif | 76 | #endif |
@@ -75,31 +78,29 @@ static inline void pack_gate(gate_desc *gate, unsigned char type, | |||
75 | static inline int desc_empty(const void *ptr) | 78 | static inline int desc_empty(const void *ptr) |
76 | { | 79 | { |
77 | const u32 *desc = ptr; | 80 | const u32 *desc = ptr; |
81 | |||
78 | return !(desc[0] | desc[1]); | 82 | return !(desc[0] | desc[1]); |
79 | } | 83 | } |
80 | 84 | ||
81 | #ifdef CONFIG_PARAVIRT | 85 | #ifdef CONFIG_PARAVIRT |
82 | #include <asm/paravirt.h> | 86 | #include <asm/paravirt.h> |
83 | #else | 87 | #else |
84 | #define load_TR_desc() native_load_tr_desc() | 88 | #define load_TR_desc() native_load_tr_desc() |
85 | #define load_gdt(dtr) native_load_gdt(dtr) | 89 | #define load_gdt(dtr) native_load_gdt(dtr) |
86 | #define load_idt(dtr) native_load_idt(dtr) | 90 | #define load_idt(dtr) native_load_idt(dtr) |
87 | #define load_tr(tr) asm volatile("ltr %0"::"m" (tr)) | 91 | #define load_tr(tr) asm volatile("ltr %0"::"m" (tr)) |
88 | #define load_ldt(ldt) asm volatile("lldt %0"::"m" (ldt)) | 92 | #define load_ldt(ldt) asm volatile("lldt %0"::"m" (ldt)) |
89 | 93 | ||
90 | #define store_gdt(dtr) native_store_gdt(dtr) | 94 | #define store_gdt(dtr) native_store_gdt(dtr) |
91 | #define store_idt(dtr) native_store_idt(dtr) | 95 | #define store_idt(dtr) native_store_idt(dtr) |
92 | #define store_tr(tr) (tr = native_store_tr()) | 96 | #define store_tr(tr) (tr = native_store_tr()) |
93 | 97 | ||
94 | #define load_TLS(t, cpu) native_load_tls(t, cpu) | 98 | #define load_TLS(t, cpu) native_load_tls(t, cpu) |
95 | #define set_ldt native_set_ldt | 99 | #define set_ldt native_set_ldt |
96 | 100 | ||
97 | #define write_ldt_entry(dt, entry, desc) \ | 101 | #define write_ldt_entry(dt, entry, desc) native_write_ldt_entry(dt, entry, desc) |
98 | native_write_ldt_entry(dt, entry, desc) | 102 | #define write_gdt_entry(dt, entry, desc, type) native_write_gdt_entry(dt, entry, desc, type) |
99 | #define write_gdt_entry(dt, entry, desc, type) \ | 103 | #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g) |
100 | native_write_gdt_entry(dt, entry, desc, type) | ||
101 | #define write_idt_entry(dt, entry, g) \ | ||
102 | native_write_idt_entry(dt, entry, g) | ||
103 | 104 | ||
104 | static inline void paravirt_alloc_ldt(struct desc_struct *ldt, unsigned entries) | 105 | static inline void paravirt_alloc_ldt(struct desc_struct *ldt, unsigned entries) |
105 | { | 106 | { |
@@ -112,33 +113,27 @@ static inline void paravirt_free_ldt(struct desc_struct *ldt, unsigned entries) | |||
112 | 113 | ||
113 | #define store_ldt(ldt) asm("sldt %0" : "=m"(ldt)) | 114 | #define store_ldt(ldt) asm("sldt %0" : "=m"(ldt)) |
114 | 115 | ||
115 | static inline void native_write_idt_entry(gate_desc *idt, int entry, | 116 | static inline void native_write_idt_entry(gate_desc *idt, int entry, const gate_desc *gate) |
116 | const gate_desc *gate) | ||
117 | { | 117 | { |
118 | memcpy(&idt[entry], gate, sizeof(*gate)); | 118 | memcpy(&idt[entry], gate, sizeof(*gate)); |
119 | } | 119 | } |
120 | 120 | ||
121 | static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry, | 121 | static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry, const void *desc) |
122 | const void *desc) | ||
123 | { | 122 | { |
124 | memcpy(&ldt[entry], desc, 8); | 123 | memcpy(&ldt[entry], desc, 8); |
125 | } | 124 | } |
126 | 125 | ||
127 | static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry, | 126 | static inline void |
128 | const void *desc, int type) | 127 | native_write_gdt_entry(struct desc_struct *gdt, int entry, const void *desc, int type) |
129 | { | 128 | { |
130 | unsigned int size; | 129 | unsigned int size; |
130 | |||
131 | switch (type) { | 131 | switch (type) { |
132 | case DESC_TSS: | 132 | case DESC_TSS: size = sizeof(tss_desc); break; |
133 | size = sizeof(tss_desc); | 133 | case DESC_LDT: size = sizeof(ldt_desc); break; |
134 | break; | 134 | default: size = sizeof(*gdt); break; |
135 | case DESC_LDT: | ||
136 | size = sizeof(ldt_desc); | ||
137 | break; | ||
138 | default: | ||
139 | size = sizeof(struct desc_struct); | ||
140 | break; | ||
141 | } | 135 | } |
136 | |||
142 | memcpy(&gdt[entry], desc, size); | 137 | memcpy(&gdt[entry], desc, size); |
143 | } | 138 | } |
144 | 139 | ||
@@ -154,20 +149,21 @@ static inline void pack_descriptor(struct desc_struct *desc, unsigned long base, | |||
154 | } | 149 | } |
155 | 150 | ||
156 | 151 | ||
157 | static inline void set_tssldt_descriptor(void *d, unsigned long addr, | 152 | static inline void set_tssldt_descriptor(void *d, unsigned long addr, unsigned type, unsigned size) |
158 | unsigned type, unsigned size) | ||
159 | { | 153 | { |
160 | #ifdef CONFIG_X86_64 | 154 | #ifdef CONFIG_X86_64 |
161 | struct ldttss_desc64 *desc = d; | 155 | struct ldttss_desc64 *desc = d; |
156 | |||
162 | memset(desc, 0, sizeof(*desc)); | 157 | memset(desc, 0, sizeof(*desc)); |
163 | desc->limit0 = size & 0xFFFF; | 158 | |
164 | desc->base0 = PTR_LOW(addr); | 159 | desc->limit0 = size & 0xFFFF; |
165 | desc->base1 = PTR_MIDDLE(addr) & 0xFF; | 160 | desc->base0 = PTR_LOW(addr); |
166 | desc->type = type; | 161 | desc->base1 = PTR_MIDDLE(addr) & 0xFF; |
167 | desc->p = 1; | 162 | desc->type = type; |
168 | desc->limit1 = (size >> 16) & 0xF; | 163 | desc->p = 1; |
169 | desc->base2 = (PTR_MIDDLE(addr) >> 8) & 0xFF; | 164 | desc->limit1 = (size >> 16) & 0xF; |
170 | desc->base3 = PTR_HIGH(addr); | 165 | desc->base2 = (PTR_MIDDLE(addr) >> 8) & 0xFF; |
166 | desc->base3 = PTR_HIGH(addr); | ||
171 | #else | 167 | #else |
172 | pack_descriptor((struct desc_struct *)d, addr, size, 0x80 | type, 0); | 168 | pack_descriptor((struct desc_struct *)d, addr, size, 0x80 | type, 0); |
173 | #endif | 169 | #endif |
@@ -237,14 +233,16 @@ static inline void native_store_idt(struct desc_ptr *dtr) | |||
237 | static inline unsigned long native_store_tr(void) | 233 | static inline unsigned long native_store_tr(void) |
238 | { | 234 | { |
239 | unsigned long tr; | 235 | unsigned long tr; |
236 | |||
240 | asm volatile("str %0":"=r" (tr)); | 237 | asm volatile("str %0":"=r" (tr)); |
238 | |||
241 | return tr; | 239 | return tr; |
242 | } | 240 | } |
243 | 241 | ||
244 | static inline void native_load_tls(struct thread_struct *t, unsigned int cpu) | 242 | static inline void native_load_tls(struct thread_struct *t, unsigned int cpu) |
245 | { | 243 | { |
246 | unsigned int i; | ||
247 | struct desc_struct *gdt = get_cpu_gdt_table(cpu); | 244 | struct desc_struct *gdt = get_cpu_gdt_table(cpu); |
245 | unsigned int i; | ||
248 | 246 | ||
249 | for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++) | 247 | for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++) |
250 | gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i]; | 248 | gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i]; |
@@ -313,6 +311,7 @@ static inline void _set_gate(int gate, unsigned type, void *addr, | |||
313 | unsigned dpl, unsigned ist, unsigned seg) | 311 | unsigned dpl, unsigned ist, unsigned seg) |
314 | { | 312 | { |
315 | gate_desc s; | 313 | gate_desc s; |
314 | |||
316 | pack_gate(&s, type, (unsigned long)addr, dpl, ist, seg); | 315 | pack_gate(&s, type, (unsigned long)addr, dpl, ist, seg); |
317 | /* | 316 | /* |
318 | * does not need to be atomic because it is only done once at | 317 | * does not need to be atomic because it is only done once at |
@@ -343,8 +342,9 @@ static inline void alloc_system_vector(int vector) | |||
343 | set_bit(vector, used_vectors); | 342 | set_bit(vector, used_vectors); |
344 | if (first_system_vector > vector) | 343 | if (first_system_vector > vector) |
345 | first_system_vector = vector; | 344 | first_system_vector = vector; |
346 | } else | 345 | } else { |
347 | BUG(); | 346 | BUG(); |
347 | } | ||
348 | } | 348 | } |
349 | 349 | ||
350 | static inline void alloc_intr_gate(unsigned int n, void *addr) | 350 | static inline void alloc_intr_gate(unsigned int n, void *addr) |