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-rw-r--r--arch/i386/kernel/cpu/mtrr/if.c119
-rw-r--r--arch/x86_64/ia32/ia32_ioctl.c96
-rw-r--r--include/asm-x86_64/mtrr.h33
3 files changed, 107 insertions, 141 deletions
diff --git a/arch/i386/kernel/cpu/mtrr/if.c b/arch/i386/kernel/cpu/mtrr/if.c
index 1923e0aed26a..cf39e205d33c 100644
--- a/arch/i386/kernel/cpu/mtrr/if.c
+++ b/arch/i386/kernel/cpu/mtrr/if.c
@@ -149,60 +149,89 @@ mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos)
149 return -EINVAL; 149 return -EINVAL;
150} 150}
151 151
152static int 152static long
153mtrr_ioctl(struct inode *inode, struct file *file, 153mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg)
154 unsigned int cmd, unsigned long __arg)
155{ 154{
156 int err; 155 int err = 0;
157 mtrr_type type; 156 mtrr_type type;
158 struct mtrr_sentry sentry; 157 struct mtrr_sentry sentry;
159 struct mtrr_gentry gentry; 158 struct mtrr_gentry gentry;
160 void __user *arg = (void __user *) __arg; 159 void __user *arg = (void __user *) __arg;
161 160
162 switch (cmd) { 161 switch (cmd) {
162 case MTRRIOC_ADD_ENTRY:
163 case MTRRIOC_SET_ENTRY:
164 case MTRRIOC_DEL_ENTRY:
165 case MTRRIOC_KILL_ENTRY:
166 case MTRRIOC_ADD_PAGE_ENTRY:
167 case MTRRIOC_SET_PAGE_ENTRY:
168 case MTRRIOC_DEL_PAGE_ENTRY:
169 case MTRRIOC_KILL_PAGE_ENTRY:
170 if (copy_from_user(&sentry, arg, sizeof sentry))
171 return -EFAULT;
172 break;
173 case MTRRIOC_GET_ENTRY:
174 case MTRRIOC_GET_PAGE_ENTRY:
175 if (copy_from_user(&gentry, arg, sizeof gentry))
176 return -EFAULT;
177 break;
178#ifdef CONFIG_COMPAT
179 case MTRRIOC32_ADD_ENTRY:
180 case MTRRIOC32_SET_ENTRY:
181 case MTRRIOC32_DEL_ENTRY:
182 case MTRRIOC32_KILL_ENTRY:
183 case MTRRIOC32_ADD_PAGE_ENTRY:
184 case MTRRIOC32_SET_PAGE_ENTRY:
185 case MTRRIOC32_DEL_PAGE_ENTRY:
186 case MTRRIOC32_KILL_PAGE_ENTRY: {
187 struct mtrr_sentry32 __user *s32 = (struct mtrr_sentry32 __user *)__arg;
188 err = get_user(sentry.base, &s32->base);
189 err |= get_user(sentry.size, &s32->size);
190 err |= get_user(sentry.type, &s32->type);
191 if (err)
192 return err;
193 break;
194 }
195 case MTRRIOC32_GET_ENTRY:
196 case MTRRIOC32_GET_PAGE_ENTRY: {
197 struct mtrr_gentry32 __user *g32 = (struct mtrr_gentry32 __user *)__arg;
198 err = get_user(gentry.regnum, &g32->regnum);
199 err |= get_user(gentry.base, &g32->base);
200 err |= get_user(gentry.size, &g32->size);
201 err |= get_user(gentry.type, &g32->type);
202 if (err)
203 return err;
204 break;
205 }
206#endif
207 }
208
209 switch (cmd) {
163 default: 210 default:
164 return -ENOTTY; 211 return -ENOTTY;
165 case MTRRIOC_ADD_ENTRY: 212 case MTRRIOC_ADD_ENTRY:
166 if (!capable(CAP_SYS_ADMIN)) 213 if (!capable(CAP_SYS_ADMIN))
167 return -EPERM; 214 return -EPERM;
168 if (copy_from_user(&sentry, arg, sizeof sentry))
169 return -EFAULT;
170 err = 215 err =
171 mtrr_file_add(sentry.base, sentry.size, sentry.type, 1, 216 mtrr_file_add(sentry.base, sentry.size, sentry.type, 1,
172 file, 0); 217 file, 0);
173 if (err < 0)
174 return err;
175 break; 218 break;
176 case MTRRIOC_SET_ENTRY: 219 case MTRRIOC_SET_ENTRY:
177 if (!capable(CAP_SYS_ADMIN)) 220 if (!capable(CAP_SYS_ADMIN))
178 return -EPERM; 221 return -EPERM;
179 if (copy_from_user(&sentry, arg, sizeof sentry))
180 return -EFAULT;
181 err = mtrr_add(sentry.base, sentry.size, sentry.type, 0); 222 err = mtrr_add(sentry.base, sentry.size, sentry.type, 0);
182 if (err < 0)
183 return err;
184 break; 223 break;
185 case MTRRIOC_DEL_ENTRY: 224 case MTRRIOC_DEL_ENTRY:
186 if (!capable(CAP_SYS_ADMIN)) 225 if (!capable(CAP_SYS_ADMIN))
187 return -EPERM; 226 return -EPERM;
188 if (copy_from_user(&sentry, arg, sizeof sentry))
189 return -EFAULT;
190 err = mtrr_file_del(sentry.base, sentry.size, file, 0); 227 err = mtrr_file_del(sentry.base, sentry.size, file, 0);
191 if (err < 0)
192 return err;
193 break; 228 break;
194 case MTRRIOC_KILL_ENTRY: 229 case MTRRIOC_KILL_ENTRY:
195 if (!capable(CAP_SYS_ADMIN)) 230 if (!capable(CAP_SYS_ADMIN))
196 return -EPERM; 231 return -EPERM;
197 if (copy_from_user(&sentry, arg, sizeof sentry))
198 return -EFAULT;
199 err = mtrr_del(-1, sentry.base, sentry.size); 232 err = mtrr_del(-1, sentry.base, sentry.size);
200 if (err < 0)
201 return err;
202 break; 233 break;
203 case MTRRIOC_GET_ENTRY: 234 case MTRRIOC_GET_ENTRY:
204 if (copy_from_user(&gentry, arg, sizeof gentry))
205 return -EFAULT;
206 if (gentry.regnum >= num_var_ranges) 235 if (gentry.regnum >= num_var_ranges)
207 return -EINVAL; 236 return -EINVAL;
208 mtrr_if->get(gentry.regnum, &gentry.base, &gentry.size, &type); 237 mtrr_if->get(gentry.regnum, &gentry.base, &gentry.size, &type);
@@ -217,60 +246,59 @@ mtrr_ioctl(struct inode *inode, struct file *file,
217 gentry.type = type; 246 gentry.type = type;
218 } 247 }
219 248
220 if (copy_to_user(arg, &gentry, sizeof gentry))
221 return -EFAULT;
222 break; 249 break;
223 case MTRRIOC_ADD_PAGE_ENTRY: 250 case MTRRIOC_ADD_PAGE_ENTRY:
224 if (!capable(CAP_SYS_ADMIN)) 251 if (!capable(CAP_SYS_ADMIN))
225 return -EPERM; 252 return -EPERM;
226 if (copy_from_user(&sentry, arg, sizeof sentry))
227 return -EFAULT;
228 err = 253 err =
229 mtrr_file_add(sentry.base, sentry.size, sentry.type, 1, 254 mtrr_file_add(sentry.base, sentry.size, sentry.type, 1,
230 file, 1); 255 file, 1);
231 if (err < 0)
232 return err;
233 break; 256 break;
234 case MTRRIOC_SET_PAGE_ENTRY: 257 case MTRRIOC_SET_PAGE_ENTRY:
235 if (!capable(CAP_SYS_ADMIN)) 258 if (!capable(CAP_SYS_ADMIN))
236 return -EPERM; 259 return -EPERM;
237 if (copy_from_user(&sentry, arg, sizeof sentry))
238 return -EFAULT;
239 err = mtrr_add_page(sentry.base, sentry.size, sentry.type, 0); 260 err = mtrr_add_page(sentry.base, sentry.size, sentry.type, 0);
240 if (err < 0)
241 return err;
242 break; 261 break;
243 case MTRRIOC_DEL_PAGE_ENTRY: 262 case MTRRIOC_DEL_PAGE_ENTRY:
244 if (!capable(CAP_SYS_ADMIN)) 263 if (!capable(CAP_SYS_ADMIN))
245 return -EPERM; 264 return -EPERM;
246 if (copy_from_user(&sentry, arg, sizeof sentry))
247 return -EFAULT;
248 err = mtrr_file_del(sentry.base, sentry.size, file, 1); 265 err = mtrr_file_del(sentry.base, sentry.size, file, 1);
249 if (err < 0)
250 return err;
251 break; 266 break;
252 case MTRRIOC_KILL_PAGE_ENTRY: 267 case MTRRIOC_KILL_PAGE_ENTRY:
253 if (!capable(CAP_SYS_ADMIN)) 268 if (!capable(CAP_SYS_ADMIN))
254 return -EPERM; 269 return -EPERM;
255 if (copy_from_user(&sentry, arg, sizeof sentry))
256 return -EFAULT;
257 err = mtrr_del_page(-1, sentry.base, sentry.size); 270 err = mtrr_del_page(-1, sentry.base, sentry.size);
258 if (err < 0)
259 return err;
260 break; 271 break;
261 case MTRRIOC_GET_PAGE_ENTRY: 272 case MTRRIOC_GET_PAGE_ENTRY:
262 if (copy_from_user(&gentry, arg, sizeof gentry))
263 return -EFAULT;
264 if (gentry.regnum >= num_var_ranges) 273 if (gentry.regnum >= num_var_ranges)
265 return -EINVAL; 274 return -EINVAL;
266 mtrr_if->get(gentry.regnum, &gentry.base, &gentry.size, &type); 275 mtrr_if->get(gentry.regnum, &gentry.base, &gentry.size, &type);
267 gentry.type = type; 276 gentry.type = type;
277 break;
278 }
279
280 if (err)
281 return err;
268 282
283 switch(cmd) {
284 case MTRRIOC_GET_ENTRY:
285 case MTRRIOC_GET_PAGE_ENTRY:
269 if (copy_to_user(arg, &gentry, sizeof gentry)) 286 if (copy_to_user(arg, &gentry, sizeof gentry))
270 return -EFAULT; 287 err = -EFAULT;
288 break;
289#ifdef CONFIG_COMPAT
290 case MTRRIOC32_GET_ENTRY:
291 case MTRRIOC32_GET_PAGE_ENTRY: {
292 struct mtrr_gentry32 __user *g32 = (struct mtrr_gentry32 __user *)__arg;
293 err = put_user(gentry.base, &g32->base);
294 err |= put_user(gentry.size, &g32->size);
295 err |= put_user(gentry.regnum, &g32->regnum);
296 err |= put_user(gentry.type, &g32->type);
271 break; 297 break;
272 } 298 }
273 return 0; 299#endif
300 }
301 return err;
274} 302}
275 303
276static int 304static int
@@ -310,7 +338,8 @@ static struct file_operations mtrr_fops = {
310 .read = seq_read, 338 .read = seq_read,
311 .llseek = seq_lseek, 339 .llseek = seq_lseek,
312 .write = mtrr_write, 340 .write = mtrr_write,
313 .ioctl = mtrr_ioctl, 341 .unlocked_ioctl = mtrr_ioctl,
342 .compat_ioctl = mtrr_ioctl,
314 .release = mtrr_close, 343 .release = mtrr_close,
315}; 344};
316 345
diff --git a/arch/x86_64/ia32/ia32_ioctl.c b/arch/x86_64/ia32/ia32_ioctl.c
index 419758f19ca4..0ad5cc33b45a 100644
--- a/arch/x86_64/ia32/ia32_ioctl.c
+++ b/arch/x86_64/ia32/ia32_ioctl.c
@@ -12,7 +12,6 @@
12#define INCLUDES 12#define INCLUDES
13#include <linux/syscalls.h> 13#include <linux/syscalls.h>
14#include "compat_ioctl.c" 14#include "compat_ioctl.c"
15#include <asm/mtrr.h>
16#include <asm/ia32.h> 15#include <asm/ia32.h>
17 16
18#define CODE 17#define CODE
@@ -85,90 +84,6 @@ static int rtc32_ioctl(unsigned fd, unsigned cmd, unsigned long arg)
85 return sys_ioctl(fd,cmd,arg); 84 return sys_ioctl(fd,cmd,arg);
86} 85}
87 86
88/* /proc/mtrr ioctls */
89
90
91struct mtrr_sentry32
92{
93 compat_ulong_t base; /* Base address */
94 compat_uint_t size; /* Size of region */
95 compat_uint_t type; /* Type of region */
96};
97
98struct mtrr_gentry32
99{
100 compat_ulong_t regnum; /* Register number */
101 compat_uint_t base; /* Base address */
102 compat_uint_t size; /* Size of region */
103 compat_uint_t type; /* Type of region */
104};
105
106#define MTRR_IOCTL_BASE 'M'
107
108#define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32)
109#define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32)
110#define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32)
111#define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32)
112#define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32)
113#define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32)
114#define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32)
115#define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32)
116#define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32)
117#define MTRRIOC32_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32)
118
119
120static int mtrr_ioctl32(unsigned int fd, unsigned int cmd, unsigned long arg)
121{
122 struct mtrr_gentry g;
123 struct mtrr_sentry s;
124 int get = 0, err = 0;
125 struct mtrr_gentry32 __user *g32 = (struct mtrr_gentry32 __user *)arg;
126 mm_segment_t oldfs = get_fs();
127
128 switch (cmd) {
129#define SET(x) case MTRRIOC32_ ## x ## _ENTRY: cmd = MTRRIOC_ ## x ## _ENTRY; break
130#define GET(x) case MTRRIOC32_ ## x ## _ENTRY: cmd = MTRRIOC_ ## x ## _ENTRY; get=1; break
131 SET(ADD);
132 SET(SET);
133 SET(DEL);
134 GET(GET);
135 SET(KILL);
136 SET(ADD_PAGE);
137 SET(SET_PAGE);
138 SET(DEL_PAGE);
139 GET(GET_PAGE);
140 SET(KILL_PAGE);
141 }
142
143 if (get) {
144 err = get_user(g.regnum, &g32->regnum);
145 err |= get_user(g.base, &g32->base);
146 err |= get_user(g.size, &g32->size);
147 err |= get_user(g.type, &g32->type);
148
149 arg = (unsigned long)&g;
150 } else {
151 struct mtrr_sentry32 __user *s32 = (struct mtrr_sentry32 __user *)arg;
152 err = get_user(s.base, &s32->base);
153 err |= get_user(s.size, &s32->size);
154 err |= get_user(s.type, &s32->type);
155
156 arg = (unsigned long)&s;
157 }
158 if (err) return err;
159
160 set_fs(KERNEL_DS);
161 err = sys_ioctl(fd, cmd, arg);
162 set_fs(oldfs);
163
164 if (!err && get) {
165 err = put_user(g.base, &g32->base);
166 err |= put_user(g.size, &g32->size);
167 err |= put_user(g.regnum, &g32->regnum);
168 err |= put_user(g.type, &g32->type);
169 }
170 return err;
171}
172 87
173#define HANDLE_IOCTL(cmd,handler) { (cmd), (ioctl_trans_handler_t)(handler) }, 88#define HANDLE_IOCTL(cmd,handler) { (cmd), (ioctl_trans_handler_t)(handler) },
174#define COMPATIBLE_IOCTL(cmd) HANDLE_IOCTL(cmd,sys_ioctl) 89#define COMPATIBLE_IOCTL(cmd) HANDLE_IOCTL(cmd,sys_ioctl)
@@ -193,17 +108,6 @@ HANDLE_IOCTL(RTC_IRQP_SET32, rtc32_ioctl)
193HANDLE_IOCTL(RTC_EPOCH_READ32, rtc32_ioctl) 108HANDLE_IOCTL(RTC_EPOCH_READ32, rtc32_ioctl)
194HANDLE_IOCTL(RTC_EPOCH_SET32, rtc32_ioctl) 109HANDLE_IOCTL(RTC_EPOCH_SET32, rtc32_ioctl)
195/* take care of sizeof(sizeof()) breakage */ 110/* take care of sizeof(sizeof()) breakage */
196/* mtrr */
197HANDLE_IOCTL(MTRRIOC32_ADD_ENTRY, mtrr_ioctl32)
198HANDLE_IOCTL(MTRRIOC32_SET_ENTRY, mtrr_ioctl32)
199HANDLE_IOCTL(MTRRIOC32_DEL_ENTRY, mtrr_ioctl32)
200HANDLE_IOCTL(MTRRIOC32_GET_ENTRY, mtrr_ioctl32)
201HANDLE_IOCTL(MTRRIOC32_KILL_ENTRY, mtrr_ioctl32)
202HANDLE_IOCTL(MTRRIOC32_ADD_PAGE_ENTRY, mtrr_ioctl32)
203HANDLE_IOCTL(MTRRIOC32_SET_PAGE_ENTRY, mtrr_ioctl32)
204HANDLE_IOCTL(MTRRIOC32_DEL_PAGE_ENTRY, mtrr_ioctl32)
205HANDLE_IOCTL(MTRRIOC32_GET_PAGE_ENTRY, mtrr_ioctl32)
206HANDLE_IOCTL(MTRRIOC32_KILL_PAGE_ENTRY, mtrr_ioctl32)
207}; 111};
208 112
209int ioctl_table_size = ARRAY_SIZE(ioctl_start); 113int ioctl_table_size = ARRAY_SIZE(ioctl_start);
diff --git a/include/asm-x86_64/mtrr.h b/include/asm-x86_64/mtrr.h
index c5959d6418bb..66ac1c0f27e1 100644
--- a/include/asm-x86_64/mtrr.h
+++ b/include/asm-x86_64/mtrr.h
@@ -25,6 +25,7 @@
25 25
26#include <linux/config.h> 26#include <linux/config.h>
27#include <linux/ioctl.h> 27#include <linux/ioctl.h>
28#include <linux/compat.h>
28 29
29#define MTRR_IOCTL_BASE 'M' 30#define MTRR_IOCTL_BASE 'M'
30 31
@@ -105,4 +106,36 @@ static __inline__ int mtrr_del_page (int reg, unsigned long base,
105 106
106#endif 107#endif
107 108
109#ifdef CONFIG_COMPAT
110
111struct mtrr_sentry32
112{
113 compat_ulong_t base; /* Base address */
114 compat_uint_t size; /* Size of region */
115 compat_uint_t type; /* Type of region */
116};
117
118struct mtrr_gentry32
119{
120 compat_ulong_t regnum; /* Register number */
121 compat_uint_t base; /* Base address */
122 compat_uint_t size; /* Size of region */
123 compat_uint_t type; /* Type of region */
124};
125
126#define MTRR_IOCTL_BASE 'M'
127
128#define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32)
129#define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32)
130#define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32)
131#define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32)
132#define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32)
133#define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32)
134#define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32)
135#define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32)
136#define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32)
137#define MTRRIOC32_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32)
138
139#endif /* CONFIG_COMPAT */
140
108#endif /* _LINUX_MTRR_H */ 141#endif /* _LINUX_MTRR_H */
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-08 14:33:55 -0500