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Diffstat (limited to 'arch/i386/kernel/cpu/mtrr/if.c')
-rw-r--r--arch/i386/kernel/cpu/mtrr/if.c119
1 files changed, 74 insertions, 45 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)
return -EINVAL;
}
-static int
-mtrr_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long __arg)
+static long
+mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg)
{
- int err;
+ int err = 0;
mtrr_type type;
struct mtrr_sentry sentry;
struct mtrr_gentry gentry;
void __user *arg = (void __user *) __arg;
switch (cmd) {
+ case MTRRIOC_ADD_ENTRY:
+ case MTRRIOC_SET_ENTRY:
+ case MTRRIOC_DEL_ENTRY:
+ case MTRRIOC_KILL_ENTRY:
+ case MTRRIOC_ADD_PAGE_ENTRY:
+ case MTRRIOC_SET_PAGE_ENTRY:
+ case MTRRIOC_DEL_PAGE_ENTRY:
+ case MTRRIOC_KILL_PAGE_ENTRY:
+ if (copy_from_user(&sentry, arg, sizeof sentry))
+ return -EFAULT;
+ break;
+ case MTRRIOC_GET_ENTRY:
+ case MTRRIOC_GET_PAGE_ENTRY:
+ if (copy_from_user(&gentry, arg, sizeof gentry))
+ return -EFAULT;
+ break;
+#ifdef CONFIG_COMPAT
+ case MTRRIOC32_ADD_ENTRY:
+ case MTRRIOC32_SET_ENTRY:
+ case MTRRIOC32_DEL_ENTRY:
+ case MTRRIOC32_KILL_ENTRY:
+ case MTRRIOC32_ADD_PAGE_ENTRY:
+ case MTRRIOC32_SET_PAGE_ENTRY:
+ case MTRRIOC32_DEL_PAGE_ENTRY:
+ case MTRRIOC32_KILL_PAGE_ENTRY: {
+ struct mtrr_sentry32 __user *s32 = (struct mtrr_sentry32 __user *)__arg;
+ err = get_user(sentry.base, &s32->base);
+ err |= get_user(sentry.size, &s32->size);
+ err |= get_user(sentry.type, &s32->type);
+ if (err)
+ return err;
+ break;
+ }
+ case MTRRIOC32_GET_ENTRY:
+ case MTRRIOC32_GET_PAGE_ENTRY: {
+ struct mtrr_gentry32 __user *g32 = (struct mtrr_gentry32 __user *)__arg;
+ err = get_user(gentry.regnum, &g32->regnum);
+ err |= get_user(gentry.base, &g32->base);
+ err |= get_user(gentry.size, &g32->size);
+ err |= get_user(gentry.type, &g32->type);
+ if (err)
+ return err;
+ break;
+ }
+#endif
+ }
+
+ switch (cmd) {
default:
return -ENOTTY;
case MTRRIOC_ADD_ENTRY:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (copy_from_user(&sentry, arg, sizeof sentry))
- return -EFAULT;
err =
mtrr_file_add(sentry.base, sentry.size, sentry.type, 1,
file, 0);
- if (err < 0)
- return err;
break;
case MTRRIOC_SET_ENTRY:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (copy_from_user(&sentry, arg, sizeof sentry))
- return -EFAULT;
err = mtrr_add(sentry.base, sentry.size, sentry.type, 0);
- if (err < 0)
- return err;
break;
case MTRRIOC_DEL_ENTRY:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (copy_from_user(&sentry, arg, sizeof sentry))
- return -EFAULT;
err = mtrr_file_del(sentry.base, sentry.size, file, 0);
- if (err < 0)
- return err;
break;
case MTRRIOC_KILL_ENTRY:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (copy_from_user(&sentry, arg, sizeof sentry))
- return -EFAULT;
err = mtrr_del(-1, sentry.base, sentry.size);
- if (err < 0)
- return err;
break;
case MTRRIOC_GET_ENTRY:
- if (copy_from_user(&gentry, arg, sizeof gentry))
- return -EFAULT;
if (gentry.regnum >= num_var_ranges)
return -EINVAL;
mtrr_if->get(gentry.regnum, &gentry.base, &gentry.size, &type);
@@ -217,60 +246,59 @@ mtrr_ioctl(struct inode *inode, struct file *file,
gentry.type = type;
}
- if (copy_to_user(arg, &gentry, sizeof gentry))
- return -EFAULT;
break;
case MTRRIOC_ADD_PAGE_ENTRY:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (copy_from_user(&sentry, arg, sizeof sentry))
- return -EFAULT;
err =
mtrr_file_add(sentry.base, sentry.size, sentry.type, 1,
file, 1);
- if (err < 0)
- return err;
break;
case MTRRIOC_SET_PAGE_ENTRY:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (copy_from_user(&sentry, arg, sizeof sentry))
- return -EFAULT;
err = mtrr_add_page(sentry.base, sentry.size, sentry.type, 0);
- if (err < 0)
- return err;
break;
case MTRRIOC_DEL_PAGE_ENTRY:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (copy_from_user(&sentry, arg, sizeof sentry))
- return -EFAULT;
err = mtrr_file_del(sentry.base, sentry.size, file, 1);
- if (err < 0)
- return err;
break;
case MTRRIOC_KILL_PAGE_ENTRY:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (copy_from_user(&sentry, arg, sizeof sentry))
- return -EFAULT;
err = mtrr_del_page(-1, sentry.base, sentry.size);
- if (err < 0)
- return err;
break;
case MTRRIOC_GET_PAGE_ENTRY:
- if (copy_from_user(&gentry, arg, sizeof gentry))
- return -EFAULT;
if (gentry.regnum >= num_var_ranges)
return -EINVAL;
mtrr_if->get(gentry.regnum, &gentry.base, &gentry.size, &type);
gentry.type = type;
+ break;
+ }
+
+ if (err)
+ return err;
+ switch(cmd) {
+ case MTRRIOC_GET_ENTRY:
+ case MTRRIOC_GET_PAGE_ENTRY:
if (copy_to_user(arg, &gentry, sizeof gentry))
- return -EFAULT;
+ err = -EFAULT;
+ break;
+#ifdef CONFIG_COMPAT
+ case MTRRIOC32_GET_ENTRY:
+ case MTRRIOC32_GET_PAGE_ENTRY: {
+ struct mtrr_gentry32 __user *g32 = (struct mtrr_gentry32 __user *)__arg;
+ err = put_user(gentry.base, &g32->base);
+ err |= put_user(gentry.size, &g32->size);
+ err |= put_user(gentry.regnum, &g32->regnum);
+ err |= put_user(gentry.type, &g32->type);
break;
}
- return 0;
+#endif
+ }
+ return err;
}
static int
@@ -310,7 +338,8 @@ static struct file_operations mtrr_fops = {
.read = seq_read,
.llseek = seq_lseek,
.write = mtrr_write,
- .ioctl = mtrr_ioctl,
+ .unlocked_ioctl = mtrr_ioctl,
+ .compat_ioctl = mtrr_ioctl,
.release = mtrr_close,
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 09:59:07 +0100