diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-14 07:56:43 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-14 07:56:43 -0700 |
commit | 15b0404272e1513940223cf9eefadfd22804a060 (patch) | |
tree | 9bdb1c0a41d0c3bddbae8885d361e053bbcd6d97 /arch/x86/kernel/cpu/mtrr/if.c | |
parent | 9b74aec028e7d7ce57b8deef490e440003555520 (diff) | |
parent | d535e4319a2e598ba25dc966ada4e52ea774e33f (diff) |
Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: Make memtype_seq_ops const
x86: uv: Clean up uv_ptc_init(), use proc_create()
x86: Use printk_once()
x86/cpu: Clean up various files a bit
x86: Remove duplicated #include
x86, ipi: Clean up safe_smp_processor_id() by using the cpu_has_apic() macro helper
x86: Clean up idt_descr and idt_tableby using NR_VECTORS instead of hardcoded number
x86: Further clean up of mtrr/generic.c
x86: Clean up mtrr/main.c
x86: Clean up mtrr/state.c
x86: Clean up mtrr/mtrr.h
x86: Clean up mtrr/if.c
x86: Clean up mtrr/generic.c
x86: Clean up mtrr/cyrix.c
x86: Clean up mtrr/cleanup.c
x86: Clean up mtrr/centaur.c
x86: Clean up mtrr/amd.c:
x86: ds.c fix invalid assignment
Diffstat (limited to 'arch/x86/kernel/cpu/mtrr/if.c')
-rw-r--r-- | arch/x86/kernel/cpu/mtrr/if.c | 135 |
1 files changed, 76 insertions, 59 deletions
diff --git a/arch/x86/kernel/cpu/mtrr/if.c b/arch/x86/kernel/cpu/mtrr/if.c index fb73a52913a..08b6ea4c62b 100644 --- a/arch/x86/kernel/cpu/mtrr/if.c +++ b/arch/x86/kernel/cpu/mtrr/if.c @@ -1,27 +1,28 @@ -#include <linux/init.h> -#include <linux/proc_fs.h> #include <linux/capability.h> -#include <linux/ctype.h> -#include <linux/module.h> #include <linux/seq_file.h> -#include <asm/uaccess.h> +#include <linux/uaccess.h> +#include <linux/proc_fs.h> +#include <linux/module.h> +#include <linux/ctype.h> +#include <linux/init.h> #define LINE_SIZE 80 #include <asm/mtrr.h> + #include "mtrr.h" #define FILE_FCOUNT(f) (((struct seq_file *)((f)->private_data))->private) static const char *const mtrr_strings[MTRR_NUM_TYPES] = { - "uncachable", /* 0 */ - "write-combining", /* 1 */ - "?", /* 2 */ - "?", /* 3 */ - "write-through", /* 4 */ - "write-protect", /* 5 */ - "write-back", /* 6 */ + "uncachable", /* 0 */ + "write-combining", /* 1 */ + "?", /* 2 */ + "?", /* 3 */ + "write-through", /* 4 */ + "write-protect", /* 5 */ + "write-back", /* 6 */ }; const char *mtrr_attrib_to_str(int x) @@ -35,8 +36,8 @@ static int mtrr_file_add(unsigned long base, unsigned long size, unsigned int type, bool increment, struct file *file, int page) { + unsigned int *fcount = FILE_FCOUNT(file); int reg, max; - unsigned int *fcount = FILE_FCOUNT(file); max = num_var_ranges; if (fcount == NULL) { @@ -61,8 +62,8 @@ static int mtrr_file_del(unsigned long base, unsigned long size, struct file *file, int page) { - int reg; unsigned int *fcount = FILE_FCOUNT(file); + int reg; if (!page) { if ((base & (PAGE_SIZE - 1)) || (size & (PAGE_SIZE - 1))) @@ -81,13 +82,14 @@ mtrr_file_del(unsigned long base, unsigned long size, return reg; } -/* RED-PEN: seq_file can seek now. this is ignored. */ +/* + * seq_file can seek but we ignore it. + * + * Format of control line: + * "base=%Lx size=%Lx type=%s" or "disable=%d" + */ static ssize_t mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos) -/* Format of control line: - "base=%Lx size=%Lx type=%s" OR: - "disable=%d" -*/ { int i, err; unsigned long reg; @@ -100,15 +102,18 @@ mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos) return -EPERM; if (!len) return -EINVAL; + memset(line, 0, LINE_SIZE); if (len > LINE_SIZE) len = LINE_SIZE; if (copy_from_user(line, buf, len - 1)) return -EFAULT; + linelen = strlen(line); ptr = line + linelen - 1; if (linelen && *ptr == '\n') *ptr = '\0'; + if (!strncmp(line, "disable=", 8)) { reg = simple_strtoul(line + 8, &ptr, 0); err = mtrr_del_page(reg, 0, 0); @@ -116,28 +121,35 @@ mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos) return err; return len; } + if (strncmp(line, "base=", 5)) return -EINVAL; + base = simple_strtoull(line + 5, &ptr, 0); - for (; isspace(*ptr); ++ptr) ; + for (; isspace(*ptr); ++ptr) + ; + if (strncmp(ptr, "size=", 5)) return -EINVAL; + size = simple_strtoull(ptr + 5, &ptr, 0); if ((base & 0xfff) || (size & 0xfff)) return -EINVAL; - for (; isspace(*ptr); ++ptr) ; + for (; isspace(*ptr); ++ptr) + ; + if (strncmp(ptr, "type=", 5)) return -EINVAL; ptr += 5; - for (; isspace(*ptr); ++ptr) ; + for (; isspace(*ptr); ++ptr) + ; + for (i = 0; i < MTRR_NUM_TYPES; ++i) { if (strcmp(ptr, mtrr_strings[i])) continue; base >>= PAGE_SHIFT; size >>= PAGE_SHIFT; - err = - mtrr_add_page((unsigned long) base, (unsigned long) size, i, - true); + err = mtrr_add_page((unsigned long)base, (unsigned long)size, i, true); if (err < 0) return err; return len; @@ -181,7 +193,9 @@ mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg) 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; + struct mtrr_sentry32 __user *s32; + + 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); @@ -191,7 +205,9 @@ mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg) } case MTRRIOC32_GET_ENTRY: case MTRRIOC32_GET_PAGE_ENTRY: { - struct mtrr_gentry32 __user *g32 = (struct mtrr_gentry32 __user *)__arg; + struct mtrr_gentry32 __user *g32; + + 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); @@ -314,7 +330,7 @@ mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg) if (err) return err; - switch(cmd) { + switch (cmd) { case MTRRIOC_GET_ENTRY: case MTRRIOC_GET_PAGE_ENTRY: if (copy_to_user(arg, &gentry, sizeof gentry)) @@ -323,7 +339,9 @@ mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg) #ifdef CONFIG_COMPAT case MTRRIOC32_GET_ENTRY: case MTRRIOC32_GET_PAGE_ENTRY: { - struct mtrr_gentry32 __user *g32 = (struct mtrr_gentry32 __user *)__arg; + struct mtrr_gentry32 __user *g32; + + 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); @@ -335,11 +353,10 @@ mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg) return err; } -static int -mtrr_close(struct inode *ino, struct file *file) +static int mtrr_close(struct inode *ino, struct file *file) { - int i, max; unsigned int *fcount = FILE_FCOUNT(file); + int i, max; if (fcount != NULL) { max = num_var_ranges; @@ -359,22 +376,22 @@ static int mtrr_seq_show(struct seq_file *seq, void *offset); static int mtrr_open(struct inode *inode, struct file *file) { - if (!mtrr_if) + if (!mtrr_if) return -EIO; - if (!mtrr_if->get) - return -ENXIO; + if (!mtrr_if->get) + return -ENXIO; return single_open(file, mtrr_seq_show, NULL); } static const struct file_operations mtrr_fops = { - .owner = THIS_MODULE, - .open = mtrr_open, - .read = seq_read, - .llseek = seq_lseek, - .write = mtrr_write, - .unlocked_ioctl = mtrr_ioctl, - .compat_ioctl = mtrr_ioctl, - .release = mtrr_close, + .owner = THIS_MODULE, + .open = mtrr_open, + .read = seq_read, + .llseek = seq_lseek, + .write = mtrr_write, + .unlocked_ioctl = mtrr_ioctl, + .compat_ioctl = mtrr_ioctl, + .release = mtrr_close, }; static int mtrr_seq_show(struct seq_file *seq, void *offset) @@ -388,23 +405,24 @@ static int mtrr_seq_show(struct seq_file *seq, void *offset) max = num_var_ranges; for (i = 0; i < max; i++) { mtrr_if->get(i, &base, &size, &type); - if (size == 0) + if (size == 0) { mtrr_usage_table[i] = 0; - else { - if (size < (0x100000 >> PAGE_SHIFT)) { - /* less than 1MB */ - factor = 'K'; - size <<= PAGE_SHIFT - 10; - } else { - factor = 'M'; - size >>= 20 - PAGE_SHIFT; - } - /* RED-PEN: base can be > 32bit */ - len += seq_printf(seq, - "reg%02i: base=0x%06lx000 (%5luMB), size=%5lu%cB, count=%d: %s\n", - i, base, base >> (20 - PAGE_SHIFT), size, factor, - mtrr_usage_table[i], mtrr_attrib_to_str(type)); + continue; } + if (size < (0x100000 >> PAGE_SHIFT)) { + /* less than 1MB */ + factor = 'K'; + size <<= PAGE_SHIFT - 10; + } else { + factor = 'M'; + size >>= 20 - PAGE_SHIFT; + } + /* Base can be > 32bit */ + len += seq_printf(seq, "reg%02i: base=0x%06lx000 " + "(%5luMB), size=%5lu%cB, count=%d: %s\n", + i, base, base >> (20 - PAGE_SHIFT), size, + factor, mtrr_usage_table[i], + mtrr_attrib_to_str(type)); } return 0; } @@ -422,6 +440,5 @@ static int __init mtrr_if_init(void) proc_create("mtrr", S_IWUSR | S_IRUGO, NULL, &mtrr_fops); return 0; } - arch_initcall(mtrr_if_init); #endif /* CONFIG_PROC_FS */ |