diff options
Diffstat (limited to 'linux-2.6-xen-sparse/arch/i386/kernel/microcode-xen.c')
| -rw-r--r-- | linux-2.6-xen-sparse/arch/i386/kernel/microcode-xen.c | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/linux-2.6-xen-sparse/arch/i386/kernel/microcode-xen.c b/linux-2.6-xen-sparse/arch/i386/kernel/microcode-xen.c deleted file mode 100644 index 15e30d1efb..0000000000 --- a/linux-2.6-xen-sparse/arch/i386/kernel/microcode-xen.c +++ /dev/null @@ -1,144 +0,0 @@ -/* - * Intel CPU Microcode Update Driver for Linux - * - * Copyright (C) 2000-2004 Tigran Aivazian - * - * This driver allows to upgrade microcode on Intel processors - * belonging to IA-32 family - PentiumPro, Pentium II, - * Pentium III, Xeon, Pentium 4, etc. - * - * Reference: Section 8.10 of Volume III, Intel Pentium 4 Manual, - * Order Number 245472 or free download from: - * - * http://developer.intel.com/design/pentium4/manuals/245472.htm - * - * For more information, go to http://www.urbanmyth.org/microcode - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -//#define DEBUG /* pr_debug */ -#include <linux/capability.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/cpumask.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/vmalloc.h> -#include <linux/miscdevice.h> -#include <linux/spinlock.h> -#include <linux/mm.h> -#include <linux/mutex.h> -#include <linux/syscalls.h> - -#include <asm/msr.h> -#include <asm/uaccess.h> -#include <asm/processor.h> - -MODULE_DESCRIPTION("Intel CPU (IA-32) Microcode Update Driver"); -MODULE_AUTHOR("Tigran Aivazian <tigran@veritas.com>"); -MODULE_LICENSE("GPL"); - -static int verbose; -module_param(verbose, int, 0644); - -#define MICROCODE_VERSION "1.14a-xen" - -#define DEFAULT_UCODE_DATASIZE (2000) /* 2000 bytes */ -#define MC_HEADER_SIZE (sizeof (microcode_header_t)) /* 48 bytes */ -#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE) /* 2048 bytes */ - -/* no concurrent ->write()s are allowed on /dev/cpu/microcode */ -static DEFINE_MUTEX(microcode_mutex); - -static int microcode_open (struct inode *unused1, struct file *unused2) -{ - return capable(CAP_SYS_RAWIO) ? 0 : -EPERM; -} - - -static int do_microcode_update (const void __user *ubuf, size_t len) -{ - int err; - void *kbuf; - - kbuf = vmalloc(len); - if (!kbuf) - return -ENOMEM; - - if (copy_from_user(kbuf, ubuf, len) == 0) { - struct xen_platform_op op; - - op.cmd = XENPF_microcode_update; - set_xen_guest_handle(op.u.microcode.data, kbuf); - op.u.microcode.length = len; - err = HYPERVISOR_platform_op(&op); - } else - err = -EFAULT; - - vfree(kbuf); - - return err; -} - -static ssize_t microcode_write (struct file *file, const char __user *buf, size_t len, loff_t *ppos) -{ - ssize_t ret; - - if (len < MC_HEADER_SIZE) { - printk(KERN_ERR "microcode: not enough data\n"); - return -EINVAL; - } - - mutex_lock(µcode_mutex); - - ret = do_microcode_update(buf, len); - if (!ret) - ret = (ssize_t)len; - - mutex_unlock(µcode_mutex); - - return ret; -} - -static struct file_operations microcode_fops = { - .owner = THIS_MODULE, - .write = microcode_write, - .open = microcode_open, -}; - -static struct miscdevice microcode_dev = { - .minor = MICROCODE_MINOR, - .name = "microcode", - .fops = µcode_fops, -}; - -static int __init microcode_init (void) -{ - int error; - - error = misc_register(µcode_dev); - if (error) { - printk(KERN_ERR - "microcode: can't misc_register on minor=%d\n", - MICROCODE_MINOR); - return error; - } - - printk(KERN_INFO - "IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@veritas.com>\n"); - return 0; -} - -static void __exit microcode_exit (void) -{ - misc_deregister(µcode_dev); -} - -module_init(microcode_init) -module_exit(microcode_exit) -MODULE_ALIAS_MISCDEV(MICROCODE_MINOR); |