diff options
Diffstat (limited to 'crash-driver.patch')
| -rw-r--r-- | crash-driver.patch | 383 |
1 files changed, 383 insertions, 0 deletions
diff --git a/crash-driver.patch b/crash-driver.patch new file mode 100644 index 000000000..239f0f6a0 --- /dev/null +++ b/crash-driver.patch @@ -0,0 +1,383 @@ +From f72d640713d01b3b704c6e84ab49b62f19fc9c22 Mon Sep 17 00:00:00 2001 +From: Kyle McMartin <kyle@phobos.i.jkkm.org> +Date: Tue, 30 Mar 2010 00:16:25 -0400 +Subject: [PATCH] dev-crash-driver.patch + +--- + arch/ia64/include/asm/crash.h | 90 +++++++++++++++++++++++++++++ + arch/ia64/kernel/ia64_ksyms.c | 3 + + arch/x86/include/asm/crash.h | 75 ++++++++++++++++++++++++ + arch/x86/mm/ioremap.c | 2 + + drivers/char/Kconfig | 3 + + drivers/char/Makefile | 2 + + drivers/char/crash.c | 128 +++++++++++++++++++++++++++++++++++++++++ + 7 files changed, 303 insertions(+), 0 deletions(-) + create mode 100644 arch/ia64/include/asm/crash.h + create mode 100644 arch/x86/include/asm/crash.h + create mode 100644 drivers/char/crash.c + +diff --git a/arch/ia64/include/asm/crash.h b/arch/ia64/include/asm/crash.h +new file mode 100644 +index 0000000..541af84 +--- /dev/null ++++ b/arch/ia64/include/asm/crash.h +@@ -0,0 +1,90 @@ ++#ifndef _ASM_IA64_CRASH_H ++#define _ASM_IA64_CRASH_H ++ ++/* ++ * linux/include/asm-ia64/crash.h ++ * ++ * Copyright (c) 2004 Red Hat, Inc. All rights reserved. ++ * ++ * 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, or (at your option) ++ * any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. ++ * ++ */ ++ ++#ifdef __KERNEL__ ++ ++#include <linux/efi.h> ++#include <linux/mm.h> ++#include <asm/mmzone.h> ++ ++static inline void * ++map_virtual(u64 offset, struct page **pp) ++{ ++ struct page *page; ++ unsigned long pfn; ++ u32 type; ++ ++ if (REGION_NUMBER(offset) == 5) { ++ char byte; ++ ++ if (__get_user(byte, (char *)offset) == 0) ++ return (void *)offset; ++ else ++ return NULL; ++ } ++ ++ switch (type = efi_mem_type(offset)) ++ { ++ case EFI_LOADER_CODE: ++ case EFI_LOADER_DATA: ++ case EFI_BOOT_SERVICES_CODE: ++ case EFI_BOOT_SERVICES_DATA: ++ case EFI_CONVENTIONAL_MEMORY: ++ break; ++ ++ default: ++ printk(KERN_INFO ++ "crash memory driver: invalid memory type for %lx: %d\n", ++ offset, type); ++ return NULL; ++ } ++ ++ pfn = offset >> PAGE_SHIFT; ++ ++ if (!pfn_valid(pfn)) { ++ printk(KERN_INFO ++ "crash memory driver: invalid pfn: %lx )\n", pfn); ++ return NULL; ++ } ++ ++ page = pfn_to_page(pfn); ++ ++ if (!page->virtual) { ++ printk(KERN_INFO ++ "crash memory driver: offset: %lx page: %lx page->virtual: NULL\n", ++ offset, (unsigned long)page); ++ return NULL; ++ } ++ ++ return (page->virtual + (offset & (PAGE_SIZE-1))); ++} ++ ++static inline void unmap_virtual(struct page *page) ++{ ++ return; ++} ++ ++#endif /* __KERNEL__ */ ++ ++#endif /* _ASM_IA64_CRASH_H */ +diff --git a/arch/ia64/kernel/ia64_ksyms.c b/arch/ia64/kernel/ia64_ksyms.c +index 7f4a0ed..552fe24 100644 +--- a/arch/ia64/kernel/ia64_ksyms.c ++++ b/arch/ia64/kernel/ia64_ksyms.c +@@ -84,6 +84,9 @@ EXPORT_SYMBOL(ia64_save_scratch_fpregs); + #include <asm/unwind.h> + EXPORT_SYMBOL(unw_init_running); + ++#include <linux/efi.h> ++EXPORT_SYMBOL_GPL(efi_mem_type); ++ + #if defined(CONFIG_IA64_ESI) || defined(CONFIG_IA64_ESI_MODULE) + extern void esi_call_phys (void); + EXPORT_SYMBOL_GPL(esi_call_phys); +diff --git a/arch/x86/include/asm/crash.h b/arch/x86/include/asm/crash.h +new file mode 100644 +index 0000000..dfcc006 +--- /dev/null ++++ b/arch/x86/include/asm/crash.h +@@ -0,0 +1,75 @@ ++#ifndef _ASM_I386_CRASH_H ++#define _ASM_I386_CRASH_H ++ ++/* ++ * linux/include/asm-i386/crash.h ++ * ++ * Copyright (c) 2004 Red Hat, Inc. All rights reserved. ++ * ++ * 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, or (at your option) ++ * any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. ++ * ++ */ ++ ++#ifdef __KERNEL__ ++ ++#include <linux/mm.h> ++#include <linux/highmem.h> ++#include <asm/mmzone.h> ++ ++extern int page_is_ram(unsigned long); ++ ++static inline void * ++map_virtual(u64 offset, struct page **pp) ++{ ++ struct page *page; ++ unsigned long pfn; ++ void *vaddr; ++ ++ pfn = (unsigned long)(offset >> PAGE_SHIFT); ++ ++ if (!page_is_ram(pfn)) { ++ printk(KERN_INFO ++ "crash memory driver: !page_is_ram(pfn: %lx)\n", pfn); ++ return NULL; ++ } ++ ++ if (!pfn_valid(pfn)) { ++ printk(KERN_INFO ++ "crash memory driver: invalid pfn: %lx )\n", pfn); ++ return NULL; ++ } ++ ++ page = pfn_to_page(pfn); ++ ++ vaddr = kmap(page); ++ if (!vaddr) { ++ printk(KERN_INFO ++ "crash memory driver: pfn: %lx kmap(page: %lx) failed\n", ++ pfn, (unsigned long)page); ++ return NULL; ++ } ++ ++ *pp = page; ++ return (vaddr + (offset & (PAGE_SIZE-1))); ++} ++ ++static inline void unmap_virtual(struct page *page) ++{ ++ kunmap(page); ++} ++ ++#endif /* __KERNEL__ */ ++ ++#endif /* _ASM_I386_CRASH_H */ +diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c +index be1ef57..ac659f7 100644 +--- a/arch/x86/mm/ioremap.c ++++ b/arch/x86/mm/ioremap.c +@@ -24,6 +24,8 @@ + + #include "physaddr.h" + ++EXPORT_SYMBOL_GPL(page_is_ram); ++ + /* + * Fix up the linear direct mapping of the kernel to avoid cache attribute + * conflicts. +diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig +index 423fd56..e04a561 100644 +--- a/drivers/char/Kconfig ++++ b/drivers/char/Kconfig +@@ -4,6 +4,9 @@ + + menu "Character devices" + ++config CRASH ++ tristate "Crash Utility memory driver" ++ + source "drivers/tty/Kconfig" + + config DEVKMEM +diff --git a/drivers/char/Makefile b/drivers/char/Makefile +index 32762ba..3d5d525 100644 +--- a/drivers/char/Makefile ++++ b/drivers/char/Makefile +@@ -65,3 +65,5 @@ obj-$(CONFIG_JS_RTC) += js-rtc.o + js-rtc-y = rtc.o + + obj-$(CONFIG_TILE_SROM) += tile-srom.o ++ ++obj-$(CONFIG_CRASH) += crash.o +diff --git a/drivers/char/crash.c b/drivers/char/crash.c +new file mode 100644 +index 0000000..e5437de +--- /dev/null ++++ b/drivers/char/crash.c +@@ -0,0 +1,128 @@ ++/* ++ * linux/drivers/char/crash.c ++ * ++ * Copyright (C) 2004 Dave Anderson <anderson@redhat.com> ++ * Copyright (C) 2004 Red Hat, Inc. ++ */ ++ ++/****************************************************************************** ++ * ++ * 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, or (at your option) ++ * any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. ++ * ++ *****************************************************************************/ ++ ++#include <linux/module.h> ++#include <linux/types.h> ++#include <linux/miscdevice.h> ++#include <linux/init.h> ++#include <asm/io.h> ++#include <asm/uaccess.h> ++#include <asm/types.h> ++#include <asm/crash.h> ++ ++#define CRASH_VERSION "1.0" ++ ++/* ++ * These are the file operation functions that allow crash utility ++ * access to physical memory. ++ */ ++ ++static loff_t ++crash_llseek(struct file * file, loff_t offset, int orig) ++{ ++ switch (orig) { ++ case 0: ++ file->f_pos = offset; ++ return file->f_pos; ++ case 1: ++ file->f_pos += offset; ++ return file->f_pos; ++ default: ++ return -EINVAL; ++ } ++} ++ ++/* ++ * Determine the page address for an address offset value, ++ * get a virtual address for it, and copy it out. ++ * Accesses must fit within a page. ++ */ ++static ssize_t ++crash_read(struct file *file, char *buf, size_t count, loff_t *poff) ++{ ++ void *vaddr; ++ struct page *page; ++ u64 offset; ++ ssize_t read; ++ ++ offset = *poff; ++ if (offset >> PAGE_SHIFT != (offset+count-1) >> PAGE_SHIFT) ++ return -EINVAL; ++ ++ vaddr = map_virtual(offset, &page); ++ if (!vaddr) ++ return -EFAULT; ++ ++ if (copy_to_user(buf, vaddr, count)) { ++ unmap_virtual(page); ++ return -EFAULT; ++ } ++ unmap_virtual(page); ++ ++ read = count; ++ *poff += read; ++ return read; ++} ++ ++static struct file_operations crash_fops = { ++ .owner = THIS_MODULE, ++ .llseek = crash_llseek, ++ .read = crash_read, ++}; ++ ++static struct miscdevice crash_dev = { ++ MISC_DYNAMIC_MINOR, ++ "crash", ++ &crash_fops ++}; ++ ++static int __init ++crash_init(void) ++{ ++ int ret; ++ ++ ret = misc_register(&crash_dev); ++ if (ret) { ++ printk(KERN_ERR ++ "crash memory driver: cannot misc_register (MISC_DYNAMIC_MINOR)\n"); ++ goto out; ++ } ++ ++ ret = 0; ++ printk(KERN_INFO "crash memory driver: version %s\n", CRASH_VERSION); ++out: ++ return ret; ++} ++ ++static void __exit ++crash_cleanup_module(void) ++{ ++ misc_deregister(&crash_dev); ++} ++ ++module_init(crash_init); ++module_exit(crash_cleanup_module); ++ ++MODULE_LICENSE("GPL"); +-- +1.7.6 + |