diff options
Diffstat (limited to 'crash-driver.patch')
| -rw-r--r-- | crash-driver.patch | 270 |
1 files changed, 196 insertions, 74 deletions
diff --git a/crash-driver.patch b/crash-driver.patch index a7b7b72f9..61c5dfd61 100644 --- a/crash-driver.patch +++ b/crash-driver.patch @@ -1,24 +1,57 @@ -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 +From 9fcd8dd1ccc20ea8d466d48e887e92b832e22d56 Mon Sep 17 00:00:00 2001 +From: Kyle McMartin <kyle@dreadnought.bos.jkkm.org> +Date: Tue, 5 Nov 2013 13:16:00 -0500 +Subject: [PATCH] crash-driver --- - 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(-) + arch/arm/include/asm/crash.h | 6 ++ + arch/arm64/include/asm/crash.h | 6 ++ + arch/ia64/include/asm/crash.h | 90 +++++++++++++++++++++++++++ + arch/ia64/kernel/ia64_ksyms.c | 3 + + arch/powerpc/include/asm/crash.h | 6 ++ + arch/s390/include/asm/crash.h | 60 ++++++++++++++++++ + arch/x86/include/asm/crash.h | 6 ++ + drivers/char/Kconfig | 3 + + drivers/char/Makefile | 2 + + drivers/char/crash.c | 128 +++++++++++++++++++++++++++++++++++++++ + include/asm-generic/crash.h | 72 ++++++++++++++++++++++ + 11 files changed, 382 insertions(+) + create mode 100644 arch/arm/include/asm/crash.h + create mode 100644 arch/arm64/include/asm/crash.h create mode 100644 arch/ia64/include/asm/crash.h + create mode 100644 arch/powerpc/include/asm/crash.h + create mode 100644 arch/s390/include/asm/crash.h create mode 100644 arch/x86/include/asm/crash.h create mode 100644 drivers/char/crash.c + create mode 100644 include/asm-generic/crash.h +diff --git a/arch/arm/include/asm/crash.h b/arch/arm/include/asm/crash.h +new file mode 100644 +index 0000000..1d2e537 +--- /dev/null ++++ b/arch/arm/include/asm/crash.h +@@ -0,0 +1,6 @@ ++#ifndef _ARM_CRASH_H ++#define _ARM_CRASH_H ++ ++#include <asm-generic/crash.h> ++ ++#endif /* _ARM_CRASH_H */ +diff --git a/arch/arm64/include/asm/crash.h b/arch/arm64/include/asm/crash.h +new file mode 100644 +index 0000000..a7fcc28 +--- /dev/null ++++ b/arch/arm64/include/asm/crash.h +@@ -0,0 +1,6 @@ ++#ifndef _ARM64_CRASH_H ++#define _ARM64_CRASH_H ++ ++#include <asm-generic/crash.h> ++ ++#endif /* _ARM64_CRASH_H */ diff --git a/arch/ia64/include/asm/crash.h b/arch/ia64/include/asm/crash.h new file mode 100644 -index 0000000..541af84 +index 0000000..28bd955 --- /dev/null +++ b/arch/ia64/include/asm/crash.h @@ -0,0 +1,90 @@ @@ -68,7 +101,7 @@ index 0000000..541af84 + return NULL; + } + -+ switch (type = efi_mem_type(offset)) ++ switch (type = efi_mem_type(offset)) + { + case EFI_LOADER_CODE: + case EFI_LOADER_DATA: @@ -79,7 +112,7 @@ index 0000000..541af84 + + default: + printk(KERN_INFO -+ "crash memory driver: invalid memory type for %lx: %d\n", ++ "crash memory driver: invalid memory type for %lx: %d\n", + offset, type); + return NULL; + } @@ -96,7 +129,7 @@ index 0000000..541af84 + + if (!page->virtual) { + printk(KERN_INFO -+ "crash memory driver: offset: %lx page: %lx page->virtual: NULL\n", ++ "crash memory driver: offset: %lx page: %lx page->virtual: NULL\n", + offset, (unsigned long)page); + return NULL; + } @@ -104,8 +137,8 @@ index 0000000..541af84 + return (page->virtual + (offset & (PAGE_SIZE-1))); +} + -+static inline void unmap_virtual(struct page *page) -+{ ++static inline void unmap_virtual(struct page *page) ++{ + return; +} + @@ -113,7 +146,7 @@ index 0000000..541af84 + +#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 +index 5b7791d..aee4b87 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); @@ -126,50 +159,47 @@ index 7f4a0ed..552fe24 100644 #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 +diff --git a/arch/powerpc/include/asm/crash.h b/arch/powerpc/include/asm/crash.h new file mode 100644 -index 0000000..dfcc006 +index 0000000..daa8c4d --- /dev/null -+++ b/arch/x86/include/asm/crash.h -@@ -0,0 +1,73 @@ -+#ifndef _ASM_I386_CRASH_H -+#define _ASM_I386_CRASH_H ++++ b/arch/powerpc/include/asm/crash.h +@@ -0,0 +1,6 @@ ++#ifndef _PPC64_CRASH_H ++#define _PPC64_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. -+ * -+ */ ++#include <asm-generic/crash.h> ++ ++#endif /* _PPC64_CRASH_H */ +diff --git a/arch/s390/include/asm/crash.h b/arch/s390/include/asm/crash.h +new file mode 100644 +index 0000000..552be5e +--- /dev/null ++++ b/arch/s390/include/asm/crash.h +@@ -0,0 +1,60 @@ ++#ifndef _S390_CRASH_H ++#define _S390_CRASH_H + +#ifdef __KERNEL__ + +#include <linux/mm.h> +#include <linux/highmem.h> -+#include <asm/mmzone.h> + -+static inline void * -+map_virtual(u64 offset, struct page **pp) ++/* ++ * For swapped prefix pages get bounce buffer using xlate_dev_mem_ptr() ++ */ ++static inline void *map_virtual(u64 offset, struct page **pp) +{ + struct page *page; + unsigned long pfn; + void *vaddr; + -+ pfn = (unsigned long)(offset >> PAGE_SHIFT); ++ vaddr = xlate_dev_mem_ptr(offset); ++ pfn = ((unsigned long) vaddr) >> PAGE_SHIFT; ++ if ((unsigned long) vaddr != offset) ++ page = pfn_to_page(pfn); ++ else ++ page = NULL; + + if (!page_is_ram(pfn)) { + printk(KERN_INFO @@ -183,30 +213,44 @@ index 0000000..dfcc006 + 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))); ++ return vaddr; +} + -+static inline void unmap_virtual(struct page *page) -+{ -+ kunmap(page); ++/* ++ * Free bounce buffer if necessary ++ */ ++static inline void unmap_virtual(struct page *page) ++{ ++ void *vaddr; ++ ++ if (page) { ++ /* ++ * Because for bounce buffers vaddr will never be 0 ++ * unxlate_dev_mem_ptr() will always free the bounce buffer. ++ */ ++ vaddr = (void *)(page_to_pfn(page) << PAGE_SHIFT); ++ unxlate_dev_mem_ptr(0, vaddr); ++ } +} + +#endif /* __KERNEL__ */ + -+#endif /* _ASM_I386_CRASH_H */ ++#endif /* _S390_CRASH_H */ +diff --git a/arch/x86/include/asm/crash.h b/arch/x86/include/asm/crash.h +new file mode 100644 +index 0000000..27a4156 +--- /dev/null ++++ b/arch/x86/include/asm/crash.h +@@ -0,0 +1,6 @@ ++#ifndef _X86_CRASH_H ++#define _X86_CRASH_H ++ ++#include <asm-generic/crash.h> ++ ++#endif /* _X86_CRASH_H */ diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig -index 423fd56..e04a561 100644 +index 1421997..72a8b74 100644 --- a/drivers/char/Kconfig +++ b/drivers/char/Kconfig @@ -4,6 +4,9 @@ @@ -220,10 +264,10 @@ index 423fd56..e04a561 100644 config DEVKMEM diff --git a/drivers/char/Makefile b/drivers/char/Makefile -index 32762ba..3d5d525 100644 +index 7ff1d0d..3ed67af 100644 --- a/drivers/char/Makefile +++ b/drivers/char/Makefile -@@ -65,3 +65,5 @@ obj-$(CONFIG_JS_RTC) += js-rtc.o +@@ -62,3 +62,5 @@ obj-$(CONFIG_JS_RTC) += js-rtc.o js-rtc-y = rtc.o obj-$(CONFIG_TILE_SROM) += tile-srom.o @@ -231,7 +275,7 @@ index 32762ba..3d5d525 100644 +obj-$(CONFIG_CRASH) += crash.o diff --git a/drivers/char/crash.c b/drivers/char/crash.c new file mode 100644 -index 0000000..e5437de +index 0000000..a142bb3 --- /dev/null +++ b/drivers/char/crash.c @@ -0,0 +1,128 @@ @@ -276,7 +320,7 @@ index 0000000..e5437de + * access to physical memory. + */ + -+static loff_t ++static loff_t +crash_llseek(struct file * file, loff_t offset, int orig) +{ + switch (orig) { @@ -292,7 +336,7 @@ index 0000000..e5437de +} + +/* -+ * Determine the page address for an address offset value, ++ * 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. + */ @@ -305,7 +349,7 @@ index 0000000..e5437de + ssize_t read; + + offset = *poff; -+ if (offset >> PAGE_SHIFT != (offset+count-1) >> PAGE_SHIFT) ++ if (offset >> PAGE_SHIFT != (offset+count-1) >> PAGE_SHIFT) + return -EINVAL; + + vaddr = map_virtual(offset, &page); @@ -342,11 +386,11 @@ index 0000000..e5437de + + ret = misc_register(&crash_dev); + if (ret) { -+ printk(KERN_ERR ++ 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: @@ -363,6 +407,84 @@ index 0000000..e5437de +module_exit(crash_cleanup_module); + +MODULE_LICENSE("GPL"); +diff --git a/include/asm-generic/crash.h b/include/asm-generic/crash.h +new file mode 100644 +index 0000000..8a0a69a +--- /dev/null ++++ b/include/asm-generic/crash.h +@@ -0,0 +1,72 @@ ++#ifndef __CRASH_H__ ++#define __CRASH_H__ ++ ++/* ++ * include/linux/crash.h ++ * ++ * Copyright (c) 2013 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> ++ ++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 /* __CRASH_H__ */ -- -1.7.6 +1.8.3.1 |