diff options
| author | Jiri Slaby <jslaby@suse.cz> | 2015-03-26 10:10:17 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2015-03-27 15:05:32 +0100 |
| commit | 21042d43b34129cef00d185b7aa2705d1249f879 (patch) | |
| tree | 1931354724ff14b72baf1ac68a69d2a749492765 /arch/s390 | |
| parent | livepatch: remove unnecessary call to klp_find_object_module() (diff) | |
| download | linux-21042d43b34129cef00d185b7aa2705d1249f879.tar.xz linux-21042d43b34129cef00d185b7aa2705d1249f879.zip | |
livepatch: add support on s390
This is a trivial port from kGraft. Module relocations are not supported yet.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/Kconfig | 3 | ||||
| -rw-r--r-- | arch/s390/include/asm/livepatch.h | 43 |
2 files changed, 46 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 68b68d755fdf..eba9c1d0dab5 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -133,6 +133,7 @@ config S390 select HAVE_KPROBES select HAVE_KRETPROBES select HAVE_KVM if 64BIT + select HAVE_LIVEPATCH select HAVE_MEMBLOCK select HAVE_MEMBLOCK_NODE_MAP select HAVE_MEMBLOCK_PHYS_MAP @@ -160,6 +161,8 @@ source "init/Kconfig" source "kernel/Kconfig.freezer" +source "kernel/livepatch/Kconfig" + menu "Processor type and features" config HAVE_MARCH_Z900_FEATURES diff --git a/arch/s390/include/asm/livepatch.h b/arch/s390/include/asm/livepatch.h new file mode 100644 index 000000000000..7aa799134a11 --- /dev/null +++ b/arch/s390/include/asm/livepatch.h @@ -0,0 +1,43 @@ +/* + * livepatch.h - s390-specific Kernel Live Patching Core + * + * Copyright (c) 2013-2015 SUSE + * Authors: Jiri Kosina + * Vojtech Pavlik + * Jiri Slaby + */ + +/* + * 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. + */ + +#ifndef ASM_LIVEPATCH_H +#define ASM_LIVEPATCH_H + +#include <linux/module.h> + +#ifdef CONFIG_LIVEPATCH +static inline int klp_check_compiler_support(void) +{ + return 0; +} + +static inline int klp_write_module_reloc(struct module *mod, unsigned long + type, unsigned long loc, unsigned long value) +{ + /* not supported yet */ + return -ENOSYS; +} + +static inline void klp_arch_set_pc(struct pt_regs *regs, unsigned long ip) +{ + regs->psw.addr = ip; +} +#else +#error Live patching support is disabled; check CONFIG_LIVEPATCH +#endif + +#endif |