kernel.git/arch/sh/kernel/machine_kexec.c, branch linux-2.6.28.y

sh: fix kexec entry point for crash kernels

2008-08-28T05:53:03Z

The crash kernel entry point is currently checked by the kexec kernel code and only physical addresses in the reserved memory window are accepted. This means that we can't pass P2 or P1 addresses as entry points in the case of crash kernels. This patch makes sure we can start crash kernels by adding support for physical address entry points. Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt

sh: Save NUMA node data in vmcore for crash dumps.

2008-08-04T04:42:49Z

Presently the NUMA node data isn't saved on kexec. This implements a simple arch_crash_save_vmcoreinfo() for saving off the relevant data. Signed-off-by: Paul Mundt

kexec jump

2008-07-26T19:00:04Z

This patch provides an enhancement to kexec/kdump. It implements the following features: - Backup/restore memory used by the original kernel before/after kexec. - Save/restore CPU state before/after kexec. The features of this patch can be used as a general method to call program in physical mode (paging turning off). This can be used to call BIOS code under Linux. kexec-tools needs to be patched to support kexec jump. The patches and the precompiled kexec can be download from the following URL: source: http://khibernation.sourceforge.net/download/release_v10/kexec-tools/kexec-tools-src_git_kh10.tar.bz2 patches: http://khibernation.sourceforge.net/download/release_v10/kexec-tools/kexec-tools-patches_git_kh10.tar.bz2 binary: http://khibernation.sourceforge.net/download/release_v10/kexec-tools/kexec_git_kh10 Usage example of calling some physical mode code and return: 1. Compile and install patched kernel with following options selected: CONFIG_X86_32=y CONFIG_KEXEC=y CONFIG_PM=y CONFIG_KEXEC_JUMP=y 2. Build patched kexec-tool or download the pre-built one. 3. Build some physical mode executable named such as "phy_mode" 4. Boot kernel compiled in step 1. 5. Load physical mode executable with /sbin/kexec. The shell command line can be as follow: /sbin/kexec --load-preserve-context --args-none phy_mode 6. Call physical mode executable with following shell command line: /sbin/kexec -e Implementation point: To support jumping without reserving memory. One shadow backup page (source page) is allocated for each page used by kexeced code image (destination page). When do kexec_load, the image of kexeced code is loaded into source pages, and before executing, the destination pages and the source pages are swapped, so the contents of destination pages are backupped. Before jumping to the kexeced code image and after jumping back to the original kernel, the destination pages and the source pages are swapped too. C ABI (calling convention) is used as communication protocol between kernel and called code. A flag named KEXEC_PRESERVE_CONTEXT for sys_kexec_load is added to indicate that the loaded kernel image is used for jumping back. Now, only the i386 architecture is supported. Signed-off-by: Huang Ying Acked-by: Vivek Goyal Cc: "Eric W. Biederman" Cc: Pavel Machek Cc: Nigel Cunningham Cc: "Rafael J. Wysocki" Cc: Ingo Molnar Cc: Thomas Gleixner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Use extended crashkernel command line on sh

2007-10-19T18:53:51Z

This patch removes the crashkernel parsing from arch/sh/kernel/machine_kexec.c and calls the generic function, introduced in the generic patch, in setup_bootmem_allocator(). This is necessary because the amount of System RAM must be known in this function now because of the new syntax. Signed-off-by: Bernhard Walle Acked-by: Paul Mundt Cc: Vivek Goyal Cc: "Eric W. Biederman" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

sh: kdump support.

2007-05-07T02:11:56Z

This adds support for kexec based crash dumps. Signed-off-by: Paul Mundt

sh: Update kexec support for API changes.

2006-09-27T09:26:05Z

This was falling a bit behind.. Signed-off-by: Paul Mundt

Storage class should be first

2006-06-26T16:57:34Z

Storage class should be before const Signed-off-by: Tobias Klauser Signed-off-by: Adrian Bunk

[PATCH] sh: kexec() support

2006-01-17T07:15:27Z

This adds kexec() support for SH. Signed-off-by: kogiidena Signed-off-by: Paul Mundt Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds