30 Sep, 2013
1 commit
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Currently copy_from_oldmem() is not able to copy to virtual memory.
When using kexec pre-allocated ELF header, copy_from_oldmem()
is used to copy the ELF notes information to vmalloc buffers.So fix this and use the new function copy_from_realmem() that allows
copying also to vmalloc memory.Signed-off-by: Michael Holzheu
Signed-off-by: Martin Schwidefsky
12 Sep, 2013
3 commits
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Modify the s390 copy_oldmem_page() and remap_oldmem_pfn_range() function
for zfcpdump to read from the HSA memory if memory below HSA_SIZE bytes is
requested. Otherwise real memory is used.Signed-off-by: Michael Holzheu
Cc: HATAYAMA Daisuke
Cc: Jan Willeke
Cc: Vivek Goyal
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Introduce the s390 specific way to map pages from oldmem. The memory area
below OLDMEM_SIZE is mapped with offset OLDMEM_BASE. The other old memory
is mapped directly.Signed-off-by: Jan Willeke
Signed-off-by: Michael Holzheu
Cc: HATAYAMA Daisuke
Cc: Vivek Goyal
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Exchange the old relocate mechanism with the new arch function call
override mechanism that allows to create the ELF core header in the 2nd
kernel.Signed-off-by: Michael Holzheu
Cc: HATAYAMA Daisuke
Cc: Jan Willeke
Cc: Vivek Goyal
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
18 Jul, 2013
1 commit
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The kdump mmap patch series (git commit 83086978c63afd7c73e1c) changed the
requirements for copy_oldmem_page(). Now this function is used for copying
to virtual memory.So implement vmalloc support for the s390 version of copy_oldmem_page().
Signed-off-by: Michael Holzheu
Signed-off-by: Martin Schwidefsky
03 May, 2013
1 commit
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Simplify the memory detection code a bit by removing the CHUNK_OLDMEM
and CHUNK_CRASHK memory types.
They are not needed. Everything that is needed is a mechanism to
insert holes into the detected memory.Reviewed-by: Michael Holzheu
Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky
02 May, 2013
1 commit
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The current memory detection loop will detect all present memory of
a machine. This is true even if the user specified the "mem=" parameter
on the kernel command line.
This can be a problem since the memory detection may cause a fully
populated host page table for the guest, even for those parts of the
memory that the guest will never use afterwards.So fix this and only detect memory up to a user supplied "mem=" limit
if specified.Reported-by: Michael Johanssen
Reviewed-by: Michael Holzheu
Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky
26 Sep, 2012
1 commit
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Move fill_cpu_elf_notes() prototype to header file.
This way we get compile errors if e.g. the number of function
parameters get changed.
Otherwise it's possible to change just the definition and everything
else still compiles fine, but the result is broken code.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky
11 Mar, 2012
1 commit
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In order to allow kdump based stand-alone dump, some information
has to be passed from the old kernel to the new dump kernel. This
is done via a the struct "os_info" that contains the following fields:
* crashkernel base and size
* reipl block
* vmcoreinfo
* init function
A pointer to os_info is stored at a well known storage location
and the whole structure as well as all fields are secured with
checksums.Signed-off-by: Michael Holzheu
Signed-off-by: Martin Schwidefsky
25 Feb, 2012
1 commit
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arch/s390/kernel/crash_dump.c included 'linux/crash_dump.h' twice,
remove the duplicate.Signed-off-by: Danny Kukawka
Signed-off-by: Martin Schwidefsky
30 Oct, 2011
2 commits
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Currently it can happen that the pre-allocated ELF header contains a wrong
memory map which would result in errors when copying /proc/vmcore.
In order to still get a valid vmcore, we (temporarily) disable the error
checking in copy_oldmem_page(). This will then produce zero pages for those
memory regions.Signed-off-by: Michael Holzheu
Signed-off-by: Martin Schwidefsky -
This patch provides the architecture specific part of the s390 kdump
support.Signed-off-by: Michael Holzheu
Signed-off-by: Martin Schwidefsky