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Since kernel commit a5980d064fe2 ("powerpc: Bump COMMAND_LINE_SIZE
to 2048"), powerpc bumped command line size to 2048 but the size
used here is still the default value of 512. Bump it to 2048 to
fix command line overflow errors observed when command line length
is above 512 bytes. Also, get rid of the multiple definitions of
COMMAND_LINE_SIZE macro in ppc architecture.
Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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On PowerNV platform, OPAL region is overlapped with crashkernel, need to
create ELF Program header for the overlapped memory. The changes are
similar to the way RTAS region was handled.
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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By replacing all the explicit align opertion with marco _ALIGN*,
the code logic could be more clear.
Besides, remove the duplicate _ALIGN_* definition in file
kexec/arch/ppc/crashdump-powerpc.h.
Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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So far powerpc kernel never exported memory limit information which is
reflected by mem= kernel cmdline option. Hence, kexec-tools always used
to build ELF header for entire system RAM generating a dump bigger than
the actual memory used by the first kernel.
This patch now reads the memory limit information from device-tree file and
limits the crash memory ranges accordingly.
Suzuki tested this patch on ppc32(ppc440) with a kernel patch by Suzuki.
The following are the upstream kernel commits that exports memory limit
information through /proc/device-tree file:
4bc77a5ed - powerpc: Export memory limit via device tree
a84fcd468 - powerpc: Change memory_limit from phys_addr_t to unsigned
long long
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Tested-by: Suzuki K. Poulose <suzuki@in.ibm.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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Disable backup regions for BookE in case of a CRASH Dump, as they can
be run from anywhere.
The patch introduces --with-booke option to support the BookE.
With the patch, we get :
## On a 256M machine:
# busybox cat /proc/cmdline
init=/bin/init console=ttyS0,16550 crashkernel=128M@100M
# kexec -p root/vmlinux
usable memory rgns size:1 base:6400000 size:8000000
CRASH MEMORY RANGES
0000000000000000-0000000006400000
000000000e400000-0000000010000000
Command line after adding elfcorehdr: elfcorehdr=112380K
Command line after adding elfcorehdr: elfcorehdr=112380K savemaxmem=256M
Signed-off-by: Suzuki K. Poulose<suzuki@in.ibm.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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Signed-off-by: Maxim Uvarov <muvarov@gmail.com>
Signed-off-by: Maxim Uvarov <muvarov@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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