Sourabh Jain 06ee48a4fc powerpc: Set crashkernel offset to mid of RMA region ... [ Upstream commit 7c5ed82b80 ] On large config LPARs (having 192 and more cores), Linux fails to boot due to insufficient memory in the first memblock. It is due to the memory reservation for the crash kernel which starts at 128MB offset of the first memblock. This memory reservation for the crash kernel doesn't leave enough space in the first memblock to accommodate other essential system resources. The crash kernel start address was set to 128MB offset by default to ensure that the crash kernel get some memory below the RMA region which is used to be of size 256MB. But given that the RMA region size can be 512MB or more, setting the crash kernel offset to mid of RMA size will leave enough space for the kernel to allocate memory for other system resources. Since the above crash kernel offset change is only applicable to the LPAR platform, the LPAR feature detection is pushed before the crash kernel reservation. The rest of LPAR specific initialization will still be done during pseries_probe_fw_features as usual. This patch is dependent on changes to paca allocation for boot CPU. It expect boot CPU to discover 1T segment support which is introduced by the patch posted here: https://lists.ozlabs.org/pipermail/linuxppc-dev/2022-January/239175.html Reported-by: Abdul haleem <abdhalee@linux.vnet.ibm.com> Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220204085601.107257-1-sourabhjain@linux.ibm.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-04-13 20:59:03 +02:00
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core_32.c
core_64.c	powerpc/kexec: fix for_each_child.cocci warning	2021-08-10 23:14:55 +10:00
core.c	powerpc: Set crashkernel offset to mid of RMA region	2022-04-13 20:59:03 +02:00
crash.c	Merge branch 'rework/printk_safe-removal' into for-linus	2021-08-30 16:36:10 +02:00
elf_64.c	powerpc: If kexec_build_elf_info() fails return immediately from elf64_load()	2021-04-26 16:28:26 -05:00
file_load_64.c	powerpc/kexec_file: Use current CPU info while setting up FDT	2021-05-04 22:26:57 +10:00
file_load.c	powerpc: Delete unused function delete_fdt_mem_rsv()	2021-03-08 12:06:30 -07:00
Makefile	powerpc: Move arch independent ima kexec functions to drivers/of/kexec.c	2021-03-08 12:06:29 -07:00
ranges.c	powerpc/kexec_file: Avoid stomping memory used by special regions	2020-07-29 23:47:53 +10:00
relocate_32.S	powerpc: Avoid link stack corruption in misc asm functions	2021-08-25 13:35:47 +10:00