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powerpc/crash: use generic crashkernel reservation

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Commit 0ab97169aa ("crash_core: add generic function to do reservation")
added a generic function to reserve crashkernel memory.  So let's use the
same function on powerpc and remove the architecture-specific code that
essentially does the same thing.

The generic crashkernel reservation also provides a way to split the
crashkernel reservation into high and low memory reservations, which can
be enabled for powerpc in the future.

Along with moving to the generic crashkernel reservation, the code related
to finding the base address for the crashkernel has been separated into
its own function name get_crash_base() for better readability and
maintainability.

Link: https://lkml.kernel.org/r/20250131113830.925179-8-sourabhjain@linux.ibm.com
Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com>
Reviewed-by: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Acked-by: Hari Bathini <hbathini@linux.ibm.com>
Cc: Baoquan he <bhe@redhat.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Sourabh Jain
2025-01-31 17:08:30 +05:30
committed by Andrew Morton
parent bce074bdbc
commit e3185ee438
5 changed files with 54 additions and 55 deletions
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3
arch/powerpc/Kconfig
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@@ -721,6 +721,9 @@ config ARCH_SUPPORTS_CRASH_HOTPLUG
def_bool y
depends on PPC64
config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
def_bool CRASH_RESERVE
config FA_DUMP
bool "Firmware-assisted dump"
depends on CRASH_DUMP && PPC64 && (PPC_RTAS || PPC_POWERNV)