crash, powerpc: default to CRASH_DUMP=n on PPC_BOOK3S_32

JIRA: https://issues.redhat.com/browse/RHEL-114163

Upstream Status: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

Conflicts: There are conflicts in arch/s390/Kconfig and
arch/powper/Kconfig due to context difference, need manually edit.

commit 31daa34
Author: Dave Vasilevsky <dave@vasilevsky.ca>
Date:   Tue Sep 17 12:37:20 2024 -0400

    crash, powerpc: default to CRASH_DUMP=n on PPC_BOOK3S_32

    Fixes boot failures on 6.9 on PPC_BOOK3S_32 machines using Open Firmware.
    On these machines, the kernel refuses to boot from non-zero
    PHYSICAL_START, which occurs when CRASH_DUMP is on.

    Since most PPC_BOOK3S_32 machines boot via Open Firmware, it should
    default to off for them.  Users booting via some other mechanism can still
    turn it on explicitly.

    Does not change the default on any other architectures for the
    time being.

    Link: https://lkml.kernel.org/r/20240917163720.1644584-1-dave@vasilevsky.ca
    Fixes: 75bc255 ("crash: clean up kdump related config items")
    Signed-off-by: Dave Vasilevsky <dave@vasilevsky.ca>
    Reported-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
    Closes: https://lists.debian.org/debian-powerpc/2024/07/msg00001.html
    Acked-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc]
    Acked-by: Baoquan He <bhe@redhat.com>
    Cc: "Eric W. Biederman" <ebiederm@xmission.com>
    Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
    Cc: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
    Cc: <stable@vger.kernel.org>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Signed-off-by: Baoquan He <bhe@redhat.com>

Author: Baoquan He

arch/arm64/Kconfig

@@ -1565,6 +1565,9 @@ config ARCH_DEFAULT_KEXEC_IMAGE_VERIFY_SIG
 config ARCH_SUPPORTS_CRASH_DUMP
 	def_bool y
 
+config ARCH_DEFAULT_CRASH_DUMP
+	def_bool y
+
 config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
 	def_bool CRASH_RESERVE
 

arch/mips/Kconfig

@@ -3059,6 +3059,9 @@ config ARCH_SUPPORTS_KEXEC
 config ARCH_SUPPORTS_CRASH_DUMP
 	def_bool y
 
+config ARCH_DEFAULT_CRASH_DUMP
+	def_bool y
+
 config PHYSICAL_START
 	hex "Physical address where the kernel is loaded"
 	default "0xffffffff84000000"

arch/powerpc/Kconfig

@@ -591,6 +591,10 @@ config CRASH_DUMP
 config ARCH_SUPPORTS_CRASH_DUMP
 	def_bool PPC64 || PPC_BOOK3S_32 || FSL_BOOKE || (44x && !SMP)
 
+config ARCH_DEFAULT_CRASH_DUMP
+	bool
+	default y if !PPC_BOOK3S_32
+
 config ARCH_SELECTS_CRASH_DUMP
 	def_bool y
 	depends on CRASH_DUMP

arch/s390/Kconfig

@@ -277,6 +277,9 @@ config ARCH_SUPPORTS_CRASH_DUMP
 	  This option also enables s390 zfcpdump.
 	  See also <file:Documentation/s390/zfcpdump.rst>
 
+config ARCH_DEFAULT_CRASH_DUMP
+	def_bool y
+
 menu "Processor type and features"
 
 config HAVE_MARCH_Z10_FEATURES

arch/x86/Kconfig

@@ -2098,6 +2098,9 @@ config ARCH_SUPPORTS_KEXEC_JUMP
 config ARCH_SUPPORTS_CRASH_DUMP
 	def_bool X86_64 || (X86_32 && HIGHMEM)
 
+config ARCH_DEFAULT_CRASH_DUMP
+	def_bool y
+
 config ARCH_SUPPORTS_CRASH_HOTPLUG
 	def_bool y
 

kernel/Kconfig.kexec

@@ -97,7 +97,7 @@ config KEXEC_JUMP
 
 config CRASH_DUMP
 	bool "kernel crash dumps"
-	default y
+	default ARCH_DEFAULT_CRASH_DUMP
 	depends on ARCH_SUPPORTS_CRASH_DUMP
 	depends on KEXEC_CORE
 	select VMCORE_INFO