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Message-ID: <768dfe3e-c437-40cc-96a5-6c5b34b2d19d@vasilevsky.ca> Date: Thu, 22 Aug 2024 20:41:40 -0400 From: Dave Vasilevsky <dave@...ilevsky.ca> To: Baoquan He <bhe@...hat.com>, John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de> Cc: linux-kernel@...r.kernel.org, Michael Ellerman <mpe@...erman.id.au>, kexec@...ts.infradead.org, debian-powerpc@...ts.debian.org, x86@...nel.org, linux-arm-kernel@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org, linux-sh@...r.kernel.org, linux-mips@...r.kernel.org, linux-riscv@...ts.infradead.org, loongarch@...ts.linux.dev, akpm@...ux-foundation.org, ebiederm@...ssion.com, hbathini@...ux.ibm.com, piliu@...hat.com, viro@...iv.linux.org.uk, Sam James <sam@...too.org> Subject: Re: [PATCH linux-next v3 05/14] crash: clean up kdump related config items On 2024-08-22 20:04, Baoquan He wrote: > If so, below patch possiblly can fix it. Can you help check if it's OK? That removes the possibility of enabling CRASH_DUMP on PPC_BOOK3S_32, even when booting via other mechanisms. Maybe it would be best to just make it not-default? Please take a look at this patch: >From d6e5fe3a45f46f1aa01914648c443291d956de9e Mon Sep 17 00:00:00 2001 From: Dave Vasilevsky <dave@...ilevsky.ca> Date: Thu, 22 Aug 2024 20:13:46 -0400 Subject: [PATCH] powerpc: Default to CRASH_DUMP=n when Open Firmware boot is likely MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Open Firmware is unable to boot a kernel where PHYSICAL_START is non-zero, which occurs when CRASH_DUMP is on. On PPC_BOOK3S_32, the most common way of booting is Open Firmware, so most users probably don't want CRASH_DUMP. Users booting via some other mechanism can turn it on explicitly. Signed-off-by: Dave Vasilevsky <dave@...ilevsky.ca> Reported-by: Reimar Döffinger <Reimar.Doeffinger@....de> Fixes: 75bc255a7444 --- arch/arm/Kconfig | 3 +++ arch/arm64/Kconfig | 3 +++ arch/loongarch/Kconfig | 3 +++ arch/mips/Kconfig | 3 +++ arch/powerpc/Kconfig | 4 ++++ arch/riscv/Kconfig | 3 +++ arch/s390/Kconfig | 3 +++ arch/sh/Kconfig | 3 +++ arch/x86/Kconfig | 3 +++ kernel/Kconfig.kexec | 2 +- 10 files changed, 29 insertions(+), 1 deletion(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 54b2bb817a7f..200995052690 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1597,6 +1597,9 @@ config ATAGS_PROC config ARCH_SUPPORTS_CRASH_DUMP def_bool y +config ARCH_DEFAULT_CRASH_DUMP + def_bool y + config AUTO_ZRELADDR bool "Auto calculation of the decompressed kernel image address" if !ARCH_MULTIPLATFORM default !(ARCH_FOOTBRIDGE || ARCH_RPC || ARCH_SA1100) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index a2f8ff354ca6..43e08cc8204f 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1558,6 +1558,9 @@ 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 diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 70f169210b52..ce232ddcd27d 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -599,6 +599,9 @@ config ARCH_SUPPORTS_KEXEC config ARCH_SUPPORTS_CRASH_DUMP def_bool y +config ARCH_DEFAULT_CRASH_DUMP + def_bool y + config ARCH_SELECTS_CRASH_DUMP def_bool y depends on CRASH_DUMP diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 60077e576935..b547f4304d0c 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2881,6 +2881,9 @@ 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" diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index d7b09b064a8a..0f3c1f958eac 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -682,6 +682,10 @@ config RELOCATABLE_TEST config ARCH_SUPPORTS_CRASH_DUMP def_bool PPC64 || PPC_BOOK3S_32 || PPC_85xx || (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 diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 0f3cd7c3a436..eb247b5ee569 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -880,6 +880,9 @@ config ARCH_SUPPORTS_KEXEC_PURGATORY 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 diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index a822f952f64a..05a1fb408471 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -275,6 +275,9 @@ config ARCH_SUPPORTS_CRASH_DUMP This option also enables s390 zfcpdump. See also <file:Documentation/arch/s390/zfcpdump.rst> +config ARCH_DEFAULT_CRASH_DUMP + def_bool y + menu "Processor type and features" config HAVE_MARCH_Z10_FEATURES diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index 1aa3c4a0c5b2..3a6338962636 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -549,6 +549,9 @@ config ARCH_SUPPORTS_KEXEC config ARCH_SUPPORTS_CRASH_DUMP def_bool BROKEN_ON_SMP +config ARCH_DEFAULT_CRASH_DUMP + def_bool y + config ARCH_SUPPORTS_KEXEC_JUMP def_bool y diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 007bab9f2a0e..aa4666bb9e9c 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2087,6 +2087,9 @@ 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 diff --git a/kernel/Kconfig.kexec b/kernel/Kconfig.kexec index 6c34e63c88ff..4d111f871951 100644 --- a/kernel/Kconfig.kexec +++ b/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 -- 2.34.1
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