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kexec: add config option for KHO

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We have all generic code in place now to support Kexec with KHO.  This
patch adds a config option that depends on architecture support to enable
KHO support.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Alexander Graf <[email protected]>
Co-developed-by: Mike Rapoport (Microsoft) <[email protected]>
Signed-off-by: Mike Rapoport (Microsoft) <[email protected]>
Signed-off-by: Changyuan Lyu <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Anthony Yznaga <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Ashish Kalra <[email protected]>
Cc: Ben Herrenschmidt <[email protected]>
Cc: Borislav Betkov <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: David Woodhouse <[email protected]>
Cc: Eric Biederman <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: James Gowans <[email protected]>
Cc: Jason Gunthorpe <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Krzysztof Kozlowski <[email protected]>
Cc: Marc Rutland <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Pasha Tatashin <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Pratyush Yadav <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Saravana Kannan <[email protected]>
Cc: Stanislav Kinsburskii <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Thomas Gleinxer <[email protected]>
Cc: Thomas Lendacky <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
This commit is contained in:
Alexander Graf authored and Andrew Morton committed 2025-05-12 23:50:40 -07:00
1 parent 3bdecc3c93
commit 4e1d010e3b
1 file changed
+14
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kernel/Kconfig.kexec
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@@ -95,6 +95,20 @@ config KEXEC_JUMP
Jump between original kernel and kexeced kernel and invoke
code in physical address mode via KEXEC
config KEXEC_HANDOVER
bool "kexec handover"
depends on ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE
select MEMBLOCK_KHO_SCRATCH
select KEXEC_FILE
select DEBUG_FS
select LIBFDT
select CMA
help
Allow kexec to hand over state across kernels by generating and
passing additional metadata to the target kernel. This is useful
to keep data or state alive across the kexec. For this to work,
both source and target kernels need to have this option enabled.
config CRASH_DUMP
bool "kernel crash dumps"
default ARCH_DEFAULT_CRASH_DUMP