Move KHO to kernel/liveupdate/ in preparation of placing all Live Update core kernel related files to the same place.
Signed-off-by: Pasha Tatashin <[email protected]> Reviewed-by: Jason Gunthorpe <[email protected]> Reviewed-by: Mike Rapoport (Microsoft) <[email protected]> --- Documentation/core-api/kho/concepts.rst | 2 +- MAINTAINERS | 2 +- init/Kconfig | 2 + kernel/Kconfig.kexec | 34 ---------------- kernel/Makefile | 4 +- kernel/liveupdate/Kconfig | 39 +++++++++++++++++++ kernel/liveupdate/Makefile | 5 +++ kernel/{ => liveupdate}/kexec_handover.c | 4 +- .../{ => liveupdate}/kexec_handover_debug.c | 0 .../{ => liveupdate}/kexec_handover_debugfs.c | 0 .../kexec_handover_internal.h | 0 11 files changed, 51 insertions(+), 41 deletions(-) create mode 100644 kernel/liveupdate/Kconfig create mode 100644 kernel/liveupdate/Makefile rename kernel/{ => liveupdate}/kexec_handover.c (99%) rename kernel/{ => liveupdate}/kexec_handover_debug.c (100%) rename kernel/{ => liveupdate}/kexec_handover_debugfs.c (100%) rename kernel/{ => liveupdate}/kexec_handover_internal.h (100%) diff --git a/Documentation/core-api/kho/concepts.rst b/Documentation/core-api/kho/concepts.rst index 36d5c05cfb30..d626d1dbd678 100644 --- a/Documentation/core-api/kho/concepts.rst +++ b/Documentation/core-api/kho/concepts.rst @@ -70,5 +70,5 @@ in the FDT. That state is called the KHO finalization phase. Public API ========== -.. kernel-doc:: kernel/kexec_handover.c +.. kernel-doc:: kernel/liveupdate/kexec_handover.c :export: diff --git a/MAINTAINERS b/MAINTAINERS index bdd0a1260421..764df916fae7 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13795,7 +13795,7 @@ S: Maintained F: Documentation/admin-guide/mm/kho.rst F: Documentation/core-api/kho/* F: include/linux/kexec_handover.h -F: kernel/kexec_handover* +F: kernel/liveupdate/kexec_handover* F: tools/testing/selftests/kho/ KEYS-ENCRYPTED diff --git a/init/Kconfig b/init/Kconfig index cab3ad28ca49..0605de5d96c0 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -2138,6 +2138,8 @@ config TRACEPOINTS source "kernel/Kconfig.kexec" +source "kernel/liveupdate/Kconfig" + endmenu # General setup source "arch/Kconfig" diff --git a/kernel/Kconfig.kexec b/kernel/Kconfig.kexec index cc6743137946..15632358bcf7 100644 --- a/kernel/Kconfig.kexec +++ b/kernel/Kconfig.kexec @@ -94,40 +94,6 @@ 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 - depends on !DEFERRED_STRUCT_PAGE_INIT - select MEMBLOCK_KHO_SCRATCH - select KEXEC_FILE - 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 KEXEC_HANDOVER_DEBUG - bool "Enable Kexec Handover debug checks" - depends on KEXEC_HANDOVER - help - This option enables extra sanity checks for the Kexec Handover - subsystem. Since, KHO performance is crucial in live update - scenarios and the extra code might be adding overhead it is - only optionally enabled. - -config KEXEC_HANDOVER_DEBUGFS - bool "kexec handover debugfs interface" - default KEXEC_HANDOVER - depends on KEXEC_HANDOVER - select DEBUG_FS - help - Allow to control kexec handover device tree via debugfs - interface, i.e. finalize the state or aborting the finalization. - Also, enables inspecting the KHO fdt trees with the debugfs binary - blobs. - config CRASH_DUMP bool "kernel crash dumps" default ARCH_DEFAULT_CRASH_DUMP diff --git a/kernel/Makefile b/kernel/Makefile index 2cf7909a74e5..e83669841b8c 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -52,6 +52,7 @@ obj-y += printk/ obj-y += irq/ obj-y += rcu/ obj-y += livepatch/ +obj-y += liveupdate/ obj-y += dma/ obj-y += entry/ obj-y += unwind/ @@ -82,9 +83,6 @@ obj-$(CONFIG_CRASH_DUMP_KUNIT_TEST) += crash_core_test.o obj-$(CONFIG_KEXEC) += kexec.o obj-$(CONFIG_KEXEC_FILE) += kexec_file.o obj-$(CONFIG_KEXEC_ELF) += kexec_elf.o -obj-$(CONFIG_KEXEC_HANDOVER) += kexec_handover.o -obj-$(CONFIG_KEXEC_HANDOVER_DEBUG) += kexec_handover_debug.o -obj-$(CONFIG_KEXEC_HANDOVER_DEBUGFS) += kexec_handover_debugfs.o obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o obj-$(CONFIG_COMPAT) += compat.o obj-$(CONFIG_CGROUPS) += cgroup/ diff --git a/kernel/liveupdate/Kconfig b/kernel/liveupdate/Kconfig new file mode 100644 index 000000000000..1379a4c40b09 --- /dev/null +++ b/kernel/liveupdate/Kconfig @@ -0,0 +1,39 @@ +# SPDX-License-Identifier: GPL-2.0-only + +menu "Live Update and Kexec HandOver" + +config KEXEC_HANDOVER + bool "kexec handover" + depends on ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE + depends on !DEFERRED_STRUCT_PAGE_INIT + select MEMBLOCK_KHO_SCRATCH + select KEXEC_FILE + 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 KEXEC_HANDOVER_DEBUG + bool "Enable Kexec Handover debug checks" + depends on KEXEC_HANDOVER + help + This option enables extra sanity checks for the Kexec Handover + subsystem. Since, KHO performance is crucial in live update + scenarios and the extra code might be adding overhead it is + only optionally enabled. + +config KEXEC_HANDOVER_DEBUGFS + bool "kexec handover debugfs interface" + default KEXEC_HANDOVER + depends on KEXEC_HANDOVER + select DEBUG_FS + help + Allow to control kexec handover device tree via debugfs + interface, i.e. finalize the state or aborting the finalization. + Also, enables inspecting the KHO fdt trees with the debugfs binary + blobs. + +endmenu diff --git a/kernel/liveupdate/Makefile b/kernel/liveupdate/Makefile new file mode 100644 index 000000000000..f52ce1ebcf86 --- /dev/null +++ b/kernel/liveupdate/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0 + +obj-$(CONFIG_KEXEC_HANDOVER) += kexec_handover.o +obj-$(CONFIG_KEXEC_HANDOVER_DEBUG) += kexec_handover_debug.o +obj-$(CONFIG_KEXEC_HANDOVER_DEBUGFS) += kexec_handover_debugfs.o diff --git a/kernel/kexec_handover.c b/kernel/liveupdate/kexec_handover.c similarity index 99% rename from kernel/kexec_handover.c rename to kernel/liveupdate/kexec_handover.c index 3adf86c7c2db..be945c133a2f 100644 --- a/kernel/kexec_handover.c +++ b/kernel/liveupdate/kexec_handover.c @@ -26,8 +26,8 @@ * KHO is tightly coupled with mm init and needs access to some of mm * internal APIs. */ -#include "../mm/internal.h" -#include "kexec_internal.h" +#include "../../mm/internal.h" +#include "../kexec_internal.h" #include "kexec_handover_internal.h" #define KHO_FDT_COMPATIBLE "kho-v1" diff --git a/kernel/kexec_handover_debug.c b/kernel/liveupdate/kexec_handover_debug.c similarity index 100% rename from kernel/kexec_handover_debug.c rename to kernel/liveupdate/kexec_handover_debug.c diff --git a/kernel/kexec_handover_debugfs.c b/kernel/liveupdate/kexec_handover_debugfs.c similarity index 100% rename from kernel/kexec_handover_debugfs.c rename to kernel/liveupdate/kexec_handover_debugfs.c diff --git a/kernel/kexec_handover_internal.h b/kernel/liveupdate/kexec_handover_internal.h similarity index 100% rename from kernel/kexec_handover_internal.h rename to kernel/liveupdate/kexec_handover_internal.h -- 2.51.1.930.gacf6e81ea2-goog
