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authorPalmer Dabbelt2022-05-19 15:18:47 -0700
committerPalmer Dabbelt2022-05-19 16:26:50 -0700
commit83a7a614ce584c469bf8abfc2cd539701bd7d4e9 (patch)
tree0ee08a965ab0cdae1f7c33c511d4e0603ed74a57 /arch/riscv/Kconfig
parent7eb6369d7acfe87df73848b3757c648e8f352b86 (diff)
parent838b3e28488f702e2b5477b393f009b2639d2b1a (diff)
riscv: kexec: add kexec_file_load() support
This patch set implements kexec_file_load() for RISC-V, which is currently only allowed on rv64 due to some minor build issues on 32-bit platforms in the generic code. This allows users to kexec() using an FD as opposed to a buffer. Link: https://lore.kernel.org/all/20220408100914.150110-1-lizhengyu3@huawei.com/ * palmer/riscv-kexec_file: RISC-V: Load purgatory in kexec_file RISC-V: Add purgatory RISC-V: Support for kexec_file on panic RISC-V: Add kexec_file support RISC-V: use memcpy for kexec_file mode kexec_file: Fix kexec_file.c build error for riscv platform
Diffstat (limited to 'arch/riscv/Kconfig')
-rw-r--r--arch/riscv/Kconfig20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index cad2d42a77d9..0f1dc11b5d7f 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -418,6 +418,26 @@ config KEXEC
The name comes from the similarity to the exec system call.
+config KEXEC_FILE
+ bool "kexec file based systmem call"
+ select KEXEC_CORE
+ select KEXEC_ELF
+ select HAVE_IMA_KEXEC if IMA
+ depends on 64BIT
+ help
+ This is new version of kexec system call. This system call is
+ file based and takes file descriptors as system call argument
+ for kernel and initramfs as opposed to list of segments as
+ accepted by previous system call.
+
+ If you don't know what to do here, say Y.
+
+config ARCH_HAS_KEXEC_PURGATORY
+ def_bool KEXEC_FILE
+ select BUILD_BIN2C
+ depends on CRYPTO=y
+ depends on CRYPTO_SHA256=y
+
config CRASH_DUMP
bool "Build kdump crash kernel"
help