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| author | Nick Kossifidis <mick@ics.forth.gr> | 2021-04-19 03:55:36 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2021-04-26 08:25:21 -0700 |
| commit | fba8a8674f68a0628abae470dfcfbcb4a0d7a79e (patch) | |
| tree | e062971122d415840b630031d7ee59f15f2095f7 /arch/riscv/Kconfig | |
| parent | d83e682e301071313e390e2f5ba2f6ca2ebc1848 (diff) | |
| download | lwn-fba8a8674f68a0628abae470dfcfbcb4a0d7a79e.tar.gz lwn-fba8a8674f68a0628abae470dfcfbcb4a0d7a79e.zip | |
RISC-V: Add kexec support
This patch adds support for kexec on RISC-V. On SMP systems it depends
on HOTPLUG_CPU in order to be able to bring up all harts after kexec.
It also needs a recent OpenSBI version that supports the HSM extension.
I tested it on riscv64 QEMU on both an smp and a non-smp system.
Signed-off-by: Nick Kossifidis <mick@ics.forth.gr>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/Kconfig')
| -rw-r--r-- | arch/riscv/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 847ab3c32fc0..e38bd044610f 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -391,6 +391,21 @@ config RISCV_SBI_V01 help This config allows kernel to use SBI v0.1 APIs. This will be deprecated in future once legacy M-mode software are no longer in use. + +config KEXEC + bool "Kexec system call" + select KEXEC_CORE + select HOTPLUG_CPU if SMP + depends on MMU + help + kexec is a system call that implements the ability to shutdown your + current kernel, and to start another kernel. It is like a reboot + but it is independent of the system firmware. And like a reboot + you can start any kernel with it, not just Linux. + + The name comes from the similarity to the exec system call. + + endmenu menu "Boot options" |