a364008bff
This patch provides support for enabling the kdump service on riscv. After starting the kdump service, the kdump kernel can be successfully loaded, and after triggering a kernel crash, the kdump kernel can be started normally and the vmcore can be captured. Due to some issues with initrd in kexec-tools, avoid it first to provide basic riscv architecture kdump support. Tested in openeuler riscv qemu, and can also pass Mugen testing. Signed-off-by: Mingzheng Xing <xingmingzheng@iscas.ac.cn> (cherry picked from commit 7033d5da29de3ac009d36a9e5e516aaa6d58712d)