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  • Nick Kossifidis's avatar
    RISC-V: Add kdump support · e53d2818
    Nick Kossifidis authored
    This patch adds support for kdump, the kernel will reserve a
    region for the crash kernel and jump there on panic. In order
    for userspace tools (kexec-tools) to prepare the crash kernel
    kexec image, we also need to expose some information on
    /proc/iomem for the memory regions used by the kernel and for
    the region reserved for crash kernel. Note that on userspace
    the device tree is used to determine the system's memory
    layout so the "System RAM" on /proc/iomem is ignored.
    I tested this on riscv64 qemu and works as expected, you may
    test it by triggering a crash through /proc/sysrq_trigger:
    echo c > /proc/sysrq_trigger
    Signed-off-by: default avatarNick Kossifidis <>
    Signed-off-by: default avatarPalmer Dabbelt <>