• Javi Merino's avatar
    arm64: kernel: initialise cpu_logical_map from the DT · 4c7aa002
    Javi Merino authored
    When booting the kernel, the cpu logical id map must be initialised
    using device tree data passed by FW or through an embedded blob.
    This patch parses the reg property in device tree "cpu" nodes,
    retrieves the corresponding CPUs hardware identifiers (MPIDR) and
    initialises the cpu logical map accordingly.
    The device tree HW identifiers are considered valid if all CPU nodes
    contain a "reg" property, there are no duplicate "reg" entries and the
    DT defines a CPU node whose "reg" property defines affinity levels
    that matches those of the boot CPU.
    The primary CPU is assigned cpu logical number 0 to keep the current
    convention valid.
    Based on a0ae0240
     (ARM: kernel: add
    device tree init map function).
    Signed-off-by: default avatarJavi Merino <javi.merino@arm.com>
    Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
setup.c 8.79 KB