These patches try to add cpu hotplug support for Marvell BG2, BG2Q SoCs. These SoCs can't power off cpu independently, but we still want cpu hotplug support for them. However, we need to address "CPU still sat on kernel text" as pointed out by Mark Rutland[1]. We achieved this by putting the dying CPU in WFI state after the coherency is disabled, then asserting the dying CPU reset bit to put the CPU in reset state.
patch1 use non-self-cleared control register to reset cpu. This is to prepare for the next cpu hotplug commit. patch2 adds the cpu hotplug support finally. [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-May/342642.html Jisheng Zhang (2): arm: berlin: use non-self-cleared reset register to reset cpu arm: berlin: add CPU hotplug support arch/arm/mach-berlin/platsmp.c | 29 ++++++++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) -- 2.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/