wireguard-linux/arch/csky/kernel/smp.c, branch jd/unified-crypt-queue

csky: Fixup cpu speculative execution to IO area

2020-04-03T04:40:07Z

For the memory size ( > 512MB, < 1GB), the MSA setting is: - SSEG0: PHY_START , PHY_START + 512MB - SSEG1: PHY_START + 512MB, PHY_START + 1GB But the real memory is no more than 1GB, there is a gap between the end size of memory and border of 1GB. CPU could speculatively execute to that gap and if the gap of the bus couldn't respond to the CPU request, then the crash will happen. Now make the setting with: - SSEG0: PHY_START , PHY_START + 512MB (no change) - SSEG1: Disabled (We use highmem to use the memory of 512MB~1GB) We also deprecated zhole_szie[] settings, it's only used by arm style CPUs. All memory gap should use Reserved setting of dts in csky system. Signed-off-by: Guo Ren

csky: Fixup init_fpu compile warning with __init

2020-03-08T12:55:14Z

WARNING: vmlinux.o(.text+0x2366): Section mismatch in reference from the function csky_start_secondary() to the function .init.text:init_fpu() The function csky_start_secondary() references the function __init init_fpu(). This is often because csky_start_secondary lacks a __init annotation or the annotation of init_fpu is wrong. Reported-by: Lu Chongzhi Signed-off-by: Guo Ren

csky/smp: Fixup boot failed when CONFIG_SMP

2020-02-21T07:43:24Z

If we use a non-ipi-support interrupt controller, it will cause panic here. We should let cpu up and work with CONFIG_SMP, when we use a non-ipi intc. Signed-off-by: Guo Ren

csky: Revert mmu ASID mechanism

2019-07-19T06:21:36Z

Current C-SKY ASID mechanism is from mips and it doesn't work well with multi-cores. ASID per core mechanism is not suitable for C-SKY SMP tlb maintain operations, eg: tlbi.vas need share the same asid in all processors and it'll invalid the tlb entry in all cores with the same asid. This patch is prepare for new ASID mechanism. Signed-off-by: Guo Ren Cc: Arnd Bergmann

csky: coding convention: Use task_stack_page

2019-02-13T01:48:14Z

Use task_stack_page instead of p->stack to get stack. Follow the coding convention style. Also for init_stack, the same with other archs. Signed-off-by: Guo Ren

csky: CPU-hotplug supported for SMP

2018-12-31T15:03:53Z

This is a simple implement of CPU-hotplug for power saving. CPU use wait instruction to enter power saving mode and waiting for IPI wakeup signal. Signed-off-by: Guo Ren

csky: Don't leak device tree node reference

2018-12-30T12:25:39Z

of_find_node_by_type() acquires a reference to the node returned by it and that reference needs to be dropped by its caller. setup_smp() doesn't do that, so fix it by converting to for_each_of_cpu_node(). Signed-off-by: Yangtao Li Signed-off-by: Guo Ren

csky: SMP support

2018-10-25T16:54:26Z

This patch adds boot, ipi, hotplug codes for SMP. Signed-off-by: Guo Ren Cc: Marc Zyngier Cc: Mark Rutland Cc: Peter Zijlstra Reviewed-by: Arnd Bergmann