Pull arch/csky updates from Guo Ren: "Here are three main features (cpu_hotplug, basic ftrace, basic perf) and some bugfixes: Features: - Add CPU-hotplug support for SMP - Add ftrace with function trace and function graph trace - Add Perf support - Add EM_CSKY_OLD 39 - optimize kernel panic print. - remove syscall_exit_work Bugfixes: - fix abiv2 mmap(... O_SYNC) failure - fix gdb coredump error - remove vdsp implement for kernel - fix qemu failure to bootup sometimes - fix ftrace call-graph panic - fix device tree node reference leak - remove meaningless header-y - fix save hi,lo,dspcr regs in switch_stack - remove unused members in processor.h" * tag 'csky-for-linus-4.21' of git://github.com/c-sky/csky-linux: csky: Add perf support for C-SKY csky: Add EM_CSKY_OLD 39 clocksource/drivers/c-sky: fixup ftrace call-graph panic csky: ftrace call graph supported. csky: basic ftrace supported csky: remove unused members in processor.h csky: optimize kernel panic print. csky: stacktrace supported. csky: CPU-hotplug supported for SMP clocksource/drivers/c-sky: fixup qemu fail to bootup sometimes. csky: fixup save hi,lo,dspcr regs in switch_stack. csky: remove syscall_exit_work csky: fixup remove vdsp implement for kernel. csky: bugfix gdb coredump error. csky: fixup abiv2 mmap(... O_SYNC) failed. csky: define syscall_get_arch() elf-em.h: add EM_CSKY csky: remove meaningless header-y csky: Don't leak device tree node reference
This adds basic perf support for all C-SKY CPUs. Hardware events are only supported by 807/810/860. Signed-off-by: Guo Ren <ren_guo@c-sky.com>
With csky-gcc -pg -mbacktrace, ftrace call graph supported. Signed-off-by: Guo Ren <ren_guo@c-sky.com>
When gcc with -pg, it'll add _mcount stub in every function. We need implement the _mcount in kernel and ftrace depends on stackstrace. To do: call-graph, dynamic ftrace Signed-off-by: Guo Ren <ren_guo@c-sky.com>
The gcc option "-mbacktrace" will push fp(r8),lr into stack and we could unwind the stack with: fp = *fp lr = (unsigned int *)fp[1] Signed-off-by: Guo Ren <ren_guo@c-sky.com>
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 <ren_guo@c-sky.com>
All architectures except for sparc64 use the dma-direct code in some form, and even for sparc64 we had the discussion of a direct mapping mode a while ago. In preparation for directly calling the direct mapping code don't bother having it optionally but always build the code in. This is a minor hardship for some powerpc and arm configs that don't pull it in yet (although they should in a relase ot two), and sparc64 which currently doesn't need it at all, but it will reduce the ifdef mess we'd otherwise need significantly. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Tested-by: Jesper Dangaard Brouer <brouer@redhat.com> Tested-by: Tony Luck <tony.luck@intel.com>
The csky code was largely copied from arm/arm64, so switch to the generic arm64-based implementation instead. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Guo Ren <ren_guo@c-sky.com>
This option is gone past Linux 4.19. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Guo Ren <ren_guo@c-sky.com>
The dma remap code only makes sense for not cache coherent architectures (or possibly the corner case of highmem CMA allocations) and currently is only used by arm, arm64, csky and xtensa. Split it out into a separate file with a separate Kconfig symbol, which gets the right copyright notice given that this code was written by Laura Abbott working for Code Aurora at that point. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Laura Abbott <labbott@redhat.com> Reviewed-by: Robin Murphy <robin.murphy@arm.com>