arch/csky patches for 5.3-rc1

This round of csky subsystem gives two features (ASID algorithm update,
Perf pmu record support) and some fixups.

Feature:
 - csky: Revert mmu ASID mechanism
 - csky: Add new asid lib code from arm
 - csky: Use generic asid algorithm to implement switch_mm
 - csky: Improve tlb operation with help of asid

 - csky: Init pmu as a device
 - csky: Add count-width property for csky pmu
 - csky: Add pmu interrupt support
 - csky: Fix perf record in kernel/user space
 - dt-bindings: csky: Add csky PMU bindings

Fixup:
 - csky: Fixup no panic in kernel for some traps
 - csky: Fixup some error count in 810 & 860.
 - csky: Fixup abiv1 memset error

CI-Tested: https://gitlab.com/c-sky/buildroot/pipelines/68656845

arch/csky fixup for 5.2

Only 1 fixup patch for rt_sigframe in signal.c

arch/csky perf unwind libdw patch for v5.2-rc1

Here is another patch for arch/csky v5.2-rc1:

 - Add support for perf unwind-libdw

arch/csky patches for 5.2-rc1

Here are the patches which made on 5.1-rc6 and all are tested in our
buildroot gitlab CI:
https://gitlab.com/c-sky/buildroot/pipelines/57892579

 - Fixup vdsp&fpu issues in kernel
 - Add dynamic function tracer
 - Use in_syscall & forget_syscall instead of r11_sig
 - Reconstruct signal processing
 - Support dynamic start physical address
 - Fixup wrong update_mmu_cache implementation
 - Support vmlinux bootup with MMU off
 - Use va_pa_offset instead of phys_offset
 - Fixup syscall_trace return processing flow
 - Add perf callchain support
 - Add perf_arch_fetch_caller_regs support
 - Add page fault perf event support
 - Add support for perf registers sampling

arch/csky patches for 5.1-rc7

Here are the patches which made on 5.1-rc6 and all are tested in our
buildroot gitlab CI:
https://gitlab.com/c-sky/buildroot/pipelines/57892579

 - Fixup vdsp&fpu issues in kernel
 - Add dynamic function tracer
 - Use in_syscall & forget_syscall instead of r11_sig
 - Reconstruct signal processing
 - Support dynamic start physical address
 - Fixup wrong update_mmu_cache implementation
 - Support vmlinux bootup with MMU off
 - Use va_pa_offset instead of phys_offset
 - Fixup syscall_trace return processing flow
 - Add perf callchain support
 - Add perf_arch_fetch_caller_regs support
 - Add page fault perf event support
 - Add support for perf registers sampling

arch/csky patches for 5.0-rc6

Here is some fixup patches for 5.0-rc6:

Guo Ren (5):
      csky: Fixup _PAGE_GLOBAL bit for 610 tlb entry
      csky: Fixup wrong pt_regs size
      csky: coding convention: Use task_stack_page
      csky: Fixup io-range page attribute for mmap("/dev/mem")
      csky: Fixup dead loop in show_stack

arch/csky patches for 5.0-rc1

Here is some fixup patches for 5.0-rc1:

 - fixup compile error with pte_alloc
 - fixup handle_irq_perbit break irq flow
 - fixup CACHEV1 store instruction fast retire
 - fixup module relocation error with 807 & 860
 - add csky kernel features

arch/csky patches for 4.21-rc1

Here is the arch/csky patch set for the 4.21-rc1 merge window.
Contianed in here is three features (cpu_hotplug, basic ftrace,
basic perf) and some bugfixes.

C-SKY fixes/update for 4.20-rc6

 - Bugfix tlb_get_pgd error.

 - Update MAINTAINERS file for C-SKY drivers.

csky: dtb Kbuild fixup patches for linux-4.20-rc1

These patches are complementary to "C-SKY(csky) Port for Linux 4.20" and
fixup dtb Kbuild to follow the new Devicetree dtb build rules.

Link: https://lore.kernel.org/lkml/CABGGisxiWaQn9qDqpfxEWcckkGJfMzFvSPGvuhQK7oB404-6DQ@mail.gmail.com/
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

This tag contains the Linux port for C-SKY(csky) based on linux-4.19
Release, which has been through 10 rounds of review on mailing list.

We almost got the Acked-by/Reviewed-by of all patches except "Process
management and Signal", but all've been tested.

Here is the LTP-20180118 test report:
-----------------------------------------------
Total Tests: 1298
Total Skipped Tests: 281
Total Failures: 10
Kernel Version: 4.19.0+
Machine Architecture: csky
Hostname: buildroot
-----------------------------------------------

This patchset adds architecture support to Linux for C-SKY's 32-bit embedded

There are two ABI versions with several CPU cores in this patchset:
  ABIv1: 610 (16-bit instruction, 32-bit data path, VIPT Cache ...)
  ABIv2: 807 810 860 (16/32-bit variable length instruction, PIPT Cache,
	 SMP ...)

More information: http://en.c-sky.com
The development repo: https://github.com/c-sky/csky-linux
ABI Documentation: https://github.com/c-sky/csky-doc

Here is the pre-built cross compiler for fast test from our CI:
https://gitlab.com/c-sky/buildroot/-/jobs/101608095/artifacts/file/output/images/csky_toolchain_qemu_csky_ck807f_4.18_glibc_defconfig_482b221e52908be1c9b2ccb444255e1562bb7025.tar.xz

We use buildroot as our CI-test enviornment. "LTP, Lmbench ..."
will be tested for every commit. See here for more details:
https://gitlab.com/c-sky/buildroot/pipelines

We'll continouslly improve csky subsystem in future.

Changes in v10:
 - Remove duplicated headers in asm/Kbuild and uapi/asm/Kbuild.
 - Change to (__NR_arch_specific_syscall + 1) in unistd.h.
 - Drop dword access for get_user_size patch.
 - Involve the interrupt controller drivers after got Reviewed-by.

Changes in v9:
 - Remove unused code in smp.c and use per_cpu for ipi_data.
 - Fixup r15 register access in abiv1/alignment.c.
 - Improve the changelog comment in commit-msg.

Changes in v8:
 - Pass make allmodconfig.
 - Implement abiv1 get_user_dword().
 - Remove set_irq_mapping() used by driver in smp.c.

Changes in v7:
 - Use checkpatch.pl to check all patches and fixup as possible.
 - Remove github.com/c-sky print in bootup.
 - Give a return in DMA_ATTR_NON_CONSISTENT in csky_dma_alloc_atomic().
 - Remove the NSIGXXX in fpu.c and use force_sig_fault() in fpu.c.
 - Remove irq.h and add it in asm/Kbuild.
 - Use byteswap helpers in abiv1/bswapXi.c.
 - Fixup arch_sync_dma() only with one page problem.

Changes in v6:
 - use asm-generic/bitops/atomic.h for all in asm/bitops.h
 - fix flush_cache_range and tlb_start_vma
 - fix compile error with include linux/bug.h in cmpxchg.h
 - improve the comment

Changes in v5:
 - remove redundant smp_mb operations in spinlock.h
 - add commit message for dt-bindings docs
 - add CPUHP_AP_CSKY_TIMER_STARTING in hotplug.h for csky_mptimer
 - add COMPILE_TEST for timer-gx6605s Kconfig
 - seperate csky two interrupt controllers with 2 patches
 - add MAINTAINERS patch for csky
 - move IPI_IRQ into csky_mptimer, fixup irq_mapping problem
 - coding convension

Changes in v4:
 - cleanup defconfig
 - use ksys_ in syscall.c
 - remove wrong comment in vdso.c
 - Use GENERIC_IRQ_MULTI_HANDLER
 - optimize the memset.c
 - fixup dts warnings
 - remove big-endian in byteorder.h

Changes in v3:
dc560f1 csky: change to EM_CSKY 252 for elf.h
2ac3ddf csky: remove gx6605s.dts
af00b8c csky: add defconfig and qemu.dts
6c87efb csky: remove the deprecate name.
f6dda39 csky: add dt-bindings doc.
d9f02a8 csky: remove KERNEL_VERSION in upstream branch
7bd663c csky: Use kernel/dma/noncoherent.c
1544c09 csky: bugfix emmc hang up LINS-976
e963271 csky: cleanup include/asm/Kbuild
cd267ba csky: remove CSKY_DEBUG_INFO
78950da csky: remove dcache invalid.
13fe51d csky: remove csum_ipv6_magic(), use generic one.
a7372db csky: bugfix CK810 access twice error.
1bb7c69 csky: bugfix add gcc asm memory for barrier.
5ea3257 csky: add -msoft-float instead of -mfloat-abi=soft.
38b037d csky: bugfix losing cache flush range.
ab5e8c4 csky: Add ticket-spinlock and qrwlock support.
c9aaec5 csky: rename cskyksyms.c to libgcc_ksyms.c
28c5e48 csky: avoid the MB on failure: trylock
f929c97 csky: bugfix idly4 may cause exception.
09dc496 csky: Use GENERIC_ASHLDI3/ASHRDI3 etc
6ecc99d csky: optimize smp boot code.
16f50df csky: asm/bug.h simple implement.
0ba532a csky: csky asm/atomic.h added.
df66947 csky: asm/compat.h added
275a06f csky: String operations optimization
4c021dd csky: ck860 SMP memory barrier optimize
fc39c66 csky: Add wait/doze/stop
d005144 csky: add GENERIC_ALLOCATOR
4a10074 csky: bugfix cma failed for highmem.
9f2ca70 csky: CMA supported :)
53791f4 csky: optimize csky_dma_alloc_nonatomic
974676e csky: optimize the cpuinfo printf.
2538669 csky: bugfix make headers_install error.
1158d0c csky: prevent hard-float and vdsp instructions.
dc3c856 csky: increase Normal Memory to 1GB
6ee5932 csky: bugfix qemu mmu couldn't support 0xffffe000
1d7dfb8 csky: csky_dma_alloc_atomic added.
caf6610 csky: restruct the fixmap memory layout.
5a17eaa csky: use -Wa,-mcpu=ckxxxfv to the as.
4d51829 csky: use Kconfig.hz.
f3f88fa csky: BUGFIX add -mcpu=ck860f support
6192fd1 csky: support ck860 fpu.
7aa5e01 csky: BUGFIX add smp_mb before ldex.
15758e2 csky: BUGFIX tlbi couldn't handle ASID in another CPU core.
d69640d csky: enable tlbi.vas to flush one tlb entry

Changes in v2:
a29bfc8 csky: add pre_mmu_init, move misc mmu setup to mm/init.c
4eab702 csky: no need kmap for !VM_EXEC.
6770eec csky: Use TEE as the name of CPU Trusted Execution Enviornment.
a56c8c7 csky: update the cache flush api.
1a48a95 csky: add C-SKY Trust Zone.
b7a0a44 csky: use CONFIG_RAM_BASE as the same in memory of dts.
15adf81 csky: remove unused code.
35c0d97 csky: bugfix lost a cacheline flush when start isn't cacheline-aligned.
4e82c8d csky: use tlbi.alls for ck860 smp temporary.
ae7149e csky: bugfix use kmap_atomic() to prevent no mapped addr.
5538795 csky: bugfix user access in kernel space.
a7aa591 csky: add 16bit user space bkpt.
0de70ec csky: add sync.is for cmpxchg in SMP.
c5c08a1 csky: seperate sync.is and sync for SMP and Non-SMP.
dbbf4dc csky: use sync.is for ck860 mb().
f33f8da csky: rewrite the alignment implement.
68152c7 csky: bugfix alignment pt_regs error.
d618d43 csky: support set_affinity for irq balance in SMP
ebf86c9 csky: bugfix compile error without CONFIG_SMP.
8537eea csky: remove debug code.
4ebc051 csky: bugfix compile error with linux-4.9.56
75a938e csky: C-SKY SMP supported.
0eebc07 csky: use internal function for map_sg.
3d29751 csky: bugfix can't support highmem
b545d2a csky: bugfix r26 is the link reg for jsri_to_jsr.
9e3313a csky: bugfix sync tls for abiv1 in ptrace.
587a0d2 csky: use __NR_rt_sigreturn in asm-generic.
f562b46 csky: bugfix gpr_set & fpr_set
f57266f csky: bugfix fpu_fpe_helper excute mtcr mfcr.
c676669 csky: bugfix ave is default enable on reset.
d40d34d csky: remove unused sc_mask in sigcontext.h.
274b7a2 csky: redesign the signal's api
7501771 csky: bugfix forget restore usp.
923e2ca csky: re-struct the pt_regs for regset.
2a1e499 csky: fixup config.
ada81ec csky: bugfix abiv1 compile error.
e34acb9 csky: bugfix abiv1 couldn't support -mno-stack-size.
ec53560 csky: change irq map, reserve soft_irq&private_irq space.
c7576f7 csky: bugfix modpost warning with -mno-stack-size
c8ff9d4 csky: support csky mp timer alpha version.
deabaaf csky: update .gitignore.
574815c csky: bugfix compile error with abiv1 in 4.15
0b426a7 csky: bugfix format of cpu verion id.
083435f csky: irq-csky-v2 alpha init.
21209e5 csky: add .gitignore
73e19b4 csky: remove FMFS_FPU_REGS/FMTS_FPU_REGS
07e8fac csky: add fpu regset in ptrace.c
cac779d csky: add CSKY_VECIRQ_LEGENCY for SOC bug.
54bab1d csky: move usp into pt_regs.
b167422 csky: support regset for ptrace.
a098d4c csky: remove ARCH_WANT_IPC_PARSE_VERSION
fe61a84 csky: add timer-of support.
27702e2 csky: bugfix boot error.
ebe3edb csky: bugfix gx6605s boot failed  - add __HEAD to head.section for head.S  - move INIT_SECTION together to fix compile warning.
7138cae csky: coding convension for timer-nationalchip.c
fa7f9bb csky: use ffs instead of fls.
ddc9e81 csky: change to generic irq chip for irq-csky.c
e9be8b9 irqchip: add generic irq chip for irq-nationalchip
2ee83fe csky: add set_handle_irq(), ref from openrisc & arm.
74181d6 csky: use irq_domain_add_linear instead of leagcy.
fa45ae4 csky: bugfix setup stroge order for uncached.
eb8030f csky: add HIGHMEM config in Kconfig
4f983d4 csky: remove "default n" in Kconfig
2467575 csky: use asm-generic/signal.h
77438e5 csky: coding conventions for irq.c
2e4a2b4 csky: optimize the cache flush ops.
96e1c58 csky: add CONFIG_CPU_ASID_BITS.
9339666 csky: add cprcr() cpwcr() for abiv1
ff05be4 csky: add THREAD_SHIFT define in asm/page.h
52ab022 csky: add mfcr() mtcr() in asm/reg_ops.h
bdcd8f3 csky: revert back Kconfig select.
590c7e6 csky: bugfix compile error with CONFIG_AUDIT
1989292 csky: revert some back with cleanup unistd.h
f1454fe csky: cleanup unistd.h
5d2985f csky: cleanup Kconfig and Makefile.
423d97e csky: cancel subdirectories
cae2af4 csky: use asm-generic/fcntl.h

tag for v4.8.4_20161104