Commit Graph

26 Commits

Author SHA1 Message Date
Guo Ren 1994cc49f1 csky: Select intc & timer drivers
Let arch help to select interrupt controller's and timer's drivers
instead of people using menuconfig to select. This help the mini system
boot up.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>
2019-07-19 14:21:36 +08:00
Thomas Gleixner ec8f24b7fa treewide: Add SPDX license identifier - Makefile/Kconfig
Add SPDX license identifiers to all Make/Kconfig files which:

 - Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

  GPL-2.0-only

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21 10:50:46 +02:00
Linus Torvalds ddab5337b2 DMA mapping updates for 5.2
- remove the already broken support for NULL dev arguments to the
    DMA API calls
  - Kconfig tidyups
 -----BEGIN PGP SIGNATURE-----
 
 iQI/BAABCgApFiEEgdbnc3r/njty3Iq9D55TZVIEUYMFAlzT00YLHGhjaEBsc3Qu
 ZGUACgkQD55TZVIEUYO66hAAx2kCUIh+K2gFB5uxHqZiG62UmRjkPzolxcR5/Jx9
 4Rz6NRAE+rp8v2fbBr2bveDx7cF5bm1L+pRyRsFMfwkm3a8dCHQ51ldIm5VFoI3e
 NiX6Zoxk02BCXP/Qk//aHeNW9dBmuiemiXzdPEhOvWvVzqTO5JZrECQpkHEkG+8A
 R/IWU15sr5xzw9Td/HVN9CRJri/qiTAuB9nSoP6BGjZeHkQjREJKNMGKDTvSzH4L
 tlyD1G7yEymQvLBqGGO64ztuav00l8sqjI3tn1mmwpw4VTajabeRHPnWh+7g9Od+
 sH1pRvIOTvEMc456fizufYIOedB5Ze344kgfrxhngRbBVXmMfShr8ZLzdIUGhGjY
 1cdGqIUOEKywiDf13KrHVkNU+lJtvjMCMxvV93mAYRLOIQg0Jf4T2kklgKyEhqrG
 rqFdbbtSBzmLjPyqc1FS0heDWmA+yJsKAumGcH4blJXCpsD1rHWGe0AJ34x+OHPT
 tw5l+P4zAH1eO1qHCtmxN9s0lXZv1VLcFkOrJH91LPvAhZsUCrdqDjyJpTUYaIao
 yzkiLbDwFO7SVoqzaVNlVZIJ/9LX0qfAnl2Atty+sAQomrQMoviNSzGbLSLQqhHN
 FbTIEBMxrxS49+3lfzHOS/lYPpJp6B31yotNM+6YpXmbRQZN5gjGNYBqhKD+7Rgn
 L0Y=
 =IdsP
 -----END PGP SIGNATURE-----

Merge tag 'dma-mapping-5.2' of git://git.infradead.org/users/hch/dma-mapping

Pull DMA mapping updates from Christoph Hellwig:

 - remove the already broken support for NULL dev arguments to the DMA
   API calls

 - Kconfig tidyups

* tag 'dma-mapping-5.2' of git://git.infradead.org/users/hch/dma-mapping:
  dma-mapping: add a Kconfig symbol to indicate arch_dma_prep_coherent presence
  dma-mapping: remove an unnecessary NULL check
  x86/dma: Remove the x86_dma_fallback_dev hack
  dma-mapping: remove leftover NULL device support
  arm: use a dummy struct device for ISA DMA use of the DMA API
  pxa3xx-gcu: pass struct device to dma_mmap_coherent
  gbefb: switch to managed version of the DMA allocator
  da8xx-fb: pass struct device to DMA API functions
  parport_ip32: pass struct device to DMA API functions
  dma: select GENERIC_ALLOCATOR for DMA_REMAP
2019-05-09 08:40:55 -07:00
Linus Torvalds ce45327ca0 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
 -----BEGIN PGP SIGNATURE-----
 
 iQJGBAABCAAwFiEE2KAv+isbWR/viAKHAXH1GYaIxXsFAlzReFYSHHJlbl9ndW9A
 Yy1za3kuY29tAAoJEAFx9RmGiMV71cwP/RQX7VHqH4Slak5myDlHCabzkzYJjU/a
 zy8RdFSfzjXkNWzz8zo68Ze+DqDBDLfRHftqikg7CpZF6nQo5vC0VfDtKJZ6x2bi
 8bzuTIb5q0eZEUJmJROjnT4At3mVr+sCZlrEshI0DIAbd1BT34LLF2hE06pbBlej
 kH9ngVJw2XpIFJE/S2Gs0ieftOuOEvXgwxFdXrEdfr2TFR+Z9UGd8imLL4LF/2Fu
 rbfxFDNUAAmm6CzIzDz7BMGlQAXdMGsQiQDa3YuJ/v4yg5EuqzDz+p1bwEGxGelB
 R0FYjOxfLB8PUkpigb3v1E21eUHbVQsWgvWdH0ksoJIFUboH0TRRmtsjQnbBaSkE
 DT5tJHTzqTIIawo+PuOlQ8to3i8L6oWE0MlNG354wjgwfus21v2mWwbXzWtnYsN+
 dv4VZ9NDwifrpGY6k9j+vVmqzQ2FYBtrX4R/oPBc3StYdPqKJHp2K87Y3UQVLqPH
 D7GxV6LHLy4RlpSbA4Zq6zZRQTQmgLFaVRXbnMuicy1QZyYzp8wagpYRh+XJVvg7
 rQr8EnP2B7G8N1JLrh3B46TxuZHOSQXXTsg3fbcIlv5at3vQ1xx6KU2InKLBvALU
 3ICsOnJ/UzID35zmTY0KSxzEL7u5LxJUYPd/YxKpfuN405jvnvnSCAYKm0fFuYnJ
 tFVd9uZc5W4q
 =oQ+E
 -----END PGP SIGNATURE-----

Merge tag 'csky-for-linus-5.2-rc1' of git://github.com/c-sky/csky-linux

Pull arch/csky updates from Guo Ren:

 - 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

* tag 'csky-for-linus-5.2-rc1' of git://github.com/c-sky/csky-linux:
  csky/syscall_trace: Fixup return processing flow
  csky: Fixup compile warning
  csky: Add support for perf registers sampling
  csky: add page fault perf event support
  csky: Use va_pa_offset instead of phys_offset
  csky: Support vmlinux bootup with MMU off
  csky: Add perf_arch_fetch_caller_regs support
  csky: Fixup wrong update_mmu_cache implementation
  csky: Support dynamic start physical address
  csky: Reconstruct signal processing
  csky: Use in_syscall & forget_syscall instead of r11_sig
  csky: Add non-uapi asm/ptrace.h namespace
  csky: mm/fault.c: Remove duplicate header
  csky: remove redundant generic-y
  csky: Update syscall_trace_enter/exit implementation
  csky: Add perf callchain support
  csky/ftrace: Add dynamic function tracer (include graph tracer)
  csky: Fixup vdsp&fpu issues in kernel
2019-05-08 11:41:08 -07:00
Christoph Hellwig 13bf5ced93 dma-mapping: add a Kconfig symbol to indicate arch_dma_prep_coherent presence
Add a Kconfig symbol that indicates an architecture provides a
arch_dma_prep_coherent implementation, and provide a stub otherwise.

This will allow the generic dma-iommu code to use it while still
allowing to be built for cache coherent architectures.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
2019-05-06 15:04:40 +02:00
Mao Han daac95e70f csky: Add support for perf registers sampling
This patch implements the perf registers sampling and validation API
for csky arch. The valid registers and their register ID are defined in
perf_regs.h. Perf tool can backtrace in userspace with unwind library
and the registers/user stack dump support.

Signed-off-by: Mao Han <han_mao@c-sky.com>
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
2019-04-22 13:44:57 +08:00
Guo Ren 2f7932b011 csky: Update syscall_trace_enter/exit implementation
Previous syscall_trace implementation couldn't support AUDITSYSCALL and
SYSCALL_TRACEPOINTS. Now we redesign it to support audit_syscall
and syscall_tracepoints just like other archs'.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Dmitry V. Levin <ldv@altlinux.org>
Cc: Arnd Bergmann <arnd@arndb.de>
2019-04-22 13:44:57 +08:00
Guo Ren 28bb030f93 csky/ftrace: Add dynamic function tracer (include graph tracer)
Support dynamic ftrace including dynamic graph tracer. Gcc-csky with -pg
will produce call site in every function prologue and we can use these
call site to hook trace function.

gcc with -pg origin call site:
	push	lr
	jbsr	_mcount
	nop32
	nop32

If the (callee - caller)'s offset is in range of bsr instruction, we'll
modify code with:
	push	lr
	bsr	_mcount
	nop32
	nop32
Else if the (callee - caller)'s offset is out of bsr instrunction, we'll
modify code with:
	push	lr
	movih	r26, ...
	ori	r26, ...
	jsr	r26

(r26 is reserved for jsr link reg in csky abiv2 spec.)

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
2019-04-22 13:44:57 +08:00
Waiman Long 390a0c62c2 locking/rwsem: Remove rwsem-spinlock.c & use rwsem-xadd.c for all archs
Currently, we have two different implementation of rwsem:

 1) CONFIG_RWSEM_GENERIC_SPINLOCK (rwsem-spinlock.c)
 2) CONFIG_RWSEM_XCHGADD_ALGORITHM (rwsem-xadd.c)

As we are going to use a single generic implementation for rwsem-xadd.c
and no architecture-specific code will be needed, there is no point
in keeping two different implementations of rwsem. In most cases, the
performance of rwsem-spinlock.c will be worse. It also doesn't get all
the performance tuning and optimizations that had been implemented in
rwsem-xadd.c over the years.

For simplication, we are going to remove rwsem-spinlock.c and make all
architectures use a single implementation of rwsem - rwsem-xadd.c.

All references to RWSEM_GENERIC_SPINLOCK and RWSEM_XCHGADD_ALGORITHM
in the code are removed.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-riscv@lists.infradead.org
Cc: linux-um@lists.infradead.org
Cc: linux-xtensa@linux-xtensa.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: nios2-dev@lists.rocketboards.org
Cc: openrisc@lists.librecores.org
Cc: uclinux-h8-devel@lists.sourceforge.jp
Link: https://lkml.kernel.org/r/20190322143008.21313-3-longman@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-04-03 14:50:52 +02:00
Linus Torvalds b7a7d1c1ec DMA mapping updates for 5.1
- add debugfs support for dumping dma-debug information (Corentin Labbe)
  - Kconfig cleanups (Andy Shevchenko and me)
  - debugfs cleanups (Greg Kroah-Hartman)
  - improve dma_map_resource and use it in the media code
  - arch_setup_dma_ops / arch_teardown_dma_ops cleanups
  - various small cleanups and improvements for the per-device coherent
    allocator
  - make the DMA mask an upper bound and don't fail "too large" dma mask
    in the remaning two architectures - this will allow big driver
    cleanups in the following merge windows
 -----BEGIN PGP SIGNATURE-----
 
 iQI/BAABCgApFiEEgdbnc3r/njty3Iq9D55TZVIEUYMFAlyCKUgLHGhjaEBsc3Qu
 ZGUACgkQD55TZVIEUYP1vA//WNK5cxQVGZZsmsmkcNe3sCaJCZD4MpVpq/D+l87t
 3j1C1qmduOPyI1m061niYk7j4B4DeyeLs+XOeUsl5Yz+FqVvDICuNHXXJQSUr3Ao
 JbMfBis8Ne65Eyz0xxBltCWM7WiE6fdo7AGoR4Bzj3+f4xGOOazkRy4R6r67bU6x
 v3R5dTvfbSlvvKhn+j8ksAEYb+WPUmr6Z2dnlF0mShnOCpZVy0wd0M1gtEFKrVHx
 zKz9/va4/7yEcpdVqNtSDlHIsSZcFE3ZfTRWq6ZtBoRN+gNwrI0YylY7HtCfJWZG
 IxMiuQ+8SHGE8+NI2d56bs4MsHbqPBRSuadJNuZaTzdxs6FDTEnlCDeXwGF1cHf2
 qhVMfn17V4TZNT4NAd2wHa60cjTMoqraWeS06/b2tyXTF0uxyWj0BCjaHNJa+Ayc
 KCulq1n2LmTDiOGnZJT7Oui6PO5etOHAmvgMQumBNkzQJbPGvuiYGgsciYAMSmuy
 NccIrghQzR9BlG6U1srzTiGQJnpm38x1hWphtU6gQPwz5iKt3FBAfEWCic8U81QE
 JKSwoYv/5ChO+sy9880t/FLO8hn/7L55IOdZEfGkQ22gFzf3W5f9v2jFQc8XN2BO
 Fc6EjWERrmTzUi0f1Ooj3VPRtWuZq86KqlKByy6iZ5eXwxpGE1M0HZVoHYCW+aDd
 MYc=
 =nAMI
 -----END PGP SIGNATURE-----

Merge tag 'dma-mapping-5.1' of git://git.infradead.org/users/hch/dma-mapping

Pull DMA mapping updates from Christoph Hellwig:

 - add debugfs support for dumping dma-debug information (Corentin
   Labbe)

 - Kconfig cleanups (Andy Shevchenko and me)

 - debugfs cleanups (Greg Kroah-Hartman)

 - improve dma_map_resource and use it in the media code

 - arch_setup_dma_ops / arch_teardown_dma_ops cleanups

 - various small cleanups and improvements for the per-device coherent
   allocator

 - make the DMA mask an upper bound and don't fail "too large" dma mask
   in the remaning two architectures - this will allow big driver
   cleanups in the following merge windows

* tag 'dma-mapping-5.1' of git://git.infradead.org/users/hch/dma-mapping: (21 commits)
  Documentation/DMA-API-HOWTO: update dma_mask sections
  sparc64/pci_sun4v: allow large DMA masks
  sparc64/iommu: allow large DMA masks
  sparc64: refactor the ali DMA quirk
  ccio: allow large DMA masks
  dma-mapping: remove the DMA_MEMORY_EXCLUSIVE flag
  dma-mapping: remove dma_mark_declared_memory_occupied
  dma-mapping: move CONFIG_DMA_CMA to kernel/dma/Kconfig
  dma-mapping: improve selection of dma_declare_coherent availability
  dma-mapping: remove an incorrect __iommem annotation
  of: select OF_RESERVED_MEM automatically
  device.h: dma_mem is only needed for HAVE_GENERIC_DMA_COHERENT
  mfd/sm501: depend on HAS_DMA
  dma-mapping: add a kconfig symbol for arch_teardown_dma_ops availability
  dma-mapping: add a kconfig symbol for arch_setup_dma_ops availability
  dma-mapping: move debug configuration options to kernel/dma
  dma-debug: add dumping facility via debugfs
  dma: debug: no need to check return value of debugfs_create functions
  videobuf2: replace a layering violation with dma_map_resource
  dma-mapping: don't BUG when calling dma_map_resource on RAM
  ...
2019-03-10 11:54:48 -07:00
Christoph Hellwig ff4c25f26a dma-mapping: improve selection of dma_declare_coherent availability
This API is primarily used through DT entries, but two architectures
and two drivers call it directly.  So instead of selecting the config
symbol for random architectures pull it in implicitly for the actual
users.  Also rename the Kconfig option to describe the feature better.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Paul Burton <paul.burton@mips.com> # MIPS
Acked-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-20 07:26:35 -07:00
Yury Norov 942fa985e9 32-bit userspace ABI: introduce ARCH_32BIT_OFF_T config option
All new 32-bit architectures should have 64-bit userspace off_t type, but
existing architectures has 32-bit ones.

To enforce the rule, new config option is added to arch/Kconfig that defaults
ARCH_32BIT_OFF_T to be disabled for new 32-bit architectures. All existing
32-bit architectures enable it explicitly.

New option affects force_o_largefile() behaviour. Namely, if userspace
off_t is 64-bits long, we have no reason to reject user to open big files.

Note that even if architectures has only 64-bit off_t in the kernel
(arc, c6x, h8300, hexagon, nios2, openrisc, and unicore32),
a libc may use 32-bit off_t, and therefore want to limit the file size
to 4GB unless specified differently in the open flags.

Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Yury Norov <ynorov@marvell.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-02-19 10:10:05 +01:00
Christoph Hellwig 34e04eedd1 of: select OF_RESERVED_MEM automatically
The OF_RESERVED_MEM can be used if we have either CMA or the generic
declare coherent code built and we support the early flattened DT.

So don't bother making it a user visible options that is selected
by most configs that fit the above category, but just select it when
the requirements are met.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Rob Herring <robh@kernel.org>
2019-02-13 19:19:47 +01:00
Linus Torvalds 9ee3b3f4a5 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.
 -----BEGIN PGP SIGNATURE-----
 
 iQJGBAABCAAwFiEE2KAv+isbWR/viAKHAXH1GYaIxXsFAlwtr/MSHHJlbl9ndW9A
 Yy1za3kuY29tAAoJEAFx9RmGiMV7WD0P/2neOLEqPA9f0E3pmzdRiKYQa9D932BD
 pl9zhQalexVDz8aEYA0ClsgQwg97OTZFMCf3TPm2aOotTHk5QHforee3A4G5IKZ5
 a7oDURapg8DmQpyxjJ2TLv+kfR9OihxpGHTuaj3rAK38Z9+TKcvspRCgISYf4Oyz
 RJPXc8cpM2j/+uLly00h0Rxkl9rHcCukLYFxghZ4oyGamoFvz43BBkk0BR2A/3h8
 r3f1zyefUSkY21PgLlIspa9Kg5QEuDFSQTdAAUkJyRmKG4n6gNABuZchKlLaopXp
 2R1sm/FgoLS75p65uLRves4zMlzxoP6+suJoKIKLqBMJ4KeUTH3jQ9fFGaUyNI+b
 rV8AzmbAh3hAbs6QcCjDrsbo4PLb/r5+Nuzt2fu2VAiXIB+18EUOtqLse40OrySR
 SvdypMd4H0q9KD+NoKXPYjYM2ja1Yyedg3BChMeP6AYUsqOkOIg2Z0UebXLLabJ7
 lp93ObMS2iAfKat9LGk2jz/LkRzMha4VqMgiQ4QubgzYXD+ySBB5yhzWqIBRDJ+Z
 hZCZEyc6vzAZ5yrh1xiQKUqilpTupmLp9nJOHQ8rUEjjCnJBiZpj5itZmNZwiH1M
 XZh1XCFCzt37a+vfGy3viG9xtVuMEbyRMMbcyxans75Xh6U36C6/GoDSmb1rZcf2
 u1yQRWUqXLBy
 =YVII
 -----END PGP SIGNATURE-----

Merge tag 'csky-for-linus-4.21' of git://github.com/c-sky/csky-linux

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
2019-01-05 09:50:07 -08:00
Guo Ren f50fd2d852 csky: Add perf support for C-SKY
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>
2019-01-02 22:17:11 +08:00
Guo Ren d7950be145 csky: ftrace call graph supported.
With csky-gcc -pg -mbacktrace, ftrace call graph supported.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
2018-12-31 23:17:23 +08:00
Guo Ren 230c77a5e9 csky: basic ftrace supported
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>
2018-12-31 23:16:46 +08:00
Guo Ren 0ea2dc7cd6 csky: stacktrace supported.
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>
2018-12-31 23:12:22 +08:00
Guo Ren 859e5f45cb csky: CPU-hotplug supported for SMP
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>
2018-12-31 23:03:53 +08:00
Christoph Hellwig 3731c3d477 dma-mapping: always build the direct mapping code
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>
2018-12-13 21:06:11 +01:00
Christoph Hellwig f04b951f6c csky: use the generic remapping dma alloc implementation
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>
2018-12-01 18:07:16 +01:00
Christoph Hellwig de90d7c428 csky: don't select DMA_NONCOHERENT_OPS
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>
2018-12-01 18:07:15 +01:00
Christoph Hellwig f0edfea8ef dma-mapping: move the remap helpers to a separate file
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>
2018-12-01 17:58:34 +01:00
Mike Rapoport aca52c3983 mm: remove CONFIG_HAVE_MEMBLOCK
All architecures use memblock for early memory management. There is no need
for the CONFIG_HAVE_MEMBLOCK configuration option.

[rppt@linux.vnet.ibm.com: of/fdt: fixup #ifdefs]
  Link: http://lkml.kernel.org/r/20180919103457.GA20545@rapoport-lnx
[rppt@linux.vnet.ibm.com: csky: fixups after bootmem removal]
  Link: http://lkml.kernel.org/r/20180926112744.GC4628@rapoport-lnx
[rppt@linux.vnet.ibm.com: remove stale #else and the code it protects]
  Link: http://lkml.kernel.org/r/1538067825-24835-1-git-send-email-rppt@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1536927045-23536-4-git-send-email-rppt@linux.vnet.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Tested-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Serge Semin <fancer.lancer@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-10-31 08:54:15 -07:00
Mike Rapoport b4a991ec58 mm: remove CONFIG_NO_BOOTMEM
All achitectures select NO_BOOTMEM which essentially becomes 'Y' for any
kernel configuration and therefore it can be removed.

[alexander.h.duyck@linux.intel.com: remove now defunct NO_BOOTMEM from depends list for deferred init]
  Link: http://lkml.kernel.org/r/20180925201814.3576.15105.stgit@localhost.localdomain
Link: http://lkml.kernel.org/r/1536927045-23536-3-git-send-email-rppt@linux.vnet.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Serge Semin <fancer.lancer@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-10-31 08:54:14 -07:00
Guo Ren c32e64e852 csky: Build infrastructure
This patch adds Makefile, Kconfig for build infrastructure.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-10-25 23:36:19 +08:00