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2018-09-05nds32: linker script: GCOV kernel may refers data in __exitGreentime Hu
This patch is used to fix nds32 allmodconfig/allyesconfig build error because GCOV kernel embeds counters in the kernel for each line and a part of that embed in __exit text. So we need to keep the EXIT_TEXT and EXIT_DATA if CONFIG_GCOV_KERNEL=y. Link: https://lkml.org/lkml/2018/9/1/125 Signed-off-by: Greentime Hu <greentime@andestech.com> Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
2018-09-04nds32: fix build error because of wrong semicolonGreentime Hu
It shall be removed in the define usage. We shall not put a semicolon there. /kisskb/src/arch/nds32/include/asm/elf.h:126:29: error: expected '}' before ';' token #define ELF_DATA ELFDATA2LSB; ^ /kisskb/src/fs/proc/kcore.c:318:17: note: in expansion of macro 'ELF_DATA' [EI_DATA] = ELF_DATA, ^~~~~~~~ /kisskb/src/fs/proc/kcore.c:312:15: note: to match this '{' .e_ident = { ^ /kisskb/src/scripts/Makefile.build:307: recipe for target 'fs/proc/kcore.o' failed Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32: Fix a kernel panic issue because of wrong frame pointer access.Greentime Hu
It can make sure that trace_hardirqs_off/trace_hardirqs_on can get a correct return address by frame pointer through __builtin_return_address() in this fix. Unable to handle kernel paging request at virtual address fffffffc pgd = 3c42e9cf [fffffffc] *pgd=02a9c000 Internal error: Oops: 1 [#1] Modules linked in: CPU: 0 PC is at trace_hardirqs_off+0x78/0xec LP is at common_exception_handler+0xda/0xf4 pc : [<b23ea5a4>] lp : [<b2352eba>] Tainted: G W sp : ada60ab0 fp : efcaff48 gp : 3a020490 r25: efcb0000 r24: 00000000 r23: 00000000 r22: 00000000 r21: 00000000 r20: 000700c1 r19: 000700ca r18: 3a21b018 r17: 00000001 r16: 00000002 r15: 00000001 r14: 0000002a r13: 3a00a804 r12: ada60ab0 r11: 3a113af8 r10: 3a01c530 r9 : 3a124404 r8 : 00120f9c r7 : b2352eba r6 : 00000000 r5 : 3a126b58 r4 : 00000000 r3 : 3a1726a8 r2 : b2921000 r1 : 00000000 r0 : 00000000 IRQs off Segment user Process init (pid: 1, stack limit = 0x069d7f15) Stack: (0xada60ab0 to 0xada61000) Stack: 0aa0: 00000000 00000003 3a110000 0011f000 Stack: 0ac0: 00000005 00000000 00000000 00000000 ada60b10 3a01fe68 ada60b0c ada60b08 Stack: 0ae0: 00000000 ada60ab8 ada60b30 3a020550 00000000 00000001 3a11c2f8 3a01c6e8 Stack: 0b00: 3a01cb80 fffffba8 3a113af8 3a21b018 3a122c28 00003ec4 00000165 00000000 Stack: 0b20: 3a126aec 0000006c 00000000 00000001 3a01fe68 00000000 00000003 00000000 Stack: 0b40: 00000001 000003f8 3a020930 3a01c530 00000008 ada60c18 3a020490 3a003120 Stack: 0b60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Stack: 0b80: 00000000 00000000 00000000 00000000 ffff8000 00000000 00000000 00000000 Stack: 0ba0: 00000000 00000001 3a020550 00000000 3a01d020 00000000 fffff000 fffff000 Stack: 0bc0: 00000000 00000000 00000000 00000000 ada60f2c 00000000 00000001 00000000 Stack: 0be0: 00000000 00000000 3a01fe68 fffffab0 00008034 00000008 3a0010cc 3a01fe68 Stack: 0c00: 00000000 00000000 00000001 ada60c88 3a020490 3a0139d4 0009dc6f 00000000 Stack: 0c20: 00000000 00000000 ada60fce fffff000 00000000 0000ebe0 3a020038 3a020550 Stack: 0c40: ada60f20 ada60c90 3a0007f0 3a0002a8 ada60c8c 00000000 00000000 ada60c88 Stack: 0c60: 3a020490 3a004570 00000000 00000000 ada60f20 3a0007f0 3a000000 00000000 Stack: 0c80: 3a020490 3a004850 00000000 3a013f24 3a000000 00000000 3a01ff44 00000000 Stack: 0ca0: 00000000 00000000 00000000 00000000 00000000 00000000 3a01ff84 3a01ff7c Stack: 0cc0: 3a01ff4c 3a01ff5c 3a01ff64 3a01ff9c 3a01ffa4 3a01ffac 3a01ff6c 3a01ff74 Stack: 0ce0: 00000000 00000000 3a01ff44 00000000 00000000 00000000 00000000 00000000 Stack: 0d00: 3a01ff8c 00000000 00000000 3a01ff94 00000000 00000000 00000000 00000000 Stack: 0d20: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Stack: 0d40: 3a01ffbc 3a01ffb4 00000000 00000000 00000000 00000000 00000000 00000000 Stack: 0d60: 00000000 00000000 00000000 00000000 00000000 3a01ffc4 00000000 00000000 Stack: 0d80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Stack: 0da0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Stack: 0dc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 3a01ff54 Stack: 0de0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Stack: 0e00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Stack: 0e20: 00000000 00000004 00000000 00000000 00000000 00000000 00000000 00000000 Stack: 0e40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Stack: 0e60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Stack: 0e80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Stack: 0ea0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Stack: 0ec0: 00000000 00000000 00000000 00000000 ffffffff 00000000 00000000 00000000 Stack: 0ee0: 00000000 00000000 00000000 00000000 ada60f20 00000000 00000000 00000000 Stack: 0f00: 00000000 00000000 00000000 00000000 00000000 00000000 3a020490 3a000b24 Stack: 0f20: 00000001 ada60fde 00000000 ada60fe4 ada60feb 00000000 00000021 3a038000 Stack: 0f40: 00000010 0009dc6f 00000006 00001000 00000011 00000064 00000003 00008034 Stack: 0f60: 00000004 00000020 00000005 00000008 00000007 3a000000 00000008 00000000 Stack: 0f80: 00000009 0000ebe0 0000000b 00000000 0000000c 00000000 0000000d 00000000 Stack: 0fa0: 0000000e 00000000 00000017 00000000 00000019 ada60fce 0000001f ada60ff6 Stack: 0fc0: 00000000 00000000 00000000 b5010000 fa839914 23b5dd89 a2aea540 692fc82e Stack: 0fe0: 0074696e 454d4f48 54002f3d 3d4d5245 756e696c 692f0078 0074696e 00000000 CPU: 0 PID: 1 Comm: init Tainted: G W 4.18.0-00015-g1888b64a2558-dirty #112 Hardware name: andestech,ae3xx (DT) Call Trace: [<b27a8e34>] dump_stack+0x2c/0x38 [<b2354874>] die+0x128/0x18c [<b2356f4c>] do_page_fault+0x3b8/0x4e0 [<b2352ed4>] ret_from_exception+0x0/0x10 [<b2352eba>] common_exception_handler+0xda/0xf4 Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32: Only print one page of stack when die to prevent printing too much ↵Greentime Hu
information. It may print too much information sometimes if the stack is wrong or too big. This patch can limit the debug information in a page of stack. Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32: Add macro definition for offset of lp register on stackZong Li
Use macro to replace the magic number. Signed-off-by: Zong Li <zong@andestech.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32: Remove the deprecated ABI implementationZong Li
We are not using NDS32 ABI 2 for now, just remove the preprocessor directives __NDS32_ABI_2. Signed-off-by: Zong Li <zong@andestech.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32/stack: Get real return address by using ftrace_graph_ret_addrZong Li
Function graph tracer has modified the return address to 'return_to_handler' on stack, and provide the 'ftrace_graph_ret_addr' to get the real return address. Signed-off-by: Zong Li <zong@andestech.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32/ftrace: Support dynamic function graph tracerZong Li
This patch contains the implementation of dynamic function graph tracer. Signed-off-by: Zong Li <zong@andestech.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32/ftrace: Support dynamic function tracerZong Li
This patch contains the implementation of dynamic function tracer. The mcount call is composed of three instructions, so there are three nop for enough placeholder. Signed-off-by: Zong Li <zong@andestech.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32/ftrace: Add RECORD_MCOUNT supportZong Li
Recognize NDS32 object files in recordmcount.pl. Signed-off-by: Zong Li <zong@andestech.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32/ftrace: Support static function graph tracerZong Li
This patch contains implementation of static function graph tracer. Signed-off-by: Zong Li <zong@andestech.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32/ftrace: Support static function tracerZong Li
This patch support the static function tracer. On nds32 ABI, we need to always push return address to stack for __builtin_return_address can work correctly, otherwise, it will get the wrong value of $lp at leaf function. Signed-off-by: Zong Li <zong@andestech.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32: Extract the checking and getting pointer to a macroZong Li
Signed-off-by: Zong Li <zong@andestech.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32: Clean up the coding styleZong Li
1. Adjust indentation. 2. Unify argument name of each macro. 3. Add space after comma in parameters list. 4. Add space after 'if' keyword. 5. Replace space by tab. 6. Change asm volatile to __asm__ __volatile__ Signed-off-by: Zong Li <zong@andestech.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32: Fix get_user/put_user macro expand pointer problemZong Li
The pointer argument of macro need to be taken out once first, and then use the new pointer in the macro body. In kernel/trace/trace.c, get_user(ch, ubuf++) causes the unexpected increment after expand the macro. Signed-off-by: Zong Li <zong@andestech.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32: Fix empty call traceZong Li
The compiler predefined macro 'NDS32_ABI_2' had been removed, it should use the '__NDS32_ABI_2' here. Signed-off-by: Zong Li <zong@andestech.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32: add NULL entry to the end of_device_id arrayYueHaibing
Make sure of_device_id tables are NULL terminated. Found by coccinelle spatch "misc/of_table.cocci" Signed-off-by: YueHaibing <yuehaibing@huawei.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-09-04nds32: fix logic for moduleGreentime Hu
This bug is report by Dan Carpenter. We shall use ~loc_mask instead of !loc_mask because we need to and(&) the bits of ~loc_mask. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Fixes: c9a4a8da6baa ("nds32: Loadable modules") Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-08-24kbuild: rename LDFLAGS to KBUILD_LDFLAGSMasahiro Yamada
Commit a0f97e06a43c ("kbuild: enable 'make CFLAGS=...' to add additional options to CC") renamed CFLAGS to KBUILD_CFLAGS. Commit 222d394d30e7 ("kbuild: enable 'make AFLAGS=...' to add additional options to AS") renamed AFLAGS to KBUILD_AFLAGS. Commit 06c5040cdb13 ("kbuild: enable 'make CPPFLAGS=...' to add additional options to CPP") renamed CPPFLAGS to KBUILD_CPPFLAGS. For some reason, LDFLAGS was not renamed. Using a well-known variable like LDFLAGS may result in accidental override of the variable. Kbuild generally uses KBUILD_ prefixed variables for the internally appended options, so here is one more conversion to sanitize the naming convention. I did not touch Makefiles under tools/ since the tools build system is a different world. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
2018-08-17mm: convert return type of handle_mm_fault() caller to vm_fault_tSouptick Joarder
Use new return type vm_fault_t for fault handler. For now, this is just documenting that the function returns a VM_FAULT value rather than an errno. Once all instances are converted, vm_fault_t will become a distinct type. Ref-> commit 1c8f422059ae ("mm: change return type to vm_fault_t") In this patch all the caller of handle_mm_fault() are changed to return vm_fault_t type. Link: http://lkml.kernel.org/r/20180617084810.GA6730@jordon-HP-15-Notebook-PC Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Tony Luck <tony.luck@intel.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Michal Simek <monstr@monstr.eu> Cc: James Hogan <jhogan@kernel.org> Cc: Ley Foon Tan <lftan@altera.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: David S. Miller <davem@davemloft.net> Cc: Richard Weinberger <richard@nod.at> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-08-15Merge tag 'kconfig-v4.19-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kconfig consolidation from Masahiro Yamada: "Consolidation of Kconfig files by Christoph Hellwig. Move the source statements of arch-independent Kconfig files instead of duplicating the includes in every arch/$(SRCARCH)/Kconfig" * tag 'kconfig-v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kconfig: add a Memory Management options" menu kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt kconfig: use a menu in arch/Kconfig to reduce clutter kconfig: include kernel/Kconfig.preempt from init/Kconfig Kconfig: consolidate the "Kernel hacking" menu kconfig: include common Kconfig files from top-level Kconfig kconfig: remove duplicate SWAP symbol defintions um: create a proper drivers Kconfig um: cleanup Kconfig files um: stop abusing KBUILD_KCONFIG
2018-08-02kconfig: include kernel/Kconfig.preempt from init/KconfigChristoph Hellwig
Almost all architectures include it. Add a ARCH_NO_PREEMPT symbol to disable preempt support for alpha, hexagon, non-coldfire m68k and user mode Linux. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-08-02Kconfig: consolidate the "Kernel hacking" menuChristoph Hellwig
Move the source of lib/Kconfig.debug and arch/$(ARCH)/Kconfig.debug to the top-level Kconfig. For two architectures that means moving their arch-specific symbols in that menu into a new arch Kconfig.debug file, and for a few more creating a dummy file so that we can include it unconditionally. Also move the actual 'Kernel hacking' menu to lib/Kconfig.debug, where it belongs. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-08-02kconfig: include common Kconfig files from top-level KconfigChristoph Hellwig
Instead of duplicating the source statements in every architecture just do it once in the toplevel Kconfig file. Note that with this the inclusion of arch/$(SRCARCH/Kconfig moves out of the top-level Kconfig into arch/Kconfig so that don't violate ordering constraits while keeping a sensible menu structure. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-07-05nds32: fix build error "relocation truncated to fit: R_NDS32_25_PCREL_RELA" whenGreentime Hu
make allyesconfig It will cause a linking error because the jump assembly code were using j, however it may be not enough to jump to the destination. We have to change it with pseudo instruction b. In that way, assembler will generate a set of safe assembly codes to make sure the destination is able to jump. Toolchain: https://mirrors.edge.kernel.org/pub/tools/crosstool/files/bin/x86_64/8.1.0/x86_64-gcc-8.1.0-nolibc-nds32le-linux.tar.gz Command: PATH=/NOBACKUP/atcsqa06/greentime/os/toolchain-kernel.org/gcc-8.1.0-nolibc/nds32le-linux/bin:$PATH ARCH=nds32 CROSS_COMPILE=nds32le-linux- make allyesconfig PATH=/NOBACKUP/atcsqa06/greentime/os/toolchain-kernel.org/gcc-8.1.0-nolibc/nds32le-linux/bin:$PATH ARCH=nds32 CROSS_COMPILE=nds32le-linux- make -j8 MODPOST vmlinux.o WARNING: EXPORT symbol "copy_page" [vmlinux] version generation failed, symbol will not be versioned. WARNING: EXPORT symbol "clear_page" [vmlinux] version generation failed, symbol will not be versioned. nds32le-linux-ld: kernel/futex.o:(.fixup+0x4): relocation truncated to fit: R_NDS32_25_PCREL_RELA against `.text' nds32le-linux-ld: kernel/futex.o:(.fixup+0xaa): relocation truncated to fit: R_NDS32_25_PCREL_RELA against `.text' nds32le-linux-ld: kernel/futex.o:(.fixup+0xb0): relocation truncated to fit: R_NDS32_25_PCREL_RELA against `.text' nds32le-linux-ld: kernel/futex.o:(.fixup+0xb6): relocation truncated to fit: R_NDS32_25_PCREL_RELA against `.text' nds32le-linux-ld: kernel/futex.o:(.fixup+0xbc): relocation truncated to fit: R_NDS32_25_PCREL_RELA against `.text' nds32le-linux-ld: kernel/futex.o:(.fixup+0xc4): relocation truncated to fit: R_NDS32_25_PCREL_RELA against `.text' Makefile:1010: recipe for target 'vmlinux' failed make: *** [vmlinux] Error 1 Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-07-03nds32: To simplify the implementation of update_mmu_cache()Greentime Hu
The checking code is done in kmap_atomic() so that we don't need to check it in update_mmu_cache() again. There is no need to implement it for cache aliasing or cache non-aliasing versions. We can just implement one version for both. Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-07-03nds32: Fix the dts pointer is not passed correctly issue.Greentime Hu
We found that the original implementation will only use the built-in dtb pointer instead of the pointer pass from bootloader. This bug is fixed by this patch. Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-07-03nds32: To implement these icache invalidation APIs since nds32 cores don't snoopGreentime Hu
data cache. This issue is found by Guo Ren. Based on the Documentation/core-api/cachetlb.rst and it says: "Any necessary cache flushing or other coherency operations that need to occur should happen here. If the processor's instruction cache does not snoop cpu stores, it is very likely that you will need to flush the instruction cache for copy_to_user_page()." "If the icache does not snoop stores then this routine(flush_icache_range) will need to flush it." Signed-off-by: Guo Ren <ren_guo@c-sky.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-06-19nds32: Fix build error caused by configuration flag renameGuenter Roeck
Fix build error on nds32 due to the merge of commit e3d5980568f ("lib: Rename compiler intrinsic selects to GENERIC_LIB_*") during the 4.18 merge window which renames Kconfig symbols. This had raced with commit aeaa7af744fa ("nds32: lib: To use generic lib instead of libgcc to prevent the symbol undefined issue.") merged late in the 4.17 cycle, which added selects to nds32 using the original Kconfig symbol names. When they came together in merge commit 763f96944c95 ("Merge tag 'mips_4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux") this resulted in the following build errors: nds32le-linux-ld: kernel/time/timekeeping.o: in function `timekeeping_init': timekeeping.c:(.init.text+0x140): undefined reference to `__ashldi3' nds32le-linux-ld: timekeeping.c:(.init.text+0x144): undefined reference to `__ashldi3' nds32le-linux-ld: timekeeping.c:(.init.text+0x17e): undefined reference to `__lshrdi3' nds32le-linux-ld: timekeeping.c:(.init.text+0x182): undefined reference to `__lshrdi3' nds32le-linux-ld: drivers/clocksource/mmio.o: in function `clocksource_mmio_init': mmio.c:(.init.text+0x54): undefined reference to `__lshrdi3' nds32le-linux-ld: mmio.c:(.init.text+0x58): undefined reference to `__lshrdi3' Rename all 6 selects in nds32 and adjust the ordering accordingly to be alphabetical. Fixes: 763f96944c95 ("Merge tag 'mips_4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux") Signed-off-by: Guenter Roeck <linux@roeck-us.net> [jhogan@kernel.org: Rename all 6 symbols, sort, update commit message] Signed-off-by: James Hogan <jhogan@kernel.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Vincent Chen <deanbo422@gmail.com> Cc: Matt Redfearn <matt.redfearn@mips.com> Cc: Palmer Dabbelt <palmer@sifive.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-06-19nds32: define __NDS32_E[BL]__ for sparseLuc Van Oostenryck
nds32 depends on the macros '__NDS32_E[BL]__' to correctly select or define endian-specific macros, structures or pieces of code. These macros are predefined by the compiler but sparse knows nothing about them and thus may pre-process files differently from what GCC would. Fix this by adding '-D__NDS32_E[BL]__' to CHECKFLAGS. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-06-04Merge branch 'timers-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timers and timekeeping updates from Thomas Gleixner: - Core infrastucture work for Y2038 to address the COMPAT interfaces: + Add a new Y2038 safe __kernel_timespec and use it in the core code + Introduce config switches which allow to control the various compat mechanisms + Use the new config switch in the posix timer code to control the 32bit compat syscall implementation. - Prevent bogus selection of CPU local clocksources which causes an endless reselection loop - Remove the extra kthread in the clocksource code which has no value and just adds another level of indirection - The usual bunch of trivial updates, cleanups and fixlets all over the place - More SPDX conversions * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits) clocksource/drivers/mxs_timer: Switch to SPDX identifier clocksource/drivers/timer-imx-tpm: Switch to SPDX identifier clocksource/drivers/timer-imx-gpt: Switch to SPDX identifier clocksource/drivers/timer-imx-gpt: Remove outdated file path clocksource/drivers/arc_timer: Add comments about locking while read GFRC clocksource/drivers/mips-gic-timer: Add pr_fmt and reword pr_* messages clocksource/drivers/sprd: Fix Kconfig dependency clocksource: Move inline keyword to the beginning of function declarations timer_list: Remove unused function pointer typedef timers: Adjust a kernel-doc comment tick: Prefer a lower rating device only if it's CPU local device clocksource: Remove kthread time: Change nanosleep to safe __kernel_* types time: Change types to new y2038 safe __kernel_* types time: Fix get_timespec64() for y2038 safe compat interfaces time: Add new y2038 safe __kernel_timespec posix-timers: Make compat syscalls depend on CONFIG_COMPAT_32BIT_TIME time: Introduce CONFIG_COMPAT_32BIT_TIME time: Introduce CONFIG_64BIT_TIME in architectures compat: Enable compat_get/put_timespec64 always ...
2018-06-04Merge branch 'siginfo-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull siginfo updates from Eric Biederman: "This set of changes close the known issues with setting si_code to an invalid value, and with not fully initializing struct siginfo. There remains work to do on nds32, arc, unicore32, powerpc, arm, arm64, ia64 and x86 to get the code that generates siginfo into a simpler and more maintainable state. Most of that work involves refactoring the signal handling code and thus careful code review. Also not included is the work to shrink the in kernel version of struct siginfo. That depends on getting the number of places that directly manipulate struct siginfo under control, as it requires the introduction of struct kernel_siginfo for the in kernel things. Overall this set of changes looks like it is making good progress, and with a little luck I will be wrapping up the siginfo work next development cycle" * 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (46 commits) signal/sh: Stop gcc warning about an impossible case in do_divide_error signal/mips: Report FPE_FLTUNK for undiagnosed floating point exceptions signal/um: More carefully relay signals in relay_signal. signal: Extend siginfo_layout with SIL_FAULT_{MCEERR|BNDERR|PKUERR} signal: Remove unncessary #ifdef SEGV_PKUERR in 32bit compat code signal/signalfd: Add support for SIGSYS signal/signalfd: Remove __put_user from signalfd_copyinfo signal/xtensa: Use force_sig_fault where appropriate signal/xtensa: Consistenly use SIGBUS in do_unaligned_user signal/um: Use force_sig_fault where appropriate signal/sparc: Use force_sig_fault where appropriate signal/sparc: Use send_sig_fault where appropriate signal/sh: Use force_sig_fault where appropriate signal/s390: Use force_sig_fault where appropriate signal/riscv: Replace do_trap_siginfo with force_sig_fault signal/riscv: Use force_sig_fault where appropriate signal/parisc: Use force_sig_fault where appropriate signal/parisc: Use force_sig_mceerr where appropriate signal/openrisc: Use force_sig_fault where appropriate signal/nios2: Use force_sig_fault where appropriate ...
2018-06-04Merge tag 'dma-mapping-4.18' of git://git.infradead.org/users/hch/dma-mappingLinus Torvalds
Pull dma-mapping updates from Christoph Hellwig: - replace the force_dma flag with a dma_configure bus method. (Nipun Gupta, although one patch is іncorrectly attributed to me due to a git rebase bug) - use GFP_DMA32 more agressively in dma-direct. (Takashi Iwai) - remove PCI_DMA_BUS_IS_PHYS and rely on the dma-mapping API to do the right thing for bounce buffering. - move dma-debug initialization to common code, and apply a few cleanups to the dma-debug code. - cleanup the Kconfig mess around swiotlb selection - swiotlb comment fixup (Yisheng Xie) - a trivial swiotlb fix. (Dan Carpenter) - support swiotlb on RISC-V. (based on a patch from Palmer Dabbelt) - add a new generic dma-noncoherent dma_map_ops implementation and use it for arc, c6x and nds32. - improve scatterlist validity checking in dma-debug. (Robin Murphy) - add a struct device quirk to limit the dma-mask to 32-bit due to bridge/system issues, and switch x86 to use it instead of a local hack for VIA bridges. - handle devices without a dma_mask more gracefully in the dma-direct code. * tag 'dma-mapping-4.18' of git://git.infradead.org/users/hch/dma-mapping: (48 commits) dma-direct: don't crash on device without dma_mask nds32: use generic dma_noncoherent_ops nds32: implement the unmap_sg DMA operation nds32: consolidate DMA cache maintainance routines x86/pci-dma: switch the VIA 32-bit DMA quirk to use the struct device flag x86/pci-dma: remove the explicit nodac and allowdac option x86/pci-dma: remove the experimental forcesac boot option Documentation/x86: remove a stray reference to pci-nommu.c core, dma-direct: add a flag 32-bit dma limits dma-mapping: remove unused gfp_t parameter to arch_dma_alloc_attrs dma-debug: check scatterlist segments c6x: use generic dma_noncoherent_ops arc: use generic dma_noncoherent_ops arc: fix arc_dma_{map,unmap}_page arc: fix arc_dma_sync_sg_for_{cpu,device} arc: simplify arc_dma_sync_single_for_{cpu,device} dma-mapping: provide a generic dma-noncoherent implementation dma-mapping: simplify Kconfig dependencies riscv: add swiotlb support riscv: only enable ZONE_DMA32 for 64-bit ...
2018-05-29nds32: use generic dma_noncoherent_opsChristoph Hellwig
Switch to the generic noncoherent direct mapping implementation. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Greentime Hu <greentime@andestech.com> Tested-by: Greentime Hu <greentime@andestech.com>
2018-05-29nds32: implement the unmap_sg DMA operationChristoph Hellwig
This matches the implementation of the more commonly used unmap_single routines and the sync_sg_for_cpu method which should provide equivalent cache maintainance. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Greentime Hu <greentime@andestech.com> Tested-by: Greentime Hu <greentime@andestech.com>
2018-05-29nds32: consolidate DMA cache maintainance routinesChristoph Hellwig
Make sure all other DMA methods call nds32_dma_sync_single_for_{device,cpu} to perform cache maintaince, and remove the consisteny_sync helper that implemented both with entirely separate code based off an argument. Also make sure these helpers handled highmem properly, for which code is copy and pasted from mips. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Greentime Hu <greentime@andestech.com> Tested-by: Greentime Hu <greentime@andestech.com>
2018-05-23nds32: Fix compiler warning, Wstringop-overflow, in vdso.cVincent Chen
Getting a compiler warning, Wstringop-overflow, in arch/nds32/kernel/vdso.c when kernel is built by gcc-8. Declaring vdso_start and vdso_end as a pointer to fix this compiler warning. Signed-off-by: Vincent Chen <vincentc@andestech.com> Reviewed-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-05-23nds32: Disable local irq before calling cpu_dcache_wb_page in copy_user_highpageVincent Chen
In order to ensure that all data in source page has been written back to memory before copy_page, the local irq shall be disabled before calling cpu_dcache_wb_page(). In addition, removing unneeded page invalidation for 'to' page. Signed-off-by: Vincent Chen <vincentc@andestech.com> Reviewed-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-05-23nds32: Flush the cache of the page at vmaddr instead of kaddr in flush_anon_pageVincent Chen
According to Documentation/cachetlb.txt, the cache of the page at vmaddr shall be flushed in flush_anon_page instead of the cache of the page at page_address(page). Signed-off-by: Vincent Chen <vincentc@andestech.com> Reviewed-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-05-23nds32: Correct flush_dcache_page functionVincent Chen
1. Disable local irq before d-cache write-back and invalidate. The cpu_dcache_wbinval_page function is composed of d-cache write-back and invalidate. If the local irq is enabled when calling cpu_dcache_wbinval_page, the content of d-cache is possibly updated between write-back and invalidate. In this case, the updated data will be dropped due to the following d-cache invalidation. Therefore, we disable the local irq before calling cpu_dcache_wbinval_page. 2. Correct the data write-back for page aliasing case. Only the page whose (page->index << PAGE_SHIFT) is located at the same page color as page_address(page) needs to execute data write-back in flush_dcache_page function. Signed-off-by: Vincent Chen <vincentc@andestech.com> Reviewed-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-05-23nds32: Fix the unaligned access handlerNickhu
If the kernel config 'CONFIG_ALIGNMENT_TRAP' and the file '/proc/sys/nds32/unaligned_access/enable' are set, the kernel unaligned access handler does not handle correctly when the value of immediate field is negative. This commit fixes the unaligned access handler in kernel. Signed-off-by: Nickhu <nickhu@andestech.com> Reviewed-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-05-23nds32: Renaming the file for unaligned accessNickhu
Change the name of the file '/proc/sys/nds32/unaligned_acess' to '/proc/sys/nds32/unaligned_access' Signed-off-by: Nickhu <nickhu@andestech.com> Reviewed-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-05-23nds32: To fix a cache inconsistency issue by setting correct cacheability of NTCGreentime Hu
The nds32 architecture will use physical memory when interrupt or exception comes and it will use the setting of NTC0-4. The original implementation didn't consider the DRAM start address may start from 1GB, 2GB or 3GB to cause this issue. It will write the data to DRAM if it is running in physical address however kernel will read the data with virtaul address through data cache. In this case, the data of DRAM is latest. This fix will set the correct cacheability to let kernel write/read the latest data in cache instead of DRAM. Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-05-23nds32: To refine readability of INT_MASK_INITAIAL_VALGreentime Hu
Refine readability of INT_MASK_INITAIAL_VAL with meaningful macro instead of magic number. Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-05-23nds32: Fix the virtual address may map too much range by tlbop issue.Greentime Hu
We use tlbop to map virtual address in the first beginning, however it may map too much if DRAM size is not that big. We have to invalidate the mapping when the page table is created. Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-05-23nds32: Fix the allmodconfig build. To make sure CONFIG_CPU_LITTLE_ENDIAN is ↵Greentime Hu
default y This way we can build kernel with CONFIG_CPU_LITTLE_ENDIAN=y. Build allmodconfig and allnoconfig are available too. It also fixes the endian mismatch issue because AFLAGS and LDFLAGS is not passed correctly. Signed-off-by: Vincent Ren-Wei Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-05-23nds32: Fix build failed because arch_trace_hardirqs_off is changed to ↵Greentime Hu
trace_hardirqs_off. It broke the 'allmodconfig' build when CONFIG_TRACE_IRQFLAGS is enabled. Signed-off-by: Nick Chun-Ming Hu <nickhu@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-05-23nds32: Fix the unknown type u8 issue.Greentime Hu
It broke the 'allmodconfig' build. We need to include <linux/types.h> to make sure the type is defined before using it. Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-05-23nds32: Fix the symbols undefined issue by exporting them.Greentime Hu
It broke the 'allmodconfig' build. LD vmlinux SYSMAP System.map Building modules, stage 2. MODPOST 5028 modules ERROR: "flush_dcache_page" [net/sunrpc/xprtrdma/rpcrdma.ko] undefined! ERROR: "empty_zero_page" [net/ceph/libceph.ko] undefined! ERROR: "save_stack_trace" [kernel/backtracetest.ko] undefined! ERROR: "clear_page" [fs/ocfs2/dlm/ocfs2_dlm.ko] undefined! ERROR: "copy_page" [fs/nilfs2/nilfs2.ko] undefined! ... Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-05-23nds32: Fix xfs_buf built failed by export invalidate_kernel_vmap_range and ↵Greentime Hu
flush_kernel_vmap_range It broke the 'allmodconfig' build. fs/xfs/xfs_buf.c: In function 'xfs_buf_bio_end_io': fs/xfs/xfs_buf.c:1242:3: error: implicit declaration of function 'invalidate_kernel_vmap_range' [-Werror=implicit-function-declaration] invalidate_kernel_vmap_range(bp->b_addr, xfs_buf_vmap_len(bp)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/xfs/xfs_buf.c: In function 'xfs_buf_ioapply_map': fs/xfs/xfs_buf.c:1312:4: error: implicit declaration of function 'flush_kernel_vmap_range' [-Werror=implicit-function-declaration] flush_kernel_vmap_range(bp->b_addr, ^~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
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