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2019-12-21xtensa: fix TLB sanity checkerMax Filippov1-2/+2
commit 36de10c4788efc6efe6ff9aa10d38cb7eea4c818 upstream. Virtual and translated addresses retrieved by the xtensa TLB sanity checker must be consistent, i.e. correspond to the same state of the checked TLB entry. KASAN shadow memory is mapped dynamically using auto-refill TLB entries and thus may change TLB state between the virtual and translated address retrieval, resulting in false TLB insanity report. Move read_xtlb_translation close to read_xtlb_virtual to make sure that read values are consistent. Cc: stable@vger.kernel.org Fixes: a99e07ee5e88 ("xtensa: check TLB sanity on return to userspace") Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-29xtensa: drop EXPORT_SYMBOL for outs*/ins*Max Filippov1-7/+0
commit 8b39da985194aac2998dd9e3a22d00b596cebf1e upstream. Custom outs*/ins* implementations are long gone from the xtensa port, remove matching EXPORT_SYMBOLs. This fixes the following build warnings issued by modpost since commit 15bfc2348d54 ("modpost: check for static EXPORT_SYMBOL* functions"): WARNING: "insb" [vmlinux] is a static EXPORT_SYMBOL WARNING: "insw" [vmlinux] is a static EXPORT_SYMBOL WARNING: "insl" [vmlinux] is a static EXPORT_SYMBOL WARNING: "outsb" [vmlinux] is a static EXPORT_SYMBOL WARNING: "outsw" [vmlinux] is a static EXPORT_SYMBOL WARNING: "outsl" [vmlinux] is a static EXPORT_SYMBOL Cc: stable@vger.kernel.org Fixes: d38efc1f150f ("xtensa: adopt generic io routines") Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-08-25xtensa: add missing isync to the cpu_reset TLB codeMax Filippov1-0/+1
commit cd8869f4cb257f22b89495ca40f5281e58ba359c upstream. ITLB entry modifications must be followed by the isync instruction before the new entries are possibly used. cpu_reset lacks one isync between ITLB way 6 initialization and jump to the identity mapping. Add missing isync to xtensa cpu_reset. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-25xtensa: Fix section mismatch between memblock_reserve and mem_reserveGuenter Roeck1-1/+2
[ Upstream commit adefd051a6707a6ca0ebad278d3c1c05c960fc3b ] Since commit 9012d011660ea5cf2 ("compiler: allow all arches to enable CONFIG_OPTIMIZE_INLINING"), xtensa:tinyconfig fails to build with section mismatch errors. WARNING: vmlinux.o(.text.unlikely+0x68): Section mismatch in reference from the function ___pa() to the function .meminit.text:memblock_reserve() WARNING: vmlinux.o(.text.unlikely+0x74): Section mismatch in reference from the function mem_reserve() to the function .meminit.text:memblock_reserve() FATAL: modpost: Section mismatches detected. This was not seen prior to the above mentioned commit because mem_reserve() was always inlined. Mark mem_reserve(() as __init_memblock to have it reside in the same section as memblock_reserve(). Signed-off-by: Guenter Roeck <linux@roeck-us.net> Message-Id: <1559220098-9955-1-git-send-email-linux@roeck-us.net> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-04-17xtensa: fix return_addressMax Filippov1-1/+5
commit ada770b1e74a77fff2d5f539bf6c42c25f4784db upstream. return_address returns the address that is one level higher in the call stack than requested in its argument, because level 0 corresponds to its caller's return address. Use requested level as the number of stack frames to skip. This fixes the address reported by might_sleep and friends. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-14xtensa: SMP: limit number of possible CPUs by NR_CPUSMax Filippov1-0/+5
[ Upstream commit 25384ce5f9530def39421597b1457d9462df6455 ] This fixes the following warning at boot when the kernel is booted on a board with more CPU cores than was configured in NR_CPUS: smp_init_cpus: Core Count = 8 smp_init_cpus: Core Id = 0 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 0 at include/linux/cpumask.h:121 smp_init_cpus+0x54/0x74 Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted 5.0.0-rc3-00015-g1459333f88a0 #124 Call Trace: __warn$part$3+0x6a/0x7c warn_slowpath_null+0x35/0x3c smp_init_cpus+0x54/0x74 setup_arch+0x1c0/0x1d0 start_kernel+0x44/0x310 _startup+0x107/0x107 Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-03-14xtensa: SMP: mark each possible CPU as presentMax Filippov1-1/+1
[ Upstream commit 8b1c42cdd7181200dc1fff39dcb6ac1a3fac2c25 ] Otherwise it is impossible to enable CPUs after booting with 'maxcpus' parameter. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-03-14xtensa: smp_lx200_defconfig: fix vectors clashMax Filippov1-0/+1
[ Upstream commit 306b38305c0f86de7f17c5b091a95451dcc93d7d ] Secondary CPU reset vector overlaps part of the double exception handler code, resulting in weird crashes and hangups when running user code. Move exception vectors one page up so that they don't clash with the secondary CPU reset vector. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-03-14xtensa: SMP: fix secondary CPU initializationMax Filippov2-14/+25
[ Upstream commit 32a7726c4f4aadfabdb82440d84f88a5a2c8fe13 ] - add missing memory barriers to the secondary CPU synchronization spin loops; add comment to the matching memory barrier in the boot_secondary and __cpu_die functions; - use READ_ONCE/WRITE_ONCE to access cpu_start_id/cpu_start_ccount instead of reading/writing them directly; - re-initialize cpu_running every time before starting secondary CPU to flush possible previous CPU startup results. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-03-14xtensa: SMP: fix ccount_timer_shutdownMax Filippov1-1/+1
[ Upstream commit 4fe8713b873fc881284722ce4ac47995de7cf62c ] ccount_timer_shutdown is called from the atomic context in the secondary_start_kernel, resulting in the following BUG: BUG: sleeping function called from invalid context in_atomic(): 1, irqs_disabled(): 1, pid: 0, name: swapper/1 Preemption disabled at: secondary_start_kernel+0xa1/0x130 Call Trace: ___might_sleep+0xe7/0xfc __might_sleep+0x41/0x44 synchronize_irq+0x24/0x64 disable_irq+0x11/0x14 ccount_timer_shutdown+0x12/0x20 clockevents_switch_state+0x82/0xb4 clockevents_exchange_device+0x54/0x60 tick_check_new_device+0x46/0x70 clockevents_register_device+0x8c/0xc8 clockevents_config_and_register+0x1d/0x2c local_timer_setup+0x75/0x7c secondary_start_kernel+0xb4/0x130 should_never_return+0x32/0x35 Use disable_irq_nosync instead of disable_irq to avoid it. This is safe because the ccount timer IRQ is per-CPU, and once IRQ is masked the ISR will not be called. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-03-10xtensa: fix get_wchanMax Filippov1-2/+2
commit d90b88fd3653f1fb66ecc6571b860d5a5749fa56 upstream. Stack unwinding is implemented incorrectly in xtensa get_wchan: instead of extracting a0 and a1 registers from the spill location under the stack pointer it extracts a word pointed to by the stack pointer and subtracts 4 or 3 from it. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-12xtensa: xtfpga.dtsi: fix dtc warnings about SPIMax Filippov1-1/+1
[ Upstream commit f37598be4e3896359e87c824be57ddddc280cc3f ] Rename SPI controller node in the XTFPGA DTS to spi@... This fixes the following build warnings: arch/xtensa/boot/dts/kc705_nommu.dtb: Warning (spi_bus_bridge): /soc/spi-master@0d0a0000: node name for SPI buses should be 'spi' arch/xtensa/boot/dts/kc705_nommu.dtb: Warning (spi_bus_reg): Failed prerequisite 'spi_bus_bridge' arch/xtensa/boot/dts/lx200mx.dtb: Warning (spi_bus_bridge): /soc/spi-master@0d0a0000: node name for SPI buses should be 'spi' arch/xtensa/boot/dts/lx200mx.dtb: Warning (spi_bus_reg): Failed prerequisite 'spi_bus_bridge' arch/xtensa/boot/dts/kc705.dtb: Warning (spi_bus_bridge): /soc/spi-master@0d0a0000: node name for SPI buses should be 'spi' arch/xtensa/boot/dts/kc705.dtb: Warning (spi_bus_reg): Failed prerequisite 'spi_bus_bridge' arch/xtensa/boot/dts/ml605.dtb: Warning (spi_bus_bridge): /soc/spi-master@0d0a0000: node name for SPI buses should be 'spi' arch/xtensa/boot/dts/ml605.dtb: Warning (spi_bus_reg): Failed prerequisite 'spi_bus_bridge' arch/xtensa/boot/dts/lx60.dtb: Warning (spi_bus_bridge): /soc/spi-master@0d0a0000: node name for SPI buses should be 'spi' arch/xtensa/boot/dts/lx60.dtb: Warning (spi_bus_reg): Failed prerequisite 'spi_bus_bridge' Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2018-12-05xtensa: fix coprocessor part of ptrace_{get,set}xregsMax Filippov1-4/+38
commit 38a35a78c5e270cbe53c4fef6b0d3c2da90dd849 upstream. Layout of coprocessor registers in the elf_xtregs_t and xtregs_coprocessor_t may be different due to alignment. Thus it is not always possible to copy data between the xtregs_coprocessor_t structure and the elf_xtregs_t and get correct values for all registers. Use a table of offsets and sizes of individual coprocessor register groups to do coprocessor context copying in the ptrace_getxregs and ptrace_setxregs. This fixes incorrect coprocessor register values reading from the user process by the native gdb on an xtensa core with multiple coprocessors and registers with high alignment requirements. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-12-05xtensa: fix coprocessor context offset definitionsMax Filippov1-8/+8
commit 03bc996af0cc71c7f30c384d8ce7260172423b34 upstream. Coprocessor context offsets are used by the assembly code that moves coprocessor context between the individual fields of the thread_info::xtregs_cp structure and coprocessor registers. This fixes coprocessor context clobbering on flushing and reloading during normal user code execution and user process debugging in the presence of more than one coprocessor in the core configuration. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-12-05xtensa: enable coprocessors that are being flushedMax Filippov1-1/+4
commit 2958b66694e018c552be0b60521fec27e8d12988 upstream. coprocessor_flush_all may be called from a context of a thread that is different from the thread being flushed. In that case contents of the cpenable special register may not match ti->cpenable of the target thread, resulting in unhandled coprocessor exception in the kernel context. Set cpenable special register to the ti->cpenable of the target register for the duration of the flush and restore it afterwards. This fixes the following crash caused by coprocessor register inspection in native gdb: (gdb) p/x $w0 Illegal instruction in kernel: sig: 9 [#1] PREEMPT Call Trace: ___might_sleep+0x184/0x1a4 __might_sleep+0x41/0xac exit_signals+0x14/0x218 do_exit+0xc9/0x8b8 die+0x99/0xa0 do_illegal_instruction+0x18/0x6c common_exception+0x77/0x77 coprocessor_flush+0x16/0x3c arch_ptrace+0x46c/0x674 sys_ptrace+0x2ce/0x3b4 system_call+0x54/0x80 common_exception+0x77/0x77 note: gdb[100] exited with preempt_count 1 Killed Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-21xtensa: fix boot parameters address translationMax Filippov1-2/+5
commit 40dc948f234b73497c3278875eb08a01d5854d3f upstream. The bootloader may pass physical address of the boot parameters structure to the MMUv3 kernel in the register a2. Code in the _SetupMMU block in the arch/xtensa/kernel/head.S is supposed to map that physical address to the virtual address in the configured virtual memory layout. This code haven't been updated when additional 256+256 and 512+512 memory layouts were introduced and it may produce wrong addresses when used with these layouts. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-21xtensa: make sure bFLT stack is 16 byte alignedMax Filippov1-1/+5
commit 0773495b1f5f1c5e23551843f87b5ff37e7af8f7 upstream. Xtensa ABI requires stack alignment to be at least 16. In noMMU configuration ARCH_SLAB_MINALIGN is used to align stack. Make it at least 16. This fixes the following runtime error in noMMU configuration, caused by interaction between insufficiently aligned stack and alloca function, that results in corruption of on-stack variable in the libc function glob: Caught unhandled exception in 'sh' (pid = 47, pc = 0x02d05d65) - should not happen EXCCAUSE is 15 Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-21xtensa: add NOTES section to the linker scriptMax Filippov2-1/+2
commit 4119ba211bc4f1bf638f41e50b7a0f329f58aa16 upstream. This section collects all source .note.* sections together in the vmlinux image. Without it .note.Linux section may be placed at address 0, while the rest of the kernel is at its normal address, resulting in a huge vmlinux.bin image that may not be linked into the xtensa Image.elf. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-12xtensa: enable SG chaining in KconfigMax Filippov1-0/+1
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-09-12xtensa: remove unnecessary KBUILD_SRC ifeq conditionalMasahiro Yamada1-4/+0
You can always prefix variant/platform header search paths with $(srctree)/ because $(srctree) is '.' for in-tree building. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-09-06xtensa: ISS: don't allocate memory in platform_setupMax Filippov1-10/+15
Memory allocator is not initialized at that point yet, use static array instead. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-08-25Merge tag 'kbuild-v4.19-2' of ↵Linus Torvalds2-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull more Kbuild updates from Masahiro Yamada: - add build_{menu,n,g,x}config targets for compile-testing Kconfig - fix and improve recursive dependency detection in Kconfig - fix parallel building of menuconfig/nconfig - fix syntax error in clang-version.sh - suppress distracting log from syncconfig - remove obsolete "rpm" target - remove VMLINUX_SYMBOL(_STR) macro entirely - fix microblaze build with CONFIG_DYNAMIC_FTRACE - move compiler test for dead code/data elimination to Kconfig - rename well-known LDFLAGS variable to KBUILD_LDFLAGS - misc fixes and cleanups * tag 'kbuild-v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kbuild: rename LDFLAGS to KBUILD_LDFLAGS kbuild: pass LDFLAGS to recordmcount.pl kbuild: test dead code/data elimination support in Kconfig initramfs: move gen_initramfs_list.sh from scripts/ to usr/ vmlinux.lds.h: remove stale <linux/export.h> include export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR() Coccinelle: remove pci_alloc_consistent semantic to detect in zalloc-simple.cocci kbuild: make sorting initramfs contents independent of locale kbuild: remove "rpm" target, which is alias of "rpm-pkg" kbuild: Fix LOADLIBES rename in Documentation/kbuild/makefiles.txt kconfig: suppress "configuration written to .config" for syncconfig kconfig: fix "Can't open ..." in parallel build kbuild: Add a space after `!` to prevent parsing as file pattern scripts: modpost: check memory allocation results kconfig: improve the recursive dependency report kconfig: report recursive dependency involving 'imply' kconfig: error out when seeing recursive dependency kconfig: add build-only configurator targets scripts/dtc: consolidate include path options in Makefile
2018-08-24kbuild: rename LDFLAGS to KBUILD_LDFLAGSMasahiro Yamada2-2/+2
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>
2018-08-23Merge tag 'xtensa-20180820' of git://github.com/jcmvbkbc/linux-xtensaLinus Torvalds25-310/+1300
Pull Xtensa updates from Max Filippov: - switch xtensa arch to the generic noncoherent direct mapping operations - add support for DMA_ATTR_NO_KERNEL_MAPPING attribute - clean up users of platform/hardware.h in generic Xtensa code - fix assembly cache maintenance code for long cache lines - rework noMMU cache attributes initialization - add big-endian HiFi2 test_kc705_be CPU variant * tag 'xtensa-20180820' of git://github.com/jcmvbkbc/linux-xtensa: xtensa: add test_kc705_be variant xtensa: clean up boot-elf/bootstrap.S xtensa: make bootparam parsing optional xtensa: drop variant IRQ support xtensa: drop unneeded platform/hardware.h headers xtensa: move PLATFORM_NR_IRQS to Kconfig xtensa: rework {CONFIG,PLATFORM}_DEFAULT_MEM_START xtensa: drop unused {CONFIG,PLATFORM}_DEFAULT_MEM_SIZE xtensa: rework noMMU cache attributes initialization xtensa: increase ranges in ___invalidate_{i,d}cache_all xtensa: limit offsets in __loop_cache_{all,page} xtensa: platform-specific handling of coherent memory xtensa: support DMA_ATTR_NO_KERNEL_MAPPING attribute xtensa: use generic dma_noncoherent_ops
2018-08-20Merge branch 'xtensa-dma-fixes' (early part) into xtensa-fixesMax Filippov7-154/+110
This switches xtensa arch to the generic noncoherent direct mapping operations, adds support for DMA_ATTR_NO_KERNEL_MAPPING attribute and allows for platform-specific handling of coherent memory. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-08-20xtensa: add test_kc705_be variantMax Filippov3-0/+1065
test_kc705_be is a big-endian Xtensa core with HiFi2 instructions. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-08-20xtensa: clean up boot-elf/bootstrap.SMax Filippov1-11/+6
Drop unneeded headers, rewrite literal definitions with .literal. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-08-20xtensa: make bootparam parsing optionalMax Filippov3-1/+22
A kernel may not need any boot parameters from the bootloader, allow disabling bootparam parsing in that case. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-08-20xtensa: drop variant IRQ supportMax Filippov3-21/+1
If an xtensa core provides an additional IRQ controller it should be treated as a separate piece of hardware and be driven by an irqchip driver. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-08-20xtensa: drop unneeded platform/hardware.h headersMax Filippov5-23/+1
platform/hardware.h no longer supply any information for processor.h, vectors.h, setup.c or vmlinux.lds.S, don't include it. This header is now empty in the platforms/iss, so remove it altogether. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-08-20xtensa: move PLATFORM_NR_IRQS to KconfigMax Filippov4-10/+7
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-08-20xtensa: rework {CONFIG,PLATFORM}_DEFAULT_MEM_STARTMax Filippov5-31/+9
Drop PLATFORM_DEFAULT_MEM_START from the platform/hardware.h headers. Provide definition of CONFIG_DEFAULT_MEM_START always, allow changing it only in noMMU configurations when PLATFORM_WANT_DEFAULT_MEM is selected. Change prompt and description so that it's clear that it controls PAGE_OFFSET and PHYS_OFFSET. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-08-20xtensa: drop unused {CONFIG,PLATFORM}_DEFAULT_MEM_SIZEMax Filippov5-15/+0
Now that noMMU cache attributes are set up separately drop no longer used macro PLATFORM_DEFAULT_MEM_SIZE and config symbol CONFIG_DEFAULT_MEM_SIZE used for setting it. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-08-18kernel/dma: remove unsupported gfp_mask parameter from ↵Marek Szyprowski1-1/+1
dma_alloc_from_contiguous() The CMA memory allocator doesn't support standard gfp flags for memory allocation, so there is no point having it as a parameter for dma_alloc_from_contiguous() function. Replace it by a boolean no_warn argument, which covers all the underlaying cma_alloc() function supports. This will help to avoid giving false feeling that this function supports standard gfp flags and callers can pass __GFP_ZERO to get zeroed buffer, what has already been an issue: see commit dd65a941f6ba ("arm64: dma-mapping: clear buffers allocated with FORCE_CONTIGUOUS flag"). Link: http://lkml.kernel.org/r/20180709122020eucas1p21a71b092975cb4a3b9954ffc63f699d1~-sqUFoa-h2939329393eucas1p2Y@eucas1p2.samsung.com Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Michał Nazarewicz <mina86@mina86.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Laura Abbott <labbott@redhat.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Joonsoo Kim <js1304@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-08-18mm: convert return type of handle_mm_fault() caller to vm_fault_tSouptick Joarder1-1/+1
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>
2018-08-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds1-0/+3
Pull networking updates from David Miller: "Highlights: - Gustavo A. R. Silva keeps working on the implicit switch fallthru changes. - Support 802.11ax High-Efficiency wireless in cfg80211 et al, From Luca Coelho. - Re-enable ASPM in r8169, from Kai-Heng Feng. - Add virtual XFRM interfaces, which avoids all of the limitations of existing IPSEC tunnels. From Steffen Klassert. - Convert GRO over to use a hash table, so that when we have many flows active we don't traverse a long list during accumluation. - Many new self tests for routing, TC, tunnels, etc. Too many contributors to mention them all, but I'm really happy to keep seeing this stuff. - Hardware timestamping support for dpaa_eth/fsl-fman from Yangbo Lu. - Lots of cleanups and fixes in L2TP code from Guillaume Nault. - Add IPSEC offload support to netdevsim, from Shannon Nelson. - Add support for slotting with non-uniform distribution to netem packet scheduler, from Yousuk Seung. - Add UDP GSO support to mlx5e, from Boris Pismenny. - Support offloading of Team LAG in NFP, from John Hurley. - Allow to configure TX queue selection based upon RX queue, from Amritha Nambiar. - Support ethtool ring size configuration in aquantia, from Anton Mikaev. - Support DSCP and flowlabel per-transport in SCTP, from Xin Long. - Support list based batching and stack traversal of SKBs, this is very exciting work. From Edward Cree. - Busyloop optimizations in vhost_net, from Toshiaki Makita. - Introduce the ETF qdisc, which allows time based transmissions. IGB can offload this in hardware. From Vinicius Costa Gomes. - Add parameter support to devlink, from Moshe Shemesh. - Several multiplication and division optimizations for BPF JIT in nfp driver, from Jiong Wang. - Lots of prepatory work to make more of the packet scheduler layer lockless, when possible, from Vlad Buslov. - Add ACK filter and NAT awareness to sch_cake packet scheduler, from Toke Høiland-Jørgensen. - Support regions and region snapshots in devlink, from Alex Vesker. - Allow to attach XDP programs to both HW and SW at the same time on a given device, with initial support in nfp. From Jakub Kicinski. - Add TLS RX offload and support in mlx5, from Ilya Lesokhin. - Use PHYLIB in r8169 driver, from Heiner Kallweit. - All sorts of changes to support Spectrum 2 in mlxsw driver, from Ido Schimmel. - PTP support in mv88e6xxx DSA driver, from Andrew Lunn. - Make TCP_USER_TIMEOUT socket option more accurate, from Jon Maxwell. - Support for templates in packet scheduler classifier, from Jiri Pirko. - IPV6 support in RDS, from Ka-Cheong Poon. - Native tproxy support in nf_tables, from Máté Eckl. - Maintain IP fragment queue in an rbtree, but optimize properly for in-order frags. From Peter Oskolkov. - Improvde handling of ACKs on hole repairs, from Yuchung Cheng" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1996 commits) bpf: test: fix spelling mistake "REUSEEPORT" -> "REUSEPORT" hv/netvsc: Fix NULL dereference at single queue mode fallback net: filter: mark expected switch fall-through xen-netfront: fix warn message as irq device name has '/' cxgb4: Add new T5 PCI device ids 0x50af and 0x50b0 net: dsa: mv88e6xxx: missing unlock on error path rds: fix building with IPV6=m inet/connection_sock: prefer _THIS_IP_ to current_text_addr net: dsa: mv88e6xxx: bitwise vs logical bug net: sock_diag: Fix spectre v1 gadget in __sock_diag_cmd() ieee802154: hwsim: using right kind of iteration net: hns3: Add vlan filter setting by ethtool command -K net: hns3: Set tx ring' tc info when netdev is up net: hns3: Remove tx ring BD len register in hns3_enet net: hns3: Fix desc num set to default when setting channel net: hns3: Fix for phy link issue when using marvell phy driver net: hns3: Fix for information of phydev lost problem when down/up net: hns3: Fix for command format parsing error in hclge_is_all_function_id_zero net: hns3: Add support for serdes loopback selftest bnxt_en: take coredump_record structure off stack ...
2018-08-15Merge tag 'kconfig-v4.19-2' of ↵Linus Torvalds2-34/+0
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
2018-08-15Merge tag 'kbuild-v4.19' of ↵Linus Torvalds1-2/+1
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - verify depmod is installed before modules_install - support build salt in case build ids must be unique between builds - allow users to specify additional host compiler flags via HOST*FLAGS, and rename internal variables to KBUILD_HOST*FLAGS - update buildtar script to drop vax support, add arm64 support - update builddeb script for better debarch support - document the pit-fall of if_changed usage - fix parallel build of UML with O= option - make 'samples' target depend on headers_install to fix build errors - remove deprecated host-progs variable - add a new coccinelle script for refcount_t vs atomic_t check - improve double-test coccinelle script - misc cleanups and fixes * tag 'kbuild-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (41 commits) coccicheck: return proper error code on fail Coccinelle: doubletest: reduce side effect false positives kbuild: remove deprecated host-progs variable kbuild: make samples really depend on headers_install um: clean up archheaders recipe kbuild: add %asm-generic to no-dot-config-targets um: fix parallel building with O= option scripts: Add Python 3 support to tracing/draw_functrace.py builddeb: Add automatic support for sh{3,4}{,eb} architectures builddeb: Add automatic support for riscv* architectures builddeb: Add automatic support for m68k architecture builddeb: Add automatic support for or1k architecture builddeb: Add automatic support for sparc64 architecture builddeb: Add automatic support for mips{,64}r6{,el} architectures builddeb: Add automatic support for mips64el architecture builddeb: Add automatic support for ppc64 and powerpcspe architectures builddeb: Introduce functions to simplify kconfig tests in set_debarch builddeb: Drop check for 32-bit s390 builddeb: Change architecture detection fallback to use dpkg-architecture builddeb: Skip architecture detection when KBUILD_DEBARCH is set ...
2018-08-14xtensa: rework noMMU cache attributes initializationMax Filippov4-21/+41
Marking default memory region as cached is not always sufficient and is not flexible. Allow specifying cache attributes for the whole memory address space with new config entry MEMMAP_CACHEATTR. Apply it after cache initialization. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-08-14xtensa: increase ranges in ___invalidate_{i,d}cache_allMax Filippov1-2/+2
Cache invalidation macros use cache line size to iterate over invalidated cache lines, assuming that all cache ways are invalidated by single instruction, but xtensa ISA recommends to not assume that for future compatibility: In some implementations all ways at index Addry-1..z are invalidated regardless of the specified way, but for future compatibility this behavior should not be assumed. Iterate over all cache ways in ___invalidate_icache_all and ___invalidate_dcache_all. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-08-14xtensa: limit offsets in __loop_cache_{all,page}Max Filippov1-25/+40
When building kernel for xtensa cores with big cache lines (e.g. 128 bytes or more) __loop_cache_all and __loop_cache_page may generate assembly instructions with immediate fields that are too big. This results in the following build errors: arch/xtensa/mm/misc.S: Assembler messages: arch/xtensa/mm/misc.S:464: Error: operand 2 of 'diwbi' has invalid value '256' arch/xtensa/mm/misc.S:464: Error: operand 2 of 'diwbi' has invalid value '384' arch/xtensa/kernel/head.S: Assembler messages: arch/xtensa/kernel/head.S:172: Error: operand 2 of 'diu' has invalid value '256' arch/xtensa/kernel/head.S:172: Error: operand 2 of 'diu' has invalid value '384' arch/xtensa/kernel/head.S:176: Error: operand 2 of 'iiu' has invalid value '256' arch/xtensa/kernel/head.S:176: Error: operand 2 of 'iiu' has invalid value '384' arch/xtensa/kernel/head.S:255: Error: operand 2 of 'diwb' has invalid value '256' arch/xtensa/kernel/head.S:255: Error: operand 2 of 'diwb' has invalid value '384' Add parameter max_immed to these macros and use it to limit values of immediate operands. Extract common code of these macros into the new macro __loop_cache_unroll. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-08-13Merge branch 'perf-core-for-linus' of ↵Linus Torvalds2-27/+20
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf update from Thomas Gleixner: "The perf crowd presents: Kernel updates: - Removal of jprobes - Cleanup and consolidatation the handling of kprobes - Cleanup and consolidation of hardware breakpoints - The usual pile of fixes and updates to PMUs and event descriptors Tooling updates: - Updates and improvements all over the place. Nothing outstanding, just the (good) boring incremental grump work" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (103 commits) perf trace: Do not require --no-syscalls to suppress strace like output perf bpf: Include uapi/linux/bpf.h from the 'perf trace' script's bpf.h perf tools: Allow overriding MAX_NR_CPUS at compile time perf bpf: Show better message when failing to load an object perf list: Unify metric group description format with PMU event description perf vendor events arm64: Update ThunderX2 implementation defined pmu core events perf cs-etm: Generate branch sample for CS_ETM_TRACE_ON packet perf cs-etm: Generate branch sample when receiving a CS_ETM_TRACE_ON packet perf cs-etm: Support dummy address value for CS_ETM_TRACE_ON packet perf cs-etm: Fix start tracing packet handling perf build: Fix installation directory for eBPF perf c2c report: Fix crash for empty browser perf tests: Fix indexing when invoking subtests perf trace: Beautify the AF_INET & AF_INET6 'socket' syscall 'protocol' args perf trace beauty: Add beautifiers for 'socket''s 'protocol' arg perf trace beauty: Do not print NULL strarray entries perf beauty: Add a generator for IPPROTO_ socket's protocol constants tools include uapi: Grab a copy of linux/in.h perf tests: Fix complex event name parsing perf evlist: Fix error out while applying initial delay and LBR ...
2018-08-09kbuild: remove deprecated host-progs variableMasahiro Yamada1-2/+1
The host-progs has been kept as an alias of hostprogs-y for a long time (at least since the beginning of Git era), with the clear prompt: Usage of host-progs is deprecated. Please replace with hostprogs-y! Enough time for the migration has passed. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Max Filippov <jcmvbkbc@gmail.com>
2018-08-02kconfig: include kernel/Kconfig.preempt from init/KconfigChristoph Hellwig1-2/+0
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 Hellwig2-7/+0
Move the source of lib/Kconfig.debug and arch/$(ARCH)/Kconfig.debug to the top-level Kconfig. For two architectures that means moving their arch-specific symbols in that menu into a new arch Kconfig.debug file, and for a few more creating a dummy file so that we can include it unconditionally. Also move the actual 'Kernel hacking' menu to lib/Kconfig.debug, where it belongs. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-08-02kconfig: include common Kconfig files from top-level KconfigChristoph Hellwig1-25/+0
Instead of duplicating the source statements in every architecture just do it once in the toplevel Kconfig file. Note that with this the inclusion of arch/$(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>
2018-07-12xtensa: platform-specific handling of coherent memoryMax Filippov4-21/+93
Memory layout is not fixed for noMMU xtensa configurations. Platforms that need to use coherent DMA should implement platform_vaddr_* helpers that check address type (cached/uncached) and convert addresses between these types. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-07-11xtensa: support DMA_ATTR_NO_KERNEL_MAPPING attributeMax Filippov1-2/+8
An application that doesn't need kernel mapping of the DMA memory it allocates may specify DMA_ATTR_NO_KERNEL_MAPPING attribute to allocation function. Support this attribute and return address of the first struct page that covers the allocation. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-07-11xtensa: use generic dma_noncoherent_opsChristoph Hellwig4-141/+19
Switch to the generic noncoherent direct mapping implementation. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-07-04net: Add a new socket option for a future transmit time.Richard Cochran1-0/+3
This patch introduces SO_TXTIME. User space enables this option in order to pass a desired future transmit time in a CMSG when calling sendmsg(2). The argument to this socket option is a 8-bytes long struct provided by the uapi header net_tstamp.h defined as: struct sock_txtime { clockid_t clockid; u32 flags; }; Note that new fields were added to struct sock by filling a 2-bytes hole found in the struct. For that reason, neither the struct size or number of cachelines were altered. Signed-off-by: Richard Cochran <rcochran@linutronix.de> Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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