aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mm (follow)
AgeCommit message (Collapse)AuthorFilesLines
2017-02-25Merge tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdmaLinus Torvalds1-11/+11
Pull rdma DMA mapping updates from Doug Ledford: "Drop IB DMA mapping code and use core DMA code instead. Bart Van Assche noted that the ib DMA mapping code was significantly similar enough to the core DMA mapping code that with a few changes it was possible to remove the IB DMA mapping code entirely and switch the RDMA stack to use the core DMA mapping code. This resulted in a nice set of cleanups, but touched the entire tree and has been kept separate for that reason." * tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (37 commits) IB/rxe, IB/rdmavt: Use dma_virt_ops instead of duplicating it IB/core: Remove ib_device.dma_device nvme-rdma: Switch from dma_device to dev.parent RDS: net: Switch from dma_device to dev.parent IB/srpt: Modify a debug statement IB/srp: Switch from dma_device to dev.parent IB/iser: Switch from dma_device to dev.parent IB/IPoIB: Switch from dma_device to dev.parent IB/rxe: Switch from dma_device to dev.parent IB/vmw_pvrdma: Switch from dma_device to dev.parent IB/usnic: Switch from dma_device to dev.parent IB/qib: Switch from dma_device to dev.parent IB/qedr: Switch from dma_device to dev.parent IB/ocrdma: Switch from dma_device to dev.parent IB/nes: Remove a superfluous assignment statement IB/mthca: Switch from dma_device to dev.parent IB/mlx5: Switch from dma_device to dev.parent IB/mlx4: Switch from dma_device to dev.parent IB/i40iw: Remove a superfluous assignment statement IB/hns: Switch from dma_device to dev.parent ...
2017-02-24mm: wire up GFP flag passing in dma_alloc_from_contiguousLucas Stach1-7/+9
The callers of the DMA alloc functions already provide the proper context GFP flags. Make sure to pass them through to the CMA allocator, to make the CMA compaction context aware. Link: http://lkml.kernel.org/r/20170127172328.18574-3-l.stach@pengutronix.de Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Acked-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Radim Krcmar <rkrcmar@redhat.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Chris Zankel <chris@zankel.net> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Alexander Graf <agraf@suse.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-02-21Merge tag 'rodata-v4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linuxLinus Torvalds2-15/+3
Pull rodata updates from Kees Cook: "This renames the (now inaccurate) DEBUG_RODATA and related SET_MODULE_RONX configs to the more sensible STRICT_KERNEL_RWX and STRICT_MODULE_RWX" * tag 'rodata-v4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: arch: Rename CONFIG_DEBUG_RODATA and CONFIG_DEBUG_MODULE_RONX arch: Move CONFIG_DEBUG_RODATA and CONFIG_SET_MODULE_RONX to be common
2017-02-21Merge tag 'extable-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linuxLinus Torvalds2-2/+2
Pull exception table module split from Paul Gortmaker: "Final extable.h related changes. This completes the separation of exception table content from the module.h header file. This is achieved with the final commit that removes the one line back compatible change that sourced extable.h into the module.h file. The commits are unchanged since January, with the exception of a couple Acks that came in for the last two commits a bit later. The changes have been in linux-next for quite some time[1] and have got widespread arch coverage via toolchains I have and also from additional ones the kbuild bot has. Maintaners of the various arch were Cc'd during the postings to lkml[2] and informed that the intention was to take the remaining arch specific changes and lump them together with the final two non-arch specific changes and submit for this merge window. The ia64 diffstat stands out and probably warrants a mention. In an earlier review, Al Viro made a valid comment that the original header separation of content left something to be desired, and that it get fixed as a part of this change, hence the larger diffstat" * tag 'extable-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux: (21 commits) module.h: remove extable.h include now users have migrated core: migrate exception table users off module.h and onto extable.h cris: migrate exception table users off module.h and onto extable.h hexagon: migrate exception table users off module.h and onto extable.h microblaze: migrate exception table users off module.h and onto extable.h unicore32: migrate exception table users off module.h and onto extable.h score: migrate exception table users off module.h and onto extable.h metag: migrate exception table users off module.h and onto extable.h arc: migrate exception table users off module.h and onto extable.h nios2: migrate exception table users off module.h and onto extable.h sparc: migrate exception table users onto extable.h openrisc: migrate exception table users off module.h and onto extable.h frv: migrate exception table users off module.h and onto extable.h sh: migrate exception table users off module.h and onto extable.h xtensa: migrate exception table users off module.h and onto extable.h mn10300: migrate exception table users off module.h and onto extable.h alpha: migrate exception table users off module.h and onto extable.h arm: migrate exception table users off module.h and onto extable.h m32r: migrate exception table users off module.h and onto extable.h ia64: ensure exception table search users include extable.h ...
2017-02-20Merge tag 'iommu-updates-v4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommuLinus Torvalds1-30/+30
Pull IOMMU UPDATES from Joerg Roedel: - KVM PCIe/MSI passthrough support on ARM/ARM64 - introduction of a core representation for individual hardware iommus - support for IOMMU privileged mappings as supported by some ARM IOMMUS - 16-bit SID support for ARM-SMMUv2 - stream table optimization for ARM-SMMUv3 - various fixes and other small improvements * tag 'iommu-updates-v4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (61 commits) vfio/type1: Fix error return code in vfio_iommu_type1_attach_group() iommu: Remove iommu_register_instance interface iommu/exynos: Make use of iommu_device_register interface iommu/mediatek: Make use of iommu_device_register interface iommu/msm: Make use of iommu_device_register interface iommu/arm-smmu: Make use of the iommu_register interface iommu: Add iommu_device_set_fwnode() interface iommu: Make iommu_device_link/unlink take a struct iommu_device iommu: Add sysfs bindings for struct iommu_device iommu: Introduce new 'struct iommu_device' iommu: Rename struct iommu_device iommu: Rename iommu_get_instance() iommu: Fix static checker warning in iommu_insert_device_resv_regions iommu: Avoid unnecessary assignment of dev->iommu_fwspec iommu/mediatek: Remove bogus 'select' statements iommu/dma: Remove bogus dma_supported() implementation iommu/ipmmu-vmsa: Restrict IOMMU Domain Geometry to 32-bit address space iommu/vt-d: Don't over-free page table directories iommu/vt-d: Tylersburg isoch identity map check is done too late. iommu/vt-d: Fix some macros that are incorrectly specified in intel-iommu ...
2017-02-07arch: Rename CONFIG_DEBUG_RODATA and CONFIG_DEBUG_MODULE_RONXLaura Abbott2-3/+3
Both of these options are poorly named. The features they provide are necessary for system security and should not be considered debug only. Change the names to CONFIG_STRICT_KERNEL_RWX and CONFIG_STRICT_MODULE_RWX to better describe what these options do. Signed-off-by: Laura Abbott <labbott@redhat.com> Acked-by: Jessica Yu <jeyu@redhat.com> Signed-off-by: Kees Cook <keescook@chromium.org>
2017-02-07arch: Move CONFIG_DEBUG_RODATA and CONFIG_SET_MODULE_RONX to be commonLaura Abbott1-12/+0
There are multiple architectures that support CONFIG_DEBUG_RODATA and CONFIG_SET_MODULE_RONX. These options also now have the ability to be turned off at runtime. Move these to an architecture independent location and make these options def_bool y for almost all of those arches. Signed-off-by: Laura Abbott <labbott@redhat.com> Acked-by: Ingo Molnar <mingo@kernel.org> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Kees Cook <keescook@chromium.org>
2017-01-30ARM: 8642/1: LPAE: catch pending imprecise abort on unmaskAlexander Sverdlin2-2/+6
Asynchronous external abort is coded differently in DFSR with LPAE enabled. Fixes: 9254970c "ARM: 8447/1: catch pending imprecise abort on unmask". Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2017-01-24arm: migrate exception table users off module.h and onto extable.hPaul Gortmaker2-2/+2
These files were only including module.h for exception table related functions. We've now separated that content out into its own file "extable.h" so now move over to that and avoid all the extra header content in module.h that we don't really need to compile these files. Cc: Russell King <linux@armlinux.org.uk> Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2017-01-24treewide: Constify most dma_map_ops structuresBart Van Assche1-11/+11
Most dma_map_ops structures are never modified. Constify these structures such that these can be write-protected. This patch has been generated as follows: git grep -l 'struct dma_map_ops' | xargs -d\\n sed -i \ -e 's/struct dma_map_ops/const struct dma_map_ops/g' \ -e 's/const struct dma_map_ops {/struct dma_map_ops {/g' \ -e 's/^const struct dma_map_ops;$/struct dma_map_ops;/' \ -e 's/const const struct dma_map_ops /const struct dma_map_ops /g'; sed -i -e 's/const \(struct dma_map_ops intel_dma_ops\)/\1/' \ $(git grep -l 'struct dma_map_ops intel_dma_ops'); sed -i -e 's/const \(struct dma_map_ops dma_iommu_ops\)/\1/' \ $(git grep -l 'struct dma_map_ops' | grep ^arch/powerpc); sed -i -e '/^struct vmd_dev {$/,/^};$/ s/const \(struct dma_map_ops[[:blank:]]dma_ops;\)/\1/' \ -e '/^static void vmd_setup_dma_ops/,/^}$/ s/const \(struct dma_map_ops \*dest\)/\1/' \ -e 's/const \(struct dma_map_ops \*dest = \&vmd->dma_ops\)/\1/' \ drivers/pci/host/*.c sed -i -e '/^void __init pci_iommu_alloc(void)$/,/^}$/ s/dma_ops->/intel_dma_ops./' arch/ia64/kernel/pci-dma.c sed -i -e 's/static const struct dma_map_ops sn_dma_ops/static struct dma_map_ops sn_dma_ops/' arch/ia64/sn/pci/pci_dma.c sed -i -e 's/(const struct dma_map_ops \*)//' drivers/misc/mic/bus/vop_bus.c Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: linux-arch@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Russell King <linux@armlinux.org.uk> Cc: x86@kernel.org Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-19arm/dma-mapping: Implement DMA_ATTR_PRIVILEGEDSricharan R1-30/+30
The newly added DMA_ATTR_PRIVILEGED is useful for creating mappings that are only accessible to privileged DMA engines. Adding it to the arm dma-mapping.c so that the ARM32 DMA IOMMU mapper can make use of it. Signed-off-by: Sricharan R <sricharan@codeaurora.org> Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2016-12-25cpu/hotplug: Cleanup state namesThomas Gleixner2-2/+2
When the state names got added a script was used to add the extra argument to the calls. The script basically converted the state constant to a string, but the cleanup to convert these strings into meaningful ones did not happen. Replace all the useless strings with 'subsys/xxx/yyy:state' strings which are used in all the other places already. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Link: http://lkml.kernel.org/r/20161221192112.085444152@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-12-14Merge branches 'clkdev', 'fixes', 'misc' and 'sa1100-base' into for-linusRussell King5-26/+47
2016-11-29ARM: mm: allow set_memory_*() to be used on the vmalloc regionRussell King1-1/+2
We can allow modules to be loaded into the vmalloc region, where they should also benefit from the same protections as those loaded into the more efficient module region. Allow these functions to operate there as well. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2016-11-29ARM: mm: fix set_memory_*() bounds checksRussell King1-13/+13
The set_memory_*() bounds checks are buggy on several fronts: 1. They fail to round the region size up if the passed address is not page aligned. 2. The region check was incomplete, and didn't correspond with what was being asked of apply_to_page_range() So, rework change_memory_common() to fix these problems, adding an "in_region()" helper to determine whether the start & size fit within the provided region start and stop addresses. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2016-11-15ARM: 8623/1: mm: add ARM_L1_CACHE_SHIFT_7 for UniPhier outer cacheMasahiro Yamada1-1/+7
The UniPhier outer cache (arch/arm/mm/cache-uniphier.c) has 128 byte line length and its tags are also managed per 128 byte line. This is very unfortunate, but the current 64 byte alignment for kmalloc() causes sharing problems on DMA if used with this outer cache. This commit adds ARM_L1_CACHE_SHIFT_7 to increase the DMA minimum alignment to 128 byte if CACHE_UNIPHIER is enabled. There are several drivers that assume aligning to L1_CACHE_BYTES will be DMA safe, so this commit also changes the L1_CACHE_BYTES for safety. Having said that, I hesitate to align all the other SoCs in Multi platform to the UniPhier's requirement. So, I am disabling the CONFIG_CACHE_UNIPHIER by default, so that multi_v7_defconfig will still stay with CONFIG_ARM_L1_CACHE_SHIFT=6. With this commit, UniPhier SoCs will become slower, but it is much better than system crash. If desired, the outer-cache can be enabled by merge_config or something. Note: The UniPhier PH1-Pro5 SoC is equipped also with L3 cache with 256 byte line size but its tags are managed per 128 byte sub-line. So, ARM_L1_CACHE_SHIFT_7 should be fine for all the UniPhier SoCs. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-11-15ARM: 8628/1: dma-mapping: preallocate DMA-debug hash tables in core_initcallMarek Szyprowski1-1/+1
fs_initcall is definitely too late to initialize DMA-debug hash tables, because some drivers might get probed and use DMA mapping framework already in core_initcall. Late initialization of DMA-debug results in false warning about accessing memory, that was not allocated, like this one: ------------[ cut here ]------------ WARNING: CPU: 5 PID: 1 at lib/dma-debug.c:1104 check_unmap+0xa1c/0xe50 exynos-sysmmu 10a60000.sysmmu: DMA-API: device driver tries to free DMA memory it has not allocated [device address=0x000000006ebd0000] [size=16384 bytes] Modules linked in: CPU: 5 PID: 1 Comm: swapper/0 Not tainted 4.9.0-rc5-00028-g39dde3d-dirty #44 Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [<c0119dd4>] (unwind_backtrace) from [<c01122bc>] (show_stack+0x20/0x24) [<c01122bc>] (show_stack) from [<c062714c>] (dump_stack+0x84/0xa0) [<c062714c>] (dump_stack) from [<c0132560>] (__warn+0x14c/0x180) [<c0132560>] (__warn) from [<c01325dc>] (warn_slowpath_fmt+0x48/0x50) [<c01325dc>] (warn_slowpath_fmt) from [<c06814f8>] (check_unmap+0xa1c/0xe50) [<c06814f8>] (check_unmap) from [<c06819c4>] (debug_dma_unmap_page+0x98/0xc8) [<c06819c4>] (debug_dma_unmap_page) from [<c076c3e8>] (exynos_iommu_domain_free+0x158/0x380) [<c076c3e8>] (exynos_iommu_domain_free) from [<c0764a30>] (iommu_domain_free+0x34/0x60) [<c0764a30>] (iommu_domain_free) from [<c011f168>] (release_iommu_mapping+0x30/0xb8) [<c011f168>] (release_iommu_mapping) from [<c011f23c>] (arm_iommu_release_mapping+0x4c/0x50) [<c011f23c>] (arm_iommu_release_mapping) from [<c0b061ac>] (s5p_mfc_probe+0x640/0x80c) [<c0b061ac>] (s5p_mfc_probe) from [<c07e6750>] (platform_drv_probe+0x70/0x148) [<c07e6750>] (platform_drv_probe) from [<c07e25c0>] (driver_probe_device+0x12c/0x6b0) [<c07e25c0>] (driver_probe_device) from [<c07e2c6c>] (__driver_attach+0x128/0x17c) [<c07e2c6c>] (__driver_attach) from [<c07df74c>] (bus_for_each_dev+0x88/0xc8) [<c07df74c>] (bus_for_each_dev) from [<c07e1b6c>] (driver_attach+0x34/0x58) [<c07e1b6c>] (driver_attach) from [<c07e1350>] (bus_add_driver+0x18c/0x32c) [<c07e1350>] (bus_add_driver) from [<c07e4198>] (driver_register+0x98/0x148) [<c07e4198>] (driver_register) from [<c07e5cb0>] (__platform_driver_register+0x58/0x74) [<c07e5cb0>] (__platform_driver_register) from [<c174cb30>] (s5p_mfc_driver_init+0x1c/0x20) [<c174cb30>] (s5p_mfc_driver_init) from [<c0102690>] (do_one_initcall+0x64/0x258) [<c0102690>] (do_one_initcall) from [<c17014c0>] (kernel_init_freeable+0x3d0/0x4d0) [<c17014c0>] (kernel_init_freeable) from [<c116eeb4>] (kernel_init+0x18/0x134) [<c116eeb4>] (kernel_init) from [<c010bbd8>] (ret_from_fork+0x14/0x3c) ---[ end trace dc54c54bd3581296 ]--- This patch moves initialization of DMA-debug to core_initcall. This is safe from the initialization perspective. dma_debug_do_init() internally calls debugfs functions and debugfs also gets initialised at core_initcall(), and that is earlier than arch code in the link order, so it will get initialized just before the DMA-debug. Reported-by: Seung-Woo Kim <sw0312.kim@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-11-15ARM: 8624/1: proc-v7m.S: fix init section nameNicolas Pitre1-1/+1
There is no .text.init sections. Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-10-19ARM: fix oops when using older ARMv4T CPUsRussell King1-10/+24
Alexander Shiyan reports that CLPS711x fails at boot time in the data exception handler due to a NULL pointer dereference. This is caused by the late-v4t abort handler overwriting R9 (which becomes zero). Fix this by making the abort handler save and restore R9. Unable to handle kernel NULL pointer dereference at virtual address 00000008 pgd = c3b58000 [00000008] *pgd=800000000, *pte=00000000, *ppte=feff4140 Internal error: Oops: 63c11817 [#1] PREEMPT ARM CPU: 0 PID: 448 Comm: ash Not tainted 4.8.1+ #1 Hardware name: Cirrus Logic CLPS711X (Device Tree Support) task: c39e03a0 ti: c3b4e000 task.ti: c3b4e000 PC is at __dabt_svc+0x4c/0x60 LR is at do_page_fault+0x144/0x2ac pc : [<c000d3ac>] lr : [<c000fcec>] psr: 60000093 sp : c3b4fe6c ip : 00000001 fp : b6f1bf88 r10: c387a5a0 r9 : 00000000 r8 : e4e0e001 r7 : bee3ef83 r6 : 00100000 r5 : 80000013 r4 : c022fcf8 r3 : 00000000 r2 : 00000008 r1 : bf000000 r0 : 00000000 Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user Control: 0000217f Table: c3b58055 DAC: 00000055 Process ash (pid: 448, stack limit = 0xc3b4e190) Stack: (0xc3b4fe6c to 0xc3b50000) fe60: bee3ef83 c05168d1 ffffffff 00000000 c3adfe80 fe80: c3a03300 00000000 c3b4fed0 c3a03400 bee3ef83 c387a5a0 b6f1bf88 00000001 fea0: c3b4febc 00000076 c022fcf8 80000013 ffffffff 0000003f bf000000 bee3ef83 fec0: 00000004 00000000 c3adfe80 c00e432c 00000812 00000005 00000001 00000006 fee0: b6f1b000 00000000 00010000 0003c944 0004d000 0004d439 00010000 b6f1b000 ff00: 00000005 00000000 00015ecc c3b4fed0 0000000a 00000000 00000000 c00a1dc0 ff20: befff000 c3a03300 c3b4e000 c0507cd8 c0508024 fffffff8 c3a03300 00000000 ff40: c0516a58 c00a35bc c39e03a0 000001c0 bea84ce8 0004e008 c3b3a000 c00a3ac0 ff60: c3b40374 c3b3a000 bea84d11 00000000 c0500188 bea84d11 bea84ce8 00000001 ff80: 0000000b c000a304 c3b4e000 00000000 bea84ce4 c00a3cd0 00000000 bea84d11 ffa0: bea84ce8 c000a160 bea84d11 bea84ce8 bea84d11 bea84ce8 0004e008 0004d450 ffc0: bea84d11 bea84ce8 00000001 0000000b b6f45ee4 00000000 b6f5ff70 bea84ce4 ffe0: b6f2f130 bea84cb0 b6f2f194 b6ef29f4 a0000010 bea84d11 02c7cffa 02c7cffd [<c000d3ac>] (__dabt_svc) from [<c022fcf8>] (__copy_to_user_std+0xf8/0x330) [<c022fcf8>] (__copy_to_user_std) from [<c00e432c>] +(load_elf_binary+0x920/0x107c) [<c00e432c>] (load_elf_binary) from [<c00a35bc>] +(search_binary_handler+0x80/0x16c) [<c00a35bc>] (search_binary_handler) from [<c00a3ac0>] +(do_execveat_common+0x418/0x600) [<c00a3ac0>] (do_execveat_common) from [<c00a3cd0>] (do_execve+0x28/0x30) [<c00a3cd0>] (do_execve) from [<c000a160>] (ret_fast_syscall+0x0/0x30) Code: e1a0200d eb00136b e321f093 e59d104c (e5891008) ---[ end trace 4b4f8086ebef98c5 ]--- Fixes: e6978e4bf181 ("ARM: save and reset the address limit when entering an exception") Reported-by: Alexander Shiyan <shc_work@mail.ru> Tested-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2016-10-11Merge branch 'work.uaccess2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds1-1/+0
Pull uaccess.h prepwork from Al Viro: "Preparations to tree-wide switch to use of linux/uaccess.h (which, obviously, will allow to start unifying stuff for real). The last step there, ie PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ `git grep -l "$PATT"|grep -v ^include/linux/uaccess.h` is not taken here - I would prefer to do it once just before or just after -rc1. However, everything should be ready for it" * 'work.uaccess2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: remove a stray reference to asm/uaccess.h in docs sparc64: separate extable_64.h, switch elf_64.h to it score: separate extable.h, switch module.h to it mips: separate extable.h, switch module.h to it x86: separate extable.h, switch sections.h to it remove stray include of asm/uaccess.h from cacheflush.h mn10300: remove a bogus processor.h->uaccess.h include xtensa: split uaccess.h into C and asm sides bonding: quit messing with IOCTL kill __kernel_ds_p off mn10300: finish verify_area() off frv: move HAVE_ARCH_UNMAPPED_AREA to pgtable.h exceptions: detritus removal
2016-10-07Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds1-60/+3
Pull ARM SoC platform updates from Arnd Bergmann: "These are updates for platform specific code on 32-bit ARM machines, essentially anything that can not (yet) be expressed using DT files. Noteworthy changes include: - We get support for running in big-endian mode on two platforms: sunxi (Allwinner) and s3c24xx (old Samsung). - The recently added Uniphier platform now uses standard PSCI methods for SMP booting and we remove support for old bootloader versions that did not support it yet. - In sunxi, we gain support for the "Nextthing GR8" SoC, which is a close relative of the Allwinner A13 and R8 chips. - PXA completes its move over to the generic dmaengine framework and removes its old private API - mach-bcm gains support for BCM47189/BCM53573, their first ARM SoC with integrated 802.11ac wireless networking" * tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (54 commits) ARM: imx legacy: pca100: move peripheral initialization to .init_late ARM: imx legacy: mx27ads: move peripheral initialization to .init_late ARM: imx legacy: mx21ads: move peripheral initialization to .init_late ARM: imx legacy: pcm043: move peripheral initialization to .init_late ARM: imx legacy: mx35-3ds: move peripheral initialization to .init_late ARM: imx legacy: mx27-3ds: move peripheral initialization to .init_late ARM: imx legacy: imx27-visstrim-m10: move peripheral initialization to .init_late ARM: imx legacy: vpr200: move peripheral initialization to .init_late ARM: imx legacy: mx31moboard: move peripheral initialization to .init_late ARM: imx legacy: armadillo5x0: move peripheral initialization to .init_late ARM: imx legacy: qong: move peripheral initialization to .init_late ARM: imx legacy: mx31-3ds: move peripheral initialization to .init_late ARM: imx legacy: pcm037: move peripheral initialization to .init_late ARM: imx legacy: mx31lilly: move peripheral initialization to .init_late ARM: imx legacy: mx31ads: move peripheral initialization to .init_late ARM: imx legacy: mx31lite: move peripheral initialization to .init_late ARM: imx legacy: kzm: move peripheral initialization to .init_late MAINTAINERS: update list of Oxnas maintainers ARM: orion5x: remove extraneous NO_IRQ ARM: orion: simplify orion_ge00_switch_init ...
2016-10-06Merge tag 'dmaengine-4.9-rc1' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds1-0/+63
Pull dmaengine updates from Vinod Koul: "This is bit large pile of code which bring in some nice additions: - Error reporting: we have added a new mechanism for users of dmaenegine to register a callback_result which tells them the result of the dma transaction. Right now only one user (ntb) is using it. - As we discussed on KS mailing list and pointed out NO_IRQ has no place in kernel, this also remove NO_IRQ from dmaengine subsystem (both arm and ppc users) - Support for IOMMU slave transfers and its implementation for arm. - To get better build coverage, enable COMPILE_TEST for bunch of driver, and fix the warning and sparse complaints on these. - Apart from above, usual updates spread across drivers" * tag 'dmaengine-4.9-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (169 commits) async_pq_val: fix DMA memory leak dmaengine: virt-dma: move function declarations dmaengine: omap-dma: Enable burst and data pack for SG DT: dmaengine: rcar-dmac: document R8A7743/5 support dmaengine: fsldma: Unmap region obtained by of_iomap dmaengine: jz4780: fix resource leaks on error exit return dma-debug: fix ia64 build, use PHYS_PFN dmaengine: coh901318: fix integer overflow when shifting more than 32 places dmaengine: edma: avoid uninitialized variable use dma-mapping: fix m32r build warning dma-mapping: fix ia64 build, use PHYS_PFN dmaengine: ti-dma-crossbar: enable COMPILE_TEST dmaengine: omap-dma: enable COMPILE_TEST dmaengine: edma: enable COMPILE_TEST dmaengine: ti-dma-crossbar: Fix of_device_id data parameter usage dmaengine: ti-dma-crossbar: Correct type for of_find_property() third parameter dmaengine/ARM: omap-dma: Fix the DMAengine compile test on non OMAP configs dmaengine: edma: Rename set_bits and remove unused clear_bits helper dmaengine: edma: Use correct type for of_find_property() third parameter dmaengine: edma: Fix of_device_id data parameter usage (legacy vs TPCC) ...
2016-10-06Merge branches 'misc' and 'sa1111-base' into for-linusRussell King2-6/+18
2016-09-27exceptions: detritus removalAl Viro1-1/+0
externs and defines for stuff that is never used Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-09-26arm: dma-mapping: add {map,unmap}_resource for iommu opsNiklas Söderlund1-0/+63
Add methods to map/unmap device resources addresses for dma_map_ops that are IOMMU aware. This is needed to map a device MMIO register from a physical address. Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-20Merge tag 'uniphier-soc-v4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-uniphier into next/socArnd Bergmann1-60/+3
Pull "UniPhier ARM SoC updates for v4.9" from Masahiro Yamada: * Remove unneeded SMP code * tag 'uniphier-soc-v4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-uniphier: ARM: uniphier: remove SoC-specific SMP code
2016-09-12ARM: 8612/1: LPAE: initialize cache policy correctlyStefan Agner1-1/+1
The cachepolicy variable gets initialized using a masked pmd value. So far, the pmd has been masked with flags valid for the 2-page table format, but the 3-page table format requires a different mask. On LPAE, this lead to a wrong assumption of what initial cache policy has been used. Later a check forces the cache policy to writealloc and prints the following warning: Forcing write-allocate cache policy for SMP This patch introduces a new definition PMD_SECT_CACHE_MASK for both page table formats which masks in all cache flags in both cases. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-09-06ARM: 8611/1: l2x0: add PMU supportMark Rutland4-0/+598
The L2C-220 (AKA L220) and L2C-310 (AKA PL310) cache controllers feature a Performance Monitoring Unit (PMU), which can be useful for tuning and/or debugging. This hardware is always present and the relevant registers are accessible to non-secure accesses. Thus, no special firmware interface is necessary. This patch adds support for the PMU, plugging into the usual perf infrastructure. The overflow interrupt is not always available (e.g. on RealView PBX A9 it is not wired up at all), and the hardware counters saturate, so the driver does not make use of this. Instead, the driver periodically polls and reset counters as required to avoid losing events due to saturation. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Pawel Moll <pawel.moll@arm.com> Tested-by: Kim Phillips <kim.phillips@arm.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-09-06ARM: 8610/1: V7M: Add dsb before jumping in handler modeTorgue Alexandre1-0/+1
According to ARM AN321 (section 4.12): "If the vector table is in writable memory such as SRAM, either relocated by VTOR or a device dependent memory remapping mechanism, then architecturally a memory barrier instruction is required after the vector table entry is updated, and if the exception is to be activated immediately" Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com> Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com> Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-09-06ARM: 8609/1: V7M: Add support for the Cortex-M7 processorJonathan Austin1-0/+56
Cortex-M7 is a new member of the V7M processor family that adds, among other things, caches over the features available in Cortex-M4. This patch adds support for recognising the processor at boot time, and make use of recently introduced cache functions. Signed-off-by: Jonathan Austin <jonathan.austin@arm.com> Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Tested-by: Andras Szemzo <sza@esh.hu> Tested-by: Joachim Eastwood <manabian@gmail.com> Tested-by: Alexandre TORGUE <alexandre.torgue@st.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-09-06ARM: 8608/1: V7M: Indirect proc_info construction for V7M CPUsJonathan Austin1-11/+35
This patch copies the method used for V7A/R CPUs to specify differing processor info for different cores. This patch differentiates Cortex-M3 and Cortex-M4 and leaves a fallback case for any other V7M processors. Signed-off-by: Jonathan Austin <jonathan.austin@arm.com> Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Tested-by: Andras Szemzo <sza@esh.hu> Tested-by: Joachim Eastwood <manabian@gmail.com> Tested-by: Alexandre TORGUE <alexandre.torgue@st.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-09-06ARM: 8607/1: V7M: Wire up caches for V7M processors with cache support.Jonathan Austin3-6/+11
This patch does the plumbing required to invoke the V7M cache code added in earlier patches in this series, although there is no users for that yet. In order to honour the I/D cache disable config options, this patch changes the mechanism by which the CCR is set on boot, to be more like V7A/R. Signed-off-by: Jonathan Austin <jonathan.austin@arm.com> Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Tested-by: Andras Szemzo <sza@esh.hu> Tested-by: Joachim Eastwood <manabian@gmail.com> Tested-by: Alexandre TORGUE <alexandre.torgue@st.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-09-06ARM: 8606/1: V7M: introduce cache operationsVladimir Murzin2-0/+469
This commit implements the cache operation for V7M. It is based on V7 counterpart and differs as follows: - cache operations are memory mapped - only Thumb instruction set is supported - we don't handle user access faults Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Tested-by: Andras Szemzo <sza@esh.hu> Tested-by: Joachim Eastwood <manabian@gmail.com> Tested-by: Alexandre TORGUE <alexandre.torgue@st.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-08-29ARM: uniphier: remove SoC-specific SMP codeMasahiro Yamada1-60/+3
The UniPhier architecture (32bit) switched over to PSCI. Remove the SoC-specific SMP operations. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-08-23ARM: 8599/1: mm: pull asm/memory.h explicitlyVladimir Murzin1-0/+1
Commit d78114554939a (""ARM: 8512/1: proc-v7.S: Adjust stack address when XIP_KERNEL"") introduced a macro which lives under asm/memory.h. Unfortunately, for MMU-less systems (like R-class) it leads to build failure: arch/arm/mm/proc-v7.S: Assembler messages: arch/arm/mm/proc-v7.S:538: Error: unrecognised relocation suffix make[1]: *** [arch/arm/mm/proc-v7.o] Error 1 make: *** [arch/arm/mm] Error 2 since it is implicitly pulled via asm/pgtable.h for MMU capable systems only. To fix it include asm/memory.h explicitly. Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-08-12ARM: 8595/2: apply more __ro_after_initKees Cook1-1/+1
Guided by grsecurity's analogous __read_only markings in arch/arm, this applies several uses of __ro_after_init to structures that are only updated during __init. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-08-12ARM: 8593/1: cache-l2x0.c: Do not clear bit 23 in prefetch control registerAndrey Smirnov1-5/+2
As per L2C-310 TRM[1]: "... You can control this feature using bits 30,27 and 23 of the Prefetch Control Register. Bit 23 and 27 are only used if you set bit 30 HIGH..." which means there is no need to clear bit 23 if bit 30 is being cleared. [1] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0246e/CJAJACBJ.html Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-08-12ARM: 8592/1: cache-l2x0.c: Replace magic numbersAndrey Smirnov1-2/+4
Replace magic numbers used for L310 Prefetch Control Register Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-08-12ARM: 8587/1: dma-mapping: Use %zu for printing a size_t variableFabio Estevam1-2/+2
According to Documentation/printk-formats.txt when printing a size_t variable we should use %zu or %zx format specifiers. As we are printing a memory size value, we should better use %zu in this case. Reported-by: Frank Mori Hess <fmh6jj@gmail.com> Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-08-09ARM: 8591/1: mm: use fully constructed struct pages for EFI pgd allocationsArd Biesheuvel1-1/+2
The late_alloc() PTE allocation function used by create_mapping_late() does not call pgtable_page_ctor() on PTE pages it allocates, leaving the per-page spinlock uninitialized. Since generic page table manipulation code may assume that translation table pages that are not owned by init_mm are covered by fully constructed struct pages, the following crash may occur with the new UEFI memory attributes table code. efi: memattr: Processing EFI Memory Attributes table: efi: memattr: 0x0000ffa16000-0x0000ffa82fff [Runtime Code |RUN| | |XP| | | | | | | | ] Unable to handle kernel NULL pointer dereference at virtual address 00000010 pgd = c0204000 [00000010] *pgd=00000000 Internal error: Oops: 5 [#1] SMP ARM Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.7.0-rc4-00063-g3882aa7b340b #361 Hardware name: Generic DT based system task: ed858000 ti: ed842000 task.ti: ed842000 PC is at __lock_acquire+0xa0/0x19a8 ... [<c038c830>] (__lock_acquire) from [<c038e4f8>] (lock_acquire+0x6c/0x88) [<c038e4f8>] (lock_acquire) from [<c0c06134>] (_raw_spin_lock+0x2c/0x3c) [<c0c06134>] (_raw_spin_lock) from [<c0410384>] (apply_to_page_range+0xe8/0x238) [<c0410384>] (apply_to_page_range) from [<c1205f34>] (efi_set_mapping_permissions+0x54/0x5c) [<c1205f34>] (efi_set_mapping_permissions) from [<c1247474>] (efi_memattr_apply_permissions+0x2b8/0x378) [<c1247474>] (efi_memattr_apply_permissions) from [<c1248258>] (arm_enable_runtime_services+0x1f0/0x22c) [<c1248258>] (arm_enable_runtime_services) from [<c0301f0c>] (do_one_initcall+0x44/0x174) [<c0301f0c>] (do_one_initcall) from [<c1200d10>] (kernel_init_freeable+0x90/0x1e8) [<c1200d10>] (kernel_init_freeable) from [<c0bff690>] (kernel_init+0x8/0x114) [<c0bff690>] (kernel_init) from [<c0307ed0>] (ret_from_fork+0x14/0x24) The crash is due to the fact that the UEFI page tables are not owned by init_mm, but are not covered by fully constructed struct pages. Given that the UEFI subsystem is currently the only user of create_mapping_late(), add an unconditional call to pgtable_page_ctor() to late_alloc(). Fixes: 9fc68b717c24 ("ARM/efi: Apply strict permissions for UEFI Runtime Services regions") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-08-09ARM: 8590/1: sanity_check_meminfo(): avoid overflow on vmalloc_limitNicolas Pitre1-4/+14
To limit the amount of mapped low memory, we determine a physical address boundary based on the start of the vmalloc area using __pa(). Strictly speaking, the vmalloc area location is arbitrary and does not necessarily corresponds to a valid physical address. For example, if PAGE_OFFSET = 0x80000000 PHYS_OFFSET = 0x90000000 vmalloc_min = 0xf0000000 then __pa(vmalloc_min) overflows and returns a wrapped 0 when phys_addr_t is a 32-bit type. Then the code that follows determines that the entire physical memory is above that boundary and no low memory gets mapped at all: |[...] |Machine model: Freescale i.MX51 NA04 Board |Ignoring RAM at 0x90000000-0xb0000000 (!CONFIG_HIGHMEM) |Consider using a HIGHMEM enabled kernel. To avoid this problem let's make vmalloc_limit a 64-bit value all the time and determine that boundary explicitly without using __pa(). Reported-by: Emil Renner Berthing <kernel@esmil.dk> Signed-off-by: Nicolas Pitre <nico@linaro.org> Tested-by: Emil Renner Berthing <kernel@esmil.dk> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-08-04dma-mapping: use unsigned long for dma_attrsKrzysztof Kozlowski1-66/+63
The dma-mapping core and the implementations do not change the DMA attributes passed by pointer. Thus the pointer can point to const data. However the attributes do not have to be a bitfield. Instead unsigned long will do fine: 1. This is just simpler. Both in terms of reading the code and setting attributes. Instead of initializing local attributes on the stack and passing pointer to it to dma_set_attr(), just set the bits. 2. It brings safeness and checking for const correctness because the attributes are passed by value. Semantic patches for this change (at least most of them): virtual patch virtual context @r@ identifier f, attrs; @@ f(..., - struct dma_attrs *attrs + unsigned long attrs , ...) { ... } @@ identifier r.f; @@ f(..., - NULL + 0 ) and // Options: --all-includes virtual patch virtual context @r@ identifier f, attrs; type t; @@ t f(..., struct dma_attrs *attrs); @@ identifier r.f; @@ f(..., - NULL + 0 ) Link: http://lkml.kernel.org/r/1468399300-5399-2-git-send-email-k.kozlowski@samsung.com Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: Robin Murphy <robin.murphy@arm.com> Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> Acked-by: Mark Salter <msalter@redhat.com> [c6x] Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> [cris] Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> [drm] Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> Acked-by: Joerg Roedel <jroedel@suse.de> [iommu] Acked-by: Fabien Dessenne <fabien.dessenne@st.com> [bdisp] Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com> [vb2-core] Acked-by: David Vrabel <david.vrabel@citrix.com> [xen] Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> [xen swiotlb] Acked-by: Joerg Roedel <jroedel@suse.de> [iommu] Acked-by: Richard Kuo <rkuo@codeaurora.org> [hexagon] Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k] Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> [s390] Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> [avr32] Acked-by: Vineet Gupta <vgupta@synopsys.com> [arc] Acked-by: Robin Murphy <robin.murphy@arm.com> [arm64 and dma-iommu] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-29Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds1-14/+13
Pull smp hotplug updates from Thomas Gleixner: "This is the next part of the hotplug rework. - Convert all notifiers with a priority assigned - Convert all CPU_STARTING/DYING notifiers The final removal of the STARTING/DYING infrastructure will happen when the merge window closes. Another 700 hundred line of unpenetrable maze gone :)" * 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (70 commits) timers/core: Correct callback order during CPU hot plug leds/trigger/cpu: Move from CPU_STARTING to ONLINE level powerpc/numa: Convert to hotplug state machine arm/perf: Fix hotplug state machine conversion irqchip/armada: Avoid unused function warnings ARC/time: Convert to hotplug state machine clocksource/atlas7: Convert to hotplug state machine clocksource/armada-370-xp: Convert to hotplug state machine clocksource/exynos_mct: Convert to hotplug state machine clocksource/arm_global_timer: Convert to hotplug state machine rcu: Convert rcutree to hotplug state machine KVM/arm/arm64/vgic-new: Convert to hotplug state machine smp/cfd: Convert core to hotplug state machine x86/x2apic: Convert to CPU hotplug state machine profile: Convert to hotplug state machine timers/core: Convert to hotplug state machine hrtimer: Convert to hotplug state machine x86/tboot: Convert to hotplug state machine arm64/armv8 deprecated: Convert to hotplug state machine hwtracing/coresight-etm4x: Convert to hotplug state machine ...
2016-07-29Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-armLinus Torvalds3-45/+148
Pull ARM updates from Russell King: "Included in this update are: - Patches from Gregory Clement to fix the coherent DMA cases in our dma-mapping code. - A number of CPU errata updates and fixes. - ARM cpuidle improvements from Jisheng Zhang. - Fix from Kees for the location of _etext. - Cleanups from Masahiro Yamada to avoid duplicated messages during the kernel build, and remove CONFIG_ARCH_HAS_BARRIERS. - Remove a udelay loop limitation, allowing for faster CPUs to calibrate the delay correctly. - Cleanup some left-overs from the SW PAN implementation. - Ensure that a modified address limit is not visible to exception handlers" * 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (21 commits) ARM: 8586/1: cpuidle: make arm_cpuidle_suspend() a bit more efficient ARM: 8585/1: cpuidle: fix !cpuidle_ops[cpu].init case during init ARM: 8561/4: dma-mapping: Fix the coherent case when iommu is used ARM: 8561/3: dma-mapping: Don't use outer_flush_range when the L2C is coherent ARM: 8560/1: errata: Workaround errata A12 825619 / A17 852421 ARM: 8559/1: errata: Workaround erratum A12 821420 ARM: 8558/1: errata: Workaround errata A12 818325/852422 A17 852423 ARM: save and reset the address limit when entering an exception ARM: 8577/1: Fix Cortex-A15 798181 errata initialization ARM: 8584/1: floppy: avoid gcc-6 warning ARM: 8583/1: mm: fix location of _etext ARM: 8582/1: remove unused CONFIG_ARCH_HAS_BARRIERS ARM: 8306/1: loop_udelay: remove bogomips value limitation ARM: 8581/1: add missing <asm/prom.h> to arch/arm/kernel/devtree.c ARM: 8576/1: avoid duplicating "Kernel: arch/arm/boot/*Image is ready" ARM: 8556/1: on a generic DT system: do not touch l2x0 ARM: uaccess: remove put_user() code duplication ARM: 8580/1: Remove orphaned __addr_ok() definition ARM: get rid of horrible *(unsigned int *)(regs + 1) ARM: introduce svc_pt_regs structure ...
2016-07-26mm: do not pass mm_struct into handle_mm_faultKirill A. Shutemov1-1/+1
We always have vma->vm_mm around. Link: http://lkml.kernel.org/r/1466021202-61880-8-git-send-email-kirill.shutemov@linux.intel.com Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-26arm: get rid of superfluous __GFP_REPEATMichal Hocko1-1/+1
__GFP_REPEAT has a rather weak semantic but since it has been introduced around 2.6.12 it has been ignored for low order allocations. PGALLOC_GFP uses __GFP_REPEAT but none of the allocation which uses this flag is for more than order-2. This means that this flag has never been actually useful here because it has always been used only for PAGE_ALLOC_COSTLY requests. Link: http://lkml.kernel.org/r/1464599699-30131-5-git-send-email-mhocko@kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-15arm/l2c: Convert to hotplug state machineRichard Cochran1-14/+13
Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. Signed-off-by: Richard Cochran <rcochran@linutronix.de> Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Brad Mouring <brad.mouring@ni.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rob Herring <robh@kernel.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-arm-kernel@lists.infradead.org Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20160713153336.801270887@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-14ARM: 8561/4: dma-mapping: Fix the coherent case when iommu is usedGregory CLEMENT1-21/+65
When doing dma allocation with IOMMU the __iommu_alloc_atomic() was used even when the system was coherent. However, this function allocates from a non-cacheable pool, which is fine when the device is not cache coherent but won't work as expected in the device is cache coherent. Indeed, the CPU and device must access the memory using the same cacheability attributes. Moreover when the devices are coherent, the mmap call must not change the pg_prot flags in the vma struct. The arm_coherent_iommu_mmap_attrs has been updated in the same way that it was done for the arm_dma_mmap in commit 55af8a91640d ("ARM: 8387/1: arm/mm/dma-mapping.c: Add arm_coherent_dma_mmap"). Suggested-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-07-14ARM: 8561/3: dma-mapping: Don't use outer_flush_range when the L2C is coherentGregory CLEMENT1-20/+42
When a L2 cache controller is used in a system that provides hardware coherency, the entire outer cache operations are useless, and can be skipped. Moreover, on some systems, it is harmful as it causes deadlocks between the Marvell coherency mechanism, the Marvell PCIe controller and the Cortex-A9. In the current kernel implementation, the outer cache flush range operation is triggered by the dma_alloc function. This operation can be take place during runtime and in some circumstances may lead to the PCIe/PL310 deadlock on Armada 375/38x SoCs. This patch extends the __dma_clear_buffer() function to receive a boolean argument related to the coherency of the system. The same things is done for the calling functions. Reported-by: Nadav Haklai <nadavh@marvell.com> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Cc: <stable@vger.kernel.org> # v3.16+ Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-07-14ARM: 8560/1: errata: Workaround errata A12 825619 / A17 852421Doug Anderson1-0/+11
The workaround for both errata is to set bit 24 in the diagnostic register. There are no known end-user bugs solved by fixing this errata, but the fix is trivial and it seems sane to apply it. The arguments for why this needs to be in the kernel are similar to the arugments made in the patch "Workaround errata A12 818325/852422 A17 852423". Signed-off-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.