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* earlycon: Use a pointer table to fix __earlycon_table strideDaniel Kurtz2018-04-231-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 99492c39f39f ("earlycon: Fix __earlycon_table stride") tried to fix __earlycon_table stride by forcing the earlycon_id struct alignment to 32 and asking the linker to 32-byte align the __earlycon_table symbol. This fix was based on commit 07fca0e57fca92 ("tracing: Properly align linker defined symbols") which tried a similar fix for the tracing subsystem. However, this fix doesn't quite work because there is no guarantee that gcc will place structures packed into an array format. In fact, gcc 4.9 chooses to 64-byte align these structs by inserting additional padding between the entries because it has no clue that they are supposed to be in an array. If we are unlucky, the linker will assign symbol "__earlycon_table" to a 32-byte aligned address which does not correspond to the 64-byte aligned contents of section "__earlycon_table". To address this same problem, the fix to the tracing system was subsequently re-implemented using a more robust table of pointers approach by commits: 3d56e331b653 ("tracing: Replace syscall_meta_data struct array with pointer array") 654986462939 ("tracepoints: Fix section alignment using pointer array") e4a9ea5ee7c8 ("tracing: Replace trace_event struct array with pointer array") Let's use this same "array of pointers to structs" approach for EARLYCON_TABLE. Fixes: 99492c39f39f ("earlycon: Fix __earlycon_table stride") Signed-off-by: Daniel Kurtz <djkurtz@chromium.org> Suggested-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Rob Herring <robh@kernel.org> Tested-by: Guenter Roeck <groeck@chromium.org> Reviewed-by: Guenter Roeck <groeck@chromium.org> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* of/fdt: use memblock_virt_alloc for early allocRob Herring2018-01-081-12/+4
| | | | | | | | | | | | | | | | | | | | memblock_virt_alloc() works for both memblock and bootmem, so use it and make early_init_dt_alloc_memory_arch a static function. The arches using bootmem define early_init_dt_alloc_memory_arch as either: __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS)) or: alloc_bootmem_align(size, align) Both of these evaluate to the same thing as does memblock_virt_alloc for bootmem. So we can disable the arch specific functions by making early_init_dt_alloc_memory_arch static and they can be removed in subsequent commits. Cc: Frank Rowand <frowand.list@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
* of: Use SPDX license tag for DT filesRob Herring2018-01-081-4/+1
| | | | | | | | | | | | Convert remaining DT files to use SPDX-License-Identifier tags. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com> Reviewed-by: Frank Rowand <frank.rowand@sony.com> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Rob Herring <robh@kernel.org>
* of/fdt: Document detached argument to __unflatten_device_tree()Stephen Boyd2017-10-161-0/+1
| | | | | | | | This wasn't documented. Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org> Reviewed-by: Frank Rowand <frowand.list@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
* of/fdt: skip unflattening of disabled nodesRob Herring2017-10-161-0/+4
| | | | | | | | | | | | | | For static DT usecases, we don't need the disabled nodes and can skip unflattening. This saves a significant amount of RAM in memory constrained cases. In one example on STM32F469, the RAM usage goes from 118K to 26K. There are a few cases in the kernel that modify the status property dynamically. These all are changes from enabled to disabled, depend on OF_DYNAMIC or are not FDT based (PDT based). Tested-by: Nicolas Pitre <nico@linaro.org> Reviewed-by: Frank Rowand <frowand.list@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
* of/fdt: add of_fdt_device_is_available functionRob Herring2017-10-161-3/+14
| | | | | | | | | Add an equivalent function to of_device_is_available for flattened DT, and convert the one existing open coded occurrence. Tested-by: Nicolas Pitre <nico@linaro.org> Reviewed-by: Frank Rowand <frowand.list@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
* of/fdt: only store the device node basename in full_nameRob Herring2017-10-031-58/+11
| | | | | | | | | | | | | | | | | | | | | With dependencies on a statically allocated full path name converted to use %pOF format specifier, we can store just the basename of node, and the unflattening of the FDT can be simplified. This commit will affect the remaining users of full_name. After analyzing these users, the remaining cases should only change some print messages. The main users of full_name are providing a name for struct resource. The resource names shouldn't be important other than providing /proc/iomem names. We no longer distinguish between pre and post 0x10 dtb formats as either a full path or basename will work. However, less than 0x10 formats have been broken since the conversion to use libfdt (and no one has cared). The conversion of the unflattening code to be non-recursive also broke pre 0x10 formats as the populate_node function would return 0 in that case. Signed-off-by: Rob Herring <robh@kernel.org>
* Merge tag 'devicetree-for-4.13' of ↵Linus Torvalds2017-07-071-2/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull DeviceTree updates from Rob Herring: - vsprintf format specifier %pOF for device_node's. This will enable us to stop storing the full node names. Conversion of users will happen next cycle. - Update documentation to point to DT specification instead of ePAPR. - Split out graph and property functions to a separate file. - New of-graph functions for ALSA - Add vendor prefixes for RISC-V, Linksys, iWave Systems, Roofull, Itead, and BananaPi. - Improve dtx_diff utility filename printing. * tag 'devicetree-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (32 commits) of: document /sys/firmware/fdt dt-bindings: Add RISC-V vendor prefix vsprintf: Add %p extension "%pOF" for device tree of: find_node_by_full_name rewrite to compare each level of: use kbasename instead of open coding dt-bindings: thermal: add file extension to brcm,ns-thermal of: update ePAPR references to point to Devicetree Specification scripts/dtc: dtx_diff - Show real file names in diff header of: detect invalid phandle in overlay of: be consistent in form of file mode of: make __of_attach_node() static of: address.c header comment typo of: fdt.c header comment typo of: make of_fdt_is_compatible() static dt-bindings: display-timing.txt convert non-ascii characters to ascii Documentation: remove overlay-notes reference to non-existent file dt-bindings: usb: exynos-usb: Add missing required VDD properties dt-bindings: Add vendor prefix for Linksys MAINTAINERS: add device tree ABI documentation file of: Add vendor prefix for iWave Systems Technologies Pvt. Ltd ...
| * of: fdt.c header comment typoFrank Rowand2017-06-221-1/+1
| | | | | | | | | | | | | | Fix typo in header comment for early_init_dt_scan_memory() Signed-off-by: Frank Rowand <frank.rowand@sony.com> Signed-off-by: Rob Herring <robh@kernel.org>
| * of: make of_fdt_is_compatible() staticFrank Rowand2017-06-221-1/+1
| | | | | | | | | | | | | | | | The callers of of_fdt_is_compatible() are all in fdt.c so make it static. Signed-off-by: Frank Rowand <frank.rowand@sony.com> Signed-off-by: Rob Herring <robh@kernel.org>
* | Merge tag 'devicetree-fixes-for-4.12' of ↵Linus Torvalds2017-05-201-0/+3
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull DeviceTree fixes from Rob Herring: - fix missing allocation failure handling in fdt code - fix dtc compile error on 32-bit hosts - revert bad sparse changes causing GCC7 warnings * tag 'devicetree-fixes-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: of: fdt: add missing allocation-failure check dtc: check.c fix compile error Partially Revert "of: fix sparse warnings in fdt, irq, reserved mem, and resolver code"
| * of: fdt: add missing allocation-failure checkJohan Hovold2017-05-171-0/+3
| | | | | | | | | | | | | | | | | | | | | | The memory allocator passed to __unflatten_device_tree() (e.g. a wrapped kzalloc) can fail so add the missing sanity check to avoid dereferencing a NULL pointer. Fixes: fe14042358fa ("of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree") Cc: stable <stable@vger.kernel.org> # 2.6.38 Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Rob Herring <robh@kernel.org>
* | Merge tag 'powerpc-4.12-2' of ↵Linus Torvalds2017-05-121-0/+38
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull more powerpc updates from Michael Ellerman: "The change to the Linux page table geometry was delayed for more testing with 16G pages, and there's the new CPU features stuff which just needed one more polish before going in. Plus a few changes from Scott which came in a bit late. And then various fixes, mostly minor. Summary highlights: - rework the Linux page table geometry to lower memory usage on 64-bit Book3S (IBM chips) using the Hash MMU. - support for a new device tree binding for discovering CPU features on future firmwares. - Freescale updates from Scott: "Includes a fix for a powerpc/next mm regression on 64e, a fix for a kernel hang on 64e when using a debugger inside a relocated kernel, a qman fix, and misc qe improvements." Thanks to: Christophe Leroy, Gavin Shan, Horia Geantă, LiuHailong, Nicholas Piggin, Roy Pledge, Scott Wood, Valentin Longchamp" * tag 'powerpc-4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/64s: Support new device tree binding for discovering CPU features powerpc: Don't print cpu_spec->cpu_name if it's NULL of/fdt: introduce of_scan_flat_dt_subnodes and of_get_flat_dt_phandle powerpc/64s: Fix unnecessary machine check handler relocation branch powerpc/mm/book3s/64: Rework page table geometry for lower memory usage powerpc: Fix distclean with Makefile.postlink powerpc/64e: Don't place the stack beyond TASK_SIZE powerpc/powernv: Block PCI config access on BCM5718 during EEH recovery powerpc/8xx: Adding support of IRQ in MPC8xx GPIO soc/fsl/qbman: Disable IRQs for deferred QBMan work soc/fsl/qe: add EXPORT_SYMBOL for the 2 qe_tdm functions soc/fsl/qe: only apply QE_General4 workaround on affected SoCs soc/fsl/qe: round brg_freq to 1kHz granularity soc/fsl/qe: get rid of immrbar_virt_to_phys() net: ethernet: ucc_geth: fix MEM_PART_MURAM mode powerpc/64e: Fix hang when debugging programs with relocated kernel
| * of/fdt: introduce of_scan_flat_dt_subnodes and of_get_flat_dt_phandleNicholas Piggin2017-05-091-0/+38
| | | | | | | | | | | | | | | | | | | | | | Introduce primitives for FDT parsing. These will be used for powerpc cpufeatures node scanning, which has quite complex structure but should be processed early. Cc: devicetree@vger.kernel.org Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* | of: fix sparse warnings in fdt, irq, reserved mem, and resolver codeRob Herring2017-05-041-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sparse generates the following warnings in drivers/of/: ../drivers/of/fdt.c:63:36: warning: cast to restricted __be32 ../drivers/of/fdt.c:68:33: warning: cast to restricted __be32 ../drivers/of/irq.c:105:88: warning: incorrect type in initializer (different base types) ../drivers/of/irq.c:105:88: expected restricted __be32 ../drivers/of/irq.c:105:88: got int ../drivers/of/irq.c:526:35: warning: incorrect type in assignment (different modifiers) ../drivers/of/irq.c:526:35: expected int ( *const [usertype] irq_init_cb )( ... ) ../drivers/of/irq.c:526:35: got void const *const data ../drivers/of/of_reserved_mem.c:200:50: warning: incorrect type in initializer (different modifiers) ../drivers/of/of_reserved_mem.c:200:50: expected int ( *[usertype] initfn )( ... ) ../drivers/of/of_reserved_mem.c:200:50: got void const *const data ../drivers/of/resolver.c:95:42: warning: incorrect type in assignment (different base types) ../drivers/of/resolver.c:95:42: expected unsigned int [unsigned] [usertype] <noident> ../drivers/of/resolver.c:95:42: got restricted __be32 [usertype] <noident> All these are harmless type mismatches fixed by adjusting the types. Signed-off-by: Rob Herring <robh@kernel.org>
* | of: Add unit tests for applying overlaysFrank Rowand2017-04-281-5/+9
|/ | | | | | | | Existing overlay unit tests examine individual pieces of the overlay code. The new tests target the entire process of applying an overlay. Signed-off-by: Frank Rowand <frank.rowand@sony.com> Signed-off-by: Rob Herring <robh@kernel.org>
* Merge tag 'devicetree-for-4.11' of ↵Linus Torvalds2017-02-231-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull DeviceTree updates from Rob Herring: "Pretty standard stuff with dtc upstream sync being the biggest piece. - Sync dtc to upstream commit 0931cea3ba20. This picks up overlay support in dtc. - Set dma_ops for reserved memory users. - Make references to IOMMU consistent in DT bindings. - Cleanup references to pm_power_off in bindings. - Move some display bindings that snuck into the old bindings/video/ path. - Fix some wrong documentation paths caused from binding restructuring. - Vendor prefixes for Faraday and Fujitsu. - Fix an of_node ref counting leak in of_find_node_opts_by_path - Introduce new graph helper of_graph_get_remote_node() which will be used by DRM drivers in 4.12" * tag 'devicetree-for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (27 commits) DT: add Faraday Tec. as vendor of: introduce of_graph_get_remote_node of: Add missing space at end of pr_fmt(). of: make of_device_make_bus_id() static of: fix of_node leak caused in of_find_node_opts_by_path dt-bindings: net: remove reference to fixed link support dt-bindings: power: reset: qnap-poweroff: Drop reference to pm_power_off dt-bindings: power: reset: gpio-poweroff: Drop reference to pm_power_off dt-bindings: mfd: as3722: Drop reference to pm_power_off dt-bindings: display: move ANX7814 and SiI8620 bridge bindings of/unittest: Swap arguments of of_unittest_apply_overlay() Documentation: usb: fix wrong documentation paths serial: fsl-imx-uart.txt: Remove generic property devicetree: Add Fujitsu Ltd. vendor prefix Documentation: display: fix wrong documentation paths of: remove redundant memset in overlay bus:qcom : Fix typo in qcom,ebi2.txt dt-bindings: qman: Remove pool channel node Documentation: panel-dpi: fix path to display-timing.txt devicetree: bindings: clk: mvebu: fix description for sata1 on Armada XP ...
| * of: Add missing space at end of pr_fmt().Frank Rowand2017-02-091-1/+1
| | | | | | | | | | | | | | Make pr_fmt() in fdt.c consistent with all other files in drivers/of/ Signed-off-by: Frank Rowand <frank.rowand@am.sony.com> Signed-off-by: Rob Herring <robh@kernel.org>
* | of: Add check to of_scan_flat_dt() before accessing initial_boot_paramsTobias Wolf2017-01-031-3/+6
|/ | | | | | | | | | | | An empty __dtb_start to __dtb_end section might result in initial_boot_params being null for arch/mips/ralink. This showed that the boot process hangs indefinitely in of_scan_flat_dt(). Signed-off-by: Tobias Wolf <dev-NTEO@vplace.de> Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14605/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* of/fdt: mark hotpluggable memoryReza Arbab2016-12-131-0/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When movable nodes are enabled, any node containing only hotpluggable memory is made movable at boot time. On x86, hotpluggable memory is discovered by parsing the ACPI SRAT, making corresponding calls to memblock_mark_hotplug(). If we introduce a dt property to describe memory as hotpluggable, configs supporting early fdt may then also do this marking and use movable nodes. Link: http://lkml.kernel.org/r/1479160961-25840-5-git-send-email-arbab@linux.vnet.ibm.com Signed-off-by: Reza Arbab <arbab@linux.vnet.ibm.com> Tested-by: Balbir Singh <bsingharora@gmail.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Alistair Popple <apopple@au1.ibm.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Bharata B Rao <bharata@linux.vnet.ibm.com> Cc: Frank Rowand <frowand.list@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Stewart Smith <stewart@linux.vnet.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* of/serial: move earlycon early_param handling to serialLeif Lindholm2016-09-281-10/+1
| | | | | | | | | | | | | | | | | | We have multiple "earlycon" early_param handlers - merge the DT one into the main earlycon one. It's a cleanup that also will be useful to defer setting up DT console until ACPI/DT decision is made. Rename the exported function to avoid clashing with the function from arch/microblaze/kernel/prom.c Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org> Signed-off-by: Aleksey Makarov <aleksey.makarov@linaro.org> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Tested-by: Kefeng Wang <wangkefeng.wang@huawei.com> Tested-by: Christopher Covington <cov@codeaurora.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers/of: Validate device node in __unflatten_device_tree()Gavin Shan2016-08-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | @mynodes is set to NULL when __unflatten_device_tree() is called to unflatten device sub-tree in PCI hot add scenario on PowerPC PowerNV platform. Marking @mynodes detached unconditionally causes kernel crash as below backtrace shows: Unable to handle kernel paging request for data at address 0x00000000 Faulting instruction address: 0xc000000000b26f64 cpu 0x0: Vector: 300 (Data Access) at [c000003fcc7cf740] pc: c000000000b26f64: __unflatten_device_tree+0xf4/0x190 lr: c000000000b26f40: __unflatten_device_tree+0xd0/0x190 sp: c000003fcc7cf9c0 msr: 900000000280b033 dar: 0 dsisr: 40000000 current = 0xc000003fcc281680 paca = 0xc00000000ff00000 softe: 0 irq_happened: 0x01 pid = 2724, comm = sh Linux version 4.7.0-gavin-07754-g92a6836 (gwshan@gwshan) (gcc version \ 4.9.3 (Buildroot 2016.02-rc2-00093-g5ea3bce) ) #539 SMP Mon Aug 1 \ 12:40:29 AEST 2016 enter ? for help [c000003fcc7cfa50] c000000000b27060 of_fdt_unflatten_tree+0x60/0x90 [c000003fcc7cfaa0] c0000000004c6288 pnv_php_set_slot_power_state+0x118/0x440 [c000003fcc7cfb80] c0000000004c6a10 pnv_php_enable+0xc0/0x170 [c000003fcc7cfbd0] c0000000004c4d80 power_write_file+0xa0/0x190 [c000003fcc7cfc50] c0000000004be93c pci_slot_attr_store+0x3c/0x60 [c000003fcc7cfc70] c0000000002d3fd4 sysfs_kf_write+0x94/0xc0 [c000003fcc7cfcb0] c0000000002d2c30 kernfs_fop_write+0x180/0x260 [c000003fcc7cfd00] c000000000230fe0 __vfs_write+0x40/0x190 [c000003fcc7cfd90] c000000000232278 vfs_write+0xc8/0x240 [c000003fcc7cfde0] c000000000233d90 SyS_write+0x60/0x110 [c000003fcc7cfe30] c000000000009524 system_call+0x38/0x108 This avoids the kernel crash by marking @mynodes detached only when @mynodes is dereferencing valid device node in __unflatten_device_tree(). Fixes: 1d1bde550ea3 ("of: fdt: mark unflattened tree as detached") Reported-by: Meng Li <shlimeng@cn.ibm.com> Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Rob Herring <robh@kernel.org>
* Merge tag 'devicetree-for-4.8' of ↵Linus Torvalds2016-07-301-9/+16
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull DeviceTree updates from Rob Herring: - remove most of_platform_populate() calls in arch code. Now the DT core code calls it in the default case and platforms only need to call it if they have special needs - use pr_fmt on all the DT core print statements - CoreSight binding doc improvements to block name descriptions - add dt_to_config script which can parse dts files and list corresponding kernel config options - fix memory leak hit with a PowerMac DT - correct a bunch of STMicro compatible strings to use the correct vendor prefix - fix DA9052 PMIC binding doc to match what is actually used in dts files * tag 'devicetree-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (35 commits) documentation: da9052: Update regulator bindings names to match DA9052/53 DTS expectations xtensa: Partially Revert "xtensa: Remove unnecessary of_platform_populate with default match table" xtensa: Fix build error due to missing include file MIPS: ath79: Add missing include file Fix spelling errors in Documentation/devicetree ARM: dts: fix STMicroelectronics compatible strings powerpc/dts: fix STMicroelectronics compatible strings Documentation: dt: i2c: use correct STMicroelectronics vendor prefix scripts/dtc: dt_to_config - kernel config options for a devicetree of: fdt: mark unflattened tree as detached of: overlay: add resolver error prints coresight: document binding acronyms Documentation/devicetree: document cavium-pip rx-delay/tx-delay properties of: use pr_fmt prefix for all console printing of/irq: Mark initialised interrupt controllers as populated of: fix memory leak related to safe_name() Revert "of/platform: export of_default_bus_match_table" of: unittest: use of_platform_default_populate() to populate default bus memory: omap-gpmc: use of_platform_default_populate() to populate default bus bus: uniphier-system-bus: use of_platform_default_populate() to populate default bus ...
| * of: fdt: mark unflattened tree as detachedMichal Suchanek2016-07-191-3/+10
| | | | | | | | | | | | | | | | | | The tree returned from of_fdt_unflatten_tree cannot be attached to the live tree because it is not marked as detached so mark it as such. The dt resolver checks the flag and refuses to process the tree otherwise. Signed-off-by: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
| * of: use pr_fmt prefix for all console printingRob Herring2016-07-181-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | Clean-up all the DT printk functions to use common pr_fmt prefix. Some print statements such as kmalloc errors were redundant, so just drop those. Cc: Frank Rowand <frowand.list@gmail.com> Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com> Reviewed-by: Frank Rowand <frank.rowand@am.sony.com> Signed-off-by: Rob Herring <robh@kernel.org>
* | FDT: Add a helper to get the subnode by given nameShannon Zhao2016-07-061-0/+13
|/ | | | | | | | | | | Sometimes it needs to check if there is a subnode of given node in FDT by given name. Introduce this helper to get the subnode if it exists. CC: Rob Herring <robh@kernel.org> Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Rob Herring <robh@kernel.org> Tested-by: Julien Grall <julien.grall@arm.com>
* drivers/of: Fix depth for sub-tree blob in unflatten_dt_nodes()Gavin Shan2016-06-091-2/+13
| | | | | | | | | | | | | | | | | | | | | | The function is unflattening device sub-tree blob if @dad passed to the function is valid. Currently, this functionality is used by PPC PowerNV PCI hotplug driver only. There are possibly multiple nodes in the first level of depth, fdt_next_node() bails immediately when @depth becomes negative before the second device node can be probed successfully. It leads to the device nodes except the first one won't be unflattened successfully. This fixes the issue by setting the initial depth (@inital_depth) to 1 when this function is called to unflatten device sub-tree blob. No logic changes when this function is used to unflatten non-sub-tree blob. Cc: Rhyland Klein <rklein@nvidia.com> Fixes: 78c44d910 ("drivers/of: Fix depth when unflattening devicetree") Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Tested-by: Rhyland Klein <rklein@nvidia.com> Tested-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Rob Herring <robh@kernel.org>
* drivers/of: Fix build warning in populate_node()Gavin Shan2016-05-191-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | Function populate_node() is used to unflatten FDT blob to device tree. It supports maximal 64 level of device nodes. There is one array @fpsizes[64] tracking the full name length of last unflattened device node in the corresponding level (index of element in the array - 1). Build warning is seen with CONFIG_FRAME_WARN=1024 like below on ARM64 as Geert reported. The issue can be reproduced on PPC64 as well. $ make drivers/of/fdt.o drivers/of/fdt.c:443:1: warning: the frame size of 1136 bytes is \ larger than 1024 bytes [-Wframe-larger-than=] This changes the data type of @fpsizes[i] from "unsigned long" to "unsigned int" to avoid the build warning. The return value type of populate_node() and its @fpsize argument is adjusted accordingly. With this applied, 256 bytes saved from the stack frame on ARM64 and PPC64 platforms and the above warning isn't seen. Fixes: 50800082f176 ("drivers/of: Avoid recursively calling unflatten_dt_node()") Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Rob Herring <robh@kernel.org>
* drivers/of: Fix depth when unflattening devicetreeRhyland Klein2016-05-191-9/+9
| | | | | | | | | | | | | | | | | | | | | | When the implementation for unflatten_dt_node() changed from being recursive to being non-recursive, it had a side effect of increasing the depth passed to fdt_next_node() by 1. This is fine most of the time, but it seems that when the end of the dtb is being parsed, it will cause the FDT_END condition in fdt_next_node() to return a different value (returning nextoffset instead of -FDT_ERR_NOTFOUND). This ends up passing an FDT_ERR_TRUNCATED error back to the unflatten_dt_node() which then sees that and complains "Error -8 processing FDT" causing boot to fail. This patch simply avoids incrementing depth and uses modified accesses for local array indices so that the depth is the same as it was before the change as far as fdt_next_node() is concerned. This problem was discovered trying to boot Tegra210-Smaug platforms. Fixes: 50800082f176 ("drivers/of: Avoid recursively calling unflatten_dt_node()") Signed-off-by: Rhyland Klein <rklein@nvidia.com> [robh: squashed in KASAN fix from Rhyland] Signed-off-by: Rob Herring <robh@kernel.org>
* drivers/of: Return allocated memory from of_fdt_unflatten_tree()Gavin Shan2016-05-161-11/+22
| | | | | | | | | | This returns the allocate memory chunk, storing the unflattened device tree, from of_fdt_unflatten_tree() so that memory chunk can be released on demand in PowerNV PCI hotplug driver. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Rob Herring <robh@kernel.org>
* drivers/of: Specify parent node in of_fdt_unflatten_tree()Gavin Shan2016-05-161-4/+10
| | | | | | | | | | | | | This adds one more argument to of_fdt_unflatten_tree() to specify the parent node of the FDT blob that is going to be unflattened. In the result, the function can be used to unflatten FDT blob that represents device sub-tree in PowerNV PCI hotplug driver. Cc: Jyri Sarha <jsarha@ti.com> Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Jyri Sarha <jsarha@ti.com> Signed-off-by: Rob Herring <robh@kernel.org>
* drivers/of: Rename unflatten_dt_node()Gavin Shan2016-05-161-7/+7
| | | | | | | | | | This renames unflatten_dt_node() to unflatten_dt_nodes() as it populates multiple device nodes from FDT blob. No logical changes introduced. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Rob Herring <robh@kernel.org>
* drivers/of: Avoid recursively calling unflatten_dt_node()Gavin Shan2016-05-161-48/+74
| | | | | | | | | | | | | | | | | | | | | | | | | In current implementation, unflatten_dt_node() is called recursively to unflatten device nodes in FDT blob. It's stress to limited stack capacity, especially to adopt the function to unflatten device sub-tree that possibly has multiple root nodes. In that case, we runs out of stack and the system can't boot up successfully. In order to reuse the function to unflatten device sub-tree, this avoids calling the function recursively, meaning the device nodes are unflattened in one call on unflatten_dt_node(): two arrays are introduced to track the parent path size and the device node of current level of depth, which will be used by the device node on next level of depth to be unflattened. All device nodes in more than 64 level of depth are dropped and hopefully, the system can boot up successfully with the partial device-tree. Also, the parameter "poffset" and "fpsize" are unused and dropped and the parameter "dryrun" is figured out from "mem == NULL". Besides, the return value of the function is changed to indicate the size of memory consumed by the unflatten device tree or error code. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Rob Herring <robh@kernel.org>
* drivers/of: Split unflatten_dt_node()Gavin Shan2016-05-161-102/+147
| | | | | | | | | | | | | | | | | | The function unflatten_dt_node() is called recursively to unflatten device nodes and properties in the FDT blob. It looks complicated and hard to be understood. This splits the function into 3 functions: populate_properties(), populate_node() and unflatten_dt_node(). populate_properties(), which is called by populate_node(), creates properties for the indicated device node. The later one creates the device nodes from FDT blob. populate_node() gets the offset in FDT blob for next device nodes and then calls populate_node(). No logical changes introduced. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Rob Herring <robh@kernel.org>
* fdt: fix extend of cmd lineMax Uvarov2016-04-201-2/+8
| | | | | | | | | | | On arm CONFIG_CMDLINE_EXTEND does not append build-in cmdline in kernel to U-boot parameters. Fix it here. Theoretically this patch should repair kdump work where it adds elfcorehdr= and memmap additional parameters to second kernel. Signed-off-by: Max Uvarov <muvarov@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
* Merge tag 'arm64-upstream' of ↵Linus Torvalds2016-03-181-4/+15
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 updates from Catalin Marinas: "Here are the main arm64 updates for 4.6. There are some relatively intrusive changes to support KASLR, the reworking of the kernel virtual memory layout and initial page table creation. Summary: - Initial page table creation reworked to avoid breaking large block mappings (huge pages) into smaller ones. The ARM architecture requires break-before-make in such cases to avoid TLB conflicts but that's not always possible on live page tables - Kernel virtual memory layout: the kernel image is no longer linked to the bottom of the linear mapping (PAGE_OFFSET) but at the bottom of the vmalloc space, allowing the kernel to be loaded (nearly) anywhere in physical RAM - Kernel ASLR: position independent kernel Image and modules being randomly mapped in the vmalloc space with the randomness is provided by UEFI (efi_get_random_bytes() patches merged via the arm64 tree, acked by Matt Fleming) - Implement relative exception tables for arm64, required by KASLR (initial code for ARCH_HAS_RELATIVE_EXTABLE added to lib/extable.c but actual x86 conversion to deferred to 4.7 because of the merge dependencies) - Support for the User Access Override feature of ARMv8.2: this allows uaccess functions (get_user etc.) to be implemented using LDTR/STTR instructions. Such instructions, when run by the kernel, perform unprivileged accesses adding an extra level of protection. The set_fs() macro is used to "upgrade" such instruction to privileged accesses via the UAO bit - Half-precision floating point support (part of ARMv8.2) - Optimisations for CPUs with or without a hardware prefetcher (using run-time code patching) - copy_page performance improvement to deal with 128 bytes at a time - Sanity checks on the CPU capabilities (via CPUID) to prevent incompatible secondary CPUs from being brought up (e.g. weird big.LITTLE configurations) - valid_user_regs() reworked for better sanity check of the sigcontext information (restored pstate information) - ACPI parking protocol implementation - CONFIG_DEBUG_RODATA enabled by default - VDSO code marked as read-only - DEBUG_PAGEALLOC support - ARCH_HAS_UBSAN_SANITIZE_ALL enabled - Erratum workaround Cavium ThunderX SoC - set_pte_at() fix for PROT_NONE mappings - Code clean-ups" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (99 commits) arm64: kasan: Fix zero shadow mapping overriding kernel image shadow arm64: kasan: Use actual memory node when populating the kernel image shadow arm64: Update PTE_RDONLY in set_pte_at() for PROT_NONE permission arm64: Fix misspellings in comments. arm64: efi: add missing frame pointer assignment arm64: make mrs_s prefixing implicit in read_cpuid arm64: enable CONFIG_DEBUG_RODATA by default arm64: Rework valid_user_regs arm64: mm: check at build time that PAGE_OFFSET divides the VA space evenly arm64: KVM: Move kvm_call_hyp back to its original localtion arm64: mm: treat memstart_addr as a signed quantity arm64: mm: list kernel sections in order arm64: lse: deal with clobbered IP registers after branch via PLT arm64: mm: dump: Use VA_START directly instead of private LOWEST_ADDR arm64: kconfig: add submenu for 8.2 architectural features arm64: kernel: acpi: fix ioremap in ACPI parking protocol cpu_postboot arm64: Add support for Half precision floating point arm64: Remove fixmap include fragility arm64: Add workaround for Cavium erratum 27456 arm64: mm: Mark .rodata as RO ...
| * of/fdt: factor out assignment of initrd_start/initrd_endArd Biesheuvel2016-02-181-3/+11
| | | | | | | | | | | | | | | | | | | | | | Since architectures may not yet have their linear mapping up and running when the initrd address is discovered from the DT, factor out the assignment of initrd_start and initrd_end, so that an architecture can override it and use the translation it needs. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * of/fdt: make memblock minimum physical address arch configurableArd Biesheuvel2016-02-181-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | By default, early_init_dt_add_memory_arch() ignores memory below the base of the kernel image since it won't be addressable via the linear mapping. However, this is not appropriate anymore once we decouple the kernel text mapping from the linear mapping, so archs may want to drop the low limit entirely. So allow the minimum to be overridden by setting MIN_MEMBLOCK_ADDR. Acked-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* | of: earlycon: Log more helpful message if stdout-path node not foundPeter Hurley2016-02-071-3/+6
| | | | | | | | | | | | | | | | | | | | | | Earlycon may fail to initialize for a variety of reasons, most of which log the default early param message. If the stdout-path node is not found, log the path which was not found (and suppress the default early param message). Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | of: earlycon: Move address translation to of_setup_earlycon()Peter Hurley2016-02-071-7/+1
| | | | | | | | | | | | | | | | | | | | | | Cleanup the early DT/earlycon separation; remove the 'addr' parameter from of_setup_earlycon() and get the uart phys addr directly with a new wrapper function, of_flat_dt_translate_addr(). Limit fdt_translate_address() to file scope. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | of: earlycon: Initialize port fields from DT propertiesPeter Hurley2016-02-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Read the optional "reg-offset", "reg-shift", "reg-io-width" and endianness properties and initialize the respective struct uart_port field if found. NB: These bindings are common to several drivers and the values merely indicate the default value; the registering earlycon setup() method can simply override the values if required. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | of: earlycon: Add options string handlingPeter Hurley2016-02-071-5/+6
| | | | | | | | | | | | | | | | | | Pass-through any options string in the 'stdout-path' property to the earlycon "driver" setup. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | of: earlycon: Fixup earlycon console name and indexPeter Hurley2016-02-071-1/+1
| | | | | | | | | | | | | | | | | | | | Use the console name embedded in the OF earlycon table by the OF_EARLYCON_DECLARE() macro to initialize the struct console 'name' and 'index' fields. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | earlycon: Use common framework for earlycon declarationsPeter Hurley2016-02-071-7/+7
|/ | | | | | | | | | | | | | | | | | | | | | Use a single common table of struct earlycon_id for both command line and devicetree. Re-define OF_EARLYCON_DECLARE() macro to instance a unique earlycon declaration (the declaration is only guaranteed to be unique within a compilation unit; separate compilation units must still use unique earlycon names). The semantics of OF_EARLYCON_DECLARE() is different; it declares an earlycon which can matched either on the command line or by devicetree. EARLYCON_DECLARE() is semantically unchanged; it declares an earlycon which is matched by command line only. Remove redundant instances of EARLYCON_DECLARE(). This enables all earlycons to properly initialize struct console with the appropriate name and index, which improves diagnostics and enables direct earlycon-to-console handoff. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* of/fdt: Add mutex protection for calls to __unflatten_device_tree()Guenter Roeck2015-12-081-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | __unflatten_device_tree() calls unflatten_dt_node(), which declares a static variable. It is therefore not reentrant. One of the callers of __unflatten_device_tree(), unflatten_device_tree(), is only called once during early initialization and does not need to be protected. The other caller, of_fdt_unflatten_tree(), can be called at any time, possibly multiple times in parallel. This can happen, for example, if multiple devicetree overlays have to be loaded and installed. Without this protection, errors such as the following may be seen. kernel: End of tree marker overwritten: e6a3a458 kernel: find_target_node: Failed to find target-indirect node at /fragment@0 kernel: __of_overlay_create: of_build_overlay_info() failed for tree@/ Add a mutex to of_fdt_unflatten_tree() to make the call reentrant. Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Cc: stable@vger.kernel.org # v4.1+ Signed-off-by: Rob Herring <robh@kernel.org>
* of: do not use 0x in front of %paDmitry V. Krivenok2015-12-011-1/+1
| | | | | Signed-off-by: Dmitry V. Krivenok <krivenok.dmitry@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
* drivers: of: removing assignment of 0 to static variableSaurabh Sengar2015-10-301-1/+1
| | | | | | | no need to initialise static variable with 0, hence correcting it. Signed-off-by: Saurabh Sengar <saurabh.truth@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
* of/fdt: fix error checking for earlycon addressMasahiro Yamada2015-10-271-2/+3
| | | | | | | | | fdt_translate_address() returns OF_BAD_ADDR on error. It is defined as a u64 value, so the variable "addr" should be defined as u64 as well. Fixes: fb11ffe74c79 ("of/fdt: add FDT serial scanning for earlycon") Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Rob Herring <robh@kernel.org>
* of/fdt: fix aliases with baudrate in earlyconStefan Agner2015-10-131-1/+4
| | | | | | | | | | | | | Many boards use an alias in the stdout-path specification along with console options after a colon (e.g. serial0:115200n8). When using earlycon, this specification currently does not work. While fdt_path_offset supports alias resolution, it does not remove the console options by itself. Use the fdt_path_offset_namelen variant and provide the length of the alias to enable aliases with console options in the stdout-path. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Rob Herring <robh@kernel.org>
* of/fdt: make memblock maximum physical address arch configurableArd Biesheuvel2015-08-241-5/+7
| | | | | | | | | | | | | | | | | | | | When parsing the memory nodes to populate the memblock memory table, we check against high and low limits and clip any memory that exceeds either one of them. However, for arm64, the high limit of (phys_addr_t)~0 is not very meaningful, since phys_addr_t is 64 bits (i.e., no limit) but there may be other constraints that limit the memory ranges that we can support. So rename MAX_PHYS_ADDR to MAX_MEMBLOCK_ADDR (for clarity) and only define it if the arch does not supply a definition of its own. Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Stuart Yoder <stuart.yoder@freescale.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
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