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2017-08-21arm/efi: Replace open coded constants with symbolic onesArd Biesheuvel1-61/+67
Replace the various open coded constants in the EFI PE/COFF header with definitions from pe.h, or expressions based on local symbols. Signed-off-by: Ard Biesheuvel <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Matt Fleming <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
2017-08-21arm/efi: Remove pointless dummy .reloc sectionArd Biesheuvel1-17/+1
The kernel's EFI PE/COFF header contains a dummy .reloc section, and an explanatory comment that claims that this is required for the EFI application loader to accept the Image as a relocatable image (i.e., one that can be loaded at any offset and fixed up in place) This was inherited from the x86 implementation, which has elaborate host tooling to mangle the PE/COFF header post-link time, and which populates the .reloc section with a single dummy base relocation. On ARM, no such tooling exists, and the .reloc section remains empty, and is never even exposed via the BaseRelocationTable directory entry, which is where the PE/COFF loader looks for it. The PE/COFF spec is unclear about relocatable images that do not require any fixups, but the EDK2 implementation, which is the de facto reference for PE/COFF in the UEFI space, clearly does not care, and explicitly mentions (in a comment) that relocatable images with no base relocations are perfectly fine, as long as they don't have the RELOCS_STRIPPED attribute set (which is not the case for our PE/COFF image) So simply remove the .reloc section altogether. Signed-off-by: Ard Biesheuvel <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Matt Fleming <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
2017-08-21arm/efi: Remove forbidden values from the PE/COFF headerArd Biesheuvel1-3/+3
Bring the PE/COFF header in line with the PE/COFF spec, by setting NumberOfSymbols to 0, and removing the section alignment flags. Signed-off-by: Ard Biesheuvel <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Matt Fleming <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
2017-07-10bitmap: use memcmp optimisation in more situationsMatthew Wilcox1-0/+1
Commit 7dd968163f7c ("bitmap: bitmap_equal memcmp optimization") was rather more restrictive than necessary; we can use memcmp() to implement bitmap_equal() as long as the number of bits can be proved to be a multiple of 8. And architectures other than s390 may be able to make good use of this optimisation. [[email protected]: fix build: add a memcmp() declaration] Link: http://lkml.kernel.org/r/[email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Matthew Wilcox <[email protected]> Signed-off-by: Arnd Bergmann <[email protected]> Acked-by: Rasmus Villemoes <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2017-06-12ARM: 8680/1: boot/compressed: fix inappropriate Thumb2 mnemonic for __nopArd Biesheuvel1-1/+2
Commit 06a4b6d009a1 ("ARM: 8677/1: boot/compressed: fix decompressor header layout for v7-M") fixed an issue in the layout of the header of the compressed kernel image that was caused by the assembler emitting narrow opcodes for 'mov r0, r0', and for this reason, the mnemonic was updated to use the W() macro, which will append the .w suffix (which forces a wide encoding) if required, i.e., when building the kernel in Thumb2 mode. However, this failed to take into account that on Thumb2 kernels built for CPUs that are also ARM capable, the entry point is entered in ARM mode, and so the instructions emitted here will be ARM instructions that only exist in a wide encoding to begin with, which is why the assembler rejects the .w suffix here and aborts the build with the following message: head.S: Assembler messages: head.S:132: Error: width suffixes are invalid in ARM mode -- `mov.w r0,r0' So replace the W(mov) with separate ARM and Thumb2 instructions, where the latter will only be used for THUMB2_ONLY builds. Fixes: 06a4b6d009a1 ("ARM: 8677/1: boot/compressed: fix decompressor ...") Reported-by: Arnd Bergmann <[email protected]> Acked-by: Arnd Bergmann <[email protected]> Signed-off-by: Ard Biesheuvel <[email protected]> Signed-off-by: Russell King <[email protected]>
2017-06-05ARM: 8677/1: boot/compressed: fix decompressor header layout for v7-MArd Biesheuvel2-10/+11
As reported by Patrice, the header layout of the decompressor is incorrect when building for v7-M. In this case, the __nop macro resolves to 'mov r0, r0', which is emitted as a narrow encoding, resulting in the header data fields to end up at lower offsets than required. Given the variety of targets we need to support with the same code, the startup sequence is a bit of a jumble, and uses instructions and macros whose encoding widths cannot be specified (badr), or only exist in a narrow encoding (bx) So force the use of a wide encoding in __nop, and replace the start sequence with a simple jump to the label marking the start of code, preceded by a Thumb2 mode switch if required (using explicit wide encodings where appropriate). The label itself can be moved to the start of code [where it belongs] due to the larger range of branch instructions as compared to adr instructions. Reported-by: Patrice CHOTARD <[email protected]> Acked-by: Nicolas Pitre <[email protected]> Signed-off-by: Ard Biesheuvel <[email protected]> Signed-off-by: Russell King <[email protected]>
2017-04-09ARM: decompressor: Remove __hyp_get_vectors usageMarc Zyngier1-1/+11
When the compressed image needs to be relocated to avoid being overwritten by the decompression process, we need to relocate the hyp vectors as well so that we can find them once the decompression has taken effect. For that, we perform the following calculation: u32 v = __hyp_get_vectors(); v += offset; __hyp_set_vectors(v); But we're guaranteed that the initial value of v as returned by __hyp_get_vectors is always __hyp_stub_vectors, because we have just set it by calling __hyp_stub_install. So let's remove the use of __hyp_get_vectors, and directly use __hyp_stub_vectors instead. Acked-by: Russell King <[email protected]> Acked-by: Catalin Marinas <[email protected]> Signed-off-by: Marc Zyngier <[email protected]> Signed-off-by: Christoffer Dall <[email protected]>
2017-02-28Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-armLinus Torvalds1-0/+1
Pull ARM updates from Russell King: - nommu updates from Afzal Mohammed cleaning up the vectors support - allow DMA memory "mapping" for nommu Benjamin Gaignard - fixing a correctness issue with R_ARM_PREL31 relocations in the module linker - add strlen() prototype for the decompressor - support for DEBUG_VIRTUAL from Florian Fainelli - adjusting memory bounds after memory reservations have been registered - unipher cache handling updates from Masahiro Yamada - initrd and Thumb Kconfig cleanups * 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (23 commits) ARM: mm: round the initrd reservation to page boundaries ARM: mm: clean up initrd initialisation ARM: mm: move initrd init code out of arm_memblock_init() ARM: 8655/1: improve NOMMU definition of pgprot_*() ARM: 8654/1: decompressor: add strlen prototype ARM: 8652/1: cache-uniphier: clean up active way setup code ARM: 8651/1: cache-uniphier: include <linux/errno.h> instead of <linux/types.h> ARM: 8650/1: module: handle negative R_ARM_PREL31 addends correctly ARM: 8649/2: nommu: remove Hivecs configuration is asm ARM: 8648/2: nommu: display vectors base ARM: 8647/2: nommu: dynamic exception base address setting ARM: 8646/1: mmu: decouple VECTORS_BASE from Kconfig ARM: 8644/1: Reduce "CPU: shutdown" message to debug level ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol ARM: 8640/1: Add support for CONFIG_DEBUG_VIRTUAL ARM: 8639/1: Define KERNEL_START and KERNEL_END ARM: 8638/1: mtd: lart: Rename partition defines to be prefixed with PART_ ARM: 8637/1: Adjust memory boundaries after reservations ARM: 8636/1: Cleanup sanity_check_meminfo ARM: add CPU_THUMB_CAPABLE to indicate possible Thumb support ...
2017-02-28ARM: 8654/1: decompressor: add strlen prototypeArnd Bergmann1-0/+1
The decompress.c file contains a declaration for strstr() so we can include some compression library code. With the updated LZ4 implementation, we run into the same problem again for strlen(): In file included from ../include/linux/rcupdate.h:40:0, from ../include/linux/srcu.h:33, from ../include/linux/notifier.h:15, from ../include/linux/memory_hotplug.h:6, from ../include/linux/mmzone.h:749, from ../include/linux/gfp.h:5, from ../include/linux/kmod.h:22, from ../include/linux/module.h:13, from ../arch/arm/boot/compressed/../../../../lib/lz4/lz4_decompress.c:39, from ../arch/arm/boot/compressed/../../../../lib/decompress_unlz4.c:13, from ../arch/arm/boot/compressed/decompress.c:55: include/linux/cpumask.h: In function 'cpumask_parse': include/linux/cpumask.h:592:53: error: implicit declaration of function 'strlen';did you mean 'strstr'? [-Werror=implicit-function-declaration] This adds another declaration to work around the new problem. Fixes: ce83d9ab80d6 ("lib: update LZ4 compressor module") Signed-off-by: Arnd Bergmann <[email protected]> Signed-off-by: Russell King <[email protected]>
2017-02-27scripts/spelling.txt: add "swith" pattern and fix typo instancesMasahiro Yamada1-1/+1
Fix typos and add the following to the scripts/spelling.txt: swith||switch swithable||switchable swithed||switched swithing||switching While we are here, fix the "update" to "updates" in the touched hunk in drivers/net/wireless/marvell/mwifiex/wmm.c. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Masahiro Yamada <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-10-02ARM: 8618/1: decompressor: reset ttbcr fields to use TTBR0 on ARMv7Srinivas Ramana1-1/+1
If the bootloader uses the long descriptor format and jumps to kernel decompressor code, TTBCR may not be in a right state. Before enabling the MMU, it is required to clear the TTBCR.PD0 field to use TTBR0 for translation table walks. The commit dbece45894d3a ("ARM: 7501/1: decompressor: reset ttbcr for VMSA ARMv7 cores") does the reset of TTBCR.N, but doesn't consider all the bits for the size of TTBCR.N. Clear TTBCR.PD0 field and reset all the three bits of TTBCR.N to indicate the use of TTBR0 and the correct base address width. Fixes: dbece45894d3 ("ARM: 7501/1: decompressor: reset ttbcr for VMSA ARMv7 cores") Acked-by: Robin Murphy <[email protected]> Signed-off-by: Srinivas Ramana <[email protected]> Signed-off-by: Russell King <[email protected]>
2016-03-19Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-armLinus Torvalds7-47/+16
Pull ARM updates from Russell King: "Another mixture of changes this time around: - Split XIP linker file from main linker file to make it more maintainable, and various XIP fixes, and clean up a resulting macro. - Decompressor cleanups from Masahiro Yamada - Avoid printing an error for a missing L2 cache - Remove some duplicated symbols in System.map, and move vectors/stubs back into kernel VMA - Various low priority fixes from Arnd - Updates to allow bus match functions to return negative errno values, touching some drivers and the driver core. Greg has acked these changes. - Virtualisation platform udpates form Jean-Philippe Brucker. - Security enhancements from Kees Cook - Rework some Kconfig dependencies and move PSCI idle management code out of arch/arm into drivers/firmware/psci.c - ARM DMA mapping updates, touching media, acked by Mauro. - Fix places in ARM code which should be using virt_to_idmap() so that Keystone2 can work. - Fix Marvell Tauros2 to work again with non-DT boots. - Provide a delay timer for ARM Orion platforms" * 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (45 commits) ARM: 8546/1: dma-mapping: refactor to fix coherent+cma+gfp=0 ARM: 8547/1: dma-mapping: store buffer information ARM: 8543/1: decompressor: rename suffix_y to compress-y ARM: 8542/1: decompressor: merge piggy.*.S and simplify Makefile ARM: 8541/1: decompressor: drop redundant FORCE in Makefile ARM: 8540/1: decompressor: use clean-files instead of extra-y to clean files ARM: 8539/1: decompressor: drop more unneeded assignments to "targets" ARM: 8538/1: decompressor: drop unneeded assignments to "targets" ARM: 8532/1: uncompress: mark putc as inline ARM: 8531/1: turn init_new_context into an inline function ARM: 8530/1: remove VIRT_TO_BUS ARM: 8537/1: drop unused DEBUG_RODATA from XIP_KERNEL ARM: 8536/1: mm: hide __start_rodata_section_aligned for non-debug builds ARM: 8535/1: mm: DEBUG_RODATA makes no sense with XIP_KERNEL ARM: 8534/1: virt: fix hyp-stub build for pre-ARMv7 CPUs ARM: make the physical-relative calculation more obvious ARM: 8512/1: proc-v7.S: Adjust stack address when XIP_KERNEL ARM: 8411/1: Add default SPARSEMEM settings ARM: 8503/1: clk_register_clkdev: remove format string interface ARM: 8529/1: remove 'i' and 'zi' targets ...
2016-03-19Merge tag 'devicetree-for-4.6' of ↵Linus Torvalds1-0/+9
git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull DeviceTree updates from Rob Herring: - new tool 'dtx_diff' to diff DT files - sync kernel's dtc/libfdt to current dtc repo master - fix for reserved memory regions located in highmem - document standard unit suffixes for DT properties - various DT binding doc updates * tag 'devicetree-for-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: of: Add vendor prefix for eGalax_eMPIA Technology Inc Input: ads7846: Add description how to use internal reference (ADS7846) ARM: realview: add EB syscon variants to bindings devicetree: bindings: ARM: Use "uV" for micro-volt serial: fsl-imx-uart: Fix typo in fsl,dte-mode description of: add 'const' for of_property_*_string*() parameter '*np' of/unittest: fix infinite loop in of_unittest_destroy_tracked_overlays() of: alloc anywhere from memblock if range not specified kbuild: Allow using host dtc instead of kernel's copy of: resolver: Add missing of_node_get and of_node_put of: Add United Radiant Technology Corporation vendor prefix dt/bindings: add documentation on standard property unit suffixes scripts/dtc: Update to upstream commit b06e55c88b9b ARM: boot: Add an implementation of strnlen for libfdt scripts/dtc: dtx_diff - add info to error message dtc: create tool to diff device trees
2016-03-04Merge branches 'amba', 'fixes', 'misc' and 'tauros2' into for-nextRussell King7-47/+18
2016-02-22ARM: 8543/1: decompressor: rename suffix_y to compress-yMasahiro Yamada1-6/+6
The "$(suffix_y)" no longer appears in the file names, but it just specifies the method of the file compression. The "compress-y" sounds more suitable. Signed-off-by: Masahiro Yamada <[email protected]> Signed-off-by: Russell King <[email protected]>
2016-02-22ARM: 8542/1: decompressor: merge piggy.*.S and simplify MakefileMasahiro Yamada7-38/+8
The files piggy.$(suffix).S are similar enough to be merged into a single file. This also allows clean up of the Makefile. Signed-off-by: Masahiro Yamada <[email protected]> Signed-off-by: Russell King <[email protected]>
2016-02-22ARM: 8541/1: decompressor: drop redundant FORCE in MakefileMasahiro Yamada1-1/+1
The object "piggy.$(suffix_y).o" is created from "piggy.$(suffix).S" by the following pattern rule defined in scripts/Makefile.build: $(obj)/%.o: $(src)/%.S FORCE $(call if_changed_dep,as_o_S) FORCE is already added to the prerequisite of the object there. Signed-off-by: Masahiro Yamada <[email protected]> Signed-off-by: Russell King <[email protected]>
2016-02-22ARM: 8540/1: decompressor: use clean-files instead of extra-y to clean filesMasahiro Yamada1-2/+1
This code works fine here, but it is tricky to use "extra-y" for specifying files to be removed during "make clean". Kbuild provides "clean-files" for this purpose. Signed-off-by: Masahiro Yamada <[email protected]> Signed-off-by: Russell King <[email protected]>
2016-02-22ARM: 8539/1: decompressor: drop more unneeded assignments to "targets"Masahiro Yamada1-1/+1
The objects "font.o" and "misc.o" are contained in $(OBJS), and it is already added to the "targets". Signed-off-by: Masahiro Yamada <[email protected]> Signed-off-by: Russell King <[email protected]>
2016-02-22ARM: 8538/1: decompressor: drop unneeded assignments to "targets"Masahiro Yamada1-2/+2
The "targets" exists to specify which files need the corresponding ".*_cmd" files to be included during the build. In other words, it is used for files that need to detect the change of the command line by if_changed, if_changed_dep, and if_changed_rule. While, these files are just copied by "$(call cmd,shipped)". Adding them to the "targets" is meaningless because $(call cmd,...) never creates ".*_cmd" files. Such files as ".lib1funcs.S.cmd", ".ashldi3.S.cmd" do not exist in the first place. Signed-off-by: Masahiro Yamada <[email protected]> Signed-off-by: Russell King <[email protected]>
2016-02-22ARM: 8534/1: virt: fix hyp-stub build for pre-ARMv7 CPUsJean-Philippe Brucker1-0/+2
ARMv6 CPUs do not have virtualisation extensions, but hyp-stub.S is still included into the image to keep it generic. In order to use ARMv7 instructions during HYP initialisation, add -march=armv7-a flag to hyp-stub's build. On an ARMv6 CPU, __hyp_stub_install returns as soon as it detects that the mode isn't HYP, so we will never reach those instructions. Signed-off-by: Jean-Philippe Brucker <[email protected]> Signed-off-by: Russell King <[email protected]>
2016-02-22ARM: 8534/1: virt: fix hyp-stub build for pre-ARMv7 CPUsJean-Philippe Brucker1-0/+2
ARMv6 CPUs do not have virtualisation extensions, but hyp-stub.S is still included into the image to keep it generic. In order to use ARMv7 instructions during HYP initialisation, add -march=armv7-a flag to hyp-stub's build. On an ARMv6 CPU, __hyp_stub_install returns as soon as it detects that the mode isn't HYP, so we will never reach those instructions. Signed-off-by: Jean-Philippe Brucker <[email protected]> Signed-off-by: Russell King <[email protected]>
2016-02-11ARM: boot: Add an implementation of strnlen for libfdtRob Herring1-0/+9
Recent versions of libfdt add a dependency on strnlen. Copy the implementation in lib/string.c here, so we can update libfdt. Acked-by: Russell King <[email protected]> Signed-off-by: Rob Herring <[email protected]>
2016-01-26ARM: 8500/1: fix atags_to_fdt with stack-protector-strongKees Cook1-0/+9
Building with CONFIG_CC_STACKPROTECTOR_STRONG triggers protection code generation under CONFIG_ARM_ATAG_DTB_COMPAT but this is too early for being able to use any of the stack_chk code. Explicitly disable it for only the atags_to_fdt bits. Suggested-by: zhxihu <[email protected]> Signed-off-by: Kees Cook <[email protected]> Acked-by: Arnd Bergmann <[email protected]> Signed-off-by: Russell King <[email protected]>
2015-12-14ARM: add UEFI stub supportRoy Franz4-3/+192
This patch adds EFI stub support for the ARM Linux kernel. The EFI stub operates similarly to the x86 and arm64 stubs: it is a shim between the EFI firmware and the normal zImage entry point, and sets up the environment that the zImage is expecting. This includes optionally loading the initrd and device tree from the system partition based on the kernel command line. Signed-off-by: Roy Franz <[email protected]> Tested-by: Ryan Harkin <[email protected]> Reviewed-by: Matt Fleming <[email protected]> Signed-off-by: Ard Biesheuvel <[email protected]>
2015-09-10lib/decompressors: use real out buf size for gunzip with kernelYinghai Lu1-1/+1
When loading x86 64bit kernel above 4GiB with patched grub2, got kernel gunzip error. | early console in decompress_kernel | decompress_kernel: | input: [0x807f2143b4-0x807ff61aee] | output: [0x807cc00000-0x807f3ea29b] 0x027ea29c: output_len | boot via startup_64 | KASLR using RDTSC... | new output: [0x46fe000000-0x470138cfff] 0x0338d000: output_run_size | decompress: [0x46fe000000-0x47007ea29b] <=== [0x807f2143b4-0x807ff61aee] | | Decompressing Linux... gz... | | uncompression error | | -- System halted the new buffer is at 0x46fe000000ULL, decompressor_gzip is using 0xffffffb901ffffff as out_len. gunzip in lib/zlib_inflate/inflate.c cap that len to 0x01ffffff and decompress fails later. We could hit this problem with crashkernel booting that uses kexec loading kernel above 4GiB. We have decompress_* support: 1. inbuf[]/outbuf[] for kernel preboot. 2. inbuf[]/flush() for initramfs 3. fill()/flush() for initrd. This bug only affect kernel preboot path that use outbuf[]. Add __decompress and take real out_buf_len for gunzip instead of guessing wrong buf size. Fixes: 1431574a1c4 (lib/decompressors: fix "no limit" output buffer length) Signed-off-by: Yinghai Lu <[email protected]> Cc: Alexandre Courbot <[email protected]> Cc: Jon Medhurst <[email protected]> Cc: Stephen Warren <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2015-07-06ARM: shmobile: Remove obsolete zboot supportGeert Uytterhoeven2-75/+0
The last user of the zboot code was the KZM-A9-GT legacy board code, which has been removed. Signed-off-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Simon Horman <[email protected]>
2015-07-01Merge tag 'devicetree-for-linus' of ↵Linus Torvalds1-0/+4
git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux Pull devicetree updates from Grant Likely: "A whole lot of bug fixes. Nothing stands out here except the ability to enable CONFIG_OF on every architecture, and an import of a newer version of dtc" * tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux: (22 commits) of/irq: Rename "intc_desc" to "of_intc_desc" to fix OF on sh of/irq: Fix pSeries boot failure Documentation: DT: Fix a typo in the filename "lantiq,<chip>-pinumx.txt" of: define of_find_node_by_phandle for !CONFIG_OF of/address: use atomic allocation in pci_register_io_range() of: Add vendor prefix for Zodiac Inflight Innovations dt/fdt: add empty versions of early_init_dt_*_memory_arch of: clean-up unnecessary libfdt include paths of: make unittest select OF_EARLY_FLATTREE instead of depend on it of: make CONFIG_OF user selectable MIPS: prepare for user enabling of CONFIG_OF of/fdt: fix argument name and add comments of unflatten_dt_node() of: return NUMA_NO_NODE from fallback of_node_to_nid() tps6507x.txt: Remove executable permission of/overlay: Grammar s/an negative/a negative/ of/fdt: Make fdt blob input parameters of unflatten functions const of: add helper function to retrive match data of: Grammar s/property exist/property exists/ of: Move OF flags to be visible even when !CONFIG_OF scripts/dtc: Update to upstream version 9d3649bd3be245c9 ...
2015-06-12Merge branch 'bsym' into for-nextRussell King1-2/+2
Conflicts: arch/arm/kernel/head.S
2015-05-28ARM: 8373/1: disable branch profiling in uncompressorArnd Bergmann1-0/+2
The branch profiling code cannot work outside of the main kernel and just causes link errors if we try to use it in the decompressor. Disabling it here matches what we do for other architectures. Signed-off-by: Arnd Bergmann <[email protected]> Signed-off-by: Russell King <[email protected]>
2015-05-08ARM: replace BSYM() with badr assembly macroRussell King1-2/+2
BSYM() was invented to allow us to work around a problem with the assembler, where local symbols resolved by the assembler for the 'adr' instruction did not take account of their ISA. Since we don't want BSYM() used elsewhere, replace BSYM() with a new macro 'badr', which is like the 'adr' pseudo-op, but with the BSYM() mechanics integrated into it. This ensures that the BSYM()-ification is only used in conjunction with 'adr'. Acked-by: Dave Martin <[email protected]> Acked-by: Nicolas Pitre <[email protected]> Signed-off-by: Russell King <[email protected]>
2015-04-29libfdt: add fdt type definitionsRob Herring1-0/+4
In preparation for libfdt/dtc update, add the new fdt specific types. Signed-off-by: Rob Herring <[email protected]> Cc: Russell King <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: [email protected] Cc: [email protected]
2015-04-22Merge tag 'armsoc-multiplatform' of ↵Linus Torvalds6-688/+0
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC multiplatform code changes from Olof Johansson: "The changes here belong to two main platforms: - Atmel At91 is flipping the bit and going multiplatform. This includes some cleanups and removal of code, and the final flip of config dependencies - Shmobile has several platforms that are going multiplatform, but this branch also contains a bunch of cleanups that they weren't able to keep separate in a good way. THere's also a removal of one of their SoCs and the corresponding boards (sh7372 and mackerel)" * tag 'armsoc-multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (67 commits) ARM: at91/pm: move AT91_MEMCTRL_* to pm.h ARM: at91/pm: move the standby functions to pm.c ARM: at91: fix pm_suspend.S compilation when ARMv6 is selected ARM: at91: add a Kconfig dependency on multi-platform ARM: at91: drop AT91_TIMER_HZ ARM: at91: remove hardware.h ARM: at91: remove SoC headers ARM: at91: remove useless mach/cpu.h ARM: at91: remove unused headers ARM: at91: switch at91_dt_defconfig to multiplatform ARM: at91: switch to multiplatform ARM: shmobile: r8a7778: enable multiplatform target ARM: shmobile: bockw: add sound to DT ARM: shmobile: r8a7778: add sound to DT ARM: shmobile: bockw: add devices hooked up to i2c0 to DT DT: i2c: add trivial binding for OKI ML86V7667 video decoder ARM: shmobile: r8a7778: common clock framework CPG driver ARM: shmobile: bockw dts: set extal clock frequency ARM: shmobile: bockw dts: Move Ethernet node to BSC ARM: shmobile: r8a73a4: Remove legacy code ...
2015-03-28ARM: 8327/1: zImage: add support for ARMv7-MJoachim Eastwood1-6/+27
This patch makes it possible to enter zImage in Thumb mode for ARMv7-M (Cortex-M) CPUs that do not support ARM mode. The kernel entry is also made in Thumb mode. [ukl: fix spelling in commit log, return early in call_cache_fn] Signed-off-by: Joachim Eastwood <[email protected]> Tested-by: Stefan Agner <[email protected]> Tested-by: Ezequiel Garcia <[email protected]> Tested-by: Chanwoo Choi <[email protected]> Signed-off-by: Uwe Kleine-König <[email protected]> Signed-off-by: Russell King <[email protected]>
2015-03-27ARM: add documentation for finding start of physical memoryRussell King1-1/+18
Occasionally, there's a question about the method we use to find the start of physical memory. Add some documentation so we don't have to keep repeating outselves on the mailing list. Signed-off-by: Russell King <[email protected]>
2015-02-24ARM: shmobile: sh7372: Remove ZBOOT MMC/SDHI supportMagnus Damm6-688/+0
Remove the sh7372 implementation and the shared ZBOOT MMC and SDHI support code from the compressed ARM boot loader. With this in place it is no longer possible to boot any self-contained kernel for sh7372 directly from Mask ROM via SDHI and MMCIF hardware. Signed-off-by: Magnus Damm <[email protected]> Acked-by: Laurent Pinchart <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Simon Horman <[email protected]>
2015-02-10Merge branches 'debug', 'fixes', 'l2c' (early part), 'misc' and 'sa1100' ↵Russell King1-10/+31
into for-next
2015-01-29ARM: 8294/1: ATAG_DTB_COMPAT: remove the DT workspace's hardcoded 64KB sizeNicolas Pitre1-9/+30
There is currently a hardcoded limit of 64KB for the DTB to live in and be extended with ATAG info. Some DTBs have outgrown that limit: $ du -b arch/arm/boot/dts/omap3-n900.dtb 70212 arch/arm/boot/dts/omap3-n900.dtb Furthermore, the actual size passed to atags_to_fdt() included the stack size which is obviously wrong. The initial DTB size is known, so use it to size the allocated workspace with a 50% growth assumption and relocate the temporary stack above that. This is also clamped to 32KB min / 1MB max for robustness against bad DTB data. Reported-by: Pali Rohár <[email protected]> Tested-by: Pavel Machek <[email protected]> Signed-off-by: Nicolas Pitre <[email protected]> Signed-off-by: Russell King <[email protected]>
2015-01-21ARM: 8290/1: decompressor: fix a wrong commentMasahiro Yamada1-1/+1
This comment does not correspond to the actual code. When zImage is loaded at a lower *OR* higher address of the destination of Image, it won't overwrite itself. Signed-off-by: Masahiro Yamada <[email protected]> Acked-by: Nicolas Pitre <[email protected]> Signed-off-by: Russell King <[email protected]>
2014-11-13ARM: 8191/1: decompressor: ensure I-side picks up relocated codeWill Deacon1-4/+16
To speed up decompression, the decompressor sets up a flat, cacheable mapping of memory. However, when there is insufficient space to hold the page tables for this mapping, we don't bother to enable the caches and subsequently skip all the cache maintenance hooks. Skipping the cache maintenance before jumping to the relocated code allows the processor to predict the branch and populate the I-cache with stale data before the relocation loop has completed (since a bootloader may have SCTLR.I set, which permits normal, cacheable instruction fetches regardless of SCTLR.M). This patch moves the cache maintenance check into the maintenance routines themselves, allowing the v6/v7 versions to invalidate the I-cache regardless of the MMU state. Cc: <[email protected]> Reported-by: Marc Carino <[email protected]> Tested-by: Julien Grall <[email protected]> Signed-off-by: Will Deacon <[email protected]> Signed-off-by: Russell King <[email protected]>
2014-09-26ARM: 8153/1: Enable gcov support on the ARM architectureVincent Sanders1-0/+2
Enable gcov support for ARM based on original patches by David Singleton and George G. Davis Riku - updated to patch to current mainline kernel. The patch has been submitted in 2010, 2012 - for symmetry, now in 2014 too. https://lwn.net/Articles/390419/ http://marc.info/?l=linux-arm-kernel&m=133823081813044 v2: remove arch/arm/kernel from gcov disabled files Cc: Andrey Ryabinin <[email protected]> Cc: Naresh Kamboju <[email protected]> Acked-by: Arnd Bergmann <[email protected]> Signed-off-by: Riku Voipio <[email protected]> Signed-off-by: Vincent Sanders <[email protected]> Signed-off-by: Russell King <[email protected]>
2014-07-18ARM: 8079/1: zImage: identify kernel endiannessNicolas Pitre1-0/+1
With patch #8067/1 ("zImage: ensure header in LE format for BE8 kernels") applied, it is no longer possible to determine the endianness of a compiled kernel image. This normally shouldn't matter to the boot environment, except for those cases where the selection of a ramdisk or root filesystem with a matching endianness has to be automated. Let's add a flag to the zImage header indicating the actual endianness. Four bytes from offset 0x30 can be interpreted as follows: 04 03 02 01 big endian kernel 01 02 03 04 little endian kernel Anything else should be interpreted as "unknown", in which case it is most likely that patch #8067/1 was not applied either and the zImage magic number at offset 0x24 could be used instead to determine endianness. No zImage before this patch ever produced 0x01020304 nor 0x04030201 at offset 0x30 so there is no confusion possible. Signed-off-by: Nicolas Pitre <[email protected]> Acked-by: Kevin Hilman <[email protected]> Signed-off-by: Russell King <[email protected]>
2014-07-01ARM: simplify generation of compressed vmlinux.lds fileRussell King3-9/+2
As we are now using the C preprocessor, we do not need to use sed to edit constants in this file, and then pass the resulting file through the C preprocessor. Instead, rely solely on the C preprocessor to rewrite TEXT_START and BSS_ADDR. Acked-by: Nicolas Pitre <[email protected]> Signed-off-by: Russell King <[email protected]>
2014-07-01ARM: 8067/1: zImage: ensure header in LE format for BE8 kernelsNicolas Pitre4-5/+21
All known BE8-capable systems have LE bootloaders, so we need to ensure that the magic number and image start/end values are in little endian format. [[email protected]: from nico's original email on this subject] [[email protected]: removed lds.S->lds rule, added target to extra-y] Signed-off-by: Nicolas Pitre <[email protected]> Signed-off-by: Ben Dooks <[email protected]> Signed-off-by: Taras Kondratiuk <[email protected]> Signed-off-by: Russell King <[email protected]>
2014-06-05Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm into nextLinus Torvalds1-0/+2
Pull ARM updates from Russell King: - Major clean-up of the L2 cache support code. The existing mess was becoming rather unmaintainable through all the additions that others have done over time. This turns it into a much nicer structure, and implements a few performance improvements as well. - Clean up some of the CP15 control register tweaks for alignment support, moving some code and data into alignment.c - DMA properties for ARM, from Santosh and reviewed by DT people. This adds DT properties to specify bus translations we can't discover automatically, and to indicate whether devices are coherent. - Hibernation support for ARM - Make ftrace work with read-only text in modules - add suspend support for PJ4B CPUs - rework interrupt masking for undefined instruction handling, which allows us to enable interrupts earlier in the handling of these exceptions. - support for big endian page tables - fix stacktrace support to exclude stacktrace functions from the trace, and add save_stack_trace_regs() implementation so that kprobes can record stack traces. - Add support for the Cortex-A17 CPU. - Remove last vestiges of ARM710 support. - Removal of ARM "meminfo" structure, finally converting us solely to memblock to handle the early memory initialisation. * 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (142 commits) ARM: ensure C page table setup code follows assembly code (part II) ARM: ensure C page table setup code follows assembly code ARM: consolidate last remaining open-coded alignment trap enable ARM: remove global cr_no_alignment ARM: remove CPU_CP15 conditional from alignment.c ARM: remove unused adjust_cr() function ARM: move "noalign" command line option to alignment.c ARM: provide common method to clear bits in CPU control register ARM: 8025/1: Get rid of meminfo ARM: 8060/1: mm: allow sub-architectures to override PCI I/O memory type ARM: 8066/1: correction for ARM patch 8031/2 ARM: 8049/1: ftrace/add save_stack_trace_regs() implementation ARM: 8065/1: remove last use of CONFIG_CPU_ARM710 ARM: 8062/1: Modify ldrt fixup handler to re-execute the userspace instruction ARM: 8047/1: rwsem: use asm-generic rwsem implementation ARM: l2c: trial at enabling some Cortex-A9 optimisations ARM: l2c: add warnings for stuff modifying aux_ctrl register values ARM: l2c: print a warning with L2C-310 caches if the cache size is modified ARM: l2c: remove old .set_debug method ARM: l2c: kill L2X0_AUX_CTRL_MASK before anyone else makes use of this ...
2014-06-01ARM: 8025/1: Get rid of meminfoLaura Abbott1-0/+2
memblock is now fully integrated into the kernel and is the prefered method for tracking memory. Rather than reinvent the wheel with meminfo, migrate to using memblock directly instead of meminfo as an intermediate. Acked-by: Jason Cooper <[email protected]> Acked-by: Catalin Marinas <[email protected]> Acked-by: Santosh Shilimkar <[email protected]> Acked-by: Kukjin Kim <[email protected]> Tested-by: Marek Szyprowski <[email protected]> Tested-by: Leif Lindholm <[email protected]> Signed-off-by: Laura Abbott <[email protected]> Signed-off-by: Russell King <[email protected]>
2014-05-26ARM: compressed/head.S: remove s3c24xx special caseHeiko Stuebner1-5/+0
addruart from the generic debug macro is doing exactly the same using the common lowlevel uart definition, so there is no cause for this special casing for s3c24xx. Signed-off-by: Heiko Stuebner <[email protected]> Signed-off-by: Kukjin Kim <[email protected]>
2014-03-07ARM: 7992/1: boot: compressed: ignore bswapsdi2.SMark Rutland1-0/+1
Commit 017f161a55b4 (ARM: 7877/1: use built-in byte swap function) added bswapsdi2.{o,S} to arch/arm/boot/compressed/Makefile, but didn't update the .gitignore. Thus after a a build git status shows bswapsdi2.S as a new file, which is a little annoying. This patch updates arch/arm/boot/compressed/.gitignore to ignore bswapsdi2.S, as we already do for ashldi3.S and others. Signed-off-by: Mark Rutland <[email protected]> Acked-by: Nicolas Pitre <[email protected]> Acked-by: Kim Phillips <[email protected]> Cc: David Woodhouse <[email protected]> Signed-off-by: Russell King <[email protected]>
2014-01-23Merge tag 'soc-for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC platform changes from Olof Johansson: "New core SoC-specific changes. New platforms: * Introduction of a vendor, Hisilicon, and one of their SoCs with some random numerical product name. * Introduction of EFM32, embedded platform from Silicon Labs (ARMv7m, i.e. !MMU). * Marvell Berlin series of SoCs, which include the one in Chromecast. * MOXA platform support, ARM9-based platform used mostly in industrial products * Support for Freescale's i.MX50 SoC. Other work: * Renesas work for new platforms and drivers, and conversion over to more multiplatform-friendly device registration schemes. * SMP support for Allwinner sunxi platforms. * ... plus a bunch of other stuff across various platforms" * tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (201 commits) ARM: tegra: fix tegra_powergate_sequence_power_up() inline ARM: msm_defconfig: Update for multi-platform ARM: msm: Move MSM's DT based hardware to multi-platform support ARM: msm: Only build timer.c if required ARM: msm: Only build clock.c on proc_comm based platforms ARM: ux500: Enable system suspend with WFI support ARM: ux500: turn on PRINTK_TIME in u8500_defconfig ARM: shmobile: r8a7790: Fix I2C controller names ARM: msm: Simplify ARCH_MSM_DT config ARM: msm: Add support for MSM8974 SoC ARM: sunxi: select ARM_PSCI MAINTAINERS: Update Allwinner sunXi maintainer files ARM: sunxi: Select RESET_CONTROLLER ARM: imx: improve the comment of CCM lpm SW workaround ARM: imx: improve status check of clock gate ARM: imx: add necessary interface for pfd ARM: imx_v6_v7_defconfig: Select CONFIG_REGULATOR_PFUZE100 ARM: imx_v6_v7_defconfig: Select MX35 and MX50 device tree support ARM: imx: Add cpu frequency scaling support ARM i.MX35: Add devicetree support. ...
2014-01-23Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-armLinus Torvalds1-4/+11
Pull ARM updates from Russell King: "In this set, we have: - Refactoring of some of the old StrongARM-1100 GPIO code to make things simpler by Dmitry Eremin-Solenikov - Read-only and non-executable support for modules on ARM from Laura Abbot - Removal of unnecessary set_drvdata() calls in AMBA code - Some non-executable support for kernel lowmem mappings at the 1MB section granularity, and dumping of kernel page tables via debugfs - Some improvements for the timer/clock code on Footbridge platforms, and cleanup some of the LED code there - Fix fls/ffs() signatures to match x86 to prevent build warnings, particularly where these are used with min/max() macros - Avoid using the bootmem allocator on ARM (patches from Santosh Shilimkar) - Various asid/unaligned access updates from Will Deacon" * 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (51 commits) ARM: SMP implementations are not supposed to return from smp_ops.cpu_die() ARM: ignore memory below PHYS_OFFSET Fix select-induced Kconfig warning for ZBOOT_ROM ARM: fix ffs/fls implementations to match x86 ARM: 7935/1: sa1100: collie: add gpio-keys configuration ARM: 7932/1: bcm: Add DEBUG_LL console support ARM: 7929/1: Remove duplicate SCHED_HRTICK config option ARM: 7928/1: kconfig: select HAVE_EFFICIENT_UNALIGNED_ACCESS for CPUv6+ && MMU ARM: 7927/1: dcache: select DCACHE_WORD_ACCESS for big-endian CPUs ARM: 7926/1: mm: flesh out and fix the comments in the ASID allocator ARM: 7925/1: mm: keep track of last ASID allocation to improve bitmap searching ARM: 7924/1: mm: don't bother with reserved ttbr0 when running with LPAE ARM: PCI: add legacy IDE IRQ implementation ARM: footbridge: cleanup LEDs code ARM: pgd allocation: retry on failure ARM: footbridge: add one-shot mode for DC21285 timer ARM: footbridge: add sched_clock implementation ARM: 7922/1: l2x0: add Marvell Tauros3 support ARM: 7877/1: use built-in byte swap function ARM: 7921/1: mcpm: remove redundant dsb instructions prior to sev ...