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2016-05-01xtensa: clear all DBREAKC registers on startMax Filippov1-1/+1
commit 7de7ac785ae18a2cdc78d7560f48e3213d9ea0ab upstream. There are XCHAL_NUM_DBREAK registers, clear them all. This also fixes cryptic assembler error message with binutils 2.25 when XCHAL_NUM_DBREAK is 0: as: out of memory allocating 18446744073709551575 bytes after a total of 495616 bytes Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
2016-05-01xtensa: ISS: don't hang if stdin EOF is reachedMax Filippov1-4/+6
commit 362014c8d9d51d504c167c44ac280169457732be upstream. Simulator stdin may be connected to a file, when its end is reached kernel hangs in infinite loop inside rs_poll, because simc_poll always signals that descriptor 0 is readable and simc_read always returns 0. Check simc_read return value and exit loop if it's not positive. Also don't rewind polling timer if it's zero. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
2015-12-13xtensa: nommu: provide _PAGE_CHG_MASK definitionMax Filippov1-0/+1
commit 972c55bf70c04b3deeecec022c8ca64136350655 upstream. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
2015-12-13xtensa: fix secondary core boot in SMPMax Filippov5-16/+19
commit ab45fb145096799dabd18afc58bb5f97171017cd upstream. There are multiple factors adding to the issue in different configurations: - commit 17290231df16eeee ("xtensa: add fixup for double exception raised in window overflow") added function window_overflow_restore_a0_fixup to double exception vector overlapping reset vector location of secondary processor cores. - on MMUv2 cores RESET_VECTOR1_VADDR may point to uncached kernel memory making code overlapping depend on cache type and size, so that without cache or with WT cache reset vector code overwrites double exception code, making issue even harder to detect. - on MMUv3 cores RESET_VECTOR1_VADDR may point to unmapped area, as MMUv3 cores change virtual address map to match MMUv2 layout, but reset vector virtual address is given for the original MMUv3 mapping. - physical memory region of the secondary reset vector is not reserved in the physical memory map, and thus may be allocated and overwritten at arbitrary moment. Fix it as follows: - move window_overflow_restore_a0_fixup code to .text section. - define RESET_VECTOR1_VADDR so that it points to reset vector in the cacheable MMUv2 map for cores with MMU. - reserve reset vector region in the physical memory map. Drop separate literal section and build mxhead.S with text section literals. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
2015-12-13xtensa: fixes for configs without loop optionMax Filippov7-9/+20
commit 5029615e25dc5040beb065f36743c127a8e51497 upstream. Build-time fixes: - make lbeg/lend/lcount save/restore conditional on kernel entry; - don't clear lcount in platform_restart functions unconditionally. Run-time fixes: - use correct end of range register in __endla paired with __loopt, not the unused temporary register. This fixes .bss zero-initialization. Update comments in asmmacro.h; - don't clobber a10 in the usercopy that leads to access to unmapped memory. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> [ luis: backported to 3.16: adjusted context ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
2015-09-28xtensa: fix kernel register spillingMax Filippov2-12/+21
commit 77d6273e79e3a86552fcf10cdd31a69b46ed2ce6 upstream. call12 can't be safely used as the first call in the inline function, because the compiler does not extend the stack frame of the bounding function accordingly, which may result in corruption of local variables. If a call needs to be done, do call8 first followed by call12. For pure assembly code in _switch_to increase stack frame size of the bounding function. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
2015-09-28xtensa: fix threadptr reload on return to userspaceMax Filippov1-1/+2
commit 4229fb12a03e5da5882b420b0aa4a02e77447b86 upstream. Userspace return code may skip restoring THREADPTR register if there are no registers that need to be zeroed. This leads to spurious failures in libc NPTL tests. Always restore THREADPTR on return to userspace. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
2015-05-06xtensa: ISS: fix locking in TAP network adapterMax Filippov1-14/+15
commit 24e94454c8cb6a13634f5a2f5a01da53a546a58d upstream. - don't lock lp->lock in the iss_net_timer for the call of iss_net_poll, it will lock it itself; - invert order of lp->lock and opened_lock acquisition in the iss_net_open to make it consistent with iss_net_poll; - replace spin_lock with spin_lock_bh when acquiring locks used in iss_net_timer from non-atomic context; - replace spin_lock_irqsave with spin_lock_bh in the iss_net_start_xmit as the driver doesn't use lp->lock in the hard IRQ context; - replace __SPIN_LOCK_UNLOCKED(lp.lock) with spin_lock_init, otherwise lockdep is unhappy about using non-static key. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
2015-05-04xtensa: provide __NR_sync_file_range2 instead of __NR_sync_file_rangeMax Filippov1-1/+1
commit 01e84c70fe40c8111f960987bcf7f931842e6d07 upstream. xtensa actually uses sync_file_range2 implementation, so it should define __NR_sync_file_range2 as other architectures that use that function. That fixes userspace interface (that apparently never worked) and avoids special-casing xtensa in libc implementations. See the thread ending at http://lists.busybox.net/pipermail/uclibc/2015-February/048833.html for more details. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
2015-05-04xtensa: xtfpga: fix hardware lockup caused by LCD driverMax Filippov5-25/+81
commit 4949009eb8d40a441dcddcd96e101e77d31cf1b2 upstream. LCD driver is always built for the XTFPGA platform, but its base address is not configurable, and is wrong for ML605/KC705. Its initialization locks up KC705 board hardware. Make the whole driver optional, and its base address and bus width configurable. Implement 4-bit bus access method. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> [ luis: backported to 3.16: adjusted context ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
2015-02-04vm: add VM_FAULT_SIGSEGV handling supportLinus Torvalds1-0/+2
commit 33692f27597fcab536d7cbbcc8f52905133e4aa7 upstream. The core VM already knows about VM_FAULT_SIGBUS, but cannot return a "you should SIGSEGV" error, because the SIGSEGV case was generally handled by the caller - usually the architecture fault handler. That results in lots of duplication - all the architecture fault handlers end up doing very similar "look up vma, check permissions, do retries etc" - but it generally works. However, there are cases where the VM actually wants to SIGSEGV, and applications _expect_ SIGSEGV. In particular, when accessing the stack guard page, libsigsegv expects a SIGSEGV. And it usually got one, because the stack growth is handled by that duplicated architecture fault handler. However, when the generic VM layer started propagating the error return from the stack expansion in commit fee7e49d4514 ("mm: propagate error from stack expansion even for guard page"), that now exposed the existing VM_FAULT_SIGBUS result to user space. And user space really expected SIGSEGV, not SIGBUS. To fix that case, we need to add a VM_FAULT_SIGSEGV, and teach all those duplicate architecture fault handlers about it. They all already have the code to handle SIGSEGV, so it's about just tying that new return value to the existing code, but it's all a bit annoying. This is the mindless minimal patch to do this. A more extensive patch would be to try to gather up the mostly shared fault handling logic into one generic helper routine, and long-term we really should do that cleanup. Just from this patch, you can generally see that most architectures just copied (directly or indirectly) the old x86 way of doing things, but in the meantime that original x86 model has been improved to hold the VM semaphore for shorter times etc and to handle VM_FAULT_RETRY and other "newer" things, so it would be a good idea to bring all those improvements to the generic case and teach other architectures about them too. Reported-and-tested-by: Takashi Iwai <tiwai@suse.de> Tested-by: Jan Engelhardt <jengelh@inai.de> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> # "s390 still compiles and boots" Cc: linux-arch@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> [ luis: backported to 3.16: - file renamed: arch/powerpc/mm/copro_fault.c -> arch/powerpc/platforms/cell/spu_fault.c - dropped changes to arch/nios2/mm/fault.c ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
2015-01-15xtensa: fix kmap_prot definitionMax Filippov1-1/+1
commit ff009ab6d4d4581b62fa055ab6233133aca25ab8 upstream. Replace PAGE_KERNEL with PAGE_KERNEL_EXEC to allow copy_to_user_page invalidate icache for pages mapped with kmap. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
2014-11-20xtensa: re-wire umount syscall to sys_oldumountMax Filippov1-1/+2
commit 2651cc6974d47fc43bef1cd8cd26966e4f5ba306 upstream. Userspace actually passes single parameter (path name) to the umount syscall, so new umount just fails. Fix it by requesting old umount syscall implementation and re-wiring umount to it. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
2014-10-06xtensa: fix a6 and a7 handling in fast_syscall_xtensaMax Filippov1-7/+5
commit d1b6ba82a50cecf94be540a3a153aa89d97511a0 upstream. Remove restoring a6 on some return paths and instead modify and restore it in a single place, using symbolic name. Correctly restore a7 from PT_AREG7 in case of illegal a6 value. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-10-06xtensa: fix TLBTEMP_BASE_2 region handling in fast_second_level_missMax Filippov2-2/+7
commit 7128039fe2dd3d59da9e4ffa036f3aaa3ba87b9f upstream. Current definition of TLBTEMP_BASE_2 is always 32K above the TLBTEMP_BASE_1, whereas fast_second_level_miss handler for the TLBTEMP region analyzes virtual address bit (PAGE_SHIFT + DCACHE_ALIAS_ORDER) to determine TLBTEMP region where the fault happened. The size of the TLBTEMP region is also checked incorrectly: not 64K, but twice data cache way size (whicht may as well be less than the instruction cache way size). Fix TLBTEMP_BASE_2 to be TLBTEMP_BASE_1 + data cache way size. Provide TLBTEMP_SIZE that is a greater of doubled data cache way size or the instruction cache way size, and use it to determine if the second level TLB miss occured in the TLBTEMP region. Practical occurence of page faults in the TLBTEMP area is extremely rare, this code can be tested by deletion of all w[di]tlb instructions in the tlbtemp_mapping region. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-10-06xtensa: fix access to THREAD_RA/THREAD_SP/THREAD_DSMax Filippov2-4/+13
commit 52247123749cc3cbc30168b33ad8c69515c96d23 upstream. With SMP and a lot of debug options enabled task_struct::thread gets out of reach of s32i/l32i instructions with base pointing at task_struct, breaking build with the following messages: arch/xtensa/kernel/entry.S: Assembler messages: arch/xtensa/kernel/entry.S:1002: Error: operand 3 of 'l32i.n' has invalid value '1048' arch/xtensa/kernel/entry.S:1831: Error: operand 3 of 's32i.n' has invalid value '1040' arch/xtensa/kernel/entry.S:1832: Error: operand 3 of 's32i.n' has invalid value '1044' Change base to point to task_struct::thread in such cases. Don't use a10 in _switch_to to save/restore prev pointer as a2 is not clobbered. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-10-06xtensa: fix address checks in dma_{alloc,free}_coherentAlan Douglas1-6/+6
commit 1ca49463c44c970b1ab1d71b0f268bfdf8427a7e upstream. Virtual address is translated to the XCHAL_KSEG_CACHED region in the dma_free_coherent, but is checked to be in the 0...XCHAL_KSEG_SIZE range. Change check for end of the range from 'addr >= X' to 'addr > X - 1' to handle the case of X == 0. Replace 'if (C) BUG();' construct with 'BUG_ON(C);'. Signed-off-by: Alan Douglas <adouglas@cadence.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-10-06xtensa: replace IOCTL code definitions with constantsMax Filippov1-9/+10
commit f61bf8e7d19e0a3456a7a9ed97c399e4353698dc upstream. This fixes userspace code that builds on other architectures but fails on xtensa due to references to structures that other architectures don't refer to. E.g. this fixes the following issue with python-2.7.8: python-2.7.8/Modules/termios.c:861:25: error: invalid application of 'sizeof' to incomplete type 'struct serial_multiport_struct' {"TIOCSERGETMULTI", TIOCSERGETMULTI}, python-2.7.8/Modules/termios.c:870:25: error: invalid application of 'sizeof' to incomplete type 'struct serial_multiport_struct' {"TIOCSERSETMULTI", TIOCSERSETMULTI}, python-2.7.8/Modules/termios.c:900:24: error: invalid application of 'sizeof' to incomplete type 'struct tty_struct' {"TIOCTTYGSTRUCT", TIOCTTYGSTRUCT}, Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-16Merge tag 'xtensa-for-next-20140715' of ↵Chris Zankel3-25/+139
git://github.com/jcmvbkbc/linux-xtensa into for_next Xtensa fixes for 3.16: - resolve FIXMEs in double exception handler for window overflow. This fix makes native building of linux on xtensa host possible; - fix sysmem region removal issue introduced in 3.15.
2014-06-09xtensa: fix sysmem reservation at the end of existing blockMax Filippov1-1/+1
When sysmem reservation occurs exactly at the end of an existing block that block is deleted, because it is incorrectly included in the range of memblocks to remove. Fix that by skipping such block. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-06-09xtensa: add fixup for double exception raised in window overflowMax Filippov2-24/+138
There are two FIXMEs in the double exception handler 'for the extremely unlikely case'. This case gets hit by gcc during kernel build once in a few hours, resulting in an unrecoverable exception condition. Provide missing fixup routine to handle this case. Double exception literals now need 8 more bytes, add them to the linker script. Also replace bbsi instructions with bbsi.l as we're branching depending on 8th and 7th LSB-based bits of exception address. This may be tested by adding the explicit DTLB invalidation to window overflow handlers, like the following: --- a/arch/xtensa/kernel/vectors.S +++ b/arch/xtensa/kernel/vectors.S @@ -592,6 +592,14 @@ ENDPROC(_WindowUnderflow4) ENTRY_ALIGN64(_WindowOverflow8) s32e a0, a9, -16 + bbsi.l a9, 31, 1f + rsr a0, ccount + bbsi.l a0, 4, 1f + pdtlb a0, a9 + idtlb a0 + movi a0, 9 + idtlb a0 +1: l32e a0, a1, -12 s32e a2, a9, -8 s32e a1, a9, -12 Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-06-06Merge tag 'arm64-upstream' of ↵Linus Torvalds1-10/+4
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux into next Pull arm64 updates from Catalin Marinas: - Optimised assembly string/memory routines (based on the AArch64 Cortex Strings library contributed to glibc but re-licensed under GPLv2) - Optimised crypto algorithms making use of the ARMv8 crypto extensions (together with kernel API for using FPSIMD instructions in interrupt context) - Ftrace support - CPU topology parsing from DT - ESR_EL1 (Exception Syndrome Register) exposed to user space signal handlers for SIGSEGV/SIGBUS (useful to emulation tools like Qemu) - 1GB section linear mapping if applicable - Barriers usage clean-up - Default pgprot clean-up Conflicts as per Catalin. * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (57 commits) arm64: kernel: initialize broadcast hrtimer based clock event device arm64: ftrace: Add system call tracepoint arm64: ftrace: Add CALLER_ADDRx macros arm64: ftrace: Add dynamic ftrace support arm64: Add ftrace support ftrace: Add arm64 support to recordmcount arm64: Add 'notrace' attribute to unwind_frame() for ftrace arm64: add __ASSEMBLY__ in asm/insn.h arm64: Fix linker script entry point arm64: lib: Implement optimized string length routines arm64: lib: Implement optimized string compare routines arm64: lib: Implement optimized memcmp routine arm64: lib: Implement optimized memset routine arm64: lib: Implement optimized memmove routine arm64: lib: Implement optimized memcpy routine arm64: defconfig: enable a few more common/useful options in defconfig ftrace: Make CALLER_ADDRx macros more generic arm64: Fix deadlock scenario with smp_send_stop() arm64: Fix machine_shutdown() definition arm64: Support arch_irq_work_raise() via self IPIs ...
2014-06-04Merge tag 'devicetree-for-3.16' of ↵Linus Torvalds1-2/+1
git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux into next Pull DeviceTree updates from Rob Herring: - Another round of clean-up of FDT related code in architecture code. This removes knowledge of internal FDT details from most architectures except powerpc. - Conversion of kernel's custom FDT parsing code to use libfdt. - DT based initialization for generic serial earlycon. The introduction of generic serial earlycon support went in through the tty tree. - Improve the platform device naming for DT probed devices to ensure unique naming and use parent names instead of a global index. - Fix a race condition in of_update_property. - Unify the various linker section OF match tables and fix several function prototype errors. - Update platform_get_irq_byname to work in deferred probe cases. - 2 binding doc updates * tag 'devicetree-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (58 commits) of: handle NULL node in next_child iterators of/irq: provide more wrappers for !CONFIG_OF devicetree: bindings: Document micrel vendor prefix dt: bindings: dwc2: fix required value for the phy-names property of_pci_irq: kill useless variable in of_irq_parse_pci() of/irq: do irq resolution in platform_get_irq_byname() of: Add a testcase for of_find_node_by_path() of: Make of_find_node_by_path() handle /aliases of: Create unlocked version of for_each_child_of_node() lib: add glibc style strchrnul() variant of: Handle memory@0 node on PPC32 only pci/of: Remove dead code of: fix race between search and remove in of_update_property() of: Use NULL for pointers of: Stop naming platform_device using dcr address of: Ensure unique names without sacrificing determinism tty/serial: pl011: add DT based earlycon support of/fdt: add FDT serial scanning for earlycon of/fdt: add FDT address translation support serial: earlycon: add DT support ...
2014-06-03Merge branch 'locking-core-for-linus' of ↵Linus Torvalds3-9/+5
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next Pull core locking updates from Ingo Molnar: "The main changes in this cycle were: - reduced/streamlined smp_mb__*() interface that allows more usecases and makes the existing ones less buggy, especially in rarer architectures - add rwsem implementation comments - bump up lockdep limits" * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits) rwsem: Add comments to explain the meaning of the rwsem's count field lockdep: Increase static allocations arch: Mass conversion of smp_mb__*() arch,doc: Convert smp_mb__*() arch,xtensa: Convert smp_mb__*() arch,x86: Convert smp_mb__*() arch,tile: Convert smp_mb__*() arch,sparc: Convert smp_mb__*() arch,sh: Convert smp_mb__*() arch,score: Convert smp_mb__*() arch,s390: Convert smp_mb__*() arch,powerpc: Convert smp_mb__*() arch,parisc: Convert smp_mb__*() arch,openrisc: Convert smp_mb__*() arch,mn10300: Convert smp_mb__*() arch,mips: Convert smp_mb__*() arch,metag: Convert smp_mb__*() arch,m68k: Convert smp_mb__*() arch,m32r: Convert smp_mb__*() arch,ia64: Convert smp_mb__*() ...
2014-06-02Merge tag 'pci-v3.16-changes' of ↵Linus Torvalds1-5/+0
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci into next Pull PCI changes from Bjorn Helgaas: "Enumeration - Notify driver before and after device reset (Keith Busch) - Use reset notification in NVMe (Keith Busch) NUMA - Warn if we have to guess host bridge node information (Myron Stowe) - Work around AMD Fam15h BIOSes that fail to provide _PXM (Suravee Suthikulpanit) - Clean up and mark early_root_info_init() as deprecated (Suravee Suthikulpanit) Driver binding - Add "driver_override" for force specific binding (Alex Williamson) - Fail "new_id" addition for devices we already know about (Bandan Das) Resource management - Support BAR sizes up to 8GB (Nikhil Rao, Alan Cox) - Don't move IORESOURCE_PCI_FIXED resources (Bjorn Helgaas) - Mark SBx00 HPET BAR as IORESOURCE_PCI_FIXED (Bjorn Helgaas) - Fail safely if we can't handle BARs larger than 4GB (Bjorn Helgaas) - Reject BAR above 4GB if dma_addr_t is too small (Bjorn Helgaas) - Don't convert BAR address to resource if dma_addr_t is too small (Bjorn Helgaas) - Don't set BAR to zero if dma_addr_t is too small (Bjorn Helgaas) - Don't print anything while decoding is disabled (Bjorn Helgaas) - Don't add disabled subtractive decode bus resources (Bjorn Helgaas) - Add resource allocation comments (Bjorn Helgaas) - Restrict 64-bit prefetchable bridge windows to 64-bit resources (Yinghai Lu) - Assign i82875p_edac PCI resources before adding device (Yinghai Lu) PCI device hotplug - Remove unnecessary "dev->bus" test (Bjorn Helgaas) - Use PCI_EXP_SLTCAP_PSN define (Bjorn Helgaas) - Fix rphahp endianess issues (Laurent Dufour) - Acknowledge spurious "cmd completed" event (Rajat Jain) - Allow hotplug service drivers to operate in polling mode (Rajat Jain) - Fix cpqphp possible NULL dereference (Rickard Strandqvist) MSI - Replace pci_enable_msi_block() by pci_enable_msi_exact() (Alexander Gordeev) - Replace pci_enable_msix() by pci_enable_msix_exact() (Alexander Gordeev) - Simplify populate_msi_sysfs() (Jan Beulich) Virtualization - Add Intel Patsburg (X79) root port ACS quirk (Alex Williamson) - Mark RTL8110SC INTx masking as broken (Alex Williamson) Generic host bridge driver - Add generic PCI host controller driver (Will Deacon) Freescale i.MX6 - Use new clock names (Lucas Stach) - Drop old IRQ mapping (Lucas Stach) - Remove optional (and unused) IRQs (Lucas Stach) - Add support for MSI (Lucas Stach) - Fix imx6_add_pcie_port() section mismatch warning (Sachin Kamat) Renesas R-Car - Add gen2 device tree support (Ben Dooks) - Use new OF interrupt mapping when possible (Lucas Stach) - Add PCIe driver (Phil Edworthy) - Add PCIe MSI support (Phil Edworthy) - Add PCIe device tree bindings (Phil Edworthy) Samsung Exynos - Remove unnecessary OOM messages (Jingoo Han) - Fix add_pcie_port() section mismatch warning (Sachin Kamat) Synopsys DesignWare - Make MSI ISR shared IRQ aware (Lucas Stach) Miscellaneous - Check for broken config space aliasing (Alex Williamson) - Update email address (Ben Hutchings) - Fix Broadcom CNB20LE unintended sign extension (Bjorn Helgaas) - Fix incorrect vgaarb conditional in WARN_ON() (Bjorn Helgaas) - Remove unnecessary __ref annotations (Bjorn Helgaas) - Add arch/x86/kernel/quirks.c to MAINTAINERS PCI file patterns (Bjorn Helgaas) - Fix use of uninitialized MPS value (Bjorn Helgaas) - Tidy x86/gart messages (Bjorn Helgaas) - Fix return value from pci_user_{read,write}_config_*() (Gavin Shan) - Turn pcibios_penalize_isa_irq() into a weak function (Hanjun Guo) - Remove unused serial device IDs (Jean Delvare) - Use designated initialization in PCI_VDEVICE (Mark Rustad) - Fix powerpc NULL dereference in pci_root_buses traversal (Mike Qiu) - Configure MPS on ARM (Murali Karicheri) - Remove unnecessary includes of <linux/init.h> (Paul Gortmaker) - Move Open Firmware devspec attribute to PCI common code (Sebastian Ott) - Use pdev->dev.groups for attribute creation on s390 (Sebastian Ott) - Remove pcibios_add_platform_entries() (Sebastian Ott) - Add new ID for Intel GPU "spurious interrupt" quirk (Thomas Jarosch) - Rename pci_is_bridge() to pci_has_subordinate() (Yijing Wang) - Add and use new pci_is_bridge() interface (Yijing Wang) - Make pci_bus_add_device() void (Yijing Wang) DMA API - Clarify physical/bus address distinction in docs (Bjorn Helgaas) - Fix typos in docs (Emilio López) - Update dma_pool_create ()and dma_pool_alloc() descriptions (Gioh Kim) - Change dma_declare_coherent_memory() CPU address to phys_addr_t (Bjorn Helgaas) - Pass GAPSPCI_DMA_BASE CPU & bus address to dma_declare_coherent_memory() (Bjorn Helgaas)" * tag 'pci-v3.16-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (92 commits) MAINTAINERS: Add generic PCI host controller driver PCI: generic: Add generic PCI host controller driver PCI: imx6: Add support for MSI PCI: designware: Make MSI ISR shared IRQ aware PCI: imx6: Remove optional (and unused) IRQs PCI: imx6: Drop old IRQ mapping PCI: imx6: Use new clock names i82875p_edac: Assign PCI resources before adding device ARM/PCI: Call pcie_bus_configure_settings() to set MPS PCI: imx6: Fix imx6_add_pcie_port() section mismatch warning PCI: Make pci_bus_add_device() void PCI: exynos: Fix add_pcie_port() section mismatch warning PCI: Introduce new device binding path using pci_dev.driver_override PCI: rcar: Add gen2 device tree support PCI: cpqphp: Fix possible null pointer dereference PCI: rcar: Add R-Car PCIe device tree bindings PCI: rcar: Add MSI support for PCIe PCI: rcar: Add Renesas R-Car PCIe driver PCI: Fix return value from pci_user_{read,write}_config_*() PCI: exynos: Remove unnecessary OOM messages ...
2014-05-28PCI: Turn pcibios_penalize_isa_irq() into a weak functionHanjun Guo1-5/+0
pcibios_penalize_isa_irq() is only implemented by x86 now, and legacy ISA is not used by some architectures. Make pcibios_penalize_isa_irq() a __weak function to simplify the code. This removes the need for new platforms to add stub implementations of pcibios_penalize_isa_irq(). [bhelgaas: changelog, comments] Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2014-05-21ftrace: Make CALLER_ADDRx macros more genericAKASHI Takahiro1-10/+4
Most archs with HAVE_ARCH_CALLER_ADDR have pretty much the same definitions of CALLER_ADDRx(n). Instead of duplicating the code for all the archs, define a ftrace_return_address0() and ftrace_return_address(n) that can be overwritten by the archs if they need to do something different. Instead of 7 macros in every arch, we now only have at most 2 (and actually only 1 as ftrace_return_address0() should be the same for all archs). The CALLER_ADDRx(n) will now be defined in linux/ftrace.h and use the ftrace_return_address*(n?) macros. This removes a lot of the duplicate code. Link: http://lkml.kernel.org/p/1400585464-30333-1-git-send-email-takahiro.akashi@linaro.org Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-05-14Merge branch 'dt-bus-name' into for-nextRob Herring23-167/+691
2014-05-06Merge tag 'xtensa-next-20140503' of git://github.com/czankel/xtensa-linuxLinus Torvalds23-167/+691
Pull Xtensa fixes from Chris Zankel: - Fixes allmodconfig, allnoconfig builds - Adds highmem support - Enables build-time exception table sorting. * tag 'xtensa-next-20140503' of git://github.com/czankel/xtensa-linux: xtensa: ISS: don't depend on CONFIG_TTY xtensa: xt2000: drop redundant sysmem initialization xtensa: add support for KC705 xtensa: xtfpga: introduce SoC I/O bus xtensa: add HIGHMEM support xtensa: optimize local_flush_tlb_kernel_range xtensa: dump sysmem from the bootmem_init xtensa: handle memmap kernel option xtensa: keep sysmem banks ordered in mem_reserve xtensa: keep sysmem banks ordered in add_sysmem_bank xtensa: split bootparam and kernel meminfo xtensa: enable sorting extable at build time xtensa: export __{invalidate,flush}_dcache_range xtensa: Export __invalidate_icache_range
2014-05-05xtensa: ISS: don't depend on CONFIG_TTYMax Filippov2-2/+2
Build console support only when CONFIG_TTY is selected. This restores ISS as the default platform for allnoconfig builds. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-04-30of/fdt: update of_get_flat_dt_prop in prep for libfdtRob Herring1-1/+1
Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-30of/fdt: consolidate built-in dtb section variablesRob Herring1-1/+0
Unify the various architectures __dtb_start and __dtb_end definitions moving them into of_fdt.h. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: James Hogan <james.hogan@imgtec.com> Tested-by: Michal Simek <michal.simek@xilinx.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: linux-metag@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux@lists.openrisc.net Cc: linux-xtensa@linux-xtensa.org Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-18arch,xtensa: Convert smp_mb__*()Peter Zijlstra3-9/+5
Xtensa SMP has compare-and-swap which is fully serializing, therefore its exising smp_mb__{before,after}_clear_bit() appear unduly heavy. Implement the new barriers as barrier(). Signed-off-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Link: http://lkml.kernel.org/n/tip-e9rqjxr1m1ejsob9p433kmji@git.kernel.org Cc: Chris Zankel <chris@zankel.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: linux-kernel@vger.kernel.org Cc: linux-xtensa@linux-xtensa.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-04-13Merge branch 'for-linus' of ↵Linus Torvalds2-2/+0
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs updates from Al Viro: "The first vfs pile, with deep apologies for being very late in this window. Assorted cleanups and fixes, plus a large preparatory part of iov_iter work. There's a lot more of that, but it'll probably go into the next merge window - it *does* shape up nicely, removes a lot of boilerplate, gets rid of locking inconsistencie between aio_write and splice_write and I hope to get Kent's direct-io rewrite merged into the same queue, but some of the stuff after this point is having (mostly trivial) conflicts with the things already merged into mainline and with some I want more testing. This one passes LTP and xfstests without regressions, in addition to usual beating. BTW, readahead02 in ltp syscalls testsuite has started giving failures since "mm/readahead.c: fix readahead failure for memoryless NUMA nodes and limit readahead pages" - might be a false positive, might be a real regression..." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits) missing bits of "splice: fix racy pipe->buffers uses" cifs: fix the race in cifs_writev() ceph_sync_{,direct_}write: fix an oops on ceph_osdc_new_request() failure kill generic_file_buffered_write() ocfs2_file_aio_write(): switch to generic_perform_write() ceph_aio_write(): switch to generic_perform_write() xfs_file_buffered_aio_write(): switch to generic_perform_write() export generic_perform_write(), start getting rid of generic_file_buffer_write() generic_file_direct_write(): get rid of ppos argument btrfs_file_aio_write(): get rid of ppos kill the 5th argument of generic_file_buffered_write() kill the 4th argument of __generic_file_aio_write() lustre: don't open-code kernel_recvmsg() ocfs2: don't open-code kernel_recvmsg() drbd: don't open-code kernel_recvmsg() constify blk_rq_map_user_iov() and friends lustre: switch to kernel_sendmsg() ocfs2: don't open-code kernel_sendmsg() take iov_iter stuff to mm/iov_iter.c process_vm_access: tidy up a bit ...
2014-04-10xtensa: xt2000: drop redundant sysmem initializationMax Filippov1-11/+1
sysmem structure initialization in xt2000 platform_init is identical to the one done in init_arch just before the call to platform_init. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-04-08Kconfig: rename HAS_IOPORT to HAS_IOPORT_MAPUwe Kleine-König3-4/+4
If the renamed symbol is defined lib/iomap.c implements ioport_map and ioport_unmap and currently (nearly) all platforms define the port accessor functions outb/inb and friend unconditionally. So HAS_IOPORT_MAP is the better name for this. Consequently NO_IOPORT is renamed to NO_IOPORT_MAP. The motivation for this change is to reintroduce a symbol HAS_IOPORT that signals if outb/int et al are available. I will address that at least one merge window later though to keep surprises to a minimum and catch new introductions of (HAS|NO)_IOPORT. The changes in this commit were done using: $ git grep -l -E '(NO|HAS)_IOPORT' | xargs perl -p -i -e 's/\b((?:CONFIG_)?(?:NO|HAS)_IOPORT)\b/$1_MAP/' Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-06xtensa: add support for KC705Max Filippov2-0/+39
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-04-06xtensa: xtfpga: introduce SoC I/O busMax Filippov3-53/+64
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-04-06xtensa: add HIGHMEM supportMax Filippov9-16/+270
Introduce fixmap area just below the vmalloc region. Use it for atomic mapping of high memory pages. High memory on cores with cache aliasing is not supported and is still to be implemented. Fail build for such configurations for now. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-04-06xtensa: optimize local_flush_tlb_kernel_rangeMax Filippov3-7/+34
Don't flush whole TLB if only a small kernel range is requested. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-04-02get rid of DEBUG_WRITECOUNTAl Viro2-2/+0
it only makes control flow in __fput() and friends more convoluted. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-04-02xtensa: dump sysmem from the bootmem_initMax Filippov1-0/+12
Debug dump of physical memory configuration. Useful for inspection of resulting memory map, esp. in the presence of memmap= kernel option. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-04-02xtensa: handle memmap kernel optionMax Filippov2-0/+51
This option is useful for reserving memory regions for secondary cores in AMP configurations. Implement the following memmap variants: - memmap=nn[KMG]@ss[KMG]: force usage of a specific region of memory; - memmap=nn[KMG]$ss[KMG]: mark specified memory as reserved; - memmap=nn[KMG]: set end of memory. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-04-02xtensa: keep sysmem banks ordered in mem_reserveMax Filippov2-33/+51
Rewrite mem_reserve so that it keeps bank order. Also make its return code more traditional. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-04-02xtensa: keep sysmem banks ordered in add_sysmem_bankMax Filippov2-5/+103
Rewrite add_sysmem_bank so that it keeps bank order and merges adjacent/overlapping banks. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-04-02xtensa: split bootparam and kernel meminfoMax Filippov4-45/+61
Bootparam meminfo is a bootloader ABI, kernel meminfo is for the kernel bookkeeping, keep them separate. Kernel doesn't care of memory region types, so drop the type field and don't pass it to add_sysmem_bank. Move kernel sysmem structures and prototypes to asm/sysmem.h and sysmem variable and add_sysmem_bank to mm/init.c Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-04-02xtensa: enable sorting extable at build timeMax Filippov1-0/+1
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Acked-by: David Daney <ddaney.cavm@gmail.com>
2014-04-02xtensa: export __{invalidate,flush}_dcache_rangeMax Filippov1-0/+6
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-04-02xtensa: Export __invalidate_icache_rangeGeert Uytterhoeven1-0/+1
When modular code calls flush_icache_range(): ERROR: "__invalidate_icache_range" [drivers/misc/lkdtm.ko] undefined! make[1]: *** [__modpost] Error 1 Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-04-01Merge branch 'irq-core-for-linus' of ↵Linus Torvalds1-19/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq code updates from Thomas Gleixner: "The irq department proudly presents: - Another tree wide sweep of irq infrastructure abuse. Clear winner of the trainwreck engineering contest was: #include "../../../kernel/irq/settings.h" - Tree wide update of irq_set_affinity() callbacks which miss a cpu online check when picking a single cpu out of the affinity mask. - Tree wide consolidation of interrupt statistics. - Updates to the threaded interrupt infrastructure to allow explicit wakeup of the interrupt thread and a variant of synchronize_irq() which synchronizes only the hard interrupt handler. Both are needed to replace the homebrewn thread handling in the mmc/sdhci code. - New irq chip callbacks to allow proper support for GPIO based irqs. The GPIO based interrupts need to request/release GPIO resources from request/free_irq. - A few new ARM interrupt chips. No revolutionary new hardware, just differently wreckaged variations of the scheme. - Small improvments, cleanups and updates all over the place" I was hoping that that trainwreck engineering contest was a April Fools' joke. But no. * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (68 commits) irqchip: sun7i/sun6i: Disable NMI before registering the handler ARM: sun7i/sun6i: dts: Fix IRQ number for sun6i NMI controller ARM: sun7i/sun6i: irqchip: Update the documentation ARM: sun7i/sun6i: dts: Add NMI irqchip support ARM: sun7i/sun6i: irqchip: Add irqchip driver for NMI controller genirq: Export symbol no_action() arm: omap: Fix typo in ams-delta-fiq.c m68k: atari: Fix the last kernel_stat.h fallout irqchip: sun4i: Simplify sun4i_irq_ack irqchip: sun4i: Use handle_fasteoi_irq for all interrupts genirq: procfs: Make smp_affinity values go+r softirq: Add linux/irq.h to make it compile again m68k: amiga: Add linux/irq.h to make it compile again irqchip: sun4i: Don't ack IRQs > 0, fix acking of IRQ 0 irqchip: sun4i: Fix a comment about mask register initialization irqchip: sun4i: Fix irq 0 not working genirq: Add a new IRQCHIP_EOI_THREADED flag genirq: Document IRQCHIP_ONESHOT_SAFE flag ARM: sunxi: dt: Convert to the new irq controller compatibles irqchip: sunxi: Change compatibles ...
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