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2018-06-05Merge branch 'for-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu Pull m68knommu updates from Greg Ungerer: "These changes all relate to converting the IO access functions for the ColdFire (and all other non-MMU m68k) platforms to use asm-generic IO instead. This makes the IO support the same on all ColdFire (regardless of MMU enabled or not) and means we can now support PCI in non-MMU mode. As a bonus these changes remove more code than they add" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: m68k: fix ColdFire PCI config reads and writes m68k: introduce iomem() macro for __iomem conversions m68k: allow ColdFire PCI bus on MMU and non-MMU configuration m68k: fix ioremapping for internal ColdFire peripherals m68k: fix read/write multi-byte IO for PCI on ColdFire m68k: don't redefine access functions if we have PCI m68k: remove old ColdFire IO access support code m68k: use io_no.h for MMU and non-MMU enabled ColdFire m68k: setup PCI support code in io_no.h m68k: group io mapping definitions and functions m68k: rework raw access macros for the non-MMU case m68k: use asm-generic/io.h for non-MMU io access functions m68k: put definition guards around virt_to_phys and phys_to_virt m68k: move *_relaxed macros into io_no.h and io_mm.h
2018-06-04Merge branch 'timers-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timers and timekeeping updates from Thomas Gleixner: - Core infrastucture work for Y2038 to address the COMPAT interfaces: + Add a new Y2038 safe __kernel_timespec and use it in the core code + Introduce config switches which allow to control the various compat mechanisms + Use the new config switch in the posix timer code to control the 32bit compat syscall implementation. - Prevent bogus selection of CPU local clocksources which causes an endless reselection loop - Remove the extra kthread in the clocksource code which has no value and just adds another level of indirection - The usual bunch of trivial updates, cleanups and fixlets all over the place - More SPDX conversions * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits) clocksource/drivers/mxs_timer: Switch to SPDX identifier clocksource/drivers/timer-imx-tpm: Switch to SPDX identifier clocksource/drivers/timer-imx-gpt: Switch to SPDX identifier clocksource/drivers/timer-imx-gpt: Remove outdated file path clocksource/drivers/arc_timer: Add comments about locking while read GFRC clocksource/drivers/mips-gic-timer: Add pr_fmt and reword pr_* messages clocksource/drivers/sprd: Fix Kconfig dependency clocksource: Move inline keyword to the beginning of function declarations timer_list: Remove unused function pointer typedef timers: Adjust a kernel-doc comment tick: Prefer a lower rating device only if it's CPU local device clocksource: Remove kthread time: Change nanosleep to safe __kernel_* types time: Change types to new y2038 safe __kernel_* types time: Fix get_timespec64() for y2038 safe compat interfaces time: Add new y2038 safe __kernel_timespec posix-timers: Make compat syscalls depend on CONFIG_COMPAT_32BIT_TIME time: Introduce CONFIG_COMPAT_32BIT_TIME time: Introduce CONFIG_64BIT_TIME in architectures compat: Enable compat_get/put_timespec64 always ...
2018-06-04Merge tag 'm68k-for-v4.18-tag1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k Pull m68k updates from Geert Uytterhoeven: - a few time-related fixes: - off-by-one calendar month on some classes of machines - Y2038 preparation - build fix for ndelay() being called with a 64-bit type - revive 64-bit get_user(), which is used by some Android code - defconfig updates - fix for a long-standing fatal bug in iounmap() on '020/030, which was actually fixed in 2.4.23, but never in 2.5.x and later - default DMA mask to avoid warning splats - minor fixes and cleanups * tag 'm68k-for-v4.18-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k: Set default dma mask for platform devices m68k/mm: Adjust VM area to be unmapped by gap size for __iounmap() m68k/defconfig: Update defconfigs for v4.17-rc3 m68k/uaccess: Revive 64-bit get_user() m68k: Implement ndelay() as an inline function to force type checking/casting zorro: Add a blank line after declarations m68k: Use read_persistent_clock64() consistently m68k: Fix off-by-one calendar month m68k: Fix style, spelling, and grammar in siginfo_build_tests() m68k/mac: Fix SWIM memory resource end address
2018-06-04Merge branch 'siginfo-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull siginfo updates from Eric Biederman: "This set of changes close the known issues with setting si_code to an invalid value, and with not fully initializing struct siginfo. There remains work to do on nds32, arc, unicore32, powerpc, arm, arm64, ia64 and x86 to get the code that generates siginfo into a simpler and more maintainable state. Most of that work involves refactoring the signal handling code and thus careful code review. Also not included is the work to shrink the in kernel version of struct siginfo. That depends on getting the number of places that directly manipulate struct siginfo under control, as it requires the introduction of struct kernel_siginfo for the in kernel things. Overall this set of changes looks like it is making good progress, and with a little luck I will be wrapping up the siginfo work next development cycle" * 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (46 commits) signal/sh: Stop gcc warning about an impossible case in do_divide_error signal/mips: Report FPE_FLTUNK for undiagnosed floating point exceptions signal/um: More carefully relay signals in relay_signal. signal: Extend siginfo_layout with SIL_FAULT_{MCEERR|BNDERR|PKUERR} signal: Remove unncessary #ifdef SEGV_PKUERR in 32bit compat code signal/signalfd: Add support for SIGSYS signal/signalfd: Remove __put_user from signalfd_copyinfo signal/xtensa: Use force_sig_fault where appropriate signal/xtensa: Consistenly use SIGBUS in do_unaligned_user signal/um: Use force_sig_fault where appropriate signal/sparc: Use force_sig_fault where appropriate signal/sparc: Use send_sig_fault where appropriate signal/sh: Use force_sig_fault where appropriate signal/s390: Use force_sig_fault where appropriate signal/riscv: Replace do_trap_siginfo with force_sig_fault signal/riscv: Use force_sig_fault where appropriate signal/parisc: Use force_sig_fault where appropriate signal/parisc: Use force_sig_mceerr where appropriate signal/openrisc: Use force_sig_fault where appropriate signal/nios2: Use force_sig_fault where appropriate ...
2018-06-04Merge tag 'dma-mapping-4.18' of git://git.infradead.org/users/hch/dma-mappingLinus Torvalds
Pull dma-mapping updates from Christoph Hellwig: - replace the force_dma flag with a dma_configure bus method. (Nipun Gupta, although one patch is іncorrectly attributed to me due to a git rebase bug) - use GFP_DMA32 more agressively in dma-direct. (Takashi Iwai) - remove PCI_DMA_BUS_IS_PHYS and rely on the dma-mapping API to do the right thing for bounce buffering. - move dma-debug initialization to common code, and apply a few cleanups to the dma-debug code. - cleanup the Kconfig mess around swiotlb selection - swiotlb comment fixup (Yisheng Xie) - a trivial swiotlb fix. (Dan Carpenter) - support swiotlb on RISC-V. (based on a patch from Palmer Dabbelt) - add a new generic dma-noncoherent dma_map_ops implementation and use it for arc, c6x and nds32. - improve scatterlist validity checking in dma-debug. (Robin Murphy) - add a struct device quirk to limit the dma-mask to 32-bit due to bridge/system issues, and switch x86 to use it instead of a local hack for VIA bridges. - handle devices without a dma_mask more gracefully in the dma-direct code. * tag 'dma-mapping-4.18' of git://git.infradead.org/users/hch/dma-mapping: (48 commits) dma-direct: don't crash on device without dma_mask nds32: use generic dma_noncoherent_ops nds32: implement the unmap_sg DMA operation nds32: consolidate DMA cache maintainance routines x86/pci-dma: switch the VIA 32-bit DMA quirk to use the struct device flag x86/pci-dma: remove the explicit nodac and allowdac option x86/pci-dma: remove the experimental forcesac boot option Documentation/x86: remove a stray reference to pci-nommu.c core, dma-direct: add a flag 32-bit dma limits dma-mapping: remove unused gfp_t parameter to arch_dma_alloc_attrs dma-debug: check scatterlist segments c6x: use generic dma_noncoherent_ops arc: use generic dma_noncoherent_ops arc: fix arc_dma_{map,unmap}_page arc: fix arc_dma_sync_sg_for_{cpu,device} arc: simplify arc_dma_sync_single_for_{cpu,device} dma-mapping: provide a generic dma-noncoherent implementation dma-mapping: simplify Kconfig dependencies riscv: add swiotlb support riscv: only enable ZONE_DMA32 for 64-bit ...
2018-05-31m68k: Set default dma mask for platform devicesFinn Thain
This avoids a WARNING splat when loading the macsonic or macmace driver. Please see commit 205e1b7f51e4 ("dma-mapping: warn when there is no coherent_dma_mask"). This implementation of arch_setup_pdev_archdata() differs from the powerpc one, in that this one avoids clobbering a device dma mask which has already been initialized. Cc: Christoph Hellwig <hch@lst.de> Cc: Greg Ungerer <gerg@linux-m68k.org> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Acked-by: Greg Ungerer <gerg@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-05-28m68k: fix ColdFire PCI config reads and writesGreg Ungerer
The ColdFire PCI configuration space access functions swap addressing regions to do their work. Just letting the read/write cycles exit the CPU core (via the ColdFire "nop" instruction) is not enough to guarantee that the address region remapping has actually completed. Insert a read back of the mapping register to be absolutely sure that the remapping has completed. This fixes an occasional boot hang during the ColdFire PCI initialization phase. Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Reviewed-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Angelo Dureghello <angelo@sysam.it>
2018-05-28m68k: introduce iomem() macro for __iomem conversionsGreg Ungerer
A lot of the ColdFire internal peripherals (clocks, timers, interrupt controllers, etc) are addressed using constants. The only problem with that is they are not type clean when used with __raw_read/__raw_write and read/write - they should be of type "void __iomem". This isn't a problem currently because the IO access functions are local macros. To switch to using the asm-generic implementations of these we need to clean up the types. Otherwise you get warnings like this: In file included from ./arch/m68k/include/asm/mcfsim.h:24:0, from arch/m68k/coldfire/intc-simr.c:20: arch/m68k/coldfire/intc-simr.c: In function ‘init_IRQ’: ./arch/m68k/include/asm/m520xsim.h:40:29: warning: passing argument 2 of ‘__raw_writeb’ makes pointer from integer without a cast [-Wint-conversion] #define MCFINTC0_SIMR (MCFICM_INTC0 + MCFINTC_SIMR) ^ arch/m68k/coldfire/intc-simr.c:182:21: note: in expansion of macro ‘MCFINTC0_SIMR’ __raw_writeb(0xff, MCFINTC0_SIMR); ^ In file included from ./arch/m68k/include/asm/io_no.h:120:0, from ./arch/m68k/include/asm/io.h:3, from ./include/linux/io.h:25, from ./include/linux/irq.h:25, from ./include/asm-generic/hardirq.h:13, from ./arch/m68k/include/asm/hardirq.h:25, from ./include/linux/hardirq.h:9, from ./include/linux/interrupt.h:13, from arch/m68k/coldfire/intc-simr.c:16: ./include/asm-generic/io.h:71:22: note: expected ‘volatile void *’ but argument is of type ‘unsigned int’ #define __raw_writeb __raw_writeb ^ ./include/asm-generic/io.h:72:20: note: in expansion of macro ‘__raw_writeb’ static inline void __raw_writeb(u8 value, volatile void __iomem *addr) ^ To start this clean up process introduce a macro, iomem(), that converts a constant address to the correct "void __iomem *" type. Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Tested-by: Angelo Dureghello <angelo@sysam.it>
2018-05-28m68k: allow ColdFire PCI bus on MMU and non-MMU configurationGreg Ungerer
Up to now we have only had support for the PCI bus when running the ColdFire CPU family with the MMU enabled. The only reason for this was the incomplete state of the IO remapping and access functions when running with the MMU disabled. Recent fixes and improvements to the ColdFire IO access code means we can now support the PCI bus when running non-MMU enabled as well. So modify the configuration support to allow it to be selected no matter what choice of MMU mode is used. Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Reviewed-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Angelo Dureghello <angelo@sysam.it>
2018-05-28m68k: fix ioremapping for internal ColdFire peripheralsGreg Ungerer
The ColdFire SoC internal peripherals are mapped into virtual address space using the ACR registers of the cache control unit. This means we are using a 1:1 physical:virtual mapping for them that does not rely on page table mappings. We can quickly determine if we are accessing an internal peripheral device given the physical or vitrual address using the same range check. The implications of this mapping is that an ioremap should return the physical address as the virtual mapping __iomem cookie as well. So fix ioremap() to deal with this on ColdFire. Of course you need to take care of this in the iounmap() path as well. Reported-by: Angelo Dureghello <angelo@sysam.it> Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Reviewed-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Angelo Dureghello <angelo@sysam.it>
2018-05-28m68k: fix read/write multi-byte IO for PCI on ColdFireGreg Ungerer
We need to treat built-in peripherals and bus based address ranges differently. Local built-in peripherals (and the ColdFire SoC parts have quite a lot of them) are always native endian - which is big endian on m68k/ColdFire. Bus based address ranges, like the PCI bus, are accessed little endian - so we need to byte swap those. So implement readw/writew and readl/writel functions to deal with memory mapped accesses correctly based on the address range being accessed. This fixes readw/writew and readl/writel so that they can be used in drivers for native SoC hardware modules (many of which are shared with other architectures (ARM in Freescale SoC parts for example). And also drivers for PCI devices. Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Tested-by: Angelo Dureghello <angelo@sysam.it>
2018-05-28m68k: don't redefine access functions if we have PCIGreg Ungerer
Some ColdFire platforms do have real PCI buses, so we should not be re-defining or otherwise mangling the IO access functions for them. So when CONFIG_PCI is true use the real io.h support. Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Reviewed-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Angelo Dureghello <angelo@sysam.it>
2018-05-28m68k: remove old ColdFire IO access support codeGreg Ungerer
All the ColdFire IO access support code has been moved to io_no.h. This means that all ColdFire support is at least now consistent no matter whether the MMU is enabled or not for them. Now that io_mm.h has reverted to only support the traditional m68k MMU enabled processors we can remove the ColdFire specific definitions. We can also remove the old ColdFire PCI bus IO access functions. The new io_no.h uses asm-generic/io.h to provide all the basic support. Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Reviewed-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Angelo Dureghello <angelo@sysam.it>
2018-05-28m68k: use io_no.h for MMU and non-MMU enabled ColdFireGreg Ungerer
Use the io_no.h IO access support for all ColdFire systems, no matter whether configured with MMU enabled or disabled. Previously there was subtle differences in IO access functions used in both cases, and these resulted in broken behavior for some drivers. As observed and reported by Angelo when using MMU enabled systems the read/write family of functions was using little endian access, while the non-MMU enabled systems were using native endian. This results in drivers that are shared across Freescale processors (for some of the common internal SoC peripherals) not working - since they are wired up for native endian access. This problem brings to light issues with PCI bus access and local peripheral access - but these are not addressed with this fix. Reported-by: Angelo Dureghello <angelo@sysam.it> Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Reviewed-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Angelo Dureghello <angelo@sysam.it>
2018-05-28m68k: setup PCI support code in io_no.hGreg Ungerer
Ultimately we want the ColdFire IO access support to be consisent no matter whether it is configured with MMU enabled or disabled. To acheive that we need to get all the ColdFire IO access support code together in one place, in this case io_no.h. The last big piece not in io_no.h is the PCI bus support functions. Define the IO mapping addresses required to use the asm-generic IO access functions. They can provide everything we need - no need for us to duplicate or have local in/out or read/write access functions. Note that this support is not active yet, since we haven't done the full switch over to using the asm-generic functions yet. And also note that we do not yet remove the old PCI functions from io_mm.h yet. Consolodating all this IO access support in a single place will make it easier in the future to enable PCI bus support for non-MMU enabled ColdFire (which we currently cannot do). Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Reviewed-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Angelo Dureghello <angelo@sysam.it>
2018-05-28m68k: group io mapping definitions and functionsGreg Ungerer
Create a new header file, kmap.h, that groups all the definitions and functions associated with the io mapping and remapping. Currently the functions are spread across raw_io.h and io_mm.h. And in the future we will want to use these in io_no.h as well. So it makes sense to move them all together into a single header file. It is named after the arch/m68k/mm/kmap.c file that actually implements many of the exported functions. Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Tested-by: Angelo Dureghello <angelo@sysam.it>
2018-05-28m68k: rework raw access macros for the non-MMU caseGreg Ungerer
The primary and fundamental access macros are really the __raw versions. So make them the actual implementation for access, and not the read/write access macros. The read/write macros and functions are built on top of the raw access (with byte swapping or other actions as required). This in itself causes no functional change right now. But it will make it easier to fix and resolve problems with PCI bus access in the future. Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Reviewed-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Angelo Dureghello <angelo@sysam.it>
2018-05-28m68k: use asm-generic/io.h for non-MMU io access functionsGreg Ungerer
There is nothing really special about the non-MMU m68k IO access functions. So we can easily switch to using the asm-generic/io.h functions. The only thing we do need to handle is that historically the m68k IO access functions for readw/readl/writew/writel use native CPU endian ordering. So for us on m68k/ColdFire that means they are big-endian. Leave the existing set of _raw_read/__raw_write and read/write macros in place to deal with them. (They are ripe for later cleanup, but that is for another patch). Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Reviewed-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Angelo Dureghello <angelo@sysam.it>
2018-05-28m68k: put definition guards around virt_to_phys and phys_to_virtGreg Ungerer
The non-MMU and ColdFire IO access functions will be moving to using the asm-generic/io.h in the near future. To make that possible we need define guards around the m68k specific virt_to_phys() and phys_to_virt() functions. Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Angelo Dureghello <angelo@sysam.it>
2018-05-28m68k: move *_relaxed macros into io_no.h and io_mm.hGreg Ungerer
Move a copy of the definitions of the *_relaxed() macros into io_no.h and io_mm.h. This precedes a change to the io_no.h file to use asm-generic/io.h. They will be removed from io_no.h at that point. Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Angelo Dureghello <angelo@sysam.it>
2018-05-24m68k/mm: Adjust VM area to be unmapped by gap size for __iounmap()Michael Schmitz
If 020/030 support is enabled, get_io_area() leaves an IO_SIZE gap between mappings which is added to the vm_struct representing the mapping. __ioremap() uses the actual requested size (after alignment), while __iounmap() is passed the size from the vm_struct. On 020/030, early termination descriptors are used to set up mappings of extent 'size', which are validated on unmapping. The unmapped gap of size IO_SIZE defeats the sanity check of the pmd tables, causing __iounmap() to loop forever on 030. On 040/060, unmapping of page table entries does not check for a valid mapping, so the umapping loop always completes there. Adjust size to be unmapped by the gap that had been added in the vm_struct prior. This fixes the hang in atari_platform_init() reported a long time ago, and a similar one reported by Finn recently (addressed by removing ioremap() use from the SWIM driver. Tested on my Falcon in 030 mode - untested but should work the same on 040/060 (the extra page tables cleared there would never have been set up anyway). Signed-off-by: Michael Schmitz <schmitzmic@gmail.com> [geert: Minor commit description improvements] [geert: This was fixed in 2.4.23, but not in 2.5.x] Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: stable@vger.kernel.org
2018-05-22m68k/defconfig: Update defconfigs for v4.17-rc3Geert Uytterhoeven
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-05-22m68k/uaccess: Revive 64-bit get_user()Geert Uytterhoeven
Revive support for 64-bit get_user(), which was disabled in commit d94af931af42152e ("[PATCH] m68k: clean up uaccess.h") due to a "broken" typeof in (then brand new) gcc-4.1. - Keep on using u64 for the temporary, as __typeof__() doesn't drop the const qualifier, - Move it into a union (like mips32 does) to get rid of the cast, as using get_user() to fetch a __user pointer would cause a "cast to pointer from integer of different size" warning otherwise. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Martijn Coenen <maco@android.com>
2018-05-22m68k: Implement ndelay() as an inline function to force type checking/castingBoris Brezillon
ndelay() is supposed to take an unsigned long, but if you define ndelay() as a macro and the caller pass an unsigned long long instead of an unsigned long, the unsigned long long to unsigned long cast is not done and we end up with an "undefined reference to `__udivdi3'" error at link time. Fix that by making ndelay() an inline function and then defining dummy ndelay() macro that redirects to the ndelay() function (it's how most archs do to implement ndelay()). Fixes: c8ee038bd148 ("m68k: Implement ndelay() based on the existing udelay() logic") Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com> [geert: Remove comment now it is no longer a macro] Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-05-22m68k: Use read_persistent_clock64() consistentlyArnd Bergmann
We have two ways of getting the current time from a platform at boot or during suspend: either using read_persistent_clock() or the rtc class operation. We never need both, so I'm hiding the read_persistent_clock variant when the generic RTC is enabled. Since read_persistent_clock() and mktime() are deprecated because of the y2038 overflow of time_t, we should use the time64_t based replacements here. Finally, the dependency on CONFIG_ARCH_USES_GETTIMEOFFSET looks completely bogus in this case, so let's remove that. It was added in commit b13b3f51ff7b ("m68k: fix inclusion of arch_gettimeoffset for non-MMU 68k classic CPU types") to deal with arch_gettimeoffset(), which has since been removed from this file and is unrelated to the RTC functions. The rtc accessors are only used by classic machines, while coldfire uses proper RTC drivers, so we can put the old ifdef back around both functions. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-05-22m68k: Fix off-by-one calendar monthFinn Thain
This fixes a bug in read_persistent_clock() which causes the system clock to lag the Real Time Clock by one month. The problem was noticed on a Mac, but theoretically it must also affect Atari, BVME6000 and Q40. The tm_mon value in the struct rtc_time passed to mach_hwclk() is zero-based, and atari_mste_hwclk(), atari_tt_hwclk(), bvme6000_hwclk(), mac_hwclk() and q40_hwclk() all make this adjustment. Unfortunately, dn_dummy_hwclk(), mvme147_hwclk(), mvme16x_hwclk(), sun3_hwclk() and sun3x_hwclk() fail to decrement tm_mon. Also m68328_hwclk() assumes a one-based tm_mon. Bring these platforms into line and fix read_persistent_clock() so it works correctly on all m68k platforms. The datasheets for the RTC devices found on the affected platforms all confirm that the year is stored as a value in the range 0-99 and the month is stored as a value in the range 1-12. Please refer to the datasheets for MC146818 (Apollo), DS1643 (MVME), ICM7170 (Sun 3) and M48T02 (Sun 3x). Reported-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-05-22m68k: Fix style, spelling, and grammar in siginfo_build_tests()Geert Uytterhoeven
Fixes: 4be33329d46f80e8 ("m68k: Verify the offsets in struct siginfo never change.") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-05-22m68k/mac: Fix SWIM memory resource end addressFinn Thain
The resource size is 0x2000 == end - start + 1. Therefore end == start + 0x2000 - 1. Cc: Laurent Vivier <lvivier@redhat.com> Cc: stable@vger.kernel.org # v4.14+ Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Acked-by: Laurent Vivier <lvivier@redhat.com> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-05-16proc: introduce proc_create_single{,_data}Christoph Hellwig
Variants of proc_create{,_data} that directly take a seq_file show callback and drastically reduces the boilerplate code in the callers. All trivial callers converted over. Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-05-07PCI: remove PCI_DMA_BUS_IS_PHYSChristoph Hellwig
This was used by the ide, scsi and networking code in the past to determine if they should bounce payloads. Now that the dma mapping always have to support dma to all physical memory (thanks to swiotlb for non-iommu systems) there is no need to this crude hack any more. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Palmer Dabbelt <palmer@sifive.com> (for riscv) Reviewed-by: Jens Axboe <axboe@kernel.dk>
2018-04-25signal/m68k: Use force_sig_fault where appropriateEric W. Biederman
Filling in struct siginfo before calling force_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper force_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls force_sig_info. In short about a 5 line reduction in code for every time force_sig_info is called, which makes the calling function clearer. Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: linux-m68k@lists.linux-m68k.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-25signal: Ensure every siginfo we send has all bits initializedEric W. Biederman
Call clear_siginfo to ensure every stack allocated siginfo is properly initialized before being passed to the signal sending functions. Note: It is not safe to depend on C initializers to initialize struct siginfo on the stack because C is allowed to skip holes when initializing a structure. The initialization of struct siginfo in tracehook_report_syscall_exit was moved from the helper user_single_step_siginfo into tracehook_report_syscall_exit itself, to make it clear that the local variable siginfo gets fully initialized. In a few cases the scope of struct siginfo has been reduced to make it clear that siginfo siginfo is not used on other paths in the function in which it is declared. Instances of using memset to initialize siginfo have been replaced with calls clear_siginfo for clarity. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-19time: Add an asm-generic/compat.h fileArnd Bergmann
We have a couple of files that try to include asm/compat.h on architectures where this is available. Those should generally use the higher-level linux/compat.h file, but that in turn fails to include asm/compat.h when CONFIG_COMPAT is disabled, unless we can provide that header on all architectures. This adds the asm/compat.h for all remaining architectures to simplify the dependencies. Architectures that are getting removed in linux-4.17 are not changed here, to avoid needless conflicts with the removal patches. Those architectures are broken by this patch, but we have already shown that they have no users. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2018-04-09Merge branch 'for-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu Pull m68knommu update from Greg Ungerer: "Only a single fix to set the DMA masks in the ColdFire FEC platform data structure. This stops the warning from dma-mapping.h at boot time" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: m68k: set dma and coherent masks for platform FEC ethernets
2018-04-05Merge branch 'siginfo-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull siginfo updates from Eric Biederman: "The work on cleaning up and getting the bugs out of siginfo generation was largely stalled this round. The progress that was made was the definition of FPE_FLTUNK. Which is usable to fix many of the cases where siginfo generation is erroneously generating SI_USER by setting si_code to 0, that has recently been tagged as FPE_FIXME. You already have the change by way of the arm64 tree as that definition was pulled into the arm64 tree to allow fixing the problem there. What remains is the second round of fixing for what I thought was a trivial change to the struct siginfo when put the union in _sigfault where it belongs. Do to historical reasons 32bit m68k only ensures that pointers are 2 byte aligned. So I have added a m68k test case made of BUILD_BUG_ONs to verify I have this fix correct and possibly catch problems, and I have computed the number of bytes of padding needed for the _addr_bnd and _addr_pkey cases and just use an array of characters that size. For pure paranoia I have written the code so if there is an architecture out there that does not perform any alignment of structures it should still work. With the removal of all of the stale arechitectures this cycle future work on cleaning up struct siginfo should be much easier. Almost all of the conflicting si_code definitions have been removed with the removal of (blackfin, tile, and frv). Plus some of the most difficult to test cases have simply been removed from the tree. Which means that with a little luck copy_siginfo_to_user can become a light weight wrapper around copy_to_user in the next cycle" * 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: m68k: Verify the offsets in struct siginfo never change. signal: Correct the offset of si_pkey and si_lower in struct siginfo on m68k
2018-04-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds
Pull networking updates from David Miller: 1) Support offloading wireless authentication to userspace via NL80211_CMD_EXTERNAL_AUTH, from Srinivas Dasari. 2) A lot of work on network namespace setup/teardown from Kirill Tkhai. Setup and cleanup of namespaces now all run asynchronously and thus performance is significantly increased. 3) Add rx/tx timestamping support to mv88e6xxx driver, from Brandon Streiff. 4) Support zerocopy on RDS sockets, from Sowmini Varadhan. 5) Use denser instruction encoding in x86 eBPF JIT, from Daniel Borkmann. 6) Support hw offload of vlan filtering in mvpp2 dreiver, from Maxime Chevallier. 7) Support grafting of child qdiscs in mlxsw driver, from Nogah Frankel. 8) Add packet forwarding tests to selftests, from Ido Schimmel. 9) Deal with sub-optimal GSO packets better in BBR congestion control, from Eric Dumazet. 10) Support 5-tuple hashing in ipv6 multipath routing, from David Ahern. 11) Add path MTU tests to selftests, from Stefano Brivio. 12) Various bits of IPSEC offloading support for mlx5, from Aviad Yehezkel, Yossi Kuperman, and Saeed Mahameed. 13) Support RSS spreading on ntuple filters in SFC driver, from Edward Cree. 14) Lots of sockmap work from John Fastabend. Applications can use eBPF to filter sendmsg and sendpage operations. 15) In-kernel receive TLS support, from Dave Watson. 16) Add XDP support to ixgbevf, this is significant because it should allow optimized XDP usage in various cloud environments. From Tony Nguyen. 17) Add new Intel E800 series "ice" ethernet driver, from Anirudh Venkataramanan et al. 18) IP fragmentation match offload support in nfp driver, from Pieter Jansen van Vuuren. 19) Support XDP redirect in i40e driver, from Björn Töpel. 20) Add BPF_RAW_TRACEPOINT program type for accessing the arguments of tracepoints in their raw form, from Alexei Starovoitov. 21) Lots of striding RQ improvements to mlx5 driver with many performance improvements, from Tariq Toukan. 22) Use rhashtable for inet frag reassembly, from Eric Dumazet. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1678 commits) net: mvneta: improve suspend/resume net: mvneta: split rxq/txq init and txq deinit into SW and HW parts ipv6: frags: fix /proc/sys/net/ipv6/ip6frag_low_thresh net: bgmac: Fix endian access in bgmac_dma_tx_ring_free() net: bgmac: Correctly annotate register space route: check sysctl_fib_multipath_use_neigh earlier than hash fix typo in command value in drivers/net/phy/mdio-bitbang. sky2: Increase D3 delay to sky2 stops working after suspend net/mlx5e: Set EQE based as default TX interrupt moderation mode ibmvnic: Disable irqs before exiting reset from closed state net: sched: do not emit messages while holding spinlock vlan: also check phy_driver ts_info for vlan's real device Bluetooth: Mark expected switch fall-throughs Bluetooth: Set HCI_QUIRK_SIMULTANEOUS_DISCOVERY for BTUSB_QCA_ROME Bluetooth: btrsi: remove unused including <linux/version.h> Bluetooth: hci_bcm: Remove DMI quirk for the MINIX Z83-4 sh_eth: kill useless check in __sh_eth_get_regs() sh_eth: add sh_eth_cpu_data::no_xdfar flag ipv6: factorize sk_wmem_alloc updates done by __ip6_append_data() ipv4: factorize sk_wmem_alloc updates done by __ip_append_data() ...
2018-04-02Merge branch 'syscalls-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux Pull removal of in-kernel calls to syscalls from Dominik Brodowski: "System calls are interaction points between userspace and the kernel. Therefore, system call functions such as sys_xyzzy() or compat_sys_xyzzy() should only be called from userspace via the syscall table, but not from elsewhere in the kernel. At least on 64-bit x86, it will likely be a hard requirement from v4.17 onwards to not call system call functions in the kernel: It is better to use use a different calling convention for system calls there, where struct pt_regs is decoded on-the-fly in a syscall wrapper which then hands processing over to the actual syscall function. This means that only those parameters which are actually needed for a specific syscall are passed on during syscall entry, instead of filling in six CPU registers with random user space content all the time (which may cause serious trouble down the call chain). Those x86-specific patches will be pushed through the x86 tree in the near future. Moreover, rules on how data may be accessed may differ between kernel data and user data. This is another reason why calling sys_xyzzy() is generally a bad idea, and -- at most -- acceptable in arch-specific code. This patchset removes all in-kernel calls to syscall functions in the kernel with the exception of arch/. On top of this, it cleans up the three places where many syscalls are referenced or prototyped, namely kernel/sys_ni.c, include/linux/syscalls.h and include/linux/compat.h" * 'syscalls-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux: (109 commits) bpf: whitelist all syscalls for error injection kernel/sys_ni: remove {sys_,sys_compat} from cond_syscall definitions kernel/sys_ni: sort cond_syscall() entries syscalls/x86: auto-create compat_sys_*() prototypes syscalls: sort syscall prototypes in include/linux/compat.h net: remove compat_sys_*() prototypes from net/compat.h syscalls: sort syscall prototypes in include/linux/syscalls.h kexec: move sys_kexec_load() prototype to syscalls.h x86/sigreturn: use SYSCALL_DEFINE0 x86: fix sys_sigreturn() return type to be long, not unsigned long x86/ioport: add ksys_ioperm() helper; remove in-kernel calls to sys_ioperm() mm: add ksys_readahead() helper; remove in-kernel calls to sys_readahead() mm: add ksys_mmap_pgoff() helper; remove in-kernel calls to sys_mmap_pgoff() mm: add ksys_fadvise64_64() helper; remove in-kernel call to sys_fadvise64_64() fs: add ksys_fallocate() wrapper; remove in-kernel calls to sys_fallocate() fs: add ksys_p{read,write}64() helpers; remove in-kernel calls to syscalls fs: add ksys_truncate() wrapper; remove in-kernel calls to sys_truncate() fs: add ksys_sync_file_range helper(); remove in-kernel calls to syscall kernel: add ksys_setsid() helper; remove in-kernel call to sys_setsid() kernel: add ksys_unshare() helper; remove in-kernel calls to sys_unshare() ...
2018-04-02m68k: Verify the offsets in struct siginfo never change.Eric W. Biederman
A change to the generic struct siginfo accidentally changed the offset of si_offset. Add build time checks to ensure the offsets of all known fields in struct siginfo never change. This copies the form of similar changes on x86. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-02mm: add ksys_mmap_pgoff() helper; remove in-kernel calls to sys_mmap_pgoff()Dominik Brodowski
Using this helper allows us to avoid the in-kernel calls to the sys_mmap_pgoff() syscall. The ksys_ prefix denotes that this function is meant as a drop-in replacement for the syscall. In particular, it uses the same calling convention as sys_mmap_pgoff(). This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-mm@kvack.org Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
2018-03-28m68k: set dma and coherent masks for platform FEC ethernetsGreg Ungerer
As of commit 205e1b7f51e4 ("dma-mapping: warn when there is no coherent_dma_mask") the Freescale FEC driver is issuing the following warning on driver initialization on ColdFire systems: WARNING: CPU: 0 PID: 1 at ./include/linux/dma-mapping.h:516 0x40159e20 Modules linked in: CPU: 0 PID: 1 Comm: swapper Not tainted 4.16.0-rc7-dirty #4 Stack from 41833dd8: 41833dd8 40259c53 40025534 40279e26 00000003 00000000 4004e514 41827000 400255de 40244e42 00000204 40159e20 00000009 00000000 00000000 4024531d 40159e20 40244e42 00000204 00000000 00000000 00000000 00000007 00000000 00000000 40279e26 4028d040 40226576 4003ae88 40279e26 418273f6 41833ef8 7fffffff 418273f2 41867028 4003c9a2 4180ac6c 00000004 41833f8c 4013e71c 40279e1c 40279e26 40226c16 4013ced2 40279e26 40279e58 4028d040 00000000 Call Trace: [<40025534>] 0x40025534 [<4004e514>] 0x4004e514 [<400255de>] 0x400255de [<40159e20>] 0x40159e20 [<40159e20>] 0x40159e20 It is not fatal, the driver and the system continue to function normally. As per the warning the coherent_dma_mask is not set on this device. There is nothing special about the DMA memory coherency on this hardware so we can just set the mask to 32bits in the platform data for the FEC ethernet devices. Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
2018-03-26m68k/mac: Remove bogus "FIXME" commentFinn Thain
This code works fine. The comment is misleading so remove it. Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-03-26m68k/mac: Enable RTC for 100-series PowerBooksFinn Thain
According to Apple's Developer Notes, all of the early PowerBook models have their RTC connected to VIA1. Use the VIA clock ops as appropriate. This was tested on a PowerBook 170. Don't use the VIA ops when not appropriate. Calling unimplemented clock or PRAM getter or setter ops can now result in an error instead of failing silently. Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-03-26m68k/mac: Clean up whitespace and remove redundant parenthesesFinn Thain
Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-03-19m68k/defconfig: Update defconfigs for v4.16-rc5Geert Uytterhoeven
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-03-19m68k/time: Stop validating rtc_time in .read_timeAlexandre Belloni
The RTC core is always calling rtc_valid_tm after the read_time callback. It is not necessary to call it just before returning from the callback. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-03-19m68k/mm: Stop printing the virtual memory layoutGeert Uytterhoeven
Since commit ad67b74d2469d9b8 ("printk: hash addresses printed with %p"), the virtual memory layout printed during boot up contains "ptrval" instead of actual addresses: Memory: 268040K/276480K available (2979K kernel code, 310K rwdata, 784K rodata, 144K init, 172K bss, 8440K reserved, 0K cma-reserved) Virtual kernel memory layout: vector : 0x003d2e74 - 0x003d3274 ( 1 KiB) kmap : 0xd0000000 - 0xf0000000 ( 512 MiB) vmalloc : 0x11800000 - 0xd0000000 (3048 MiB) lowmem : 0x00000000 - 0x11000000 ( 272 MiB) .init : 0x(ptrval) - 0x(ptrval) ( 144 KiB) .text : 0x(ptrval) - 0x(ptrval) (2980 KiB) .data : 0x(ptrval) - 0x(ptrval) (1095 KiB) .bss : 0x(ptrval) - 0x(ptrval) ( 173 KiB) Instead of changing the printing to "%px", and leaking virtual memory layout information again, just remove the printing completely, cfr. e.g. commit 071929dbdd865f77 ("arm64: Stop printing the virtual memory layout"). All interesting information (actual section sizes) is already printed by mem_init_print_info() just above anyway. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-03-19macintosh/via-pmu68k: Initialize PMU driver with setup_arch and arch_initcallFinn Thain
The PMU watchdog will power down the system if the kernel is slow to start up, e.g. due to unpacking a large initrd. The powerpc version of this driver (via-pmu.c) has a solution for the same problem. It uses this call sequence: setup_arch find_via_pmu init_pmu ... arch_initcall via_pmu_start Bring via-pmu68k.c into line with via-pmu.c to fix this issue. Cc: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-03-19m68k/mac: Fix apparent race condition in Baboon interrupt dispatchFinn Thain
The algorithm used in baboon_irq() appears to be subject to a race condition: an IRQ flag could be lost if asserted between the MOV instructions from and to the interrupt flag register. However, testing shows that the write to the flag register has no effect. Rewrite this loop to remove the apparent race condition. No-one seems to know how to clear Baboon IRQ flags, or whether that's even possible, so add a comment about this. Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-03-19m68k/mac: Enable PDMA support for PowerBook 190Finn Thain
Stan's tests showed that PDMA improves sequential read performance by a factor of 5 on a PowerBook 190. Last time I tried this on a PowerBook 520 it didn't work, so let's not enable it there until it can be tested with the present mac_scsi driver. Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-03-01net/mac89x0: Convert to platform_driverFinn Thain
Apparently these Dayna cards don't have a pseudoslot declaration ROM which means they can't be probed like NuBus cards. Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: David S. Miller <davem@davemloft.net>