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* Merge tag 'xtensa-20180129' of git://github.com/jcmvbkbc/linux-xtensaLinus Torvalds2018-01-292-10/+8
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull Xtensa updates from Max Filippov: - add SSP support - add KASAN support - improvements to xtensa-specific assembly: - use ENTRY and ENDPROC consistently - clean up and unify word alignment macros - clean up and unify fixup marking - use 'call' instead of 'callx' where possible - various cleanups: - consiolidate kernel stack size related definitions - replace #ifdef'fed/commented out debug printk statements with pr_debug - use struct exc_table instead of flat array for exception handling data - build kernel with -mtext-section-literals; simplify xtensa linker script - fix futex_atomic_cmpxchg_inatomic() * tag 'xtensa-20180129' of git://github.com/jcmvbkbc/linux-xtensa: (21 commits) xtensa: fix futex_atomic_cmpxchg_inatomic xtensa: shut up gcc-8 warnings xtensa: print kernel sections info in mem_init xtensa: use generic strncpy_from_user with KASAN xtensa: use __memset in __xtensa_clear_user xtensa: add support for KASAN xtensa: move fixmap and kmap just above the KSEG xtensa: don't clear swapper_pg_dir in paging_init xtensa: extract init_kio xtensa: implement early_trap_init xtensa: clean up exception handling structure xtensa: clean up custom-controlled debug output xtensa: enable stack protector xtensa: print hardware config ID on startup xtensa: consolidate kernel stack size related definitions xtensa: clean up functions in assembly code xtensa: clean up word alignment macros in assembly code xtensa: clean up fixups in assembly code xtensa: use call instead of callx in assembly code xtensa: build kernel with text-section-literals ...
| * xtensa: clean up custom-controlled debug outputMax Filippov2017-12-162-10/+8
| | | | | | | | | | | | | | Replace #ifdef'fed/commented out debug printk statements with pr_debug. Replace printk statements with pr_* equivalents. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-blockLinus Torvalds2017-11-141-2/+2
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull core block layer updates from Jens Axboe: "This is the main pull request for block storage for 4.15-rc1. Nothing out of the ordinary in here, and no API changes or anything like that. Just various new features for drivers, core changes, etc. In particular, this pull request contains: - A patch series from Bart, closing the whole on blk/scsi-mq queue quescing. - A series from Christoph, building towards hidden gendisks (for multipath) and ability to move bio chains around. - NVMe - Support for native multipath for NVMe (Christoph). - Userspace notifications for AENs (Keith). - Command side-effects support (Keith). - SGL support (Chaitanya Kulkarni) - FC fixes and improvements (James Smart) - Lots of fixes and tweaks (Various) - bcache - New maintainer (Michael Lyle) - Writeback control improvements (Michael) - Various fixes (Coly, Elena, Eric, Liang, et al) - lightnvm updates, mostly centered around the pblk interface (Javier, Hans, and Rakesh). - Removal of unused bio/bvec kmap atomic interfaces (me, Christoph) - Writeback series that fix the much discussed hundreds of millions of sync-all units. This goes all the way, as discussed previously (me). - Fix for missing wakeup on writeback timer adjustments (Yafang Shao). - Fix laptop mode on blk-mq (me). - {mq,name} tupple lookup for IO schedulers, allowing us to have alias names. This means you can use 'deadline' on both !mq and on mq (where it's called mq-deadline). (me). - blktrace race fix, oopsing on sg load (me). - blk-mq optimizations (me). - Obscure waitqueue race fix for kyber (Omar). - NBD fixes (Josef). - Disable writeback throttling by default on bfq, like we do on cfq (Luca Miccio). - Series from Ming that enable us to treat flush requests on blk-mq like any other request. This is a really nice cleanup. - Series from Ming that improves merging on blk-mq with schedulers, getting us closer to flipping the switch on scsi-mq again. - BFQ updates (Paolo). - blk-mq atomic flags memory ordering fixes (Peter Z). - Loop cgroup support (Shaohua). - Lots of minor fixes from lots of different folks, both for core and driver code" * 'for-4.15/block' of git://git.kernel.dk/linux-block: (294 commits) nvme: fix visibility of "uuid" ns attribute blk-mq: fixup some comment typos and lengths ide: ide-atapi: fix compile error with defining macro DEBUG blk-mq: improve tag waiting setup for non-shared tags brd: remove unused brd_mutex blk-mq: only run the hardware queue if IO is pending block: avoid null pointer dereference on null disk fs: guard_bio_eod() needs to consider partitions xtensa/simdisk: fix compile error nvme: expose subsys attribute to sysfs nvme: create 'slaves' and 'holders' entries for hidden controllers block: create 'slaves' and 'holders' entries for hidden gendisks nvme: also expose the namespace identification sysfs files for mpath nodes nvme: implement multipath access to nvme subsystems nvme: track shared namespaces nvme: introduce a nvme_ns_ids structure nvme: track subsystems block, nvme: Introduce blk_mq_req_flags_t block, scsi: Make SCSI quiesce and resume work reliably block: Add the QUEUE_FLAG_PREEMPT_ONLY request queue flag ...
| * | xtensa/simdisk: fix compile errorChristoph Hellwig2017-11-101-1/+1
| | | | | | | | | | | | | | | | | | Fixes: d004a5e7d4dd ("block: remove __bio_kmap_atomic") Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
| * | block: remove __bio_kmap_atomicChristoph Hellwig2017-11-101-2/+2
| |/ | | | | | | | | | | | | | | | | | | | | | | This helper doesn't buy us much over calling kmap_atomic directly. In fact in the only caller it does a bit of useless work as the caller already has the bvec at hand, and said caller would even buggy for a multi-segment bio due to the use of this helper. So just remove it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | Merge branch 'timers-core-for-linus' of ↵Linus Torvalds2017-11-132-13/+9
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer updates from Thomas Gleixner: "Yet another big pile of changes: - More year 2038 work from Arnd slowly reaching the point where we need to think about the syscalls themself. - A new timer function which allows to conditionally (re)arm a timer only when it's either not running or the new expiry time is sooner than the armed expiry time. This allows to use a single timer for multiple timeout requirements w/o caring about the first expiry time at the call site. - A new NMI safe accessor to clock real time for the printk timestamp work. Can be used by tracing, perf as well if required. - A large number of timer setup conversions from Kees which got collected here because either maintainers requested so or they simply got ignored. As Kees pointed out already there are a few trivial merge conflicts and some redundant commits which was unavoidable due to the size of this conversion effort. - Avoid a redundant iteration in the timer wheel softirq processing. - Provide a mechanism to treat RTC implementations depending on their hardware properties, i.e. don't inflict the write at the 0.5 seconds boundary which originates from the PC CMOS RTC to all RTCs. No functional change as drivers need to be updated separately. - The usual small updates to core code clocksource drivers. Nothing really exciting" * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (111 commits) timers: Add a function to start/reduce a timer pstore: Use ktime_get_real_fast_ns() instead of __getnstimeofday() timer: Prepare to change all DEFINE_TIMER() callbacks netfilter: ipvs: Convert timers to use timer_setup() scsi: qla2xxx: Convert timers to use timer_setup() block/aoe: discover_timer: Convert timers to use timer_setup() ide: Convert timers to use timer_setup() drbd: Convert timers to use timer_setup() mailbox: Convert timers to use timer_setup() crypto: Convert timers to use timer_setup() drivers/pcmcia: omap1: Fix error in automated timer conversion ARM: footbridge: Fix typo in timer conversion drivers/sgi-xp: Convert timers to use timer_setup() drivers/pcmcia: Convert timers to use timer_setup() drivers/memstick: Convert timers to use timer_setup() drivers/macintosh: Convert timers to use timer_setup() hwrng/xgene-rng: Convert timers to use timer_setup() auxdisplay: Convert timers to use timer_setup() sparc/led: Convert timers to use timer_setup() mips: ip22/32: Convert timers to use timer_setup() ...
| * | xtensa: Convert timers to use timer_setup()Kees Cook2017-11-022-13/+9
| |/ | | | | | | | | | | | | | | | | | | | | In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: linux-xtensa@linux-xtensa.org Signed-off-by: Kees Cook <keescook@chromium.org>
* / locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns ↵Mark Rutland2017-10-251-7/+7
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | to READ_ONCE()/WRITE_ONCE() Please do not apply this to mainline directly, instead please re-run the coccinelle script shown below and apply its output. For several reasons, it is desirable to use {READ,WRITE}_ONCE() in preference to ACCESS_ONCE(), and new code is expected to use one of the former. So far, there's been no reason to change most existing uses of ACCESS_ONCE(), as these aren't harmful, and changing them results in churn. However, for some features, the read/write distinction is critical to correct operation. To distinguish these cases, separate read/write accessors must be used. This patch migrates (most) remaining ACCESS_ONCE() instances to {READ,WRITE}_ONCE(), using the following coccinelle script: ---- // Convert trivial ACCESS_ONCE() uses to equivalent READ_ONCE() and // WRITE_ONCE() // $ make coccicheck COCCI=/home/mark/once.cocci SPFLAGS="--include-headers" MODE=patch virtual patch @ depends on patch @ expression E1, E2; @@ - ACCESS_ONCE(E1) = E2 + WRITE_ONCE(E1, E2) @ depends on patch @ expression E; @@ - ACCESS_ONCE(E) + READ_ONCE(E) ---- Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: davem@davemloft.net Cc: linux-arch@vger.kernel.org Cc: mpe@ellerman.id.au Cc: shuah@kernel.org Cc: snitzer@redhat.com Cc: thor.thayer@linux.intel.com Cc: tj@kernel.org Cc: viro@zeniv.linux.org.uk Cc: will.deacon@arm.com Link: http://lkml.kernel.org/r/1508792849-3115-19-git-send-email-paulmck@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* Merge tag 'xtensa-20170612' of git://github.com/jcmvbkbc/linux-xtensaLinus Torvalds2017-06-133-9/+10
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull Xtensa fixes from Max Filippov: - don't use linux IRQ #0 in legacy irq domains: fixes timer interrupt assignment when it's hardware IRQ # is 0 and the kernel is built w/o device tree support - reduce reservation size for double exception vector literals from 48 to 20 bytes: fixes build on cores with small user exception vector - cleanups: use kmalloc_array instead of kmalloc in simdisk_init and seq_puts instead of seq_printf in c_show. * tag 'xtensa-20170612' of git://github.com/jcmvbkbc/linux-xtensa: xtensa: don't use linux IRQ #0 xtensa: reduce double exception literal reservation xtensa: ISS: Use kmalloc_array() in simdisk_init() xtensa: Use seq_puts() in c_show()
| * xtensa: don't use linux IRQ #0Max Filippov2017-06-052-7/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Linux IRQ #0 is reserved for error reporting and may not be used. Increase NR_IRQS for one additional slot and increase irq_domain_add_legacy parameter first_irq value to 1, so that linux IRQ #0 is not associated with hardware IRQ #0 in legacy IRQ domains. Introduce macro XTENSA_PIC_LINUX_IRQ for static translation of xtensa PIC hardware IRQ # to linux IRQ #. Use this macro in XTFPGA platform data definitions. This fixes inability to use hardware IRQ #0 in configurations that don't use device tree and allows for non-identity mapping between linux IRQ # and hardware IRQ #. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: ISS: Use kmalloc_array() in simdisk_init()Markus Elfring2017-05-081-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * A multiplication for the size determination of a memory allocation indicated that an array data structure should be processed. Thus use the corresponding function "kmalloc_array". This issue was detected by using the Coccinelle software. * Replace the specification of a data type by a pointer dereference to make the corresponding size determination a bit safer according to the Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | xtensa: ISS: update kernel command line in platform_setupMax Filippov2017-03-131-0/+21
| | | | | | | | | | | | | | | | | | Move platform_setup call higher in initialization sequence so that it could change kernel command line. Check command line passed to simulator in ISS platform_stup and update kernel command line if there's anything. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | xtensa: ISS: add argc/argv simcall definitionsMax Filippov2017-03-131-0/+20
| | | | | | | | | | | | | | | | | | | | | | There are three simcalls implemented by ISS and QEMU related to argc/argv processing: SYS_iss_argc (get number of command line arguments), SYS_iss_argv_size (get size of command line argument block) and SYS_iss_set_argv (copy command line arguments to virtual guest address). Add definitions for these calls to iss/include/platform/simcall.h Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | xtensa: ISS: cleanup setup.cMax Filippov2017-03-131-20/+2
|/ | | | | | | Drop commented out code, unused extern definition, extra blank lines. Rewrite iss_panic_block initialization in C99 style. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* Replace <asm/uaccess.h> with <linux/uaccess.h> globallyLinus Torvalds2016-12-242-2/+2
| | | | | | | | | | | | | This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge tag 'xtensa-20161005' of git://github.com/jcmvbkbc/linux-xtensaLinus Torvalds2016-10-055-117/+54
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull Xtensa updates from Max Filippov: "Updates for the xtensa architecture. It is a combined set of patches for 4.8 that never got to the mainline and new patches for 4.9. - add new kernel memory layouts for MMUv3 cores: with 256MB and 512MB KSEG size, starting at physical address other than 0 - make kernel load address configurable - clean up kernel memory layout macros - drop sysmem early allocator and switch to memblock - enable kmemleak and memory reservation from the device tree - wire up new syscalls: userfaultfd, membarrier, mlock2, copy_file_range, preadv2 and pwritev2 - add new platform: Cadence Configurable System Platform (CSP) and new core variant for it: xt_lnx - rearrange CCOUNT calibration code, make most of it generic - improve machine reset code (XTFPGA now reboots reliably with MMUv3 cores) - provide default memmap command line option for configurations without device tree support - ISS fixes: simdisk is now capable of using highmem pages, panic correctly terminates simulator" * tag 'xtensa-20161005' of git://github.com/jcmvbkbc/linux-xtensa: (24 commits) xtensa: disable MMU initialization option on MMUv2 cores xtensa: add default memmap and mmio32native options to defconfigs xtensa: add default memmap option to common_defconfig xtensa: add default memmap option to iss_defconfig xtensa: ISS: allow simdisk to use high memory buffers xtensa: ISS: define simc_exit and use it instead of inline asm xtensa: xtfpga: group platform_* functions together xtensa: rearrange CCOUNT calibration xtensa: xtfpga: use clock provider, don't update DT xtensa: Tweak xuartps UART driver Rx watermark for Cadence CSP config. xtensa: initialize MMU before jumping to reset vector xtensa: fix icountlevel setting in cpu_reset xtensa: extract common CPU reset code into separate function xtensa: Added Cadence CSP kernel configuration for Xtensa xtensa: fix default kernel load address xtensa: wire up new syscalls xtensa: support reserved-memory DT node xtensa: drop sysmem and switch to memblock xtensa: minimize use of PLATFORM_DEFAULT_MEM_{ADDR,SIZE} xtensa: cleanup MMU setup and kernel layout macros ...
| * xtensa: ISS: allow simdisk to use high memory buffersMax Filippov2016-09-201-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | ISS kernel by default has only low memory. But it may be configured to support high memory and started in a simulator with more than 128M of RAM. Simdisk driver in such configuration can get IO request with a high memory page. There may be no TLB entry for that page, only page table entry. However simulators don't do pagewalking, so such IO request will fail. Touch IO buffer in the buffer read/write loop so that a TLB entry is likely there when read or write simcall is invoked. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: ISS: define simc_exit and use it instead of inline asmMax Filippov2016-09-202-3/+10
| | | | | | | | | | | | | | | | A number of ISS platform functions use inline assembly to invoke simulator exit, not all correctly. Define simc_exit(exit_code) and use it instead of inline assembly. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: xtfpga: group platform_* functions togetherMax Filippov2016-09-201-24/+22
| | | | | | | | | | | | | | Group platform_* functions together and turn two separate #ifdef/#ifndef blocks into single #ifdef/#else. No functional changes. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: rearrange CCOUNT calibrationMax Filippov2016-09-201-38/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | DT-enabled kernel should have a CPU node connected to a clock. This clock is the CCOUNT clock. Use old platform_calibrate_ccount call as a fallback when CPU node cannot be found or has no clock and in non-DT-enabled configurations. Drop no longer needed code that updates CPU clock-frequency property in the DT; drop DT-related code from the platform_calibrate_ccount too. Move of_clk_init to the top of time_init, so that clocks are initialized before CCOUNT calibration is attempted. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: xtfpga: use clock provider, don't update DTMax Filippov2016-09-201-4/+29
| | | | | | | | | | | | | | | | | | | | | | Instead of querying hardcoded FPGA frequency register and then updating clock-frequency property in specificly named DT nodes in machine setup code register a clock provider that returns fixed-rate clock, configured by register specified in DT. This way we have less magic/hardcoded names and use more existing common clock framework code. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Tested-by: Guenter Roeck <linux@roeck-us.net>
| * xtensa: extract common CPU reset code into separate functionMax Filippov2016-09-113-60/+3
| | | | | | | | | | | | | | | | platform_restart implementatations do the same thing to reset CPU. Don't duplicate that code, move it to a function and call it from platform_restart. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | tty: stop defining STD_COM_FLAGS in driversJiri Slaby2016-06-251-1/+0
|/ | | | | | | | | | | STD_COM_FLAGS is mostly a bad name for what the drivers thinks it is. Stop using it and pass the flags directly. cyclades defines it as 0, so we do not assign anything to freshly tty_port_init'ed structure. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* treewide: replace dev->trans_start update with helperFlorian Westphal2016-05-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace all trans_start updates with netif_trans_update helper. change was done via spatch: struct net_device *d; @@ - d->trans_start = jiffies + netif_trans_update(d) Compile tested only. Cc: user-mode-linux-devel@lists.sourceforge.net Cc: linux-xtensa@linux-xtensa.org Cc: linux1394-devel@lists.sourceforge.net Cc: linux-rdma@vger.kernel.org Cc: netdev@vger.kernel.org Cc: MPT-FusionLinux.pdl@broadcom.com Cc: linux-scsi@vger.kernel.org Cc: linux-can@vger.kernel.org Cc: linux-parisc@vger.kernel.org Cc: linux-omap@vger.kernel.org Cc: linux-hams@vger.kernel.org Cc: linux-usb@vger.kernel.org Cc: linux-wireless@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: devel@driverdev.osuosl.org Cc: b.a.t.m.a.n@lists.open-mesh.org Cc: linux-bluetooth@vger.kernel.org Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Acked-by: Mugunthan V N <mugunthanvnm@ti.com> Acked-by: Antonio Quartulli <a@unstable.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge tag 'xtensa-next-20160320' of git://github.com/czankel/xtensa-linuxLinus Torvalds2016-03-202-5/+8
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull Xtensa updates from Chris Zankel: "Xtensa improvements for 4.6: - control whether perf IRQ is treated as NMI from Kconfig - implement ioremap for regions outside KIO segment - fix ISS serial port behaviour when EOF is reached - fix preemption in {clear,copy}_user_highpage - fix endianness issues for XTFPGA devices, big-endian cores are now fully functional - clean up debug infrastructure and add support for hardware breakpoints and watchpoints - add processor configurations for Three Core HiFi-2 MX and HiFi3 cpus" * tag 'xtensa-next-20160320' of git://github.com/czankel/xtensa-linux: xtensa: add test_kc705_hifi variant xtensa: add Three Core HiFi-2 MX Variant. xtensa: support hardware breakpoints/watchpoints xtensa: use context structure for debug exceptions xtensa: remove remaining non-functional KGDB bits xtensa: clear all DBREAKC registers on start xtensa: xtfpga: fix earlycon endianness xtensa: xtfpga: fix i2c controller register width and endianness xtensa: xtfpga: fix ethernet controller endianness xtensa: xtfpga: fix serial port register width and endianness xtensa: define CONFIG_CPU_{BIG,LITTLE}_ENDIAN xtensa: fix preemption in {clear,copy}_user_highpage xtensa: ISS: don't hang if stdin EOF is reached xtensa: support ioremap for memory outside KIO region xtensa: use XTENSA_INT_LEVEL macro in asm/timex.h xtensa: make fake NMI configurable
| * xtensa: xtfpga: fix ethernet controller endiannessMax Filippov2016-03-111-0/+1
| | | | | | | | | | | | | | | | Ethernet controller is attached to XTFPGA boards as native endian device, mark it as such in DTS and pass correct endianness in platform data. This makes network functional on big-endian CPUs. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: xtfpga: fix serial port register width and endiannessMax Filippov2016-03-111-1/+1
| | | | | | | | | | | | | | | | | | Serial port is attached to XTFPGA boards as native endian device, mark it as such in DTS and pass correct endianness in platform data. Set register width in DTS to 4, this way it matches the platform data and works correctly on big-endian CPUs. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: ISS: don't hang if stdin EOF is reachedMax Filippov2016-03-111-4/+6
| | | | | | | | | | | | | | | | | | | | | | 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. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | TTY: xtensa/iss/console, remove unused _INLINE_ definitionJiri Slaby2016-02-061-4/+0
| | | | | | | | | | | | | | | | | | | | | | This is a remnant from the dark age. Nobody uses the macro now, so remove. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: <linux-xtensa@linux-xtensa.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | serial: Fix ASYNC_* => UPF_* flags misusePeter Hurley2016-01-281-1/+1
| | | | | | | | | | | | | | | | The UPF_* flags are the correct values to use for struct uart_port and struct old_serial_port/SERIAL_PORT_DFNS. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | convert a bunch of open-coded instances of memdup_user_nul()Al Viro2016-01-041-9/+3
|/ | | | | | | A _lot_ of ->write() instances were open-coding it; some are converted to memdup_user_nul(), a lot more remain... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'for-4.4/io-poll' of git://git.kernel.dk/linux-blockLinus Torvalds2015-11-101-1/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull block IO poll support from Jens Axboe: "Various groups have been doing experimentation around IO polling for (really) fast devices. The code has been reviewed and has been sitting on the side for a few releases, but this is now good enough for coordinated benchmarking and further experimentation. Currently O_DIRECT sync read/write are supported. A framework is in the works that allows scalable stats tracking so we can auto-tune this. And we'll add libaio support as well soon. Fow now, it's an opt-in feature for test purposes" * 'for-4.4/io-poll' of git://git.kernel.dk/linux-block: direct-io: be sure to assign dio->bio_bdev for both paths directio: add block polling support NVMe: add blk polling support block: add block polling support blk-mq: return tag/queue combo in the make_request_fn handlers block: change ->make_request_fn() and users to return a queue cookie
| * block: change ->make_request_fn() and users to return a queue cookieJens Axboe2015-11-071-1/+2
| | | | | | | | | | | | | | | | | | No functional changes in this patch, but it prepares us for returning a more useful cookie related to the IO that was queued up. Signed-off-by: Jens Axboe <axboe@fb.com> Acked-by: Christoph Hellwig <hch@lst.de> Acked-by: Keith Busch <keith.busch@intel.com>
* | xtensa: xtfpga: fix integer overflow in TASK_SIZEMax Filippov2015-11-021-2/+4
| | | | | | | | | | | | | | | | | | | | | | This fixes the following warning when default memory region crosses 0x80000000: arch/xtensa/include/asm/processor.h:40:47: warning: integer overflow in expression [-Woverflow] #define TASK_SIZE (PLATFORM_DEFAULT_MEM_START + PLATFORM_DEFAULT_MEM_SIZE) ^ Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | xtensa: fixes for configs without loop optionMax Filippov2015-11-023-0/+6
|/ | | | | | | | | | | | | | | | 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. Cc: <stable@vger.kernel.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* Merge branch 'for-4.3/core' of git://git.kernel.dk/linux-blockLinus Torvalds2015-09-021-9/+3
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull core block updates from Jens Axboe: "This first core part of the block IO changes contains: - Cleanup of the bio IO error signaling from Christoph. We used to rely on the uptodate bit and passing around of an error, now we store the error in the bio itself. - Improvement of the above from myself, by shrinking the bio size down again to fit in two cachelines on x86-64. - Revert of the max_hw_sectors cap removal from a revision again, from Jeff Moyer. This caused performance regressions in various tests. Reinstate the limit, bump it to a more reasonable size instead. - Make /sys/block/<dev>/queue/discard_max_bytes writeable, by me. Most devices have huge trim limits, which can cause nasty latencies when deleting files. Enable the admin to configure the size down. We will look into having a more sane default instead of UINT_MAX sectors. - Improvement of the SGP gaps logic from Keith Busch. - Enable the block core to handle arbitrarily sized bios, which enables a nice simplification of bio_add_page() (which is an IO hot path). From Kent. - Improvements to the partition io stats accounting, making it faster. From Ming Lei. - Also from Ming Lei, a basic fixup for overflow of the sysfs pending file in blk-mq, as well as a fix for a blk-mq timeout race condition. - Ming Lin has been carrying Kents above mentioned patches forward for a while, and testing them. Ming also did a few fixes around that. - Sasha Levin found and fixed a use-after-free problem introduced by the bio->bi_error changes from Christoph. - Small blk cgroup cleanup from Viresh Kumar" * 'for-4.3/core' of git://git.kernel.dk/linux-block: (26 commits) blk: Fix bio_io_vec index when checking bvec gaps block: Replace SG_GAPS with new queue limits mask block: bump BLK_DEF_MAX_SECTORS to 2560 Revert "block: remove artifical max_hw_sectors cap" blk-mq: fix race between timeout and freeing request blk-mq: fix buffer overflow when reading sysfs file of 'pending' Documentation: update notes in biovecs about arbitrarily sized bios block: remove bio_get_nr_vecs() fs: use helper bio_add_page() instead of open coding on bi_io_vec block: kill merge_bvec_fn() completely md/raid5: get rid of bio_fits_rdev() md/raid5: split bio for chunk_aligned_read block: remove split code in blkdev_issue_{discard,write_same} btrfs: remove bio splitting and merge_bvec_fn() calls bcache: remove driver private bio splitting code block: simplify bio_add_page() block: make generic_make_request handle arbitrarily sized bios blk-cgroup: Drop unlikely before IS_ERR(_OR_NULL) block: don't access bio->bi_error after bio_put() block: shrink struct bio down to 2 cache lines again ...
| * block: add a bi_error field to struct bioChristoph Hellwig2015-07-291-9/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we have two different ways to signal an I/O error on a BIO: (1) by clearing the BIO_UPTODATE flag (2) by returning a Linux errno value to the bi_end_io callback The first one has the drawback of only communicating a single possible error (-EIO), and the second one has the drawback of not beeing persistent when bios are queued up, and are not passed along from child to parent bio in the ever more popular chaining scenario. Having both mechanisms available has the additional drawback of utterly confusing driver authors and introducing bugs where various I/O submitters only deal with one of them, and the others have to add boilerplate code to deal with both kinds of error returns. So add a new bi_error field to store an errno value directly in struct bio and remove the existing mechanisms to clean all this up. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: NeilBrown <neilb@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>
* | xtensa: ISS: add missing va_end into split_if_specMax Filippov2015-07-131-2/+6
|/ | | | | Reported-by: David Binderman <dcb314@hotmail.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: don't use module_init for non-modular core network.c codePaul Gortmaker2015-06-161-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | | The network.c code is piggybacking off of the arch independent CONFIG_NET, which is bool. So the code is either built in or absent. It will never be modular, so using module_init as an alias for __initcall is rather misleading. Fix this up now, so that we can relocate module_init from init.h into module.h in the future. If we don't do this, we'd have to add module.h to obviously non-modular code, and that would be a worse thing. Direct use of __initcall is discouraged, vs prioritized ones. Use of device_initcall is consistent with what __initcall maps onto, and hence does not change the init order, making the impact of this change zero. Should someone with real hardware for boot testing want to change it later to arch_initcall or something different, they can do that at a later date. Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Thomas Meyer <thomas@m3y3r.de> Cc: linux-xtensa@linux-xtensa.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* Merge tag 'xtensa-for-next-20150413' of ↵Chris Zankel2015-04-143-14/+52
|\ | | | | | | | | | | | | | | | | | | | | | | git://github.com/jcmvbkbc/linux-xtensa into for_next Xtensa improvements for 4.1: - fix locking issues in ISS network driver; - document PIC and MX interrupt distributor device tree bindings; - add CY7C67300 USB controller support to XTFPGA. Signed-off-by: Chris Zankel <chris@zankel.net>
| * xtensa: xtfpga: add CY7C67300 USB controller supportMax Filippov2015-04-132-0/+37
| | | | | | | | Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
| * xtensa: ISS: fix locking in TAP network adapterMax Filippov2015-04-131-14/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - 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. Cc: <stable@vger.kernel.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* | xtensa: xtfpga: fix hardware lockup caused by LCD driverMax Filippov2015-02-274-25/+51
|/ | | | | | | | | | | | 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. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: remove s6000 variant and s6105 platformDaniel Glöckner2014-10-216-283/+0
| | | | | | | | | | | | | | | | The Stretch s6000 family support has been merged into mainline 5 years ago. There appear to be no users of this code since nobody complained that there is a merge error preventing compilation. Apart from the s6105 IP camera reference design there are no s6000 devices known to ever have run Linux and as the chips are out of production there probably never will be. The successor s7000 no longer uses an Xtensa core for the OS. Let's remove the code until someone is found who actually needs it. Signed-off-by: Daniel Glöckner <dg@emlix.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: make PLATFORM_DEFAULT_MEM parameters configurableMax Filippov2014-10-211-2/+2
| | | | | | This allows using xtfpga platform with both MMU and noMMU cores. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: ISS: don't depend on CONFIG_TTYMax Filippov2014-05-051-1/+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>
* xtensa: xt2000: drop redundant sysmem initializationMax Filippov2014-04-101-11/+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>
* xtensa: xtfpga: set ethoc clock frequencyMax Filippov2014-02-211-0/+1
| | | | | | | Connect xtfpga board ethernet MAC to the clock in the DTS. Set up MAC base frequency in the platform data in case of build w/o CONFIG_OF. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* xtensa: xtfpga: use common clock frameworkMax Filippov2014-02-211-3/+3
| | | | | | | With this change the board needs to set up single clock object, users of this clock will get correct frequency automatically. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
* Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-blockLinus Torvalds2014-01-301-7/+7
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull core block IO changes from Jens Axboe: "The major piece in here is the immutable bio_ve series from Kent, the rest is fairly minor. It was supposed to go in last round, but various issues pushed it to this release instead. The pull request contains: - Various smaller blk-mq fixes from different folks. Nothing major here, just minor fixes and cleanups. - Fix for a memory leak in the error path in the block ioctl code from Christian Engelmayer. - Header export fix from CaiZhiyong. - Finally the immutable biovec changes from Kent Overstreet. This enables some nice future work on making arbitrarily sized bios possible, and splitting more efficient. Related fixes to immutable bio_vecs: - dm-cache immutable fixup from Mike Snitzer. - btrfs immutable fixup from Muthu Kumar. - bio-integrity fix from Nic Bellinger, which is also going to stable" * 'for-3.14/core' of git://git.kernel.dk/linux-block: (44 commits) xtensa: fixup simdisk driver to work with immutable bio_vecs block/blk-mq-cpu.c: use hotcpu_notifier() blk-mq: for_each_* macro correctness block: Fix memory leak in rw_copy_check_uvector() handling bio-integrity: Fix bio_integrity_verify segment start bug block: remove unrelated header files and export symbol blk-mq: uses page->list incorrectly blk-mq: use __smp_call_function_single directly btrfs: fix missing increment of bi_remaining Revert "block: Warn and free bio if bi_end_io is not set" block: Warn and free bio if bi_end_io is not set blk-mq: fix initializing request's start time block: blk-mq: don't export blk_mq_free_queue() block: blk-mq: make blk_sync_queue support mq block: blk-mq: support draining mq queue dm cache: increment bi_remaining when bi_end_io is restored block: fixup for generic bio chaining block: Really silence spurious compiler warnings block: Silence spurious compiler warnings block: Kill bio_pair_split() ...
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