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2017-08-10sparc64: Revert 16GB huge page support.David S. Miller4-63/+3
It overflows the amount of space available in the initial .text section of trap handler assembler in some configurations, resulting in build failures. Signed-off-by: David S. Miller <[email protected]>
2017-08-10locking/atomic: Fix atomic_set_release() for 'funny' architecturesPeter Zijlstra1-0/+2
Those architectures that have a special atomic_set implementation also need a special atomic_set_release(), because for the very same reason WRITE_ONCE() is broken for them, smp_store_release() is too. The vast majority is architectures that have spinlock hash based atomic implementation except hexagon which seems to have a hardware 'feature'. The spinlock based atomics should be SC, that is, none of them appear to place extra barriers in atomic_cmpxchg() or any of the other SC atomic primitives and therefore seem to rely on their spinlock implementation being SC (I did not fully validate all that). Therefore, the normal atomic_set() is SC and can be used at atomic_set_release(). Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Acked-by: Chris Metcalf <[email protected]> [for tile] Cc: Boqun Feng <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Paul McKenney <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Will Deacon <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
2017-08-09sparc64: Use CPU_POKE to resume idle cpuVijay Kumar1-0/+5
Use CPU_POKE hypervisor call to resume idle cpu if supported. Signed-off-by: Vijay Kumar <[email protected]> Reviewed-by: Anthony Yznaga <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-08-09sparc64: Add a new hypercall CPU_POKEVijay Kumar1-0/+18
This adds a new hypercall CPU_POKE for quickly waking up an idle CPU. CPU_POKE should only be sent to valid non-local CPUs. Signed-off-by: Rob Gardner <[email protected]> Signed-off-by: Vijay Kumar <[email protected]> Reviewed-by: Anthony Yznaga <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-08-09sparc64: Add 16GB hugepage supportNitin Gupta4-1/+50
Adds support for 16GB hugepage size. To use this page size use kernel parameters as: default_hugepagesz=16G hugepagesz=16G hugepages=10 Testing: Tested with the stream benchmark which allocates 48G of arrays backed by 16G hugepages and does RW operation on them in parallel. Orabug: 25362942 Signed-off-by: Nitin Gupta <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-08-09sparc64: Support huge PUD case in get_user_pagesNitin Gupta1-2/+13
get_user_pages() is used to do direct IO. It already handles the case where the address range is backed by PMD huge pages. This patch now adds the case where the range could be backed by PUD huge pages. Signed-off-by: Nitin Gupta <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-08-04sparc64: recognize and support sparc M8 cpu typeAllen Pais1-0/+2
Recognize SPARC-M8 cpu type, hardware caps and cpu distribution map. Signed-off-by: Allen Pais <[email protected]> Signed-off-by: David Aldridge <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-08-04sparc64: properly name the cpu constantsAllen Pais1-0/+14
Acked-by: Sam Ravnborg <[email protected]> Acked-by: David S. Miller <[email protected]> Signed-off-by: Allen Pais <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-07-18sparc64: Prevent perf from running during super critical sectionsRob Gardner1-5/+9
This fixes another cause of random segfaults and bus errors that may occur while running perf with the callgraph option. Critical sections beginning with spin_lock_irqsave() raise the interrupt level to PIL_NORMAL_MAX (14) and intentionally do not block performance counter interrupts, which arrive at PIL_NMI (15). But some sections of code are "super critical" with respect to perf because the perf_callchain_user() path accesses user space and may cause TLB activity as well as faults as it unwinds the user stack. One particular critical section occurs in switch_mm: spin_lock_irqsave(&mm->context.lock, flags); ... load_secondary_context(mm); tsb_context_switch(mm); ... spin_unlock_irqrestore(&mm->context.lock, flags); If a perf interrupt arrives in between load_secondary_context() and tsb_context_switch(), then perf_callchain_user() could execute with the context ID of one process, but with an active TSB for a different process. When the user stack is accessed, it is very likely to incur a TLB miss, since the h/w context ID has been changed. The TLB will then be reloaded with a translation from the TSB for one process, but using a context ID for another process. This exposes memory from one process to another, and since it is a mapping for stack memory, this usually causes the new process to crash quickly. This super critical section needs more protection than is provided by spin_lock_irqsave() since perf interrupts must not be allowed in. Since __tsb_context_switch already goes through the trouble of disabling interrupts completely, we fix this by moving the secondary context load down into this better protected region. Orabug: 25577560 Signed-off-by: Dave Aldridge <[email protected]> Signed-off-by: Rob Gardner <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-07-17Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparcLinus Torvalds1-0/+1
Pull sparc fixes from David Miller: - Fix DMA regression in 4.13 merge window, only certain chips can do 64-bit DMA. From Dave Dushar. - Correct cpu cross-call algorithm to correctly detect stalled or stuck remote cpus, from Jane Chu. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc: sparc64: Measure receiver forward progress to avoid send mondo timeout SPARC64: Fix sun4v DMA panic
2017-07-15Merge branch 'work.uaccess-unaligned' of ↵Linus Torvalds1-1/+0
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull uacess-unaligned removal from Al Viro: "That stuff had just one user, and an exotic one, at that - binfmt_flat on arm and m68k" * 'work.uaccess-unaligned' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: kill {__,}{get,put}_user_unaligned() binfmt_flat: flat_{get,put}_addr_from_rp() should be able to fail
2017-07-14sparc64: Measure receiver forward progress to avoid send mondo timeoutJane Chu1-0/+1
A large sun4v SPARC system may have moments of intensive xcall activities, usually caused by unmapping many pages on many CPUs concurrently. This can flood receivers with CPU mondo interrupts for an extended period, causing some unlucky senders to hit send-mondo timeout. This problem gets worse as cpu count increases because sometimes mappings must be invalidated on all CPUs, and sometimes all CPUs may gang up on a single CPU. But a busy system is not a broken system. In the above scenario, as long as the receiver is making forward progress processing mondo interrupts, the sender should continue to retry. This patch implements the receiver's forward progress meter by introducing a per cpu counter 'cpu_mondo_counter[cpu]' where 'cpu' is in the range of 0..NR_CPUS. The receiver increments its counter as soon as it receives a mondo and the sender tracks the receiver's counter. If the receiver has stopped making forward progress when the retry limit is reached, the sender declares send-mondo-timeout and panic; otherwise, the receiver is allowed to keep making forward progress. In addition, it's been observed that PCIe hotplug events generate Correctable Errors that are handled by hypervisor and then OS. Hypervisor 'borrows' a guest cpu strand briefly to provide the service. If the cpu strand is simultaneously the only cpu targeted by a mondo, it may not be available for the mondo in 20msec, causing SUN4V mondo timeout. It appears that 1 second is the agreed wait time between hypervisor and guest OS, this patch makes the adjustment. Orabug: 25476541 Orabug: 26417466 Signed-off-by: Jane Chu <[email protected]> Reviewed-by: Steve Sistare <[email protected]> Reviewed-by: Anthony Yznaga <[email protected]> Reviewed-by: Rob Gardner <[email protected]> Reviewed-by: Thomas Tai <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-07-13Merge tag 'kbuild-v4.13-2' of ↵Linus Torvalds1-1/+0
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull more Kbuild updates from Masahiro Yamada: - Move generic-y of exported headers to uapi/asm/Kbuild for complete de-coupling of UAPI - Clean up scripts/Makefile.headersinst - Fix host programs for 32 bit machine with XFS file system * tag 'kbuild-v4.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (29 commits) kbuild: Enable Large File Support for hostprogs kbuild: remove wrapper files handling from Makefile.headersinst kbuild: split exported generic header creation into uapi-asm-generic kbuild: do not include old-kbuild-file from Makefile.headersinst xtensa: move generic-y of exported headers to uapi/asm/Kbuild unicore32: move generic-y of exported headers to uapi/asm/Kbuild tile: move generic-y of exported headers to uapi/asm/Kbuild sparc: move generic-y of exported headers to uapi/asm/Kbuild sh: move generic-y of exported headers to uapi/asm/Kbuild parisc: move generic-y of exported headers to uapi/asm/Kbuild openrisc: move generic-y of exported headers to uapi/asm/Kbuild nios2: move generic-y of exported headers to uapi/asm/Kbuild nios2: remove unneeded arch/nios2/include/(generated/)asm/signal.h microblaze: move generic-y of exported headers to uapi/asm/Kbuild metag: move generic-y of exported headers to uapi/asm/Kbuild m68k: move generic-y of exported headers to uapi/asm/Kbuild m32r: move generic-y of exported headers to uapi/asm/Kbuild ia64: remove redundant generic-y += kvm_para.h from asm/Kbuild hexagon: move generic-y of exported headers to uapi/asm/Kbuild h8300: move generic-y of exported headers to uapi/asm/Kbuild ...
2017-07-12kernel/watchdog: introduce arch_touch_nmi_watchdog()Nicholas Piggin1-0/+1
For architectures that define HAVE_NMI_WATCHDOG, instead of having them provide the complete touch_nmi_watchdog() function, just have them provide arch_touch_nmi_watchdog(). This gives the generic code more flexibility in implementing this function, and arch implementations don't miss out on touching the softlockup watchdog or other generic details. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Nicholas Piggin <[email protected]> Reviewed-by: Don Zickus <[email protected]> Reviewed-by: Babu Moger <[email protected]> Tested-by: Babu Moger <[email protected]> [sparc] Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Michael Ellerman <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2017-07-11Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparcLinus Torvalds1-0/+24
Pull sparc fixes from David Miller: - Fix symbol version generation for assembler on sparc, from Nagarathnam Muthusamy. - Fix compound page handling in gup_huge_pmd(), from Nitin Gupta. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc: sparc64: Fix gup_huge_pmd Adding the type of exported symbols sed regex in Makefile.build requires line break between exported symbols Adding asm-prototypes.h for genksyms to generate crc
2017-07-11sparc: move generic-y of exported headers to uapi/asm/KbuildMasahiro Yamada1-1/+0
Since commit fcc8487d477a ("uapi: export all headers under uapi directories"), all (and only) headers under uapi directories are exported, but asm-generic wrappers are still exceptions. To complete de-coupling the uapi from kernel headers, move generic-y of exported headers to uapi/asm/Kbuild. With this change, "make headers_install" will just need to parse uapi/asm/Kbuild to build up exported headers. Signed-off-by: Masahiro Yamada <[email protected]>
2017-07-08Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-nextLinus Torvalds10-224/+200
Pull sparc updates from David Miller: 1) Queued spinlocks and rwlocks for sparc64, from Babu Moger. 2) Some const'ification from Arvind Yadav. 3) LDC/VIO driver infrastructure changes to facilitate future upcoming drivers, from Jag Raman. 4) Initialize sched_clock() et al. early so that the initial printk timestamps are all done while the implementation is available and functioning. From Pavel Tatashin. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next: (38 commits) sparc: kernel: pmc: make of_device_ids const. sparc64: fix typo in property sparc64: add port_id to VIO device metadata sparc64: Enhance search for VIO device in MDESC sparc64: enhance VIO device probing sparc64: check if a client is allowed to register for MDESC notifications sparc64: remove restriction on VIO device name size sparc64: refactor code to obtain cfg_handle property from MDESC sparc64: add MDESC node name property to VIO device metadata sparc64: mdesc: use __GFP_REPEAT action modifier for VM allocation sparc64: expand MDESC interface sparc64: skip handshake for LDC channels in RAW mode sparc64: specify the device class in VIO version info. packet sparc64: ensure VIO operations are defined while being used sparc: kernel: apc: make of_device_ids const sparc/time: make of_device_ids const sparc64: broken %tick frequency on spitfire cpus sparc64: use prom interface to get %stick frequency sparc64: optimize functions that access tick sparc64: add hot-patched and inlined get_tick() ...
2017-07-06Merge branch 'uaccess.strlen' of ↵Linus Torvalds2-2/+0
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull user access str* updates from Al Viro: "uaccess str...() dead code removal" * 'uaccess.strlen' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: s390 keyboard.c: don't open-code strndup_user() mips: get rid of unused __strnlen_user() get rid of unused __strncpy_from_user() instances kill strlen_user()
2017-07-06Merge tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mappingLinus Torvalds1-7/+1
Pull dma-mapping infrastructure from Christoph Hellwig: "This is the first pull request for the new dma-mapping subsystem In this new subsystem we'll try to properly maintain all the generic code related to dma-mapping, and will further consolidate arch code into common helpers. This pull request contains: - removal of the DMA_ERROR_CODE macro, replacing it with calls to ->mapping_error so that the dma_map_ops instances are more self contained and can be shared across architectures (me) - removal of the ->set_dma_mask method, which duplicates the ->dma_capable one in terms of functionality, but requires more duplicate code. - various updates for the coherent dma pool and related arm code (Vladimir) - various smaller cleanups (me)" * tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mapping: (56 commits) ARM: dma-mapping: Remove traces of NOMMU code ARM: NOMMU: Set ARM_DMA_MEM_BUFFERABLE for M-class cpus ARM: NOMMU: Introduce dma operations for noMMU drivers: dma-mapping: allow dma_common_mmap() for NOMMU drivers: dma-coherent: Introduce default DMA pool drivers: dma-coherent: Account dma_pfn_offset when used with device tree dma: Take into account dma_pfn_offset dma-mapping: replace dmam_alloc_noncoherent with dmam_alloc_attrs dma-mapping: remove dmam_free_noncoherent crypto: qat - avoid an uninitialized variable warning au1100fb: remove a bogus dma_free_nonconsistent call MAINTAINERS: add entry for dma mapping helpers powerpc: merge __dma_set_mask into dma_set_mask dma-mapping: remove the set_dma_mask method powerpc/cell: use the dma_supported method for ops switching powerpc/cell: clean up fixed mapping dma_ops initialization tile: remove dma_supported and mapping_error methods xen-swiotlb: remove xen_swiotlb_set_dma_mask arm: implement ->dma_supported instead of ->set_dma_mask mips/loongson64: implement ->dma_supported instead of ->set_dma_mask ...
2017-07-03Merge branch 'timers-core-for-linus' of ↵Linus Torvalds1-13/+0
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer updates from Thomas Gleixner: "A rather large update for timers/timekeeping: - compat syscall consolidation (Al Viro) - Posix timer consolidation (Christoph Helwig / Thomas Gleixner) - Cleanup of the device tree based initialization for clockevents and clocksources (Daniel Lezcano) - Consolidation of the FTTMR010 clocksource/event driver (Linus Walleij) - The usual set of small fixes and updates all over the place" * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (93 commits) timers: Make the cpu base lock raw clocksource/drivers/mips-gic-timer: Fix an error code in 'gic_clocksource_of_init()' clocksource/drivers/fsl_ftm_timer: Unmap region obtained by of_iomap clocksource/drivers/tcb_clksrc: Make IO endian agnostic clocksource/drivers/sun4i: Switch to the timer-of common init clocksource/drivers/timer-of: Fix invalid iomap check Revert "ktime: Simplify ktime_compare implementation" clocksource/drivers: Fix uninitialized variable use in timer_of_init kselftests: timers: Add test for frequency step kselftests: timers: Fix inconsistency-check to not ignore first timestamp time: Add warning about imminent deprecation of CONFIG_GENERIC_TIME_VSYSCALL_OLD time: Clean up CLOCK_MONOTONIC_RAW time handling posix-cpu-timers: Make timespec to nsec conversion safe itimer: Make timeval to nsec conversion range limited timers: Fix parameter description of try_to_del_timer_sync() ktime: Simplify ktime_compare implementation clocksource/drivers/fttmr010: Factor out clock read code clocksource/drivers/fttmr010: Implement delay timer clocksource/drivers: Add timer-of common init routine clocksource/drivers/tcb_clksrc: Save timer context on suspend/resume ...
2017-07-03kill {__,}{get,put}_user_unaligned()Al Viro1-1/+0
no users left Signed-off-by: Al Viro <[email protected]>
2017-06-28arch: remove unused macro/function thread_saved_pc()Tobias Klauser2-5/+0
The only user of thread_saved_pc() in non-arch-specific code was removed in commit 8243d5597793 ("sched/core: Remove pointless printout in sched_show_task()"). Remove the implementations as well. Some architectures use thread_saved_pc() in their arch-specific code. Leave their thread_saved_pc() intact. Signed-off-by: Tobias Klauser <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Cc: Ingo Molnar <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2017-06-28sparc: remove arch specific dma_supported implementationsChristoph Hellwig1-3/+0
Usually dma_supported decisions are done by the dma_map_ops instance. Switch sparc to that model by providing a ->dma_supported instance for sbus that always returns false, and implementations tailored to the sun4u and sun4v cases for sparc64, and leave it unimplemented for PCI on sparc32, which means always supported. Signed-off-by: Christoph Hellwig <[email protected]> Acked-by: David S. Miller <[email protected]>
2017-06-28sparc: remove leon_dma_opsChristoph Hellwig1-2/+1
We can just use pci32_dma_ops directly. Signed-off-by: Christoph Hellwig <[email protected]> Acked-by: David S. Miller <[email protected]>
2017-06-28sparc: implement ->mapping_errorChristoph Hellwig1-2/+0
DMA_ERROR_CODE is going to go away, so don't rely on it. Signed-off-by: Christoph Hellwig <[email protected]> Acked-by: David S. Miller <[email protected]>
2017-06-25sparc64: add port_id to VIO device metadataJag Raman1-0/+1
Add port_id field to VIO device metadata to identify the port of VIO device. Signed-off-by: Jagannathan Raman <[email protected]> Reviewed-by: Liam Merwick <[email protected]> Reviewed-by: Shannon Nelson <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-06-25sparc64: Enhance search for VIO device in MDESCJag Raman1-1/+4
Enhances search for VIO device in MDESC by leveraging already existing MDESC APIs. Enhances changes in earlier patch, "sparc: Machine description indices can vary", by using existing MD search functions. It also specifies a match function, thereby enabling device_find_child() to use it for the purpose of matching device nodes in MDESC. An API to find VDEV node in MDESC based on its md_node_info is also added. It is planned to be used by VIO device clients in the future. Signed-off-by: Jagannathan Raman <[email protected]> Reviewed-by: Liam Merwick <[email protected]> Reviewed-by: Shannon Nelson <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-06-25sparc64: enhance VIO device probingJag Raman1-0/+5
- Allocate IRQs for VIO devices during probing. - Allow clients to specify if IRQs would be allocated for a given VIO device. - Cache the device handle of the root node of channel-devices sub-tree in Machine Description (MDESC). Signed-off-by: Jagannathan Raman <[email protected]> Reviewed-by: Liam Merwick <[email protected]> Reviewed-by: Shannon Nelson <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-06-25sparc64: add MDESC node name property to VIO device metadataJag Raman2-3/+6
Add the MDESC node name of MDESC client to VIO device metadata. It is later used to uniquely identify a node in the MDESC. VIO & MDESC APIs are updated to handle this node name. Signed-off-by: Jagannathan Raman <[email protected]> Reviewed-by: Liam Merwick <[email protected]> Reviewed-by: Shannon Nelson <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-06-25sparc64: expand MDESC interfaceJag Raman1-0/+17
Add the following two APIs to Machine Description (MDESC) - mdesc_get_node: Searches for a node in the Machine Description tree based on given information about that node. - mdesc_get_node_info: Retrieves information about a given node. Signed-off-by: Jagannathan Raman <[email protected]> Reviewed-by: Liam Merwick <[email protected]> Reviewed-by: Shannon Nelson <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-06-21Merge branch 'timers/urgent' into timers/coreThomas Gleixner4-30/+6
Pick up dependent changes.
2017-06-19Adding asm-prototypes.h for genksyms to generate crcNagarathnam Muthusamy1-0/+24
This patch adds the prototypes of assembly defined functions to asm-prototypes.h. Some prototypes are directly added as they are not present in any existing header files. Signed-off-by: Nagarathnam Muthusamy <[email protected]> Reviewed-by: Babu Moger <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-06-12sparc64: add hot-patched and inlined get_tick()Pavel Tatashin1-0/+60
Add the new get_tick() function that is hot-patched during boot based on processor we are booting on. Signed-off-by: Pavel Tatashin <[email protected]> Reviewed-by: Steven Sistare <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-06-12sparc64: improve modularity tick optionsPavel Tatashin1-0/+2
This patch prepares the code for early boot time stamps by making it more modular. - init_tick_ops() to initialize struct sparc64_tick_ops - new sparc64_tick_ops operation get_frequency() which returns a frequency Signed-off-by: Pavel Tatashin <[email protected]> Reviewed-by: Bob Picco <[email protected]> Reviewed-by: Steven Sistare <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-06-12sparc64: optimize loads in clock_sched()Pavel Tatashin1-0/+5
In clock sched we now have three loads: - Function pointer - quotient for multiplication - offset However, it is possible to improve performance substantially, by guaranteeing that all three loads are from the same cacheline. By moving these three values first in sparc64_tick_ops, and by having tick_operations 64-byte aligned we guarantee this. Signed-off-by: Pavel Tatashin <[email protected]> Reviewed-by: Shannon Nelson <[email protected]> Reviewed-by: Steven Sistare <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-06-12sparc64: remove trailing white spacesPavel Tatashin1-1/+1
A few changes that were reported by checkpatch, removed all trailing white spaces in these two files. Signed-off-by: Pavel Tatashin <[email protected]> Reviewed-by: Shannon Nelson <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-06-10sparc64: expand LDC interfaceJag Raman1-0/+8
Add the following LDC APIs which are planned to be used by LDC clients in the future: - ldc_set_state: Sets given LDC channel to given state - ldc_mode: Returns the mode of given LDC channel - ldc_print: Prints info about given LDC channel - ldc_rx_reset: Reset the RX queue of given LDC channel Signed-off-by: Jagannathan Raman <[email protected]> Reviewed-by: Aaron Young <[email protected]> Reviewed-by: Alexandre Chartre <[email protected]> Reviewed-by: Bijan Mottahedeh <[email protected]> Reviewed-by: Liam Merwick <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-06-10Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparcDavid S. Miller4-30/+6
2017-06-06sparc64: delete old wrap codePavel Tatashin2-7/+0
The old method that is using xcall and softint to get new context id is deleted, as it is replaced by a method of using per_cpu_secondary_mm without xcall to perform the context wrap. Signed-off-by: Pavel Tatashin <[email protected]> Reviewed-by: Bob Picco <[email protected]> Reviewed-by: Steven Sistare <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-06-06sparc64: add per-cpu mm of secondary contextsPavel Tatashin1-2/+3
The new wrap is going to use information from this array to figure out mm's that currently have valid secondary contexts setup. Signed-off-by: Pavel Tatashin <[email protected]> Reviewed-by: Bob Picco <[email protected]> Reviewed-by: Steven Sistare <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-06-06sparc64: redefine first versionPavel Tatashin1-1/+1
CTX_FIRST_VERSION defines the first context version, but also it defines first context. This patch redefines it to only include the first context version. Signed-off-by: Pavel Tatashin <[email protected]> Reviewed-by: Bob Picco <[email protected]> Reviewed-by: Steven Sistare <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-06-06sparc64: combine activate_mm and switch_mmPavel Tatashin1-20/+1
The only difference between these two functions is that in activate_mm we unconditionally flush context. However, there is no need to keep this difference after fixing a bug where cpumask was not reset on a wrap. So, in this patch we combine these. Signed-off-by: Pavel Tatashin <[email protected]> Reviewed-by: Bob Picco <[email protected]> Reviewed-by: Steven Sistare <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-06-06sparc: Machine description indices can varyJames Clarke1-0/+1
VIO devices were being looked up by their index in the machine description node block, but this often varies over time as devices are added and removed. Instead, store the ID and look up using the type, config handle and ID. Signed-off-by: James Clarke <[email protected]> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=112541 Signed-off-by: David S. Miller <[email protected]>
2017-06-04signal: Remove non-uapi <asm/siginfo.h>Christoph Hellwig1-1/+0
By moving the kernel side __SI_* defintions right next to the userspace ones we can kill the non-uapi versions of <asm/siginfo.h> include include/asm-generic/siginfo.h and untangle the unholy mess of includes. [ tglx: Removed uapi/asm/siginfo.h from m32r, microblaze, mn10300 and score ] Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Cc: [email protected] Cc: Fenghua Yu <[email protected]> Cc: Tony Luck <[email protected]> Cc: [email protected] Cc: Arnd Bergmann <[email protected]> Cc: [email protected] Cc: "David S. Miller" <[email protected]> Link: http://lkml.kernel.org/r/[email protected]
2017-06-04sparc: Simplify <asm/siginfo.h>Christoph Hellwig1-12/+0
There is no need for the forward declaration of compat_siginfo provided here. We can't yet use the generic header as we need to pull in the sparc-specific version of the uapi <asm/siginfo.h>, but this prepares for removing the non-uapi <asm/siginfo.h> entirely. Signed-off-by: Christoph Hellwig <[email protected]> Acked-by: "David S. Miller" <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Cc: [email protected] Cc: Fenghua Yu <[email protected]> Cc: Tony Luck <[email protected]> Cc: [email protected] Cc: Arnd Bergmann <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected]
2017-05-25arch/sparc: Enable queued spinlock support for SPARCBabu Moger3-83/+13
This patch makes the necessary changes in SPARC architecture to enable queued spinlock support. Here are some of the earlier discussions about this feature. https://lwn.net/Articles/561775/ https://lwn.net/Articles/590243/ Cleaned-up the spinlock_64.h. The definitions of arch_spin_xxx are replaced by the function in <asm-generic/qspinlock.h> Signed-off-by: Babu Moger <[email protected]> Reviewed-by: Håkon Bugge <[email protected]> Reviewed-by: Jane Chu <[email protected]> Reviewed-by: Shannon Nelson <[email protected]> Reviewed-by: Vijay Kumar <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-25arch/sparc: Introduce xchg16 for SPARCBabu Moger1-10/+39
SPARC supports 32 bit and 64 bit xchg right now. Add the support for 16 bit (2 byte) xchg. This is required to support queued spinlock feature which uses 2 byte xchg. This is achieved using 4 byte cas instructions with byte manipulations. Also re-arranged the code to call __cmpxchg_u32 inside xchg16. Signed-off-by: Babu Moger <[email protected]> Reviewed-by: Håkon Bugge <[email protected]> Reviewed-by: Steven Sistare <[email protected]> Reviewed-by: Shannon Nelson <[email protected]> Reviewed-by: Jane Chu <[email protected]> Reviewed-by: Vijay Kumar <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-25arch/sparc: Enable queued rwlocks for SPARCBabu Moger3-124/+12
Enable queued rwlocks for SPARC. Here are the discussions on this feature when this was introduced. https://lwn.net/Articles/572765/ https://lwn.net/Articles/582200/ Cleaned-up the arch_read_xxx and arch_write_xxx definitions in spinlock_64.h. These routines are replaced by the functions in include/asm-generic/qrwlock.h Signed-off-by: Babu Moger <[email protected]> Reviewed-by: Håkon Bugge <[email protected]> Reviewed-by: Jane Chu <[email protected]> Reviewed-by: Shannon Nelson <[email protected]> Reviewed-by: Vijay Kumar <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-25arch/sparc: Introduce cmpxchg_u8 SPARCBabu Moger1-0/+29
SPARC supports 32 bit and 64 bit cmpxchg right now. Add support for 8 bit (1 byte) cmpxchg. This is required to support queued rwlocks feature which uses 1 byte cmpxchg. The function __cmpxchg_u8 here uses the 4 byte cas instruction with a byte manipulation to achieve 1 byte cmpxchg. Signed-off-by: Babu Moger <[email protected]> Reviewed-by: Håkon Bugge <[email protected]> Reviewed-by: Steve Sistare <[email protected]> Reviewed-by: Shannon Nelson <[email protected]> Reviewed-by: Jane Chu <[email protected]> Reviewed-by: Vijay Kumar <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-25arch/sparc: Remove the check #ifndef __LINUX_SPINLOCK_TYPES_HBabu Moger1-4/+0
Saw these compile errors on SPARC when queued rwlock feature is enabled. CC kernel/locking/qrwlock.o In file included from ./include/asm-generic/qrwlock_types.h:5, from ./arch/sparc/include/asm/qrwlock.h:4, from kernel/locking/qrwlock.c:24: ./arch/sparc/include/asm/spinlock_types.h:5:3: error: #error "please don't include this file directly" SPARC has this guard which causes compile error when spinlock_types.h is included directly. @ifndef __LINUX_SPINLOCK_TYPES_H @ error "please don't include this file directly" @endif Remove this un-necessary "ifndef __LINUX_SPINLOCK_TYPES_H" stanza from SPARC. Signed-off-by: Babu Moger <[email protected]> Suggested-by: David Miller <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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