aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arc/kernel (follow)
AgeCommit message (Collapse)AuthorFilesLines
2014-12-12ARC: R-M-W assist locks only needed for !LLSCVineet Gupta1-0/+2
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-10-23Merge tag 'remove-weak-declarations' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pciLinus Torvalds1-5/+0
Pull weak function declaration removal from Bjorn Helgaas: "The "weak" attribute is commonly used for the default version of a function, where an architecture can override it by providing a strong version. Some header file declarations included the "weak" attribute. That's error-prone because it causes every implementation to be weak, with no strong version at all, and the linker chooses one based on link order. What we want is the "weak" attribute only on the *definition* of the default implementation. These changes remove "weak" from the declarations, leaving it on the default definitions" * tag 'remove-weak-declarations' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: uprobes: Remove "weak" from function declarations memory-hotplug: Remove "weak" from memory_block_size_bytes() declaration kgdb: Remove "weak" from kgdb_arch_pc() declaration ARC: kgdb: generic kgdb_arch_pc() suffices vmcore: Remove "weak" from function declarations clocksource: Remove "weak" from clocksource_default_clock() declaration x86, intel-mid: Remove "weak" from function declarations audit: Remove "weak" from audit_classify_compat_syscall() declaration
2014-10-22ARC: kgdb: generic kgdb_arch_pc() sufficesVineet Gupta1-5/+0
The ARC version of kgdb_arch_pc() is identical to the generic version in kernel/debug/debug_core.c. Drop the ARC version so we use the generic one. Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-10-13ARC: boot: cpu feature print enhancementsVineet Gupta2-109/+120
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-10-13ARC: boot: consolidate cross-checking of h/w and s/wVineet Gupta1-29/+15
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-10-13ARC: RIP @running_on_hwVineet Gupta2-12/+0
* No active users of this flag anymore * flag itself was no longer usable with new simualtor which acts just like hardware, not providing the special chip-id = 0xffff which good old ISS used to do. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-10-13ARC: rename kconfig option for unaligned emulationVineet Gupta2-3/+3
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-10-13ARC: [plat*] move code out of .init_machine into commonVineet Gupta1-1/+9
All the platforms do the same thing in init_machine callback so move it out of callback into caller of callback Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-09-27ARC: Allow SMP kernel to build/boot on UP-only infrastructureVineet Gupta2-13/+2
In light of recent SNAFU with SMP build, allow simple platform to build as SMP but run UP. * Remove the dependence on simulation SMP extension to enable quick build/test iterations of SMP kernel. * In absence of platform SMP registration, prevent the NULL smp feature name from borkign the system Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-08-09Merge branch 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/miscLinus Torvalds1-30/+17
Pull arch signal handling cleanup from Richard Weinberger: "This patch series moves all remaining archs to the get_signal(), signal_setup_done() and sigsp() functions. Currently these archs use open coded variants of the said functions. Further, unused parameters get removed from get_signal_to_deliver(), tracehook_signal_handler() and signal_delivered(). At the end of the day we save around 500 lines of code." * 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (43 commits) powerpc: Use sigsp() openrisc: Use sigsp() mn10300: Use sigsp() mips: Use sigsp() microblaze: Use sigsp() metag: Use sigsp() m68k: Use sigsp() m32r: Use sigsp() hexagon: Use sigsp() frv: Use sigsp() cris: Use sigsp() c6x: Use sigsp() blackfin: Use sigsp() avr32: Use sigsp() arm64: Use sigsp() arc: Use sigsp() sas_ss_flags: Remove nested ternary if Rip out get_signal_to_deliver() Clean up signal_delivered() tracehook_signal_handler: Remove sig, info, ka and regs ...
2014-08-09Merge tag 'arc-v3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arcLinus Torvalds3-49/+55
Pull ARC changes from Vineet Gupta: "Mostly cleanup/refactoring in core intc, cache flush, IPI send..." * tag 'arc-v3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: mm, arc: remove obsolete pagefault oom killer comment ARC: help gcc elide icache helper for !SMP ARC: move common ops for line/full cache into helpers ARC: cache boot reporting updates ARC: [intc] mask/unmask can be hidden again ARC: [plat-arcfpga] No need for init_irq hack ARC: [intc] don't mask all IRQ by default ARC: prune extra header includes from smp.c ARC: update some comments ARC: [SMP] unify cpu private IRQ requests (TIMER/IPI)
2014-08-06arc: Use sigsp()Richard Weinberger1-7/+3
Use sigsp() instead of the open coded variant. Signed-off-by: Richard Weinberger <richard@nod.at> Acked-by: Vineet Gupta <vgupta@synopsys.com>
2014-08-06arc: Use get_signal() signal_setup_done()Richard Weinberger1-24/+15
Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at> Acked-by: Vineet Gupta <vgupta@synopsys.com>
2014-07-28Merge tag 'v3.16-rc7' into perf/core, to merge in the latest fixes before applying new changesIngo Molnar6-8/+24
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-07-23ARC: [intc] mask/unmask can be hidden againVineet Gupta1-6/+14
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-07-23ARC: [intc] don't mask all IRQ by defaultVineet Gupta1-6/+1
Hardware keeps them enabled on reset, and Linux needs to keep status quo. Any spurious interrupts will be reported/blocked by genirq. This helps remove a SMP IRQ quirk (next commit), where a peripheral IRQ is hard wired to core0, and request_irq()->unmask() happens on core1, keeping the IRQ masked on core0, needing an explicit unmask. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-07-23ARC: prune extra header includes from smp.cVineet Gupta1-8/+0
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-07-23ARC: update some commentsVineet Gupta1-3/+7
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-07-23ARC: [SMP] unify cpu private IRQ requests (TIMER/IPI)Vineet Gupta3-26/+33
The current cpu-private IRQ registration is ugly as it requires need to expose arch_unmask_irq() outside of intc code. So switch to percpu IRQ APIs: -request_percpu_irq [boot core] -enable_percpu_irq [all cores] Encapsulated in helper arc_request_percpu_irq() Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-06-26ARC: [SMP] Fix IPI IRQ registrationNoam Camus1-2/+13
Handle it just like timer. Current request_percpu_irq() would fail on non-boot cpus and thus IRQ will remian unmasked on those cpus. [vgupta: fix changelong] Signed-off-by: Noam Camus <noamc@ezchip.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-06-26ARC: Implement ptrace(PTRACE_GET_THREAD_AREA)Anton Kolesov1-0/+4
This patch adds implementation of GET_THREAD_AREA ptrace request type. This is required by GDB to debug NPTL applications. Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-06-26ARC: optimize kernel bss clearing in early boot codeVineet Gupta2-4/+5
using ARC ZOL which reduces tot num of instructions by half Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-06-26ARC: Fix build breakage for !CONFIG_ARC_DW2_UNWINDVineet Gupta1-1/+1
Fixes: ec7ac6afd07b (ARC: switch to generic ENTRY/END assembler annotations) Reported-by: Anton Kolesov <akolesov@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-06-23ARC: fix build warning in devtreeVineet Gupta1-1/+1
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-06-18arc, perf: Use common PMU interrupt disabled codeVince Weaver1-4/+3
Transition to using the new generic PERF_PMU_CAP_NO_INTERRUPT method for failing a sampling event when no PMU interrupt is available. Signed-off-by: Vince Weaver <vincent.weaver@maine.edu> Acked-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Grant Likely <grant.likely@linaro.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Rob Herring <robh+dt@kernel.org> Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1406150159280.16738@vincent-weaver-1.umelst.maine.edu Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-09Merge tag 'arc-v3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arcLinus Torvalds6-33/+71
Pull ARC updates from Vineet Gupta: "Nothing too exciting here, just minor fixes/cleanup. Only noteworthy ones are: - Moving cache disabling to early boot - ARC UART enabled only if earlyprintk setup in cmdline" * tag 'arc-v3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: Disable caches in early boot if so configured ARC: [arcfpga] Early ARC UART to be only activated by cmdline ARC: [arcfpga] Get rid of legacy BVCI latency unit support ARC: remove duplicate header exports ARC: arc_local_timer_setup() need not pass own cpu id ARC: Fixed spelling errors within comments ARC: make start_thread() out-of-line ARC: fix mmuv2 warning ARC: [SMP] ISS SMP extension bitrot
2014-06-04arc: call find_vma with the mmap_sem heldDavidlohr Bueso1-4/+6
Performing vma lookups without taking the mm->mmap_sem is asking for trouble. While doing the search, the vma in question can be modified or even removed before returning to the caller. Take the lock (shared) in order to avoid races while iterating through the vmacache and/or rbtree. [akpm@linux-foundation.org: CSE current->active_mm, per Vineet] Signed-off-by: Davidlohr Bueso <davidlohr@hp.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-06-03ARC: Disable caches in early boot if so configuredVineet Gupta1-3/+35
Requested-by: Noam Camus <noamc@ezchip.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-06-03ARC: arc_local_timer_setup() need not pass own cpu idVineet Gupta2-6/+7
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-05-13Merge branch 'dt-bus-name' into for-nextRob Herring1-3/+5
2014-05-05ARC: Fixed spelling errors within commentsTerence Eden1-6/+6
[vgupta: fixed changelong + added Randy's suggestion] Signed-off-by: Terence Eden <github.com@shkspr.mobi> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-05-05ARC: make start_thread() out-of-lineVineet Gupta1-0/+23
Helps move out ISA specific bits from a arch exported header Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-05-05ARC: [SMP] ISS SMP extension bitrotVineet Gupta1-18/+0
* Move extension specific code out of common SMP code * Don't enable it by default for SMP Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-04-30ARC: !PREEMPT: Ensure Return to kernel mode is IRQ safeVineet Gupta1-3/+5
There was a very small race window where resume to kernel mode from a Exception Path (or pure kernel mode which is true for most of ARC exceptions anyways), was not disabling interrupts in restore_regs, clobbering the exception regs Anton found the culprit call flow (after many sleepless nights) | 1. we got a Trap from user land | 2. started to service it. | 3. While doing some stuff on user-land memory (I think it is padzero()), | we got a DataTlbMiss | 4. On return from it we are taking "resume_kernel_mode" path | 5. NEED_RESHED is not set, so we go to "return from exception" path in | restore regs. | 6. there seems to be IRQ happening Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: <stable@vger.kernel.org> #3.10, 3.12, 3.13, 3.14 Cc: Anton Kolesov <Anton.Kolesov@synopsys.com> Cc: Francois Bedard <Francois.Bedard@synopsys.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-30of/fdt: update of_get_flat_dt_prop in prep for libfdtRob Herring1-1/+1
Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-05ARC: [SMP] General FixesVineet Gupta1-3/+4
-Pass the expected arg to non-boot park'ing routine (It worked so far because existing SMP backends don't use the arg) -CONFIG_DEBUG_PREEMPT warning
2014-03-26ARC: [clockevent] simplify timer ISRVineet Gupta1-19/+15
* Remove one liner IRQ ACK accessor, it was coming in the way of readability. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-03-26ARC: [clockevent] can't be SoC specificVineet Gupta1-2/+1
So no point keeping it weak Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-03-26ARC: switch to generic ENTRY/END assembler annotationsVineet Gupta2-27/+27
With commit 9df62f054406 "arch: use ASM_NL instead of ';'" the generic macros can handle the arch specific newline quirk. Hence we can get rid of ARC asm macros and use the "C" style macros. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-01-16ARC: [cmdline] support External Device Trees from u-bootVineet Gupta1-3/+12
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-01-16ARC: [cmdline] uboot cmdline handling reworkVineet Gupta2-31/+34
* Moved cmdline copy from asm to "C" - allows for more robust checking of pointer validity etc. * Remove the Kconfig option to do so, base it on a runtime value passed by u-boot Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-12-23ARC: [SMP] optimize IPI send and receiveVineet Gupta1-28/+40
* Don't send an IPI if receiver already has a pending IPI. Atomically piggyback the new msg with pending msg. * IPI receiver looping on xchg() not required References: https://lkml.org/lkml/2013/11/25/232 Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-12-23ARC: [SMP] simplify IPI codeVineet Gupta1-28/+28
* ipi_data is just a word, no need to keep it as struct * find_next_bit() not needed to loop thru a 32bit word, ffs suffices
2013-12-23ARC: [SMP] cpu halt interface doesn't need "self" cpu-idVineet Gupta1-5/+4
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-12-23ARC: [SMP] IPI ACK interface doesn't need "self" cpu-idVineet Gupta1-1/+1
The interface is confusing, it feels like we are getting "sender" info, whereas it is the "receiver", which can very well be retrived by smp_processor_id(), if need be. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-12-23ARC: [SMP] cpumask not needed in IPI send pathVineet Gupta1-9/+14
The current IPI sending callstack needlessly involves cpumask. arch_send_call_function_single_ipi(cpu) / smp_send_reschedule(cpu) ipi_send_msg(cpumask_of(cpu)) --> [cpu to cpumask] plat_smp_ops.ipi_send(callmap) for_each_cpu(callmap) --> [cpuask to cpu] do_plat_specific_ipi_PER_CPU Given that current backends are not capable of 1:N IPIs, lets simplify the interface for now, by keeping "a" cpu all along. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-11-28ARC: [perf] Fix a few thinkosVineet Gupta1-2/+2
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-11-19Merge tag 'arc-v3.13-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arcLinus Torvalds2-0/+327
Pull second set of ARC changes from Vineet Gupta: - Support for Perf from Mischa - Enabling GPIO/Pinctrl drivers for Abilis TB10x platform - New defconfig for buildroot * tag 'arc-v3.13-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: [plat-arcfpga] Add defconfig without initramfs location ARC: perf: ARC 700 PMU doesn't support sampling events ARC: Add documentation on DT binding for ARC700 PMU ARC: Add perf support for ARC700 cores ARC: [TB10x] Updates for GPIO and pinctrl
2013-11-15Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivialLinus Torvalds1-1/+1
Pull trivial tree updates from Jiri Kosina: "Usual earth-shaking, news-breaking, rocket science pile from trivial.git" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (23 commits) doc: usb: Fix typo in Documentation/usb/gadget_configs.txt doc: add missing files to timers/00-INDEX timekeeping: Fix some trivial typos in comments mm: Fix some trivial typos in comments irq: Fix some trivial typos in comments NUMA: fix typos in Kconfig help text mm: update 00-INDEX doc: Documentation/DMA-attributes.txt fix typo DRM: comment: `halve' -> `half' Docs: Kconfig: `devlopers' -> `developers' doc: typo on word accounting in kprobes.c in mutliple architectures treewide: fix "usefull" typo treewide: fix "distingush" typo mm/Kconfig: Grammar s/an/a/ kexec: Typo s/the/then/ Documentation/kvm: Update cpuid documentation for steal time and pv eoi treewide: Fix common typo in "identify" __page_to_pfn: Fix typo in comment Correct some typos for word frequency clk: fixed-factor: Fix a trivial typo ...
2013-11-15ARC: perf: ARC 700 PMU doesn't support sampling eventsMischa Jonker1-0/+4
The ARC 700 does not have an interrupt associated with it, and as such it cannot trigger when a counter overflows. As the counters are 48 bit, it will usually take at least 100 days before a counter overflows, so for mere counting of events, there is no problem. Sampling is not supported though. Signed-off-by: Mischa Jonker <mjonker@synopsys.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.